Rozprawy doktorskie: „SiC SBD”

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Kaufmann, Ivan Rodrigo. "Diodos schottky de SiC para uso como detectores de energia de partículas carregadas". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/171046.

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Neste trabalho foram investigadas estruturas de diodos Schottky de carbeto de silício (SiC) com potencial uso em detectores de energia de partículas carregadas. Para tanto, foram fabricados diodos Schottky de SiC do tipo Metal-Isolador-Semicondutor (MIS). Uma estrutura MIS é considerada uma vez que o SiC sempre forma em sua superfície uma fina camada de oxicarbeto de silício (SiCxOy) nativo, de difícil remoção por ataques químicos. Foi desenvolvido um modelo modificado da teoria de Emissão Termiônica (TE), de modo a levar em conta o óxido nativo e/ou finas camadas dielétricas inseridas entre metal e semicondutor nas estruturas de diodos Schottky. Foram fabricadas estruturas alumínio/dielétrico/silício para caracterização dos dielétricos utilizados. Foram depositados os dielétricos de SiO2, TiO2, HfO2 e Al2O3 entre o metal Ni e o semicondutor de SiC, variando as espessuras de 1 a 8 nm. As espessuras depositadas foram confirmadas por Elipsometria espectral e Reflectometria de raio X, anteriormente à deposição por sputtering do contato Schottky de Ni. Após a deposição e o tratamento térmico do Ni, as estruturas de diodos Schottky foram caracterizadas eletricamente por meio de medidas de Corrente-Tensão (I-V) e Capacitância-Tensão (C-V), variando a temperatura de medida. Foi observado que a presença de uma fina camada dielétrica entre metal e semicondutor aumenta artificialmente a Altura da Barreira Schottky (SBH), diminuindo a corrente reversa quando o diodo é polarizado reversamente. Por meio do modelo modificado da TE, foi calculada uma espessura variando de 0.18 – 0.20 nm para o oxicarbeto de silício presente nos diodos estudados. As SBH reais foram extraídas por meio das medidas de I-V, variando-se a temperatura. Foram obtidos os valores da SBH de 1.39, 1.32 e 1.26 V, para os dielétricos TiO2, Al2O3, HfO2 e com 1 nm de espessura nominal cada, respectivamente. Para esses, o fator de idealidade calculado ficou próximo de 1. Espessuras de dielétricos acima de 4 nm começam a apresentar características de capacitores Metal-Óxido-Semicondutor e não de diodos Schottky. Por fim, reportamos as estruturas de Ni/Al2O3/4H-SiC/Ni e Ni/HfO2/4H-SiC/Ni, com 1 nm de dielétrico depositado, para uso como detector de partículas alfa no experimento de Espectrometria de Retroespalhamento Rutherford (RBS). Ambos os detectores apresentaram corrente reversa menor que 70 nA.cm-2 e resolução em energia de 76 keV, para polarização reversa de 40 V.
In the present work, silicon carbide (SiC) Schottky diodes with potential use in energy particle detectors were investigated. Metal-Insulator-Semiconductor (MIS) SiC Schottky diodes were fabricated. The MIS structures are considered because SiC always forms a thin native silicon oxycarbide (SiCxOy) layer in its surface that is difficult to remove by chemical means. A modified Thermionic Emission theory (TE) was developed to take into account the native oxide and/or thin dielectric layers present between metal and semiconductor in Schottky diodes. Aluminum/dielectric/silicon structures were fabricated for the dielectric characterization. SiO2, TiO2, HfO2 and Al2O3 dielectrics were deposited between Ni and SiC, with thicknesses varying from 1 to 8 nm. The deposited dielectrics layers thicknesses were confirmed by Ellipsometry spectra and X ray reflectometry before deposition of Ni Schottky contacts by sputtering. After Ni deposition and annealing, the Schottky diodes were electrically characterized by Current-Voltage (I-V) and Capacitance-Voltage measurements, varying the temperature. A thin dielectric layer present between metal and semiconductor artificially augments the Schottky Barrier Height (SBH) and lowers the reverse current when the diodes are reverse biased. A 0.18 – 0.20 nm of SiCxOy layer was inferred for the diodes using the modified TE. The real SBH was extracted from the I-V measurements and presented values of 1.39, 1.32 and 1.26 V for the diodes with 1 nm of TiO2, Al2O3 and HfO2, respectively. For these, an ideality factor close to 1 was calculated. Diodes with thicker (>4 nm) dielectrics layers shows Metal-Oxide-Semiconductor capacitors behavior. Ni/Al2O3/4H-SiC/Ni and Ni/HfO2/4H-SiC/Ni structures with 1 nm of dielectric layer thickness were used in Rutherford Backscattering Spectrometry experiments. Both detectors presented reverse current lower than 70 nA.cm-2 and energy resolution of 76 keV, when applied 40 V reverse bias.

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Im, Hsung J. "Metal Contacts to Silicon Carbide and Gallium Nitride Studied with Ballistic Electron Emission Microscopy". The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1000844302.

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Martínez, Diego Jessie. "Sistema baseado em conhecimento (SBC) de apoio à capacitação organizacional". reponame:Repositório Institucional da UFSC, 2017. https://repositorio.ufsc.br/xmlui/handle/123456789/179922.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia e Gestão do Conhecimento, Florianópolis, 2017
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Evitar a perda da memória organizacional e a dependência de uma ou poucas pessoas é um desafio da Era do Conhecimento. Conhecimentos chave são aqueles vitais para o cumprimento da missão, permitem alcançar os objetivos estratégicos e estão alinhados com a construção da visão organizacional. Conhecimentos chave, independentes do nível (estratégico, tático ou operacional), criam vantagens competitivas de longo, médio e curto prazo. O objetivo desta pesquisa é propor um Sistema Baseado em Conhecimento (SBC) de apoio à capacitação organizacional. A aplicação foi realizada em uma instituição bancária. É utilizado um método que combina a metodologia de engenharia de ontologias e método incremental de desenvolvimento. Engenharia de ontologias é uma metodologia, da Engenharia do Conhecimento (EC), para o desenvolvimento ordenado e por etapas de SBC. O método incremental permite chegar de forma ágil no primeiro protótipo, para posteriormente, ir incorporando novas funcionalidades em ciclos curtos sucessivos. Como resultado deste trabalho, tem-se a proposta de um SBC, suportado por ontologia, para apoio ao aprendizado e ferramenta de consulta no domínio do curso Autorregulação Bancária - Conhecimentos Gerais. Adicionalmente, foram propostas métricas de avaliação do desempenho da Gestão do Conhecimento (GC) para este e outros cursos de capacitação semelhantes na organização. A aplicação do método permitiu concluir que a metodologia híbrida, aqui proposta, auxilia efetivamente o desenvolvimento de SBC de apoio à capacitação organizacional, pudendo ser replicável em outros cursos, e tendo como critérios fundamentais a agregação de valor, a escalabilidade e a interoperabilidade.
Abstract: A challenge of the Knowledge Age is avoiding loss of organizational memory and reducing dependence on few people's knowledge. Key knowledge is vital to mission fulfillment, drives the achievement of strategic objectives and is aligned with pursuing the organization's vision. Key knowledge, independent of the level (strategic, tactical or operational), creates long, medium or short term competitive advantages. The objective of this research is to propose a Knowledge Based System (KBS) to support organizational training. The research was applied at a financial institution. A method that combines ontology engineering methodology and incremental development method was used. Engineering of ontologies is a methodology, of Knowledge Engineering (KE), for the orderly and stepwise development of KBS. The incremental method allows arriving in an agile way in the first prototype, and then, incorporate new functionalities in successive short cycles. As a result of this work, there is a proposal of a KBS, based on ontology, to support learning and serving as query tool in the field of the course Banking Self-Regulation - General Knowledge. Additionally, metrics were proposed to measure the performance of Knowledge Management (KM) for this, and other similar training courses in the organization. Applying the method shows that the hybrid methodology proposed here effectively assists the development of SBC in support of organizational training, being able to be replicable in other courses, and having as fundamental criteria adding value, scalability and interoperability.

