To see the other types of publications on this topic, follow the link: WWW model.
Dissertations / Theses on the topic 'WWW model'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'WWW model.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Grešša, Pavol. "Vícedimenzionální přístup k WWW aplikacím." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-236997.
Full textAbstract:
This master's thesis deals with the analysis, design and implementation of authentication and authorization subsystem into the environment of distributed web application. It unifies the well-known security models into the one universal security model that can be used for the development of authorization device enabling the user to secure the applications with various security models. Furthermore, it applies this integration of models into the Takeplace system.
2
Popela, Tomáš. "Implementace algoritmu pro vizuální segmentaci www stránek." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236592.
Full textAbstract:
Segmentation of WWW pages or page division on di erent semantics blocks is one of the disciplines of information extraction. Master's thesis deals with Vision-based Page Segmentation - VIPS method, which consist in division based on visual properties of page's elements. The method is given in context of other prominent segmentation procedures. In this work, the key steps, that this method consist of are shown and described on examples. For VIPS method it is necessary to cooperate with WWW pages rendering engine in order to obtain Document Object Model of page. The paper presents and describes four most important engines for Java programming language. The output of this work is implementation of VIPS algorithm just in Java language with usage of CSSBox core. The original algorithm implementation from Microsoft's labs is presented. The di erent development stages of library implementing VIPS method and my approach to it's solution are described. In the end of this work the work's outcome is demonstrated on several pages segmentation.
3
Archer, Ben. "Http: / developing a computer-mediated model for the teaching of type design history : exegesis submitted to AUT University in partial fulfilment of the Masters degree in Art & Design, August 2007." Click here to access this resource online www.100types.com, 2007. http://www.100types.com.
Full text
4
Ferlic, Flora. "The Growth Corridor a Multi-Perspective Model of Optimum Firm Growth /." kostenfrei, 2008. http://www.biblio.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/3500.
Full text
5
Blöchlinger, Lea. "Power Prices - A Regime-Switching Spot/Forward Price Model with Kim Filter Estimation." kostenfrei, 2008. http://www.biblio.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/3442.
Full text
6
Klusová, Alena. "Model e-marketingu firmy." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2009. http://www.nusl.cz/ntk/nusl-222006.
Full textAbstract:
This thesis focuses on e-marketing. Based on the knowledge from a theoretical part is in a practical part proposed Model of e-marketing which ensure the increasing of image, to higher competitive advantage, also to increase the awareness of the company with customers.
7
Igram, Dale J. "A Topological Explanation of the Urbach Tail." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1459885929.
Full text
8
Laščák, Tomáš. "Algoritmy pro segmentaci webových stránek." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-255360.
Full textAbstract:
Segmentation of web pages is one of the disciplines of information extraction. It allows to divide the page into different semantic blocks. This thesis deals with the segmentation as such and also with the implementation of the segmentation method. In this paper, we describe various examples of methods such as VIPS, DOM PS etc. There is a theoretical description of the chosen method and also the FITLayout Framework, which will be extended by this method. The implementation of the chosen method is also described in detail. The implementation description is focused on describing the different problems we had to solve. We also describe the testing that helped to reveal some weaknesses. The conclusion is a summary of the results and possible ideas for extending this work.
9
Bucknor, Kimberly A. "Elucidating protein behavior on the nanoscale by using synthetic model peptides to investigate the interactions of proteins with single walled carbon nanotubes /." Connect to online version, 2006. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2006/136.pdf.
Full text
10
Bartelstein, Meredith Karlee. "The importance of the innate immune receptor TLR9 in the activation and differentiation of autoreactive transgenic B cells in a murine model of lupus /." Connect to online version, 2008. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2008/261.pdf.
Full text
11
Ebner, Hannes. "Supporting loose forms of collaboration : Using Linked Data to realize an architecture for collective knowledge construction." Doctoral thesis, KTH, Medieteknik och interaktionsdesign, MID, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-144311.
Full textAbstract:
This thesis is driven by the motivation to explore a way of working collaboratively that closely reflects the World Wide Web (WWW), more specifically the potential of the Web architecture built on Semantic Web technologies and Linked Data. The goal is to describe a generic approach and architecture that satisfies the needs for loose collaboration and collective knowledge construction as exemplified by the applications described in this thesis. This thesis focuses on a contribution-centric architecture which allows for flexible applications that support loose forms of collaboration. The first research question deals with how Web-based collective knowledge construction can be supported. The second research question explores the characteristics of collective knowledge construction with respect to the Open World Assumption (OWA). The OWA implies that complete knowledge about a subject cannot be assumed at any time, which is one of the most fundamental properties of the WWW. The third research question investigates how Semantic Web technologies be used in order to support such a contribution-centric architecture. The thesis and its underlying publications are of a technical character and are always grounded in theoretical models and considerations that have led to functional implementations. The research has evolved in iterative development processes and was explicitly directed at building applications that can be used in collaborative settings and that are based on standardized Web technologies. One of the main outcomes, an information model, was developed together with such an application and provides a number of novel approaches in the context in which it was designed. The validity of the presented research is supported by evaluations from different perspectives: a list of implemented applications and showcases, results from structured interviews that have investigated the suitability for various resource annotation processes, as well as scalability aspects. The thesis concludes that it is ultimately up to the application how "loose" the collaboration should be and to which extent the OWA is incorporated. The presented architecture provides a toolkit to support the development of loosely collaborative applications. The showcased applications allow the construction of collaborative conceptual models and to collaboratively annotate educational resources. They show the potential of the used technology stack and the introduced contribution-centric architecture that sits on top if it.QC 20140417
12
Trezzi, Michael. "Řešení DEA modelů v prostředí WWW." Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-1629.
Full textAbstract:
Diplomová práce je věnována vytvořené aplikaci DEAMS. DEAMS je webová aplikace pro řešení úloh modelů analýzy obalu dat a vyznačuje se uživatelskou přívětivostí, použitelností a jednoduchou prezentací a interpretací výsledků.
13
Limbu, Dilip Kumar. "Contextual information retrieval from the WWW." Click here to access this resource online, 2008. http://hdl.handle.net/10292/450.
Full textAbstract:
Contextual information retrieval (CIR) is a critical technique for today’s search engines in terms of facilitating queries and returning relevant information. Despite its importance, little progress has been made in its application, due to the difficulty of capturing and representing contextual information about users. This thesis details the development and evaluation of the contextual SERL search, designed to tackle some of the challenges associated with CIR from the World Wide Web. The contextual SERL search utilises a rich contextual model that exploits implicit and explicit data to modify queries to more accurately reflect the user’s interests as well as to continually build the user’s contextual profile and a shared contextual knowledge base. These profiles are used to filter results from a standard search engine to improve the relevance of the pages displayed to the user. The contextual SERL search has been tested in an observational study that has captured both qualitative and quantitative data about the ability of the framework to improve the user’s web search experience. A total of 30 subjects, with different levels of search experience, participated in the observational study experiment. The results demonstrate that when the contextual profile and the shared contextual knowledge base are used, the contextual SERL search improves search effectiveness, efficiency and subjective satisfaction. The effectiveness improves as subjects have actually entered fewer queries to reach the target information in comparison to the contemporary search engine. In the case of a particularly complex search task, the efficiency improves as subjects have browsed fewer hits, visited fewer URLs, made fewer clicks and have taken less time to reach the target information when compared to the contemporary search engine. Finally, subjects have expressed a higher degree of satisfaction on the quality of contextual support when using the shared contextual knowledge base in comparison to using their contextual profile. These results suggest that integration of a user’s contextual factors and information seeking behaviours are very important for successful development of the CIR framework. It is believed that this framework and other similar projects will help provide the basis for the next generation of contextual information retrieval from the Web.
14
Prudík, Jiří. "Model metropolitní optické sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217666.
