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1
Neirac, Lucie. "Learning with a linear loss function : excess risk and estimation bounds for ERM and minimax MOM estimators, with applications." Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAG012.
Abstract:
La détection de communautés sur des graphes, la récupération de phase, le clustering signé, la synchronisation angulaire, le problème de la coupe maximale, la sparse PCA, ou encore le single index model, sont des problèmes classiques dans le domaine de l'apprentissage statistique. Au premier abord, ces problèmes semblent très dissemblables, impliquant différents types de données et poursuivant des objectifs distincts. Cependant, la littérature récente révèle qu'ils partagent un point commun : ils peuvent tous être formulés sous la forme de problèmes d'optimisation semi-définie positive (SDP). En utilisant cette modélisation, il devient possible de les aborder du point de vue classique du machine learning, en se basant sur la minimisation du risque empirique (ERM) et en utilisant la fonction de perte la plus élémentaire: la fonction de perte linéaire. Cela ouvre la voie à l'exploitation de la vaste littérature liée à la minimisation du risque, permettant ainsi d'obtenir des bornes d'estimation et de développer des algorithmes pour résoudre ces problèmes. L'objectif de cette thèse est de présenter une méthodologie unifiée pour obtenir les propriétés statistiques de procédures classiques en machine learning basées sur la fonction de perte linéaire. Cela s'applique notamment aux procédures SDP, que nous considérons comme des procédures ERM. L'adoption d'un “point de vue machine learning” nous permet d'aller plus loin en introduisant d'autres estimateurs performants pour relever deux défis majeurs en apprentissage statistique : la parcimonie et la robustesse face à la contamination adversaire et aux données à distribution à queue lourde. Nous abordons le problème des données parcimonieuses en proposant une version régularisée de l'estimateur ERM. Ensuite, nous nous attaquons au problème de la robustesse en introduisant un estimateur basé sur le principe de la "Médiane des Moyennes" (MOM), que nous nommons l'estimateur minmax MOM. Cet estimateur permet de faire face au problème de la robustesse et peut être utilisé avec n'importe quelle fonction de perte, y compris la fonction de perte linéaire. Nous présentons également une version régularisée de l'estimateur minmax MOM. Pour chacun de ces estimateurs, nous sommes en mesure de fournir un “excès de risque” ainsi que des bornes d'estimation, en utilisant deux outils clés : les points fixes de complexité locale et les équations de courbure de la fonction d'excès de risque. Afin d'illustrer la pertinence de notre approche, nous appliquons notre méthodologie à cinq problèmes classiques en machine learning, pour lesquels nous améliorons l'état de l'artCommunity detection, phase recovery, signed clustering, angular group synchronization, Maxcut, sparse PCA, the single index model, and the list goes on, are all classical topics within the field of machine learning and statistics. At first glance, they are pretty different problems with different types of data and different goals. However, the literature of recent years shows that they do have one thing in common: they all are amenable to Semi-Definite Programming (SDP). And because they are amenable to SDP, we can go further and recast them in the classical machine learning framework of risk minimization, and this with the simplest possible loss function: the linear loss function. This, in turn, opens up the opportunity to leverage the vast literature related to risk minimization to derive excess risk and estimation bounds as well as algorithms to unravel these problems. The aim of this work is to propose a unified methodology to obtain statistical properties of classical machine learning procedures based on the linear loss function, which corresponds, for example, to the case of SDP procedures that we look as ERM procedures. Embracing a machine learning view point allows us to go into greater depth and introduce other estimators which are effective in handling two key challenges within statistical learning: sparsity, and robustness to adversarial contamination and heavy-tailed data. We attack the structural learning problem by proposing a regularized version of the ERM estimator. We then turn to the robustness problem and introduce an estimator based on the median of means (MOM) principle, which we call the minmax MOM estimator. This latter estimator addresses the problem of robustness and can be constructed whatever the loss function, including the linear loss function. We also present a regularized version of the minmax MOM estimator. For each of those estimators we are able to provide excess risk and estimation bounds, which are derived from two key tools: local complexity fixed points and curvature equations of the excess risk function. To illustrate the relevance of our approach, we apply our methodology to five classical problems within the frame of statistical learning, for which we improve the state-of-the-art results
2
Alshahrany, Shaya. "Rolling contact fatigue in heavily loaded gear transmission contacts." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/90422/.
Abstract:
This thesis examines the influence of asperities such as found on the teeth of gears and discs, and failure mechanisms associated with rough surface Elastohydrodynamic Lubrication (EHL). The principal outcomes of the research provide a good insight into fatigue life, residual stress effects, damage prediction and surface contact failures. In particular, the study is intended to provide understanding into the residual stress distribution resulting from plastic deformation of surface asperities in the running in process. The residual stress is then added to the asperity elastic stress distribution and examined in detail to see the effects on fatigue damage and fatigue life. So, a theoretical model has been developed to assist design against the residual stress effect and surface contact fatigue, such as micropitting. The technique used in the study starts with developing an elastic plastic model of the rough surface by using the Abaqus Finite Element analysis software package. This is a nonlinear problem and ranges of applied loads have been applied to the as-manufactured surfaces causing the asperity features to experience varying degrees of plastic deformation. The pre and post running roughness profiles are studied in order to assess the level of plastic deformation actually occurring at significant surface asperity features by aligning the pre and post running profiles. This results in a new technique that has helped to identify the level of plastic deformation occurring in the practice, and also to make a comparison with FEA contact analysis for the same asperity features to identify the appropriate residual stress field. The residual stress field associated with the plastic deformation was extracted and evaluated. The extracted residual stress field was transferred to a form that facilitated IV inclusion in stress evaluation code to obtain the stress history for the material subject to loading in an EHL contact. The research carried out considers surface fatigue analysis with and without a residual stress field, so as to establish the influence of asperity plastic deformation on the fatigue properties of the surface. All the work is based on numerical simulation of surface fatigue failure in EHL situations and carried out numerically. The procedure can be applied quickly and gives the opportunity to apply several models and investigate the influence of all the model parameters on material deformation and fatigue life.
3
Vassiliou, Andreas Demetriou. "Transformation and precipitation in vanadium treated steels." Thesis, Sheffield Hallam University, 1987. http://shura.shu.ac.uk/9022/.
Abstract:
A series of carbon manganese steels containing varying amounts of carbon, vanadium and nitrogen was investigated in relation to the solubility of VC and VN in austenite, the grain coarsening characteristics of austenite, the tempering of martensite and other structures, the transformation during continuous cooling, the effect of vanadium addition and increasing nitrogen content on the thermo-mechanical processing of austenite, and the transformation of various morphologies of austenite to ferrite. The sites for preferential nucleation and growth of ferrite were identified and the effect of ferrite grain size inhomogeneity was investigated with a view to minimising it. The C/N ratio in the V(CN) precipitates was largely controlled by C/N ratio in the steel and it was also influenced by the austenitising treatment. As expected, the solubility of VN was less than that of VC. A systematic investigation of austenitising time and temperature on the grain coarsening characteristics was carried out showing the effects of vanadium, carbon and nitrogen. It was tentatively suggested that C-C and N-N clustering in the vanadium free steels controlled the grain growth whereas in the presence of vanadium, it was shown that VN and VC pinned the austenite grain boundaries and restricted grain growth. However coarsening or solution of VC and VN allowed the grain bondaries to migrate and grain coarsening occurred. The grain coarsening temperature was controlled predominantly by VN, whilst the VC dissolved frequently below the grain coarsening temperature. In the as quenched martensite, increasing nitrogen progressively increased the as quenched hardness, and the hardness also greatly increased with increasing carbon and vanadium added together. Examining the precipitation strengthening in tempered martensite showed that in the absence of vanadium, martensite softened progressively with increasing temperature and time. Vanadium additions increased the hardness level during low temperature tempering and at higher tempering temperature introduced secondary hardening. The intensity of secondary hardening increased with increasing vanadium, whereas austenitising temperature had little or no effect. The softening after the secondary hardening was faster after austenitising at the higher temperature and when recrystallisation occurred at the highest tempering temperatures, the hardness was lower due to coarse recrystallised ferrite. Isothermal transformation studies showed that vanadium additions raised the Ar3 temperature and accelerated ferrite nucleation, whilst the growth of ferrite was delayed due to the format ion of V(CN) interphase and general precipitation pinning, of the transformation front. Increasing nitrogen content in the V-steel increased the incubation period for ferrite nucleation and increasingly reduced the ferrite growth by increasing V(CN) precipitation pinning of the transformation front. Transformation during continuous cooling was examined in relation to the effect of vanadium, carbon and nitrogen together with the effect of austenitising temperature. Increasing austenitising temperature increased the austenite grain size, and it then became apparent that increasing vanadium, carbon and nitrogen increased the hardenability and raised the hardness level of the jominy curve for the non-martensitic products. This was particularly the case for the higher austenitising temperature, but at lower austenitising temperatures the effects were much less. A small increase in hardness was observed at some distance from the quenched end of the jominy specimen, which distance increased with increasing austenitising temperature. Tempering at 550°C caused small increases in hardness which developed into maxima, and occurred at shorter distances from the quenched end. Increasing tempering temperature and time caused the peak to be overaged and the general hardness level was increased. This increase in general hardness was attributed to the dislocation density and supersaturation of the transformation products, which caused hardening during tempering by precipitation of V(CN) particles. The effects of vanadium addition and increasing nitrogen, together with the deformation temperature and amount of deformation, were examined in relation to the austenite morphologies and subsequent ferrite nucleation and growth. Vanadium additions, increased ferrite nucleation by refining the austenite grain size and increased the volume fraction of ferrite at a given transformation time by providing additional nucleation sites both at the V(CN) precipitates, and at the austenite/ferrite interfaces. In the absence of apparent retained deformation, and at low nitrogen contents, nucleation of ferrite was delayed but the ferrite grew rapidly due to insufficient V(CN) to pin the ferrite/austenite interface. Increasing nitrogen however retarded both ferrite nucleation and growth, and reasons for this have been discussed. The growth of ferrite during isothermal holding was dictated by the nucleation sites such as grain boundaries, deformation bands and intra-granular nucleation sites. Both grain boundary and deformation band nucleated ferrite formed small ferrite grain sizes due to the numerous nuclei and their early impigement, whereas intragranularly nucleated ferrite grew rapidly and formed large ferrite grains due to insufficient precipitation to pin the transformation front. This type of structure led to duplex ferrite grain sizes and inhomogeneous type structures. Continuously cooled specimems verified these effects.
4
Horlacher, Rosalí, and Lidia Paz. "Evaluación de técnicas de fijación de catéteres venosos periféricos en el servicio de clínica quirúrgica del Hospital Enfermeros Argentinos de General Alvear durante los meses de abril a julio del año 2013." Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería, 2013. http://bdigital.uncu.edu.ar/9022.
Abstract:
En el servicio de Clínica Quirúrgica del Hospital Enfermeros Argentinos, ubicado en el departamento de General Alvear, Mendoza, se ha identificado que, en un gran número de pacientes quirúrgicos con catéter venoso periférico han aparecido diversas complicaciones en la integridad de la piel, no pudiendo alcanzar una permanencia de 72hs, requiriendo una nueva canalización para la continuidad del tratamiento. Analizando los pasos de la técnica de inserción de catéter periférico se puede identificar como posible factor causal de complicaciones, la ruptura del proceso aséptico al momento de la fijación del catéter con cinta adhesiva, ya que esta no guarda la esterilidad requerida. Es fundamental entonces buscar una técnica alternativa que mantenga el punto de inserción del catéter en condiciones de esterilidad. Este trabajo de investigación tiene como objetivo comprobar la efectividad de la utilización de la gasa estéril, o cinta adhesiva en el momento de la fijación, en el punto de inserción de los catéteres al realizar la técnica de canalización periférica por parte del personal de enfermería de dicho hospital en el periodo de abril a julio del 2013.Fil: Horlacher, Rosalí. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería..
Fil: Paz, Lidia. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería..
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Bosi, Gianluca. "Entropia, contenuto informativo e network linguistici: applicazioni al manoscritto di Voynich." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9022/.
Abstract:
La tesi si propone di investigare, mediante un approccio puramente quantitativo, il contenuto informativo e la morfologia della lingua del manoscritto di Voynich (VMS), noto per essere redatto in un alfabeto sconosciuto e tuttora non decodificato. Per prima cosa, a partire dal concetto di entropia, sviluppato nel contesto della teoria della informazione, si costruisce una misura del contenuto informativo di un testo (misura di Montemurro-Zanette); quindi, si presentano diversi esperimenti in cui viene misurata l'informazione di testi sottoposti a trasformazioni linguistiche di vario genere(lemmatizzazione, traduzione, eccetera). In particolare, l'applicazione al VMS di questa misura unita ad altre tecniche, ci permette di indagare la struttura tematica del manoscritto e le relazioni tra i suoi contenuti, verificando che esiste una continuità semantica tra pagine consecutive appartenenti a una stessa sezione. La grande quantità di hapax nel manoscritto ci porta poi a considerazioni di tipo morfologico: suggerisce infatti che la lingua del manoscritto sia particolarmente flessiva. La ricerca, in particolare, di sequenze di hapax consecutivi, ci porta a identificare -verosimilmente- alcuni nomi propri. Proprio per approfondire la morfologia della lingua si costruisce infine un grafo linguistico basato sostanzialmente sulla distanza di Hamming; confrontando la topologia di questi grafi per alcune lingue e per la lingua del VMS si osserva che quest'ultimo si distingue per maggiore densità e connessione. Traendo le conclusioni, i forti indizi a favore della presenza di un contenuto informativo nel testo confermano l'ipotesi che questo sia scritto in una vera lingua. Tuttavia, data la notevole semplicità delle regole di costruzione morfologiche, a nostro parere non sembra assimilabile ad una lingua naturale conosciuta, ma piuttosto ad una artificiale, creata appositamente per questo testo.
6
Ruppert, Lídia Alice Soares [UNESP]. "Ensaios sobre o investimento direto externo: os casos das empresas espanholas e coreanas." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/90022.
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ruppert_las_me_arafcl.pdf: 924784 bytes, checksum: 412c3938ee0364e93aec67d9e4532404 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este trabalho tem o objetivo de analisar o processo de internacionalização via investimento direto externo (IDE) das empresas espanholas e coreanas a partir dos anos 90. Para isso, será feita uma revisão das abordagens não convencionais da lógica do investimento direto externo e de seus condicionantes. Ademais, serão tratadas as mudanças nos ambientes macroeconômicos e institucionais desde o pós-guerra e seus impactos sobre as estratégias de concorrência das corporações e dos movimentos de IDE. É a partir deste mapeamento global do IDE que se dará o estudo dos determinantes, das características e da evolução do investimento direto externo das empresas espanholas e coreanas nas décadas de 1990 e 2000
This dissertation aims to analyze the internationalization process through foreign direct investment (FDI) of Spanish and Korean companies since the 90's. For that, it will be made a review of unconventional approaches about the logic of foreign direct investment and its limitations. Moreover, it will be explicited the changes in macroeconomic and institutional environments in the post-war and its impact on the competitive strategies of corporations and FDI flows. It is from this FDI global mapping that it will be studied the determinants, characteristics and evolution of foreign direct investment of Spanish companies and Korea in the past two decades
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Archangelo, Rosemeire Marques Ribeiro [UNESP]. "Sanção expiatória versus sanção por reciprocidade: estudo exploratório em dez classes de educação infantil. -." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/90122.