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Sahlberg, Bo. "Indoor Environment in Dwellings and Sick Building Syndrome (SBS) : Longitudinal Studies". Doctoral thesis, Uppsala universitet, Arbets- och miljömedicin, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-172769.

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People spend most of their time indoors and mostly in the dwelling. It is therefore important to investigate associations between indoor exposure in dwellings and health. Symptoms that may be related to the indoor environment are sometimes referred to as the "sick building syndrome" (SBS). SBS involves symptoms such as eye, skin and upper airway irritation, headache and fatigue. Three longitudinal studies and one prevalence study on personal and environmental risk factors for SBS in adults were performed. The prevalence study included measurements of indoor exposures in the dwellings. The longitudinal studies, with 8-10 years follow-up time, showed that smoking and indoor paint emissions were risk factors for SBS. Moreover, building dampness and moulds in dwellings were risk factors for onset (incidence) of general symptoms, skin symptoms and mucosal symptoms. In addition subjects living in damp dwellings have a lower remission of general symptoms and skin symptoms. Hay fever was a risk factor for onset of skin symptoms and mucosal symptoms, and asthma was a risk factor for onset of general and mucosal symptoms. Biomarkers of allergy and inflammation (bronchial reactivity, total IgE, ECP and eosinophil count) were predictors of onset of SBS symptoms, in particular mucosal symptoms. In the prevalence study, any SBS-symptom was associated with some individual volatile organic compounds of possible microbial origin (MVOC) e.g. 2-pentanol, 2-hexanon, 2-pentylfuran and 1-octen-3ol. Moreover, there were associations between indoor levels of formaldehyde and the plasticizer Texanol and any SBS. The result from the study indicates that individual MVOC are better indicators of SBS than the total value of MVOC. A final conclusion is that smoking, dampness and moulds and emissions from indoor painting may increase the onset of SBS. The indoor environment in dwellings over time has improved, but there is still a need for further improvements of the indoor environment in dwellings. More longitudinal SBS studies are needed.

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Haouche, Corinne. "Utilisation des concepts de l'acquisition des connaissances pour valider un SBC". Paris 9, 1995. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1995PA090016.

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Notre travail consiste à exploiter un modèle conceptuel « à la KADS » comme un ensemble de spécifications pour une validation au niveau connaissance des systèmes à base de connaissances. Nous proposons une méthode s'inspirant du test en boite blanche et utilisant des spécifications « à la KADS » et reconstruites en reverse-engineering. Cette méthode consiste à construire un chemin d'inférence courant (CIC), c'est-à-dire une abstraction au niveau des connaissances d'une trace de niveau code. Ce CIC est ensuite comparé à l'ensemble des chemins d'inférences valides (CIV) dérivé de la structure d'inférence de notre modèle conceptuel. Lorsque le CIC appartient à CIV, la procédure de test est itérée sur d'autres données de test ; sinon l'expert intervient pour indiquer si ce CIC est un chemin d'inférence valide, auquel cas CIV et la structure d'inférence sont mis à jour, ou s'il est invalide, auquel cas le code doit être corrigé. Cette méthode permet ainsi de faire évoluer le SBC et son modèle conceptuel pour que la tache assignée au SBC soit effectivement réalisée. Cette méthode a été utilisée pour valider un prototype, le système AMD, dont nous avons reconstruit un modèle conceptuel en reverse-engineering. Cela nous a permis de détecter certaines erreurs au niveau d'AMD et de mettre au jour le fait qu'un modèle conceptuel « à la KADS » doit être exprimé en terme de connaissances du domaine pour être exploitable dans une phase de validation
This work deals with the validation of Knowledge-Based Systems. Knowledge acquisition, and especially the conceptual modelling of knowledge provides conceptual models which can be considered as high-level specifications of the KBS. This work is a proposal for a testing method, close to white box testing, but which uses a KADS conceptual model built in reverse-engineering, as a set of specifications. When the system is run, a high-level trace called a current inference path (CIP) is built. Then it is compared to the inference structure. If this CIP does not match the inference structure, either the KBS or the conceptual model is updated. Thus, the specifications and the KBS can evolve concurrently to achieve the actual task assigned to the system. This method has been used to build a conceptual model. The results of this method are twofold. On the one hand some runtime errors were detected; on the other hand, it has lead us to conclude that a KADS conceptual model must be expressed using the domain knowledge in order to be exploitable in a validation process

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Sidiropoulou, Christina. "VoIP Operators : From a Carrier Point of View". Thesis, KTH, Kommunikationssystem, CoS, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91048.

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Voice over Internet Protocol (VoIP) is a service that has recently gained a lot of attention from the telecommunications (telecom) world since both Internet service providers (ISPs) and telecommunications operators have realized the important advantages that it can offer. Although traditional telephony is well established both in the telecom world and in our daily lives, VoIP is now competing with it by offering cost savings, simplicity, and introducing new ways of communicating. Internet service providers have already started deploying efficient VoIP services for their customers and carriers are transforming their network infrastructures in order to be able to accommodate the requirements of VoIP traffic. There are a lot of essential factors that both providers and carriers have to take into consideration in order to efficiently build and operate VoIP technologies. Proper service planning and well-established monitoring and troubleshooting procedures are vital for successful VoIP service. This thesis focuses on commercial VoIP implementation at the carrier’s side and investigates how a carrier can efficiently maintain and troubleshoot their VoIP infrastructure so as to comply with the Service Level Agreements (SLAs) they have signed with their customers (ISP providers), as well as analyses proactive actions that can betaken for minimizing the resources required for customer support. As an outcome, this thesis presents efficient ways of network planning and monitoring, as well as it provides conclusions regarding what are the efficient methods for troubleshooting the carrier’s VoIP products inboth technical and organizational level.
Röst över Internet Protokoll (VoIP) är en tjänst som nyligen har fått ökad uppmärksamhet inom telekommunikations (telecom) branschen eftersom att både Internetleverantörer (ISPs) och telecom operatörer har insett vilka fördelar som tjänsten erbjuder. Även om traditionell telefoni är väl etablerad i både telecombranschen och vår vardag, så kan VoIP konkurrera genom att erbjuda kostnadsbesparingar, förenkling, och introducera nya sätt att kommunicera på. IP leverantörer har redan påbörjat lansering av effektiva VoIP tjänster till sina kunder och telecom carriers bygger om sin nätverksstruktur för att möta kraven av VoIP traffik. Det finns många faktorer att bejaka för både IP leverantörer och telecom carriers för att effektivt bygga och driva VoIP nätverk. Noggrann produktplanering och väletablerad övervakning samt felsökningsprocedurer är en vital del i en framgångsrik VoIP tjänst. Denna avhandling fokuserar på VoIP implementering hos en telecom carrier och hur en telecom carrier effektivt kan underhålla och felsöka VoIP infrastruktur för att möta de servicenivåavtal de har skrivit med sina kunder (IP leverantörer), samt analysera det förebyggande åtgärder som kan tas för att minimera de resurser som behövs till kundtjänst. Denna avhandling presenteras effektiva tillvägagångssätt för planering och övervakning samt erbjuder effektiva,teknisk och organisationella metoder för felsökning av en telecom carriers VoIP produkter.

