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Dudová, Zuzana. "Reštrukturalizácia logistického reťazca spoločností DSI Slovakia, s.r.o. a DSI Czech, s.r.o." Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-10844.
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The diploma thesis is focused on the logistic system of the particular companies. In the theory part you can find explanation for the following expressions: insourcing, backsourcing and outsourcing, focusing on the reasons that lead companies to outsource operations, advantages and disadvantages which outsourcing entail and the whole process description. Practical part focuses on a particular description of general logistical system of companies DSI Czech, s.r.o. and DSI Slovakia, s.r.o.; identifying a weak part of the system and the analysis of possible solutions with the attention to the high level of services provided with the optimal costs. The proposal considers the possibility of using outsourcing or continuing to use inhouse logistic management.
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Cardinal, Robert W., and George F. Tremain. "Space Shuttle Data Formatter DSI Model 7303 System." International Foundation for Telemetering, 1987. http://hdl.handle.net/10150/615288.
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International Telemetering Conference Proceedings / October 26-29, 1987 / Town and Country Hotel, San Diego, CaliforniaThis abstract describes the hardware and software necessary for reserialization of asynchronous imbedded image data. The purpose of the DSI Model 7303 System is to reformat space shuttle imbedded (Payload Data Interleaver) PDI data. the system consists of two decoms, a DSI model 7303A and a DSI Model 7303B. The input to the 7303A box is 0I or NSP data (NRZ-L & CLOCK). The 7303A Frame syncs to the 0I or NSP data. The 7303A is front panel programmed to strip out only the imbedded PDI data and pass this data to the 7303B Decom. The 7303B Frame syncs to the PDI frame sync pattern. A second strip zone defines which words in the PDI frame get passed to the FIFO. A 24K byte ring FIFO Buffer is used to buffer data before reserialization for output. The serial output rate is a function of how many programmed PDI words per second are stripped out and the FIFO management status. The output bit rate is from a microprocessor controlled NCO. This system Makes possible real time video of Shuttle PDI data.
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OLIVEIRA, Thiago Borges de. "DSI-RTree - Um Índice R-Tree Distribuído Escalável." Universidade Federal de Goiás, 2010. http://repositorio.bc.ufg.br/tede/handle/tde/506.
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dissertacao thiago b de oliveira 2010.pdf: 575961 bytes, checksum: 7a5a7e195780fa853d33c7629520df2a (MD5)
Previous issue date: 2010-12-15The demand for spatial data processing systems that support the creation of massive applications has steadily grown in the increasingly ubiquitous computing world. These demands aims to explore the large amount of existing data to assist people s daily lives and provide new tools for business and government. Most of the current solutions to process spatial data do not meet the scalability needed, and thus new solutions that efficiently use distributed computing resources are needed. This work presents a distributed and scalable system called DSI-RTree, which implements a distributed index to process spatial data in a cluster of computers. We also have done a review of details related to the construction of the distributed spatial index, by addressing issues such as the size of data partitions, how that partitions are distributed and the impact of these definitions in the message flow on the cluster. An equation to calculate the size of the partitions based on the size of data sets is proposed, to ensure efficiently query processing on the proposed architecture. We have done some experiments running window queries in spatial data sets of 33,000 and 158,000 polygons and the results showed a scalability greater than linear.
Em face de um mundo computacional ubíquo cada vez mais possível, tem crescido constantemente a necessidade de sistemas de processamento de dados espaciais que suportem a criação de aplicações massivas para explorar a grande quantidade de dados existente, a fim de auxiliar a vida cotidiana das pessoas e prover novas ferramentas para empresas e governo. Soluções atuais de processamento, em sua maioria, não possuem a escalabilidade necessária para atender esta demanda e novas soluções distribuídas que usam eficientemente os recursos computacionais são necessárias. Este trabalho apresenta o DSIRTree, um sistema distribuído e escalável, que implementa a indexação e processamento distribuído de dados espaciais em um cluster de computadores. Uma avaliação de parâmetros da construção do índice espacial distribuído é realizada, abordando aspectos como o tamanho das partições criadas, a forma de distribuição destas partições e o impacto destas definições na troca de mensagens entre as máquinas do cluster. Uma fórmula para cálculo do tamanho das partições conforme o tamanho dos datasets é proposta, a fim de garantir eficiência no processamento de consultas na arquitetura projetada. Testes práticos do sistema mostraram uma escalabilidade maior que linear no processamento de consultas de janela em datasets espaciais de 32 e 158 mil polígonos.
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Biswas, Subal C. "Efficiency and effectiveness of deep structure based subject indexing languages : PRECIS vs. DSIS." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/7280.
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A 'Subject Indexing Language' (SIL) is an artificial language used for formulating names of subjects. Although classificationists have sought for universals in many fields of study such as, philosophy, biology, general systems theory, etc., the search for a deep structure of SILs formally began with Ranganathan's idea of 'absolute syntax' and was brought to the present by G. Bhattacharyya and D. Austin. Whereas Bhattacharyya's deep structure of SIL is primarily based on classificatory principles (parallel to 'absolute syntax'), the deep structure proposed by Austin has a linguistic connotation. The present study describes and compares two such deep structurebased SILs, viz., PRECIS (PREserved Context Index System) and DSIS (Deep Structure Indexing System), a recent computerized version of POPSI (POstulate-based Permuted Subject Indexing), developed by F. J. Devadason at Documentation Research and Training Centre, Bangalore, India. Both also belong to the category of SILs typified as 'string indexing' languages. The study involves: i) writing of a suitable DSIS index entry generation program, ii) using both PRECIS (in-house) and DSIS programs to index a collection of representative sample documents from the soft sciences, iii) analyzing and comparing their respective syntactic and semantic aspects in terms of both linguistic and classificatory principles, and iv) applying some measures of efficiency and effectiveness. It was realized that certain modifications in the existing DSIS string manipulation algorithms are necessary to make the program fully operational. Although, no attempts have been made to quantify the measures of effectiveness and efficiency as such, suggestions have been provided as to what these probably would be. Some indications of their searching difficulties for a prospective searcher have been put forward as well.
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Wang, Xiaoxin. "3G HSDPA Performance In Mobile Internet Connections." Thesis, KTH, Mikroelektronik och Informationsteknik, IMIT, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93068.
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A key objective for 3G wireless networks, such as the Universal Mobile Telecommunication System (UMTS), is the explicit support for data communications for mobile users. Today, the dominant transport protocol in the Internet is the Transport Control Protocol (TCP). Since TCP was not tailored for wireless networks, there are some performance issues occurring when TCP traffic is transferred over a UMTS radio link. In this paper, the characteristics of TCP and UMTS are specified and the problems of TCP over UMTS dedicated channels (DCHs) are analyzed. The problem is high delays implying low utilization of allocated resources for small file transfers or due to packet losses. High Speed Downlink Packet Access (HSDPA)’s potential to solve the problem is studied. Since in HSDPA, High-Speed Downlink shared channel (HS-DSCH) is introduced as an alternative of DCH on downlink packet access, a model of HS-DSCH is built and simulations are performed in order to compare its TCP performance with DCH. The focus is on studying retransmission delay and Block Error Rate (BLER) targets. Some scheduling methods are also compared. The results indicate that HS-DSCH gives better TCP performance than a DCH, and that advanced scheduling methods gives similar result as round robin if there are packet losses. Moreover, a somewhat surprising result is found regarding fast retransmission and channel utilization for increasing BLER targets.I denna rapport specificeras karaktäristiken för TCP and UMTS, och problemet med TCP över dedikerade UMTS kanaler analyseras. Problemet är höga fördröjningar som medför låg utnyttjande grad av allokerade resurser vid överföring av små filer eller vid paket förluster. High Speed Downlink Packet Access (HSDPA)’s potential att lösa problemet studeras. En modell av HS-DSCH konstrueras och simuleringar utförs för att jämföra dess TCP prestanda med DCH. Fokus är på att studera återsändningsfördröjning och BLER riktvärden. Några scheduleringsmetoder jämförs också. Resultatet indikerar att HS-DSCH ger bättre TCP prestanda än DCH, och att avancerad scheduleringsmetoder ger liknande resultat som round robin vid paket förluster. Dessutom har ett ganska överraskande resultat funnits kring snabb återsändning och kanal utnyttjande grad då BLER riktvärdet ökar.
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Le, Melinaire Pascal. "Modélisation de relations géométriques par la méthode DSI : application à la géologie." Vandoeuvre-les-Nancy, INPL, 1992. http://docnum.univ-lorraine.fr/public/INPL_T_1992_LE_MELINAIRE_P.pdf.
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L'ensemble des systèmes de CAO classiques supposent que les surfaces admettent une représentation paramétrique B(u,v) et sont interpolées par des fonctions du type Bezier, B-spline ou NURBS. Ces méthodes généralement appliquées dans l'industrie automobile et mécanique, ne permettent pas de traiter correctement des surfaces géologiques complexes ou de tenir compte interactivement de changements topologiques. Dans le cadre du projet GOCAD, J. L. Mallet propose une approche totalement différente, basée sur un nouveau principe d'interpolation en trois dimensions, appelé DSI (Discrete Smooth Interpolation). Les surfaces considérées sont constituées d'un maillage triangulaire et différents opérateurs linéaires, appelés contraintes, gouvernent l'allure de ces surfaces. Trois nouvelles contraintes vous sont proposées: les Fuzzy Control Point et Fuzzy Control Line ont respectivement pour but d'ajuster une surface à un ensemble de points distribués dans l'espace et à un ensemble de courbes, sans perturber la régularité et l'équilatérité des triangles du maillage. La contrainte On-Tsurf représente la notion géologique de contact entre deux surfaces ainsi que le glissement de l'une sur l'autre. Ces contraintes ont la particularité de mettre en jeu plusieurs objets, c'est pourquoi une importante partie de ce rapport est consacrée à un mécanisme de gestion de dépendances entre objets. Enfin, lorsque les objets sont appelés à partager un ensemble de points communs, un mécanisme d'échange, basé sur des importations et exportations, vous est présenté
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Andrade, Adriana Neves de [UNIFESP]. "Teste de identificação de sentenças dicóticas-DSI: desempenho em indivíduos audiologicamente normais." Universidade Federal de São Paulo (UNIFESP), 2009. http://repositorio.unifesp.br/handle/11600/10111.
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Previous issue date: 2009-01-28Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Objetivos: Padronizar a teste de identificação de sentenças dicóticas (DSI) em indivíduos normouvintes e comparar o desempenho entre: orelhas direita e esquerda, gênero, idade e escolaridade. Métodos: Participaram do estudo 200 indivíduos normouvintes com preferência manual direita, de ambos as gêneros, divididos em quatro grupos de acordo com a faixa etária: 13 a 19 anos, 20 a 29 anos, 30 a 39 anos e 40 a 49 anos. Todos as sujeitos foram submetidos a avalia<;ao audiol6gica básica e comportamental do processamento auditivo (teste de localização sonora, teste de memória para sons verbais e não verbais em seqüência, teste dicótico de dígitos) para excluir alterações auditivas periféricas e/ou distúrbio do processamento auditivo. A versão em português brasileiro do teste DSI foi elaborada e constou de seis faixas: calibrag8o, treino, integração binaural, escuta direcionada a direita, escuta direcionada a esquerda e treinamento auditivo. Para a analise dos resultados foram utilizadas medidas descritivas e analise inferencial (análise de covariância e variância com medidas repetidas, coeficiente de correlação de Spearman, teste de Kruskal-Wallis e método de Bonferroni). Resultados: Para o teste DSI, foi observado desempenho médio de 93,70% de acertos para a orelha direita e 88,60% de acertos à esquerda. Houve correlação negativa estatisticamente significante entre a porcentagem de acertos e a idade, em ambas as orelhas, para a treino (p=0,001 *) e para integraçao binaural (p=0,000*). Em relação ao grau de escolaridade, observou-se correlação positiva estatisticamente significante para todas as etapas do teste nas orelhas direita e esquerda. Não houve diferença estatisticamente significante entre os gêneros em nenhuma das etapas do teste OSI. Nas compara<;6es múltiplas, para as variáveis porcentagens medias de acertos e orelha, houve rela<;ao de dependência com a idade e escolaridade, mas não existiu dependência do gênero. Conclusoes: Os valores mínimos de referencia, considerando a etapa do teste e orelha são: 60% de acertos à direita e 40% de acertos à esquerda para a treino, 70% de acertos à direita e 60% de acertos à esquerda para a etapa de integração binaural e 72% de acertos bilateral mente na etapa de escuta direcionada. Na comparação do desempenho considerando as variáveis estudadas no teste DSI pode-se concluir que: há vantagem da orelha direita, não há diferenças entre os gêneros, com o aumento da idade há diminuição na porcentagem de acertos e quanto maior a nível educacional, melhor a desempenho dos indivíduos.
