Made available in DSpace on 2018-08-01T23:40:25Z (GMT). No. of bitstreams: 1 tese_11544_Dissertação_Emanuel_Versão_Final20180131-115221.pdf: 2670227 bytes, checksum: 80557f8a62de4b4543889b19e3f60459 (MD5) Previous issue date: 2017-10-31 / Este estudo foi desenvolvido com o objetivo de analisar o efeito da qualidade do site na relação entre os atributos do vinho e o risco percebido em compras de vinhos online e, ainda, analisar o seu efeito na relação entre o risco percebido em compras de vinhos online e a intenção de recompra de vinhos online. O interesse por esse tema se deu, primeiramente, pelo fato de o consumo de vinhos no Brasil ter apresentado um substancial crescimento nos últimos anos, o que se permite supor tratar-se de um segmento de mercado em franca expansão e, ainda, pelo crescente uso da internet como um canal alternativo de compras deste produto, o qual apresenta complexidades peculiares, desde o processo de decisão de compra até o seu consumo. Com base na revisão da literatura, foi elaborado o modelo conceitual deste estudo, assim como o questionário utilizado para verificar se as relações teóricas observadas se confirmariam na amostra selecionada para este trabalho. A coleta de dados foi operacionalizada a partir do envio do questionário, por e-mail, à uma amostra composta por 5.200 possíveis respondentes, todos usuários de um dos maiores e-commerce de vinhos do mundo, tendo sido coletadas 376 respostas, durante o mês de setembro de 2017, as quais foram submetidas às análises multivariadas por meio da técnica da modelagem de equações estruturais, com o auxílio do pacote PLS-PM utilizado no software “R”. Os resultados demonstraram que os atributos do vinho não apresentaram significância estatística na relação com o risco percebido em compras de vinhos online. Por outro lado, foram encontradas evidências de que o risco percebido em compras de vinhos online impacta negativamente a intenção de recompra de vinhos online. Por fim, não foram encontradas evidências que permitissem afirmar o efeito moderador da qualidade do site nas relações observadas neste estudo. Os resultados desta pesquisa foram discutidos e, ao final, apresentaram-se as suas limitações e algumas sugestões para pesquisas futuras. / The purpose of this study was to analyze the effect of site quality on the relationship between wine attributes and perceived risk in online wine purchases, and to analyze its effect on the relationship between perceived risk in online wine purchases and the online wine repurchase intention. The interest in this theme came first because the consumption of wines in Brazil has shown a substantial growth in recent years, assuming that it is a rapidly expanding market segment and due to the increasing use of the internet as an alternative channel of purchases of this product, which presents peculiarities, from the purchase decision process to its consumption. Based on the literature review, the conceptual model of this study was elaborated, as well as the questionnaire used to verify if the theoretical relationships would be confirmed in the sample selected for this study. The data collection were done by sending the questionnaire, by e-mail, to a sample composed of 5,200 potential respondents, all users of one of the largest e-commerce wines in the world. Three hundred and seventy-six responses were collected in September 2017, which were subjected to multivariate analysis using the structural equation modeling technique in the PLS-PM package using software R. The results showed that the attributes of the wine did not present statistical significance in relation to the perceived risk in online wine purchases. On the other hand, there is evidence that the perceived risk in online wine purchases negatively affects the online wine repurchase intention. Finally, no evidence was found to support the moderating effect of site quality on the relationships observed in this study. The results of this research were discussed and, at the end, its limitations and some suggestions for future research are presented.

