Dissertations / Theses: 'Visualization of educational information'

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Johnson, Aaron W. "Centralized Visualization of Distributed Collaborative Note-taking." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3147.

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This development project originated in response to the enormous daily increase of information that becomes available on the internet as a result of social media activities. Twitter, a quintessential example of social media, can also be considered a framework for collaborative note-taking. The October 2010 General Conference of the Church of Jesus Christ of Latter-day Saints provided an interesting example of distributed collaborative note-taking as thousands of Twitter users took notes on the conference addresses. The result was a collection of 26,479 tweets. The purpose of this project is to describe a novel information visualization algorithm that generates a centralized visual representation of the conference tweets to facilitate absorption of the ideas presented therein. This algorithm could feasibly be used in many other massively distributed collaborative note-taking activities. It is hoped that this algorithm, as well as the variant approaches that it may inspire, will assist larger groups to deal with the potential information overload that can arise in these collaborative note-taking activities.

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Runhem, Alexandra. "Adding insight in educational lecture environments with ARS : A post-presentation analysis using an interactive visualization tool." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254991.

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Feedback plays an important role in evaluating and developing courses in higher education. Due to inefficient factors, the feedback cycle does not meet its full potential and can therefore be counterproductive. Current evaluation methods typically demand much effort from both students and teachers, when asking for feedback at the end of the course and analyzing the results. Lack of engagement can thus be observed in both parties. Moreover, we can see an increasing trend of ARS used in educational settings, to improve learning quality and enhance the relationship between the presenter and audience. This study’s aim was to make the feedback process more efficient and to explore how to provide insight in lecture quality for continuous course development. To fully understand the target user, a pre-study was conducted to identify design requirements and to investigate which areas to evaluate during the courses and why. The interview sessions resulted in four main dimensions to evaluate; Meaningfulness, comprehension, knowledge and attitude. Based on these dimensions, a feedback tool was developed to gather the feedback data from students in two different cohorts. The tool was developed in a survey format, with the help of an existing ARS. The feedback was then collected after two university lectures during two courses. To explore the potential of providing useful insight to the lecturer, and to facilitate the analytical step of the process, an interactive visualization tool was prototyped to display the data. The visualization tool was evaluated, both in terms of usability and its overall concept, with a total of eight lecturers, two of which were lecturers in the courses used to gather the feedback data. Even though the results show that it might be difficult to draw a single conclusion of the tools’ usability, the users found the concept interesting and were positive towards the idea. The perception of the tool’s intended use varied and is discussed along with future development. Feedback spelar en viktig roll när det kommer till utvärdering och utveckling av kurser inom högre utbildning. På grund av ineffektiva faktorer uppnår feedbackcykeln inte sin fulla potential och kan därför vara kontraproduktiv. Aktuella utvärderingsmetoder kräver typiskt mycket ansträngning från både elever och lärare och brist på engagemang kan således observeras hos båda parter. Dessutom kan vi se en ökande trend av ARS som används i utbildningsinstitutioner, för att förbättra utbildningskvaliteten samt förhållandet mellan presentatören och publiken. Syftet med studien var att göra feedbackprocessen mer effektiv och undersöka hur man kan ge insikt i föreläsningskvaliteten för kontinuerlig kursutveckling. För att förstå slutanvändaren genomfördes en förundersökning för att identifiera deras begär och för att undersöka vilka områden som ska utvärderas under kurserna och varför. Intervjuerna resulterade i fyra huvuddimensioner att utvärdera och ge insikt inom; Betydelse, förståelse, kunskap och attityd. Baserat på dessa dimensioner utvecklades ett feedbackverktyg. Verktyget var i form av ett formulär och producerades med hjälp av ett befintlig ARS. Feedbackdatan samlades sedan in efter två universitetsföreläsningar under två kurser. För att undersöka möjligheten att ge föreläsaren användbar insikt och för att underlätta det analytiska steget i processen, utvecklades ett interaktivt visualiseringsverktyg. Visualiseringsverktyget utvärderades, både vad gäller användbarhet och dess övergripande koncept, med totalt åtta föreläsare. Även om resultaten visar att det kan vara svårt att dra en enda slutsats av verktygets användbarhet, fann användarna konceptet intressant och var överlag positiva. Uppfattningen av verktygets avsedda användning varierar och diskuteras tillsammans med framtida utveckling.

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Ragan, Eric Dennis. "Supporting Learning through Spatial Information Presentations in Virtual Environments." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23207.

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Though many researchers have suggested that 3D virtual environments (VEs) could provide advantages for conceptual learning, few studies have attempted to evaluate the validity of this claim. While many educational VEs share the challenge of providing learners with information within 3D spaces, few researchers have investigated what approaches are used to help learn new information from 3D spatial representations. It is not understood how well learners can take advantage of 3D layouts to help understand information. Additionally, although complex arrangements of information within 3D space can potentially allow for large amounts of information to be presented within a VE, accessing this information can become more difficult due to the increased navigational challenges. Complicating these issues are details regarding display types and interaction devices used for educational applications. Compared to desktop displays, more immersive VE systems often provide display features (e.g., stereoscopy, increased field of view) that support improved perception and understanding of spatial information. Additionally, immersive VE often allow more familiar, natural interaction methods (e.g., physical walking or rotation of the head and body) to control viewing within the virtual space. It is unknown how these features interact with the types of spatial information presentations to affect learning. The research presented in this dissertation investigates these issues in order to further the knowledge of how to design VEs to support learning. The research includes six studies (five empirical experiments and one case study) designed to investigate how spatial information presentations affect learning effectiveness and learner strategies. This investigation includes consideration for the complexity of spatial information layouts, the features of display systems that could affect the effectiveness of spatial strategies, and the degree of navigational control for accessing information. Based on the results of these studies, we created a set of design guidelines for developing VEs for learning-related activities. By considering factors of virtual information presentation, as well as those based on the display-systems, our guidelines support design decisions for both the software and hardware required for creating effective educational VEs. Ph. D.

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Söderström, Arvid, and Johanna Thorheim. "Design and evaluation of an educational tool for understanding functionality in flight simulators : Visualising ARINC 610C." Thesis, Linköpings universitet, Interaktiva och kognitiva system, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137686.

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The use of simulation in aircraft development and pilot training is essential as it saves time and money. The ARINC 610C standard describes simulator functionality, and is developed to streamline the use of flight simulators. However, the text based standard lacks overview and function descriptions are hard to understand for the simulator developers, who are the main users. In this report, an educational software tool is conceptualised to increase usability of ARINC 610C. The usability goals and requirements were established through multiple interviews and two observation studies. Consequently, six concepts were produced, and evaluated in a workshop with domain experts. Properties from the evaluated concepts were combined in order to form one concluding concept. A prototype was finally developed and evaluated in usability tests with the potential user group. The results from the heuristic evaluation, the usability tests, and a mean system usability score of 79.5 suggests that the prototyped system, developed for visualising ARINC 610C, is a viable solution.