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Schellenberg, Ingra. "Depression as disease, exploring the slippery slope between feeling sad and being sick". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ52947.pdf.

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Pires, João Batista. "Governança, políticas públicas de cultura e as realidades locais: o caso VAI-SBC". Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/100/100135/tde-20072017-091753/.

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Trata-se do processo de disseminação ou difusão de políticas públicas de cultura, a partir da análise de implantação do Programa de Valorização de Iniciativas Culturais, VAI-SBC, programa de fomento à produção cultural da prefeitura de São Bernardo do Campo, em relação com o programa homônimo e sua matriz conceitual, o Programa VAI, desenvolvido na cidade de São Paulo. Embora ambos se filiem ao mesmo campo político-ideológico, ao ser adaptado à localidade do Grande ABC, variáveis internas e externas ao programa, tais como a experiência acumulada pelos fazedores de política (policy makers), os constrangimentos impostos pela situação político-administrativa do município e as características de desenvolvimento especificas do campo cultural local influenciaram o modo como ocorreu a escolha do modelo de formulação, agindo decisivamente na construção do seu objeto e de suas diretrizes. O estudo foi realizado a partir de pesquisa de documentos, leis, imprensa comercial e oficial, programas, entrevistas, depoimentos, projetos e ações, considerando aspectos políticos, culturais, artísticos e sociais na realização da política pública de cultura
It is about the process of dissemination or diffusion of culture public policies, from the analysis of the Cultural Initiatives Valuation Program, VAI-SBC, development program to cultural production of the São Bernardo do Campos city hall, in relation to the homonym program and its conceptual basis, the VAI Program, developed on the city of São Paulo. Although both join the same political-ideological field, when being adapted to the location of Grande ABC, internal and external variables to the program, such as the accumulated experience by the policy makers, the embarrassments imposed by the political-management situation of the city hall and the development characteristics of the local cultural field, influenced the way how the choice of the formulation model occurred, acting decisively on the construction of its object and its guidelines. The study was based on research on documents, laws, commercial and official press, programs, interviews, testimonies, projects and actions, considering politcal, cultural, artistic and social aspects in the accomplishment of the public policy of culture

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Zvolánek, Jiří. "Návrh RNAV SID a STAR tratí pro letiště Brno Tuřany". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229209.

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The main content of this master’s thesis is design of RNAV SID and STAR routes for Brno Tuřany Airport. The study analyses usage of current conventional instrument arrivals and departures published for the aerodrome and describes its TMA. The new precision RNAV routes and the terminal area are designed based on the indentified information. A detailed construction of the chosen departure procedure is enclosed.

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Khoukhi, Faddoul. "Approche logico-symbolique dans le traitement des connaissances incertaines et imprecises dans les sbc". Reims, 1996. http://www.theses.fr/1996REIMS014.

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L'un des problemes les plus importants en informatique, et plus particulierement en intelligence artificielle, depuis l'apparition de l'ordinateur, est la simulation du processus d'automatisation du raisonnement humain, notamment dans les systemes a base de connaissances. Le raisonnement dans les systemes a base de connaissances est multiforme. En effet, les qualificatifs associes generalement au mot raisonnement correspondent soit a la nature du raisonnement (raisonnement hypothetique, analogique, etc. ), soit a la nature des connaissances capables de realiser des fonctions de raisonnement. Ainsi, la modelisation du raisonnement constitue, a l'heure actuelle une part importante des recherches et des developpements en intelligence artificielle. De tels systemes necessitent en particulier une representation adequate, des connaissances mises en jeu et des mecanismes efficaces d'exploitation de ces connaissances (raisonnement). Les deux aspects, de representation des connaissances et du traitement, sont etroitement lies. Le raisonnement humain s'appuie frequemment sur des connaissances et des donnees peu exactes, incertaines ou encore dont l'expression verbale est elle-meme entachee d'imprecision. Modeliser ce type de connaissances et automatiser le raisonnement capable de le prendre en compte est une activite importante en intelligence artificielle et implique, de ce fait, l'elaboration d'un formalisme permettant de representer les connaissances, et d'une methode permettant de les manipuler. De nombreux formalismes de representation des connaissances resultent des travaux effectues en logique mathematique, en theorie des graphes, en psychologie cognitive et en informatique. Dans cette these, nous proposons une approche logico-symbolique pour le traitement des connaissances imprecises et/ou incertaines dans les systemes a base de connaissances basee essentiellement sur la logique des propositions multivalentes et la theorie des probabilites symboliques

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Martínez, Aranda Nicole Andrea. "Rediseño de procesos del programa de justicia juvenil: "Servicio beneficio a la comunidad (SBC)"". Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/168587.

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Memoria para optar al título de Ingeniera Civil Industrial
Bajo el área de Justicia Juvenil del Servicio Nacional de Menores (SENAME)se encuentra el programa Servicio en Beneficio a la Comunidad (SBC), único programa con enfoque comunitario en el país, al cual ingresan jóvenes entre 14 y 18 años que han sido derivados desde Tribunales de Garantía (SENAME, 2018), siendo sancionados por la Ley de Responsabilidad Adolescente para cumplir la modalidad medio libre (MINISTERIO DE JUSTICIA, 2005). La ejecución está en manos de Organismos Colaboradores, los cuales pertenecen a una red que, a nivel nacional (SENAME, 2018), se articula en colaboración con SENAME para desplegar la oferta programática tanto de Protección de Derechos como de Justicia Juvenil, tal como lo establece la ley (MINISTERIO DE JUSTICIA, 2005). Uno de los Organismos Colaboradores que ejecuta el programa SBC es Corporación Opción. Bajo este marco institucional se ampara el programa SBC Reparatorias Sur perteneciente a la oferta de Corporación Opción, el cual atiende hoy al 55% de la población total de SBC a nivel nacional (Corporación Opción, 2016), abarcando ocho comunas del Sur de Santiago. El objetivo general de este trabajo es elaborar una propuesta de rediseño de procesos del programa SBC de tal manera que se fortalezca el enfoque comunitario, resaltándolo por sobre los enfoques tradicionales que mantienen hoy al sistema de justicia juvenil bajo una lógica puramente tutelar (Tiffer, 2010), considerando la complejidad del aparato estatal y el vínculo con el sector privado bajo el cual se enmarca. La metodología de este estudio es de enfoque cualitativo, de corte exploratorio-descriptivo, para cual se realizó un análisis documental de más de 30 artículos en complemento con la realización de entrevistas semiestructuradas a 9 actores principales en el desarrollo del programa, abarcando el 100% de las funciones administrativas involucradas. Así, se construyó la operacionalización de la información de tal manera que resultara posible plasmarla en una propuesta de rediseño de procesos (Barros, 2000). Los resultados muestran falencias de origen sistémico que impactan en la ejecución del programa mostrando contradicciones relevantes enmarcadas en una definición de prioridades equívocas que propone como objetivo central la reinserción social de los y las jóvenes mediante una atención basada en un modelo socioeducativo y de potenciamiento comunitario, pero que en la práctica sólo tienen por resultado una secuencia de métodos asociados al modelo sin lograr una metodología continua y robusta. Es así como se propone una serie de reformulaciones al proceso actual del programa SBC, basado en la evidencia del caso de SBC reparatorias Sur, las cuales deben ir acompañadas de soluciones organizacionales y de gestión documental.
FONDECYT N° 11160330 "Cambio en las políticas hacia la infancia y adolescencia en Chile. Análisis de los marcos interpretativos de instituciones y actores relacionados"