Full textAbstract:
The purpose of this master’s thesis is foremost to provide a simple guide how to build elements of optical metropolitan area network. The basic model consists to sequence of construction, network topology, passive and active parts. The collection contains examples of alternative technology such as Wireless LAN with different frequency. The optical network construction based on optical cable, fibres, splices, trays, adapters, connectors and active parts for example a lot of media convertor models. After that there are demonstrating type of wavelength division multiplexer used in metropolitan area network – passive planar PCL splitter. One of the passive planar splitter are used to increase optical fibre channel. At the end of the collection a simplified examples of used measurements – optical time domain reflectometry and optical fibre transmission. Contains standard protocols or reflectogram. The conclusion of this thesis summarizes costs of FTTb (Fibre To The Building) model of optical metropolitan area network in Czech republic and future contribution for society.
15
Zdráhal, Lukáš. "Zpracování 3D modelů scény." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235963.
Full textAbstract:
Purpose of this document is acquite reader with basic principles of 3D model digitalization.This work describes general overview of 3D scanning devices, their physical principle and measurements methods. Next part of this document describes basic method for polygonal mesh processing as smoothing an decimation which are necessary for 3D model processing.This document contains also algorithms description of implementation, user interface and publication part through WWW. Fundamental essence of this diploma thesis will be introduction with general principles of 3D scanning and working with Minolta VIVID-700 3D digitizer which is placed on our faculty. At the end are mentioned results evalution,demostration examples and next supposed project advancement.
16
Vargas, Douglas Nazareno Debiazi. "Uma ferramenta para gerência de redes ATM, via WWW, Java e SNMP." Florianópolis, SC, 2001. http://repositorio.ufsc.br/xmlui/handle/123456789/82172.
Full textAbstract:
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Computação.Made available in DSpace on 2012-10-19T12:22:56Z (GMT). No. of bitstreams: 0Bitstream added on 2014-09-25T23:41:26Z : No. of bitstreams: 1 181749.pdf: 5095230 bytes, checksum: 2c744b9b774a31f3589b84b949163234 (MD5)
Este trabalho descreve estudos realizados sobre: as redes ATM, a gerência dessas redes com uso de SNMP e da internet, com maior atenção ao ambiente WWW e à linguagem Java. Estas tecnologias servem como base para o desenvolvimento de uma ferramenta de gerência de redes ATM, a ferramenta SIGMA/WS, com a qual foram realizados experimentos no ambiente de rede ATM da UFSC. A SIGMA/WS foi desenvolvida tendo como base a linguagem HTML e a linguagem Java, através das quais, estabelece-se uma comunicação via SNMP com os equipamentos de rede gerenciados. Para fazer funcionar a ferramenta SIGMA/WS faz-se necessário dispor de um cliente Web instalado em um computador conectado à Internet. A ferramenta SIGMA/WS foi empregada em um ambiente de teste para monitorar um switch ATM da rede UFSC. Nesse ambiente, foi monitorado o tráfego dos enlaces conectados a esse switch, obtendo-se gráficos que apresentam informações sobre a configuração switch. Através desses gráficos pode-se analisar o comportamento da rede, verificando os enlaces com gargalo e horários de pique. Como resultado global, este trabalho mostra o uso do ambiente Web para a monitoração de aspectos de desempenho, de configuração e falhas a redes ATM, com o uso do SNMP, graças ao emprego de um ferramenta desenvolvida com as linguagens HTML e Java.
17
Boenner, Alexander Bönner Alexander. "Forecasting Models for the German Office Market." [S.l.] : [s.n.], 2009. http://www.unisg.ch/www/edis.nsf/SysLkpByIdentifier/3561.
Full text
18
Boehnke, Jasper. "Business models for Micro CHP in residential buildings." kostenfrei, 2007. http://www.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/3375.
Full text
19
Sarisaman, Mustafa. "Target Space Pseudoduality in Supersymmetric Sigma Models on Symmetric Spaces." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/357.
Full textAbstract:
We discuss the target space pseudoduality in supersymmetric sigma models on symmetric spaces. We first consider the case where sigma models based on real compact connected Lie groups of the same dimensionality and give examples using three dimensional models on target spaces. We show explicit construction of nonlocal conserved currents on the pseudodual manifold. We then switch the Lie group valued pseudoduality equations to Lie algebra valued ones, which leads to an infinite number of pseudoduality equations. We obtain an infinite number of conserved currents on the tangent bundle of the pseudodual manifold. Since pseudoduality imposes the condition that sigma models pseudodual to each other are based on symmetric spaces with opposite curvatures (i.e. dual symmetric spaces), we investigate pseudoduality transformation on the symmetric space sigma models in the third chapter. We see that there can be mixing of decomposed spaces with each other, which leads to mixings of the following expressions. We obtain the pseudodual conserved currents which are viewed as the orthonormal frame on the pullback bundle of the tangent space of G tilde which is the Lie group on which the pseudodual model based. Hence we obtain the mixing forms of curvature relations and one loop renormalization group beta function by means of these currents. In chapter four, we generalize the classical construction of pseudoduality transformation to supersymmetric case. We perform this both by component expansion method on manifold M and by orthonormal coframe method on manifold SO(M). The component method produces the result that pseudoduality tranformation is not invertible at all points and occurs from all points on one manifold to only one point where riemann normal coordinates valid on the second manifold. Torsion of the sigma model on M must vanish while it is nonvanishing on M tilde, and curvatures of the manifolds must be constant and the same because of anticommuting grassmann numbers. We obtain the similar results with the classical case in orthonormal coframe method. In case of super WZW sigma models pseudoduality equations result in three different pseudoduality conditions; flat space, chiral and antichiral pseudoduality. Finally we study the pseudoduality tansformations on symmetric spaces using two different methods again. These two methods yield similar results to the classical cases with the exception that commuting bracket relations in classical case turns out to be anticommuting ones because of the appearance of grassmann numbers. It is understood that constraint relations in case of non-mixing pseudoduality are the remnants of mixing pseudoduality. Once mixing terms are included in the pseudoduality the constraint relations disappear.
20
Wiehler, Stephan. "Microeconometric evaluation of labor market policies using administrative data." lizenzfrei, 2007. http://www.biblio.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/3439.
Full text
21
Panvel, Jal. "Exact string backgrounds and gauged WZW models." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241464.
Full text
22
Lima, Cristiano Cachapuz e. "ORPIS: um modelo de consistência de conteúdo replicado em servidores Web distribuídos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2003. http://hdl.handle.net/10183/2694.
Full textAbstract:
O surgimento de novas aplicações que utilizam o protocolo HTTP nas suas transações e a crescente popularidade da World Wide Web (WWW) provocaram pesquisas pelo aumento do desempenho de servidores Web. Para tal, uma das alternativas propostas neste trabalho é utilizar um conjunto de servidores Web distribuídos que espalham a carga de requisições entre vários computadores, atuando como um só associado a uma estratégia de replicação de conteúdo. Um dos problemas centrais a ser resolvido em servidores Web distribuídos é como manter a consistência das réplicas de conteúdo entre os equipamentos envolvidos. Esta dissertação apresenta conceitos fundamentais envolvendo o tema replicação de conteúdo em servidores Web distribuídos. São mostrados detalhes sobre arquitetura de servidores Web distribuídos, manutenção da consistência em ambientes de servidores Web distribuídos, uso de replicação e formas de replicação. Além disso, são citados alguns trabalhos correlatos ao propósito de manter réplicas consistentes em ambientes de servidores Web distribuídos. Este trabalho tem por objetivo propor um modelo de manutenção da consistência de conteúdo em servidores Web distribuídos com características de transparência e autonomia. O modelo, denominado One Replication Protocol for Internet Servers (ORPIS), adota uma estratégia de propagação otimista porque não existe sincronismo no envio das atualizações para as réplicas. Este trabalho apresenta os principais componentes tecnológicos empregados na Web, além dos problemas causados pela escalabilidade e distribuição inerentes a esse ambiente. São descritas as principais técnicas de aumento de desempenho de servidores Web que atualmente vêm sendo utilizadas. O modelo ORPIS é descrito, sendo apresentados seus pressupostos, elencados seus componentes e detalhados os seus algoritmos de funcionamento. Este trabalho dá uma visão geral sobre a implementação e os testes realizados em alguns módulos do protótipo do modelo, caracterizando o ambiente de desenvolvimento do protótipo e detalhes da implementação. São enumerados os atributos e métodos das classes do protótipo e definidas as estruturas de dados utilizadas. Além disso, apresentam-se os resultados obtidos da avaliação funcional dos módulos implementados no protótipo. Um ponto a ser salientado é a compatibilidade do modelo ORPIS aos servidores Web existentes, sem a necessidade de modificação em suas configurações. O modelo ORPIS é baseado na filosofia de código aberto. Durante o desenvolvimento do protótipo, o uso de software de código aberto proporcionou um rápido acesso às ferramentas necessárias (sistema operacional, linguagens e gerenciador de banco de dados), com possibilidade de alteração nos códigos fonte como uma alternativa de customização.
