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Modeling and visualization of flexible protein-protein interactionsSiddavanahalli, Vinay Kiranshankar, January 1900 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.
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Countering network level denial of information attacks using information visualizationConti, Gregory John 27 March 2006 (has links)
We are besieged with information every day, our inboxes overflow with spam and our search queries return a great deal of irrelevant information. In most cases there is no malicious intent, just simply too much information. However, if we consider active malicious entities, the picture darkens. Denial of information (DoI) attacks assail the human through their computer system and manifest themselves as attacks that target the human's perceptual, cognitive and motor capabilities. By exploiting these capabilities, attackers reduce our ability to acquire and act upon desired information. Even if a traditional denial of service attack against a machine is not possible, the human utilizing the machine may still succumb to DoI attack. When successful, DoI attacks actively alter our decision making, often without our knowledge.
In this dissertation, we address the problem of countering DoI attacks. We begin by presenting a taxonomy and framework of DoI attacks and countermeasures to add structure to the problem space. We then closely examine the use of information visualization as a countermeasure. Information visualization is a powerful technique that taps into the high bandwidth visual recognition capability of the human and is well suited to resist DoI attack. Unfortunately, most information visualization systems are designed without a clear emphasis on protecting the human from malicious activity. To address this issue we present a general framework for information visualization system security analysis. We then delve deeply into countering DoI in the network security domain using carefully crafted information visualization techniques to build a DoI attack resistant security visualization system. By creating such a system, we raise the bar on adversaries who now must cope with visualization enhanced humans in addition to traditional automated intrusion detection systems and text-based analysis tools. We conclude with a human-centric evaluation to demonstrate our systems effectiveness.
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Teachers’ Understanding and Usage of Scientific Data Visualizations for Teaching Topics in Earth and Space ScienceConnolly, Rachel Berger January 2019 (has links)
Scientific data visualizations are the products, and increasingly a core practice, of modern computational science across all domains. With recent science education standards emphasizing student engagement in practices, these scientific visualizations will only increase in their availability and use for K-12 science instruction. But teacher practice is key to the successful learning outcomes for these, and any, educational technology. This study follows eleven science teachers from initial exposure in a PD program through classroom use of scientific data visualizations that address topics in Earth and Space science. The framework of technological pedagogical content knowledge (TPCK) is used to examine key dimensions of teacher knowledge that are activated as they seek to understand the data visualizations and the conceptual models that they represent, select and integrate them into their curriculum, and ultimately use them for instruction. Baseline measures of select dimensions of TPCK are measured for all teachers. Two representative case studies allow for a deep analysis of TPCK in action throughout their professional and instructional experience, and finally the impact on teachers’ knowledge from the experience is examined, with implications for educative curricular material and PD program design.
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Geo-temporal visualization for tourism data using color curvesIn Kwon Choi (6623771) 10 June 2019 (has links)
A study on using colors to represent the floating population of tourists
and local residents on the map by each hour in each month. The
resulting visualization can assist the decision-making in various areas
by providing a vivid description of the movement of people in a day.
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Desenvolvimento de interface para visualização de alterações na configuração territorialD Avila, Guilherme Blaia 12 May 2011 (has links)
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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
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Enhanced Computer Graphics for Decision MakersBrock, 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.
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A Task-Centered Visualization Design Environment and a Method for Measuring the Complexity of Visualization DesignsSuo, 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.
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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).
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A cognition-based framework for the development of visualization literacyVelez-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).
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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.
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