Made available in DSpace on 2018-08-01T23:40:20Z (GMT). No. of bitstreams: 1 tese_10014_LARISSA SINCORÁ - DISSERTAÇÃO_VERSÃO FINAL_CAPA DURA.pdf: 2216917 bytes, checksum: 9fa69e4311823dccf2820e6e65e9abbf (MD5) Previous issue date: 2016-06-20 / CAPES / Esta dissertação foi desenvolvida com o intuito de avaliar o papel exercido pelas capabilidades analíticas organizacionais quando relacionadas à maturidade de gestão de processos de negócio e à resiliência organizacional. A motivação para o estudo, por sua vez, se insere num contexto no qual a sobrevivência e o crescimento das organizações estão ligados às suas capabilidades de efetivamente utilizar grandes volumes de dados provenientes de diferentes fontes para auxiliar em suas orientações estratégicas e operacionais, constituindo atualmente um fator crítico para o sucesso. Isto se evidencia porque diversas empresas, de diferentes segmentos de atuação, e de várias partes do mundo, têm adotado a abordagem analítica como um diferencial competitivo em suas operações com capacidade de influenciar as demais variáveis organizacionais. Por conseguinte, a partir da fundamentação teórica dos construtos, foi possível identificar seus domínios e formas de operacionalização, bem como as relações teóricas existentes, o que resultou no delineamento do modelo teórico da pesquisa e no questionário do tipo survey. Quanto ao percurso metodológico, a aplicação do questionário foi conduzida pelo IEL/FINDES (Instituto Euvaldo Lodi vinculado à Federação das Indústrias do Estado do Espírito Santo) a partir do envio de carta-convite aos informantes-chave da pesquisa, durante os meses de setembro a dezembro de 2015. Dessa maneira, a técnica de análise de dados empregada para avaliar as relações hipotetizadas e a qualidade do modelo teórico elaborado, consistiu-se na modelagem de equações estruturais, por meio do software Smart PLS-SEM 3.0, baseado no algoritmo dos mínimos quadrados parciais (PLS-SEM). Em seguida, após o tratamento dos dados, os resultados foram interpretados e discutidos, apontando para a existência de relações estatisticamente significativas e coerentes com o aporte teórico. Logo, foi possível concluir que as capabilidades analíticas organizacionais atuam como antecedentes de resiliência organizacional, bem como desempenham o papel de moderar a relação existente entre a maturidade de gestão de processos de negócio e a resiliência organizacional. Por fim, se teceu as considerações finais, contendo as limitações do estudo, as contribuições para a evolução dos temas pesquisados e as recomendações de futuras pesquisas em tópicos tangentes às respectivas temáticas investigadas. / This work was developed in order to evaluate the role played by organizational analytical capabilities as they relate to business processes management maturity and organizational resilience. The motivation for the study, in turn, is a part of a context in which the survival and growth of organizations are connected to their capabilities to effectively use large amounts of data from different sources to assist in their strategic and operational guidelines, being currently a critical success factor. It becomes clear because several companies from different segments and in various parts of the world have adopted the analytical approach as a operational competitive advantage, with the ability to influence other organizational variables. Therefore, through the theoretical foundations of the constructs were identified domains and forms of implementation, as well the existing theoretical relationships, which resulted in the delineation of the theoretical research model and the questionnaire used for the survey. As for the methodological approach, the questionnaire was conducted by IEL/FINDES (Institute Euvaldo Lodi linked to the Federation of Industries of the State Espírito Santo) from sending an invitation letter to key-informants of the research, during the months of September to December 2015. Thus, the data analysis technique used to evaluate the hypothesized relationships and the quality of the developed theoretical model consisted on structural equation modeling by using the software Smart PLS-SEM 3.0, based on the algorithm of partial least squares (PLS-SEM). Therefore, it was concluded that the organizational analytical capabilities acts as organizational resilience antecedents, as well plays the role of moderating the relationship between the business processes management maturity and organizational resilience. In addition, after data treatment, the results were analyzed and discussed, pointing to the existence of statistically significant and consistent relations with the theoretical framework. Finally, were made the final considerations, exposing the study's limitations, the contributions to the evolution of the researched topics, and future research recommendations on tangential topics related to the themes investigated.

A fault monitoring system in general, which, beside the detection, isolation, diagnosis and fault recuperation steps is a research area of great interest, since the fault occurrence may lead to negative consequences on different levels on social, economical and environmental bases. With the increasing complexity of the industrial process, it is often necessary a quick detection leading to an optimized fault management system and therefore avoiding the loss of material and human resources. This work develops a study on fault detection statistical techniques applied to a didactic plant. The didactic plant deployed in this study comprises a controlled simple industrial process. For the fault detection in this process it were applied the main statistical methods: Principal Component Analysis (PCA) and Partial Least Squares (PLS). Those methods were implemented and applied on the process aiming a comparative analysis concerning themselves. As a result, the methods were able to detect every kind of emulated fault, with little or none detection delay and with similar performances. / Um sistema de monitoramento de falhas em geral, que além da detecção inclui etapas de isolamento, diagnóstico e recuperação das falhas, é uma área de pesquisa de grande interesse, uma vez que a ocorrência de falhas pode ter consequências negativas em diversos níveis, com impactos socioeconômicos e ambientais. Em processos industriais cada vez mais complexos, é necessária uma rápida detecção de falhas, exigindo um sistema de gerenciamento de falhas otimizado, de modo a evitar perdas de recursos materiais e humanos. Este trabalho desenvolve um estudo sobre técnicas estatísticas de detecção de falhas aplicadas numa planta didática. A planta didática empregada no estudo compreende um processo industrial simples controlado. Para a detecção das falhas nesse processo, foram aplicados os principais métodos estatísticos: Análise de Componentes Principais (PCA) e Mínimos Quadrados Parciais (PLS). Estes métodos foram implementados e aplicados ao processo objetivando uma análise comparativa entre os mesmos. Como resultado, os métodos foram capazes de detectar todos os diferentes tipos de falhas emuladas, com pouco ou nenhum atraso na detecção e com desempenhos similares.

