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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Avaliação estrutural de pavimento através de ensaio pressiométrico, ensaio de placa e CBR "in situ" em trecho rodoviário no Estado de Alagoas. / Structural evaluation of pavement through pressiometer tests, plate-loading tests and CBR "in situ" in a highway's space in the State of Alagoas.

SANTANA, José Mendes. 06 November 2018 (has links)
Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-11-06T19:15:45Z No. of bitstreams: 1 JOSÉ MENDES SANTANA - DISSERTAÇÃO PPGECA 1998..pdf: 8569106 bytes, checksum: e5c953b46b630109d605966ae3faa92d (MD5) / Made available in DSpace on 2018-11-06T19:15:45Z (GMT). No. of bitstreams: 1 JOSÉ MENDES SANTANA - DISSERTAÇÃO PPGECA 1998..pdf: 8569106 bytes, checksum: e5c953b46b630109d605966ae3faa92d (MD5) Previous issue date: 1998-03 / Neste trabalho são apresentados os resultados de ensaios efetuados "in situ" utilizando-se o pressiômetro de Briaud, Prova de Carga sobre Placas e CBR, e ensaios de laboratório, objetivando analisar comparativamente os resultados obtidos nos diferentes ensaios para avaliar estruturalmente as camadas constituintes do pavimento. É apresentada inicialmente uma revisão bibliográfica dando-se ênfase principalmente aos procedimentos teóricos para interpretações dos ensaios, descrição dos equipamentos e metodologia de utilização. A seguir é dada uma visão geral, envolvendo as características ambientais da região onde se localiza a rodovia, objeto da pesquisa, bem como a sistemática empregada na caracterização e definição dos parâmetros de resistência e deformabilidade dos materiais encontrados nas camadas do pavimento. Os resultados obtidos "in situ" envolvendo 79 (setenta e nove) ensaios de CBR, 46 (quarenta e seis) provas de carga sobre placas e 56 (cinquenta e seis) ensaios pressiométricos permitiram uma avaliação do comportamento do pavimento sob ponto de vista qualitativo.Finalmente, foram obtidas significativas correlações entre os parâmetros resultantes do CBR, ensaios de placa e pressiométricos. / In this work are presented the results made "in situ" and laboratory essays, using the Pressuremeter of Briaud, Plate-loading tests and CBR, objectifying to analyze the results obtained in the different essays to proceed a structural evaluation of the constituent layers of the pavement. It is presented a preliminary bibliographical revision being given emphasis mainly to the theoretical procedures for interpretations of the experiments, description of the equipments and use methodology. Next a general vision was carried out, involving the environmental characteristics of the área where the highway, object of the research, is located as well as the systematic used in the characterization and definition of the resistance and strain parameters of the materiais found in thelayers of the pavement. The obtained results "in situ" involving 79 (seventy nine) essays of CBR, 46 (forty six) load tests on plates and 56 (fifry six) pressuremeter tests allowed an evaluation of the behavior ofthe pavement under qualitative viewpoint. Finally, they were obtained significant correlations among the resulting parameters of CBR, plate-loading and pressuremeter tests.
32

Vliv modifikace na pevnost lepení buku

Šmíd, Pavel January 2019 (has links)
This diploma thesis is focused on the influence of thermal modification on the strength of bonded joint in tension according to ČSN EN 205. For the purpose of this work was used beech wood. The thermal modification of the test samples was performed at temperatures of 160 °C, 180 °C and 200 °C. The selected bond strength adhesives were melamine-urea formaldehyde adhesives (MUF), phenol-resorcinol formaldehyde adhesives (PRF) and one-component polyurethane adhesives (PUR). In addition to the thermal modification the effect of plasma modification on bond strength is also determined. The test lamellas were plasma treated (DCSBD) prior to gluing and pressing. The result is the determination of the tensile strength of the bonded joint in all the above-mentioned modifications and comparation of the results.
33

Konversionen zum Islam in westeuropäischen Gesellschaften.