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Carvalho, Marta Pinto de. "U-TRACER® - the use of communication technology in higher education - an information visualization tool for the context of Portuguese public higher education." Doctoral thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/13140.

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Doutoramento em Multimédia em Educação Information Visualization is gradually emerging to assist the representation and comprehension of large datasets about Higher Education Institutions, making the data more easily understood. The importance of gaining insights and knowledge regarding higher education institutions is little disputed. Within this knowledge, the emerging and urging area in need of a systematic understanding is the use of communication technologies, area that is having a transformative impact on educational practices worldwide. This study focused on the need to visually represent a dataset about how Portuguese Public Higher Education Institutions are using Communication Technologies as a support to teaching and learning processes. Project TRACER identified this need, regarding the Portuguese public higher education context, and carried out a national data collection. This study was developed within project TRACER, and worked with the dataset collected in order to conceptualize an information visualization tool U-TRACER®. The main goals of this study related to: conceptualization of the information visualization tool U-TRACER®, to represent the data collected by project TRACER; understand higher education decision makers perception of usefulness regarding the tool. The goals allowed us to contextualize the phenomenon of information visualization tools regarding higher education data, realizing the existing trends. The research undertaken was of qualitative nature, and followed the method of case study with four moments of data collection.The first moment regarded the conceptualization of the U-TRACER®, with two focus group sessions with Higher Education professionals, with the aim of defining the interaction features the U-TRACER® should offer. The second data collection moment involved the proposal of the graphical displays that would represent the dataset, which reading effectiveness was tested by end-users. The third moment involved the development of a usability test to the UTRACER ® performed by higher education professionals and which resulted in the proposal of improvements to the final prototype of the tool. The fourth moment of data collection involved conducting exploratory, semi-structured interviews, to the institutional decision makers regarding their perceived usefulness of the U-TRACER®. We consider that the results of this study contribute towards two moments of reflection. The challenges of involving end-users in the conceptualization of an information visualization tool; the relevance of effective visual displays for an effective communication of the data and information. The second relates to the reflection about how the higher education decision makers, stakeholders of the U-TRACER® tool, perceive usefulness of the tool, both for communicating their institutions data and for benchmarking exercises, as well as a support for decision processes. Also to reflect on the main concerns about opening up data about higher education institutions in a global market. A Visualização de Informação emerge gradualmente como uma área que assiste a representação e a compreensão de dados sobre as instituições de Ensino Superior. Esta compreensão e conhecimento aprofundado sobre as instituições de Ensino Superior tem uma importância internacional reconhecida. Uma das áreas emergentes do Ensino Superior, com um impacte transformador das práticas educativas em todo o mundo e que urge conhecer e compreender de forma sistematizada, relaciona-se com o uso das Tecnologias da Comunicação no suporte às práticas pedagógicas. No foco deste trabalho está a necessidade de representar visualmente um conjunto de dados recolhido no âmbito do projeto TRACER, sobre e o uso que as Instituições de Ensino Superior Público Português fazem das Tecnologias da Comunicação como suporte aos processos de ensino e aprendizagem. O projeto TRACER identificou esta necessidade e fez uma recolha de dados a nível nacional. Este estudo desenvolveu-se no âmbito deste projeto, e utilizou os dados recolhidos com o objetivo de conceptualizar uma ferramenta de visualização de informação - U-TRACER® - que daria visibilidade a esses dados. Os principais objetivos deste estudo prendem-se com: a conceptualização da ferramenta de visualização de informação denominada U-TRACER®, para o contexto do Ensino Superior Português; a compreensão sobre a utilidade desta plataforma para decisores das instituições de Ensino Superior Português, no suporte a processos de tomada de decisão. Os objetivos permitiram contextualizar o fenómeno das ferramentas de visualização da informação com dados sobre instituições de Ensino Superior, perceber as tendências de uso da visualização de informação nesse contexto.A investigação de natureza qualitativa, seguiu princípios de Investigação & Desenvolvimento adotando o método de estudo de caso desenvolvido em quatro fases de recolha de dados. A primeira fase prendeu-se com a conceptualização da plataforma U-TRACER®, tendo-se desenvolvido duas sessões de focus group com profissionais do ensino superior, com o objetivo de conhecer de definir os requisitos de interação da ferramenta. A segunda fase deu origem à proposta de representação gráfica dos dados recolhidos no Âmbito do projeto TRACER “O uso das Tecnologias da Comunicação no Ensino Superior Público Português”, e um teste à eficácia de leitura dos gráficos propostos. A terceira fase envolveu um teste de usabilidade à ferramenta U-TRACER®, por profissionais do Ensino Superior enquanto utilizadores finais, tendo resultado na proposta de melhorias ao protótipo final. A quarta fase de recolha de dados envolveu a realização de entrevistas semiestruturadas, realizadas a decisores de Instituições de Ensino Superior Público Português, com o objetivo de compreender a sua perceção relativamente à utilidade da U-TRACER®. Considera-se que os resultados deste estudo contribuíram para a área da visualização de informação como suporte à representação de dados sobre o Ensino Superior; refletir sobre a necessidade de envolvimento dos utilizadores finais no processo de conceptualização da ferramenta; a importância da representação gráfica na comunicação eficaz da informação; e conhecer a perceção dos decisores das instituições do ensino superior sobre a utilidade desta ferramenta utilizada como meio para a comunicação de informação sobre a sua instituição, como exercício de benchmarking, e a sua utilidade como suporte a processos informação e decisão que envolvem o uso das Tecnologias da Comunicação. Este estudo contribui ainda para a reflexão sobre a abertura de dados de instituições de Ensino Superior num mercado global.

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Moore, Jacob Preston. "Promoting Conceptual Understanding via Adaptive Concept Maps." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23678.