23
Flammer, Caroline. "The financing of education in developing countries : models of sustainable educational contracts." kostenfrei, 2009. http://www.biblio.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/3564.
Full text
24
Wenner, Fabian. "Determination of risk aversion and moment-preferences a comparison of econometric models /." [S.l.] : [s.n.], 2002. http://www.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/2606.
Full text
25
Kohler, Daniel. "Betting against uncovered interest rate parity." kostenfrei, 2008. http://www.biblio.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/3513.
Full text
26
Nötzli, Breinlinger Ursula Gabriela. "Situative Corporate Governance : ein Modell für kleine und mittelgrosse Familienunternehmen in der Schweiz." [S.l.], 2006. http://www.biblio.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/3275.
Full text
27
Ferro, Dennis Eduardo Zavaleta [UNESP]. "Some geometric aspects of non-linear sigma models." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/151647.
Full textAbstract:
Submitted by DENNIS EDUARDO ZAVALETA FERRO (dennis.ttf@gmail.com) on 2017-09-18T13:53:32Z
No. of bitstreams: 1
msc-thesis.pdf: 505892 bytes, checksum: c724040eff49813a08ac27d82fce286b (MD5)Approved for entry into archive by Monique Sasaki (sayumi_sasaki@hotmail.com) on 2017-09-19T19:20:32Z (GMT) No. of bitstreams: 1 ferro_dez_me_ift.pdf: 505892 bytes, checksum: c724040eff49813a08ac27d82fce286b (MD5)
Made available in DSpace on 2017-09-19T19:20:32Z (GMT). No. of bitstreams: 1 ferro_dez_me_ift.pdf: 505892 bytes, checksum: c724040eff49813a08ac27d82fce286b (MD5) Previous issue date: 2016-08-15
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
We review some relevant examples for String Theory of non-linear sigma models. These are bosonic strings propagating in curved background, the Wess-Zumino-Witten model and superstrings in flat and AdS superspace. The mathematical tools required for the study of these models (e.g. topological quantization, Cartan geometry, Lie superalgebras and geometry on coset spaces) are also described. Throughout the dissertation we have focused on classical aspects of these models such as the construction of the action and its symmetries where conditions for holomorphic symmetry of the bosonic string case were found.
Nesta dissertação estudamos alguns exemplos de modelos sigma não lineares em Teoria de cordas. Estes são a corda bosónica se propagando em espaços curvos, o modelo Wess-Zumino-Witten e supercordas em superespaço plano e AdS. As ferramentas matemáticas que se precisam para o estudo destes modelos (e.g. quantização topológica, geometria de Cartan, super-álgebras de Lie e geometria em espaços coset) também são descritas. Ao longo desta dissertação focamos os aspectos clássicos destes modelos tais como a construção da ação e suas simetrias onde condições para serem estas holomorficas no caso da corda bosónica foram achadas.
28
NASCIMENTO, Rogério Patrício Chagas do. "Modelo de serviço de vídeo baseado em CORBA para suportar um ambiente www de educação à distancia." Universidade Federal de Pernambuco, 1999. https://repositorio.ufpe.br/handle/123456789/2555.
Full textAbstract:
Made available in DSpace on 2014-06-12T15:59:13Z (GMT). No. of bitstreams: 2
arquivo4979_1.pdf: 1703988 bytes, checksum: d8654c769dfe4ae2d6b6f54b2fec0734 (MD5)
license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5)
Previous issue date: 1999A sinergia entre a Internet e a Multimídia promete novas metáforas e paradigmas nos campos da propaganda, comunicação, comércio e treinamento. Nosso interesse em particular é verificar essa influência para o desenvolvimento de um ambiente computacional de suporte a aplicações multimídia de Educação a Distância, utilizando a World Wide Web. Em particular, um serviço de vídeo baseado no padrão CORBA (Common Object Request Broker Architecture), middleware para suporte a aplicações distribuídas. Como aplicações multimídia podem ser distribuídas pela Web e suportadas por CORBA? Respondemos a essa e outras questões quando descrevemos os principais protocolos de comunicação e apresentamos as tecnologias subjacentes a uma aplicação de educação a distância distribuída pela Web. Apresentamos conceitos de middleware, APIs e serviços de vídeo para melhor entendermos a nova tendência no paradigma da programação orientada a objetos: os objetos distribuídos. Relatamos os principais padrões emergentes para o efetivo uso de aplicações baseadas em objetos distribuídos: Java RMI, EJB, DCOM e CORBA. Primeiro mostramos a relação entre CORBA e a Web descrevendo o protocolo IIOP e sua função. Descrevemos os protocolos RTP, RTCP, RTSP e RSVP como alternativas à distribuição de conteúdo multimídia em aplicações de tempo real. E discutimos o projeto Internet2 como catalisador de novas aplicações denominadas "avançadas" abordando duas tecnologias emergentes: o protocolo IPng e a tecnologia ATM. Abordaremos os dois principais paradigmas para a transmissão de vídeo: Vídeo sob Demanda (VoD Video on Demand), usado em sistemas de TV a cabo e em bibliotecas digitais virtuais; e Videoconferência, usada em encontros organizacionais, tele-audiências judiciais, aplicações de telemedicina e Educação a Distância (EAD), baseadas na Web ou não. Detalhamos os principais modelos de Videoconferência, quais são: Videoconferência em Grupo (Room Videoconferencing) e Videoconferência Pessoal (Desktop Videoconferencing). Outro aspecto importante na transmissão de vídeo é a forma de transmissão de vídeo em uma rede de computadores. Analisamos as transmissões Unicast, Multicast e Broadcast mostrando as aplicações mais usuais na Web. Destacamos a necessidade de uma plataforma distribuída mostrando por que a flexibilidade, escalabilidade e abertura são características desejáveis para uma solução efetivamente distribuída. E mostramos a distribuição como uma questão que ainda precisa ser resolvida. Fazemos uma análise do estado da arte mostrando algumas falhas. Explicamos por que é mais apropriada a videoconferência pessoal para as aplicações de educação a distância baseadas na Internet, relatando as vantagens e desvantagens da videoconferência pessoal e em grupo. Definimos o escopo dos recursos e funcionalidades que uma aplicação de videoconferência pessoal distribuída deverá prover associando essas características a um cenário "desejável" para uma aplicação de educação a distância. O nosso trabalho define a arquitetura e modelo de um serviço de vídeo aberto, suportado por CORBA, voltado para aplicações de educação a distância. O modelo descrito integra a semântica do cenário apresentado, os módulos e as interfaces necessárias ao estabelecimento e controle do fluxo (stream) de vídeo. Mostramos a arquitetura do serviço de vídeo proposto e sua relação com aplicações multimídia para a educação a distância que utilizem vídeo sob demanda e videoconferência pessoal pela Web. Por fim, contribuímos com indicações para o projeto do serviço de vídeo proposto nesta dissertação
29
Ferro, Dennis Eduardo Zavaleta. "Some geometric aspects of non-linear sigma models /." São Paulo, 2016. http://hdl.handle.net/11449/151647.
