• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 288
  • 125
  • 14
  • 12
  • 8
  • 5
  • 3
  • 2
  • 1
  • 1
  • Tagged with
  • 517
  • 517
  • 171
  • 127
  • 127
  • 88
  • 87
  • 77
  • 66
  • 57
  • 56
  • 53
  • 51
  • 45
  • 44
  • 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.

Desenvolvimento de interface para visualização de alterações na configuração territorial

D Avila, Guilherme Blaia 12 May 2011 (has links)
Made available in DSpace on 2016-04-29T14:22:52Z (GMT). No. of bitstreams: 1 Guilherme Blaia DAvila.pdf: 1840808 bytes, checksum: 1c9061f1bf634734e2fb50f29b7ce8b6 (MD5) Previous issue date: 2011-05-12 / The goal of this research is the construction of an interface prototype for the visualization of changes in the territorial configuration, having as its starting point information from the Macro tool, whose author is Prof. Dr. Nelson Brissac Peixoto. A tool that enables the user to visualize and understand the relations among regional and global processes and their changes along time was created, turning large scale processes that were inaccessible to the individual experience into comprehensive information. To do so, it was made necessary the effort to synthesize the information contained on Macro, extracting its basic attributes and enabling its clustering and categorization. It was also necessary to create a versatile visual representation system that is capable of referencing each and every element of information. The prototype that was developed during this research can be used with different goals. It can be viable either for academic use or could be used by the government and companies. Its utilization as a tool could help the comprehension of the dynamics of territorial configuration, its cause and effect relations and connections between regional and global processes / Esta pesquisa tem como meta a construção de um protótipo de interface para a visualização de alterações na configuração territorial, tendo como ponto de partida informações contidas na ferramenta Macro, de autoria do Prof. Dr. Nelson Brissac Peixoto. Foi criada uma ferramenta que possibilita ao usuário visualizar e compreender relações entre processos regionais e globais e suas modificações ao longo do tempo, tornando apreensíveis processos em grande escala que são inacessíveis à experiência individual. Para tanto, tornou-se necessário sintetizar a informação inerente à ferramenta Macro, extraindo seus atributos básicos e possibilitando seu agrupamento e categorização, e também criar um sistema de representação visual abrangente e versátil que fosse capaz de referenciar todo e qualquer elemento de informação. O protótipo desenvolvido mostrou-se factível de introdução para diversos fins. Pode ser viável tanto para uso acadêmico como para o uso por instâncias governamentais e empresariais. Sua utilização como ferramenta pode auxiliar na compreensão das dinâmicas de configuração territorial, suas relações de causa e efeito, ligações entre processos regionais e locais

Enhanced Computer Graphics for Decision Makers

Brock, Floyd James, Jr. 01 January 1986 (has links)
Words need a context to be understood. Visual patterns also need a context to convey their meaning. When patterns represent quantities in business graphics, decision makers (DMs) depend on contrasting visual contexts to discern patterns and discover relationships. Depending on the context in which DMs see trends, differences between two trends may point to a problem, to continuity, or to an opportunity. Can enhancing the context in computer graphics help DMs visualize problems? To answer this research question, three experiments were done in the field on computer graphics. One hundred five DMs tried 17 different contexts for time-series trends displayed on a microcomputer monitor. The research objective was to find out whether changing the context in graphics affected the decision efficiency (accuracy/response time) of DMs in determining relationships among trends. Essential for measuring the effect were interactive computer programs that displayed random trends in graphics of differing contexts, collected the DMs' answers to questions about the trends, and graded 1133 graphics based on the answers, response times, and trend data. The experimental results supported the hypothesis that computers can enhance the visual context surrounding time-series trends so that DMs can better visualize problems. Results were based on comparisons of DMs' decision efficiencies between trial graphics with differing contextual enhancements and based on answers to questions about the trial graphics. The results were tested with nonparametric statistics at the 0.05 significance level. Specific findings were: (1) Computer-supplied forecasts, as an enhancement, significantly helped DMs discover differences among trends. (2) Although not statistically significant, stratified presentation of trends and fading chartjunk tended to increase DMs' efficiencies. (3) Adding two colors, as an enhancement, made no difference in efficiency over black and white. (4) Paired trends in windows did not affect efficiency significantly. (5) Sequentially traced trends and composites of enhancements did not affect efficiency significantly. (6) DMs preferred stratified trends most and had the most confidence in graphics with fading context. They least liked and had the least confidence in black-and-white graphics.