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The purpose of this study is to explore the feasibility and effectiveness of a scalable concept map based navigation system for a digital textbook. A literature review has been conducted to identify possible methods to promote conceptual understanding in the context of a digital textbook, and these hypothesized solutions will be evaluated through a prototype tool. The primary method that has been selected for this study to promote conceptual understanding in textbooks is the concept map. When concept maps are used as advance organizers or navigation aids for hypermedia documents, they have been shown to promote conceptual understanding. Issues with scalability exist, however. When maps become too large or complicated, a phenomenon labeled "map-shock" occurs. Map-shock is a result of cognitive overload that nullifies the positive effects the concept map has on learning. In order to eliminate map-shock, one needs to manage the cognitive load imposed on the learner. This project proposes using information visualization techniques leveraged from the computer science domain to develop an interactive concept map based navigation system that will retain the positive effects of concept maps, and also present the visuals in a way that does not cognitively overload the user. This study seeks to answer the research question: "How can a large-scale concept map visualization tools be realized in a way that promotes conceptual understanding and manages cognitive load?" To answer the research question, a prototype tool, labeled the "Adaptive Map tool", was developed and populated with engineering statics content. This prototype contains content that is similar to the material in a traditional statics textbook, but the information is accessed through the proposed adaptive concept map visualization. The tool was then given to students in engineering statics class to be used as a supplemental textbook. The effects of the Adaptive Map tool were evaluated through a multiple case study approach that allowed researchers to understand how this tool fit into the larger learning context of a class. Results indicated that some students did integrate the Adaptive Map tool into the learning process, and furthermore that the tool did promote meaningful learning behaviors that lead to better conceptual understanding of the material. Ph. D.

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Musunuru, Venkata Krishna Kanth. "Virtuo-ITS: An Interactive Tutoring System to Teach Virtual Memory Concepts of an Operating System." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1495481049986755.

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Olsson, Marie. "Digital learning resources for programming in higher education – a multimodal perspective." Licentiate thesis, Stockholms universitet, Institutionen för data- och systemvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-153200.

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Digital technology is developing rapidly, and educators are currently in the process of exploring what opportunities new technology can have for learning and teaching. This applies not least to the field of education in programming, as learning to program is a great challenge for many students. Therefore, educators and researchers have sought to find educationally effective digital learning resources to facilitate the programming learning process. In this thesis, multimodal online learning environments, providing accessible and learner-focused learning activities, and multimodal software visualizations, striving at concretizing the abstract building blocks in programming languages, were exploratory investigated. The aim was to expand the understanding of how digital learning resources can be used to support students’ understanding of basic programming concepts and dynamics. Empirical studies were conducted at the Department of Computer and Systems Sciences (DSV) at Stockholm University, Sweden. The data were collected during introductory programming courses in which the author had an active role as designer of the software visualizations, teacher and researcher. In these courses, the digital learning resources were explored as additional course resources. The research was conducted both through field experiments and case studies and data was collected using questionnaires, interviews and group discussions. Results strengthened the claims that abstract phenomena like programming can be made visible and understandable through visualization, in particular program dynamics. When visualizations illustrated more conceptual elements, further guidance was required, to facilitate students’ interpretation and understanding. Regarding the online learning environments, guiding to the right learning pathways was the most critical factor found from the results. When adequate instructions and feedback were lacking in the learning environments, users became cognitively overloaded and disoriented. Finally, findings in all compiled studies indicate that teacher planning and orchestration of the learning situations should be conducted with more reflection.

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Шкарупа, Ганна. "Використання інформаційних технологій візуалізації у процесі розвитку компетентностей майбутніх дизайнерів". Thesis, Київський національний університет технологій та дизайну, 2018. https://er.knutd.edu.ua/handle/123456789/10495.

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Проаналізовано дослідження останніх років в галузі розвитку професійної компетентності майбутніх дизайнерів. Зокрема, таких компонентів як творчість, здатність до просторових маніпуляцій з проектованими об'єктами, а також використання інформаційних технологій візуалізації. The proposed theses analyze the research of recent years in the development of professional competence of future designers. In particular, such components as creativity, the ability to spatial manipulations with projected objects, as well as the use of information technology visualization.

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Dario, Dineide. "Aplicação de técnicas de visualização de informação em ferramentas para apoio à avaliação formativa em sistemas de EaD." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275767.

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Orientador: Heloísa Vieira da Rocha Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação Made available in DSpace on 2018-08-17T10:16:12Z (GMT). No. of bitstreams: 1 Dario_Dineide_M.pdf: 3873231 bytes, checksum: 611985fd918b6460c572282b88cfc915 (MD5) Previous issue date: 2010 Resumo: Com o crescimento da Educação a Distância online (EaD), cresce também a necessidade de suporte a novos e mais efetivos métodos de avaliação para esta modalidade, como a Avaliação Formativa, que permite monitorar e orientar continuamente a participação dos alunos no desenvolvimento de uma ação de aprendizagem. As ferramentas para suporte a este método de avaliação coletam muitos indicadores de participação, que são gerados na forma de volumosos dados, o que geralmente dificulta a sua análise e consequente uso no processo de acompanhamento pelo avaliador. Por isso, é proposta neste trabalho a aplicação de técnicas de Visualização de Informação sobreas informações geradas por uma ferramenta de Avaliação Formativa para auxiliar na análise dos dados coletados, por meio de representações gráficas interativas que permitam explorar as informações em diferentes níveis de granularidade. Para avaliar a proposta, foi desenvolvido um protótipo da ferramenta de Visualização de Informação integrada à ferramenta de Avaliação Formativa implementada na segunda fase do projeto TIDIA-Ae pelo grupo e-Labora. A avaliação desse protótipo em uma simulação de curso indicou a efetividade da proposta, mostrando que a aplicação de técnicas de Visualização de Informação na análise das informações geradas por uma ferramenta de suporte à Avaliação Formativa auxilia formadores e aprendizes nesse processo, trazendo maior agilidade, dinamismo e praticidade ao acompanhamento da ação de aprendizagem, através de novas e significativas visões acerca das participações Abstract: The growth of online Distance Education (e-learning) causes growth of the need to support new and more effective methods of assessment, as the Formative Assessment, which allows continuous monitoring and guidance of students participation in the development of a learning action. The tools to support this assessment method collect many indicators of participation, which are generated in the form of huge amounts of data, often complicating the analysis and consequent use of this information in the monitoring process by the assessor. Therefore this work proposes the application of techniques of Information Visualization on the information generated by a Formative Assessment Tool to assist in analyzing the data collected through interactive graphical representations to exploit the information at different levels of granularity. In order to evaluate the proposal, a prototype for an Information Visualization Tool has been developed integrated with Formative Assessment Tool implemented in the second phase of theproject TIDIA-Ae by the e-Labora group. The evaluation of this prototype in a simulated course demonstrated the effectiveness of the proposal, indicating that the application of Information Visualization techniques to analyze the information generated by a support tool for Formative Assessment helps teachers and learners in this process. The monitoring of a learning action gained greater agility, dynamism and practicality, through new and significant visions about the participation Mestrado Visualização de Informação Mestre em Ciência da Computação

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Bruckner, Terri Ann. "Using an Argument-based Approach to Validity for Selected Tests of Spatial Ability in Allied Medical Professions Students." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1371562493.