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archangelo_rmr_me_rcla.pdf: 572708 bytes, checksum: 00b57050a9b4c2d242956a563cacc72c (MD5)A legislação, nacional, foi palco da normatização da punição durante séculos e, as pesquisas demonstraram que a ausência de subsídios teóricos sobre a temática faz com que o docente, na atualidade, paute-se no senso comum e transfiram para a família e à legislação, a culpa pela lacuna em sua formação de base. Inúmeros casos de agressão dentro do ambiente escolar, publicados na mídia mostram que estamos vivendo um momento delicado o qual demanda mudanças radicais na concepção de educação e mesmo na organização da ação pedagógica. Nesse sentido, os cursos de formação continuada constituem-se enquanto um dos recursos para a melhoria da ação pedagógica trabalhando com os subsídios teóricos necessários à essa transformação. Iniciamos nossa pesquisa a partir da hipótese de que o docente, egresso de cursos de formação continuada sobre a temática da moralidade, no momento em que fosse necessário aplicar uma sanção esta seria por reciprocidade e não expiatória. Selecionamos três municípios, seis escolas e dez salas de aula, nas quais realizamos 200 horas de observação. Os dados demonstraram diferenças qualitativas nos ambientes estudados no que se refere a organização do espaço visando a operacionalização de uma ação pedagógica nos princípios da democracia, todavia, nos quesitos regras, cobrança das regras e sanção, os sujeitos dessa pesquisa recorreram ao uso da sanção expiatória em detrimento da sanção por reciprocidade. Esse estudo apontou para a necessidade de modificar dinâmica da formação continuada, que deve ser de alto nível, integrando teoria-prática no processo de ação, reflexão, inclusão de novos desafios, reflexão, ação. Com formações pontuais, locais, dentro do contexto das unidades...
The legislation, national stage was the normalization of punishment for centuries, and research has shown that the absence of theoretical support on the issue makes the teacher, in actuality, is guided by common sense and transfer to the family and the law the blame for the gap in their basic training. Many cases of aggression within the school environment, published in the media show that we are living a delicate moment which demand radical changes in the conception of education and even the organization of pedagogical action. In this sense, continuing education courses constitute themselves as a resource for improving the pedagogical action working with the theoretical support needed for this transformation. We began our search from the assumption that the teacher and egress of continuing education courses on the topic of morality, when it was necessary to impose a penalty for this would be reciprocal and not scapegoated. Selected three districts, six schools and ten classrooms, in which we conducted 200 hours of observation. The data showed qualitative differences in the study regarding the organization of space aimed at the operationalization of a pedagogical action the principles of democracy, however, questions the rules, billing rules and penalties, the subjects of this study resorted to the use of expiatory instead of punishment by reciprocity. This study pointed to the need to change the dynamics of continuing education, which should be high level, integrating theory and practice in the process of action, reflection, adding new challenges, reflection, action. With ad hoc formations, locations, within the context of school units, involving all professionals
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Parra, Sánchez Aldo Iván [UNESP]. "Etnomatemática e educação própria." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/90222.
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parrasanchez_ai_me_rcla.pdf: 836437 bytes, checksum: 64e3437e252d79704078be8141878ae1 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este trabalho desenvolve uma experiência de cunho etnográfico em três diferentes comunidades do povo indígena Nasa, localizadas no estado de Cauca na Colômbia, onde se fez um acompanhamento aos processos educativos e escolares das comunidades, o que permitiu identificar a presença de diferentes tipos de educação indígena, e conseguir reportar alguns aspectos do semeado de milho, que é uma pratica agrícola ancestral desse povo, e que pode ser considerada como uma pratica ritual, educativa e matemática. A análise do trabalho de pretende elucidar relações entre a proposta educativa que esse povo tem desenvolvido desde 1978, chamada de Educação Própria, e uma particular linha de pesquisa na Etnomatemática, que focaliza o estudo das influencias dos mitos e rituais nos saberes e fazeres dos grupos culturais. Foram encontradas relações de convergência, diferenças de ênfase e até contradições entre os dois referenciais teóricos. Finalmente se levantam possibilidades de complementaridade entre os dois enfoques
This research develops an ethnographic experience in three different communities of Nasa indigenous people, located in the state of Cauca, Colombia. There was an accompaniment to the educational and scholar process in these communities, which identified the presence of different types of indigenous education and reported some aspects of the corn planting, which is an ancient agricultural practice of the Nasa people, that can be regarded as a ritual, educational and mathematical practice. Work’s analysis aims to elucidate relationships between the educational proposal that Nasa people have developed since 1978, called Proper- Education, and a particular line of research in ethnomathematics, which focuses on the study of the influence of myths and rituals in the knowledge and actions of cultural groups.There were found converge relationships , differences of emphasis and even contradictions between the two considered theoretical frameworks . Finally, it looms the possibility of complementarity between the two approaches
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Petroni, Ester Tereza Senger [UNESP]. "Perfil pessoal e profissional de professores do ensino fundamental e médio: uma investigação com profissionais pertencentes à diretoria de ensino de Jaú-SP." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/90322.
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petroni_ets_me_arafcl_prot.pdf: 334416 bytes, checksum: 8e9d3b0f2a7cbb794889aa05b0636cf9 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Investigação científica integrada ao Programa de Educação Escolar - Eixo Temático: Trabalho Educativo; Linha de Pesquisa: Trabalho Docente. Trata-se de um estudo empírico objetivado a traçar o perfil de professores. Participaram deste estudo 100 professores do segundo ciclo do ensino fundamental e ensino médio pertencentes à diretoria de ensino de Jaú bem como de um programa de formação continuada oferecido pelo governo do estado de São Paulo em parceria com uma Universidade Comunitária. O questionário foi constituído de 56 itens agrupados em três categorias: 1. identificação pessoal e profissional; 2. acesso a cultura e atualização profissional; 3. avaliação da profissão e prática docente, sendo aplicado de forma coletiva e em período de aula. Os dados foram analisados à luz da estatística descritiva, utilizando-se como recurso a ferramenta SPSS/ForWindows. Através do método estatístico foi possível descrever os dados obtidos para proporcionar discernimento entre o perfil de professores brasileiros e o da amostra estudada. Os principais achados deste estudo apontam para as seguintes características do perfil do professor: a grande maioria constitui-se de professoras, portanto há uma prevalência absoluta no sexo feminino; a faixa etária desta categoria se concentra entre 26 a 45 anos; o tempo de atuação se situa entre 11 e 20 anos; a grande maioria cursou o ensino fundamental e médio na rede pública e a graduação na rede privada; como o rendimento familiar médio aproximado é de 6 a 10 salários-mínimos, é grande a proporção daqueles que possuem computador em casa. No que diz respeito ao acesso à cultura, os participantes apresentaram uma diversidade de atividades culturais, desde ir ao cinema até o show de rock, com distribuição de freqüência diferentes e marcadas por três índices ir ao cinema...
Scientific investigation integrated to the program on Education - Thematic Focus: Educational Work; Research Focus: Teacher Work. This empirical study aims at tracing teacher's profile. The study involved 100 teachers of elementary school (segment II) and secondary school, who belong to the education bureau of Jaú and who attend a São Paulo state sponsored course of continual formation held in partnership with a regional Community University. The questionnaire was formed by 56 items grouped in three categories: 1. personal and professional identification; 2. access to culture and professional update; and 3. assessment of the profession and of the teaching practice, and it was applied collectively and during classes time. Data were then analyzed in light of descriptive statistic using SPSS/ForWindos, allowing us to describe the data obtained to provide discernment between the Brazilian teachers profile compared to that of the sample under study. The main findings point that: most teachers are female, indicating to an absolute prevalence of women in the area; the more prevalent age range is between 26 and 45 years; the time in service is found between 11 and 20 years; most subjects attended public schools during elementary and secondary education but attended private institutions of higher education; since the approximate average family earnings is of 6to 10 minimal salaries, the proportion of teachers who have a computer at home is high. In terms of access to culture, participants present a diversity of cultural activities such as going to the movies or to rock concerts, watching videos at home, and going to places with live music playing, where the reference was last year. Together with such findings other meaningful data related to reading habits were found. Stimulation to reading in childhood was found to come primarily... (Complete abstract, click electronic access below)
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Cervi, Devanir de Araújo [UNESP]. "Avaliação da infiltração apical, pós tratamento de canais radiculares, utilizando 4 diferentes técnicas combinadas de instrumentação rotatória e obturação por termoplastificação. Estudo in vitro." Universidade Estadual Paulista (UNESP), 2002. http://hdl.handle.net/11449/90422.
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cervi_da_me_arafo.pdf: 2178427 bytes, checksum: c6ea8e8823b6b51fa82888cf17798887 (MD5)Foram utilizados 115 dentes pré molares inferiores de humanos, que foram divididos em 5 grupos de 16 dentes cada; sendo 5 grupos com 5 dentes cada, utilizados como controle positivo e, 5 grupos de 2 dentes como controle negativo. Em todos os dentes após a abertura coronária, foi realizado o desbridamento foraminal com uma lima tipo Kerr no 15 até 1mm além do forame apical e o preparo biomecânico a 1mm aquém comprimento real do dente. Foram utilizados para a instrumentação dos canais radiculares, os sistemas de limas rotatórias de níquel titânio ProFile 0.4/.06 e Quantec, e a técnica Clássica Modificada; sendo o batente apical preparado até a lima 45 de cada técnica de instrumentação. A cada troca de lima, foi utilizado o hipoclorito de sódio à 1% como solução irrigadora. Posteriormente os dentes foram obturados pelos sistemas de guta-percha termoplastificada Thermafil, Microseal e pela técnica da Condensação Lateral Ativa; utilizando como cimento obturador; AH Plus. Após as obturações os dentes foram impermeabilizados com esmalte de unha, exceto, o 1mm ao redor do forame apical; imersos no corante de azul de metileno à 2% sob vácuo e fraturados de maneira a serem obtidas duas hemi-partes. A penetração do corante foi medida com auxílio de um perfilômetro, e os dados, após análise estatística mostraram que, o grupo de dentes instrumentados pelo sistema ProFile 0.4/.06 e obturados com o sistema Thermafil, apresentaram menor infiltração apical, quando comparado com os demais grupos.
It was evaluated 115 mandibular premolars of humans, that were divided in 5 groups of 16 teeth each; 5 groups with 5 teeth each, used as positive control and 5 groups of 2 teeth as negative control. After coronary acess, the apical patency was accomplished with a file type Kerr no 15 up to 1mm after the apical foramen and prepared to 1mm short of working length. Instrumentation wasdone, using ProFile 0,04 and 0,06 and Quantec, stotary files and the Modified Classic technique; The apical preparation used a file 45 as memory file. After each file change, sodium hypochlorite was used at 1% as irrigation solution. The teeth were filled using systems of thermoplasticized gutta-percha Thermafil, Microseal and the technique of the Active Lateral Condensation. The sealer used was the AH Plus root canal sealer. After obturation the teeth were waterproof with fingernail enamel, except, the 1mm short of the apical foramen; immerged in the coloring of methylene blue at 2% under vacuum and fractured in a way where it was obtained two hemi-parts. The penetration of the coloring was measured with aid of a Nikon Profile Projector, and the data, after statistical analysis showed that, the group of teeth under the system ProFile 0,04 and 0,06 and filled with the system Thermafil, presented lower leakage apical, when compared with other groups.
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Brunelli, Luciana Trevisan [UNESP]. "Produção de cerveja com mel: características físico-químicas, energética e sensorial." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/90522.
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brunelli_lt_me_botfca.pdf: 484896 bytes, checksum: 8a1ce9743312177006e3c24ff35c682f (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Universidade Estadual Paulista (UNESP)
O objetivo do presente trabalho foi produzir e caracterizar físico-quimicamente, energeticamente e sensorialmente cervejas elaboradas com mel.. Os ensaios de produção de cerveja foram feitos com nove tratamentos, combinação de três concentrações de extrato original no mosto (11, 13 e 15 °Brix) e três porcentagens de mel na formulação do mosto (0, 20 e 40%). O experimento foi inteiramente casualizado com duas repetições, perfazendo dezoito parcelas experimentais. A mosturação foi realizada pelo processo de infusão. O mel foi adicionado na etapa de fervura. Depois de clarificado, o mosto teve seu teor de extrato corrigido e foi inoculado com levedura de baixa fermentação. A fermentação ocorreu a 10 °C. A cerveja foi engarrafada manualmente e armazenadas em freezer à temperatura de 0 °C por 15 dias. As cervejas foram analisadas físico-quimicamente, além da quantificação dos valores energéticos. A análise sensorial foi realizada por meio do teste de escala hedônica estruturada de nove pontos. A presença de mel como matéria prima cervejeira aumenta a fermentabilidade dos mostos e das cervejas, além de favorecer a formação de CO2 e elevar a densidade de espuma e total de espuma nas cervejas. Além disso, o mel diminui os teores de acidez total, de amargor e de turbidez, promovendo uma melhor clarificação na cerveja, em relação às cervejas puro malte. Todas as cervejas foram consideradas claras, pois a intensidade de cor está abaixo de 20 EBC. As cervejas comuns apresentaram os menores valores energéticos em relação às cervejas fortes e as extras. A cerveja forte elaborada sem o mel na formulação apresentou o maior valor energético. Os teores de álcool, dextrina e proteína foram predominantes nos valores energéticos das cervejas. Todas as cervejas elaboradas...
The objective of this study was to produce and characterize physico-chemically, energetically and sensory beer made with honey. The tests of beer production were made with nine treatments, three combination of the original extract concentrations in the wort (11, 13 and 15 ° Brix) and three percentages of honey in the wort formulation (0, 20 and 40%). The experiment was completely randomized with two replications, totaling eighteen plots. The mashing process was performed by infusion. The honey was added in the boiling step. After clarified, the wort had it extract contents corrected and was inoculated with low fermentation yeast. The fermentation occurred at 10 ° C. The beer was manually bottled and stored in a freezer at the temperature of 0 °C for 15 days. The beers were physico-chemically analyzed, beyond the energy values quantification. Sensory analysis was performed by means of the nine-points hedonic scale. The presence of honey as an beer increases the the musts and beers fermentability, besides encourage the CO2 formation and increasing the foam density and total foam in beers. In addition, honey decreases the total acidity levels, bitterness and turbidity, promoting a better beer clarification, regarding to pure malt beers. All beers were considered clear, since the... (Complete abstract click electronic access below)
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Rabonato, Aline Cristina [UNESP]. "Linhagens fúngicas na hidrólise enzimática de bagaço de cana-de-açúcar." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/90622.
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rabonato_ac_me_botfca.pdf: 701073 bytes, checksum: 0b8419eb4d8b3409bea93742802fc3aa (MD5)A produção de bioetanol e de açucares a partir do caldo de cana gera como um dos subprodutos, o bagaço. Atualmente, esse último, uma biomassa industrial lignocelulósica, pode ser aproveitado para produção de etanol de segunda geração, desde que previamente submetido a processos hidrolíticos para gerar açúcares fermentescíveis. O objetivo deste trabalho foi estimar a produção de bioetanol a partir desta biomassa agroindustrial. Para tanto, foram utilizados os cogumelos Lentinula edodes, Pleurotus ostreatus, Pleurotus eryngii e Pycnoporus sanguineus como potenciais fontes produtoras das enzimas lacase, manganês peroxidase e lignina peroxidase, capazes de hidrolisar o bagaço de cana-de-açúcar. As maiores atividades enzimática observadas para L. edodes, P. ostreatus, P. sanguineus e P. eryngii para lacase foram de 39,23 U-mL ao 25º dia de incubação, 2,5 U-mL e 80 U-mL ao 27º dia de incubação, e 16,45 U-mL ao 15º dia, respectivamente. As enzimas MnP e LiP não apresentaram resultados expressivos. A hidrólise enzimática do bagaço de cana in natura (32,17% de hemicelulose, 52,45% de celulose e 10,62% de lignina) e o bagaço de cana hidrolisado com H2SO4 7,0% (0,20% de hemicelulose, 68,82% de celulose e 25,33% de lignina) foram avaliados para cada conjunto enzimático obtido. Comparado aos demais, as enzimas produzidas pelo P. sanguineus incubado em bagaço in natura apresentaram uma melhor eficiência na conversão dos açúcares, com teor médio de 0,14 g-L de glicose. Embora os baixos teores de glicose determinada nesse trabalho, em relação com a literatura, pode-se afirmar que as enzimas lacase, manganês peroxidase e lignina peroxidase, demonstraram ter potencial hidrolítico, principalmente para as produzidas pelo fungo P. sanguineus
The production of ethanol and sugar from sugarcane juice bagasse is generate byproduct. Currently, the bagasse, an industrial lignocellulosic biomass can be used for production of second generation ethanol, since when submitted to hydrolytic processes generate fermentable sugars. The objective of this study was to estimate the production of bioethanol from this agro biomass. Lentinula edodes, Pleurotus ostreatus, Pleurotus eryngii and Pycnoporus sanguineus were used as potential sources producing enzymes laccase, manganese peroxidase and lignin peroxidase, capable of hydrolyzing the sugarcane bagasse. The highest activity of enzymes, observed for L. edodes, P. ostreatus, P. sanguineus and P. eryngii were to 39.23 U-mL laccase after 25 days of incubation, 2,5 U-mL and 80 U-mL after 27 days of incubation, and 16,45 U-mL on 15 day, respectively. MnP and LiP showed no significant results. The enzymatic hydrolysis of sugarcane bagasse in natura (32,17% hemicellulose, cellulose 52,45% and 10,62% lignin) and bagasse hydrolyzate with 7,0% H2SO4 (0,20% hemicellulose, 68,82% to 25,33% cellulose and lignin) were evaluated for each enzymatic obtained. Compared to others, the enzymes produced by P. sanguineus incubated in sugarcane bagasse showed better efficiency in getting glucose with an average grade of 0,14 g-L. Although low levels of glucose determined in this work, in relation to the literature, it can be stated that the enzymes laccase, manganese peroxidase and lignin peroxidase, demonstrated good hydrolytic potential, especially for those produced by the fungus P. sanguineus.