Purpose: To standardize the brazilian portuguese version of the dichotic sentence identification test (DSI) in normal listeners, comparing the performance of: right and left ears, gender, age and education. Methods: This study included 200 subjects normal listeners, right-handed, both genders, divided on four groups according to age: 13 to 19 years, 20 to 29 years, 30 to 39 years and 40 to 49 years. All subjects were submitted to basic audiological evaluation and behavioral auditory processing test (auditory localization test, verbal and non-verbal sounds in sequence, dichotic digits test) to exclude peripheral hearing impairment and/or auditory processind disorder. The DSI was prepared for the brazilian portuguese and applied in four stages: training, free report and directed report (right and left). For the analysis of the outcome measures were used descriptive and inferential analysis (analysis of variance and covariance with repeated measures, Spearman correlation coefficient, Kruskal-Wallis test and Bonferroni method). Results: For to DSI test, was observed average performance of 93,70% of hits for the right ear and 88,60% of hits left. There was a statistically significant negative correlation between the percentage of correct and age, in both ears, for training (p=0001*) and for free report (p=0000*). On the level of schooling, there was statistically significant positive correlation for all stages of the test in right and left ears. No statistically significant differences between genders in any of the stages of the DSI test. In multiple comparisons, for variables average percentages of correct and ear, there was a relationship of dependency with age and schooling, but there was no dependence on gender. Conclusions: The minimum values of reference, considering the stage of test and ear are: 60% of hits on the right and 40% of hits left for training, 70% of hits on the right and 60% of hits on the left to the stage of free report and 72% of hits in the stage of directed report bilaterally. In comparing the performance considering the variables in the DSI test could be held for all stages of the test, that there is advantage of the right ear, there are no differences between genders, with increasing age there is decrease in the percentage of correct and the higher the educational level, the better the performance of individuals.
FAPESP: 07/51231-1
TEDE
BV UNIFESP: Teses e dissertações
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McIntee, Gill Mary Sophie. "Dissociative symptoms in a deliberate self-harm and comparison female adolescent sample." Thesis, Bangor University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367311.
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Ahmed, Rafiq. "Seasonal Variation of Inorganic Nutrients (DSi, DIN and DIP) Concentration in Swedish River." Thesis, Linköping University, Department of Water and Environmental Studies, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10387.
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Rivers have been playing most important role as fresh water source and medium of nutrient transportation from terrestrial to aquatic ecosystem. Inorganic form of nutrients (DSi, DIN and DIP) are plant available mostly control the productivity of aquatic ecosystem. Transfer of these nutrients in higher concentrations cause harmful eutrophication in receiving water body.
Study of dissolved inorganic nutrients concentrations in 12 Swedish rivers of different basin characteristics demonstrated both similar and varying behaviour from river to river and from season to season depending on catchment hydrology; land use and geology. Highest concentration did not coincide with the highest runoff. High DSi concentration observed in the unperturbed rivers however, high DIN and DIP concentration observed in agriculture dominated river followed by river basin dominated by industrial and urban activities. DSi and DIN concentration observed high in winter and decreased through spring to reach lowest in summer. DIP concentration although found low in summer but high concentration observed in early spring and early autumn. Rivers with low average runoff positively correlated with DSi and DIN concentration however, DIP demonstrated weak correlation.
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Thibault, Isabelle. "Exercice de l'influence : perception de trois directrices de soins infirmiers (DSI) au Québec." Mémoire, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/6663.
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Les directrices de soins infirmiers (DSI) doivent être en mesure d'exercer de l'influence dans les établissements de santé afin d'accomplir efficacement leur mandat et atteindre leurs objectifs. En 2005, à la suite de la réorganisation du réseau de la santé, les DSI ont vu leur rôle évoluer et se profiler différemment en passant d'un rôle d'autorité hiérarchique à un rôle conseil dans la majorité des établissements de santé au Québec. La présente étude a pour but de décrire la perception de DSI concernant l'exercice de leur influence dans diverses structures de gouverne des soins infirmiers. De façon plus spécifique, l'étude vise à décrire leur contexte et leurs perceptions en regard des manifestations de l'influence, identifier certains facteurs et enfin, présenter le processus de l'exercice de l'influence tel que décrit par les participantes. Une étude de cas multiples a permis d'analyser les particularités et la complexité du phénomène de l'exercice de l'influence des DSI dans son contexte. L'échantillon intentionnel était formé de trois DSI, soit d'une DSI pour chacun des trois principaux modèles actuels de gouverne des soins infirmiers : hiérarchique, rôle conseil et hybride. Par conséquent, chacun des modèles de gouverne représentait un cas dont l'unité d'analyse était la DSI. Une recherche documentaire ainsi que deux entretiens semi-dirigés réalisés auprès de ces trois DSI ont constitué la stratégie de collecte des données. L'analyse qualitative inductive selon Miles et Huberman a été réalisée à l'aide d'une grille initiale d'analyse et les données ont été analysées au fur et à mesure par les membres de l'équipe. Bien que les DSI oeuvraient dans trois modèles de gouverne qui leur conféraient un statut et un rôle différent, les résultats révèlent que les stratégies déployées pour exercer de l'influence sont les mêmes à bien des égards. Plusieurs nuances ont tout de même été soulevées selon le modèle de gouverne en place. En effet, les DSI dans un modèle de gouverne hiérarchique et hybride utilisaient davantage des stratégies relevant du pouvoir fonctionnel, comme la prise de décision concernant la gestion des ressources et la circulation de l'information. Pour sa part, la DSI dans un modèle de rôle conseil employait surtout des stratégies qui relevaient du pouvoir personnel, telles la création de partenariat et l'utilisation de ses connaissances. Aussi, divers facteurs facilitaient l'exercice de l'influence d'une DSI, comme sa crédibilité dans l'organisation alors que d'autres, tels que la multiplicité des paliers organisationnels, étaient plus contraignants. Enfin, les DSI nous ont permis d'illustrer le processus de leur influence. Il est intéressant de constater que ce processus semble être similaire, peu importe le modèle de gouverne des soins infirmiers en place dans l'organisation. Les résultats de la présente étude renseignent donc les milieux cliniques sur diverses réalités associées à la gouverne des soins infirmiers et sur les conditions favorisant l'exercice de l'influence des DSI dans une organisation. L'ébauche du processus de l'influence, tel que perçu par ces DSI, tracera la voie pour des recherches ultérieures qui permettraient le développement d'un modèle illustrant l'exercice de l'influence des DSI au Québec.
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Cabral, Victor Christopher. "Using simulation to estimate probability density functions of bound water molecules with DSI." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/41684.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2007."June 2007." Leaves unnumbered.
Includes bibliographical references (leaves [58]-[59]).
In order to explore the physical basis by which high resolution diffusion imaging derives information about fiber alignment and diameter, we simulated a model diffusion experiment employing a random walk paradigm. A simulation of a model diffusion spectrum imaging experiment was written in Java in order to compare the diffusive behavior of particles in a perfectly reflecting channel with the internal compartment of the myofibers contained in an imaged mouse tongue. The simulated probability distribution function (PDF) for diffusion was specifically employed to estimate the myofiber diameter for the cells imaged by tissue imaging of the tongue by DSI. Our group performed a DSI experiment on a mouse tongue with a 4.7 Tesla MRI spin echo experiment in order to reconstruct a set of PDFs for the diameter, which closely correlated with the actual values for cell diameter obtained by 3D microscopic visualization through two photon microscopy of the same tissue. These results provide method for estimating myofiber diameter through the properties of the diffusion PDF obtained by whole tissue magnetic resonance imaging.
by Victor Christopher Cabral.
S.B.
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Holm-Petersen, Christina. "Stolthed og fordom kultur- og identitetsarbejde ved skabelsen af en ny /." København : DSI - Institut for Sundhedsvæsen, 2008. http://www.dsi.dk/Publikationer/DSI-rapporter/2008.01/CHP_Stolthed_og_fordom_til_hjemmeside.pdf.
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Edwards, Roland. "'Machines and people' : the evolution of industrial ergonomics in the mid-twentieth century." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/amachines-and-peoplea--the-evolution-of-industrial-ergonomics-in-the-midtwentieth-century(0d722387-3ade-4286-9d46-15521eb37272).html.
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The severe balance of payments crisis of 1947 threatened the Labour administration's ability to fund the totality of its post-war reconstruction programmes. The government's solution was to call for an increase in individual and collective industrial productivity to boost exports and increase income. One of their initiatives was the launch of an industrial human science research programme. The expectation was that this would yield information and techniques which would increase human efficiency and, hence, productivity, on the shop floor and in management. The human science research programme, which comprised both ergonomics and human relations studies, was of low financial value and produced knowledge and techniques that were capable of supporting an array of non-human science technologies. This thesis examines the derivation and management of the human science research programme and how this contributed to the emergence, growth and shaping of ergonomics, the study of the worker in their working environment. By tracing the development and growth of the human science research programme, I show how the learned society for ergonomics, the Ergonomics Research Society (ERS), played a marginal role in promoting the science. Instead, it was the actions of engineers in academia, and organisations such as the Department of Science and Industrial Research (DSIR), Medical Research Council (MRC) and the Trades Union Congress (TUC), that were responsible for the institutionalisation and professionalisation of ergonomics in the middle years of the twentieth century. This study also throws new light on the management of a low-value research programme during this period by showing how the level of responsibility was delegated down from central government to committees which comprised academics, industrialists and union officials only. I argue that this resulted in a flexible and agile research programme which addressed important issues of productivity and shaped the science of ergonomics.
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Valenzuela, Núñez Félix Rubén. "Estimación de la producción en sector Diablo Regimiento, mina El Teniente, mediante simulación a eventos discretos." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/145208.