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Tyboni, Cecilia. "Visualization of Dynamic Information." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-12422.

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Sandvik IT Services (SITS) ambition is to provide a smooth and suitable IT environment for the whole Sandvik organization. The idea is that SITS should provide end-to-end solutions globally in an efficient manner. To ensure that they can provide this, they have to be efficient in their work. To handle problems regarding incident and support, they have a large TV screen that shows important information about different processes. The demand for the information has increased; therefore the information displayed on the screen has also increased. Today, the amount of information on the screen is too big and it makes the information difficult to read and absorb. This work will help make SITS application management more effective in the future. Through Workshops for both managers and developers, it is necessary to find out the difference of what SITS requires to diversify priority information. And also be able to view the information in a user-friendly way, a layout of the information is suggested. The result of this work is to produce a design proposal.

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Almerfors, Mattias. "Visualization of Personalization Information." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97829.

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There has been an increasing use of Internet as an information source and also as a new channel for business-to-business and business-to-consumer communication. This has lead to an increasing need for understanding web traffic and especially a growing need for analyzing this traffic, which demands new analysis tools. The objective for this study was to create an application framework for visualizing XML-formatted data representing web traffic reports. Visualization in two dimensions is created by using Batik, a Java ™ toolkit with the purpose of transforming a well formed XML document into a SVG document and then transcode this into an image format supported by today’s web browsers. Visualization in three dimensions is created by using the Java3D API. In order to create an aesthetically well-balanced graph in three dimensions representing a model of the web traffic on a site, the framework uses a layout algorithm called Graphical Embedder (GEM). This is a force-directed algorithm which uses physical analogy to model the graph. GEM emphasises the spring force approach combined with simulated annealing and the detection of oscillations and rotations. The design of the framework is built up using J2EE techniques. At the front-end this application framework uses JSP and Applet showing the graph for a customer using this service. At the back-end the framework uses Servlets combined with a Filter.

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Santos, Cristina Russo dos. "3D metaphoric information visualization /." Paris : École nationale supérieure des télécommunications, 2002. http://catalogue.bnf.fr/ark:/12148/cb38915995f.

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Pernomian, Viviane Araujo. "Visualização exploratória de dados do desempenho na aprendizagem em um ambiente adaptável." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-04072008-094317/.

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A visualização de informação procura interpretar as informações contidas em um conjunto de dados e através de técnicas visuais, perceber relacionamentos e padrões que auxiliam na descoberta de novos conhecimentos. O grande volume de informações nas bases educacionais sobre o rendimento na aprendizagem aumenta a dificuldade em analisar o desempenho na aprendizagem dos estudantes. Indicadores educacionais como nota, índice de aprovação e reprovação não podem ser considerados únicos medidores do desempenho, porém junto aos estilos de aprendizagem dos estudantes e perfil metodológico das disciplinas podem revelar informações sobre o desempenho. As técnicas de visualização combinadas com análises estatísticas pode ser considerada uma alternativa para explorar melhor os dados no processo de descoberta do conhecimento. Este trabalho apresenta um novo modelo para identificar relacionamentos de dados do desempenho na aprendizagem através de uma ferramenta visual interativa ao usuário. Nesse modelo é possível combinar os estilos de aprendizagem dos estudantes com estilos metodológicos das disciplinas e dados educacionais como notas, índice de aprovação e reprovação, para detectar variações de rendimento e propor modificações nas estratégias de ensino. Os dados utilizados para teste foram originados da base de dados do aproveitamento educacional dos estudantes da Escola de Engenharia Elétrica de São Carlos, Universidade de São Paulo. Information visualization deals with the use of visual techniques to interpret data and to notice relationships and patterns that support an active user to discovery new knowledge. The vast quantity of information in educational databases increases the difficulty of analysis of the student\'s performance. Educational indicators such as grade, approval and fail index should not be considered as unique performance indicators; however, these indicators along with student\'s learning styles and methodological course profile can reveal educational progress. The visualization techniques combined with statistical analysis should be considered as an alternative to data exploration in the process of knowledge discovery. This work presents a new methodology to identify the relationships that demonstrate the learning performance through the development of a visualization tool in an user\'s adaptable environment. In this new methodology it is possible to combine students and courses styles to detect variations on the courses outline and suggest changes in some methodologies and teaching strategies.The data used to test the proposed methodology came from the learning process database of the Electrical Engineering School at the University of Sao Paulo/ São Carlos/SP.

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康錦琦 and Kam-kee Kay Hong. "Visualization tools for information exploration." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31224416.

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Jansen, Yvonne. "Physical and tangible information visualization." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-00983501.

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Visualizations in the most general sense of external, physical representations of information are older than the invention of writing. Generally, external representations promote external cognition and visual thinking, and humans developed a rich set of skills for crafting and exploring them. Computers immensely increased the amount of data we can collect and process as well as diversified the ways we can represent it visually. Computer-supported visualization systems, studied in the field of information visualization (infovis), have become powerful and complex, and sophisticated interaction techniques are now necessary to control them. With the widening of technological possibilities beyond classic desktop settings, new opportunities have emerged. Not only display surfaces of arbitrary shapes and sizes can be used to show richer visualizations, but also new input technologies can be used to manipulate them. For example, tangible user interfaces are an emerging input technology that capitalizes on humans' abilities to manipulate physical objects. However, these technologies have been barely studied in the field of information visualization. A first problem is a poorly defined terminology. In this dissertation, I define and explore the conceptual space of embodiment for information visualization. For visualizations, embodiment refers to the level of congruence between the visual elements of the visualization and their physical shape. This concept subsumes previously introduced concepts such as tangibility and physicality. For example, tangible computing aims to represent virtual objects through a physical form but the form is not necessarily congruent with the virtual object. A second problem is the scarcity of convincing applications of tangible user interfaces for infovis purposes. In information visualization, standard computer displays and input devices are still widespread and considered as most effective. Both of these provide however opportunities for embodiment: input devices can be specialized and adapted so that their physical shape reflects their functionality within the system; computer displays can be substituted by transformable shape changing displays or, eventually, by programmable matter which can take any physical shape imaginable. Research on such shape-changing interfaces has so far been technology-driven while the utility of such interfaces for information visualization remained unexploited. In this thesis, I suggest embodiment as a design principle for infovis purposes, I demonstrate and validate the efficiency and usability of both embodied visualization controls and embodied visualization displays through three controlled user experiments. I then present a conceptual interaction model and visual notation system that facilitates the description, comparison and criticism of various types of visualization systems and illustrate it through case studies of currently existing point solutions. Finally, to aid the creation of physical visualizations, I present a software tool that supports users in building their own visualizations. The tool is suitable for users new to both visualization and digital fabrication, and can help to increase users' awareness of and interest in data in their everyday live. In summary, this thesis contributes to the understanding of the value of emerging physical representations for information visualization.