Uhlmann, Milena 15 July 2021 (has links)
Konversionen zum Islam erregen Neugier, Faszination, und auch Angst – gerade seit den Terroranschlägen des 11. Septembers 2001 und den darauffolgenden islamistischen Anschlägen auch in Europa. Das Phänomen wirft besonders in diesem Kontext Fragen zu Motivation zur Konversion, dem Bezug der Konvertiten zu ihrem zum Herkunftskontext und zur sozialwissenschaftlichen und sicherheitspolitischen Bewertung des Phänomens auf. Um Antworten auf diese Fragen näher zu kommen, hat die Autorin zwischen 2009 und 2011 insgesamt 27 Konvertiten zum Islam in Deutschland, England und Frankreich interviewt und ihre Einstellungen, Identitätsausdeutungen und Relevanzen untersucht. Die Ergebnisse ihrer Auswertung setzt sie mit einer Betrachtung des Phänomens des jugendkulturellen Salafismus in Bezug und entwickelt auf dieser Basis zwei grundlegend unterschiedliche Kategorien des Wechsels zum Islam: Die „Konversion zum reflexiven Islam“ und die „Alternation zu einer jugendkulturellen Ausprägung des Salafismus“. / Conversions to Islam evoke curiosity, fascination, and also fear – especially since the terrorist attacks of September 11, 2001 and Islamist terrorist attacks that followed also in Europe. The phenomenon raises questions regarding the motifs for conversion, the relation of converts to their society of origin, and the sociological assessment as well as security policy aspects of the phenomenon. In order to come closer to answers to these questions, the author interviewed 27 converts to Islam in Germany, England and France, and analysed their attitudes, identity reconstruction and relevances. She compared the results with a reflection on the phenomenon of a youth-cultural phenomenon of Salafism and developed two fundamentally different categories of people choosing Islam as their religion: “conversion to reflexive Islam” and “alternation to a youth-cultural interpretation of Salafism”.
34