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Al-Azri, Maya. "Structural and magnetic properties of Mn implanted 6H-SiC". Paris 13, 2013. http://scbd-sto.univ-paris13.fr/secure/edgalilee_th_2013_al_azri.pdf.

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In this study, n-Type 6H-SiC(0001) substrates were implanted with three fluencies of Mn' 5x10¹⁵ Mn/cm² (Mn content : 0. 7%), 1x10¹⁶ (~2 %), and 5x10¹⁶ cm² (7%) with implantation energy of 80 keV and substrate temperature of 365°C. The samples were characterized using Rutherford Backscattering and Channeling Spectroscopy (RBS/C), High Resolution X-Ray Diffraction technique (HRXRD), micro Raman Spectroscopy (μRS) and Superconducting Quantum Interference Device (SQUID) techniques. The aims were to investigate implantation-induced defects upon dose and to study any correlation between disorder-composition and magnetic properties. RBS/C spectra were fitted using McChasy code, and the corresponding results show that 41% of Mn occupy substitutional sites for the lowest dose, 63% for intermediate Mn content, whereas an almost amorphization occurred for the highest dose. The hysteresis loops of the all samples have typical ferromagnetic shapes. The maximum magnetic moments were obtained for the fluence of 1×10¹⁶ Mn/cm² at which the ratio of Mn at substitutional site was maximum. In addition, we investigated the structural and magnetic properties of Mn-doped 6H-SiC using ab-initio calculations. Various configurations of Mn sites and vacancy types were considered. The calculations showed that a substitutional Mn atom at Si site possesses larger magnetic moment than Mn atom at C site. A model is introduced to explain the dependence of the magnetic structure on site occupation. The magnetic properties of ferromagnetically (FM) and antiferromagnetically (AFM) coupled pair of Mn atoms with and without neighboring vacancies have also been explored
Dans cette étude, des substrats 6H-SiC (0001) de type-n ont été implantés avec trois concentrations de Mn' : 5 x 10¹⁵ Mn/cm² (teneur en Mn : 0,7%), 1 x 10¹⁶ (~ 2%), et 5 x 10¹⁶ cm² (7 %) à une énergie d'implantation de 80 keV et pour une température de substrat de 365° C. Les échantillons ont été caractérisés par spectroscopie de rétrodiffusion de Rutherford, diffraction des rayons-X à haute résolution, spectroscopie micro-Raman et magnétométrie SQUID. L’objectif est d’étudier l’effet des défauts induits par l'implantation et de déduire une corrélation avec les propriétés magnétiques. Les résultats obtenus à partir des résultats de RBS/C montrent que 41% des Mn occupent les sites de substitution pour la plus faible concentration, 63% pour la concentration intermédiaire, alors qu’une structure amorphe apparaît pour la dose la plus élevée. Les cycles d'hystérésis présentent des formes typiques d’une réponse ferromagnétique. Le moment magnétique maximal a été obtenu pour la concentration 1×10¹⁶ Mn/cm² à laquelle le taux de Mn en site de substitution est maximal. Les résultats expérimentaux ont été confrontés aux résultats des calculs ab initio. Différentes configurations de sites Mn et types d'occupation ont été pris en compte. Les calculs ont montré qu'un atome de Mn substitué sur le site d’un atome de Si possède un moment magnétique supérieur à celui d’un atome Mn sur un site C. Un modèle est introduit pour expliquer la dépendance de la structure magnétique au type d'occupation des sites. Les propriétés magnétiques de paires d’atomes Mn couplés, type ferromagnétique (FM) et antiferromagnétique (AFM), avec et sans sites voisins vacants, ont également été explorées

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Bengtsson, Niklas, Lidia Berhane i Markus Petri. "Integrationsplattformar : Finns det säkerhetsrisker med användandet av integrationsplattformar". Thesis, Jönköping University, JIBS, Business Informatics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-776.

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Sammanfattning

I dagens samhälle ställs det stora krav på att ett företags IT-system skall vara tillgängligt för kommunikation. Kommunikationen kan ske inom och mellan företag. Då dessa kommunicerande aktörer kan ha olika system och arkitekturer som gör det komplicerat att kommunicera med varandra, krävs även någon applikation som hanterar detta problem. Dessa applikationer går under namnet integrationsplattformar. Då dessa plattformar fungerar som ett centralt nav i kommunikationen är det viktigt att säkerheten i dessa är av hög nivå.

Problemet är, vilka säkerhetsrisker kan tänkas dyka upp vid användandet av integrationsplattformar i ett informationssystem? Denna fråga ledde oss in på två forskningsfrågor som presenteras nedan:

• Kan denna teknik för applikationsintegration få konsekvenser för säkerheten och i så fall på vilket sätt?

• Hur ser den bakomliggande tekniken för säkerhet ut hos två viktiga integrationsplattformar på marknaden, är dessa likvärdiga så att de säkerhetsrisker som identifieras är giltiga för integrationsplattformar generellt?

Vi började med att definiera termen säkerhet utifrån tidigare kursböcker. När detta var klart kunde vi identifiera potentiella problem som företag kunde ställas inför vid implementation av integrationsplattformar. Därefter använde vi oss av Internet och olika typer av databaser och tidskrifter för att lokalisera fakta och information som behandlar integrationsplattformar för att få en bredare förståelse för hur dessa fungerar. Vi bestämde oss för att använda primärdata vid empiriinsamlingen och valde därför att genomföra intervjuer med leverantörer, tillverkare och kunder av integrationsplattformar för att kunna få olika perspektiv från hela kedjan.