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Correia, Tiago Pereira da Silva [UNESP]. "Deposição e qualidade de sementes de sorgo utilizando um mecanismo dosador de fluxo contínuo." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/90722.
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correia_tps_me_botfca.pdf: 505653 bytes, checksum: 7f4cab535edd45af40fd0c7c4750339f (MD5)Uma opção para a semeadura correta da cultura do sorgo é com o uso de semeadoras-adubadoras de fluxo contínuo. Com estas máquinas é possível realizar a regulagem da deposição e distribuição de sementes, e o conhecimento do seu desempenho nas mais diversas condições de trabalho. Existem condições com declives plano e ondulado, desta maneira a deposição das sementes por semeadoras-adubadoras de fluxo-contínuo podem ser prejudicadas. Sendo assim, o objetivo deste trabalho foi avaliar em simulador o comportamento da deposição de sementes por um mecanismo dosador de fluxo contínuo em condições distintas de relevo do terreno, velocidade de semeadura e quantidade de sementes no reservatório, assim como avaliar a qualidade das sementes depositadas. O trabalho foi realizado em duas etapas, na Fundação Agrária de Pesquisa Agropecuária – (FAPA) e na Faculdade de Ciências Agronômicas da UNESP de Botucatu – SP. A primeira etapa foi a coleta de sementes no simulador utilizando um mecanismo dosador do tipo rotor acanalado helicoidal de fluxo contínuo operando transversalmente ao declive, e a segunda foi a realização das análises de qualidade das sementes coletadas na primeira etapa. O delineamento experimental do ensaio foi avaliado em esquema fatorial simples trabalhando-se com três fatores (três relevos x três velocidade; três relevos x três nível do reservatório de sementes; e três velocidade x três nível do reservatório de sementes). As análises estatísticas foram realizadas utilizando o programa SAS, sendo os dados submetidos ao teste de Tukey e as médias comparadas pelo teste F ao nível de 5 % de significância. Os resultados obtidos mostraram que a elevação da velocidade de trabalho reduz a deposição de sementes no relevo com 3%. Os relevos com 8% e 16% propiciam redução...
One option for sowing and correct plantability of sorghum is using seeder streaming. With these machines it is possible to perform precise adjustment of the deposition and distribution of seeds and knowledge of its performance in various conditions. In various national regions producing sorghum, there are conditions with steep slopes, thus the plantability seed by seeder-continuous flow may be impaired. Thus, the aim of this study was to evaluate the behavior of the simulator seed deposition by a continuous flow metering system in different conditions of slope, seeding speed and level of the reservoir, as well as assess the quality of seeds deposited. The study was conducted in two stages, the Agrarian Foundation for Agricultural Research - (FAPA) and the Faculty of Agricultural Sciences, UNESP, Botucatu– SP. The first step was the simulation of a seeder streaming operating across the slope, and the second was the analyzes of quality seeds collected in the first stage. The experimental test was being evaluated in randomized factorial design simple by working with three parts (three x three-speed slope, three x three slope reservoir level seed and three x three slope reservoir level seed).Statistical analyzes were performed using SAS software, the data being tested for Tukey and means were compared by F test at 5% level of significance. The results showed that the increase in operating speed reduces the deposition of seeds in the flat slope. The gentle slopes and undulating wavy provide reduction of seed deposition. The deposition rate was achieved more precisely seeds with a slope up and the working speed of 4 km h-1, and the lowest... (Complete abstract click electronic access below)
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Godoy, Wagner Lopes de [UNESP]. "Efeito da temperatura de pré-aquecimento e características do pulso na microestrutura de aço estrutural de alta resistência e baixa liga soldado com arco elétrico e proteção gasosa." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/90822.
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godoy_wl_me_bauru.pdf: 10498563 bytes, checksum: a471999a6640d177cb8963731e9bafe8 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A identificação e a qualificação dos constituintes microestruturais de uma junta soldada são de grande importância pela relação que existe entre a microestrutura do cordão e as propriedades mecânicas, particularmente a tenacidade. Trabalhando com variações nos parâmetros de pulso, corrente de pico e tempo de pico, e também na temperatura de pré-aquecimento, foram quantificados os constituintes ferrita acicular e microfases presentes no metal de solda; sendo ambos considerados controladores da tenacidade. Os resultados deste trabalho demonstraram que aumentou a quantidade de ferrita acicular para os menores níveis dos parâmetros de pulso e da temperatura de pré-aquecimento. Quanto às microfases, ocorreu uma redução na quantidade à medida que se elevaram os níveis dos parâmetros de pulso e da temperatura de pré-aquecimento. Observou-se, também, qual foi a influência da velocidade de resfriamento na microestrutura final do metal de solda. Foi utilizado o processo de soldagem a arco elétrico com proteção gasosa, no modo pulsado e arame tubular. A soldagem foi realizada em chapa de aço estrutural de alta resistência e baixa liga (COS-AR 50), com chanfro em X e ângulo de 30º. Como metal de adição foi utilizado o arame tubular de fluxo metálico E70C-6M, com diâmetro de 1,2 mm.
The identification and qualification of the microstructural constituents present in the welded joint are very important for the relationship between the microstructure of the weld beads with the mechanical properties, particularly toughness. Working with variations of pulse parameters, peak current and peak time, and also preheating temperature, had been quantified the constituents acicular ferrite and microphases present in weld metal; being both considered controllers of toughness. The results of this work demostrated that greater amounts of acicular ferrite had been occurred in the lowest levels of pulse parameters and preheating temperature. As for microphases, it has a reduction of the amount with the increase of pulse parameters and preheating temperature. It was observed, also, the influence of the cooling speed in the final microstructure of the weld metal. The samples were welded by the metal gas arc welding, using pulsed arc and tubular wire. As metal base was used HSLA structural steel plate (COS-AR 50), with X-groove and bevel angle 30º. The addition metal was the tubular metal-cored wire E70C-6M with diameter of 1.2 mm.
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Lippe, Eliza Marcia Oliveira [UNESP]. "O ensino de ciências e deficiência visual: uma investigação das percepções das professoras de ciências e da sala de recursos com relação à inclusão." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/90922.
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lippe_emo_me_bauru.pdf: 560950 bytes, checksum: db7acb2cc164148c412be23199d00529 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A proposta da educação inclusiva do governo estadual baseia-se na adaptação curricular, realizada pela ação de uma equipe multidisciplinar que oferece suporte tanto ao professor da sala comum quanto ao aluno com deficiência, por meio do acompanhamento, do estudo e da pesquisa, de modo a incluí-lo e mantê-lo na rede comum de ensino em todos os seus níveis. Essa proposta está amparada em preceitos que consideram o indivíduo como dependente das relações sociais, a escola se configura como uma das instâncias responsáveis para que isso ocorra, constituindo-se como um espaço de convivência social (SEESP/MEC, 2004). O presente estudo tem como objetivo investigar quais as percepções das professoras de ciências e da sala de recursos em deficiência visual com relação à inclusão, mediante a observação da prática docente na presença de alunos inclusos na sala de aula regualr. A pesquisa e análise de dados foram realizadas por meio da metodologia de pesquisa qualitativa e análise textual discursiva. Os resultados obtidos demonstram a importância da comunicação que deve ocorrer entre as professoras para que os alunos possam efetivamente aprender os conteúdos científicos, e também que o professor especialista infelizmente pelo excesso de atividade em sua jornada diária acaba por às vezes negligenciar o processo educativo com os alunos, consentindo que muitas vezes aconteça por muitas ocasiões o reforço e não o apoio pedagógico necessário para auxiliar os alunos
The government's proposal that of inclusive education is based on curriculum adaptation, perfomed by the action of a multidisciplinary team that supports both the teacher and the commom room for students with disabilities, through monitoring, study and research order to include it and keep it on the commom network of education at all levels. Backed by precepts that consider the individual as dependent on social relations, the school should be seen as one of the bodies responsabile for this to occur, constituting a space of social interaction (SEESP/MEC, 2004). This study aims to investigate the perceptions of science teachers and classroom resources on visual impairment in relation to inclusion by the observation of teaching pratice in the presence of students included in the room classroom. The research and data analysis was perfomed to the methodology of qualitative research and discourse textual analysis. The results demonstrate the importance of communication that must occur between the teacher so that students can effectively learn the scientific content, and also that the specialist teachers unfortunately by too much activity in your daily journey ends up sometimes overlook the educational process with students, enabling that often happens in many occasions to strengthen, not pedagogical support needed to hel students
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Kernan, Riana Larissa. "Denitrification in a best management practice bioretention system." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90022.
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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 37-38).
This study investigates the occurrence of denitrifying soil bacteria in a bioretention system located in Singapore and containing a saturated anoxic zone intended to facilitate denitrification. Soil samples were collected from six depths within the rain garden, four of which were within the saturated anoxic zone. These samples were analyzed using endpoint PCR, targeting total bacterial 16S rRNA or a denitrification gene (nosZ) in order to determine presence or absence of denitrifying bacteria. Three dilutions were used to produce semiquantitative results for the abundance of denitrifying bacteria in a sample relative to samples from other depths. The highest numbers of nosZ amplicons per gram of soil were observed in the deeper levels of the saturated anoxic zone as well as within the root zone of the rain garden. Subsurface water samples from the saturated anoxic zone were also analyzed for oxidation-reduction potential, dissolved oxygen, and nitrogen and phosphorus species. Concentrations of nitrate and nitrite were below the detection limit for most samples, indicating consumption by denitrifying bacteria and high rates of removal for long detention times. Ammonia and phosphorus concentrations are of potential concern because they appear to increase within the saturated anoxic zone.
by Riana Larissa Kernan.
M. Eng.
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Forsythe, Eliza C. (Eliza Carla). "Hiring, recessions, and careers : three essays in personnel economics." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90122.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Economics, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 100-103).
Workers find wage-growth and job-satisfaction by building careers. However a worker's ability to string together a sequence of jobs relies on the availability of appropriate opportunities either within their current firm or in other firms in the market. In this thesis, I investigate how variation in the labor market affects this career building process. In the first chapter, I find that career opportunities are scarce for young workers during recessions, and use theory and evidence to argue that this is due to firms choosing to hire more experienced workers instead. In the second chapter, I find that firms reallocate their employees between occupations during recessions, leading workers to receive lower wages and be employed in lower-quality occupations. In the third chapter, I develop a model to explain why workers change firms when opportunities exist within the firm. I show that heterogeneity in firms' production functions and human capital acquisition are sufficient to generate these movements. More specifically, in the first two chapters I use data from the CPS to study reallocations over the business cycle. In Chapter 1, I find that during recessions the probability of being hired falls for young workers, while for experienced workers it rises. I develop a model and show this fact can be explained by firms choosing to hire workers with greater work experience when labor markets are slack. My model provides the distinctive prediction that during recessions, young workers will match with lower-quality jobs and receive lower wages while experienced workers will exhibit no change in either dimension. I develop occupational quality indices using O*NET and OES data and find evidence consistent with both predictions, suggesting that firms' hiring behavior actively contributes to negative outcomes for young workers during recessions. In Chapter 2, I document that occupational mobility is counter-cyclical. I show this is driven by an increase in occupational mobility within firms. I show that these within-firm occupation changers lose ground during recessions, matching with lower-quality jobs and receiving lower wages. Combined with the recessionary increase in within-firm mobility, these results suggest a previously undiscovered cost of recessions borne by employed workers. Finally, in Chapter 3, I develop a model that demonstrates how career-advancing inter-firm mobility can persist despite the possibility of within-firm mobility. I argue that many of these movements are driven by firm heterogeneity and human capital acquisition and show such a model can capture three key empirical regularities: experienced workers are hired into advanced positions, wages rise more at movements between positions (within and between firms) than at stays in the current firm, and external hires tend to have different qualifications than internal promotees. JEL Classification: E24, J62, M51.
by Eliza C. Forsythe.
Ph. D.
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Merchán, Higuera Francisca. "Design of a best-practice start-up accelerator for the Granada Health Technology Park." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90222.
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Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (page 64).
Accelerators are ecosystem catalyzers introduced in 2005 by Y-Combinator. They are time-bounded programs to facilitate core resources for entrepreneurs (mentors, capital, training), with the goal of making the trial-and-error innovation process faster and more efficient. Accelerators are schools of entrepreneurship and, often, a certificate of quality. The province of Granada generates more than 3.46% of Spain's scientific production; however, it contributes with only 1.4% to the domestic GDP (year 2011). A well-designed startup accelerator can help close the gap between the innovation capacity and the economic impact on the region by fostering a vibrant ecosystem of innovation-driven entrepreneurs. Our research examines the idiosyncratic needs of the entrepreneurial ecosystem in Granada, because this understanding is crucial to address the local limitations. In parallel, we studied a diverse typology of accelerators (e.g., selected Health based accelerators in the US and Spanish accelerators) and created an exhaustive benchmark analysis across them. Finally, we proposed a "best-practice" accelerator for the PTS Granada, including choices such as the value proposition, the intake process, the program duration, the amount of seed capital, the role of mentors, and the nature of sponsors. We determined that an accelerator may be non sufficient for emergent entrepreneurial ecosystems. For those cases, we offer additional recommendations to improve the pre- and post-acceleration phases.
by Francisca Merchán Higuera.
M.B.A.
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Rajwani, Shakeel. "Benefits and applications of commonality and platforming in the oil and gas industry." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90722.
Abstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 73-74).
Platforming, the sharing of parts, processes, knowledge, and technologies, across products and projects has proven to be an effective way for firms to reduce their costs. While platforming is now common in many consumer and industrial products, the use of platforms is a relatively new practice in the design of civil and industrial projects such as buildings, power grids, and oil and gas facilities. The research in this thesis was specifically undertaking to examine the use of platforming and commonality in the oil and gas industry. The first objective of this thesis was to understand which platforming benefits were applicable to oil and gas, and to discover the extent of the platform benefits. This was accomplished by studying commonality on an oil and gas project, codenamed Steambird, at an unconventional oil company over a period of 10 months. The secondary objective was to propose a framework for commonality and platforming applicable to oil and gas based on the findings from the Steambird case study. Significant commonality benefits were found in the case study, including a 35% reduction in engineering effort, faster production ramp-up, and a reduction in operational sparing requirements. However, these benefits were relatively modest, only totaling about 10% of the overall project cost. Greater benefits would have likely have been possible but not realized due to organizational factors. The cost structure of the project, dominated by construction and third party procurements, also reduced the potential for commonality benefits. An alternative platform approach to commonality is suggested for future development of the Steambird project. The proposed platform includes 3 well pad variant designs with 6, 9, and 12 wells for low, medium, and high production. A development strategy using the suggested variants was shown to have lower costs than Steambirds current strategy even under conservative assumptions. Finally, the platform strategy proposed for Steambird is generalized to oil and gas development in general.
by Shakeel Rajwani.