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Zhang, Jia Ph D. Massachusetts Institute of Technology. "Information visualization as creative nonfiction." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81082.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Comparative Media Studies, 2013. Cataloged from PDF version of thesis. "June 2013." Includes bibliographical references (p. 86-88). Information visualizations are an important means through which we communicate knowledge. By considering visualizations as data-driven narratives, this thesis uses narrative thinking as an orienting concept to support the production and evaluation of information visualizations. It proposes a set of guides that are central to future developments in the visualization of information through the analysis of historical examples and a design-based research process resulting in a system called the Royal Society Network. This thesis investigates the themes of various types of objectivity, the layering of quantitative and qualitative methods, the parallel relationship between investigation and visualization, and the graphical nature of statistical thinking. It then identifies transparency, hybridity, and investigation as the central concepts to visualization, where transparency is the communication of underlying structures to end users and is expressed through the building of interface elements as equal components to visualization, the recording and visual incorporation of usage patterns, and the representation of uncertainty; where hybridity is-in terms of both method and form-expressed through the use of quantitative and qualitative methods to drive visualizations forward and the use of multiple graphical forms to aid in understanding and providing contextual information; and where the investigative quality of visualizations is based on the coordination of grain size and axis of representation with the author's line of inquiry. by Jia Zhang. S.M.

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Danziger, Michael (Michael J. ). "Information visualization for the people." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43199.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Comparative Media Studies, 2008. Includes bibliographical references (p. 85-89). The design of information visualization, defined as the interactive, graphical presentation of data, is on the verge of a significant paradigm shift brought on by the continued maturation of the Information Age. Its traditional role as a scientific tool deployed by rigorous data analysts is in the process of expanding to include more mainstream uses and users, reflecting fundamental changes to the role of information and data in our increasingly digital society. However, visualization design theory remains rooted in earlier conceptions of its use, largely ignoring the needs of this new, non-expert audience. Accordingly, this thesis attempts to re-contextualize information visualization as a public-facing practice, and explores ways in which its design can shift from being described as "by experts, for experts" to a new characterization as "for the people." by Michael Danziger. S.M.

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Chan, Chi Kit. "Wikipedia recent changes information visualization." Thesis, University of Macau, 2015. http://umaclib3.umac.mo/record=b3335700.

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Krasnovyd, Vanessa. "Information visualization using computer animation." Thesis, Київський національний університет технологій та дизайну, 2020. https://er.knutd.edu.ua/handle/123456789/15315.

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Hong, Kam-kee Kay. "Visualization tools for information exploration /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B23273070.

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Friedrich, Carsten. "Animation in relational information visualization." Thesis, The University of Sydney, 2002. http://hdl.handle.net/2123/9288.

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In order to be able to navigate in the world without memorizing each detail, the human brain builds a mental map of its environment. The mental map is a distorted and abstracted representation of the real environment. Unimportant areas tend to be collapsed to a single entity while important landmarks are overemphasized. When working with visualizations of data we build a mental map of the data which is closely linked to the particular visualization. If the visualization changes significantly due to changes in the data or the way it is presented we loose the mental map and have to rebuild it from scratch. The purpose of the research underlying this thesis was to investigate and devise methods to create smooth transformations between visualizations of relational data which help users in maintaining or quickly updating their mental map.

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Chen, Hsinchun, Jay F. Nunamaker, Richard E. Orwig, and Olga Titkova. "Information Visualization for Collaborative Computing." IEEE, 1998. http://hdl.handle.net/10150/105495.

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Artificial Intelligence Lab, Department of MIS, University of Arizona A prototype tool classifies output from an electronic meeting system into a manageable list of concepts, topics, or issues that a group can further evaluate. In an experiment with output from GroupSystems electronic meeting system, the tool's recall ability was comparable to that of a human facilitator, but took roughly a sixth of the time.

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Perin, Charles. "Direct Manipulation for Information Visualization." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112299/document.

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La communauté de la Visualisation d'Information (Infovis) accorde une importance primordiale à la conception de techniques de visualisation nouvelles, efficaces, ou spécialisées. Alors qu'une technique de visualisation est composée à la fois de techniques de représentation et de techniques d'interaction, la conception de nouvelles techniques d'interaction pour l'Infovis passe souvent au second plan. Dans cette thèse, centrée sur l'interaction en Infovis, j'explore la conception de nouvelles techniques d'interaction afin de rendre des techniques de visualisation existantes plus efficaces, plus adaptées aux tâches utilisateur, et plus engageantes. Afin que ces techniques d'interaction soient efficaces, il est nécessaire d'abandonner les outils interactifs (widgets) standards et proposer des interfaces utilisateur allant au-delà des interfaces à fenêtres, icônes, menus et pointeur connues sous le nom d'interfaces WIMP (Window/Icon/Menu/Pointer).Dans cette thèse, je soutiens que la conception de nouvelles techniques d'interaction pour la visualisation devraient être basée sur le paradigme de la manipulation directe et sur le modèle de l'interaction instrumentale, et s'inspirer de paradigmes d'interaction établis en Interaction Homme-Machine (IHM) mais trop peu connus et reconnus en Infovis. En me basant sur plusieurs projets que j'ai menés au court de ma thèse, je démontre que la conception opportuniste d'interactions nouvelles peut rendre des techniques de visualisation plus efficaces. Ces différents projets soulèvent des problèmes de conception des techniques d'interaction, tels que le compromis entre la congruence cognitive d'une technique d'interaction et sa généricité, le problème de la conception d'interactions engageant l'utilisateur, et les mérites de l'interaction fluide et ininterrompue. Enfin, je propose un ensemble de règles dérivées des différents projets de cette thèse et je soumets des perspectives de travaux futurs, afin de contribuer au grand défi d'établir une théorie de l'interaction pour l'Infovis There is a tremendous effort from the information visualization (Infovis) community to design novel, more efficient or more specialized desktop visualization techniques. While visual representations and interactions are combined to create these visualizations, less effort is invested in the design of new interaction techniques for Infovis. In this thesis, I focus on interaction for Infovis and explore how to improve existing visualization techniques through efficient yet simple interactions. To become more efficient, the interaction techniques should reach beyond the standard widgets and Window/Icon/Menu/Pointer (WIMP) user interfaces. In this thesis, I argue that the design of novel interactions for visualization should be based on the direct manipulation paradigm, instrumental interaction, and take inspiration from advanced interactions investigated in HCI research but not well exploited yet in Infovis. I take examples from multiple projects I have designed to illustrate how opportunistic interactions can empower visualizations and I explore design implications raised by novel interaction techniques, such as the tradeoff between cognitive congruence and versatility, the problem of engaging interaction, and the benefits of seamless, fluid interaction. Finally, I provide guidelines and perspectives, addressing the grand challenge of building or consolidating the theory of interaction for Infovis

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LICAJ, AMI. "Information Visualization. Disciplina liquida intersoggettiva." Doctoral thesis, Università degli studi di Genova, 2018. http://hdl.handle.net/11567/1031290.