Full textAbstract:
Orientador: Andrei MikhailovResumo: We review some relevant examples for String Theory of non-linear sigma models. These are bosonic strings propagating in curved background, the Wess-Zumino-Witten model and superstrings in flat and AdS superspace. The mathematical tools required for the study of these models (e.g. topological quantization, Cartan geometry, Lie superalgebras and geometry on coset spaces) are also described. Throughout the dissertation we have focused on classical aspects of these models such as the construction of the action and its symmetries where conditions for holomorphic symmetry of the bosonic string case were found.
Mestre
30
Leiva, Willie Dresler. "Um modelo de hipertexto para apoio ao ensino mediado pela Web." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-17112003-071043/.
Full textAbstract:
Atualmente há uma demanda crescente por aplicações hipermídia baseadas na WWW (World Wide Web), conhecidas como WIS (Web Information Systems). Esse novo tipo de aplicação apresenta requisitos adicionais aos sistemas de software clássicos, o que resulta na necessidade de investigar modelos mais adequados para apoiar o seu desenvolvimento. Em especial, os sistemas para apoio ao EaD (Ensino a Distância) baseados na Web apresentam características e requisitos ainda mais específicos. Os modelos atuais para modelagem e especificação de hiperdocumentos não são completamente adequados para representar características deste domínio, como a necessidade de acompanhamento dos aprendizes e a realização de avaliações diagnósticas e formativas. Isso motivou a proposta de um modelo para apoiar WISs voltados especificamente para EaD, denominado MDE (Modelo para Documentos Educacionais), que estende o modelo HMBS (Hyperdocument Model Based on Statecharts) para a descrição de conteúdo nesse domínio. O MDE adota como modelo formal subjacente uma variante da técnica Statecharts, cuja estrutura e semântica operacional possibilitam especificar a estrutura organizacional e a semântica navegacional de hiperdocumentos complexos. Adicionalmente, foi integrada ao MDE a técnica de mapeamento conceitual, que acrescenta um significado educacional aos grafos hierárquicos. Dessa forma, o modelo apresenta como pontos fortes a possibilidade de captar várias informações relevantes do comportamento do usuário no estudo do material disponível on-line e a disponibilização desses dados ao instrutor, como importante apoio à avaliação formativa. Como prova de conceito, foi desenvolvido o protótipo de um ambiente para autoria e oferecimento de cursos denominado ATEnA (Ambiente para Treinamento, Ensino e Aprendizagem). Esta tese apresenta também avaliações conceituais e práticas do modelo e do protótipo desenvolvidos.There is an increasing demand for hypermedia applications based on the WWW (World Wide Web), known as Web Information Systems (WIS). These applications present specific requirements in addition to those of traditional software systems, thus fostering the need for investigating suitable models to support their development. In particular, systems for Distance Education based on the Web present very specific characteristics and requirements. Current models for hyperdocument modeling and specification are not completely suitable for representing domain specific characteristics such as the need of tracking student progress and evaluating their learning process through diagnostic and formative assessments. This scenario motivated the proposal of a model to support WISs targeted at distance education, called MDE (Model for Distance Education). MDE extends the HMBS (Hyperdocument Model Based on Statecharts) hyperdocument model to describe hypertext content in the educational domain. It adopts as its underlying model a variant of the Statecharts formal specification technique, whose organizational structure and operational semantics allows defining the organizational structure and navigational semantics of complex hyperdocuments. MDE also incorporates the technique of conceptual mapping, that adds educational meaning to hierarchical graphs. MDEs major strengths are thus the ability to capture relevant information about user behavior when studying on-line educational material and make such information available to the teacher / instructor in order to support formative assessment of students. As a proof of concept, the prototype of an environment for authoring and offering distance courses based on MDE has been developed, called ATEnA (Adaptive Training Environment with Support for Assessment). The results of practical and conceptual evaluations of the model and system developed are also presented in this thesis.
31
Ghosh, Rhea. "On intersecting 2-brane solutions in Type IIA supergravity theory /." Connect to online version, 2005. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2005/123.pdf.
Full text
32
Petkova, Desislava I. "Cluster-based relevance models for automatic image annotation /." Connect to online version, 2005. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2005/124.pdf.
Full text
33
Wilkinson, Peter J. "Development of an in vitro model to investigate repeat ocular exposure." Thesis, University of Nottingham, 2006. http://eprints.nottingham.ac.uk/30561/.
Full textAbstract:
The Draize eye irritation test has been widely adopted as the "gold standard" to evaluate the potential eye irritation of a wide range of chemicals and formulations, including; pharmaceuticals, cosmetics, and their raw ingredients. The rationale for pursuing the development of human ocular based in vitro alternatives is to provide greater confidence in the prediction of human reactions to mild and moderate chemicals. This is particularly important with the implementation of the EC White Paper, "Strategy for a future chemicals policy" (2001) that is estimated to require the testing of approximately 30,000 'existing' chemicals by 2012. The development of in vitro alternatives for toxicity testing has mainly focused upon tests for quantitative measurement of acute toxicity following a single high-dose exposure. However, the degree of toxicity of any exposure is a function of; the dose which target cells receive, the duration of the exposure and the ability of the exposed cells to recover from the exposure. However, little account is taken of the potential role of long-term effects in modulating the toxic response. This study aims to generate an in vitro model utilizing a human corneal cell line monolayer to investigate the effects chronic exposure to exogenous chemicals has upon toxicity of a subsequent acute challenge. Surfactants are ubiquitous within our daily environment, being significant active components in both household and personal care products, cosmetics and pharmaceuticals. Initially the effects of four representative surfactants (sodium dodecyl sulphate; anionic, tween 20; non-ionic, cocamidopropylbetaine; amphoteric and benzalkonium chloride; cationic) were examined following chronic exposure. Although the measured endpoints (neutral red uptake, resazurin reduction, fluorescein leakage and total protein content) revealed no alterations in J-HCET morphology, barrier function or biochemistry as a consequence of chronic exposure, it was determined that pre-exposure modulated the toxicity of subsequent acute exposures. The observed modulation in toxicity could have significant health implications for personal care products, cosmetics and pharmaceuticals intended for use near or within the eye. However, the mechanism(s) by which the toxicity of subsequent surfactant exposures was modulated remains to be elucidated. Whilst standard surfactants are good indicators of the effects following chronic exposure, there are pharmaceuticals designed for repeat use in the eye that have been associated with long term ocular irritancy, and a discontinuation of use i.e. timolol maleate. J-HCET cultures exposed to BSO in vitro confirm that the toxicity of timolol to the human corneal cells line was enhanced by suppressing the activity of γ-glutamylcysteine synthetase through irreversible inhibition, resulting in a decrease in intracellular glutathione (GSH) levels. In addition, chronic exposures to timolol maleate were also associated with an increase in toxicity of subsequent acute challenges. The long term use of Timolol maleate in the treatment of glaucoma in vivo may result in similar alterations in the intracellular GSH concentrations, resulting in discontinuation of treatment as consequence of ocular irritation through the generation of reactive oxidation species beyond the threshold that depleted intracellular GSH can respond. Since in vitro methods have been, and are being developed as alternatives to animal experiments, the use of bovine serum as a source of growth factors can seem to be contradictory to the purposes of the Three R's concept of Russell and Burch (1959). This study was conducted using culture media that contain animal derived growth supplements and a media where these had been substituted for plant derived materials. Comparisons were made between the effects these two supplements had upon a number of biological factors including morphology, biochemistry, barrier function and the response to exogenous chemicals. No alterations were observed in these parameters as a consequence of using culture medium containing plant derived materials compared to those containing animal derived growth supplements. This study has demonstrated that the development of a reliable and reproducible in vitro assay in keeping with the principles of the Three R's for modeling chronic – repeat ocular irritation is possible. However, the mechanistic relevance of the endpoints chosen and cell layer ultrastructure is considered to be an essential component. The further development of cell based in vitro systems to predict human responses to chronic/repeat ocular irritation is required.