S.M. in Engineering and Management
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Ruppert, Lídia Alice Soares. "Ensaios sobre o investimento direto externo : os casos das empresas espanholas e coreanas /." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/90022.
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Orientador: Mário Augusto BertellaBanca: André Luiz Correa
Banca: Roseli da Silva
Resumo: Este trabalho tem o objetivo de analisar o processo de internacionalização via investimento direto externo (IDE) das empresas espanholas e coreanas a partir dos anos 90. Para isso, será feita uma revisão das abordagens não convencionais da lógica do investimento direto externo e de seus condicionantes. Ademais, serão tratadas as mudanças nos ambientes macroeconômicos e institucionais desde o pós-guerra e seus impactos sobre as estratégias de concorrência das corporações e dos movimentos de IDE. É a partir deste mapeamento global do IDE que se dará o estudo dos determinantes, das características e da evolução do investimento direto externo das empresas espanholas e coreanas nas décadas de 1990 e 2000
Abstract: This dissertation aims to analyze the internationalization process through foreign direct investment (FDI) of Spanish and Korean companies since the 90's. For that, it will be made a review of unconventional approaches about the logic of foreign direct investment and its limitations. Moreover, it will be explicited the changes in macroeconomic and institutional environments in the post-war and its impact on the competitive strategies of corporations and FDI flows. It is from this FDI global mapping that it will be studied the determinants, characteristics and evolution of foreign direct investment of Spanish companies and Korea in the past two decades
Mestre
21
Rabonato, Aline Cristina 1985. "Linhagens fúngicas na hidrólise enzimática de bagaço de cana-de-açúcar /." Botucatu :, 2013. http://hdl.handle.net/11449/90622.
Abstract:
Orientador: Marli Teixeira de Almeida MinhoniBanca: Maria Cristina Teixeira Duarte
Banca: Meire Cristina Nogeura de Andrade
Resumo: A produção de bioetanol e de açucares a partir do caldo de cana gera como um dos subprodutos, o bagaço. Atualmente, esse último, uma biomassa industrial lignocelulósica, pode ser aproveitado para produção de etanol de segunda geração, desde que previamente submetido a processos hidrolíticos para gerar açúcares fermentescíveis. O objetivo deste trabalho foi estimar a produção de bioetanol a partir desta biomassa agroindustrial. Para tanto, foram utilizados os cogumelos Lentinula edodes, Pleurotus ostreatus, Pleurotus eryngii e Pycnoporus sanguineus como potenciais fontes produtoras das enzimas lacase, manganês peroxidase e lignina peroxidase, capazes de hidrolisar o bagaço de cana-de-açúcar. As maiores atividades enzimática observadas para L. edodes, P. ostreatus, P. sanguineus e P. eryngii para lacase foram de 39,23 U-mL ao 25º dia de incubação, 2,5 U-mL e 80 U-mL ao 27º dia de incubação, e 16,45 U-mL ao 15º dia, respectivamente. As enzimas MnP e LiP não apresentaram resultados expressivos. A hidrólise enzimática do bagaço de cana in natura (32,17% de hemicelulose, 52,45% de celulose e 10,62% de lignina) e o bagaço de cana hidrolisado com H2SO4 7,0% (0,20% de hemicelulose, 68,82% de celulose e 25,33% de lignina) foram avaliados para cada conjunto enzimático obtido. Comparado aos demais, as enzimas produzidas pelo P. sanguineus incubado em bagaço in natura apresentaram uma melhor eficiência na conversão dos açúcares, com teor médio de 0,14 g-L de glicose. Embora os baixos teores de glicose determinada nesse trabalho, em relação com a literatura, pode-se afirmar que as enzimas lacase, manganês peroxidase e lignina peroxidase, demonstraram ter potencial hidrolítico, principalmente para as produzidas pelo fungo P. sanguineus
Abstract: The production of ethanol and sugar from sugarcane juice bagasse is generate byproduct. Currently, the bagasse, an industrial lignocellulosic biomass can be used for production of second generation ethanol, since when submitted to hydrolytic processes generate fermentable sugars. The objective of this study was to estimate the production of bioethanol from this agro biomass. Lentinula edodes, Pleurotus ostreatus, Pleurotus eryngii and Pycnoporus sanguineus were used as potential sources producing enzymes laccase, manganese peroxidase and lignin peroxidase, capable of hydrolyzing the sugarcane bagasse. The highest activity of enzymes, observed for L. edodes, P. ostreatus, P. sanguineus and P. eryngii were to 39.23 U-mL laccase after 25 days of incubation, 2,5 U-mL and 80 U-mL after 27 days of incubation, and 16,45 U-mL on 15 day, respectively. MnP and LiP showed no significant results. The enzymatic hydrolysis of sugarcane bagasse in natura (32,17% hemicellulose, cellulose 52,45% and 10,62% lignin) and bagasse hydrolyzate with 7,0% H2SO4 (0,20% hemicellulose, 68,82% to 25,33% cellulose and lignin) were evaluated for each enzymatic obtained. Compared to others, the enzymes produced by P. sanguineus incubated in sugarcane bagasse showed better efficiency in getting glucose with an average grade of 0,14 g-L. Although low levels of glucose determined in this work, in relation to the literature, it can be stated that the enzymes laccase, manganese peroxidase and lignin peroxidase, demonstrated good hydrolytic potential, especially for those produced by the fungus P. sanguineus.
Mestre
22
Correia, Tiago Pereira da Silva 1986. "Deposição e qualidade de sementes de sorgo utilizando um mecanismo dosador de fluxo contínuo /." Botucatu :, 2013. http://hdl.handle.net/11449/90722.
Abstract:
Orientador: Carlos Antonio GameroCoorientador: Paulo Roberto Arbex Silva
Banca: Kléber Pereira Lanças
Banca: Carlos Eduardo Angeli Furlani
Resumo: Uma opção para a semeadura correta da cultura do sorgo é com o uso de semeadoras-adubadoras de fluxo contínuo. Com estas máquinas é possível realizar a regulagem da deposição e distribuição de sementes, e o conhecimento do seu desempenho nas mais diversas condições de trabalho. Existem condições com declives plano e ondulado, desta maneira a deposição das sementes por semeadoras-adubadoras de fluxo-contínuo podem ser prejudicadas. Sendo assim, o objetivo deste trabalho foi avaliar em simulador o comportamento da deposição de sementes por um mecanismo dosador de fluxo contínuo em condições distintas de relevo do terreno, velocidade de semeadura e quantidade de sementes no reservatório, assim como avaliar a qualidade das sementes depositadas. O trabalho foi realizado em duas etapas, na Fundação Agrária de Pesquisa Agropecuária - (FAPA) e na Faculdade de Ciências Agronômicas da UNESP de Botucatu - SP. A primeira etapa foi a coleta de sementes no simulador utilizando um mecanismo dosador do tipo rotor acanalado helicoidal de fluxo contínuo operando transversalmente ao declive, e a segunda foi a realização das análises de qualidade das sementes coletadas na primeira etapa. O delineamento experimental do ensaio foi avaliado em esquema fatorial simples trabalhando-se com três fatores (três relevos x três velocidade; três relevos x três nível do reservatório de sementes; e três velocidade x três nível do reservatório de sementes). As análises estatísticas foram realizadas utilizando o programa SAS, sendo os dados submetidos ao teste de Tukey e as médias comparadas pelo teste F ao nível de 5 % de significância. Os resultados obtidos mostraram que a elevação da velocidade de trabalho reduz a deposição de sementes no relevo com 3%. Os relevos com 8% e 16% propiciam redução... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: One option for sowing and correct plantability of sorghum is using seeder streaming. With these machines it is possible to perform precise adjustment of the deposition and distribution of seeds and knowledge of its performance in various conditions. In various national regions producing sorghum, there are conditions with steep slopes, thus the plantability seed by seeder-continuous flow may be impaired. Thus, the aim of this study was to evaluate the behavior of the simulator seed deposition by a continuous flow metering system in different conditions of slope, seeding speed and level of the reservoir, as well as assess the quality of seeds deposited. The study was conducted in two stages, the Agrarian Foundation for Agricultural Research - (FAPA) and the Faculty of Agricultural Sciences, UNESP, Botucatu- SP. The first step was the simulation of a seeder streaming operating across the slope, and the second was the analyzes of quality seeds collected in the first stage. The experimental test was being evaluated in randomized factorial design simple by working with three parts (three x three-speed slope, three x three slope reservoir level seed and three x three slope reservoir level seed).Statistical analyzes were performed using SAS software, the data being tested for Tukey and means were compared by F test at 5% level of significance. The results showed that the increase in operating speed reduces the deposition of seeds in the flat slope. The gentle slopes and undulating wavy provide reduction of seed deposition. The deposition rate was achieved more precisely seeds with a slope up and the working speed of 4 km h-1, and the lowest... (Complete abstract click electronic access below)
Mestre
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Brunelli, Luciana Trevisan 1986. "Produção de cerveja com mel : características físico-químicas, energética e sensorial /." Botucatu : [s.n.], 2012. http://hdl.handle.net/11449/90522.
Abstract:
Orientador: Waldemar Gastoni Venturini FilhoBanca: Magali Leonel
Banca: Muris Sleiman
Resumo: O objetivo do presente trabalho foi produzir e caracterizar físico-quimicamente, energeticamente e sensorialmente cervejas elaboradas com mel.. Os ensaios de produção de cerveja foram feitos com nove tratamentos, combinação de três concentrações de extrato original no mosto (11, 13 e 15 °Brix) e três porcentagens de mel na formulação do mosto (0, 20 e 40%). O experimento foi inteiramente casualizado com duas repetições, perfazendo dezoito parcelas experimentais. A mosturação foi realizada pelo processo de infusão. O mel foi adicionado na etapa de fervura. Depois de clarificado, o mosto teve seu teor de extrato corrigido e foi inoculado com levedura de baixa fermentação. A fermentação ocorreu a 10 °C. A cerveja foi engarrafada manualmente e armazenadas em freezer à temperatura de 0 °C por 15 dias. As cervejas foram analisadas físico-quimicamente, além da quantificação dos valores energéticos. A análise sensorial foi realizada por meio do teste de escala hedônica estruturada de nove pontos. A presença de mel como matéria prima cervejeira aumenta a fermentabilidade dos mostos e das cervejas, além de favorecer a formação de CO2 e elevar a densidade de espuma e total de espuma nas cervejas. Além disso, o mel diminui os teores de acidez total, de amargor e de turbidez, promovendo uma melhor clarificação na cerveja, em relação às cervejas puro malte. Todas as cervejas foram consideradas claras, pois a intensidade de cor está abaixo de 20 EBC. As cervejas comuns apresentaram os menores valores energéticos em relação às cervejas fortes e as extras. A cerveja forte elaborada sem o mel na formulação apresentou o maior valor energético. Os teores de álcool, dextrina e proteína foram predominantes nos valores energéticos das cervejas. Todas as cervejas elaboradas... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The objective of this study was to produce and characterize physico-chemically, energetically and sensory beer made with honey. The tests of beer production were made with nine treatments, three combination of the original extract concentrations in the wort (11, 13 and 15 ° Brix) and three percentages of honey in the wort formulation (0, 20 and 40%). The experiment was completely randomized with two replications, totaling eighteen plots. The mashing process was performed by infusion. The honey was added in the boiling step. After clarified, the wort had it extract contents corrected and was inoculated with low fermentation yeast. The fermentation occurred at 10 ° C. The beer was manually bottled and stored in a freezer at the temperature of 0 °C for 15 days. The beers were physico-chemically analyzed, beyond the energy values quantification. Sensory analysis was performed by means of the nine-points hedonic scale. The presence of honey as an beer increases the the musts and beers fermentability, besides encourage the CO2 formation and increasing the foam density and total foam in beers. In addition, honey decreases the total acidity levels, bitterness and turbidity, promoting a better beer clarification, regarding to pure malt beers. All beers were considered clear, since the... (Complete abstract click electronic access below)
Mestre
24
Cervi, Devanir de Araújo. "Avaliação da infiltração apical, pós tratamento de canais radiculares, utilizando 4 diferentes técnicas combinadas de instrumentação rotatória e obturação por termoplastificação. Estudo "in vitro" /." Araraquara : [s.n.], 2002. http://hdl.handle.net/11449/90422.
Abstract:
Orientador: Léa Assed Bezerra da SilvaBanca: Mario Roberto Leonardo
Banca: Jesus Djalma Pécora
Resumo: Foram utilizados 115 dentes pré molares inferiores de humanos, que foram divididos em 5 grupos de 16 dentes cada; sendo 5 grupos com 5 dentes cada, utilizados como controle positivo e, 5 grupos de 2 dentes como controle negativo. Em todos os dentes após a abertura coronária, foi realizado o desbridamento foraminal com uma lima tipo Kerr no 15 até 1mm além do forame apical e o preparo biomecânico a 1mm aquém comprimento real do dente. Foram utilizados para a instrumentação dos canais radiculares, os sistemas de limas rotatórias de níquel titânio ProFile 0.4/.06 e Quantec, e a técnica Clássica Modificada; sendo o batente apical preparado até a lima 45 de cada técnica de instrumentação. A cada troca de lima, foi utilizado o hipoclorito de sódio à 1% como solução irrigadora. Posteriormente os dentes foram obturados pelos sistemas de guta-percha termoplastificada Thermafil, Microseal e pela técnica da Condensação Lateral Ativa; utilizando como cimento obturador; AH Plus. Após as obturações os dentes foram impermeabilizados com esmalte de unha, exceto, o 1mm ao redor do forame apical; imersos no corante de azul de metileno à 2% sob vácuo e fraturados de maneira a serem obtidas duas hemi-partes. A penetração do corante foi medida com auxílio de um perfilômetro, e os dados, após análise estatística mostraram que, o grupo de dentes instrumentados pelo sistema ProFile 0.4/.06 e obturados com o sistema Thermafil, apresentaram menor infiltração apical, quando comparado com os demais grupos.
Abstract: It was evaluated 115 mandibular premolars of humans, that were divided in 5 groups of 16 teeth each; 5 groups with 5 teeth each, used as positive control and 5 groups of 2 teeth as negative control. After coronary acess, the apical patency was accomplished with a file type Kerr no 15 up to 1mm after the apical foramen and prepared to 1mm short of working length. Instrumentation wasdone, using ProFile 0,04 and 0,06 and Quantec, stotary files and the Modified Classic technique; The apical preparation used a file 45 as memory file. After each file change, sodium hypochlorite was used at 1% as irrigation solution. The teeth were filled using systems of thermoplasticized gutta-percha Thermafil, Microseal and the technique of the Active Lateral Condensation. The sealer used was the AH Plus root canal sealer. After obturation the teeth were waterproof with fingernail enamel, except, the 1mm short of the apical foramen; immerged in the coloring of methylene blue at 2% under vacuum and fractured in a way where it was obtained two hemi-parts. The penetration of the coloring was measured with aid of a Nikon Profile Projector, and the data, after statistical analysis showed that, the group of teeth under the system ProFile 0,04 and 0,06 and filled with the system Thermafil, presented lower leakage apical, when compared with other groups.
Mestre
25
Archangelo, Rosemeire Marques Ribeiro. "Sanção expiatória versus sanção por reciprocidade : estudo exploratório em dez classes de educação infantil. -." Rio Claro : [s.n.], 2010. http://hdl.handle.net/11449/90122.