Lay internet usage

Christ, Mario 20 December 2002 (has links)
Trotz substantieller ökonomischer und sozialer Implikationen des World Wide Webs existiert noch immer eine überraschend große Forschungslücke in Bezug auf empirische Untersuchungen der Webnutzung. Insbesondere bezüglich der individuellen Webnutzung weiß man heute noch wenig über Schlüsselthemen dieses Forschungsfeldes, wie zum Beispiel die Anzahl der Webseitenbesuche von Individuen, der Loyalität von Nutzern, und den demographischen Charakteristika, die bestimmend für die Internetnutzung sind. Deshalb sieht sich diese Dissertation als Schritt zur Überbrückung dieser Forschungslücke. Sie präsentiert die gewonnenen Erkenntnisse verschiedener, voneinander abhängiger, empirischer Studien der individuellen Webnutzung Pittsburgher Bürger. Diese Dissertation erweitert die Forschung im Bereich individuellen Webnutzungsverhaltens durch: - die Analyse des Einflusses der steigenden Anzahl von Webangeboten auf die individuelle Webnutzung, - die anwendung sessionbasierter Maße auf individuelle Webnutzungsdaten, um Einsichten in den Verlauf der Webnutzung bei gleichzeitigem Anstieg der individuellen Weberfahrung zu erhalten, - die Analyse der Loyalitaet im Web von einzelnen Nutzergruppen, um die Frage zu beantworten, ob Nutzergruppen zu favorisierten Seiten im Web konvergieren, - spezifisches Herangehen an das Thema der Portalnutzung im Web und das Beantworten der Frage, ob sich Portalnutzer von durchschnittlichen Internetnutzern unterscheiden. Aus betriebswirtschaftlicher und volkswirtschaftlicher Sicht interessante Webnutzungsmaße werden entwickelt und diskutiert. Die Anwendung dieser Maße führt zu Erkenntnissen bezüglich signifikanter Trends. So wird beispielsweise deutlich, dass keinesfalls eine Gleichverteilung der Nutzung über Nutzer und Zeit besteht. Nutzer können in vier Gruppen mit verschiedenen Entwicklungskurven eingeteilt werden. Alle Nutzergruppen nähern sich über die Zeit Sättigungsgrenzen der Webnutzung an. Außerdem verbringen die meisten Nutzer nur wenig Zeit im Internet. Auch wird deutlich dass Loyalität im Web äußerst gering ist und Webnutzer trotz steigender Erfahrung im Umgang mit dem Internet nicht sonderlich gezieltes Surfverhalten entwickeln. Zusätzlich führt die Anwendung von Regressionsmodellen zu Erkenntnissen über die individuellen Charakteristika, welche die Webnutzung beeinflussen. Solch Charakteristika sind zum Beispiel ethnische Herkunft, Geschlecht, Haushaltseinkommen, Telefon- und Emailnutzung und Computerkenntnisse. Daher liefert die vorliegende Arbeit Erkenntnisse, welche sowohl aus betriebswirtschaftlicher Sicht als auch aus volkswirtschaftlicher Sicht Relevanz haben. Insbesondere können Marketingabteilungen, vor allem in der Informations- und Kommunikationsindustrie, von den vorliegen Resultaten profitieren. Themen wie Webloyalität und Webnutzung, die in der vorliegenden Arbeit angesprochen werden, sind insbesondere relevant für Geschäftsmodelle aus dem B2C Bereich. Adressaten sind dementsprechend zum Beispiel Internetfirmen, welche von Werbeeinkünften aus Bannerwerbung abhängig sind und Firmen, welche einen hohen Grad an Loyalität unter Ihren Webnutzern suchen. Außerdem bilden die Erkenntnisse die Grundlage für staatliche Initiativen, die der Sicherstellung des Zugangs zum Internet alle Gruppen der Bevölkerung dienen. Die vorliegende Arbeit reichert die empirische Grundlage, welche zum Verständnis individueller Webnutzung nötig ist, an. Die Erkenntnisse sind insbesondere für am neuen Informationszeitalter teilhabenden Individuen und Institutionen, auch staatlicher Art, interessant. / Despite the substantial social and economic implications of the World Wide Web, there is still a surprising lack of empirical research on Web usage. Specifically, at the level of the individual user, little is known about key issues of Internet usage, such as the trajectory of change over time in the number of visits to Web sites, the degree of individual loyalty to Web sites, and the demographics that determine Web usage. In order to overcome this lack of research, we report in this dissertation the results of several interrelated studies of individual Web usage patterns of average citizens from the Pittsburgh area. This dissertation advances the research on individual Web usage by: - analyzing the impact of increasing Web site visiting opportunities on Web utilization rates of individual users, - employing session-based measures to data on individual Web usage in order to identify how Web users change the way they use the Web as their level of expertise increases, - analyzing whether different user groups also differ in loyalty to Web sites and whether users converge over time to a set of favorite Web sites, - specifically dealing with the issue of Web portal utilization to answer the question whether Web portal users are different from average Web users. We develop measures of Web usage that are particularly relevant from a business and public policy perspective. By applying these measures to longitudinal data on Web usage, we identify significant trends in individual Internet usage. For example, we reveal that individual Web usage is not distributed equally across subgroups of users. Web users can be clustered into four groups with distinct trajectories of Web usage. All groups reach saturation in their extent of Web usage after following a downward path. Further, most Web users spent only limited time in the Web and only a small group of users uses the Web heavily. Also, users show consistently little loyalty to Web sites. Surprisingly, as Web users gain experience in using the Web, there does not seem to be a significant shift from undirected browsing to directed access of Web sites over time. We apply regression models in order to predict the determinants of Web utilization. Individual characteristics, such as ethnic background, gender, household income, phone usage, e-mail usage, and computer skill level, determine Web usage. Thus, the results have implications for both electronic commerce and public policy as it pertains to the digital divide. They are particularly useful for marketing departments, especially in the information and communication industry. Discussions of Web user loyalty and Web visiting opportunities as conducted in this dissertation are relevant to business models in use in business-to-consumer electronic commerce, especially for Internet companies that rely on advertising income generated from serving banner advertisements and companies that need to maintain a high degree of customer loyalty. The results also provide the factual foundation for key policy initiatives to promote access to the Internet for all groups of people. Policy makers need data on Internet usage in order to measure the size of a possible digital divide and ensure that everybody belonging to the present and the next generation - and not a subgroup of people only - has access to the Internet. In summary, this study advances the empirical foundation for understanding individual Web use. The findings of this dissertation will be useful to stakeholders in the new Information Age, in particular marketing departments and policy makers.
35

La "santé à tout prix" à l'épreuve de l'éthique : tenants et aboutissants d'un mythe moderne / “Health at any price” test of ethics : ins and outs of a modern myth

