Thesis (Ph.D.) - University of Queensland, 2005. / Includes bibliography.

Thesis (M.S.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 107-109). Also available on the World Wide Web.

Thesis (Ph. D.)--Lehigh University, 2000. / Includes vita. Includes bibliographical references (leaves 135-149).

Thesis (Ph.D.)--Drexel University, 2008. / Includes abstract and vita. Includes bibliographical references (leaves 147-153).

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At the core of this thesis lies the concept of triggers and how a trigger’s general purpose is to raise attention to something. We discuss the similarities of triggers, entry points, and affordances in terms of medium dependency and information value, and how they can co-exist. As a basis of our trigger discussion we consider active and passive attention along with the use of tools as triggers. A number of problems are identified in trigger use, including continuous or discrete triggers and information value. Finally, suggestions are made regarding the handling of triggers, entry points, and affordances from a designer’s point of view. We discuss and suggest that triggers and their contextual elements can be handled and designed on the basis of their type, information demand, cognitive congeniality, and characteristics. Key words: Trigger, entry point, affordance, cognitive congeniality, attention, task transformations, information demand, medium dependency, information value.

Orientador: Maria Cecilia Calani Baranauskas / Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-09T14:54:53Z (GMT). No. of bitstreams: 1 OliveiraJunior_JoaoAmancioGoncalvesde_M.pdf: 2684989 bytes, checksum: ca152f731ff422f4d3ed7f6393e12ea6 (MD5) Previous issue date: 2006 / Resumo: A Web é um grande repositório de informações, tendo se mostrado um meio democrático onde, usuário com conhecimentos mínimos em informática pode produzir e publicar páginas na Internet. Como manter as interfaces Web atraentes, simples e principalmente usáveis quando materiais sem qualidade, têm sido disponibilizados na Web? São necessárias freqüentes avaliações evitando problemas de usabilidade do Web site. Mas essas avaliações dependem de recursos que hoje ficam restritos às grandes empresas, devido ao custo de aplicações de técnicas de usabilidade. Para que o acesso a essas avaliações seja freqüente, as pequenas empresas dependem de métodos de baixo custo, e que possam ser aplicados por pessoas não especialistas em usabilidade. O objetivo deste trabalho é desenvolver uma aplicação Web que promova a usabilidade das interfaces Web, o USEWEB. Seu uso é simples, facilmente aplicável por pessoa não especialista em usabilidade, contribuindo para oportunizar às pequenas empresas de avaliarem suas aplicações de forma eficiente, com baixos custos, combinando o questionário de satisfação e checklist como métodos de avaliação. Para verificar a aplicabilidade do USEWEB, foi realizado teste piloto no Portal ¿Todos Nós¿. Os resultados obtidos confirmaram a validade da proposta, mostrando-se eficiente na detecção de problemas de usabilidade com a aplicação dos métodos de avaliação / Abstract: The Web is a great repository of information, tends if shown a democratic way where, user with minimum knowledge in computation can produce and to publish pages in Internet. Has the web provided attractive, simple and useful web interface material with quality? Or even without quality? They are frequent necessary evaluations avoiding usability problems in the Web site. But those evaluations depend on resources nowadays are restricted to big companies, due to the high cost of the usage of usability techniques. So that the access the evaluations are frequent, the small companies depend on low cost methods, and that can be applied for people no expert in usability. The objective of this work is to develop an application Web to promote the usability of the interfaces Web, called USEWEB. Its usage is simple and easily understood even by people who are no experts in usability ¿ turning the USEWEB available for small companies to evaluate its usage in an efficient way and with low costs. That would combine the user¿s satisfaction questionnaire and the checklist as the evaluation methods.A test in the portal ¿Todos Nós¿ was taken to check out the usage of the USEWEB. The results confirmed the viability of the proposal proving to be an efficient way to detect problems of usability through the two evaluation methods / Mestrado / Mestre em Ciência da Computação

This thesis considers the proposition that hypermedia may be employed effectively in higher education. More specifically, the question of its use by undergraduate music students to assist in writing essays and dissertations is investigated. The work begins with a review of general issues relating to educational hypermedia, such as its history, application, design and architecture. A user-centred approach to hypermedia development is advocated, and after critique and analysis of the literature, a framework for human-computer interaction for educational hypermedia is proposed. A case study is reported which serves to facilitate the undertaking of original research, as well as to evaluate the proposed framework. Other environments are also selected to carry out more generic research. Both reading strategies and writing strategies are investigated, and the results from these studies are used to conduct a repertory grid analysis of students' approaches to and perceptions of essay and dissertation development. The outcome of this experiment concludes with a proposal for a structural model of essay and dissertation development. Analysis of the model suggests the need for further survey analysis of taskartefact usage in specific educational domains, and experimental studies into electronic document manipulation and the reading of music from computer screens are investigated with respect to the case study environment. The implications of the research carried out in this thesis have assisted in and helped to justify the design of the prototype system HECTOR (Hypermedia, from Essay Conception TO Realisation). It aims to support students in their research, planning and writing of essays and dissertations. HECTOR has been evaluated in the field, and the results of this go some way to supporting the hypothesis of the thesis - that hypermedia can be employed effectively in higher education.