Abstract:
Orientador: Áurea Maria de OliveiraBanca: Orly Zucatto Mantovani de Assis
Banca: Telma Pileggi Vinha
Resumo: A legislação, nacional, foi palco da normatização da punição durante séculos e, as pesquisas demonstraram que a ausência de subsídios teóricos sobre a temática faz com que o docente, na atualidade, paute-se no senso comum e transfiram para a família e à legislação, a culpa pela lacuna em sua formação de base. Inúmeros casos de agressão dentro do ambiente escolar, publicados na mídia mostram que estamos vivendo um momento delicado o qual demanda mudanças radicais na concepção de educação e mesmo na organização da ação pedagógica. Nesse sentido, os cursos de formação continuada constituem-se enquanto um dos recursos para a melhoria da ação pedagógica trabalhando com os subsídios teóricos necessários à essa transformação. Iniciamos nossa pesquisa a partir da hipótese de que o docente, egresso de cursos de formação continuada sobre a temática da moralidade, no momento em que fosse necessário aplicar uma sanção esta seria por reciprocidade e não expiatória. Selecionamos três municípios, seis escolas e dez salas de aula, nas quais realizamos 200 horas de observação. Os dados demonstraram diferenças qualitativas nos ambientes estudados no que se refere a organização do espaço visando a operacionalização de uma ação pedagógica nos princípios da democracia, todavia, nos quesitos regras, cobrança das regras e sanção, os sujeitos dessa pesquisa recorreram ao uso da sanção expiatória em detrimento da sanção por reciprocidade. Esse estudo apontou para a necessidade de modificar dinâmica da formação continuada, que deve ser de alto nível, integrando teoria-prática no processo de ação, reflexão, inclusão de novos desafios, reflexão, ação. Com formações pontuais, locais, dentro do contexto das unidades... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The legislation, national stage was the normalization of punishment for centuries, and research has shown that the absence of theoretical support on the issue makes the teacher, in actuality, is guided by common sense and transfer to the family and the law the blame for the gap in their basic training. Many cases of aggression within the school environment, published in the media show that we are living a delicate moment which demand radical changes in the conception of education and even the organization of pedagogical action. In this sense, continuing education courses constitute themselves as a resource for improving the pedagogical action working with the theoretical support needed for this transformation. We began our search from the assumption that the teacher and egress of continuing education courses on the topic of morality, when it was necessary to impose a penalty for this would be reciprocal and not scapegoated. Selected three districts, six schools and ten classrooms, in which we conducted 200 hours of observation. The data showed qualitative differences in the study regarding the organization of space aimed at the operationalization of a pedagogical action the principles of democracy, however, questions the rules, billing rules and penalties, the subjects of this study resorted to the use of expiatory instead of punishment by reciprocity. This study pointed to the need to change the dynamics of continuing education, which should be high level, integrating theory and practice in the process of action, reflection, adding new challenges, reflection, action. With ad hoc formations, locations, within the context of school units, involving all professionals
Mestre
26
Parra, Sánchez Aldo Iván. "Etnomatemática e educação própria /." Rio Claro, 2011. http://hdl.handle.net/11449/90222.
Abstract:
Acompanha DVD com fotos e vídeosOrientador: Pedro Paulo Scandiuzzi
Banca: Ole Skovsmose
Banca: Alexandrina Monteiro
Resumo: Este trabalho desenvolve uma experiência de cunho etnográfico em três diferentes comunidades do povo indígena Nasa, localizadas no estado de Cauca na Colômbia, onde se fez um acompanhamento aos processos educativos e escolares das comunidades, o que permitiu identificar a presença de diferentes tipos de educação indígena, e conseguir reportar alguns aspectos do semeado de milho, que é uma pratica agrícola ancestral desse povo, e que pode ser considerada como uma pratica ritual, educativa e matemática. A análise do trabalho de pretende elucidar relações entre a proposta educativa que esse povo tem desenvolvido desde 1978, chamada de Educação Própria, e uma particular linha de pesquisa na Etnomatemática, que focaliza o estudo das influencias dos mitos e rituais nos saberes e fazeres dos grupos culturais. Foram encontradas relações de convergência, diferenças de ênfase e até contradições entre os dois referenciais teóricos. Finalmente se levantam possibilidades de complementaridade entre os dois enfoques
Abstract: This research develops an ethnographic experience in three different communities of Nasa indigenous people, located in the state of Cauca, Colombia. There was an accompaniment to the educational and scholar process in these communities, which identified the presence of different types of indigenous education and reported some aspects of the corn planting, which is an ancient agricultural practice of the Nasa people, that can be regarded as a ritual, educational and mathematical practice. Work's analysis aims to elucidate relationships between the educational proposal that Nasa people have developed since 1978, called Proper- Education, and a particular line of research in ethnomathematics, which focuses on the study of the influence of myths and rituals in the knowledge and actions of cultural groups.There were found converge relationships , differences of emphasis and even contradictions between the two considered theoretical frameworks . Finally, it looms the possibility of complementarity between the two approaches
Mestre
27
Petroni, Ester Tereza Senger. "Perfil pessoal e profissional de professores do ensino fundamental e médio : uma investigação com profissionais pertencentes à diretoria de ensino de Jaú-SP /." Araraquara, 2007. http://hdl.handle.net/11449/90322.
Abstract:
Orientador: Edson do Carmo InforsatoBanca: Marisa Aparecida Pereira Santos
Banca: Mauro Carlos Romanatto
Resumo: Investigação científica integrada ao Programa de Educação Escolar - Eixo Temático: Trabalho Educativo; Linha de Pesquisa: Trabalho Docente. Trata-se de um estudo empírico objetivado a traçar o perfil de professores. Participaram deste estudo 100 professores do segundo ciclo do ensino fundamental e ensino médio pertencentes à diretoria de ensino de Jaú bem como de um programa de formação continuada oferecido pelo governo do estado de São Paulo em parceria com uma Universidade Comunitária. O questionário foi constituído de 56 itens agrupados em três categorias: 1. identificação pessoal e profissional; 2. acesso a cultura e atualização profissional; 3. avaliação da profissão e prática docente, sendo aplicado de forma coletiva e em período de aula. Os dados foram analisados à luz da estatística descritiva, utilizando-se como recurso a ferramenta SPSS/ForWindows. Através do método estatístico foi possível descrever os dados obtidos para proporcionar discernimento entre o perfil de professores brasileiros e o da amostra estudada. Os principais achados deste estudo apontam para as seguintes características do perfil do professor: a grande maioria constitui-se de professoras, portanto há uma prevalência absoluta no sexo feminino; a faixa etária desta categoria se concentra entre 26 a 45 anos; o tempo de atuação se situa entre 11 e 20 anos; a grande maioria cursou o ensino fundamental e médio na rede pública e a graduação na rede privada; como o rendimento familiar médio aproximado é de 6 a 10 salários-mínimos, é grande a proporção daqueles que possuem computador em casa. No que diz respeito ao acesso à cultura, os participantes apresentaram uma diversidade de atividades culturais, desde ir ao cinema até o show de rock, com distribuição de freqüência diferentes e marcadas por três índices ir ao cinema... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Scientific investigation integrated to the program on Education - Thematic Focus: Educational Work; Research Focus: Teacher Work. This empirical study aims at tracing teacher's profile. The study involved 100 teachers of elementary school (segment II) and secondary school, who belong to the education bureau of Jaú and who attend a São Paulo state sponsored course of continual formation held in partnership with a regional Community University. The questionnaire was formed by 56 items grouped in three categories: 1. personal and professional identification; 2. access to culture and professional update; and 3. assessment of the profession and of the teaching practice, and it was applied collectively and during classes time. Data were then analyzed in light of descriptive statistic using SPSS/ForWindos, allowing us to describe the data obtained to provide discernment between the Brazilian teachers profile compared to that of the sample under study. The main findings point that: most teachers are female, indicating to an absolute prevalence of women in the area; the more prevalent age range is between 26 and 45 years; the time in service is found between 11 and 20 years; most subjects attended public schools during elementary and secondary education but attended private institutions of higher education; since the approximate average family earnings is of 6to 10 minimal salaries, the proportion of teachers who have a computer at home is high. In terms of access to culture, participants present a diversity of cultural activities such as going to the movies or to rock concerts, watching videos at home, and going to places with live music playing, where the reference was last year. Together with such findings other meaningful data related to reading habits were found. Stimulation to reading in childhood was found to come primarily... (Complete abstract, click electronic access below)
Mestre
28
Chastain, Patrick Alan. "Effects of load proportioning on the capacity of multiple-hole composite joints." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90922.
Abstract:
This study addresses the issue of adjusting the proportion of load transmitted by each hole in a multiplehole joint so that the joint capacity is a maximum. Specifically two-hole-in-series joints are examined. The results indicate that when each hole reacts 50% of the total load, the joint capacity is not a maximum. One hole generally is understressed at joint failure. The algorithm developed to determine the load proportion at each hole which results in maximum capacity is discussed. The algorithm includes two-dimensional finite-element stress analysis and a failure criteria. The algorithm is used to study the effects of joint width, hole spacing, and hole to joint-end distance on load proportioning and capacity. To study hole size effects, two hole diameters are considered. Three laminates are considered: a quasi-isotropic laminate; a cross-ply laminate; and a 45 degree angle-ply laminate. By proportioning the load, capacity can be increased generally from 5 to 10%. In some cases a greater increase is possible.M.S.
29
Stinson, Nicholas Taylor. "Refinement of Surface Combatant Ship Synthesis Model for Network-Based System Design." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/90222.
Abstract:
This thesis describes an adaptable component level machinery system weight and size estimation tool used in the context of a ship distributed system architecture framework and ship synthesis model for naval ship concept design. The system architecture framework decomposes the system of systems into three intersecting architectures: physical, logical, and operational to describe the spatial and functional relationships of the system together with their temporal behavior characteristics. Following an Architecture Flow Optimization (AFO), or energy flow analysis based on this framework, vital components are sized based on their energy flow requirements for application in the ship synthesis model (SSM). Previously, components were sized manually or parametrically. This was not workable for assessing many designs in concept exploration and outdated parametric models based on historical data were not sufficiently applicable to new ship designs. The new methodology presented in this thesis uses the energy flow analysis, baseline component data, and physical limitations to individually calculate sizes and weights for each vital component in a ship power and energy system. The methodology allows for new technologies to be quickly and accurately implemented to assess their overall impact on the design. The optimized flow analysis combined with the component level data creates a higher fidelity design that can be analyzed to assess the impact of various systems and operational cases on the overall design. This thesis describes the SSM, discusses the AFO's contribution, and provides background on the component sizing methodology including the underlying theory, baseline data, energy conversion, and physical assumptions.Master of Science
This thesis describes an adaptable component level machinery system weight and size estimation tool used in the context of a preliminary ship system design and naval ship concept design. The system design decomposes the system of systems into three intersecting areas: physical, logical, and operational to describe the spatial and functional relationships of the system together with their time dependent behavior characteristics. Following an Architecture Flow Optimization (AFO), or energy flow analysis based on this system design, vital components are sized based on their energy flow requirements for application in the ship synthesis model (SSM). Previously, components were sized manually or with estimated equations. This was not workable for assessing many designs in concept exploration and outdated equation models based on historical data were not sufficiently applicable to new ship designs. The new methodology presented in this thesis uses the energy flow analysis, baseline component data, and physical limitations to individually calculate sizes and weights for each vital component in a ship power and energy system. The methodology allows for new technologies to be quickly and accurately implemented to assess their overall impact on the design. The optimized flow analysis combined with the component level data creates a more accurate design that can be analyzed to assess the impact of various systems and operational cases on the overall design. This thesis describes the SSM, discusses the AFO’s contribution, and provides background on the component sizing methodology including the underlying theory, baseline data, energy conversion, and physical assumptions.
30
Monzón, Bello Pablo. "Análisis de la corrosión de las armaduras de acero en el hormigón: generación de monocapa inhibidora sobre la superficie de acero." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/90422.
Abstract:
Corrosion of steel reinforcements is a phenomenon that can greatly reduce the lifespan of any reinforced concrete structure or structural element. The mechanical, functional and aesthetic capacity of the material are negatively affected by the loss of section and adhesion as a consequence of corrosion procceses or by cracks produced in the surrounding matrix due to stresses caused by corrosion products. Therefore, the study of these processes and of the methods that reduce corrosion kinetics are of utmost importance in the field of architecture and engineering.
In the first part of this thesis, new methods for analysing corrosion processes are studied through the joint use of electrochemical techniques and advanced statistics. This combination yields qualitative and quantitative information which is more complete and useful than that obtained by traditional methodologies.
In the second part of the paper, a series of organic amine and carboxylate compounds are selected to act as corrosion inhibitors. Different protocols for the monolayer binding of these compounds to the steel reinforcements are developed, optimised and described, proving their effectiveness after subjecting them to chemical attack in solutions with different mechanisms and levels of aggressiveness.
Next, the effectiveness of the inhibitor coating is studied in reinforcements embedded in mortar and concrete specimens. For that purpose, classic working protocols are used to monitor the corrosion processes.
Lastly, the response of the monolayers to static and dynamic tensile loads applied to the steel rods is analysed, as well as the behaviour and influence of the coatings on the adhesion of the concrete-steel system.La corrosión de las armaduras es un fenómeno que puede reducir en gran medida la vida útil de cualquier estructura o elemento constructivo de hormigón armado. La pérdida de sección y de adherencia como consecuencia de procesos de corrosión, o las fisuras producidas en la matriz envolvente debido a las tensiones generadas por los productos de corrosión, afectan negativamente a la capacidad mecánica, funcional y estética del material. Por tanto, el estudio de dichos procesos y de métodos que permitan reducir la cinética de corrosión, son de suma importancia en el ámbito de la arquitectura y la ingeniería. En la primera parte de esta Tesis se estudia el empleo de nuevos métodos para el ánalisis de los procesos de corrosión, mediante el uso conjunto de técnicas electroquímicas y estadísticas avanzadas. Esta combinación genera una información cualitativa y cuantitativa, que demuestra ser más completa y útil que la obtenida mediante las metodologías tradicionales. En la segunda parte del trabajo se selecciona una serie de compuestos orgánicos tipo amina y carboxilato para que actúen como inhibidores de la corrosión. Con ellos se desarrollan, optimizan y describen diferentes protocolos de fijación de monocapas sobre las armaduras de acero, comprobando su efectividad tras someterlas al ataque químico en disoluciones con diferentes mecanismos y niveles de agresividad. A continuación, se estudia la efectividad del recubrimiento inhibidor en armaduras embebidas en probetas de mortero y hormigón. Para ello, se utilizan los protocolos clásicos de trabajo para el seguimiento de los procesos de corrosión. Finalmente, se prosigue con el análisis de la respuesta de las monocapas bajo cargas estáticas y dinámicas de tracción en las barras, y con la comprobación del comportamiento e influencia de los revestimientos generados sobre la adherencia del sistema hormigón-acero.
La corrosió de les armadures és un fenomen que pot reduir en gran manera la vida útil de qualsevol estructura o element constructiu de formigó armat. La pèrdua de secció i d'adherència com a conseqüència de processos de corrosió, o les fissures produïdes en la matriu envolupant a causa de les tensions generades pels productes de corrosió, afecten negativament a la capacitat mecànica, funcional i estètica del material. Per tant, l'estudi d'aquests processos i de mètodes que permeten reduir la cinètica de corrosió, són de summa importància en l'àmbit de l'arquitectura i l'enginyeria. En la primera part d'aquesta Tesi s'estudia l'ocupació de nous mètodes per a l'anàlisi dels processos de corrosió, mitjançant l'ús conjunt de tècniques electroquímiques i estadístiques avançades. Aquesta combinació genera una informació qualitativa i quantitativa, que demostra ser més completa i útil que l'obtinguda mitjançant les metodologies tradicionals. En la segona part del treball se selecciona una sèrie de compostos orgànics tipus amina i carboxilato perquè actuen com a inhibidors de la corrosió. Amb ells es desenvolupen, optimitzen i descriuen diferents protocols de fixació de monocapes sobre les armadures d'acer, comprovant la seua efectivitat després de sotmetre-les a l'atac químic en dissolucions amb diferents mecanismes i nivells d'agressivitat. A continuació, s'estudia l'efectivitat del recobriment inhibidor en armadures embegudes en provetes de morter i formigó. Per a açò, s'utilitzen els protocols clàssics de treball per al seguiment dels processos de corrosió. Finalment, es prossegueix amb l'anàlisi de la resposta de les monocapes baix càrregues estàtiques i dinàmiques de tracció en les barres, i amb la comprovació del comportament i influència dels revestiments generats sobre l'adherència del sistema formigó-acer.