This study is mainly designed to investigate the issue of acceptance and use of Information and Communication Technologies (ICTs), and examine factors that influence and predict acceptance and use of ICTs among Staff Members (SMs) of Khartoum State Universities (KSUs) (Sudan). To achieve these objectives the study was structured in seven chapters that represent the chronological development of the study. The review of the literature allows for the development of a study conceptual framework, instruments, and methodology of the study. A mixed methodology, mainly quantitative questionnaire of a deductive nature and qualitative methods, was employed. Of 787 questionnaires randomly distributed 527 (a response rate 67 %,) was received and analysed. The analysis was performed using SPSS, Smart Partial Least Squire (Smart-PLS), and qualitative analysis. Thus, descriptive, explanatory, and content analyses were presented and discussed. The results of the analysis of the situations and variations provide important information on SMs’ skills, experience, purposes and duration of ICT use. The result revealed that, ICTs were widely used by most SMs. However, relatively low numbers of SMs used ICTs in teaching. Perceived usefulness (PU) and SMs’ intrinsic motivation were the main reasons that motivated SMs to use ICTs. Amongst different purposes of using ICTs, SMs use it principally for teaching and academic purposes. Among many suggested constrains, specific infrastructure, organization, and individual level were strongly agreed on as the main problem that hinder SMs’ ICT use. The statistical analysis revealed that the use of ICTs for teaching and the duration of this use vary significantly with variations in SMs’ demographic and personal characteristics. In order to examine factors influencing SMs’ acceptance and use of ICTs, a conceptual framework and relevant instruments of data collections, which was based on technology acceptance model (TAM) supported by other models, were developed. The analysis of Structural equation modelling (SEM) via smart-PLS confirmed the reliability and validity of the measurements and the structural models. The results of the analysis of the structural models indicate that nine out of thirteen claimed hypotheses were proved and supported. The findings proved applicability and the validity of TAM in predicting SMs’ acceptance and use of ICTs in the study context. SMs’ acceptance of ICTs was found to. / Die vorliegende Arbeit beleuchtet die Fragen der Akzeptanz und Nutzung von Informations- und Kommunikationstechnologien (IKT). Sie untersucht am Beispiel des Lehrpersonals von staatlichen sowie privaten Universitäten im Bundesland Khartum (Sudan), welche Faktoren und Einflüsse eine Vorhersage von IKT-Akzeptanz und Nutzung ermöglichen. Die Darstellung gliedert sich in sieben Kapiteln, die die chronologische Entwicklung der Studie repräsentieren. Ein vorausgehendes umfangreiches Literaturstudium ist die Grundlage für den konzeptionellen Rahmen und die Methodik der vorgelegten Arbeit. Die Ergebnisse der Arbeit beruhen auf einer Mischung von quantitativen (Fragebogen) und qualitativen (Interviews und eigene Beobachtung) Untersuchungsmethoden. Die Hauptuntersuchungsmethode war ein bereits vorhandener Fragebogen, dessen inhaltliche Gliederung