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Algoritmi che gestiscono bot; bot che generano fake-news; fake-news che influenzano la nostra realtà sui social network; social network che ci chiudono dentro a bolle che filtrano la nostra esperienza, conoscenza e vita analogica/digitale. Questo è ciò che accade oggi nel nostro nuovo ambiente digitale, dove la tecnologia influenza e manipola il concetto stesso di realtà e verità. Gli elementi corpo, spazio e tempo sono centrali per poter comprendere lo stato dell’esistenza dell’essere umano oggi, nell’era dell’ipercomplessità e della sempre più crescente immersività tecnologica, dove le soglie tra reale/virtuale, analogico/digitale, sono sempre più impercettibili e vanno verso una drastica sovrapposizione tra vita online/offline. I continui passaggi da uno stato dicotomico all’altro, da un ambiente all’altro, da una vita online a una offline, sono sempre più sfocati. Le sfocature, ovvero quelle fasi intermedie in cui il tutto si sovrappone, mostrano quanto il corpo, ma soprattutto la mente, non siano ancora probabilmente allenati a muoversi con disinvoltura tra un universo duale e un altro, tra i due spazi e i due tempi. A chi non è mai capitato di zoomare con le dita su una foto stampata? In questo quadro tecnologico e sociale il designer deve comprendere come poter progettare in questo nuovo ambiente digitale e come poter utilizzare le tracce dell’umanità in esso presenti (10 exabyte di dati prodotti al giorno). Le tracce – i dati – e la disciplina che li elabora per renderli fruibili, – l’Information Visualization – risultano ostili tanto quanto la società descritta. Manipolazione, soggettività, arbitrarietà, mancanza di linguaggi comuni, tutto agisce sul calo dell’etica del progettista e sulla mancata fiducia verso di esso. La ricerca, attraverso un’analisi dello stato dell’arte della disciplina liquida e del ruolo del designer, tenta di comprendere le cause di queste criticità e di questi gap, colmandoli attraverso l’elaborazione di una strategia disciplinare e l’individuazione di approcci di buon senso, variabili e modelli, validabili e testabili. La strategia mira dunque a trasformare la disciplina da soggettiva e intersoggetiva, ristabilendo un equilibrio di fiducia ed eticità.

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Xu, Yinglai. "Fluid Interactive Information Visualization: A Visualization Tool for Book Recommendation." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216941.

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The accuracy of recommender systems has been largely discussed and the user experience of the recommended systems is now becoming a new focus. Combining recommendations with information visualization (InfoVis) can be a way to improve the acceptance of the system. This thesis investigates how InfoVis can support the recommended systems, aiming at improving the enjoyment and engagement of the user experience. Three prototypes are designed to evaluate the impact of using InfoVis and fluid interactive InfoVis on user engagement and enjoyment with exploratory of recommended books. The methods of product reaction card and Likert questionnaire are used during the evaluation. Results suggest that InfoVis is a viable way to improve the engagement and enjoyment of the book recommended system and it should be further researched. Precisionen för rekommenderingssystem har diskuterats i hög grad och användarupplevelsen för rekommenderingssystem har nu blivit ett nytt fokus. Att kombinera rekommendationer med informationsvisualisering (InfoVis) är ett möjligt vis att förbättra systemets acceptans. Denna rapport undersöker hur informationsvisualisering kan kompletterarekommenderingssystemen, med fokus på att förbättra användarglädjen och engagemanget i användarupplevelsen. Tre prototyper designas i syfte att evaluera påverkan som InfoVis, och fluid interactive InfoVis, har på engagemang och användarglädje i och med exploration av rekommenderade böcker. Produktreaktionskort och Likertfrågeformulär användes under evalueringen. Resultaten indikerar att InfoVis är en möjlig lösning för att förbättra engagemang och användargläjde i samband med bokrekommendationer, och att det bör undersökasytterligare.

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Conti, Gregory John. "Countering network level denial of information attacks using information visualization." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-03232006-112827/.

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Thesis (Ph. D.)--Computing, Georgia Institute of Technology, 2006. Stasko, John, Committee Member ; Owen, Henry, Committee Member ; Merkle, Ralph, Committee Member ; Lee, Wenke, Committee Member ; Ahamad, Mustaque, Committee Chair.

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Liu, Jiayi. "Visualization of Weather Data : Temperature trend visualization." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-20969.

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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.

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Luo, Xinyan. "Supporting K-12 Teachers’ Decision Making through Interactive Visualizations : A case study to improve the usability of a real-time analytic dashboard." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289216.