Monzón Bello, P. (2017). Análisis de la corrosión de las armaduras de acero en el hormigón: generación de monocapa inhibidora sobre la superficie de acero [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/90422
TESIS
31
Rodríguez, Rodríguez Medina Azahara. "Análisis de Sistemas Magnéticos Aplicados a Uniones de Fragmentos." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/90522.
Abstract:
From ancient times, humans have had the need to repair tools with the aim of keeping using them. In the same way, the need for repairing ark work has been present along the History, to return the integrity of the pieces. The repairing procedures have evolved from the antiquity to present time. Following these premises, this doctoral thesis proposes the study and optimization of a joining method of fragments using magnetic systems. In this sense, it is proposed a joining method easy to implement that combines Material Physics and Conservation and Restoration of Sculpture and Ornaments. This method is presented as an alternative to the use of structural adhesives. It is reversible, little invasive and respectful with the original artwork, allowing new intervention criteria, viable in the field of Cultural Heritage. The main obtained result has been the development of a new theoretical model that allows determining the optimal distribution of the magnetic forces in the surface of the joining junction, making possible to stabilize it. In the experimental part of this thesis, the different materials, procedures and instrumental employed, are exposed. The model and results have been applied to real cases. As a main conclusions, the study reveals the viability of the use of magnetic systems in the joining of prosthesis and/or fragments in art pieces.Desde sus orígenes, el hombre ha tenido la necesidad de reparar utensilios con el fin de seguir usándolos. De igual modo, en las obras de arte esta intención de reparar y devolver la integridad a la pieza ha estado presente a lo largo de la Historia. Los procedimientos de reparación han evolucionado desde la Antigüedad hasta nuestros días. A raíz de estas premisas, la tesis doctoral que se presenta, plantea el estudio y la optimización de un método de unión de fragmentos mediante sistemas magnéticos. En este sentido, se propone un método de unión sencillo de usar que combina principios de Física de Materiales con criterios de Conservación y Restauración de Escultura y Ornamentos. Se planea como una alternativa al empleo de adhesivos estructurales, siendo un método reversible, poco invasivo y respetuoso con la obra de arte original, haciendo viable nuevos criterios de intervención en el ámbito del Patrimonio Cultural. El resultado ha sido el desarrollo de un modelo teórico que posibilita la predicción del comportamiento de las uniones y determina la distribución de las fuerzas magnéticas por la superficie de la junta consiguiendo estabilizarlas. En el cuerpo experimental de esta tesis se señalan los diferentes materiales, los procedimientos e instrumental empleados, aportándose unos resultados aplicables sobre casos reales. Las conclusiones fundamentales extraídas ponen de manifiesto la viabilidad del uso de sistemas magnéticos en uniones de prótesis y/o fragmentos en obras de arte.
Des dels seus orígens, l'home ha tingut la necessitat de reparar utensilis amb la finalitat de seguir usant-los. De la mateixa manera, en les obres d'art aquesta intenció de reparar i tornar la integritat a la peça ha estat present al llarg de la Història. Els procediments de reparació han evolucionat des de l'Antiguitat fins als nostres dies. Arran d'aquestes premisses, la tesi doctoral que es presenta, planteja l'estudi i l'optimització d'un mètode d'unió de fragments mitjançant sistemes magnètics. En aquest sentit, es proposa un mètode d'unió senzill d'utilitzar que combina principis de Física de Materials amb criteris de Conservació i Restauració d'Escultura i Ornaments. Es planeja com una alternativa a l'ocupació d'adhesius estructurals, sent un mètode reversible, poc invasiu i respectuós amb l'obra d'art original, fent viable nous criteris d'intervenció en l'àmbit del Patrimoni Cultural. El resultat ha estat el desenvolupament d'un model teòric que possibilita la predicció del comportament de les unions i determina la distribució de les forces magnètiques per la superfície de la junta aconseguint estabilitzar-les. En el cos experimental d'aquesta tesi s'assenyalen els diferents materials, els procediments i l'instrumental emprats, aportant-se uns resultats aplicables sobre casos reals. Les conclusions fonamentals extretes posen de manifest la viabilitat de l'ús dels sistemes magnètics en unions de pròtesis i/o fragments en obres d'art.
Rodríguez Rodríguez, MA. (2017). Análisis de Sistemas Magnéticos Aplicados a Uniones de Fragmentos [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/90522
TESIS
32
Martínez, Casañ David. "Desde el estudio de la taranta, cantiña y bulería de Camarón de la Isla hasta su reinterpretación como propuesta práctica." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/90622.
Abstract:
Abstract
"Desde el estudio de la taranta, cantiña y bulería de Camarón de la Isla hasta su reinterpretación como propuesta práctica". Our present work is based on the study of the musical language of flamenco. The need for this kind of investigation becomes obvious if we look at the fact that, despite being declared a World Heritage by UNESCO in 2010, unlike other urban music forms, flamenco does not yet have a unified theory. The evolutionary process flamenco has undergone in the past 50 years, has integrated different cultures incorporating new musical instruments and harmonic concepts far from traditional flamenco. The overall acceptance of these changes is closely tied to the trajectory of the guitar player Paco de Lucia and the flamenco singer Camarón de la Isla, both key figures for the development and diffusion of contemporary flamenco. These two artists introduced many innovations from which we chose two for our investigation. An openness to other styles and the integration of those styles into the language of flamenco.
From the perspective of our study, the process of joining different musical aesthetics into one single piece is a contribution of significant importance.
What marked the evolution of both artists was, on one hand their personality, and on the other hand, their musical qualities and overcoming obstacles inherent in the communication between the aesthetics of different cultures. This led to the creation of first-rate artistic projects.
This dynamic occurred naturally during the evolution of flamenco music, and also inspired one particular part of our study: The arrangement of a musical project, starting from the process of analytical investigation of the work of Camarón de la Isla.
We had to do previous studies to be able to determine a methodology for this work. Questions like: "what type of investigation is the most adequate for our purposes?" or "what kind of studies do already exist in this field of research and which conclusions can be drawn from them?" made us choose several different approaches for musical research projects and their evolution.
The analysis of the circumstances to originate the composition and performance of the chosen musical pieces, suggested the career of Camarón de la Isla closely be studied. His collaboration with the guitar player Paco de Lucia as well as his approach to other musical styles led us to delve into the existing relationship between flamenco and jazz as well as the link established by a collaboration of musicians from different musical languages.
The musical work that we included in this investigation made it necessary to establish tools for the study of its theoretical aspects. Transcription was used as a starting point and from this point we began our study of the musical components of flamenco, which in turn allowed for the realization and recording of a project based on the implementation of different musical styles.Resumen La línea fundamental de nuestro trabajo titulado "Desde el estudio de la taranta, cantiña y bulería de Camarón de la Isla hasta su reinterpretación como propuesta práctica", se centra en el estudio y la interpretación del lenguaje musical flamenco. El desarrollo de una investigación en esta dirección se hace evidente si observamos que, a pesar de ser declarado Patrimonio de la Humanidad por la UNESCO en 2010, no cuenta con una teoría unificada en un modelo que históricamente se ha repetido en la historiografía de las músicas urbanas. El proceso de evolución que ha tenido la música flamenca en los últimos 50 años le ha llevado a integrar propuestas que incorporan nuevos instrumentos musicales y conceptos armónicos alejados del flamenco tradicional. La aceptación de estos cambios está unida a la trayectoria del guitarrista Paco de Lucía y el cantaor Camarón de la Isla, como referentes esenciales en el desarrollo y la difusión del flamenco contemporáneo. Entre las múltiples contribuciones aportadas por estos artistas, hay dos que se muestran idóneas para nuestra investigación: la apertura hacia otros estilos, y la integración de estos en el lenguaje flamenco. Desde nuestra perspectiva de estudio, la concurrencia en un mismo proyecto de diferentes estéticas supone una aportación de fundamental interés. La especial personalidad, sus cualidades artísticas y el trabajo para la superación de obstáculos en la comunicación entre estéticas de distintas culturas, ha marcado su evolución, y ha llevado a generar proyectos artísticos de primer orden. Estos hechos que se han dado de una forma natural en la evolución de la música flamenca han impulsado el desarrollo de nuestro trabajo, basado en la configuración de un proyecto musical, a partir de un proceso de investigación analítica de las propuestas musicales del cantaor Camarón de la Isla. La necesidad de posicionar nuestro enfoque ha generado una serie de estudios previos. Cuestiones como ¿qué modelo de investigación se adecua más a nuestros propósitos?, o ¿qué experiencias se han elaborado en este sentido? nos han llevado a detallar distintas posiciones sobre la diversidad de factores influyentes, en la elaboración de los trabajos de investigación musical y su evolución. La búsqueda de las circunstancias en que se origina y se interpreta el material musical utilizado, nos ha sugerido el estudio de la trayectoria musical del cantaor. La colaboración musical de este, con el guitarrista Paco de Lucía y su acercamiento a otros estilos, nos ha llevado a profundizar sobre la relación existente entre el flamenco y el jazz, y el vínculo nacido de la colaboración de músicos procedentes de diferentes lenguajes. La interpretación musical incluida en esta investigación genera la necesidad de establecer herramientas para el estudio de los aspectos teóricos, utilizando la transcripción como punto de partida. A partir de esta premisa arranca el análisis de estudio sobre los componentes musicales del flamenco, lo cual permite elaborar el proyecto basado en el encuentro entre diferentes estilos y posteriormente grabarlo.
Resum La línea fonamental del nostre treball amb el títol "Desde el estudio de la taranta, cantiña y bulería de Camarón de la Isla hasta su reinterpretación como propuesta práctica", es centra en l'estudi i la interpretació del llenguatge musical flamenc. La necessitat de desenvolupar una investigació en esta direcció, es fa evident si observem que, malgrat ser declarat Patrimoni de la Humanitat per la UNESCO en 2010, no compta amb una teoria unificada en un model que històricament s'ha repetit en la historiografia de las músiques urbanes. El procés d'evolució que ha tingut la música flamenca en els últims 50 anys, li ha portat a integrar propostes que incorporen nous instruments musicals i conceptes harmònics allunyats del flamenc tradicional. L'acceptació d'aquests canvis està unida a la trajectòria del guitarrista Paco de Lucía i del cantaor Camarón de la Isla, com a referents essencials en el desenvolupament i la difusió del flamenc contemporani. Entre les múltiples contribucions aportades per aquests artistes, hi ha dues que es mostren idònies per a la nostra investigació: l'apertura cap a altres estils, i la integració d'aquests en el llenguatge flamenc. Des de la nostra perspectiva d'estudi, la concurrència en un mateix projecte de diferents estètiques, suposa una aportació de fonamental interès. L'especial personalitat, les seues qualitats artístiques i el treball per a la superació d'obstacles en la comunicació entre estètiques de distintes cultures, ha marcat la seua evolució, i els ha portat a generar projectes artístics de primer ordre. Aquests fets que s'han donat d'una forma natural en l'evolució de la música flamenca, han impulsat el desenvolupament del nostre treball, basat en la configuració d'un projecte musical, a partir de un procés d'investigació analítica de les propostes musicals del cantaor Camarón de la Isla. La necessitat de posicionar el nostre enfocament, ha generat una sèrie d'estudis previs. Qüestions com ¿quin model d' investigació s'adequa més als nostres propòsits?, o ¿quines experiències s'han elaborat en aquest sentit? Ens han portat a detallar distintes posicions sobre la diversitat de factors influents, en l'elaboració dels treballs d'investigació musical i la seua evolució. La recerca de les circumstàncies on s'origina i s'interpreta el material musical utilitzat, ens ha suggerit l'estudi de la trajectòria musical del cantaor. La col·laboració musical d'aquest, amb el guitarrista Paco de Lucía i el seu apropament a altres estils, ens porten a aprofundir sobre la relació existent entre el flamenc i el jazz, i el vincle nascut de la col·laboració de músics procedents de diferents llenguatges. La interpretació musical inclosa en aquesta investigació, genera la necessitat d'establir ferramentes per a l'estudi dels aspectes teòrics, utilitzant la transcripció com a punt de partida. A partir d'aquesta premissa arranca l'anàlisi d'estudi sobre els components musicals del flamenc, cosa que ens permet elaborar el projecte basat en la trobada entre diferents estils i posteriorment gravar-ho.
Martínez Casañ, D. (2017). Desde el estudio de la taranta, cantiña y bulería de Camarón de la Isla hasta su reinterpretación como propuesta práctica [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/90622
TESIS
33
Lippe, Eliza Marcia Oliveira. "O ensino de ciências e deficiência visual : uma investigação das percepções das professoras de ciências e da sala de recursos com relação à inclusão /." Bauru : [s.n.], 2010. http://hdl.handle.net/11449/90922.
Abstract:
Orientador: Eder Pires de CamargoBanca: Luciano Gonsalves Costa
Banca: Luciana Maria Lunardi Campos
Resumo: A proposta da educação inclusiva do governo estadual baseia-se na adaptação curricular, realizada pela ação de uma equipe multidisciplinar que oferece suporte tanto ao professor da sala comum quanto ao aluno com deficiência, por meio do acompanhamento, do estudo e da pesquisa, de modo a incluí-lo e mantê-lo na rede comum de ensino em todos os seus níveis. Essa proposta está amparada em preceitos que consideram o indivíduo como dependente das relações sociais, a escola se configura como uma das instâncias responsáveis para que isso ocorra, constituindo-se como um espaço de convivência social (SEESP/MEC, 2004). O presente estudo tem como objetivo investigar quais as percepções das professoras de ciências e da sala de recursos em deficiência visual com relação à inclusão, mediante a observação da prática docente na presença de alunos inclusos na sala de aula regualr. A pesquisa e análise de dados foram realizadas por meio da metodologia de pesquisa qualitativa e análise textual discursiva. Os resultados obtidos demonstram a importância da comunicação que deve ocorrer entre as professoras para que os alunos possam efetivamente aprender os conteúdos científicos, e também que o professor especialista infelizmente pelo excesso de atividade em sua jornada diária acaba por às vezes negligenciar o processo educativo com os alunos, consentindo que muitas vezes aconteça por muitas ocasiões o reforço e não o apoio pedagógico necessário para auxiliar os alunos
Abstract: The government's proposal that of inclusive education is based on curriculum adaptation, perfomed by the action of a multidisciplinary team that supports both the teacher and the commom room for students with disabilities, through monitoring, study and research order to include it and keep it on the commom network of education at all levels. Backed by precepts that consider the individual as dependent on social relations, the school should be seen as one of the bodies responsabile for this to occur, constituting a space of social interaction (SEESP/MEC, 2004). This study aims to investigate the perceptions of science teachers and classroom resources on visual impairment in relation to inclusion by the observation of teaching pratice in the presence of students included in the room classroom. The research and data analysis was perfomed to the methodology of qualitative research and discourse textual analysis. The results demonstrate the importance of communication that must occur between the teacher so that students can effectively learn the scientific content, and also that the specialist teachers unfortunately by too much activity in your daily journey ends up sometimes overlook the educational process with students, enabling that often happens in many occasions to strengthen, not pedagogical support needed to hel students
Mestre
34
Godoy, Wagner Lopes de. "Efeito da temperatura de pré-aquecimento e características do pulso na microestrutura de aço estrutural de alta resistência e baixa liga soldado com arco elétrico e proteção gasosa /." Bauru : [s.n.], 2008. http://hdl.handle.net/11449/90822.