ergänzt, präzisiert und weiter entwickelt wurde für die Anwendungsgebiete im Sudan. Die Grundlage war die Befragung von 787zufällig ausgewählten Lehrkräften aus sieben privaten sowie sieben staatlichen Universitäten. Von den 787 ausgegebenen Fragebögen konnten 527 (67%) ausgewertet werden. Diese Auswertung erfolgte mittels SPSS, Smart PLS. Dazu wurde zusätzlich eine qualitative analyse genutzt. So wurden deskriptive, explorative und enthaltene Analysen vorgestellt und diskutiert. Die Ergebnisse der Analyse der Situationen und Variationen liefern wichtige Informationen über SMs 'Fähigkeiten, Erfahrung und Dauer der IKT-Nutzung. Dabei konnte nachgewiesen werden, dass eine IKT-Nutzung unter den Befragten Lehrkräften zwar generell weit verbreitet ist, in Lehrkontexten jedoch erkennbar seltener Anwendung findet. Für eine IKT-Nutzung wesentliche Gründe stellen die intrinsische Motivation eine Person sowie soziale, kulturelle und organisatorische Normen dar. Als Hemmnisse eine IKT-Nutzung werden nicht nur organisatorische und administrative Mängel und Schwächen, sondern auch individuelle Einflüsse bennant. Die Nutzung von IKT für die Lehre und die Dauer ihrer Verwendung konnte dargestellt werden als einige erheblich variierte demographische und persönliche Eigenschaften Zur Untersuchung von Einflussfaktoren auf die Lehrpersonal Akzeptanz und die Nutzung von IKT wurden ein konzeptioneller Rahmen und relevante Instrumente der Datensammlungen auf der Basis des Technologieakzeptanz Modells (TAM), unterstützt von anderen Modellen, entwickelt. Die Analyse von Strukturgleichungsmodellen (SEM) via Smart-PLS bestätigen die Zuverlässigkeit und Gültigkeit der Messmodelle. Die Ergebnisse der Analyse der Strukturmodelle zeigen, dass neun von dreizehn Hypothesen geprüft und bestätigt wurden. Im Rahmen der Studie bewiesen die Ergebnisse die Anwendbarkeit und Gültigkeit der TAM in der Vorhersage SMs Akzeptanz und Nutzung von IKT. Es wurde festgestellt, dass die Lehrpersonal Akzeptanz von IKT vor allem von PU und Benutzerfreundlichkeit (PEU) beeinflusst und bestimmt werden. Ergebnisse zeigen, dass Situationsfaktoren (SFs) dominanten Einfluss auf die Nutzung von IKT SMs haben Dagegen wurden Einschränkungen (COs) gefunden, um negative nicht signifikante Wirkungen zu haben. Die Erleichterungs-Faktoren (FF) haben jedoch positive dominant signifikante Wirkungen. Bei der Nutzung und Akzeptanz von IKT wurde außerdem festgestellt, dass sie direkt und indirekt von sozialen Faktoren (SIP) und kulturellen Faktoren (CUFs) beeinflusst werden. Die Tests mit Hilfe der Multigruppenanalyse(MGA) zeigen, dass die Kultur mäßigende Wirkung auf SMs IKT Akzeptanz und Nutzung hat. Die Ergebnisse wurden weiter unterstützt und ergänzt durch Informationen aus eingehenden Interviews und Beobachtungen. Bei der abschließenden Diskussion wurde festgestellt, dass einige Ergebnisse in der einschlägigen Literatur nicht unterstützt werden. Die Diskussion schlussfolgert zu den entwickelten Modellen von IKT, dass sie die positiven signifikanten (direkten und mäßigenden) Beziehungen von reflektierenden Faktoren enthalten, die die IKT Nutzung und Akzeptanz durch das Lehrpersonal in KSUs beeinflussen. Die Studie impliziert: Beiträge zu Wissen, Theorie und Praxis wurden weiter diskutiert, gefolgt von Schlussfolgerungen und Empfehlungen.