En analys har gjorts av teorin och resultat av intervjun. Analysen ger ett svar på våra två forskningsfrågor utifrån våra emperiska resultat. Vi har dragit slutsatsen att det finns säkerhetsrisker med användandet av integrationsplattformar vid applikationsintegration. De säkerhetsrisker som kan dyka upp vid användandet av integrationsplattformar i ett IS är ett flertal och väldigt beroende av hur integrationsplattformens miljö är sammansatt. Vid införandet av en ny teknik finns det risk att man ärver säkerhetsproblem från den föregående tekniken.

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Sudireddy, Samara Simha Reddy. "Accmulator [sic] based test set embedding /". Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1879994321&sid=8&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Yeo, Cheow Fatt. "Addition of built-in self-testing capability to the Intel SBC 80/10A single board computer". Thesis, Kansas State University, 1986. http://hdl.handle.net/2097/14155.

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Španihel, Pavol. "Zabezpečovací modul pro reklamní robot FEKT VUT v Brně". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219649.

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The aim of this work is to design a safety module for promotional robot FEEC BUT robot, which is based on evaluation kit RDK-IDM-SBC. The security module allows authorized persons control different parts of the robot (monitors, computers and subsystems included in the robot).

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Engvall, Karin. "A Sociological Approach to Indoor Environment in Dwellings : Risk factors for Sick Building Syndrome (SBS) and Discomfort". Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3506.

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Naguib, Mina. "On the security of VoIP mobile network operator and international carrier interconnects". Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199056.

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All Mobile Network Operators (MNOs) as well as international carriers are moving voice services from the legacy Public Switched Telephone Network (PSTN) to Voice over IP (VoIP). The benefit is that VoIP traffic can be easily rerouted at any moment, thus giving companies a variety of options as traffic can be rerouted to any carrier of choice leading to different Quality of Service (QoS) levels (and thus agreements) as well as different prices to choose from. With a fierce competition for the telecom companies involved in the voice traffic hubbing business, this new landscape offers not only opportunities but also opens the system to vulnerabilities. The stakes are actually quite high: If harm can be done to one of these international carriers, other companies will route away their traffic. The result will be significant financial damages for the company as well as a serious harm to its reputation. The aim of this paper is to raise awareness that internationalcarriers and in particular their VoIP traffic can be exposed to debilitating attacks to harm these systems that are critical for our everyday life. The experimentation in this project demonstrates with a hands-on example how a major carrier can be hacked and rendered useless. In particular, we craft a framework for testing the security of interconnects between MNOs and international carriers. The central point of the paper will be to demonstrate how easy it can be to attack major carriers in the market: using common open source tools without having any information in advance. Moreover, the goal is to understand how the market functions, how interconnects between companies are built, where the weaknesses are, and which solutions can thwart those threats and secure these systems.

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Krueger, Eric A. "Rejection sensitivity in dysphoric college students accountng [sic] for daily changes in dysphoric and anxious symptoms, hostility, and reasurrance [sic] seeking /". Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1654497821&sid=3&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Coburn, Michael S. "Caught between a risk and a hard place making senese [sic] of a chronic technilogical [sic] disaster in Rock Springs, Wyoming /". Laramie, Wyo. : University of Wyoming, 2009. http://proquest.umi.com/pqdweb?did=1962984731&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Wang, Chengju. "Energy use and energy saving in buildings and asthma, allergy and sick building syndrome (SBS): a literature review". Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30086.

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Energy use in buildings is an important contribution to global CO2 emissions and contributes to global warming. In recent years, there has been concern about creating energy efficiency buildings, green buildings and healthy buildings but this development needs guidance by multidisciplinary scientists and experts. Since energy saving can influence the indoor environment in different ways, epidemiological research is needed in different climate zones to evaluate the health consequences of making the buildings more energy efficient. Epidemiological studies and modelling studies are available on health effects and indoor effects of energy conversation, improved thermal insulation, increased air tightness and creating green buildings. The health-related literature on this issue was reviewed, by searching scientific articles in the medical Database PubMed and in the general database Web of Science as well as Nature database. In this literature review, 53 relevant peer reviewed articles on health effects of energy use and energy saving were found. Most of the studies had investigated residential buildings. One main conclusion from the review is that combined energy efficiency improvements in buildings can be associated with improvement of general health, such as less asthma, allergies, sick building syndrome (SBS) symptoms, respiratory symptoms, and reduced cold-related and heat-related mortality. Moreover, combined energy efficiency improvements can improve indoor air quality, increase productivity and satisfaction and reduce work leave and school absence. Effective heating of buildings can reduce respiratory symptoms and reduce work leave and school absence. However, some potential health problems can occur if increased energy efficiency will reduce ventilation flow. Energy saving by increasing air tightness or reducing ventilation is associated with impaired indoor air quality and negative health effects. In contrast, improved ventilation may reduce SBS, respiratory symptoms and increase indoor air quality. Installation of mechanical ventilation can solve the negative effects of making the building construction in dwellings more air tight. In future research, more studies are needed on health impacts of single energy efficiency improvement methods. Existing studies have mostly used a combination of improvement methods. In addition, modelling software programs should more often be used, since they can take into account effects of different energy efficiency improvement methods on indoor air quality in different types of buildings and in different climates.

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Regan, Collin Farnum. "Progess [sic] toward the total synthesis of brasilicardin A". Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1905691771&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Dufek, Ladislav. "Ovládání elektronických systémů přes webové rozhraní". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219174.

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This master thesis goes into problematics of design of an electronic device control system and its realization. First of all its overall conception is specified and potential hardware platforms are analyzed afterwards. Based on this analysis the system’s final conception is drawn up, the device’s circuit layout is created and finally a functional prototype is manufactured. The later part of this thesis describes the software accessories and tools. The principles of a chosen operating system, management application and webbased interface are described along with the problems of authentization to solve. The proposed solutions for the authentization-specific tasks gave rise to the final implementation of the authentization methods and techniques.

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Nolte, Scott Allen. "Characterizing the response of gdhA transformed tobacco to glufsoinate [sic] /". Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1967963261&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Dhainaut, Guillaume. "A reverse proxy for VoIP : Or how to improve security in a ToIP network". Thesis, KTH, Kommunikationsnät, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183034.

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The need for security is crucial in Telephony over IP (ToIP). Secure protocols have been designed as well as specific devices to fulfill that need. This master thesis examines one of such devices called Session Border Controller (SBC), which can be compared to reverse proxies for ToIP. The idea is to apply message filters to increase security. This thesis presents the reasons of SBC existence, based on the security weaknesse sa ToIP network can show. These reasons are then used to establish a list of features which can be expected from a SBC and discuss its ideal placement in a ToIP network architecture. A test methodology for SBCs is established and used on the free software Kamailio as an illustration. Following this test, improvements of this software, regarding threats prevention and attacks detection, are presented and implemented.
Behovet av säkerhet är av avgörande betydelse i telefoni över IP (ToIP). Säkerhetsprotokoll har utformats samt särskilda enheter för att uppfylla detta behov. Detta examensarbete undersöker en av sådana enheter som kallas Session Border Controller (SBC), vilket kan jämföras med omvända proxyservrar för ToIP. Tanken är att tillämpa meddelandefilter för att öka säkerheten. Denna avhandling presenterar orsakerna till SBC existens, baserat på de säkerhets svagheter en ToIP nätverk kan visa. Dessa skäl används sedan för att upprätta en förteckning över egenskaper som kan förväntas av en SBC och diskutera dess ideal placering i en ToIP nätverksarkitektur . En testmetodik för SBC är etablerad och används på fri programvara Kamailio som en illustration. Efter detta test, förbättringar av denna programvara, om hot förebyggande och attacker upptäcka, presenteras och genomförs.