34
Wockatz, Philip. ""WOW. FOR VOLVO" : cognition and affect combining forces to measure the immeasurable." Thesis, Linköping University, Department of Computer and Information Science, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-20990.
Full text
35
Pham, Tien Duc, and n/a. "A new approach to regional modelling: an Integrated Regional Equation System (IRES)." Griffith University. School of International Business and Asian Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20041022.083520.
Full textAbstract:
This thesis develops a new structure that explicitly combines two CGE models, a national and a regional, in an integrated structure that gives the thesis model the name IRES, in short for the Integrated Regional Equation System. The typical features of the integrated structure are the adding-up conditions and the two-way linkages between the national and the regional modules facilitated by the interface shifters. The adding-up conditions ensure the two modules produce consistent results and updated databases. The inclusion of the interface shifters on the one hand plays a role in ensuring compatibility of results of the two modules, i.e. no distortion occurs because technical or taste changes are transferred across modules. On the other hand, the interface shifters assist the operation of IRES in different modes: the model can be used as a top-down model, a bottom-up model or an integrated model where national and regional shocks can be introduced at the same time. Hence, IRES has more flexibility in its application than a regional model or a national model alone, as IRES can make use of availability of data at any levels in the economy. IRES has a new labour market in which regional migration is no longer the only factor that settles the labour market as in the original setting of the MMRF model. Regional unemployment and regional participation rates are modelled to response to changes in regional employment growth using elasticities estimated econometrically in this thesis. IRES implements historical patterns of regional migration so that results of regional migration are consistent with observed patterns. Altogether, regional migration, regional unemployment and participation rates determine the equilibrium of the labour market. IRES adopts new approaches to modelling margin demands and indirect taxes. These new approaches are very effective in reducing the size of IRES but they do not compromise the use of the model. These approaches are readily applicable to any other regional CGE models.
36
Colley, Linda Katurah, and n/a. "Myth, Monolith or Normative Model? Evolution of the Career Service Model of Employment in the Queensland Public Service 1859-2000." Griffith University. Department of Industrial Relations, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050602.120554.
Full textAbstract:
Public services play an essential role in society, and every citizen uses them. They have traditionally been the principal means of implementing the political will, through policy development and implementation. Yet it is almost a national sport to criticise public servants. Their image is often poor, fed by television programmes such as Yes Minister. Common perceptions include that they have little real merit, do not work hard, are under little pressure to perform, are too powerful, are almost impossible to dismiss, and could benefit from some private sector experience. Such are the consequences of the career service model of employment that public servants enjoy. This thesis considers the much-maligned career service model of public sector employment relations, and asks how important it was, how it evolved, and why. First, it outlines the traditional understanding of public service employment, with its central tenets of merit, tenure, standardised conditions and political neutrality, all administered by an independent central personnel agency, and then explores the adoption, adaptation and reform of that model in three major western democracies - Britain, the United States and Australia. Then, it considers the implementation and evolution of that model in the Queensland public service from 1859 to 2000. The thesis argues that the traditional career service model was necessary to overcome problems of politicisation, corruption, insecurity and inefficiency that arose from the previous patronage model in the early 1800s. The model contained sound principles that were largely consistent with Westminster conventions, and were considered necessary for effective service in a political environment. Poor implementation of the model led to growing dissatisfaction by the late 20th century. However, rather than diagnose the problem as poor implementation and perhaps inadequate political leadership of the service, the career service model itself was found deficient, and was subjected to extensive reform through the weakening of its central tenets. The evolution of the career service demonstrates some circularity, as the problems of politicisation and insecurity that existed prior to the career service model begin to re-emerge.
37
Blain, Peter J., and N/A. "A Computer Model of Creativity Based on Perceptual Activity Theory." Griffith University. School of Information and Communication Technology, 2007. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070823.171325.
Full textAbstract:
Perception and mental imagery are often thought of as processes that generate internal representations, but proponents of perceptual activity theory say they are better thought of as guided exploratory activities. The omission of internal representations in the perceptual activity account has led some to see it as computationally implausible. This thesis clarifies perceptual activity theory from a computational perspective, and tests its viability using a computer model called PABLO. The computer model operates in the Letter Spirit domain, which is a framework for creating stylistic variations on the lowercase letters of the Roman alphabet. PABLO is unlike other computer models of perception and mental imagery because it does not use data-structures to represent percepts and mental images. Mental contents are instead modelled in terms of the exploratory activity in which perceptual activity theory says they consist. PABLO also models the flexibility of imagery, and simulates how it can be harnessed and exploited by the system to generate a creative product. PABLO is a first attempt at an implementation of perceptual activity theory, but the results suggest that the theory is computationally viable, and that it has advantages over other theories of mental imagery in the context of creativity.
38
Hairsine, Peter Brian, and n/a. "A Physically Based Model of the Erosion of Cohesive Soils." Griffith University. Division of Australian Environmental Studies, 1988. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050826.114613.
Full textAbstract:
A new model of the erosion by water of cohesive soils is developed using physical principles. The theoretical framework which is developed recognises the changing nature of the eroding surface of a soil. Raindrop impact and overland flow are considered to act upon a soil surface so removing soil from the cohesive original (or parent) soil. Once this soil enters the overland flow, either as aggregates or primary particles, it is considered to return to the soil bed, from which it may be re-removed. The development of a deposited layer makes it necessary to distinguish between processes removing sediment from the original soil and those processes removing the deposited layer. This layer, being formed by the relatively gentle action of deposition during the current erosion event, is presumed cohesionless. The physical properties of the original soil and the deposited layer are considered to be very different. The development of two experimental apparatus, a rainfall/runoff simulator and a settling tube for the measurement of aggregate settling velocities, is first described. Experimental investigations, using these apparatus, and field observations to inform the description of the erosion and deposition processes, are then presented. The processes by which rainfall impact removes sediment from the original soil and the deposited layer are termed rainfall detachment and rainfall re-detachment respectively. Initially, descriptions of these processes in the presence of deposition, are combined in a model describing net rainfall detachment when removal of sediment from the flow bed by overland flow is not occurring. The developriient of the deposited layer is considered both quantitatively and qualitatively. The solution of the equation describing mass conservation is then given for the equilibrium situation when the mass of the deposited layer, and therefore the sediment concentration, is constant with respect to time. The processes by which overland flow removes sediment from the original soil and the deposited layer are termed entrainment and re-entrainment. The work done by the process of entrainment is considered to be done wholly against the cohesive strength of the original soil. In contrast to the process of entrainment, the work done in re-entraining sediment from the deposited layer is considered only to be done against gravity. The resulting description of these processes is then combined with the previous descriptions of rainfall detachment, rainfall re-detachment and deposition and with the equation describing the conservation of mass of sediment within any arbitary number of size (or settling velocity) classes. A plane geometry model Is developed in which the surface water flow is considered to be uniformily distributed across a plane slope on which all processes act. When the mass of the deposited layer is steady, two possible forms of equilibrium are shown to exist. When the coverage of the original soil by deposited layer is partial, the sediment concentration is limited by the removal of the cohesive original soil by entrainment and rainfall detachment, in the presence of deposition. This situation is termed 'source limiting' and is shown to provide a lower limit to sediment concentration. When the coverage of the deposited layer is complete so that entrainment and rainfall detachment of the original soil are considered not to occur, then the ability of the erosive agents to re-entrain and re-detach sediment in the presence of deposition limits sediment concentration. This situation, termed 'transport limiting', is shown to provide a practical upper limit to sediment concentration. This plane geometry flow model is followed by a revised model in which all processes are considered to occur but the flow of water on a plane surface is modified by the formation of rills. In this 'detailed geometry model' the spatial distribution of the erosive agents is shown to have a marked influence on the resulting processes and sediment concentrations. A potential description of the sediment transport across a change in land slope is also developed. Finally, a discussion of this new modelling approach is presented in which the conceptual developments of this thesis are considered and future developments are suggested. This discussion also includes a comparison of the outcomes of this new work with similar erosion models.