Cette thèse porte sur l’estimation d'une fonction de régression fournissant la meilleure relation entredes variables pour lesquelles on possède un certain nombre d’observations. Une première partie portesur une étude par simulation de deux méthodes automatiques de sélection du paramètre de laprocédure d'estimation ridge. D'un point de vue plus théorique, on présente et compare ensuite deuxméthodes de sélection d'un multiparamètre intervenant dans une procédure d'estimation d'unefonction de régression sur l'intervalle [0,1]. Dans une deuxième partie, on étudie la qualité del'estimateur PLS1, d'un point de vue théorique, à travers son risque quadratique et, plus précisément,le terme de variance dans la décomposition biais/variance de ce risque. Enfin, dans une troisièmepartie, une étude statistique sur données réelles est menée afin de mieux comprendre la signaturegénique de cellules cancéreuses à partir de la signature génique des sous-types cellulaires constituantle stroma tumoral associé / This thesis deals with the estimation of a regression function providing the best relationship betweenvariables for which we have some observations. In a first part, we complete a simulation study fortwo automatic selection methods of the ridge parameter. From a more theoretical point of view, wethen present and compare two selection methods of a multiparameter, that is used in an estimationprocedure of a regression function on [0,1]. In a second part, we study the quality of the PLS1estimator through its quadratic risk and, more precisely, the variance term in its bias/variancedecomposition. In a third part, a statistical study is carried out in order to explain the geneticsignature of cancer cells thanks to the genetic signatures of cellular subtypes which compose theassociated tumor stroma

This study is mainly designed to investigate the issue of acceptance and use of Information and Communication Technologies (ICTs), and examine factors that influence and predict acceptance and use of ICTs among Staff Members (SMs) of Khartoum State Universities (KSUs) (Sudan). To achieve these objectives the study was structured in seven chapters that represent the chronological development of the study. The review of the literature allows for the development of a study conceptual framework, instruments, and methodology of the study. A mixed methodology, mainly quantitative questionnaire of a deductive nature and qualitative methods, was employed. Of 787 questionnaires randomly distributed 527 (a response rate 67 %,) was received and analysed. The analysis was performed using SPSS, Smart Partial Least Squire (Smart-PLS), and qualitative analysis. Thus, descriptive, explanatory, and content analyses were presented and discussed. The results of the analysis of the situations and variations provide important information on SMs’ skills, experience, purposes and duration of ICT use. The result revealed that, ICTs were widely used by most SMs. However, relatively low numbers of SMs used ICTs in teaching. Perceived usefulness (PU) and SMs’ intrinsic motivation were the main reasons that motivated SMs to use ICTs. Amongst different purposes of using ICTs, SMs use it principally for teaching and academic purposes. Among many suggested constrains, specific infrastructure, organization, and individual level were strongly agreed on as the main problem that hinder SMs’ ICT use. The statistical analysis revealed that the use of ICTs for teaching and the duration of this use vary significantly with variations in SMs’ demographic and personal characteristics. In order to examine factors influencing SMs’ acceptance and use of ICTs, a conceptual framework and relevant instruments of data collections, which was based on technology acceptance model (TAM) supported by other models, were developed. The analysis of Structural equation modelling (SEM) via smart-PLS confirmed the reliability and validity of the measurements and the structural models. The results of the analysis of the structural models indicate that nine out of thirteen claimed hypotheses were proved and supported. The findings proved applicability and the validity of TAM in predicting SMs’ acceptance and use of ICTs in the study