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26

Zhang, Teng. "Caractérisations des défauts profonds du SiC et pour l'optimisation des performances des composants haute tension". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI108/document.

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En raison de l'attrait croissant pour les applications haute tension, haute tempé-rature et haute fréquence, le carbure de silicium (SiC) continue d'attirer l'attention du monde entier comme l'un des candidats les plus compétitifs pour remplacer le sili-cium dans le champ électrique de puissance. Entre-temps, il est important de carac-tériser les défauts des semi-conducteurs et d'évaluer leur influence sur les dispositifs de puissance puisqu'ils sont directement liés à la durée de vie du véhicule porteur. De plus, la fiabilité, qui est également affectée par les défauts, devient une question incontournable dans le domaine de l'électricité de puissance.Les défauts, y compris les défauts ponctuels et les défauts prolongés, peuvent introduire des niveaux d'énergie supplémentaires dans la bande passante du SiC en raison de divers métaux comme le Ti, le Fe ou le réseau imparfait lui-même. En tant que méthode de caractérisation des défauts largement utilisée, la spectroscopie à transitoires en profondeur (DLTS) est supérieure pour déterminer l'énergie d'activa-tion Ea , la section efficace de capture Sigma et la concentration des défauts Nt ainsi que le profil des défauts dans la région d'épuisement grâce à ses divers modes de test et son analyse numérique avancée. La détermination de la hauteur de la barrière Schottky (HBS) prête à confusion depuis longtemps. Outre les mesures expérimentales selon les caractéristiques I-V ou C-V, différents modèles ont été proposés, de la distribution gaussienne du HBS au modèle de fluctuation potentielle. Il s'est avéré que ces modèles sont reliés à l'aide d'une hauteur de barrière à bande plate Phi_BF . Le tracé de Richardson basé sur Phi_BF ainsi que le modèle de fluctuation potentielle deviennent un outil puissant pour la caractérisation HBS. Les HBSs avec différents contacts métalliques ont été caractéri-sés, et les diodes à barrières multiples sont vérifiées par différents modèles. Les défauts des électrons dans le SiC ont été étudiés avec des diodes Schottky et PiN, tandis que les défauts des trous ont été étudiés dans des conditions d'injec-tion forte sur des diodes PiN. 9 niveaux d'électrons et 4 niveaux de trous sont com-munément trouvés dans SiC-4H. Une relation linéaire entre le Ea extrait et le log(sigma) indique l'existence de la température intrinsèque de chaque défaut. Cependant, au-cune différence évidente n'a été constatée en ce qui concerne l'inhomogénéité de la barrière à l'oxyde d'éther ou le métal de contact. De plus, les pièges à électrons près de la surface et les charges positives fixes dans la couche d'oxyde ont été étudiés sur des MOSFET de puissance SiC par polarisation de porte à haute température (HTGB) et dose ionisante totale (TID) provoquées par irradiation. Un modèle HTGB-assist-TID a été établi afin d'ex-plain l'effet de synergie
Due to the increasing appeal to the high voltage, high temperature and high fre-quency applications, Silicon Carbide (SiC) is continuing attracting world’s attention as one of the most competitive candidate for replacing silicon in power electric field. Meanwhile, it is important to characterize the defects in semiconductors and to in-vestigate their influences on power devices since they are directly linked to the car-rier lifetime. Moreover, reliability that is also affected by defects becomes an una-voidable issue now in power electrics. Defects, including point defects and extended defects, can introduce additional energy levels in the bandgap of SiC due to various metallic impurities such as Ti, Fe or intrinsic defects (vacancies, interstitial…) of the cristalline lattice itself. As one of the widely used defect characterization method, Deep Level Transient Spectroscopy (DLTS) is superior in determining the activation energy Ea , capture cross section sigma and defect concentration Nt as well as the defect profile in the depletion region thanks to its diverse testing modes and advanced numerical analysis. Determination of Schottky Barrier Height (SBH) has been confusing for long time. Apart from experimental measurement according to I-V or C-V characteristics, various models from Gaussian distribution of SBH to potential fluctuation model have been put forward. Now it was found that these models are connected with the help of flat-band barrier height Phi_BF . The Richardson plot based on Phi_BF along with the potential fluctuation model becomes a powerful tool for SBH characterization. SBHs with different metal contacts were characterized, and the diodes with multi-barrier are verified by different models. Electron traps in SiC were studied in Schottky and PiN diodes, while hole traps were investigated under strong injection conditions in PiN diodes. 9 electron traps and 4 hole traps have been found in our samples of 4H-SiC. A linear relationship between the extracted Ea and log(sigma) indicates the existence of the intrinsic temper-ature of each defects. However, no obvious difference has been found related to ei-ther barrier inhomogeneity or contact metal. Furthermore, the electron traps near in-terface and fixed positive charges in the oxide layer were investigated on SiC power MOSFETs by High Temperature Gate Bias (HTGB) and Total Ionizing Dose (TID) caused by irradiation. An HTGB-assist-TID model was established in order to ex-plain the synergetic effect

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Sturgis, Daniel J. "Meltwater infilltration [sic] in the accumulation zone, West Greenland Ice Sheet". Laramie, Wyo. : University of Wyoming, 2009. http://proquest.umi.com/pqdweb?did=1939351861&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Ramalingam, Santhosh. "Empirical evaluvation [sic] of range query size estimation through polynomial approximation /". Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1400971271&sid=7&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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McConaha, Melinda. "Conceptus effects on endometiral [sic] gene expression during implantation in mice /". Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1885607681&sid=2&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Abrahamsson, Alexandra. "Arbetsmiljöarbetet på SverigesBostadsrättsCentrum : Vad ändringarna i arbetsmiljölagen innebär". Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-9664.

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This diploma work was performed because the company Sveriges BostadsrättsCentrum, with the abbreviation SBC, had a need to gain insight into how changes in the Work Environment Act and related regulations which took effect January 1, 2009 affecting their work with the work environment. The changes mean that the client may hand over his work environment responsibilities to a contractor and that he has to select so-called building work environment co-ordinators. At SBC they are working as representatives for tenant-owner's association when a construction is about to be carried out. The purpose was to ascertain how changes may affect the work at SBC. The diploma work intends to educate the staff at SBC how work with the work environment would look like if they met the regulatory requirements. The main issue that the diploma work deals with is whether SBC has the responsibility to select a building work environment co-ordinator for the planning and projecting before the contractor takes over responsibility for the work environment. Questions were answered by information from the Work Environment Act, AFS 1999:3 and other material from the Work Environment Authority. Two interviews with staff at the Work Environment Authority were also held. One of the conclusions drawn from the diploma work is that it’s the client who will select a building work environment co-ordinator for the planning and projecting. That should be done as soon as the planning and projecting has begun. The planning and projecting usually begins before the main contractor takes over responsibility for the work environment as the employee. It is not clear that SBC will take on the client’s responsibility to select a building work environment co-ordinator for the planning and projecting in the early planning, before the contractor takes on responsibility and there are several ways to do this.