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Ingeniero Civil de MinasEn las minas explotadas mediante el método de Block / Panel Caving, el carguío y el transporte de mineral es una de las principales operaciones que definen la productividad y que al mismo tiempo posee una gran cantidad de interferencias operacionales, las cuales son causadas por fallas, mantenciones y desviaciones propias del proceso de extracción, generándose de esta forma la necesidad de poder estimar la certeza que poseen los planes de producción, tomando en consideración la variabilidad del proceso minero. Como respuesta a esta necesidad, la simulación de eventos discretos se presenta como una herramienta de alto potencial para modelar las distintas problemáticas, permitiendo representar el proceso minero de manera robusta y confiable. En este trabajo se utiliza la herramienta computacional DSim con el objetivo de simular el sector Diablo Regimiento de la Mina el Teniente, a fin de validar el modelo creado para el manejo de materiales mediante equipos LHD s en el Nivel de Producción y la utilización de correas en el Nivel de Transporte Intermedio, que recoge las prácticas operacionales directamente como información de entrada para la simulación. El modelo propuesto busca una integración efectiva entre las herramientas de planificación utilizadas en la actualidad por la División El Teniente de Codelco para el método de explotación Panel Caving en su variante avanzada, considerando la base de datos histórica de fallas, reparaciones, frecuencia de colgaduras y reportes de producción de la mina, además de incluir de manera explícita la lógica de operación y la interacción entre el nivel de producción, chancadores y nivel de transporte intermedio (nivel de correas). Los principales resultados del estudio muestran una alta correlación entre la simulación y la realidad, logrando un error relativo que no supera el 10%. De esta manera la simulación permite identificar las principales interferencias que existen en el manejo de materiales, siendo ésta la asignación de equipos LHD a las distintas calles y fases de la mina. También se identifica que el hecho de permitir sobre extracción en el modelo, permite que se represente la variabilidad que existe en la operación de la mina. Adicionalmente se evaluó la capacidad productiva total del sistema de correas que posee el sector, simulando un periodo de 3 meses con alimentación continua a cada una de éstas, llegando a la conclusión de que este sistema no es un limitante en el manejo de materiales ya que posee una capacidad de 33,000 tpd, que es mayor a las 20,550 tpd requeridas para el año 2017. De esta manera, el modelo permite identificar las principales condiciones del proceso minero, generando intervalos de confianza para el plan de producción, lo cual permite ajustar la estrategia de operación y estimar su efecto en el plan global.
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Sánchez-Alvarez, Leticia. "Planar Cell Polarity Genes prkl-1 and dsh-1 Polarize C. Elegans Motorneurons during Organogenesis." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23513.
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The correct polarity of a neuron underlies its ability to integrate precise circuitries in
the nervous system. The goal of my thesis was to investigate the pathways that establish and
maintain neuron polarity/orientation in vivo. To accomplish this, I used bipolar VC4/5 motor
neurons, which innervate the C. elegans egg-laying musculature, as a model system. Vulval
proximal VC4/5 neurons extend axons in the left-right (LR) orientation, around the vulva;
whereas vulval distal VC1-3,6 neurons extend axons along the anterior-posterior (AP) axis.
A previous study showed that vang-1, a core planar cell polarity (PCP) gene, suppresses AP
axon growth in VC4/5 neurons. In order to identify new components of this pathway we
performed genetic screens for mutants with abnormal VC4/5 polarity/morphology. We
isolated and mapped alleles of farnesyl transferase b (fntb-1) and of core PCP genes, prickle-
1 (prkl-1) and dishevelled-1 (dsh-1); all of which display tripolar VC4/5 neurons, similar to
vang-1 lof. In prkl-1 and dsh-1 mutants, primary LR and ectopic AP VC4/5 axons are born
simultaneously, suggesting an early role in establishing polarity. In addition, prkl-1 and dsh-1
act persistently to maintain neuron morphology/orientation. Genetic analysis of double
mutants suggests that prkl-1 interacts with vang-1 in a common PCP pathway to prevent AP
axon growth, while dsh-1 also acts in a parallel pathway. Furthermore, prkl-1 functions cell
autonomously in neurons, whereas dsh-1 acts both cell autonomously and cell nonautonomously
in epithelial cells. Notably, prkl-1 overexpression results in unipolar VC4/5
neurons, in a dose-dependent manner. In contrast, dsh-1 overexpression in VC4/5 neurons
results in a lof phenotype, similar to vang-1 lof and overexpression phenotype. Remarkably,
prkl-1 overexpression restores normal VC4/5 polarity in dsh-1 and vang-1 mutants, which is
suggestive of a downstream role for prkl-1. Both PRKL-1 and DSH-1 are expressed in
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uniformly distributed puncta at the plasma membrane of VC4/5, similar to VANG-1;
suggesting that their asymmetric distribution is not critical for neuron polarity. Furthermore,
we found that the vulva epithelium induces prkl-1 expression in VC4/5; indicating a
functional relationship between the egg-laying organ and neuron morphology. Moreover, a
structure-function analysis of PRKL-1 revealed that the conserved PET domain and the Cterminal
region are crucial to prevent AP axon growth, whereas the three LIM domains are
dispensable for this role. In addition, we showed that dsh-1 also regulates the morphology of
AP-oriented PDE neurons. dsh-1 promotes the formation of PDE posterior axons, contrary to
its function in VC5 neurons; which indicates a context-dependent role for dsh-1 in neuronal
polarity. Altogether, this thesis implicates the PCP signalling pathway in a previously
unknown role, in establishing and maintaining neuronal polarity, by controlling AP axon
growth in response to organ-derived polarizing cues.
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Dunsmore, Moira Elizabeth. "An invisible disability: navigating the enduring state of dual sensory impairment (DSI) in older age." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29262.
Full textAbstract:
Dual sensory impairment (DSI) is a combination of vision and hearing impairment or loss, which varies in severity and is particularly prevalent in older age. DSI is a unique disability that sits at the intersection of ageing and disability, a complex medical issue with profoundly social consequences that has received little attention in health policy or disability research and practice. DSI presents significant challenges to older adults, their families and those with whom they interact, and despite its growing global prevalence, is underexplored in extant literature.
This study uses grounded theory to explore the social meaning and experiences of older adults with DSI and their family carers in Australia. Multiple physical, social and emotional impacts of DSI contribute to reduced social participation and declining availability of social networks. Critically, smaller social networks reduce access to resources and support, with the spouse, or significant other, becoming the main locus of support and, by default, social engagement. Using Charmaz’s constructivist grounded theory methodology, this thesis examines the dyadic, that is, the interrelated, social experiences of two persons in a DSI context, through the narratives of both older adults with DSI and their family carers (n=23), to extend current and develop new understandings of the meaning and experiences of DSI in a social context.
Findings from this study establish that the social experience of DSI can be understood as a series of asynchronous transitions and shared experiences that occur between the older person with DSI and their family carer. These findings are conceptualised as an ‘enduring state’, which represents the interrelated and embedded actions involved in the daily life work of DSI.
This research draws attention to the hidden arduous ‘lines of work’ shared by both those with DSI and their family carers, specifically the social work of DSI. This social line of work reflects experiences of social exclusion and poor recognition of DSI at micro, meso and macro levels of society. The age of participants, their associated co morbidities and declining personal agency impact access to the limited resources, support and information available, despite significant effort on their part. Complex processes of emotional and interactional disconnection are characterised by social loss, social effort and social isolation, shaped by changing roles and asynchronous adaptation to living with DSI.
Caring in this context is often predominantly social and ‘invisible’. To reduce the social effort of their family member with DSI and to maintain their own self-identity, family carers in this context adopted a ‘conscious caring’ approach. This is conceptualised in this thesis as an approach to caring that accounts for the subtle and enduring shared impacts of DSI. The power of ‘conscious’ in this context is the level of understanding of DSI that empowers family carers to recognise the shared elements of DSI and facilitate better articulation of needs to engage others within their care network. Caring was multifactorial with key characteristics of negotiation, facilitation, guardianship and creating opportunities. These caring characteristics were dynamic and strategic in that family carers sought opportunities that were mutually beneficial. Conscious caring contextualises the capacity of family carers to access resources embedded in their social networks by bridging the gap between the dyad (close ‘bonding’ ties) and broader social networks (i.e. weaker, ‘bridging’ and more diverse networks). Social capital is a critical factor in DSI; it is defined in this thesis as the flow of resources (such as social support, health information) via social networks at a personal and interpersonal level. A reduction in both bonding and bridging networks limits personal, social and psychosocial resources and impacts the capacity of the dyad to renegotiate their roles, create and maintain their individual and shared social networks, and successfully transition to living with DSI.
This study adopts a novel approach to understanding the social experiences of DSI from the ‘ground up’, that is, from the perspectives of older adults with DSI and their family carers. The shared experiences of DSI suggest that a socially inclusive, relational and interdisciplinary approach to future service, research and practice has merit in bridging the social gap that currently exists in the care and support available to the DSI family.
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Martin, Wayne R. "C3 interoperability issues: an overview of GOSIP network conformance testing in the evolution of the Defense Information System Network (DSIN)." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23604.
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Approved for public release; distribution is unlimitedThis thesis analyzes some of the evolving commercial-off-the-shelf (COTS) technologies and potential difficulties in implementing the proposed Defense Information System Network (DSIN) based on Government Open Systems Interconnection Profile (GOSIP) compliance and Integrated Services digital Network (ISDN) conformance testing. It starts by examining the MILDEPs Command, Control and Communications (C3) network architectures by providing brief descriptions of the various standards. Not only does it examine such technologies as Fiber Distributed Data Interface (FDDI), Synchronous Optical Network (SONET), Fast Packet Switching (FPS), and Broadband ISDN, but it also highlights some of the ISDN conformance test suites with a view toward migrating these architectures and technologies to the DISN. Results indicate that incompatibilities between C3 networks will be impacted more in the DISN near term and transition phases than in the far term. This is due in part to embedded proprietary functions permeating COTS products and the lack of fully developed ISDN conformance test specifications. The lack of clearly defined standards is a major cause of proprietary implementations. Coupled with the limited availability of ISDN conformance test suites to test multi-vendored MILDEP networks, this will make deployment of the DISN a challenge. Recommendations for further research are also presented.
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Mazhar, Ahmad Abdel Jabbar Ahmad. "Efficient compression of synthetic video." Thesis, De Montfort University, 2013. http://hdl.handle.net/2086/9019.
Full textAbstract:
Streaming of on-line gaming video is a challenging problem because of the enormous amounts of video data that need to be sent during game playing, especially within the limitations of uplink capabilities. The encoding complexity is also a challenge because of the time delay while on-line gamers are communicating. The main goal of this research study is to propose an enhanced on-line game video streaming system. First, the most common video coding techniques have been evaluated. The evaluation study considers objective and subjective metrics. Three widespread video coding techniques are selected and evaluated in the study; H.264, MPEG-4 Visual and VP- 8. Diverse types of video sequences were used with different frame rates and resolutions. The effects of changing frame rate and resolution on compression efficiency and viewers' satisfaction are also presented. Results showed that the compression process and perceptual satisfaction are severely affected by the nature of the compressed sequence. As a result, H.264 showed higher compression efficiency for synthetic sequences and outperformed other codecs in the subjective evaluation tests. Second, a fast inter prediction technique to speed up the encoding process of H.264 has been devised. The on-line game streaming service is a real time application, thus, compression complexity significantly affects the whole process of on-line streaming. H.264 has been recommended for synthetic video coding by our results gained in codecs comparative studies. However, it still suffers from high encoding complexity; thus a low complexity coding algorithm is presented as fast inter coding model with reference management technique. The proposed algorithm was compared to a state of the art method, the results showing better achievement in time and bit rate reduction with negligible loss of fidelity. Third, recommendations on tradeoff between frame rates and resolution within given uplink capabilities are provided for H.264 video coding. The recommended tradeoffs are offered as a result of extensive experiments using Double Stimulus Impairment Scale (DSIS) subjective evaluation metric. Experiments showed that viewers' satisfaction is profoundly affected by varying frame rates and resolutions. In addition, increasing frame rate or frame resolution does not always guarantee improved increments of perceptual quality. As a result, tradeoffs are recommended to compromise between frame rate and resolution within a given bit rate to guarantee the highest user satisfaction. For system completeness and to facilitate the implementation of the proposed techniques, an efficient game video streaming management system is proposed. Compared to existing on-line live video service systems for games, the proposed system provides improved coding efficiency, complexity reduction and better user satisfaction.