Leneveu, Marie-Claude 03 October 2014 (has links)
La thématique de recherche est d’analyser les tenants et les aboutissants du mythe moderne de santé parfaite via les démarches socio-anthropologique, philosophique et théologico-religieuse, afin de saisir sa problématique éthique. Examiner les transformations des pratiques thérapeutiques a demandé de retranscrire d’abord, sous un mode théorique, les principes qui sont aux fondements de l’exigence sanitaire pour étudier ensuite des expériences ad hoc. Aussi, supposé incarner cette idéologie, le dépistage systématique néonatal de la mucoviscidose relié aux centres de suivi génétique a été la base empirique d’un questionnement éthique spécifique, comme la responsabilité de l’homme face à la vulnérabilité et à la finitude humaine. Orientée par une éthique de la parole suggérant la création d’espaces de réflexion d’où émane une pensée créative, le concept de rite de passage - doté de sa dynamique d’accompagnement - apporte des indications sur la fonction d’une éthique du soin déterminée. / The topic of research is to analyze the ins and outs of modern myth of perfect health through socio-anthropological approaches, philosophical and theological-religious to grasp its ethical problems. Examining changes in treatment practices needed to transcribe first, from a theoretical mode, the principles are the foundations of sanitary requirement then consider ad hoc experiments. Also supposed to embody this ideology, systematic neonatal screening for cystic fibrosis related centers of genetic monitoring was the empirical basis for an ethical questioning sui generis, as the responsibility of the man facing the vulnerability and human finitude. Guided by an ethic of speech suggesting ultimately creating spaces for reflection where creative thinking follows the concept of “rite of passage" - with its accompanying dynamics - provides indications on reality based an ethic of care determined.
36

Příjem a posílání SMS zpráv pomocí aplikace určené pro platformu JavaME / SMS Application for JavaME Platform

Růčka, Lukáš January 2008 (has links)
The aim of this diploma thesis is to study the potential of Java ME platform for receiving and sending of SMS and to utilize obtained information subsequently in implementation of an application for this platform. The first part of the diploma thesis aims at explaining general terms of the Java language and its basic features. The next part deals with specific properties of the Java ME platform and properties of devices that support this platform. A design of the Java ME application based on theoretical knowledge is created then. This application has to be able to receive, process, store and send SMS and communicate with the server application based on the Java SE platform. The created Java ME application serves as an automated SMS voting server, which can be used in mobile devices that support the Java ME platform and can be remote-controlled via Internet from the Java SE platform application. The final chapter presents the results and conclusions of testing of the created application on real mobile devices.
37

An Analysis of Sustainability in Business: Focused on Understanding Sustainability Indices in the Brazilian Market

Vilaca, Camila S. 21 April 2009 (has links)
No description available.
38

The effect of the 1996 Constitution on section 5 of the Regulation of Gatherings Act 205 of 1993

Van der Walt, Johannes Albertus 11 1900 (has links)
The Regulation of Gatherings Act 205 of 1993 is a old order piece of legislation, but gives full recognition to the right to freedom of assembly and expression. These rights are entrenched in sections 16 and 17 of the Bill of Rights and enjoy a generous interpretation. Section 5 of the Act creates limitations on these rights, as the responsible officer of a local authority is allowed to prohibit a gathering when he has reasonable grounds to believe that the police will not be able to prevent traffic disruption, injury or substantial damage to property. Given the fact that this limitation serves to protect a compelling state interest, it constitutes a reasonable and justifiable limitation in terms of section section 36 of the Bill of Rights. / Law / LL.M.
39

Re-Ranking auf Basis von Bradfordizing für die verteilte Suche in digitalen Bibliotheken