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Roy, Tristan Cyrus. "Global analysis of the defocusing [sic] cubic wave equation in dimension 3". Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1693174281&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Teiseh, Eliasu Azinyui. "Anaerobic hydrogen production by photosynthetic purplenonsulfur [sic] bacteria using volatile fatty acids". Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1594490411&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Underwood, Keith R. "Maternal nutritional management, AMP-activitated [sic] protein kinase and beef quality characteristics". Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1799977131&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Nauen, Bernd. "Leistungserschwerung und Zweckvereitelung im Schuldverhältnis : zur Funktion und Gestalt der Lehre von der Geschäftsgrundlage im BGB und im System des Reformentwurfs der Schuldrechtskommission /". Berlin : Duncker & Humblot, 2001. http://www.gbv.de/dms/spk/sbb/recht/toc/333325583.pdf.

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Quass, Guido. "Die Nutzungsstörung : zur Problematik der Störung des Verwendungszwecks und des Wegfalls der Geschäftsgrundlage /". Berlin : Duncker & Humblot, 2003. http://www.gbv.de/dms/spk/sbb/recht/toc/371120888.pdf.

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Taylor, Edwin Arthur. "Engendering peace : masculinity, femininity, and the Good Friday negotiations in Northern Irealand [sic] /". view abstract or download file of text, 2006. http://proquest.umi.com/pqdweb?did=1296094851&sid=1&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2006.
Typescript. Includes vita and abstract. "Research for this dissertation took place from September 2003 to September 2005, and included two field research visits to Northern Ireland during September 3-17, 2003 and April 5-June 8, 2005"--P. 3. Includes bibliographical references (leaves 186-199). Also available for download via the World Wide Web; free to University of Oregon users.

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Guertin, Steven Michael. "Mid-rapidity [pi]⁰ production in d+Au collions [sic] at [formula] = 200 GeV". Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1679830621&sid=10&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Yan, Xu. "Maternal obesity, inflammation and insulin resistance in skeleal [sic] muscle of fetal sheep". Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1798966771&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Yu, Han Savage Gerald J. "Teach workplace writing with authentic asssessment [sic] in introductory technical writing classrooms". Normal, Ill. : Illinois State University, 2007. http://proquest.umi.com/pqdweb?index=0&did=1417816171&SrchMode=1&sid=17&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1207668931&clientId=43838.

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Thesis (Ph. D.)--Illinois State University, 2007.
Title from title page screen, viewed on April 8, 2008. Dissertation Committee: Gerald Savage (chair), Ronald Fortune, Ronald Strickland. Includes bibliographical references (leaves 180-189) and abstract. Also available in print.

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Mera, Sánchez Marcos Irving, i del Aguila Lloyd Ramírez. "Sistema basado en conocimiento (SBC) para la evaluación del nivel de aprendizaje e inteligencia en niños de 5 años de edad usando la metodología CommonKADS". Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2016. https://hdl.handle.net/20.500.12672/5984.

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Diseña un sistema basado en el conocimiento utilizando la metodología CommonKADS que permite administrar el proceso de la Gestión del Aprendizaje para el logro de los objetivos de las instituciones educativas, a fin de evaluar el nivel de aprendizaje e inteligencia alcanzado por los niños de 5 años de edad del nivel inicial y realiza el control y seguimiento del proceso evaluativo mediante la clasificación e interpretación de acuerdo al puntaje alcanzado, de esta manera mejora los tiempos de procesamiento y obtención de resultados que permita identificar las capacidades a ser reforzados y visualizar los logros alcanzados.
Tesis

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Adeyemo, Adesola O. "Assesing [sic] environmental protection and management systems in West Africa : a case study of Nigeria /". Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1594501441&sid=2&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Mu, Yuan. "Chinese bank's credit risk assessment". Thesis, University of Stirling, 2007. http://hdl.handle.net/1893/210.

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This thesis studies the Chinese banks’ credit risk assessment using the Post Keynesian approach. We argue that bank loans are the major financial sources in emerging economies and it is uncertainty, an unquantifiable risk, rather than asymmetric information about quantifiable risk, as held by the mainstream approach, which is most important for the risk attached to credit loans, and this uncertainty is particularly important in China. With the universal existence of uncertainty, borrowers and lenders have to make decisions based on convention and experience. With regard to the nature of decision-making, this implies the importance of qualitative methods rather than quantitative methods. The current striking problem in Chinese banking is the large amount of Non-Performing Loans (NPLs) and this research aims to address the NPLs through improving credit risk management. Rather than the previous literature where Western models are introduced into China directly or with minor modification, this work advocates building on China’s conventional domestic methods to deal with uncertainty. We briefly review the background of the Chinese banking history with an evolutionary view and examine Chinese conventions in the development of the credit market. Based on an overview of this history, it is argued that Soft Budget Constraints (SBC) and the underdeveloped risk-assessing mechanism contributed to the accumulation of NPLs. Informed by Western models and experience, we have made several suggestions about rebuilding the Chinese convention of credit risk assessment, based on an analysis of publications and interviews with Chinese bankers. We also suggest some further development of the Asset Management Companies (AMCs) which are used to dispose of the NPLs.

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Bordelon, Laura. "Austral autumn and winter seasonal affects [sic] on benthic foraminiferal communities : Bransfield and northern Gerlache Straits /". Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1967963301&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Bezhanyan, Armen. "Citizens' ownership over the state and its role in the pricipal [sic]-agent model of corruption". Laramie, Wyo. : University of Wyoming, 2009. http://proquest.umi.com/pqdweb?did=1962984651&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Racey, Deborah E. "Effects of response frequency constraints on earning [sic] in a non-stationary multi-armed bandit task /". Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1967963381&sid=5&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Madden, Tanya D. "Effects of fecal contaminant Eschericia [sic] coli on the bovine venereal pathogen Tritrichomonas foetus in culture". Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1453232681&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Petrik, David. "The role of the ß4 subunit in phosphorylation of calcium-activated potassum [sic] channels a dissertation /". San Antonio : UTHSC, 2008. http://proquest.umi.com.libproxy.uthscsa.edu/pqdweb?did=1588771871&sid=3&Fmt=2&clientId=70986&RQT=309&VName=PQD.

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Tito, Cajia Lucio Virgilio. "Influencia de la metodología SBC en la prevención y reducción del número de accidentes en Came Contratistas y Servicios Generales S.A. cc 047 - proyecto Antamina – periodo 2014". Master's thesis, Universidad Nacional Mayor de San Marcos, 2019. https://hdl.handle.net/20.500.12672/11186.