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Beckman, Bradley. "Ronald Stevenson's Passacaglia on DSCH: Understanding the Composer's Unique Approach to Large-Scaled Structure, a Lecture Recital, together with Three Recitals of Selected Works of L.V. Beethoven, J. Brahms, F. Liszt, F. Mendelssohn, B. Bartók and Others." Thesis, University of North Texas, 1994. https://digital.library.unt.edu/ark:/67531/metadc279229/.
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This paper investigates Ronald Stevenson's unique treatment of large-scaled structure in his Passacaglia on D S C H. This piece's unusual eighty-minute length, use of traditional forms and unusual piano techniques, musical references to other cultures and a massive triple-fugue over a ground bass will be examined as they relate to its overall form. The elements of rhythm, melody/mode, harmony, counterpoint, piano techniques, and tonality are also used as means of highlighting many unifying elements of the piece which contribute to its overall cohesiveness. Tributes to other composers, among them Dimitry Shostakovich to whom the piece is dedicated, are discussed in addition to many references to world cultures and events which support Stevenson's views on what he terms world music. Rarely is a piece written that encompasses such a wide range of musical elements that possess the ability to engage an audience for an uninterrupted length of eighty-minutes. As of yet, an in-depth scholarly investigation of Stevenson's treatment of formal unity in this landmark piano work has not been done. This analysis reveals Stevenson's approach to composing in such a large form, as well as illustrating his mastery of variation, counterpoint and unending ingenuity for innovative piano techniques. The composer's background and philosophies are discussed as well as the major impact made on his compositional style by both Percy Grainger and Ferruccio Busoni.
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Hidalgo, Sánchez Tomás Eulogio. "Análisis comparativo de software para simulación en minería subterránea." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/146287.
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Ingeniero Civil de MinasLa pequeña y mediana minería son sectores con múltiples desafíos en aspectos de seguridad, reducción de costos y aumentos de producción. Los desafíos relacionados a costos y producción pueden ser atendidos con la incorporación de la planificación y simulación minera. Por estos motivos surge la importancia de buscar y/o implementar nuevos software de simulación que puedan ser adquiridos a un menor precio pero que sigan cumpliendo con las expectativas de los software tradicionalmente usados. Debido a esto, el objetivo de esta memoria es realizar una comparación técnica entre los programas de simulación ProModel y Delphos Simulator (DSim), orientada principalmente a la velocidad de ejecución, flexibilidad y facilidad de uso de ambos software. El propósito es buscar nuevas alternativas a software frecuentemente utilizados en minería, que requieren de un mayor presupuesto para adquirirlos. La validación de los modelos se hizo comparando el modelo generado en DSim y el generado en ProModel, lo que entregó una diferencia del 0.03% en la producción lograda por ambos software. El motivo de esta diferencia se debe en cierta medida al layout, al recorrido realizado por los LHDs y la cantidad de decimales que soportan ambos software. Para modelos con pocas variables, como el caso de estudio, ProModel tiene tiempos de corrida de simulación al menos 6 veces menores que los logrados en DSim y menor utilización de recursos (procesador) del equipo. DSim ofrece mucha flexibilidad, pero que requiere de altas habilidades de programación para construir un modelo en un tiempo razonable. DSim es mucho mejor para modelar sistemas de gran tamaño o que poseen un layout cambiante en el tiempo, ya que es más fácil reutilizar códigos e ir implementando los nuevos sobre el modelo preconstruido. En cambio, ProModel es mucho mejor para modelar sistemas pequeños debido a que el software cuenta con una interfaz de botones y elementos de simulación que facilitan la construcción de los modelos, además de que el layout de una mina puede ser importado fácilmente. Para el caso de estudio considerado es mejor ProModel. Si el layout fuera pequeño pero existiera una alta cantidad de tareas o interacciones de equipos, ya sea entre LHDs, equipos de preparación u otros, DSim sería más útil ya que la flexibilidad que posee permite abordar el modelo se simulación de diferentes maneras. No se puede indicar con certeza cuál de estos software es mejor, sino que dependiendo de las necesidades del usuario, se debe definir cuál software es más útil o más práctico para realizar un modelo de simulación.
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Bleiweiss, Michelle L. "The Relationship Between Self-Perceived Benefit as Measured by the APHAB, COSI and CPHI and the Presence of APD in an Elderly Population." Scholar Commons, 2001. https://scholarcommons.usf.edu/etd/1514.
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The self-perceived hearing aid benefit of 38 participants was examined. Of the 38 subjects, 8 were found to have an auditory processing disorder as measured by the Dichotic Sentence Identification (DSI). When compared to the non-APD subjects, there were essentially no significant differences on the APHAB or COSI outcome measures. However, two of the 5 scales of the CHPI did show significant differences. In conclusion, these results do not support the notion of APD having a negative effect on hearing aid benefit. No finding in this study was robust and although there were several trends supporting that APD may impede an individual from receiving their full potential of benefit, this finding is not necessarily so.
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Frank, Lisa Lucie [Verfasser]. "Die Bedeutung der Proteine BamC, HlpA, DsbB, DsbH und DsbA1 für die Integrität der Außenmembran von Pseudomonas aeruginosa / Lisa Lucie Frank." Tübingen : Universitätsbibliothek Tübingen, 2020. http://d-nb.info/122345116X/34.
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Pedraza, Castillo Daniel Alejandro. "Simulación y comparación de desempeño de algoritmos de despacho en minería a cielo abierto." Tesis, Universidad de Chile, 2019. http://repositorio.uchile.cl/handle/2250/171055.
Full textAbstract:
Memoria para optar al título de Ingeniero Civil de MinasLa minería es un proceso productivo que busca obtener beneficio económico de mineral in situ. Para chile es una importante actividad económica que aporta un 11% al PIB del país. El método de explotación a cielo abierto busca extraer el mineral de manera descendente, este método se enfrenta al crecimiento de las distancias de acarreo mientras la operación avanza, haciendo que los costos de transporte puedan llegar a ser el 60% de los costos operativos totales. La simulación es un instrumento que permite la evaluación de distintos escenarios a bajo costo, en este trabajo se simulan las operaciones de carguío y transporte de una mina sintética a cielo abierto. Por medio de la simulación se prueban dos algoritmos de despacho (despacho priorizado y despacho optimizado) en escenarios con distintos layout y Budget, para evaluar su desempeño en cuanto a cumplimiento del plan minero; y así determinar el óptimo para cada caso. El despacho priorizado busca disminuir el retraso del plan y se destaca por su fácil implementación y sus resultados casi instantáneos, por otro lado, el despacho optimizado busca maximizar el movimiento mineral, pero puede requerir un gran tiempo para generar su solución. Del estudio se obtiene una preferencia por parte de ambos despachos hacia las rutas más cortas y rutas con mayor requerimiento de movimiento de mineral. La preferencia del despacho optimizado por estas rutas es mayor, enviando más camiones de los necesarios para lograr su Budget y dejando con déficit de camiones a las otras rutas. Mientras que el despacho optimizado logra siempre una mayor producción, el despacho priorizado logra un mejor cumplimiento de los planes mineros en los escenarios con déficit de camiones. La eficiencia de las políticas de despacho es uno de los aspectos que determina el costo de transporte, en este trabajo se pudo observar diferencias en las ganancias desde 100,000 a 200,000 USD al día dependiendo del sistema de despacho utilizado. Finalmente, se concluye que la eficacia del sistema de despacho depende de las circunstancias particulares de la operación y su enfoque debe ser tal que alinee de la mejor forma con el objetivo estratégico de la empresa. Los sistemas de despacho analizados tienen dos objetivos distintos y dos métodos de obtención de la solución distinta, esto los hace completamente diferentes, pero si se busca combinarlos, la forma es utilizando el método de resolución de despacho optimizado, y modificando su función objetivo para que incorpore también el objetivo del despacho priorizado.
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Alloing, Camille. "Processus de veille par infomédiation sociale pour construire l'e-réputationd'une organisation. Approche par agents-facilitateurs appliquée à la DSIC de La Poste." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT4021/document.
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Cette recherche-action menée au sein de la DSIC de La Poste s’intéresse à la réputation des organisations et à son pendant numérique (l’e-réputation) par le prisme des sciences de l’information-communication. Elle propose le développement d’un processus et d’un dispositif de veille stratégique par infomédiation sociale permettant à une organisation d’évaluer, de gérer et in fine de construire son e-réputation.Dans un premier temps, nous présentons un cadre théorique de la réputation des organisations comme objet info-communicationnel. Puis nous abordons l’e-réputation (ou réputation en ligne) des organisations comme une information stratégique constituée de l’ensemble des indicateurs issus de la commensuration des interactions intentionnelles endogènes ou automatisées des communautés virtuelles avec l’organisation : productions d’opinions, notations ou encore agir des publics.Dans un deuxième temps, nous nous questionnons sur les moyens à disposition du groupe La Poste pour construire cette e-réputation. Par « construction », nous entendons la manière de structurer l’environnement informationnel dans lequel les publics de l’organisation évoluent chaque jour sur le web dit social, et plus spécifiquement sur la plate-forme Twitter. Dans ce cadre, nos observations empiriques nous permettent de mettre en exergue, de questionner et d’analyser des utilisateurs du web dont les pratiques informationnelles nous amènent à les qualifier « d’agents-facilitateurs », et dont la caractéristique principale est de participer à la prescription informationnelle et à la médiation documentaire sur le web.Suite à l’observation de certains de ces agents et à la production d’une typologie, nous proposons un modèle et un processus de veille les intégrant. Processus dont les résultats opérationnels au sein de La Poste mettent en avant la nécessaire prise en compte et analyse des pratiques de recommandation des internautes au sein des réseaux socionumériques afin que l’organisation construise son e-réputation de manière proactiveThis research within La Poste's DSIC is focused on corporate reputation and on e-reputation through the prism of information and communication sciences. It proposes the development of a web monitoring and a social search process enabling to assess, manage and build online reputation.At first, we present a theoretical framework for corporate reputation as an info-communicational object. Then we discuss corporate e-reputation such as a strategic information made up of all commensuration indicators constituted by intentional (endogenous or not) interactions with the virtual communities and the firm : productions of opinions, assessment or public behavior.In a second step, we investigate how La Poste group can build its e-reputation. By "build" we mean the way to structure the informational environment where customers evolve each day on social web, and more specifically on the Twitter platform. In this context, our empirical observations allow us to highlight, question and analyze, web users whose informational practices permit us to qualify of "facilitators-agents", and whose main characteristic is to participate in informational prescription and the documentary mediation on the web.After the observation of some of these agents and the production of a typology, we propose a model and a monitoring process to integrate them. Our process's results in La Poste show the need to take into account and analyse recommendation practices on social networks to build corporate e-reputation proactively
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Kjellberg, Pia Kürstein. "Klinisk praksisvariation og kliniske retningslinjer i sociologisk nyinstitutionelt perspektiv." København : DSI, 2006. http://www.dsi.dk/Publikationer/DSI-rapporter/2006.10/DSI_2006_10_til%20web%20ny.pdf.
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Lavoie, Caroline. "Développement et validation de l’échelle de gravité de l’ataxie récessive spastique de Charlevoix-Saguenay (DSI-ARSACS) : section pyramidale." Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/8077.