Abstract:
Orientador: Yukio KobayashiBanca: Carlos Alberto Soufen
Banca: Antônio de Padua Lima Filho
Resumo: A identificação e a qualificação dos constituintes microestruturais de uma junta soldada são de grande importância pela relação que existe entre a microestrutura do cordão e as propriedades mecânicas, particularmente a tenacidade. Trabalhando com variações nos parâmetros de pulso, corrente de pico e tempo de pico, e também na temperatura de pré-aquecimento, foram quantificados os constituintes ferrita acicular e microfases presentes no metal de solda; sendo ambos considerados controladores da tenacidade. Os resultados deste trabalho demonstraram que aumentou a quantidade de ferrita acicular para os menores níveis dos parâmetros de pulso e da temperatura de pré-aquecimento. Quanto às microfases, ocorreu uma redução na quantidade à medida que se elevaram os níveis dos parâmetros de pulso e da temperatura de pré-aquecimento. Observou-se, também, qual foi a influência da velocidade de resfriamento na microestrutura final do metal de solda. Foi utilizado o processo de soldagem a arco elétrico com proteção gasosa, no modo pulsado e arame tubular. A soldagem foi realizada em chapa de aço estrutural de alta resistência e baixa liga (COS-AR 50), com chanfro em "X" e ângulo de 30º. Como metal de adição foi utilizado o arame tubular de fluxo metálico E70C-6M, com diâmetro de 1,2 mm.
Abstract: The identification and qualification of the microstructural constituents present in the welded joint are very important for the relationship between the microstructure of the weld beads with the mechanical properties, particularly toughness. Working with variations of pulse parameters, peak current and peak time, and also preheating temperature, had been quantified the constituents acicular ferrite and microphases present in weld metal; being both considered controllers of toughness. The results of this work demostrated that greater amounts of acicular ferrite had been occurred in the lowest levels of pulse parameters and preheating temperature. As for microphases, it has a reduction of the amount with the increase of pulse parameters and preheating temperature. It was observed, also, the influence of the cooling speed in the final microstructure of the weld metal. The samples were welded by the metal gas arc welding, using pulsed arc and tubular wire. As metal base was used HSLA structural steel plate (COS-AR 50), with "X"-groove and bevel angle 30º. The addition metal was the tubular metal-cored wire "E70C-6M" with diameter of 1.2 mm.
Mestre
35
RAPELLI, GIADA. "BATTITI DEL CUORE: UNA RICERCA DIADICA SU PAZIENTI CON MALATTIE CARDIACHE E I LORO PARTNER." Doctoral thesis, Università Cattolica del Sacro Cuore, 2021. http://hdl.handle.net/10280/90822.
Abstract:
Questa ricerca ha un approccio diadico che coinvolge sia i pazienti con malattie cardiovascolari che il loro partner durante l'ospedalizzazione. Il primo studio indaga l'effetto del coping diadico (DC) sulla soddisfazione coniugale dei partner considerando l'effetto moderatore del distress psicologico dei partner. I risultati mostrano che l'effetto benefico del DC positivo e comune sulla soddisfazione coniugale si verifica quando il distress psicologico dei partner è basso, al contrario il DC negativo diminuisce la soddisfazione coniugale tra coloro che hanno alti livelli di distress psicologico. Il secondo studio si propone di indagare la relazione tra DC, aderenza farmacologica e patient activation. La relazione è mediata dall'autoefficacia per la salute del paziente: il DC positivo e comune aumentano l'autoefficacia che a sua volta aumenta l'aderenza farmacologica e la patient activation; al contrario il DC negativo è dannoso durante il ricovero e anche dopo la dimissione. Il terzo studio indaga la relazione tra il distress psicologico e la qualità del supporto del partner (iperprotezione, ostilità e supporto al patient engagement) attraverso il ruolo moderatore del DC. I risultati mostrano che un alto distress psicologico è associato ad un peggior supporto del partner tra coloro che hanno basso DC positivo e alto DC negativo.This research has a dyadic approach involving both patients with cardiovascular disease and their partner during the hospitalization. The first study investigates the effect of dyadic coping (DC) on partners’ marital satisfaction considering the moderating effect of the partners’ psychological distress. The results show that the beneficial effect of positive and common DC on marital satisfaction occurs when the partners’ psychological distress is low, on the contrary negative DC decreases marital satisfaction among those who have high levels of psychological distress. The second study aims to investigate the relationship between DC, adherence to medications and patient activation. The relationship is mediated by the patient health self-efficacy: positive and common DC increase patient health self-efficacy which in turn increases adherence to medication and patient activation; on the contrary, the negative DC is detrimental during hospitalization and also over time after discharge. The third study investigates the relationship between psychological distress and the quality of partner support (overprotection, hostility and support for patient engagement) through the moderating role of DC. The results show that high psychological distress increases worse partner support among those with low levels of positive DC and high negative DC.
36
RAPELLI, GIADA. "BATTITI DEL CUORE: UNA RICERCA DIADICA SU PAZIENTI CON MALATTIE CARDIACHE E I LORO PARTNER." Doctoral thesis, Università Cattolica del Sacro Cuore, 2021. http://hdl.handle.net/10280/90822.
Abstract:
Questa ricerca ha un approccio diadico che coinvolge sia i pazienti con malattie cardiovascolari che il loro partner durante l'ospedalizzazione. Il primo studio indaga l'effetto del coping diadico (DC) sulla soddisfazione coniugale dei partner considerando l'effetto moderatore del distress psicologico dei partner. I risultati mostrano che l'effetto benefico del DC positivo e comune sulla soddisfazione coniugale si verifica quando il distress psicologico dei partner è basso, al contrario il DC negativo diminuisce la soddisfazione coniugale tra coloro che hanno alti livelli di distress psicologico. Il secondo studio si propone di indagare la relazione tra DC, aderenza farmacologica e patient activation. La relazione è mediata dall'autoefficacia per la salute del paziente: il DC positivo e comune aumentano l'autoefficacia che a sua volta aumenta l'aderenza farmacologica e la patient activation; al contrario il DC negativo è dannoso durante il ricovero e anche dopo la dimissione. Il terzo studio indaga la relazione tra il distress psicologico e la qualità del supporto del partner (iperprotezione, ostilità e supporto al patient engagement) attraverso il ruolo moderatore del DC. I risultati mostrano che un alto distress psicologico è associato ad un peggior supporto del partner tra coloro che hanno basso DC positivo e alto DC negativo.This research has a dyadic approach involving both patients with cardiovascular disease and their partner during the hospitalization. The first study investigates the effect of dyadic coping (DC) on partners’ marital satisfaction considering the moderating effect of the partners’ psychological distress. The results show that the beneficial effect of positive and common DC on marital satisfaction occurs when the partners’ psychological distress is low, on the contrary negative DC decreases marital satisfaction among those who have high levels of psychological distress. The second study aims to investigate the relationship between DC, adherence to medications and patient activation. The relationship is mediated by the patient health self-efficacy: positive and common DC increase patient health self-efficacy which in turn increases adherence to medication and patient activation; on the contrary, the negative DC is detrimental during hospitalization and also over time after discharge. The third study investigates the relationship between psychological distress and the quality of partner support (overprotection, hostility and support for patient engagement) through the moderating role of DC. The results show that high psychological distress increases worse partner support among those with low levels of positive DC and high negative DC.
37
Ferrer, Llabrés Catalina. "Cyclization of indoles and enol ethers with alkynes catalyzed by platinum and gold." Doctoral thesis, Universitat Rovira i Virgili, 2008. http://hdl.handle.net/10803/9022.
Abstract:
El indol es uno de los heterociclos aromáticos presente en mayor número de productos naturales con propiedades farmacológicas. Aunque se han desarrollado diferentes métodos para sintetizar derivados de indoles, la búsqueda de metodologías para obtener nuevos compuestos es todavía un tema de interés en química orgánica. Un método interesante para sintetizar derivados de indol es la reacción de hidroarilación de alquinos.Hemos encontrado que la hidroarilación intramolecular de de alquinos catalizada por nuevos complejos de Au(I) permite la síntesis de derivados de indol con anillos de siete miembros fusionados en una reacción de tipo 7-exo-dig. Cuando esta misma reacción se lleva a cabo con AuCl3, en lugar de anillos de siete se forman anillos de ocho miembros en un proceso poco frecuente de tipo 8-endo-dig. En algunas ocasiones, también hemos observado la formación de alenos o tetraciclos como resultado de una reacción de fragmentación. Basándonos en resultados experimentales, hemos propuesto un mecanismo para la formación de este tipo de sustratos que consiste en la formación de un enlace C-C en la posición tres del indol, seguido de una migración 1,2, en una reacción de tipo Friedel-Craft. Hemos desarrollado la versión intermolecular de la reacción entre indoles y alquinos obteniendo una amplia diversidad de productos en función de la sustitución en el indol y el alquino.
En el segundo capítulo de la Tesis esta metodología sintética ha sido aplicada al estudio de la síntesis total de los productos naturales lundurinas A-D, cuya estructura posee una indoloazocina. Mediante la ciclación catalizada por AuCl3 del sustrato adecuado hemos conseguido sintetizar la estructura tetracíclica característica de esta familia de compuestos.
Otro tema de mi trabajo de Tesis Doctoral ha sido el estudio de la reacción de éteres de enol con alquinos catalizada por platino y por oro. Cuando uno de los átomos del puente entre el alquino y el éter de enol es un oxígeno se obtienen 3-oxabiciclo[4.1.0]hept-4-enos mediante la ciclopropanación intramolecular de éteres de enol por alquinos catalizada por Pt(II) u Au(I) De acuerdo con el esquema general del mecanismo de la ciclación de 1,6-eninos catalizada por Pt(II), Pd(II) y Au(I), los ciclopropil carbenos metálicos formados en la ciclación de tipo 6-endo-dig pueden evolucionar para dar anillos de siete miembros. Este tipo de reactividad ha sido observada por primera vez en la reacción intramolecular que hemos desarrollado de éteres de enol con alquinos catalizada por complejos de oro y platino electrófilos. En algunos ejemplos de las reacciones catalizadas por Au(I) se han obtenido acetales fruto de un complejo reordenamiento de la molécula que también transcurre a través de un intermedio con un anillo de siete miembros.
Finalmente, hemos hecho una nueva propuesta para el mecanismo de la ciclación de alquinil iminas para dar pirroles catalizada por Cu(I), corrigiendo el mecanismo originalmente propuesto por Gevorgyan. De acuerdo con la nueva propuesta, hemos hecho un estudio de la síntesis de pirroles sustituidos en posición tres.
Indole is a structure present in a large number of alkaloids and natural products with important pharmaceutically properties. Although a variety of methods have been developed to sythesize derivatives of this heterocycle and to modify its substitution pattern, new methods that provide indole derivatives are still of high interest in organic chemistry. An interesting way to obtain indole derivatives could be the catalytic hydroarylation of alkynes, although this method has not been widespread developed, until now.
We have found that the intramolecular hydroarylation of alkynes using recently developed cationic gold(I) complexes allows the synthesis of seven membered ring indole derivatives by a 7-exo-dig cyclization process. Interestingly, AuCl3 promotes the formation of eight membered rings by an unusual 8-endo-dig cyclization. In some cases, we have also observed the formation of allenes or tetracyclic derivatives with gold(I), as a result of a fragmentation reaction. Based on experimental results, a mechanism has been proposed to explain the formation of these compounds. This mechanism involves a C-C bond formation at C-3 followed by a 1,2-migration in a Friedel-Craft type reaction.
We have also developed the intermolecular reaction between indoles and alkynes catalyzed by gold, giving rise to a wide range of different products.
In the second chapter of this Thesis the methodology developed for the cyclization of indoles with alkynes has been applied to the study of the total synthesis of the family of natural products lundurines A-D. This products contain an indoloazocine unit and by the cyclization of the appropiate substrate the tetracyclic core of the lundurines has been synthetized.
Another topic of my Doctoral Thesis is the study of the reaction of enol ethers with alkynes. A methodology for the synthesis of 3-oxa-biciclo[4.1.0]hept-4-enes catalyzed by Pt(II) and Au(I) has been developed The general mechanism of Pt(II)-, Pd(II)-, and Au(I)-catalyzed reactions between alkynes and alkenes has been demonstrated in the context of 1,6-enyne cyclization. Accordingly cyclopropyl metal carbenes formed in the 6-endo-dig cyclization may evolve to form seven-membered ring intermediates. This has been achieved for the first time by using highly electrophilic platinum(II) and gold(I) complexes. Gold(I) also triggers a remarkable rearrangement of certain enynes leading to complex cyclic systems. This reaction also proceeds via a seven-membered ring intermediate.
Finally, the mechanism for the cyclization of alkynyl imines catalyzed by Cu(I) to give pyrroles originally proposed by Gevorgyan has been corrected. Based on this new mechanistic proposal, we have carried out a study for the synthesis of 3-substitud pyrroles.
38
MORI, Hideo, Toshihiko ISHIDA, Shigeyuki HAYASHI, Yoshinori AOKI, and Tomohide NIIMI. "A Study on REMPI as a Measurement Technique for Highly Rarefied Gas Flows (Simulations and Its Fundamental Properties of REMPI Spectra)." The Japan Society of Mechanical Engineers, 2000. http://hdl.handle.net/2237/9022.
39
Rhodes, Bradley James. "Just-in-time information retrieval." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9022.
Abstract:
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Architecture, 2000.Includes bibliographical references (p. 145-150) and index.
This thesis defines Just-In-Time Information Retrieval agents (JITIRs): a class of software agents that proactively present potentially valuable information based on a person's local context in an easily accessible yet non-intrusive manner. The research described experimentally demonstrates that such systems encourage the viewing and use of information that would not otherwise be viewed, by reducing the cognitive effort required to find, evaluate and access information. Experiments and analysis of long-term use provide a deeper understanding of the different ways JITIRs can be valuable: by providing useful or supporting information that is relevant to the current task, by contextualizing the current task in a broader framework, by providing information that is not useful in the current task but leads to the discovery of other information that is useful, and by providing information that is not useful for the current task but is valuable for other reasons. Finally, this research documents heuristics and techniques for the design of JITIRs. These techniques are based on theory and are demonstrated by the field-testing of three complete systems: the Remembrance Agent, Margin Notes, and Jimminy. Specifically, these heuristics are designed to make information accessible with low effort, and yet ignorable should the user wish to concentrate entirely on his primary task.
by Bradley James Rhodes.
Ph.D.
40
Sanad, Ahmed Abdullah. "Developing an integrated model to support effective customer relationships management implementation within the private sector of the Kingdom of Saudi Arabia." Thesis, De Montfort University, 2012. http://hdl.handle.net/2086/9022.
Abstract:
A successful Customer Relationships Management (CRM) implementation helps organisations to obtain competitive advantages over others by improving customer satisfaction and loyalty, increasing revenue and reducing operating costs. Effective CRM implementation has become more and more important owing to the huge percentage of failures that occur. This year, organisations are expected to spend about $13billion on implementing CRM. While a significant amount of research has been conducted into CRM implementations, particularly with respect to Critical Success Factors (CSFs), only a minority of the implementations have been successful. Culture plays a major role in CRM implementation. It is ranked one of the top three factors involved in CRM's CSFs. Culture, therefore, become significant issues when planning to implement CRM within the developing countries, such as the Kingdom of Saudi Arabia (KSA) due to its existing cultural differences. Very limited research into CSFs for CRM implementation in the KSA exists. This research, therefore, focuses on identifying the CSFs and their interrelationships for CRM implementation in the KSA with the ultimate aim of developing an integrated model that includes these factors and their interrelationships to support effective implementation of CRM solutions within the private sector of the KSA from both organisations' and customers' perspectives. It adopts an integrated mix of case study and Grounded Theory as a research strategy. Data was collected through semi-structured interviews and documentation, which was then analysed using Grounded Theory data analysis. The findings showed that adoption of CRM in the KSA revealed some additional CSFs to those found within other studies, such as customer culture and the country's policies and procedures. The interrelationships between the CSFs of CRM were identified and shown to be vital for successful CRM implementation. The results identified the relationships between CRM's CSFs and their key development stages. The findings were interpreted by using Institutional Theory. It was found that implementing a CRM solution as a response to institutional isomorphism pressures could lead to a conflict and mismatch of institutional logics among customers and CRM solutions. Organisations subjected to these pressures implemented CRM without the advantage of a cost-benefit analysis. This increased the failure of CRM adoption. This research makes six major contributions. Firstly, a theoretical contribution was made by applying Institutional Theory to enrich the understanding and interpretation of the research's findings. This provided useful insight into the main factors that affect the adoption of CRM and extended the line of research on the use of this theory to study Information Systems (IS) in organisations. Secondly, the development of the research model presented the CSFs that affected the adoption of CRM solutions and their interrelationships from both the organisations and customers' perspectives within KSA. Thirdly, the research identified thirty-one cause-and-effect relationships between CSFs that need to occur in a dependency mode for the success of CRM implementation. Fourthly, it identified that each CSF needs to be executed in certain stages during the CRM's development life cycle. Fifthly, this research provides organisations within the private sector in the KSA (those that intend to implement CRM solutions) with an extensive way of thinking about its CRM implementation. Finally, this research is one part of the very limited research focusing on the implementation of CRM solutions within the private sector in the KSA.