context. SMs’ acceptance of ICTs was found to. / Die vorliegende Arbeit beleuchtet die Fragen der Akzeptanz und Nutzung von Informations- und Kommunikationstechnologien (IKT). Sie untersucht am Beispiel des Lehrpersonals von staatlichen sowie privaten Universitäten im Bundesland Khartum (Sudan), welche Faktoren und Einflüsse eine Vorhersage von IKT-Akzeptanz und Nutzung ermöglichen. Die Darstellung gliedert sich in sieben Kapiteln, die die chronologische Entwicklung der Studie repräsentieren. Ein vorausgehendes umfangreiches Literaturstudium ist die Grundlage für den konzeptionellen Rahmen und die Methodik der vorgelegten Arbeit. Die Ergebnisse der Arbeit beruhen auf einer Mischung von quantitativen (Fragebogen) und qualitativen (Interviews und eigene Beobachtung) Untersuchungsmethoden. Die Hauptuntersuchungsmethode war ein bereits vorhandener Fragebogen, dessen inhaltliche Gliederung ergänzt, präzisiert und weiter entwickelt wurde für die Anwendungsgebiete im Sudan. Die Grundlage war die Befragung von 787zufällig ausgewählten Lehrkräften aus sieben privaten sowie sieben staatlichen Universitäten. Von den 787 ausgegebenen Fragebögen konnten 527 (67%) ausgewertet werden. Diese Auswertung erfolgte mittels SPSS, Smart PLS. Dazu wurde zusätzlich eine qualitative analyse genutzt. So wurden deskriptive, explorative und enthaltene Analysen vorgestellt und diskutiert. Die Ergebnisse der Analyse der Situationen und Variationen liefern wichtige Informationen über SMs 'Fähigkeiten, Erfahrung und Dauer der IKT-Nutzung. Dabei konnte nachgewiesen werden, dass eine IKT-Nutzung unter den Befragten Lehrkräften zwar generell weit verbreitet ist, in Lehrkontexten jedoch erkennbar seltener Anwendung findet. Für eine IKT-Nutzung wesentliche Gründe stellen die intrinsische Motivation eine Person sowie soziale, kulturelle und organisatorische Normen dar. Als Hemmnisse eine IKT-Nutzung werden nicht nur organisatorische und administrative Mängel und Schwächen, sondern auch individuelle Einflüsse bennant. Die Nutzung von IKT für die Lehre und die Dauer ihrer Verwendung konnte dargestellt werden als einige erheblich variierte demographische und persönliche Eigenschaften Zur Untersuchung von Einflussfaktoren auf die Lehrpersonal Akzeptanz und die Nutzung von IKT wurden ein konzeptioneller Rahmen und relevante Instrumente der Datensammlungen auf der Basis des Technologieakzeptanz Modells (TAM), unterstützt von anderen Modellen, entwickelt. Die Analyse von Strukturgleichungsmodellen (SEM) via Smart-PLS bestätigen die Zuverlässigkeit und Gültigkeit der Messmodelle. Die Ergebnisse der Analyse der Strukturmodelle zeigen, dass neun von dreizehn Hypothesen geprüft und bestätigt wurden. Im Rahmen der Studie bewiesen die Ergebnisse die Anwendbarkeit und Gültigkeit der TAM in der Vorhersage SMs Akzeptanz und Nutzung von IKT. Es wurde festgestellt, dass die Lehrpersonal Akzeptanz von IKT vor allem von PU und Benutzerfreundlichkeit (PEU) beeinflusst und bestimmt werden. Ergebnisse zeigen, dass Situationsfaktoren (SFs) dominanten Einfluss auf die Nutzung von IKT SMs haben Dagegen wurden Einschränkungen (COs) gefunden, um negative nicht signifikante Wirkungen zu haben. Die Erleichterungs-Faktoren (FF) haben jedoch positive dominant signifikante Wirkungen. Bei der Nutzung und Akzeptanz von IKT wurde außerdem festgestellt, dass sie direkt und indirekt von sozialen Faktoren (SIP) und kulturellen Faktoren (CUFs) beeinflusst werden. Die Tests mit Hilfe der Multigruppenanalyse(MGA) zeigen, dass die Kultur mäßigende Wirkung auf SMs IKT Akzeptanz und Nutzung hat. Die Ergebnisse wurden weiter unterstützt und ergänzt durch Informationen aus eingehenden Interviews und Beobachtungen. Bei der abschließenden Diskussion wurde festgestellt, dass einige Ergebnisse in der einschlägigen Literatur nicht unterstützt werden. Die Diskussion schlussfolgert zu den entwickelten Modellen von IKT, dass sie die positiven signifikanten (direkten und mäßigenden) Beziehungen von reflektierenden Faktoren enthalten, die die IKT Nutzung und Akzeptanz durch das Lehrpersonal in KSUs beeinflussen. Die Studie impliziert: Beiträge zu Wissen, Theorie und Praxis wurden weiter diskutiert, gefolgt von Schlussfolgerungen und Empfehlungen.