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Résumé : Introduction : L’ataxie récessive spastique de Charlevoix-Saguenay (ARSCS) est une maladie héréditaire dégénérative présentant un taux élevé de porteurs (1/22) au Saguenay-Lac-Saint-Jean, mais aussi retrouvée à l’échelle mondiale. Les personnes atteintes présentent des atteintes cérébelleuses (ataxie), neuropathiques (amyotrophie) et pyramidales (spasticité). L’ARSCS présente un portrait différent des autres types d’ataxies et il n’existe pas d’échelle de gravité spécifique pour évaluer la progression de la maladie ou évaluer l’efficacité d’un traitement. Méthodologie : Les objectifs de ce projet sont de développer et documenter les qualités métrologiques des items de la section pyramidale de l’échelle de gravité de l’ARSCS (Disease Severity Index for Autosomal Recessive Spastic Ataxia of Charlevoix-Saguenay, DSI-ARSACS). La section pyramidale a été élaborée à l’aide du modèle de développement de Streiner et Norman (2008). La planification et la construction ont été réalisées à l’aide d’une recension systématique des écrits et d’une consultation Delphi. La validité de construit (convergente et discriminatoire) et la fidélité (intraévaluateur et interévaluateurs [n=2]) ont été documentées. Vingt-huit (28) participants âgés de 18 à 59 ans ont été recrutés, selon un échantillonnage stratifié pour l’âge et le sexe. Le diagnostic devait être confirmé génétiquement. La validité convergente a été documentée avec des outils évaluant le contrôle moteur aux membres inférieurs (LEMOCOT), la gravité de la spasticité (SPRS), la mobilité (6MWT, 10mWT, échelle de Berg), le fonctionnement dans les activités quotidiennes (Index de Barthel), la participation sociale (MHAVIE) et la qualité de vie (SF-12v2). La validité discriminatoire a été documentée selon le sexe, le groupe d’âge et le stade de la maladie. La section pyramidale a été administrée à trois reprises par deux physiothérapeutes, à deux semaines d’intervalle, pour évaluer la fidélité intra/interévaluateurs.
Résultats : La validité de contenu a été jugée adéquate par les experts du domaine. La validité de construit convergente est soutenue par des corrélations élevées avec les outils mesurant des concepts apparentés (r > 0,7, p = 0,00), à l’exception du SF-12v2 (r = 0,09-0,33). La validité de construit discriminatoire est appuyée par la capacité de distinguer les personnes atteintes en fonction des groupes d’âge et des stades de la maladie. La fidélité intra/interévaluateurs est excellente pour les items individuels (κ[indice inférieur w] = 0,68-0,96/0,60-0,95 sauf pour deux items κ[indice inférieur w] = 0,12 et 0,47) et pour le sous-total pyramidal (CCI = 0,94/0,88, p = 0,000). La cohérence interne (α = 0,85) témoigne de l’homogénéité des items pyramidaux.
Conclusion : Le sous-total pyramidal du DSI-ARSACS a démontré une excellente validité de construit convergente et discriminatoire et une bonne fidélité. L’échelle de gravité permettra de mieux documenter l’évolution naturelle de la maladie.Abstract : Introduction: Autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS) is a hereditary and degenerative illness that has a high carrier rate (1/22) in Saguenay-Lac-St-Jean (Quebec, Canada) but that is also found elsewhere around the world. Individuals with ARSACS have cerebellar impairments (ataxia), neuropathic impairments (amyotrophy) and pyramidal impairments (spasticity). ARSACS does not have the same characteristics as other forms of ataxia and there is currently no specific disease severity index (DSI) for it. Method: This project aimed to develop the items of the pyramidal section of the DSI-ARSACS and document their metrological properties. A literature review was conducted to identify ARSACS’ related impairments and existing scales measuring pyramidal impairments. Both items from known scales and new items were used to build a new scale that would assess the pyramidal impairments associated with ARSACS. The scale’s content validation was based on expert opinion. A consensus on the final scale composition was reached. Two physiotherapists administered the newly developed scale to 28 participants with a genetically confirmed ARSACS diagnosis in order to document the reliability of the pyramidal section of the DSI. Existing scales related to pyramidal impairments, mobility, social participation and quality of life were administered to assess convergent construct validity. The contrasting group method (age group, disease stage, gender) was used to assess discriminant validity. Results: Content validity was considered adequate by an expert panel that completed a Delphi process. The pyramidal section’s subscore was distributed normally and did not show a ceiling/floor effect. Convergent construct validity was supported by strong correlations with existing scales measuring related constructs (r > 0.7, p = 0.00), excluding SF-12 v2 (r = 0.09-0.33). Discriminant construct validity was supported by the scale’s ability to distinguish subjects according to age and disease stage. Intra/inter-rater reliability was excellent for individual items (κ[subscript w] = 0.68-0.96/0.60-0.95), except for two items (κ[subscript w] = 0.12 and 0.47), and also excellent for the section’s subscore (CCI = 0.94/0.88, p = 0.000). Internal consistency (α = 0.85) reflected the homogeneity of the pyramidal items. Conclusion: The pyramidal section’s subscore of DSI-ARSACS displayed excellent metrological properties (discriminative and convergent validity, reliability) during this initial validation. The index will lead to a better understanding of ARSACS’ natural history while also allowing for the categorization of subjects participating in future clinical trials.
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Lessard, Isabelle. "Développement et validation de l’échelle de gravité de l’ataxie récessive spastique de Charlevoix-Saguenay (DSI-ARSACS) : section cérébelleuse." Mémoire, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8165.
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Résumé : Introduction : L’ataxie récessive spastique de Charlevoix-Saguenay (ARSCS) est une maladie neuromusculaire héréditaire rare qui affecte notamment les voies spinocérébelleuses. Elle est caractérisée par une triple composante de signes et symptômes incluant l’ataxie et la dysarthrie (atteintes cérébelleuses), la spasticité aux membres inférieurs (atteintes pyramidales) et une faiblesse distale qui engendre des difficultés de préhension (atteintes neuropathiques). Des avancées récentes permettent de croire que des essais thérapeutiques seront bientôt possibles. Dans ce contexte, il est nécessaire de développer une échelle de gravité de la maladie pour permettre la sélection des patients et la documentation de l’histoire naturelle. But : L’objectif de ce projet était de développer les items de la section cérébelleuse du Disease Severity Index for Autosomal Recessive Spastic Ataxia of Charlevoix-Saguenay (DSI-ARSACS) et de documenter ses qualités métrologiques. Méthode : La section cérébelleuse a été élaborée à l’aide du modèle de développement de Streiner et Norman (2008) qui comprend trois grandes étapes : planification, construction et validation. La planification et la construction ont été réalisées à l’aide de consultations d’experts par la méthode Delphi et d’une recension systématique des écrits. La validité de construit (convergente et discriminatoire) et la fidélité (intra-évaluateur et inter-évaluateur) ont été documentées. Vingt-huit participants ont été recrutés selon un échantillonnage stratifié pour l’âge et le sexe. Ils devaient avoir un diagnostic confirmé génétiquement et être âgés entre 18 ans et 59 ans. La validité convergente a été documentée avec des outils évaluant les aptitudes motrices des membres supérieurs (9HPT, PPT, TDNS), la gravité de l’ataxie (SARA), la mobilité (6MWT, 10mWT, échelle de Berg), le fonctionnement dans les activités quotidiennes (Index de Barthel), la participation sociale (MHAVIE) et la qualité de vie (SF-12v2). La validité discriminante a été documentée selon le sexe, le groupe d’âge et le stade de la maladie. La section cérébelleuse a été appliquée à trois reprises par deux physiothérapeutes à deux semaines d’intervalle pour évaluer la fidélité intra et inter-évaluateurs. Résultats : La section cérébelleuse comporte 6 items d’évaluation liés aux fonctions motrices du cervelet. Le sous total de la section cérébelleuse est fortement corrélé avec la majorité des outils d’évaluation (r ≥ 0,69, p = 0,00), à l’exception du SF-12v2 (r ≤ 0,36, p ≥ 0,06). Une différence significative (p < 0,00) a été démontrée entre chaque groupe d’âge pour la majorité des items et le sous-total de la section cérébelleuse de l’échelle. Le résultat de chaque item et le sous-total de la section cérébelleuse augmentent significativement avec le stade de la maladie (p < 0,00). La fidélité intra et inter-évaluateurs correspond à un accord fort (κ ≥ 0,69) pour la majorité des items et le sous-total. Conclusion : Ce projet a permis de développer la section cérébelleuse de l’échelle de gravité DSI-ARSACS avec de bonnes qualités psychométriques (validité et fidélité). L’échelle pourra être utilisée dans le processus de catégorisation et d’évaluation des participants pour de futurs essais thérapeutiques.Abstract : Introduction: Autosomal Recessive Spastic Ataxia of Charlevoix-Saguenay (ARSACS) is a rare hereditary neuromuscular disease that mainly affects the spinocerebellar tract. It is characterized by a triad of signs and symptoms, including ataxia and dysarthria (cerebellum impairment), spasticity in the lower limbs (pyramidal impairment) and a distal weakness leading to prehension difficulties (neuropathic impairment). Recent research advances suggest that clinical trials may soon become possible. In this context, it is necessary to develop a disease severity index in order to select patients and document natural history of disease. Objective: The project aimed to develop the items of the cerebellar section of the Disease Severity Index for Autosomal Recessive Spastic Ataxia of Charlevoix-Saguenay DSI-ARSACS and document their metrological properties. Method: The cerebellar section was developed using the Streiner and Norman (2008) model, which involves three stages: planning, construction and validation. The planning and construction stages were conducted by carrying out a literature review, obtaining expert opinions and completing a Delphi process. Construct validity (convergent and discriminant) and reliability (intra- and inter-raters) were documented. Twenty-eight participants between the ages of 18 and 59 were recruited using a stratified sampling method based on age and gender. All of them had a genetically confirmed diagnosis of ARSACS. Convergent validity was documented with measurements of upper limbs motor abilities (9HPT, PPT, TDNS), ataxia severity (SARA), mobility (6MWT, 10mWT, Berg scale), functional status in activities of daily living (Barthel index), social participation (MHAVIE) and quality of life (SF-12v2). Discriminant validity was documented according to gender, age group and disease stage. The cerebellar section was administered three times, two weeks apart, by two physiotherapists to assess intra- and inter-rater reliability. Results: The cerebellar section includes 6 assessment items linked to cerebellum motor functions. The cerebellar section subscore was strongly correlated with the majority of assessment tools (r ≥ 0.69, p = 0.00), excluding SF 12v2 (r ≤ 0,36, p ≥ 0,06). A significant difference (p < 0.00) was observed between each age group for most items and the subscore of the cerebellar section. Results on each item and the subscore significantly increase with disease stage (p < 0.00). Intra- and inter-rater reliability reflects a strong level of agreement (κ ≥ 0.69) on the majority of items and the subscore. Conclusion: The cerebellar section of the DSI-ARSACS shows good psychometric properties (validity and reliability). The index can be used to categorize and assess future participants in clinical trials.
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Diana, Marco Alberto. "Charakterisierung von einer retrograden Modulation inhibitorischer synaptischer Transmission im Kleinhirn der Ratte." Doctoral thesis, [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=971021988.
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Zetterberg, Kristina. "High-Speed Downlink Shared Channel in Unlicensed Frequency Bands." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2175.
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In the standardized air interface for third generation mobile communication systems, WCDMA release 5, a concept called High Speed Downlink Packet Access (HSDPA) is introduced. HSDPA enables faster transmissions from base stations to mobile users by using a shared, high-capacity channel called the High-Speed Downlink Shared Channel (HS-DSCH) that is designed for best effort services. The HS-DSCH is developed for usage in the frequency band licensed for third generation communication systems. As the use of licensed frequency bands is costly it may be interesting to make use of the unlicensed frequency bands at 2.4 GHz and 5 GHz with higher interference and stricter regulations. Using HS- DSCH in unlicensed frequency bands would lead to smaller costs and a new kind of usage of the HS-DSCH.
In order to transmit in unlicensed frequency bands, some requirements set up by the public authorities must be followed. This means that the maximum transmit power used by the HS-DSCH must be decreased and, on the 5 GHz frequency band, that features to avoid disturbing radar systems have to be implemented. The HS- DSCH has a bandwidth of 5 MHz. To use the available frequency spectra more efficiently, multiple carriers could be used.