39
Wilkins, Hugh Charles, and n/a. "A Structural Model of Satisfaction and Brand Attitude in Hotels." Griffith University. Griffith Business School, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20061023.160143.
Full textAbstract:
This thesis is about the customer experience in hotels. The thesis evaluates the customer experience in relation to the antecedents of behavioural loyalty. Behavioural loyalty is evaluated in relation to customer satisfaction, brand trust and brand attitude. Customer satisfaction is also evaluated in relation to the antecedents of hotel performance, service quality and perceived value. The broad research underpinning this research is: How do consumers perceive and relate to luxury and first class hotel brands? The hotel industry is a large and highly diverse industry that includes a wide range of property styles, uses and qualities (Chon & Sparrowe, 2000; Go & Pine, 1995; Olsen, 1996; Powers & Barrows, 1999). The industry covers the spectrum of small, medium and large enterprises (Brotherton, 2003; Jones, 2002) and makes a significant contribution to national and international economies. The research incorporated data collection in three stages. The first stage was a qualitative study of consumers who self selected as first class or luxury consumers. The data from the focus groups were used to develop items for inclusion in a survey instrument. The focus groups data, together with information gathered from a literature review, were used to develop scales across a number of hotel performance dimensions. In addition scales were included in the survey instrument on customer satisfaction, perceived value, brand trust, brand attitude and behavioural loyalty. The second stage of the research was a pilot study with the survey instrument being distributed to a convenience sample. The data collected at this stage were used to purify and refine the survey instrument. The final stage was data collected from consumers in a number of Australian hotels. The resultant data set comprised 693 completed and useable responses. The data were examined using exploratory and confirmatory factor analyses to confirm the hotel performance and other dimensions. The resultant dimensions showed good psychometric properties. A number of hypotheses were proposed in the thesis and examined using structural equation modelling. Although two hypotheses were rejected the resultant structural model showed strong relationships between the dimensions included. The research identified that service quality is a strong contributor to behavioural loyalty. The stronger pathway from service quality to behavioural loyalty was through customer satisfaction ( = 0.63) although the pathway through brand attitude ( = 0.22) was also significant. Both customer satisfaction and service quality had a significant effect on brand trust and service quality also influenced brand attitude. A number of recommendations for further research were made. These included the replication of this study in different geographic and industry contexts.
40
Stevens, Roger P., and n/a. "A Computer Model of the Cellular Slime Mould Dictyostelium Discoideum." Griffith University. School of Computing and Information Technology, 2002. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050906.112225.
Full textAbstract:
Excitable media are an important class of systems, examples of which include epidemics, predator-prey interactions, nervous systems, and heart muscle. Aggregating cellular slime moulds are an example of an excitable medium. The species of cellular slime mould Dictyostelium discoideum is an important model organism that many science laboratories use. Studying the aggregation of slime moulds increases knowledge about excitable media generally. One method of studying the aggregation of slime mould is to simulate theft behaviour on a computer model. This thesis presents the author's computer model of cellular slime mould Dictyostelium discoideum and the results of experiments carried out using the computer model. The experiments investigate the relation between the aggregation patterns and the various parameters of the model. These parameters are the density of artificial slime moulds, the acrasin threshold, the acrasin degradation rate, and the rate of acrasin secretion. Randomness has an effect on the aggregation patterns produced. Results of experiments are presented that examine the effect of randomness. Two forms of randomness are investigated: random secretion of acrasin by the artificial slime moulds; random initial reactivity of the artificial slime moulds. The computer model describes an artificial environment in which artificial slime mould amoebae interact with each other and their environment. Out of these individual interactions the global patterns that characterize slime mould aggregations emerge. The model facilitates the study of these individual interactions and hence the global patterns that emerge. The model and the experimental results described in this thesis contribute to the study of the aggregation phase of the life cycle of Dictyosteliuni discoideum. The author proposes mechanism that could underlie certain classes of aggregation patterns. These patterns include net-like aggregations and loop aggregations. The computer model presented in this thesis is successful in emulating the behaviour of the cellular slime mould Dictyostelium discoideum. In its present form the model is a useful tool to biologists. The results of experiments conducted with the model suggest mechanisms that may underlie certain pattern produced by living slime moulds. A result of particular interest is the initiation of the spiral wave pattern from a loop wave, which produces a loop aggregation.
41
Slinko, Irina. "Essays in option pricing and interest rate models." Doctoral thesis, Stockholm : Economic Research Institute, Stockholm School of Economics [Ekonomiska forskningsinstitutet vid Handelshögskolan i Stockholm] (EFI), 2006. http://www2.hhs.se/EFI/summary/706.htm.
Full text
42
Silvennoinen, Annastiina. "Essays on autoregressive conditional heteroskedasticity." Doctoral thesis, Stockholm : Economic Research Institute, Stockholm School of Economics (EFI), 2006. http://www2.hhs.se/EFI/summary/711.htm.
Full text
43
Turner, Cynthia Michelle, and c. turner@mailbox gu edu au. "An Investigation of the Tripartite Model in Three Age Cohorts of Children and Youth." Griffith University. School of Applied Psychology, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030701.122513.
Full textAbstract:
A large body of literature exists to show that childhood anxiety and depression are significantly interrelated, both at the disorder and the symptom level. Clark and Watson (1991) proposed that a tripartite model could account for the observed relations between anxiety and depression. The tripartite model holds that while anxiety and depression share a substantial component of general affective distress or negative affectivity (NA), they can be meaningfully differentiated on the basis of specific symptoms. Anhedonia, or low positive affect (PA), is seen as specific to depression, and physiological arousal (PH), or somatic tension, is seen as unique to anxiety. The studies presented in this thesis were designed to investigate the tripartite model of anxiety and depression in children and youth. Although previous studies provide some support for the validity of the tripartite model in children, they have not systematically examined the generalisability of the model across the developmental spectrum. Where age differences have been explored, there is some evidence to suggest that anxiety and depression show greater differentiation across development. Therefore, the first study sought to test unitary, dual, and tripartite models of anxiety and depression in a cross-sectional design, using three distinct age cohorts of non-referred children and youth recruited from grade 3 (mean age 7.74 years), grade 6 (mean age 10.59 years), and grade 9 (mean age 13.52 years). A confirmatory factor analytic strategy was used with selected items from the Revised Childrens Manifest Anxiety Scale and the Childrens Depression Inventory. The study found little evidence to support the idea of increasing differentiation with age. All models provided a moderate fit to the data, although analyses indicated that a correlated three-factor tripartite model was the preferred model in all age cohorts. These results suggest that the tripartite model may be a clinically useful tool in differentiating between depressive and anxious symptoms and disorders in children of all ages. The second study then sought to examine the predictive utility of the tripartite model, using a subsample of participants from the first study. In line with the tripartite theory, it was anticipated that the dimensions of NA and PA would predict concurrent and future symptoms of hopelessness (depression). Further, it was expected that the dimensions of NA and PH would predict concurrent and future symptoms of panic (anxiety). Self-report symptoms of hopelessness and panic were measured at baseline and again 12 months later. Results revealed some consistencies and inconsistencies with respect to the predictions of the model. In accordance with predictions, results indicated that NA and PA were significant predictors of concurrent symptoms of hopelessness for grade 3 and grade 6 students, but not for grade 9 students. In addition, NA and PH were significant predictors of concurrent symptoms of panic for grade 6 students, but not for grade 3 or grade 9 students. The tripartite dimensions of NA and PA predicted future hopelessness symptoms for grade 6 students only, however the NA and PH dimensions did not predict future symptoms of panic for any students. Methodology of the study is examined in interpreting the obtained results, and limitations and directions for future research are discussed.
44
Aumeerally, Manisah, and n/a. "Analytic Model Derivation Of Microfluidic Flow For MEMS Virtual-Reality CAD." Griffith University. School of Information and Communication Technology, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20061106.095352.