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Recent research have been focusing on supporting teachers in the classroom. Such support has been shown to benefit from the development and employment of teacher-facing analytic dashboards to help them to make fast and effective decisions in regard to the in-class student learning activities. The evolving interest in this field has facilitated the emergence of the Teaching Analytics area of practice and research. However, current research efforts have indicated that the use of such dashboards usually adds another layer to the already dynamic and complex situation for teachers, which can divert their attention and can often be experienced as a disturbing factor in the class. Therefore, it is highly important to examine how such teacher-facing dashboards can be improved from the user experience perspective, in a way that would allow teachers to grasp student learning activities easily and with good perceived usability. The aim of this study is to understand how we can better design teacher-facing dashboards to more adequately support K-12 teachers in their decisions that would provide relevant in-time and student support. The study applies Nielsen's three-round iterative design approach to understand the existing usability problems and further develop the dashboard, originally designed by the company. In order to investigate users’ perceived attitude towards the redesigned dashboard, the final prototype has been evaluated through a Technology Acceptance Model questionnaire and semi-structured interviews with nine participants. As a result, the redesigned teacher-faced dashboard was proven to have a high potential to support teachers’ decisions. The efficiency of the Technology Acceptance Model was verified and put into general context on how tools for teachers should be designed for the usage in the classroom. Additionally, some major challenges for teachers with using external tools during class were discovered and are discussed in the context of a newly designed dashboard. Befintlig forskning stödjer lärare i klassrummet genom att utveckla analytiska visualiseringsverktyg (a.k.a. dashboards) som lärare kan använda för att fatta snabba och effektiva beslut med avseende på elevernas läraktiviteter. Det växande intresset för detta område har lett till framväxten av Teaching Analytics-fältet inom praktik och forskning. Forskning har dock visat att användandet av dessa verktyg vanligtvis lägger till ytterligare ett lager till den redan dynamiska och komplexa situationen för lärare, vilket kan avleda deras uppmärksamhet och ofta fungera som en störande faktor i klassrummet. Därför är det mycket viktigt att undersöka hur sådana visualiseringsverktyg för lärare kan förbättras ur användarperspektiv, på ett sätt som skulle göra det möjligt för lärare att förstå elevernas läraktiviteter enkelt och med god upplevd användbarhet. Syftet med denna studie är att förbättra användargränssnittet för ett befintligt, så att det på ett mer adekvat sätt kan stödja lärare i sina beslut och erbjuda relevant stöd till eleverna. Studien tillämpar Nielsens tre-rundors iterativa designmetod för att förstå de befintliga användbarhetsproblemen och vidareutveckla en existerande dashboard, ursprungligen utvecklad av företaget. För att undersöka användarnas inställning till det omdesignade verktyget har den slutliga prototypen utvärderats genom ett frågeformulär och semistrukturerade intervjuer med nio deltagare. Resultat visar att det omdesignade de verktyget har en stor potential för att stödja lärarnas beslut i klassrummet. Effektiviteten för Teknik Acceptant Modellen (TAM) verifieras och sattes i allmän kontext för hur olika verktyg för lärare bör utformas för användning i klassrummet. Dessutom diskuteras lärarnas stora utmaningar med att använda externa verktyg under lektioner i samband med ny verktyget.

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Bramon, Feixas Roger. "Multimodal visualization based on mutual information." Doctoral thesis, Universitat de Girona, 2013. http://hdl.handle.net/10803/119548.

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Medical imaging and 3D volumetric visualization are a standard routine for patient diagnosis and treatment. Multimodal visualization plays an important role in medical diagnosis and treatment, because it makes findings possible that might be missed when each modality is considered separately. Despite the advantages of multimodal visualization, its application in real medical context is still lacking due to the complexity of the technique. To overcome these limitations, we will focus this thesis on the automation of the fusion step and the main involved processes: the information fusion and the transfer function design. On the other hand, we will study the quality evaluation of a rendering where we will propose an objective quality metric, which can be used to assess and optimize different visualization processes. We will utilize information theory tools in order to tackle all described problems La imatge mèdica i la visualització volumètrica tridimensional és un procés bàsic pel diagnòstic i tractament de pacients. La visualització multimodal juga un paper important en el diagnòstic i tractament mèdic perquè combina diferents modalitats d’imatge i permet detectar elements que podrien passar desapercebuts si s'analitzessin les modalitats per separat. Malgrat els avantatges de la visualització multimodal, la seva aplicabilitat en el món mèdic és poc rellevant degut a la complexitat de les tècniques. Per intentar pal·liar aquestes limitacions, en aquesta tesi ens centrarem en l’automatització de procés de fusió basat en dos passos: la fusió d’informació i la definició d’una funció de transferència. Per altar banda, estudiarem com avaluar la qualitat d’una visualització proposant una mètrica de qualitat que podrà ser utilitzada per a l’assistència i optimització de diferents processos de la visualització. En aquesta tesi utilitzarem eines de teoria de la informació per afrontar els problemes descrits

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Dumeljic, Bojana. "Accessibility of Information Visualization for eParticipation." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-195344.

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Visualizing information is a large field focussed on using a visual display of information to change or facilitate the user’s thinking. However, creating and interpreting data visualizations is still seen as a task for experts and can even be seen as a daunting task by the general public. Techniques like storytelling with data aim to make visualization more accessible for these users. A fitting application of this approach is to eParticipation, which are processes during which citizens get involved in society and governmental decision making, through a digital medium. In order to enhance the access that all groups have to the progress and results of these participations, an interesting lead is the visualization of the eParticipation processes and results. This would provide participants with insights towards the effect their participation had. Additionally, it would provide decision makers with deeper insight into the opinions and views of the people that will directly be affected by their decisions. This project used the power of information visualization and storytelling with data, to design a concept that achieves this deeper insight into eParticipation results. This report describes the design, usability test and evaluation of a tool that shows the results from an eParticipation in a dashboard, while using a story format to help communicate the key insights. The goal was to accomplish a higher level of accessibility for this type of data for non data analysis experts, i.e., making the visualization easier to understand by everyone. Att visualisera information är ett stort fält fokuserat på att använda en visuell presentation av information för att ändra eller underlätta för användarens tänkande. Att skapa och tolka datavisualiseringar ses dock fortfarande som en uppgift för experter och kan även ses som en svår uppgift för allmänheten. Tekniker som berättande med data strävar efter att göra visualisering mer tillgänglig för dessa användare. Ett passande tillämpning av denna metod är e-deltagande, som är processer under vilka medborgare engagerar sig i samhället och regeringars beslutsfattande, genom ett digitalt medium. För att öka alla gruppers tillgång till framsteg och resultat av sitt deltagande, är ett intressant spår visualisering av e-deltagande processer och resultat. Detta skulle ge deltagarna insikter om effekterna av sitt deltagande. Dessutom skulle det ge beslutsfattare fördjupad insikt i åsikter och synpunkter från människor som direkt kommer att påverkas av deras beslut. Detta projekt använde kraften i informationsvisualisering och berättande med data för att utforma ett koncept som uppnår denna djupare insikt i resultat av e-deltagande. Denna rapport beskriver design, användartester och utvärdering av ett verktyg som visar resultaten från ett e-deltagande i en instrumentpanel, när en berättelse formad för att kommunicera viktiga insikter används. Målet var att åstadkomma en högre grad av tillgänglighet för denna typ av data för icke-experter, vilket gör visualisering lättare att förstå för alla.

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Sylvan, Johan. "Information visualization of consulting services statistics." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-133217.

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The aim of this masters thesis is to create a customized visualization web application of consulting services statistics. This to allow users to get an overview of time management through clear visual links between developers, customers and tasks. The design of the application is based on literature in usability and information visualization as well as a usability test. This thesis work resulted in a JavaScript based web application using the web framework CakePHP which follows a model-view-controller architectural pattern with visualization components implemented in Javascript.