Mayr, Philipp 06 March 2009 (has links)
Trotz großer Dokumentmengen für datenbankübergreifende Literaturrecherchen erwarten akademische Nutzer einen möglichst hohen Anteil an relevanten und qualitativen Dokumenten in den Trefferergebnissen. Insbesondere die Reihenfolge und Struktur der gelisteten Ergebnisse (Ranking) spielt, neben dem direkten Volltextzugriff auf die Dokumente, inzwischen eine entscheidende Rolle beim Design von Suchsystemen. Nutzer erwarten weiterhin flexible Informationssysteme, die es unter anderem zulassen, Einfluss auf das Ranking der Dokumente zu nehmen bzw. alternative Rankingverfahren zu verwenden. In dieser Arbeit werden zwei Mehrwertverfahren für Suchsysteme vorgestellt, die die typischen Probleme bei der Recherche nach wissenschaftlicher Literatur behandeln und damit die Recherchesituation messbar verbessern können. Die beiden Mehrwertdienste semantische Heterogenitätsbehandlung am Beispiel Crosskonkordanzen und Re-Ranking auf Basis von Bradfordizing, die in unterschiedlichen Phasen der Suche zum Einsatz kommen, werden hier ausführlich beschrieben und im empirischen Teil der Arbeit bzgl. der Effektivität für typische fachbezogene Recherchen evaluiert. Vorrangiges Ziel der Promotion ist es, zu untersuchen, ob das hier vorgestellte alternative Re-Rankingverfahren Bradfordizing im Anwendungsbereich bibliographischer Datenbanken zum einen operabel ist und zum anderen voraussichtlich gewinnbringend in Informationssystemen eingesetzt und dem Nutzer angeboten werden kann. Für die Tests wurden Fragestellungen und Daten aus zwei Evaluationsprojekten (CLEF und KoMoHe) verwendet. Die intellektuell bewerteten Dokumente stammen aus insgesamt sieben wissenschaftlichen Fachdatenbanken der Fächer Sozialwissenschaften, Politikwissenschaft, Wirtschaftswissenschaften, Psychologie und Medizin. Die Evaluation der Crosskonkordanzen (insgesamt 82 Fragestellungen) zeigt, dass sich die Retrievalergebnisse signifikant für alle Crosskonkordanzen verbessern; es zeigt sich zudem, dass interdisziplinäre Crosskonkordanzen den stärksten (positiven) Effekt auf die Suchergebnisse haben. Die Evaluation des Re-Ranking nach Bradfordizing (insgesamt 164 Fragestellungen) zeigt, dass die Dokumente der Kernzone (Kernzeitschriften) für die meisten Testreihen eine signifikant höhere Precision als Dokumente der Zone 2 und Zone 3 (Peripheriezeitschriften) ergeben. Sowohl für Zeitschriften als auch für Monographien kann dieser Relevanzvorteil nach Bradfordizing auf einer sehr breiten Basis von Themen und Fragestellungen an zwei unabhängigen Dokumentkorpora empirisch nachgewiesen werden. / In spite of huge document sets for cross-database literature searches, academic users expect a high ratio of relevant and qualitative documents in result sets. It is particularly the order and structure of the listed results (ranking) that play an important role when designing search systems alongside the direct full text access for documents. Users also expect flexible information systems which allow influencing the ranking of documents and application of alternative ranking techniques. This thesis proposes two value-added approaches for search systems which treat typical problems in searching scientific literature and seek to improve the retrieval situation on a measurable level. The two value-added services, semantic treatment of heterogeneity (the example of cross-concordances) and re-ranking on Bradfordizing, which are applied in different search phases, are described in detail and their effectiveness in typical subject-specific searches is evaluated in the empirical part of the thesis. The preeminent goal of the thesis is to study if the proposed, alternative re-ranking approach Bradfordizing is operable in the domain of bibliographic databases, and if the approach is profitable, i.e. serves as a value added, for users in information systems. We used topics and data from two evaluation projects (CLEF and KoMoHe) for the tests. The intellectually assessed documents come from seven academic abstracting and indexing databases representing social science, political science, economics, psychology and medicine. The evaluation of the cross-concordances (82 topics altogether) shows that the retrieval results improve significantly for all cross-concordances, indicating that interdisciplinary cross-concordances have the strongest (positive) effect on the search results. The evaluation of Bradfordizing re-ranking (164 topics altogether) shows that core zone (core journals) documents display significantly higher precision than was seen for documents in zone 2 and zone 3 (periphery journals) for most test series. This post-Bradfordizing relevance advantage can be demonstrated empirically across a very broad basis of topics and two independent document corpora as well for journals and monographs.
40

Linklets - Formal Function Description and Permission Model / Linklets - formale Funktionsbeschreibung und Rechtemodell

Köhler, Marcus 06 February 2012 (has links) (PDF)
Linklets are location-independent web services, which consume and produce Linked Data resources. These resources form a web of data - the semantic web - that is an abstraction of the web 2.0. However, enterprises are reluctant to provide valuable Linked Data resources due to missing financial stimuli. Operations are not representable in the semantic web. Linklets aim to solve both problems. Previous work developed a prototype. The goal of this thesis is to enhance it by a component model, a formal description and a permission model. A business model has to be developed. This thesis follows a bottom-up approach. The formalization of the Linklet concept creates a foundation. Then, an improved architecture and its reference implementation are studied. It is evaluated by tests, show cases and economic considerations. The resulting component system is based on web-service component systems, while a sandbox concept is the core of the permission model. The formal description shows limits of OWLs open world assumption. A platform leader strategy is the foundation for the business model. In conclusion, the advantages of the Linklet concept provide a way to enhance and monetize the value of the semantic web. Further research is required; the practical use has to be considered.

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