Full textAbstract:
This thesis derives a first approximation model that will describe the flow of fluid in microfluidic devices such as in microchannels, microdiffusers and micronozzles using electrical network modelling. The important parameter that is of concern is the flow rates of these devices. The purpose of this work is to contribute to the physical component of our interactive Virtual Reality (VR)-prototyping tool for MEMS, with emphasis on fast calculations for interactive CAD design. Current calculations are too time consuming and not suitable for interactive CAD with dynamic animations. This work contributes to and fills the need for the development of MEMS dynamic visualisation, showing the movement of fluid within microdevices in time scale. Microfluidic MEMS devices are used in a wide range of applications, such as in chemical analysis, gene expression analysis, electronic cooling system and inkjet printers. Their success lies in their microdimensions, enabling the creation of systems that are considerably minute yet can contain many complex subsystems. With this reduction in size, the advantages of requiring less material for analysis, less power consumption, less wastage and an increase in portability becomes their selling point. Market size is in excess of US$50 billion in 2004, according to a study made by Nexus. New applications are constantly being developed leading to creation of new devices, such as the DNA and the protein chip. Applications are found in pharmaceuticals, diagnostic, biotechnology and the food industry. An example is the outcome of the mapping and sequencing of the human genome DNA in the late 1990's leading to greater understanding of our genetic makeup. Armed with this knowledge, doctors will be able to treat diseases that were deemed untreatable before, such as diabetes or cancer. Among the tools with which that can be achieved include the DNA chip which is used to analyse an individual's genetic makeup and the Gene chip used in the study of cancer. With this burgeoning influx of new devices and an increase in demand for them there is a need for better and more efficient designs. The MEMS design process is time consuming and costly. Many calculations rely on Finite Element Analysis, which has slow and time consuming algorithms, that make interactive CAD unworkable. This is because the iterative algorithms for calculating the animated images showing the ongoing proccess as they occur, are too slow. Faster computers do not solve the void of efficient algorithms, because with faster computer also comes the demand for a fasters response. A 40 - 90 minute FEA calculation will not be replaced by a faster computer in the next decades to an almost instant response. Efficient design tools are required to shorten this process. These interactive CAD tools need to be able to give quick yet accurate results. Current CAD tools involve time consuming numerical analysis technique which requires hours of numerous iterations for the device structure design followed by more calculations to achieve the required output specification. Although there is a need for a detailed analysis, especially in solving for a particular aspect of the design, having a tool to quickly get a first approximation will greatly shorten the guesswork involved in determining the overall requirement. The underlying theory for the fluid flow model is based on traditional continuum theory and the Navier-Stokes equation is used in the derivation of a layered flow model in which the flow region is segmented into layered sections, each having different flow rates. The flow characteristics of each sections are modeled as electrical components in an electrical circuit. Matlab 6.5 (MatlabTM) is used for the modelling aspect and Simulink is used for the simulation.
45
Lee, Chiao-Tzu Patricia, and N/A. "Applicability of the Integrative Workplace Health Management (IWHM) Model in Taiwan." Griffith University. Griffith School of Environment11, 2007. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070824.102636.
Full textAbstract:
Over the past three decades, globalisation and rapid technological advances have fundamentally changed socio-economic structure and have widespread impacts on the nature of work and workplace health (U. Beck, 2000; Bertucci & Alberti, 2004; Bhalla, 1996; Chu & Dwyer, 2002). They have led to fierce global competition, altered the nature of work and exposed employees to new health risks (Chu & Dwyer, 2002; Stitzel & Jarvisalo, 1997). Fierce market competition demands enterprises and industries to build new competencies, restructure and improve productivity and efficiency. Associated with these changes are increased work pressures, weakening commitment to occupational health and safety, and many negative impacts on workers health (G. Breucker, 2006; Missler & Theuringer, 2003; WHO, 2003). Evidence shows that the world is facing growing burden of work related fatalities, injuries and diseases, particularly a dramatic increase of work stress. As part of the global community, Taiwan has also encountered similar workplace challenges in the rapidly changing environment. It also has to confront with increasing costs from the burden of work-related injuries and diseases and to find appropriate ways to deal with the serious problems (Council of Labour Affairs Taiwan, 2003, 3005; IOSH, 2002). As the success of organisations relies on having well-qualified, motivated and healthy employees, it is essential to seek effective means to protect and promote the health of the working population (ENWHP, 2005). The integrative workplace health promotion (IWHM) model emerging in the 1990s, is regarded as a comprehensive means to address multiple determinants of health and promote employee health (G. Breucker, 2006; Chu, 2003b; WHO-WPRO, 1999). There have been a great number of international successful examples demonstrating the benefits from implementing the IWHM programs (ENWHP, 2002; Chu, Breucker, Harris, & et al., 2000). In response to these workplace challenges and new occupational health risks, Taiwan has followed the international trend to initiate a series of workplace health promotion (WHP) programs since 2001 (Bureau of Health Promotion Taiwan, 2006). However, a preliminary study revealed that many WHP projects in Taiwan have met with difficulties in encouraging employee participation and sustainable development of the programs. These results were not surprising as the majority of the WHP programs in Taiwan tended to narrowly focused on physical activities, weight control and smoking cessation, while ignoring employee needs and problems relevant to specific workplace concerns (Bureau of Health Promotion, 2003; Hsu, Chang, Peng, & Chen, 2002; Hsu, Chen, & Wu, 2004). In this regard, the comprehensive IWHM which aims to meet employee health needs and improve organisational environment may present an effective means for Taiwan to address complex workplace health issues and to create healthy and sustainable workplaces. This research aims to investigate the applicability of the IWHM model in Taiwan to deal with workplace health problems. Apart from reviewing literature and relevant case studies from international communities and in Taiwan, this study conducted a small scale pilot study and a comprehensive needs assessment at selected workplaces in Taiwan as an experiment to test the applicability of the IWHM model. In practice, this research project targeted the civil servants working at the Liming governmental community in Taichung, Taiwan as the research subject. It involves a combination of qualitative and quantitative methods for data collection and analysis. A variety of data collection techniques including in-depth interviews, focus groups, participant observations, secondary data analysis and questionnaire surveys are used to investigate the workplace health and safety problems and the staffs health needs. A triangulation technique is used to compare and contrast the different sources of information. The findings indicated that the IWHM model is applicable in the Liming community in terms of feasible methodological approaches using a needs-based program development and implementation process, and positive program outcomes such as stair improvement to prevent falls and the establishment of long-term health management, meaningful participation, practical program activities and holistic evaluation. For potential program sustainability, this project has involved employee representatives in program implementation and taking in charge of the ongoing program activities, and has managed to establish interdepartmental partnership to address common workplace health issues. Even though this research project has not made great progress, it has been moving toward meeting the project objectives and the organisations needs. From the Liming experience, this research provided recommendations for future development of WHP in Taiwan including: 1) develop national policies to define clear responsibilities in WHP development at different levels; 2) establish appropriate capacity building and training programs; 3) develop practical guidelines and tools tailored to suit Taiwans local conditions and needs; 4) set up effective evaluation and quality management system; 5) provide a professional or technical support team to assist workplaces or industries with the development and implementation of WHP programs.
46
Hjelström, Tomas. "The closed-end investment company premium puzzle : model development and empirical tests on Swedish and British data /." Stockholm : Economic Research Institute, Stockholm School of Economics [Ekonomiska forskningsinstitutet vid Handelshögskolan i Stockholm] (EFI), 2007. http://www2.hhs.se/EFI/summary/723.htm.
Full text
47
Pasqualotti, Adriano. "Ambientes VRML para o ensino-aprendizagem de matemática : modelo conceitual e estudo de caso." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2000. http://hdl.handle.net/10183/77769.