Wireless Local Area Networks (WLANs) are the most common way to transfer data in unlicensed frequency bands today. Assessments and simulations of WLAN and the HS-DSCH in unlicensed frequency bands show that WLAN can provide higher bitrates than the HS-DSCH for low loads. HS-DSCH can however provide a larger coverage per base station, and is more bandwidth effective than WLAN. Using a larger bandwidth is necessary for HS-DSCH to compete with WLAN, which uses a bandwidth approximately four times as large as the HS-DSCH bandwidth. The usage of the HS-DSCH in unlicensed frequency bands also has the advantage that the services provided by the third generation communication systems can be accessed easily.
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Eriksson, Jonas. "Providing Quality of Service for Streaming Applications in Evolved 3G Networks." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2177.
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The third generation, 3G, mobile telephone systems are designed for multimedia communication and will offer us similar services as in our stationary computers. This will involve large traffic loads, especially in the downlink direction, i.e. from base station to terminal. To improve the downlink capacity for packet data services a new concept is included in evolved 3G networks. The concept is called High Speed Data Packet Access, HSDPA, and provides peak bit rates of 14 Mbps. HSDPA uses a so-called best effort channel, i.e. it is developed for services that do not require guaranteed bit rates. The channel is divided in time between the users and a scheduling algorithm is used to allocate the channel among them.
Streaming is a common technology for video transmission over the Internet and with 3G it is supposed to become popular also in our mobiles. Streaming generates lots of data traffic in the downlink direction and it would thus be satisfying to make use of the high bit rates HSDPA provides. The problem is that streaming requires reasonable stable bit rates, which is not guaranteed using HSDPA. The aim of this study is to modify the scheduling algorithms to prioritise streaming over web users and provide streaming Quality of Service, QoS. QoS is the ability to guarantee certain transmission characteristics.
The results of the study show that it is hard to improve the streaming capacity by modifications of the scheduling. Of course, a consequence is that the web user throughput is decreased and to avoid this, new users have to be rejected by the admission control.The solution is to prioritise the streaming users both in the scheduling algorithm and in the admission control, i.e. when the system is nearly full new web users are rejected. By doing so the results are significantly improved.
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Alloing, Camille. "Processus de veille par infomédiation sociale pour construire l'e-réputation d'une organisation. Approche par agents-facilitateurs appliquée à la DSIC de La Poste." Phd thesis, Université de Poitiers, 2013. http://tel.archives-ouvertes.fr/tel-00915004.
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Cette recherche-action menée au sein de la DSIC de La Poste s'intéresse à la réputation des organisations et à son pendant numérique (l'e-réputation) par le prisme des sciences de l'information-communication. Elle propose le développement d'un processus et d'un dispositif de veille stratégique par infomédiation sociale permettant à une organisation d'évaluer, de gérer et in fine de construire son e-réputation. Dans un premier temps, nous présentons un cadre théorique de la réputation des organisations comme objet info-communicationnel. Puis nous abordons l'e-réputation (ou réputation en ligne) des organisations comme une information stratégique constituée de l'ensemble des indicateurs issus de la commensuration des interactions intentionnelles endogènes ou automatisées des communautés virtuelles avec l'organisation : productions d'opinions, notations ou encore agir des publics. Dans un deuxième temps, nous nous questionnons sur les moyens à disposition du groupe La Poste pour construire cette e-réputation. Par " construction ", nous entendons la manière de structurer l'environnement informationnel dans lequel les publics de l'organisation évoluent chaque jour sur le web dit social, et plus spécifiquement sur la plate-forme Twitter. Dans ce cadre, nos observations empiriques nous permettent de mettre en exergue, de questionner et d'analyser des utilisateurs du web dont les pratiques informationnelles nous amènent à les qualifier " d'agents-facilitateurs ", et dont la caractéristique principale est de participer à la prescription informationnelle et à la médiation documentaire sur le web. Suite à l'observation de certains de ces agents et à la production d'une typologie, nous proposons un modèle et un processus de veille les intégrant. Processus dont les résultats opérationnels au sein de La Poste mettent en avant la nécessaire prise en compte et analyse des pratiques de recommandation des internautes au sein des réseaux socionumériques afin que l'organisation construise son e-réputation de manière proactive.
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Svensson, Marlene. "A CFD Investigation of a Generic Bump and its Application to a Diverterless Supersonic Inlet." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12490.
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This is a Master Thesis done at the Swedish Defence Research Agency with the purpose to design and investigate how different geometries of a compression surface integrated with an intake affects the performance such as distortion, boundary layer diversion, pressure recovery and deceleration of speed.
The work was divided in two parts. In the first part, CFD calculations using the FOI developed Edge 4.1 code were made for the compression surfaces alone. In the second part the most promising design was integrated with an intake. Two more bumps with the intake were modelled and the three geometries were compared to the intake without bump. Surface flow, deceleration of Mach number, pressure recovery, mass flow, boundary layer diversion, lift and drag were the factors chosen to be examined, boundary layer diversion and pressure recovery being the two most vital.
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Bigi, Patrick. "A search for radio signatures of Dark Matter particles in the Draco dwarf galaxy." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25345/.
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Dark Matter is a fundamental component of the Universe both on Galactic
and cosmological scales, albeit its intrinsic nature is still largely unknown. Weakly
interactive massive particles (WIMPs) have been a long standing Dark Matter
particle candidate from the theory stand point, although they have not received
observational confirmation so far. Theoretical models suggest that WIMPs can
annihilate/decay into electron/positron pairs and, in the presence of magnetic
fields, such relativistic electrons would generate an observable synchrotron radio
emission that would be the footprint of the WIMP particle and its cross section.
In this thesis we present a search for the radio signature of Dark Matter
particles in the Draco dwarf spheroidal galaxy with Giant Metrewave Radio
Telescope observations. We analyzed observations from the GMRT, taken with
a large bandwidth around 650 MHz and with full array configuration in order to
obtain the maximum sensitivity. We used long baselines to identify and remove
compact sources, leading to a final image with 20.5′′ angular resolution and a
230 μJy beam−1 rms noise. We modeled the DM-induced synchrotron emission
in Draco in order to place constraints to the annihilation cross section from our
observations.
We found marginal evidence (σ = 1.97) of a diffuse signal over the whole field of
view that is unlikely due to DM but to residual artifacts left in the image after source
subtraction. We still present best fits on the annihilation cross section of WIMPs
assuming that the signal was due to DM. A best fit cross section of ∼10−23 cm3 s−1
is obtained at 100 GeV for different annihilation channels. We estimate the best
noise rms image that we could achieve with improved calibration/subtraction and
we use it to place upper limits near 2 ·10−24 cm3 s−1 on the DM cross section for
100 GeV particle mass. We discuss our result in the light of the current literature
constraints and explore alternative models for the theoretical emission.
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Reindahl, Rasmussen Susanne. "The lifetime costs of smoking and smoking cessation." København : DSI - Institut for Sundhedsvæsen, 2006. http://www.dsi.dk/Publikationer/DSI-rapporter/2006.01/Lifetime%20costs%20of%20smoking.pdf.
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Seran, Nhuoc Thuy. "Le rôle des "objets-frontières" dans le contrôle des organisations virtualisées sous multi-gouvernance : le cas de deux DSI bancaires mutualistes." Thesis, Montpellier 1, 2012. http://www.theses.fr/2012MON10034.
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Les organisations virtualisées sous multi-gouvernance sont des organisations co-gouvernées simultanément par plusieurs organisations indépendantes. Les distances organisationnelles et géographiques leur incitent à mettre en place des équipes virtuelles à grande échelle. Ces organisations des acteurs hétérogènes adoptent un mode de contrôle particulier riche d'enseignements pour la théorie du contrôle. En complément du contrôle interorganisationnel, leur système de contrôle est combiné d'un contrôle interactif informel. L'e-collaboration est le mode de travail essentiel. Les objets-frontières jouent un rôle important dans le contrôle interactif informel et dans l'e-collaboration des équipes au-delà des frontières organisationnelles, géographiques et temporellesVirtualised organizations with multi-governance are co-governed simultaneously by several independent organizations. Organizational and geographical distances encourage them to set up virtual teams on a large scale. These organizations adopt a particular control mode. In addition to the inter-organizational control, their control system is combined with an informal interactive control. The e-collaboration is their important way of work. The boundary objects play an important role in the and in the informal interactive control and in the e-collaboration, beyond organizational boundaries, geographical and temporal
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Missing, Cristina Cezara [Verfasser]. "Kohärenz und Komplexität : Eine empirische Untersuchung zur Rezeption von Konnektoren durch Nicht-Muttersprachler des Deutschen auf DSH-Niveau / Cristina Cezara Missing." Kassel : Kassel University Press, 2017. http://d-nb.info/1148694781/34.
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Zhao, Haichuan Jianqiu Wu. "Implementation and simulation of HSDPA functionality with ns-2." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2833.
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Enhanced packet-data access is a trend in third generation mobile communication system. WCDMA Release 5 introduces HSDPA (High Speed Packet Data Access) with a brand new downlink transport channel HS-DSCH (High Speed Downlink Shared Channel) into 3GPP specification to provide greater capacity. HS-DSCH supports some new feature such as fast link adaptation, fast scheduling and fast HARQ (hybrid ARQ) so as to increase system performance. It efficiently improves power utilization, shortens retransmission time and increases system throughput.
The focus for this thesis is implementation and simulation of HSDPA functionality with ns-2. There is some previous work has been done, such as EURANE. EURANE is an end to end extension which adds several HSDPA modules to ns-2. This paper addresses the analysis of HSDPA by simulating on HS-DSCH based on EURANE, and extends the power consumption on HS-DSCH.
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Chen, Liang. "Dynamical microstructure formation in 3D directional solidification of transparent model alloys : in situ characterization in DECLIC-DSI under diffusion transport in microgravity." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4363/document.
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Afin de clarifier et caractériser les mécanismes fondamentaux de formation des réseaux étendus cellulaires et dendritiques en régime diffusif, des expériences de solidification dirigée permettant l’observation in situ en temps réel de l’interface solide-liquide d’un alliage transparent ont été réalisées dans l’instrument « DECLIC-DSI» à bord de la Station Spatiale Internationale. Des procédures spécifiques d'analyse d'images ont été développées pour caractériser les réseaux et extraire des données de référence à comparer aux modèles théoriques ou numériques. Les mécanismes d’évolution et de sélection de l'espacement primaire sont décrits et reliés à la courbure macroscopique de l'interface qui apparait comme un paramètre important de la dynamique de réseau. L’obtention de réseaux homogènes étendus nous a permis d'observer des instabilités secondaires du régime cellulaire pour la première fois dans des systèmes tridimensionnels: Oscillation et multiplet structure. Nos analyses mettent en évidence l'absence de cohérence globale de l’oscillation, exceptée dans des zones localement ordonnées dans lesquelles les oscillations de cellules voisines peuvent être synchronisées. Dans une autre gamme de paramètres de contrôle, la formation de multiplets -autre type d'instabilité secondaire- a été observée. La structure et la dynamique de ces multiplets est décrite. Enfin, des essais comparatifs ont été réalisés au sol, pour les mêmes paramètres de croissance, afin de clarifier l'influence de la convection. Les différences entre les expériences au sol et en microgravité, en particulier concernant l'espacement primaire, sont reliées à l'amplitude de la convectionTo clarify and characterize the fundamental physical mechanisms active in the formation of three-dimensional (3D) arrays of cells and dendrites, in situ monitoring of series of experiments on a transparent alloy was carried out under low gravity in the DECLIC-DSI on-board the International Space Station. Image analysis procedures have been developed to characterize the patterns and get benchmark data to compare with theoretical or numerical modelling. The mechanisms of primary spacing evolution and selection are described and related to the macroscopic interface curvature that appeared to be a critical parameter. The extended homogeneous patterns obtained in microgravity enabled us to observe secondary instabilities of the cellular pattern for the very first time in 3D patterns: cell oscillation and multiplet structure. Our analyses highlight the absence of global coherence of cell oscillations, except in locally ordered areas where synchronization of neighbor cells may happen. In another range of control parameters, another type of secondary instability has been identified that corresponds to multiplet formation; the structure and dynamics of those multiplets are also described. Finally, comparative experiments have been performed on ground with similar growth parameters to point out the influence of convection. The differences between ground and microgravity results, especially regarding the primary spacing, are related to fluid flow magnitude
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Macedo, Bruno Armindo Rodrigues de Sousa. "Um modelo de arquitectura de Sistemas de Informação." Master's thesis, Instituto Superior de Economia e Gestão, 2009. http://hdl.handle.net/10400.5/1855.