A Task-Centered Visualization Design Environment and a Method for Measuring the Complexity of Visualization Designs

Suo, Xiaoyuan 17 July 2009 (has links)
Recent years have seen a growing interest in the emerging area of computer security visualization which is about developing visualization methods to help solve computer security problems. In this thesis, we will first present a method for measuring the complexity of information visualization designs. The complexity is measured in terms of visual integration, number of separable dimensions for each visual unit, the complexity of interpreting the visual attributes, number of visual units, and the efficiency of visual search. This method is designed to better assist fellow developers to quickly evaluate multiple design choices, potentially enables computer to automatically measure the complexity of visualization data. We will also analyze the design space of network security visualization. Our main contribution is a new taxonomy that consists of three dimensions – data, visualizations, and tasks. Each dimension is further divided into hierarchical layers, and for each layer we have identified key parameters for making major design choices. This new taxonomy provides a comprehensive framework that can guide network security visualization developers to systematically explore the design space and make informed design decisions. It can also help developers or users systematically evaluate existing network security visualization techniques and systems. Finally it helps developers identify gaps in the design space and create new techniques. Taxonomy showed that most of the existing computer security visualization programs are data centered. However, some studies have shown that task centered visualization is perhaps more effective. To test this hypothesis, we propose a task centered visualization design framework, in which tasks are explicitly identified and organized and visualizations are constructed for specific tasks and their related data parameters. The center piece of this framework is a task tree which dynamically links the raw data with automatically generated visualization. The task tree serves as a high level interaction technique that allows users to conduct problem solving naturally at the task level, while still giving end users flexible control over the visualization construction. This work is currently being extended by building a prototype visualization system based on a Task-centered Visualization Design Architecture.

Visualization of Weather Data : Temperature trend visualization

Liu, Jiayi January 2012 (has links)
Weather data are huge. Traditional visualization techniques are limited to show temperature trends. Pixel-based approaches could be used to visualize the huge amount of weather data and in process show the temperature trends. A prototype using this approach is built to make temperature data more understandable in changing trends. It is implemented using a 2D representation and many popular interaction techniques. It is a lightweight and reusable tool to visualize temperatures.

How information visualization systems change users' understandings of complex data /

Allendoerfer, Kenneth Robert. Chen, Chaomei, January 2009 (has links)
Thesis (Ph.D.)--Drexel University, 2009. / Includes abstract and vita. Includes bibliographical references (leaves 207-216).

A cognition-based framework for the development of visualization literacy

Velez-Rojas, Maria C., January 2009 (has links)
Thesis (Ph. D.)--Rutgers University, 2009. / "Graduate Program in Electrical and Computer Engineering." Includes bibliographical references (p. 140-146).

Individual differences in information seeking the effects and interaction of spatial, visualization and domain expertise /

Downing, Ricard E. January 2003 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2003. / Typescript. Vita. Includes bibliographical references (leaves 86-95). Also available on the Internet.

Visualizing threat and impact assessment to improve situation awareness /

Nusinov, Michael Cooper. January 2009 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 2009. / Typescript. Includes bibliographical references (leaves 59-61).

Individual differences in information seeking : the effects and interaction of spatial, visualization and domain expertise /

Downing, Ricard E. January 2003 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2003. / Typescript. Vita. Includes bibliographical references (leaves 86-95). Also available on the Internet.

Visual search interfaces for online digital repositories

Clarkson, Edward Cantey. January 2009 (has links)
Thesis (Ph.D)--Computing, Georgia Institute of Technology, 2009. / Committee Chair: Foley, James D.; Committee Member: Abowd, Gregory D.; Committee Member: Marchionini, Gary; Committee Member: Potts, Colin; Committee Member: Stasko, John. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Page generated in 0.1979 seconds