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Determina la influencia de la metodología SBC en la prevención y reducción del número de accidentes en la empresa CAME Contratistas y Servicios Generales S.A. Para ello se da a conocer las bases teóricas, conceptuales y técnicas de la Seguridad Basada en el Comportamiento (SBC) orientada a identifica y cambia los comportamientos de riesgo de los trabajadores, por comportamientos seguros a partir de la generación de planes de acción, buscando contribuir en la reducción de accidentes e incidentes y la mejora de la gestión de seguridad. La investigación realizada fue del tipo semi experimental, con una muestra de 120 personas, en donde se generó una muestra aleatoria simple, proporcional y permanente, utilizando las técnicas de recolección de datos de campo mediante el uso de las cartillas SBC con los observadores de seguridad, y la de gabinete ingresando la información en el software SBC para determinar los comportamientos. Este proceso y gestión de los comportamientos, permitió reducir el número de accidentes e incidentes, los cuales fueron caracterizados al realizar el comparativo de los datos estadísticos de los años 2012 y 2013 con respecto al año 2014, mostrando una mejora significativa en el performance de seguridad de la empresa. Luego de todo este proceso se puede afirmar que la metodología SBC si influencia positivamente en la prevención y reducción de accidentes.
Tesis

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Hernández, Guerra de Aguilar Manuel. "Síndrome de Budd-Chiari. Avances en el conocimiento de su fisiopatología y nuevas estrategias terapeuticas". Doctoral thesis, Universitat de Barcelona, 2006. http://hdl.handle.net/10803/2221.

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El síndrome de Budd-Chiari (SBC) es una enfermedad poco frecuente que no obstante afecta a población joven con una alta morbimortalidad. A pesar del gran esfuerzo investigador realizado, quedan aún por hacer avances en el conocimiento fisiopatológico y en el ámbito terapéutico, ambos estrechamente vinculados, que mejoren el pronóstico de estos enfermos. Sin embargo, la baja incidencia de esta enfermedad ha dificultado la realización de estudios prospectivos y la obtención de resultados de inequívoca interpretación.

Mediante esta tesis, se estudian dos aspectos de esta entidad: uno fisiopatológico, cuyo objetivo es profundizar en el conocimiento de las consecuencias hemodinámicas sistémicas derivadas de la obstrucción al flujo venoso hepático; y otro terapéutico, que consiste en evaluar la utilidad de las prótesis recubiertas de politetrafluoroetilino (PTFE) en el TIPS comparándolas con prótesis no recubiertas con el objetivo de contrastar su eficacia.

Para llevar a cabo el primer estudio de esta tesis doctoral, se evaluan parámetros hemodinámicos sistémicos, sistemas neurohumorales vasoactivos y expansión de la volemia plasmática en enfermos con SBC, y en segundo lugar se comparan los resultados hemodinámicos de enfermos con SBC frente a una cohorte de enfermos cirróticos con hipertensión portal sinusoidal. El hallazgo más notable es que los enfermos con SBC grave presentan activación de los sistemas neurohumorales vasoactivos con actividad de renina plasmática elevada y niveles elevados de aldosterona y norepinefrina. Esta activación también se acompañó de un aumento de la volemia plasmática. Sin embargo, y a diferencia de lo que ocurre en enfermos con hipertension portal sinusoidal y presinusoidal, los enfermos con SBC no presentan descenso de las resistencias vasculares sistémicas totales, al menos en fases iniciales, lo cual sugiere que otros mecanismos fisiopatológicos son responsables de la activación de sistemas vasoactivos y de la expansión de la volemia. En la cohorte de enfermos estudiada el gasto cardiaco permanece en rangos normales. Es probable que la ausencia de anemia y la disminución del retorno venoso influyan evitando un aumento del gasto cardiaco a pesar del aumento en la volemia plasmática.

En el segundo estudio se parte de la hipótesis de que el empleo de las nuevas prótesis recubiertas de PTFE, utilizadas para el TIPS de enfermos con SBC, se asocia a una menor tasa de disfunciones y disminuyen las complicaciones asociadas, mejorando los resultados obtenidos con prótesis no recubiertas. Para ello se compara los efectos de las distintas prótesis sobre la tasa de disfunción del TIPS y eventos clínicos. En segundo lugar, se compara el número de reintervenciones (angioplastias, restenting) necesarias para mantener el shunt permeable y número total de prótesis utilizadas; número de ingresos y días de hospitalización durante el seguimiento en ambos grupos. Por ultimo, se evalúa la seguridad y eficiencia del empleo de prótesis recubiertas en enfermos con SBC que requieren un TIPS. Se demuestra que en los pacientes con SBC grave el TIPS constituye un tratamiento seguro y eficaz que controla los síntomas de la enfermedad refractaria a tratamiento médico. Las nuevas prótesis recubiertas de PTFE en el TIPS mejoran la tasa de disfunción por estenosis o trombosis con respecto a las prótesis no recubiertas. A su vez, la menor tasa de disfunción observada repercute en un menor número de reintervenciones, ingresos hospitalarios y días de estancia hospitalaria. En base a los resultados de este segundo estudio las prótesis recubiertas de PTFE deberían ser la primera opción al utilizar el TIPS en enfermos con SBC.
Budd-Chiari syndrome (BCS) is an uncommon liver disease defined as an obstruction to hepatic venous outflow. The obstruction of the hepatic venous outflow leads to sinusoidal congestion, centrilobular necrosis, fibrosis and portal hypertension with severe complications.
In order to deepen in the BCS, the first study address the hemodynamic changes that take place in BCS, which are well described in cirrhotic patients with sinusoidal portal hypertension, but remain uncertain in Budd-Chiari patients with postsinusoidal portal hypertension. In a large series of patients with advanced BCS, the systemic circulation, the vasoactive neurohumoral systems and plasma volume were assessed and compared with the systemic hemodynamics of those obtained in a group of cirrhotic patients. BCS patients had mean systemic, cardiopulmonary pressures and cardiac index within normal range, but significantly different from that of a group of cirrhotic patients. Despite most of the BCS patient exhibited normal systemic vascular resistance, BCS patients had activation of the neurohumoral vasoactive systems and plasma volume expansion. In conclusion, patients with BCS had activation of vasoactive neurohumoral systems and expanded plasma volume. This was observed despite these patients did not show increased CI and systemic vasodilation, which is in marked contrast with what is observed in patients with cirrhosis of the liver.
The second study focus on the treatment of BCS patients with portal hypertension, with transjugular intrahepatic portosystemic shunts (TIPS) using new developed stents. The polytetrafluoroethylene (PTFE)-covered stents have demonstrated to decrease shunt dysfunction in cirrhosis. Therefore, the aim of this study was to analyze and compare the incidence of TIPS dysfunction in patients treated with bare stents and covered stents. After a median follow-up period of nearly 2 years, 87% of patients receiving bare stents had TIPS dysfunction vs. 33% receiving PTFE-covered stents (actuarial rates of primary patency 19 % vs. 67 % at 1 year). Futhermore, the number of additional interventional procedures to maintain TIPS patency and clinical relapses were significantly greater in the bare stent than in the PTFE-covered stent group. In conclusion, our findings suggest that PTFE-covered stents should be preferred in these patients.

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Vinh, Huy. "The application of Holand's [sic] theory to career counseling in Vietnam : helping Vietnamese adolescents find their future /". Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1594484891&sid=7&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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