Full textAbstract:
O uso de Ambientes Virtuais (AVs) não-imersivos em educação ainda não foi devidamente explorado e estudado, porém alguns autores já demonstram a diferença que a Realidade Virtual (RV) pode fazer no aprendizado. A linguagem Virtual Reality Modeling Language (VRML) é uma proposta para a introdução de AVs não-imersivos na internet; é uma linguagem independente de plataforma, que permite a criação de AVs por onde se pode passear, visualizar objetos por ângulos diferentes e com eles interagir. Assim, os estudantes podem beneficiar-se dessa tecnologia, pois ela lhes permite acessar objetos que descrevem assuntos e contextos do conteúdo abordado e informações verbal-escritas da disciplina, podendo manuseá-los. Este trabalho possui três partes: na primeira, investigam-se as questões que envolvem o uso de AVs no ensino-aprendizagem de matemática para o desenvolvimento dos aspectos cognitivos; as experiências e as condições necessárias para o uso dessa tecnologia na educação de matemática, como a construção do conhecimento e o desenvolvimento de aspectos cognitivos e lógico-matemáticos. Na segunda parte, propõe-se um modelo conceitual de um ambiente de aprendizagem para o ensino-aprendizagem de matemática, sendo, após, realizada a implementação do ambiente de aprendizagem proposto. A terceira parte reporta um estudo de caso, no qual um AV modelado em VRML é aplicado aos alunos de uma escola. Alguns dados dessa aplicação são levantados e analisados estatisticamente com o fim de se avaliar o desempenho do uso do protótipo no ensino-aprendizagem de matemática.The use of non-immersive virtual environments in education has not been studied, as it should have been. However, some authors have already demonstrated the benefits coming from using such technology. VRML - Virtual Reality Modeling Language provides means for using virtual environments in the Internet. It is a platformindependent language that allows the specification of virtual environments where users can walk in, observe different objects and interact with them. Students can benefit from this technology, since it allows them to access objects describing subjects that students should study. This work is presented in three parts. In the first one, we investigate the use of virtual environments in math education for developing cognitive aspects, the experiences and necessary conditions for using this technology in improving logic and mathematical thinking. In the second part, we present both the conceptual model and the implementation of an educational tool intended to help in math education. The third part is a case study: we have developed a virtual environment using VRML, and it has been applied in math classes for 7th grade students. Data collected during this experiment has been analyzed statistically and some conclusions can be drawn based on those results, and observations.
48
Coyne, Lucy C., and n/a. "The Relationship Between Sociocultural Influences and Disordered Eating Behaviours: Age-Related Differences in an Integrated Theoretical Model." Griffith University. School of Psychology, 2007. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20071114.081853.
Full textAbstract:
This thesis contributes to a growing body of research examining the relationship between sociocultural influences and disordered eating behaviour. The aim of the current research was to extend on previously developed theoretical models to more closely examine agerelated differences in an integrated sociocultural model of disordered eating behaviour. The proposed model was informed by components of the dual-pathway model and the tripartite influence model. Nine-hundred and ninety-five women, from four different age groups (i.e., preadolescent, early adolescent, late adolescent and young adult), completed self-report measures of perceived pressure to be thin, modelling of disordered eating behaviour, media exposure, internalisation of the thin-ideal, social comparison, body dissatisfaction, body mass index, and disordered eating behaviour. Using structural equation modelling (SEM) techniques, a sociocultural model of disordered eating was tested and found to have good fit to the data. A number of age-related differences in the strength of the relationship between variables were found. Interestingly, modelling of disordered eating behaviour was a direct predictor of disordered eating behaviour regardless of age group. As expected internalisation of the thin-ideal mediated between perceived pressure to be thin and body dissatisfaction for all age groups. Surprisingly, media exposure had few effects on internalisation, but was more strongly related to social comparison for the late adolescent and young adult age groups. Social comparison played a less significant role in predicting body dissatisfaction in preadolescent girls. However, for all other participants, social comparison predicted internalisation of the thin-ideal, body dissatisfaction and disordered eating behaviour. As expected, BMI predicted body dissatisfaction, and body dissatisfaction predicted disordered eating behaviour. The models accounted for between 60-64% of the variance in disordered eating behaviour. Implications for prevention programs are discussed in light of these findings.
49
Ham, David R., and n/a. "Parents and Adolescent Depression: Evaluation of a Model and an Intervention Program for Parents." Griffith University. School of Applied Psychology, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060901.165611.
Full textAbstract:
Adolescent depression affects up to 24% of adolescents before adulthood and is linked with serious outcomes. However as only 25% of affected adolescents in Australia receive appropriate assistance the prevention of adolescent depression has a high priority. Risk and protective factors exist in the individual, family, school and society, but the connection between these factors is often uncertain. Prevention at the individual level has been found to be successful but despite the importance of family factors there is little research into prevention at the family level. Because of the difficulty in engaging parents in preventive interventions it has been suggested that convenient, flexible delivery interventions may achieve better penetration. This study evaluates in two stages the Resourceful Adolescent Parent Program (RAP-P), a positively-focused family-based intervention for parents which has been developed to fill the need for a universal preventive intervention for adolescent depression. Firstly the study evaluates the theoretical basis for RAP-P by developing and testing models linking the family-based psychosocial risk and protective factors for teenage depression that are addressed by RAP-P, and the family systems factors underpinning these. No previous models linking these variables could be found in the literature. The study then evaluates two formats of RAP-P, one of three facilitated workshops attended by parents; the other a videotaped flexible delivery format for use at home, developed to overcome parents' poor involvement in preventive programs. Participants were 242 adolescents in Year 8 and 361 of their parents, recruited from eleven schools in Brisbane, Australia. Schools were randomly allocated to one of three conditions: workshop intervention, video intervention and control. Adolescents and parents completed measures at pre-test, post-test and 15 month follow-up. Based on the current adolescent depression literature and Bowen Theory, four models were developed, tested using structural equation modeling and confirmed after minor revisions. The first model examined links between adolescents' depression and the family based risk factors of parent-adolescent conflict and adolescents' negative perceptions of their parents' interactions with them, and the protective factor of parental attachment. Other models, based on Bowen Theory, examined the trans-generational transmission of differentiation of self from the adolescents' grandparents (generation 1) to the adolescents' parents (generation 2) and the effects of parents' differentiation and anxiety on the third generation adolescents' perceptions of their mothers, attachment and depression. The second part of the study examined the implementation and efficacy of the two formats of RAP-P. Predictions that the convenience of the flexible delivery format of RAP-P would result in better recruitment and lower attrition than for the workshop format were not supported, with the flexible delivery format encountering poorer recruitment and higher attrition. Predictions that parents' evaluations of both formats would be equally positive were not supported; the flexible delivery format was consistently evaluated less positively than the workshop format. However parents perceived both formats to be of similar benefit to them. Parents in the intervention conditions were predicted to exhibit better differentiation and lower anxiety than those in the control condition, resulting in their adolescents experiencing less intense conflict over fewer issues and appraising their parents more positively, and consequently exhibiting better parental attachment and lower levels of depression. The level of improvement was predicted to be related to the level of parental engagement in the interventions. However parents and adolescents in the intervention conditions did not show any positive effects of the interventions at post-test or follow-up. Parents who were engaged in the interventions and their adolescents similarly did not show any measurable benefits from the intervention. Thus this study has found support through modeling for the theoretical basis for RAP-P. Parents' feedback strongly supported the overall thrust and ethos of RAP-P and particularly of the workshop format, indicating that the intervention targeted the right factors in the right way. However the interventions did not achieve measurable improvements for parents or adolescents within the time frame of the study. With models supporting the appropriateness of the measured variables it appears that the potency of the intervention was insufficient. Finally the study found that the use of a flexible delivery videotape intervention did not achieve its goal of increased participation and was still very costly of resources.
50
Thorsell, Håkan. "The pricing of corporate bonds and determinants of financial structure /." Stockholm : Economic Research Institute, Stockholm School of Economics (EFI), 2008. http://www2.hhs.se/efi/summary/755.htm.
Full text