Empirischen Studien zufolge können Patente sich positiv auf den Unternehmenserfolg auswirken. Allerdings wirkt dieser Effekt nicht automatisch, sondern Unternehmen müssen sich um den Aufbau und die gesteuerte Weiterentwicklung eines nachhaltigen und wertvollen Patentportfolios bemühen. Bisher ist jedoch nicht wissenschaftlich untersucht worden, welche Maßnahmen Unternehmen ergreifen können, um die unternehmensinternen Vorraussetzungen für eine erfolgreiche Steuerung von Patentaktivitäten zu schaffen. Um diese betrieblichen Faktoren zu identifizieren und deren Relevanz zu quantifizieren, wurden 2005 in einer breiten empirischen Untersuchung die aktiven Patentanmelder im deutschsprachigen Raum (über 1.000 Unternehmen) mit Hilfe eines standardisierten Fragebogens befragt. Auf der Basis von 325 auswertbaren Fragebögen (Ausschöpfungsquote 36,8 %) konnten zum einen Ergebnisse zum aktuellen Aufgabenspektrum der Patentabteilungen sowie zu deren organisatorischen und personellen Strukturen gewonnen werden. Ebenfalls wurde in dieser Status quo-Analyse der Bekanntheits- und Implementierungsgrad von Methoden und Systemen (z. B. Patentbewertungsmethoden, Patent-IT-Systeme) beleuchtet. Zum anderen wurden die betrieblichen Faktoren herausgestellt, auf die technologieorientierte Unternehmen achten sollten, um das Fundament für eine erfolgreiche Patentsteuerung zu legen. / Empirical studies have shown that patents can have a positive effect on corporate success. However, this effect does not occur by itself. Companies have to make an effort to create and to develop a sustainable patent portfolio. So far, no academic studies have investigated into which actions a company can take to establish the internal conditions for successful patent management. To identify and to quantify the relevance of these internal factors, a study was conducted using a standardized written questionnaire with more than 1,000 patent-oriented companies in the German-speaking countries (Germany, Austria, Switzerland, Liechtenstein). In total, 325 valid questionnaires were included in the analyses; this corresponds to an above-average response rate of 36.8 %. These analyses revealed insights into the current task profile of patent departments and their organizational and personnel structures. This status quo analysis also included the investigation into the awareness and implementation level of used methods and systems (e. g. patent evaluation methods, patent IT systems). Furthermore, the study could expose the internal determinants, which technology-oriented companies should focus on to ensure a successful patent management.

京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第18597号 / 工博第3958号 / 新制||工||1608(附属図書館) / 31497 / 京都大学大学院工学研究科化学工学専攻 / (主査)教授 長谷部 伸治, 教授 大嶋 正裕, 教授 河瀬 元明 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

Unmanned aerial vehicles (UAVs) are emerging as enablers for supporting many applications and services, such as precision agriculture, search and rescue, temporary network deployment, coverage extension, and security. UAVs are being considered for integration into emerging wireless networks as aerial users, aerial relays (ARs), or aerial base stations (ABSs). This dissertation proposes employing UAVs to contribute to physical layer techniques that enhance the security performance of advanced wireless networks and services in terms of availability, resilience, and confidentiality. The focus is on securing terrestrial cellular communications against eavesdropping with a cellular-connected UAV that is dispatched as an AR or ABS. The research develops mathematical tools and applies machine learning algorithms to jointly optimize UAV trajectory and advanced communication parameters for improving the secrecy rate of wireless links, covering various communication scenarios: static and mobile users, single and multiple users, and single and multiple eavesdroppers with and without knowledge of the location of attackers and their channel state information. The analysis is based on established air-to-ground and air-to-air channel models for single and multiple antenna systems while taking into consideration the limited on-board energy resources of cellular-connected UAVs. Simulation results show fast algorithm convergence and significant improvements in terms of channel secrecy capacity that can be achieved when UAVs assist terrestrial cellular networks as proposed here over state-of-the-art solutions. In addition, numerical results demonstrate that the proposed methods scale well with the number of users to be served and with different eavesdropping distributions. The presented solutions are wireless protocol agnostic, can complement traditional security principles, and can be extended to address other communication security and performance needs.

A large amount of research has been conducted in order to seek explanations that clarify e-commerce acceptance throughout the world; however, there is a gap in the research as to how e-commerce acceptance is attributable to national culture. Two previous studies (Yoon, 2009), (Capece, et al., 2013) used Hofstede’s five dimensions of national culture in conjunction with the Technology Acceptance Model (TAM) as a means to filling this gap with perspectives on low-acceptance populations (China in 2008 and Italy in 2013). The study presented in this paper is a continuation of the previous work, offering a perspective on a high-acceptance population (Sweden). The main research question is about investigating how Swedish e-commerce acceptance is related to national culture, and the answer is sought by probing on the Swedish perspective of e-commerce in the light of the TAM, e-commerce trust, and Hofstede’s five dimensions of national culture in an online survey. The data is analyzed using Structural Equation Modeling (SEM), and compared to the findings of the Chinese and Italian precursors. Furthermore, an attempt is made to explain the contrast between the comparably high e-commerce acceptance in Sweden to the lower degrees of acceptance in China and Italy.