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Mestrado em Gestão de Sistemas de InformaçãoAs universidades públicas devido às suas características funcionais e ao seu posicionamento na sociedade, estão sujeitas a possíveis alterações tanto internas, ao nível organizacional, como externas ao nível do ambiente socioeconómico onde estão inseridas. A globalização dos mercados e a transformação da sociedade académica, com as mudanças decorrentes do Processo de Bolonha, pressionam as universidades a reorganizar e redesenhar continuamente os seus processos e estratégias de negócio. Os sistemas tradicionais de informação para a gestão correm o risco de não darem as respostas necessárias a esse desafio, dado que apresentam várias debilidades e insuficiências estudadas academicamente. Neste estudo, após uma revisão da literatura, procura-se analisar o papel preponderante do uso de métodos para o desenvolvimento de uma Arquitectura de Sistemas de Informação. Tendo como base um estudo de caso na Direcção de Sistemas de Informação do Instituto Superior de Economia e Gestão, pretende-se mostrar que o desenvolvimento de uma Arquitectura de Sistemas de Informação, bem como a utilização das ferramentas informáticas neste processo permitiram uma melhor representação da realidade existente, assim como possibilitaram a melhoria sustentada dos respectivos processos organizacionais. O método utilizado apresenta também alguns aspectos inovadores relativamente à literatura existente, nomeadamente a integração da dimensão competências no modelo de Arquitectura de Empresa.
Public Universities, due to their functional characteristics and position in society, are subject to possible internal changes at organization level, and external changes in terms of the social-economic environment they are in. The market globalization and the transformation of the academic society, allied with the changes originated by the Bolonha Process, pressured on the on the Universities to reorganize and redraw continuously their processes and business strategies. The traditional information systems for management are in risk of not giving the necessary answers to this challenge, due to the fact that they show multiple insufficiencies and weaknesses studied academically. In this study, after a literature revision, it is seek to analyze the relevant part played by the use of new methods for the development of an Information Systems Architecture. Having a case study on the ISEG's Divisão de Sistemas de Informação (DSI) as the main bases for the study, it is intended to show that the development of an Information Systems Architecture, as well as the use of computer tools in this process, have led to a better representation of the existent reality, and made it possible for a improvement of the respective organizational processes. The method used presents also some innovating aspects relatively to the existent literature, namely the integration of the competences dimension in the Enterprise Architecture model.
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Sun, Xiaole. "Isotope-based reconstruction of the biogeochemical Si cycle : Implications for climate change and human perturbation." Doctoral thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-79188.
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The global silicon (Si) cycle is of fundamental importance for the global carbon cycle. Diatom growth in the oceans is a major sequestration pathway for carbon on a global scale (often referred to as the biological pump). Patterns of diatoms preserved in marine sediment records can reveal both natural and anthropogenic driven environmental change, which can be used to understand silicon dynamics and climate change. Si isotopes have been shown to have great potential in order to understand the Si cycle by revealing both past and present patterns of dissolved Si (DSi) utilization, primarily when diatoms form their siliceous frustules (noted as biogenic silica, BSi). However, studies using Si isotopes are still scarce and only a few studies exist where stable Si isotopes are used to investigate the biogeochemical Si cycle in aquatic systems. Therefore, this thesis focuses on developing analytical methods for studying BSi and DSi and also provides tools to understand the observed Si isotope distribution, which may help to understand impacts of climate change and human perturbations on marine ecosystems. The Baltic Sea, one of the biggest estuarine systems in the world, was chosen as the study site. BSi samples from a sediment core in Bothnian Bay, the most northern tip of the Baltic Sea, and diatom samples from the Oder River, draining into the southern Baltic Sea were measured and reported in Paper II and III, after establishing a method for Si isotope measurements (Paper I). Si isotope fractionation during diatom production and dissolution was also investigated in a laboratory-controlled experiment (Paper IV) to validate the observations from the field. The major result is that Si isotope signatures in BSi can be used as an historical archive for diatom growth and also related to changes in climate variables. There is isotopic evidence that the Si cycle has been significantly altered in the Baltic Sea catchment by human activities.At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Manuscript. Paper 4: Manuscript.
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Racunica, Illia. "Mécanismes de contrôle de Qualité de Service dans l'UMTS pour les applications IP." Paris, ENST, 2004. http://www.theses.fr/2004ENST0018.
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Les travaux de recherche présentés dans cette thèse portent sur la Qualité de Service (QoS) et l'allocation de ressources dans les réseaux UMTS-TDD. Les réseaux UMTS se composent de deux parties, une partie filaire qui peut être sous IP et peut utiliser Diffserv pour la gestion de la QoS, et une partie réseau d'accès radio (UTRAN) qui gère la transmission sur la partie radio. Nous avons d'abord proposé une méthode de transcription de la QoS Diffserv en QoS UMTS. Ensuite, nous avons réalisé une étude du comportement de l'UTRAN en fonction de l'état du canal radio. Cette étude a permis d'évaluer les délais de transmission, les taux de pertes et l'efficacité de différents paramétrages et ainsi de proposer un paramétrage de l'UTRAN adapté aux besoins de chaque type d'application. Nous avons également proposé un mécanisme de lien adaptatif qui permet d'accroître l'efficacité de notre système. Puis nous avons proposé un algorithme d'allocation en relation avec l'algorithme de contrôle d'accès pour les applications de type Temps Réel (RT). Cet algorithme permet d'indiquer les ressources attribuées à un utilisateur et d'équilibrer la puissance de transmission sur les différents slots ce qui accroît le nombre d'utilisateurs qui peuvent être présents simultanément. Pour le trafic Non Temps Réels (NRT) nous avons appliqué une politique d'ordonnancement qui préempte des flux en fonction de l'état du canal tout en restant équitable sur le long terme. Cet ordonnancement réduit le BLER. L'ordonnancement est couplé au contrôle d'accès, l'utilisation d'une ressource par du trafic NRT ne détériore pas le service du trafic RT au delà d'un certain seuilThe UMTS networks, third-generation mobile networks, will support high-speed multimedia services. This thesis concerns the UMTS-TDD with a radio access sub-system (UTRAN) directly connected to IPv6. The whole QoS is managed by the DiffServ protocol mechanisms. First, we propose a mechanism to map the DiffServ QoS to a UMTS DiffServ. Then, from this UMTS QoS, we propose a parameter tuning with respect to the QoS required by the applications that respects the delays and loss criteria. When several parameters tuning sche were possible, we selected the parameter that maximizes the system efficiency. Knowing that the most efficient parameter changes within channel characteristics, we have proposed and evaluated an adaptive tuning scheme that maximizes this efficiency. Then, we have considered a system combining Real-Time (RT) and Non Real-Time applications (NRT). In order to maintain the current applications QoS, we have applied an access control and resources allocation mechanism to the RT applications. The access control does not accept an application if there is not enough available resources or if the use of necessary resources for the new application will exceed a power threshold. The resources allocation mechanism allows by an appropriate (codes, power) combination, to decrease the amount of rejected real-time applications. Concerning the NRT applications, we propose a scheduling mechanism. It takes into account the channel state to select a flow. This will decrease the BLER. The scheduling is fair in the long term. Furthermore, the scheduling algorithm is linked to the access control in order to mix NRT and RT applications efficently
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Krmela, Tomáš. "Subjektivní hodnocení kvality videosekvencí." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219830.
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This master´s work is focused on the comparison of subjective assessment of the quality of video sequences. In this study, data are obtained by hardware and sofware techniques and they are compared. In the introduction, methods of video compressions are described. The main part of this work deals wtih the exploring of different methods of subjective assessment of the quality of video sequences. Finally, obtained results from different methods, are evaluated and discussed.
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Bleiweiss, Michelle L. "The relationship between self-perceived benefit as measured by the APHAB, COSI and CPHI and the presence of ADP in an elderly population. [electronic resource] / by Michelle L. Bleiweiss." University of South Florida, 2002. http://purl.fcla.edu/fcla/etd/SFE0000027.
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Professional research project (Au.D.)--University of South Florida, 2002.Title from PDF of title page.
Document formatted into pages; contains 34 pages.
Includes bibliographical references.
Text (Electronic thesis) in PDF format.
ABSTRACT: The self-perceived hearing aid benefit of 38 participants was examined. Of the 38 subjects, 8 were found to have an auditory processing disorder as measured by the Dichotic Sentence Identification (DSI). When compared to the non-APD subjects, there were essentially no significant differences on the APHAB or COSI outcome measures. However, two of the 5 scales of the CHPI did show significant differences. In conclusion, these results do not support the notion of APD having a negative effect on hearing aid benefit. No finding in this study was robust and although there were several trends supporting that APD may impede an individual from receiving their full potential of benefit, this finding is not necessarily so.
System requirements: World Wide Web browser and PDF reader.
Mode of access: World Wide Web.
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Jensen, Maja, and Madeleine Wendel. "”I can feel cold in a way...” Sjuksköterskors upplevelser av att vårda patienter som avsiktligt skadar sig själva." Thesis, Högskolan i Borås, Institutionen för Vårdvetenskap, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19171.
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Antalet patienter som vårdas på sjukhus i Sverige på grund av en avsiktlig självdestruktiv handling, har ökat under de senaste tio åren. Patienternas behov av vård kan variera och deras problem kan vara svåra att definiera i form sjukdomsdiagnoser. Förutsättningar för sjuksköterskan att upprätthålla en god vårdrelation kan påverkas och svårigheten att bedöma patienternas behov kan ge upphov till vårdlidande. Uppsatsens syfte är att beskriva sjuksköterskans upplevelser av att möta och vårda patienter som avsiktligt skadar sig själva. Materialet för studien utgörs av sju kvalitativa artiklar som bygger på intervjuer av sjuksköterskor, där upplevelser av att vårda den här patientgruppen beskrivs. Artiklarna har bearbetats genom en innehållsanalys av studiernas resultat. Det framgår här att sjuksköterskorna upplever många motstridiga känslor i vårdandet av patienter som avsiktligt skadar sig själva. Återkommande beskrivningar är upplevelser av frustration, osäkerhet, rädsla och även ilska. Utifrån vald analysmodell har de beskrivna känslorna analyserats utifrån likheter och skillnader och sammanförts genom tre nya teman med syftet att beskriva sjuksköterskans upplevelser; ”Otillräcklighet i yrkesrollen”, ”Svårigheter med ansvarstagande” och ”Frustration över att inte förstå”. I diskussionen sammankopplas studiens resultat med vårdvetenskaplig teori och författarnas egna tankar. Ett resonemang förs kring hur brist på förståelse för patienternas situation och problem kan påverka vårdrelationen. Sjuksköterskors upplevelse av osäkerhet gällande yrkeskunskaper och färdigheter, påverkar förutsättningarna för att se och bedöma patienternas behov. Osäkerheten kan leda till utebliven vård och på så sätt ge upphov till ett vårdlidande.Program: Sjuksköterskeutbildning
Uppsatsnivå: C
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Chen, Guangcheng. "Studies of an end-on inductively coupled plasma atomic emission spectrometer (ICP-AES) and a direct sample insertion inductively coupled plasma atomic emission spectrometer (DSI-ICP-AES)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40036.pdf.