41
Zraida, Saloua. "L'influence du pays d'origine sur l'évaluation des produits par les vendeurs el les consommateurs : une étude comparative." Mémoire, Université de Sherbrooke, 1995. http://hdl.handle.net/11143/9022.
Abstract:
Dans un contexte économique où globalisation des marchés et mondialisation des échanges commerciaux sont les mots d'ordre, nous assistons à une prolifération de produits hybrides ayant plus d'une origine nationale. Le made-in d'un produit n'a désormais plus de sens si on ne le scinde en deux concepts : le pays de conception où est "pensé" et conçu le produit et le pays d'assemblage où a lieu la fabrication physique du produit. Plusieurs recherches sur le made-in ont démontré que le pays de conception et le pays d'assemblage avaient effectivement une influence sur les évaluations de la qualité et de la valeur d'achat des produits par les consommateurs. L'objet de cette étude est de savoir si l'origine nationale a une influence sur un autre intervenant dans le processus d'achat : le vendeur et si cette influence est comparable à celle déjà observée chez le consommateur. 194 vendeurs d’appareils électroniques des villes de Montréal, Québec et Sherbrooke ont évalué des pays d'origine de niveaux de développement différents ainsi que la qualité et la valeur d'achat de trois catégories de produits : magnétoscopes, chaussures et automobiles. Chaque produit était caractérisé par cinq attributs : le pays de conception, le pays d'assemblage, la marque, la garantie et le prix. Les résultats obtenus ont été comparés à ceux issus d'une recherche antérieure sur l'influence du pays d'origine sur un échantillon de consommateurs (de Bussac, 1992). Cette étude comparative démontre notamment que les vendeurs, comme les consommateurs, associent des stéréotypes aux pays d'origine, stéréotypes qui influencent leur évaluation de la qualité et de la valeur d'achat des produits. Par ailleurs, la majorité des vendeurs interrogés pense que les consommateurs qu'ils rencontrent ne font pas de distinction entre pays de conception et pays d'assemblage. Il semble aussi que le pays d'origine est l'attribut du produit que les vendeurs utilisent le moins dans leur argumentation de vente.
42
Cuellar, Quispe Juan Carlos. "Evolución magmática – hidrotermal del sistema pórfido – skarn Paraíso y su relación con la mineralización de Cu-Mo, batolito de Andahuaylas Yauri, Apurímac, Perú." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2014. https://hdl.handle.net/20.500.12672/9022.
Abstract:
Publicación a texto completo no autorizada por el autorRelaciona las características mineralógicas, petrográficas y geoquímicas de los diferentes intrusivos con las diferentes venillas reconocidas. En base al logueo paragenético se identificó 15 tipos de venillas clasificadas desde el Tipo 1 al Tipo 15 según sus ensambles mineralógicos, los cuales se agruparon en tres eventos (pre mineralización, mineralización principal y post mineralización). Los intrusivos y stocks porfiríticos muestran un enriquecimiento progresivo de tierras raras livianas (LREE) y un empobrecimiento en tierras raras pesadas (HREE), lo que nos sugiere el paso de una corteza dominada por clinopiroxenos a una corteza dominada por anfíbol. El plutón precursor está conformado por cuarzodiorita y tonalita. La cuarzodiorita no generó venillas comportándose como roca hospedante mientras que la tonalita sólo presenta venillas de cuarzo con halo de feldespato potásico (cz//FPKs). El plutón parental de textura y composición pórfido tonalítico presenta todos los tipos de venillas reconocidos, siendo aparentemente el generador de venillas de FPKs, cz±mb,ab-epi, cz//FPKs, cz, cz-mb, anh (Tipo 1 hasta Tipo 7), estas venillas representan la alteración potásica las cuales están relacionadas a mineralización esporádica de molibdeno. El emplazamiento del plutón parental en una secuencia calcárea generó un ensamble típico de skarn el cual, a raíz del posterior enfriamiento del sistema desarrolló un típico ensamble retrogrado: epi-CLOs-mt-py-cpy (Tipo 9 hasta Tipo 12). Cortando al pórfido tonalítico (plutón parental) se observa una brecha magmática hidrotermal mineralizada. El pórfido dacítico 2 (stock porfirítico tardimineral) hospeda venillas de cz-cac-esf (Tipo 15, la más tardía del sistema) y presenta un patrón de tierras raras irregular por diferenciación magmática, (ratio de Sm/Yb 2.5 y 3). El último evento magmático está representado por diques dacíticos de textura porfirítica y matriz mico cristalina con alteración propilítica. Los resultados de datación por el método U/Pb en zircón, reporta para el pórfido tonalitico (plutón parental) una edad de 34.23±0.20 Ma.; Pórfido dacítico 1, 33.68±0.21 Ma, y para la dique dacítico post mineral 33.71±0.36 Ma. Estas edades correlacionan con la edad de mineralización en el batolito Andahuaylas-Yauri (Eoceno superior-Oligoceno temprano). Finalmente, en base a los resultados obtenidos en el presente estudio, se recomienda explorar en las quebradas con mayor incisión para identificar el intrusivo responsable de las venillas de cz-cpy (Tipo 13). Así mismo para explorar por yacimientos tipo pórfido se debe trabajar al norte de la Falla regional Paraíso buscando la intersección de los sistemas de fallas con dirección NO-SE y NNE-SSO.
Tesis
43
Smith, Michael Douglas. "Modelling regime shifts in the southern Benguela : a frame-based approach." Master's thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/9022.
Abstract:
Includes bibliographical references (leaves 83-88).Small pelagic fish populations in productive upwelling systems are characterised by long-term patterns of alternating dominance. Sardine and anchovy are the most important small pelagic species in the southern Benguela ecosystem, which has been shown to have undergone regime shifts during the past 50 years. Modelling regime shifts at an ecosystem scale can be of great importance in fisheries management, to aid in long-term planning and fishing strategy evaluation. Frame-based modelling has been successfully applied to regime shift dynamics in terrestrial ecosystems. The pattern of abrupt shifts between quasi-stable regimes suggests the usefulness of a frame-based approach in the southern Benguela ecosystem, with separate frames describing each small pelagic fish dominance pattern. Frame-based modelling is applied to sardine/anchovy dynamics under the influence of climate variability involving interaction with the small pelagic fishery. Four frames are used in the model: Both Species High; Sardine High / Anchovy Low; Anchovy High / Sardine Low; and Both Species Low. Switching rules for transition between the frames are described. Rapid prototyping is used to construct and test first- and second-generation prototypes of a frame-based model. A sensitivity analysis of the model is performed, and the model is found to be sensitive to the frame switching rules. The model is also reasonably sensitive to the sardine population model parameters, and the influence of juvenile sardine bycatch is noticeable in the "Sardine Low" frames. The model behaviour is relatively insensitive to climate variability, but the inherent degree of stochasticity in the sardine recruitment calls for continuous population monitoring and adjustment of fishing levels to avoid crashing the modelled sardine stock. Frame behaviour in the model is sensitive to sardine fishing activity. The model is exercised in a variety of scenario analyses, and confidence in the model is strengthened by the observed parallels to the real world. The use of the model as a "test platform" is explored to improve understanding of fishing impact on the dynamics of small pelagic populations. Previously identified advantages of the frame-based modelling technique include their particular usefulness in inter-disciplinary teams and the ease with which a frame-based model can be expanded and modified, and the experiences of this project support these findings. The use of frames as indicators adds information about the condition of the modelled stock at a given point beyond what can be inferred by population levels alone. Frame-based modelling is also found to be an approach well-suited to the development and maintenance of the computer software which encapsulates the model, and as a common interface between biologists, programmers and non-specialist model users. Suggested applications of the model include deriving "probabilities of change" for use in an expert system to predict long-term ecosystem changes. Applications of the model in understanding the impact of survey data error and compliance issues are discussed.
44
Hanna-Walker, Veronica R. "Missing Piece of the Puzzle: Creating a General Meaning of Sex Measure." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/9022.
Abstract:
The presence of and/or search for meaning has divergent and salient outcomes for individuals’ physical, mental, and emotional well-being. Although numerous domains of meaning have been examined, the literature on the meaning of sex is sparse and lacks a quantitative measure. In this study, I aimed to validate a general Meaning of Sex (MOS) Measure that captured the presence of (MOS-P) and search for (MOS-S) the meaning of sex that predicted salient relational and sexual outcomes (i.e., relationship stability and satisfaction and sexual satisfaction). The MOS measure was based off of the Meaning in Life Questionnaire (MLQ) created by Steger and colleagues (2006), which also used the subscales of presence and searching. All participants (N = 856) reported engaging in what they considered to be sexual intercourse and were either single or in a relationship. The two subscales were distinct from one another and had good reliability. The MOS-S had a stronger (and negative) association with relationship stability and sexual satisfaction than the MOS-P. Further analyses revealed that there were significant interactions between the MOS-P and MOS-S. When individuals scored high on the MOS-P, searching for a meaning of sex no longer had a significant association with relationship stability or sexual satisfaction. Creating this measure is meaningful because it provides a more holistic picture of sexuality that has not been addressed in the literature.
45
Kalla, Markus. "Epigenetik von Epstein-Barr Virus : Regulation viraler Gene in der frühen Phase der Infektion." kostenfrei, 2007. http://edoc.ub.uni-muenchen.de/9022/.
46
Dinh, Khanh T. "Predictors of psychosocial well-being in an Asian American sample : acculturation, intergenerational conflict, and parent-child relationships /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/9022.
47
Wu, Kuei-I. "Compositions featuring the piano in fantasy form, 1820-1920." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/9022.
Abstract:
Thesis (D.M.A.) -- University of Maryland, College Park, 2006.Thesis research directed by: Music. Title from t.p. of PDF. Marylandia and Rare Books Dept., University of Maryland, College Park, Md. Audio available on compact disc;
48
Oliveira, Diogo Miguel Quaresma Jorge de. "Efeito da construção da barragem do Pisão (Beja, Portugal) nas comunidades de aves." Master's thesis, Universidade de Évora, 2013. http://hdl.handle.net/10174/9022.
Abstract:
“Efeito da construção da barragem do Pisão (Beja, Portugal) nas comunidades de aves.”
RESUMO
Neste estudo pretendemos avaliar os impactos da barragem do Pisão na comunidade de aves, comparando as categorias de aves terrestres, aquáticas e de rapina na situação de referência anterior à construção da barragem com 2 anos consecutivos posteriores ao encerramento das comportas. Os dados foram fornecidos pela EDIA S.A. e correspondem a monitorizações sistemáticas direcionadas para as três categorias de aves nos anos 2007, 2009 e 2010. Foi calculada uma matriz de semelhança de forma a comparar a composição das três categorias de aves ao longo dos anos. Para avaliar o efeito da barragem do Pisão foi calculada uma “one-way ANOVA” para as aves terrestres e de rapina, tendo também sido realizada uma análise canónica de correspondência (CCA) para as aves terrestres onde foi avaliada a associação entre 2 anos e variáveis de habitat. Para as aves aquáticas foi realizada uma “two-way ANOVA”. Os resultados mostram a importante diferença entre a situação de referência anterior à construção e os anos posteriores para as aves aquáticas e grandes semelhanças entre anos para as aves terrestres e de rapina. As aves de rapina apresentam elevados valores de semelhança que podem ser explicados pelos poucos avistamentos nos três anos. A barragem do Pisão evidenciou ser importante para as aves aquáticas em geral, em especial para Fulica atra e para Podiceps cristatus.
11
The impact of dam construction in bird communities – a case study in South Portugal
ABSTRACT
In this study we evaluate the impact on bird communities of the construction of the Pisão dam, comparing birds of prey, terrestrial birds and waterbirds before and after dam building. Survey data was granted by EDIA S.A. and corresponds to systematic surveys of the three bird categories carried out in 2007, 2009 and 2010. To compare the bird community (in each category surveyed) between the years, we calculated a similarity matrix. We used one-way ANOVA to detect significant responses of birds of prey and terrestrial birds species to the introduction of the dam along the three-year study. We used canonical correspondence analysis (CCA) to evaluate the associations between two years (2007 and 2010), habitat variables and terrestrial birds assemblages. For waterbirds we used two-way ANOVA using the relationship between the year and the waterbodies areas. The birds of prey and the terrestrial birds were the groups that presented the highest community similarity between years. The high values of similarity detected in the birds of prey can be explained by wide range of the territories and the lower number of species. For waterbirds, there is an important difference between 2007 and the following years perceived as a direct result of the dam. The dam showed to be important for waterbird species, especially for Fulica atra and Podiceps cristatus.
49
Strube, Jan 1978. "Analysis of radiative decays of charged B mesons to baryonic final states." Thesis, University of Oregon, 2008. http://hdl.handle.net/1794/9022.
Abstract:
xxvi, 199 p. : ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.The abundance of B mesons at B factories opens the door to the search in rare decays for physics outside of the Standard Model. Flavor-changing neutral current transitions proceed only via higher order in the Standard Model, resulting in a b [arrow right] s³y branching fraction of about 3 x 10 -4 , but hypothesized particles could alter the rate significantly. Decays of B mesons that proceed via this electroweak penguin diagram are an interesting example of flavor-changing neutral currents, due to the large number of accessible final states with observables that are sensitive to new processes. This dissertation describes the analyses of such decays B - [arrow right] p ³, B - [arrow right] £ 0 p ³, B - [arrow right] p and B - [arrow right] p using about 350 million B meson pairs recorded by the BABAR detector in the years 2001 through 2006. In addition to the decay rate, the distribution of the invariant mass of the baryon pair is presented, using a method for statistical unfolding. The analysis is the first of these decays at the BABAR experiment and lays the groundwork for future analyses of the branching fractions and angular correlations of b [arrow right] s decays containing A hyperons and other baryons at BABAR or higher luminosity B factories.
Adviser: James E. Brau
50
Meirelles, Durval Correa. "A distribuição das receitas e dos gastos entre os niveis de governo e o desiquilibrio das contas publicas federais." reponame:Repositório Institucional do FGV, 1995. http://hdl.handle.net/10438/9022.
Abstract:
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This research tries to identify the link between distributing expenses and the public budget between leveIs of governrnent, and the financiaI unbalance that has taken over the federal governrnent. This research tries to show the historical evolution of the tax and tariff distribution in Brazil, always relating it to the increase of the national debt. In an embrionary way this research analyses the debate over the governrnents job in controlling the econorny, and the I I participation of the actors involved and their proposals to reduce the public deficit, and, consequently, the national debt.
A pesquisa procura identificar o elo existente entre a distribuição dos gastos e receitas públicas, entre as esferas de governo, e o desequilíbrio financeiro que se instalou no setor público federal. Desta forma, o estudo procura mostrar a evolução histórica da distribuição de tributos e encargos no Brasil, sempre procurando correlacioná-la ao crescimento da dívida pública. De forma embrionária o trabalho analisa o debate sobre a redefinição sobre o papel do Estado na economia e a participação dos atores envolvidos e suas propostas, para a diminuição do déficit público e, conseqüentemente, da dívida pública.