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Paquette, Michael. "Modélisation locale en imagerie par résonance magnétique de diffusion : de l'acquisition comprimée au connectome." Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11179.
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L’imagerie par résonance magnétique pondérée en diffusion est une modalité d’imagerie médicale non invasive qui permet de mesurer les déplacements microscopiques des molécules d’eau dans les tissus biologiques. Il est possible d’utiliser cette information pour inférer la structure du cerveau. Les techniques de modélisation locale de la diffusion permettent de calculer l’orientation et la géométrie des tissus de la matière blanche.
Cette thèse s’intéresse à l’optimisation des métaparamètres utilisés par les modèles locaux. Nous dérivons des paramètres optimaux qui améliorent la qualité des métriques de diffusion locale, de la tractographie de la matière blanche et de la connectivité globale. L’échantillonnage de l’espace-q est un des paramètres principaux qui limitent les types de modèle et d’inférence applicable sur des données acquises en clinique. Dans cette thèse, nous développons une technique d’échantillonnage de l’espace-q permettant d’utiliser l’acquisition comprimée pour réduire le temps d’acquisition nécessaire.
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Coffineau, Nathalie. "Processus contrôlant la distribution des isotopes du silicium dissous (δ30Si) dans l'océan Atlantique et Indien." Thesis, Brest, 2013. http://www.theses.fr/2013BRES0067/document.
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L'utilisation des isotopes du silicium (δ30Si) comme proxy paléocéanographique nécessite une bonne connaissance de la répartition et du devenir des isotopes du silicium à travers l'océan. Au cours des dernières années, des efforts considérables ont été faits pour cartographier la composition isotopique du silicium dissous (acide silicique, DSi) et de la silice biogénique (BSi) dans l'océan. Les diatomées utilisent le DSi pour construire leur frustule fait d’opale (BSi). Durant ce processus, les diatomées discriminent l'isotope lourd de silicium (30Si) en faveur de l'isotope léger (28Si). Ce fractionnement conduit à une BSi qui a un δ30Si inférieur de 1,1 ‰ à 1,5 ‰ par rapport au DSi source. Cela se traduit dans les eaux de surface par de faibles concentrations en DSi en raison de l'utilisation biologique et par des valeurs de δ30Si élevées en raison de la distillation de Rayleigh. Inversement, lorsque la BSi se dissout, il y a une discrimination contre l’isotope lourd et ainsi produit du silicium dissous avec un δ30Si inférieur de 0,55 ‰. Dans le même temps, la circulation océanique et le mélange vertical contribuent à modifier le δ30Si du pool de silicium dissous dans la couche de surface, ce qui complique l'utilisation du δ30Si des diatomées comme proxy pour l’utilisation du DSi durant la saison de croissance. Cette thèse vise à mieux comprendre les processus qui régissent le cycle du silicium et la signature en δ30Si des masses d'eau dans les différentes régions de l'océan. De nouvelles données de δ30Si de silicium dissous sont présentées et discutées. Ces données proviennent de 6 profiles CTD de la campagne ANTXXIII/9 (Atlantique et secteur indien de l'océan Austral), 7 profiles CTD de la campagne ANTXXIV/3 (secteur Atlantique de l'océan Austral), et 5 profiles CTD de la campagne MSM10/1 (région subtropical et tropical de l’océan Atlantique nord). Les échantillons ont été purifiés par chromatographie échangeuse d'ions après préconcentration par précipitation de Mg(OH)2, et le silicium est extrait en utilisant du triéthylamine molybdate. Les analyses isotopiques ont été réalisées sur Spectromètre de Masse Multi-Collection à source Plasma (MC-ICP-MS, Naptune) à moyenne résolution (Ifremer, Brest)Use of silicon isotopes (δ30Si) as a paleoceanographic proxy requires sound knowledge of the distribution and behaviour of silicon isotopes throughout the ocean. Over the past few years considerable effort has been made to map the silicon isotope composition (δ30Si) of silicic acid (dissolved silicon, DSi) and biogenic silica (BSi) throughout the ocean. Diatoms uptake DSi to build up their opal frustules (BSi). During this process, diatoms discriminate against the heavier isotope of silicon (30Si) in favor of the light isotope (28Si). This fractionation leads to BSi that has a lower δ30Si than the DSi source by 1.1 ‰ to 1.5 ‰. In turn, this results in surface waters with low DSi concentrations due to biological removal, and high δ30Si values due to Rayleigh distillation. Conversely, when the BSi dissolves it is with discrimination against the heavier isotope producing dissolved silicon with a δ30Si lower by 0.55 ‰. At the same time, episodes of upwelling occurring throughout the growing season, ocean circulation and mixing, contribute to modify the δ30Si of the dissolved silicon pool in the surface mixed layer, which complicate the use of diatom δ30Si as a proxy for DSi removal during the growing season. This dissertation aims to better understand the processes driving the Si cycle and the δ30Si signature of water masses in different regions of the ocean. New data of δ30Si of dissolved Si are presented and discussed. These data come from 6 CTD profiles from ANTXXIII/9 campaign (Atlantic and Indian sector of the Southern Ocean), 7 CTD profiles from ANTXXIV/3 (Atlantic sector of the Southern Ocean), and 5 CTD profiles from the campaign MSM10/1 (north Subtropical and Tropical Atlantic Ocean). Samples were purified by ion-exchange chromatography following preconcentration via Mg(OH)2 precipitation and extraction of silicon using triethylamine molybdate. Isotopic analyses were carried on a Neptune MC-ICP-MS at medium resolution (Ifremer, Brest)
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Vogel, Stefan Verfasser], Werner [Akademischer Betreuer] [Hosemann, Bernhard Akademischer Betreuer] Lehnert, Werner [Gutachter] [Hosemann, and Ruth [Gutachter] Lang-Roth. "Dysphonie-Schweregrad-Index der Stimme (DSI) – Versuche zur Optimierung der Retest-Reliabilität durch eine veränderte Analyse von Frequenz-Unregelmäßigkeiten (Jitter) / Stefan Vogel ; Gutachter: Werner Hosemann, Ruth Lang-Roth ; Werner Hosemann, Bernhard Lehnert." Greifswald : Universität Greifswald, 2020. http://d-nb.info/1204200181/34.
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Selberg, Malin. "Självskadebeteende och Expressed Emotion. En uppföljning av IKB-Intensiv Kontextuell Behandling." Thesis, Linköpings universitet, Institutionen för klinisk och experimentell medicin, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-135350.
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Att avsiktligt skära, bränna eller på annat sätt skada sig själv illa är förenat med ett stort lidande och väcker ofta starka reaktioner hos de anhöriga. Problematiken är omfattande och självskadebeteende förefaller vara en stark prediktor för självmordsförsök och fullbordade självmord. Globalt är självmord den näst vanligaste dödsorsaken bland ungdomar. Efterfrågan på effektiva behandlingsmodeller för denna målgrupp är stor. I Sverige, närmare bestämt i Uppsala har behandlingsmodellen IKB – Intensiv Kontextuell Behandling utvecklats för ungdomar med självskadebeteende och/eller suicidala beteenden och deras familjer. Modellen är en integrerad individ- och familjeterapeutisk behandlingsmodell. Föreliggande studie syftade till att undersöka behandlingsmodellen IKB:s effektivitet i förhållande till minskat självskadebeteende hos ungdomarna och minskade nivåer av Expressed emotion hos föräldrarna. Sammanlagt har 34 familjer deltagit i studien och de har samtliga genomgått behandling inom ramen för IKB-modellen. Resultatet visade på en effektivitet i behandlingsmodellen IKB avseende att minska självskadebeteende hos ungdomarna samt att minska nivåerna av Expressed emotion hos föräldrarna. Utfallet av studien diskuteras utifrån tidigare forskning och metodologiska frågor.To intentionally cut, burn or hurt oneself severely is associated with great suffering and often arouse strong reactions within the family context. The problem is extensive and self-harm appears to be a strong predictor of suicide attempts and completed suicides. Globally, suicide is the second leading cause of death among young people. Effective treatment models for this group is urgent. In Sweden, (Uppsala) the model IKB - Intensive Contextual Treatment was developed for adolescents with self-harm and / or suicidal behavior, and their families in order to provide support. IKB is an integrated individual and family therapeutic model. The aim of the study were to evaluate the effectiveness of IKB in relation to frequency of self-harm and levels of Expressed emotion. A total of 34 families participated in the study and they all received treatment in the context of the IKB-model. The families completed the self-assessment forms for data collection before treatment, after treatment and follow-up. Results showed efficiency to reduce self-harm among adolescents and to decrease levels of Expressed emotion. The outcome of the study are discussed based on previous research and methodological issues.
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Ouedraogo, Ganda Stéphane. "Automatic synthesis of hardware accelerator from high-level specifications of physical layers for flexible radio." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S183/document.
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L'internet des objets vise à connecter des milliards d'objets physiques ainsi qu'à les rendre accessibles depuis le monde numérique que représente l'internet d'aujourd'hui. Pour ce faire, l'accès à ces objets sera majoritairement réalisé sans fil et sans utiliser d'infrastructures prédéfinies ou de normes spécifiques. Une telle technologie nécessite de définir et d'implémenter des nœuds radio intelligents capables de s'adapter à différents protocoles physiques de communication. Nos travaux de recherches ont consisté à définir un flot de conception pour ces nœuds intelligents partant de leur modélisation à haut niveau jusqu'à leur implémentation sur des cibles de types FPGA. Ce flot vise à améliorer la programmabilité des formes d'ondes par l'utilisation de spécification de haut niveau exécutables et synthétisables, il repose sur la synthèse de haut niveau (HLS pour High Level Synthesis) pour le prototypage rapide des briques de base ainsi que sur le modèle de calcul de types flot de données des formes d'ondes radio. Le point d'entrée du flot consiste en un langage à usage spécifique (DSL pour Domain Specific Language) qui permet de modéliser à haut niveau une forme d'onde tout en insérant des contraintes d'implémentation pour des architectures reconfigurables telles que les FPGA. Il est associé à un compilateur qui permet de générer du code synthétisable ainsi que des scripts de synthèse. La forme d'onde finale est composée d'un chemin de données et d'une entité de contrôle implémentée sous forme d'une machine d'état hiérarchiqueThe Internet of Things (IoT) aims at connecting billions of communicating devices through an internet-like network. To this aim, the access to these things is expected to be performed via wireless technologies without using any predefined infrastructures or standards. This technology requires defining and implementing smart nodes capable to adapt to different radio communication protocols. In this thesis, we have defined a design methodology/flow, for such smart nodes, starting from their high-level specification down to their implementation in FPGA fabrics. This flow aims at improving the programmability of the waveforms by leveraging some high-level specifications. Thus, it relies on the High-Level Synthesis (HLS) for rapid prototyping of the waveforms functional blocks as well as the dataflow model of computation. Its entry point is Domain-Specific Language which enables modeling a waveform while inserting some implementation constraints for reconfigurable architectures such as the FPGAs. The flow is featured with a compiler which purpose is to produce some synthesis scripts and generate some RTL source code. The final waveform consists of a datapath and a control unit implemented as a Hierarchical Finite State Machine (HFSM)