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Crémilleux, Damien. "Visualization for information system security monitoring." Thesis, CentraleSupélec, 2019. http://www.theses.fr/2019CSUP0013.

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Le centre opérationnel de sécurité, SOC, est un élément central pour la sécurité des systèmes d’information. Danscette thèse, nous nous intéressons à ses limites et proposons un nouveau processus et deux outils visuels pour yrépondre. Nos contributions permettent à la fois une meilleure collaboration entre les analystes travaillant ausein des SOCs, ainsi que de faciliter visuellement le triage des événements de sécurité au sein des systèmesd’informations A security operations center, SOC, is a key element for the security of information systems. In this thesis, weexhibited the limitations of SOCs and proposed a process associated with two tools to answer them. Ourcontributions enable a better collaboration between the security analysts working in SOCs and facilitate securityevents triage thanks to visualization

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Gilson, Owen Timothy. "An ontological approach to information visualization." Thesis, Swansea University, 2008. https://cronfa.swan.ac.uk/Record/cronfa42713.

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Visualization is one of the indispensable means for addressing the rapid explosion of data and information. Although a large collection of visualization techniques have been developed over the past three decades, the majority of ordinary users have little knowledge about these techniques. Despite there being many interactive visualization tools available in the public domain or commercially, producing visualizations remains a skilled and time-consuming task. One approach for cost-effective dissemination of visualization techniques is to use captured expert knowledge for helping ordinary users generate visualizations automatically. In this work, we propose to use captured knowledge in ontologies to reduce the parameter space, providing a more effective automated solution to the dissemination of visualization techniques to ordinary users. As an example, we consider the visualization of music chart data and football statistics on the web, and aim to generate visualizations automatically from the data. The work has three main contributions: Visualisation as Mapping. We consider the visualization process as a mapping task and assess this approach from both a tree-based and graph-based perspective. We discuss techniques for automatic mapping and present a general approach for Information Perceptualisation through mapping which we call Information Realisation. VizThis: Tree-centric Mapping. We have built a tree-based mapping toolkit which provides a pragmatic solution for visualising any XML-based source data using either SVG or X3D (or potentially any other XML-based target format). The toolkit has data cleansing and data analysis features. It also allows automatic mapping through a type-constrained system (AutoMap). If the user wishes to alter mappings, the system gives the users warnings about specific problem areas so that they can be immediately corrected. SeniViz: Graph-centric Mapping. We present an ontology-based pipeline to automatically map tabular data to geometrical data, and to select appropriate visualization tools, styles and parameters. The pipeline is based on three ontologies: a Domain Ontology (DO) captures the knowledge about the subject domain being visualized; a Visual Representation Ontology (VRO) captures the specific representational capabilities of different visualization techniques (e.g. Tree Map); and a Semantic Bridge Ontology (SBO) captures specific expert-knowledge about valuable mappings between domain and representation concepts. In this way, we have an ontology mapping algorithm which can dynamically score and rank potential visualizations. We also present the results of a user study to assess the validity and effectiveness of the SemViz approach.

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Reach, Andrew McCaleb. "Smooth Interactive Visualization." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78848.

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Information visualization is a powerful tool for understanding large datasets. However, many commonly-used techniques in information visualization are not C^1 smooth, i.e. when represented as a function, they are either discontinuous or have a discontinuous first derivative. For example, histograms are a non-smooth visualization of density. Not only are histograms non-smooth visually, but they are also non-smooth over their parameter space, as they change abruptly in response to smooth change of bin width or bin offset. For large data visualization, histograms are commonly used in place of smooth alternatives, such as kernel density plots, because histograms can be constructed from data cubes, allowing histograms to be constructed quickly for large datasets. Another example of a non-smooth technique in information visualization is the commonly-used transition approach to animation. Although transitions are designed to create smooth animations, the transition technique produces animations that have velocity discontinuities if the target is changed before the transition has finished. The smooth and efficient zooming and panning technique also shares this problem---the animations produced are smooth while in-flight, but they have velocity discontinuities at the beginning and end and of the animation as well as velocity discontinuities when interrupted. This dissertation applies ideas from signal processing to construct smooth alternatives to these non-smooth techniques. To visualize density for large datasets, we propose BLOCs, a smooth alternative to data cubes that allows kernel density plots to be constructed quickly for large datasets after an initial preprocessing step. To create animations that are smooth even when interrupted, we present LTI animation, a technique that uses LTI filters to create animations that are smooth, even when interrupted. To create zooming and panning animations that are smooth, even when interrupted, we generalize signal processing systems to Riemannian manifolds, resulting in smooth, efficient, and interruptible animations. Ph. D.

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Conti, Greg. "Countering network level denial of information attacks using information visualization /." Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-03232006-112827/.

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Sivertsson, Anton. "Overviewing and VR information visualizations : How interacting with, and perceiving an information visualization in VR affects our overview of the information visualization." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210554.

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Society generates more and more data every day, and with competent ways to visualize it, we can learn new things about the world we live in. While traditional visualizations try to stay clear of 3D graphs because they are hard for a user to process without proper depth cues, VR technology allows us to better perceive 3D structures, but what happens to our overview of the data when we perceive and interact with it in 3D? 6 participants were subject to a 3D VR visualization of customer data with filtering possibilities, where they were to perform a series of short tasks as well as a more open-ended free form task. Qualitative data was gathered through extensive semi-structured interviews. Quantitative supportive data was gathered as well in the form of interaction logs, time to complete tasks and the Presence Questionnaire. After this first round of tests, feedback and data was compiled into a new version of the visualization that was then tested on seven new participants. Results showed that seeing the graph from different perspectives was important to gaining an overview of the 3D graph, but also to actively interact with the data helped participants gain an overview by digging deeper into the data. In order to dig into the data in the 3D graph, participants expressed that they would’ve liked to be able to compare subsets of the data. Vi genererar ofantliga mängder data varje dag, men utan att visualisera denna data är det inte säkert att vi lär oss någonting av den. Med detta följer även ett behov av att visualisera denna data i flera dimensioner, något som varit svårt i informationsvisualiseringar tidigare då det är svårt att representera djup på en platt skärm så att människor förstår. Med VR-teknik kan vi däremot använda detta djupseende i informationsvisualiseringar, men vad händer med vår överblick av informationen när vi ser och interagerar med den i 3D? 6 testpersoner fick interagera med en 3D-visualisering av kunddata med filtreringsmöjligheter i VR och fick i denna utföra en serie mindre uppgifter samt en större, fri uppgift. Under testet samlades kvalitativ data in i form av utförliga semi-strukturerade intervjuer och kvantitativ supportdata i form av loggar av interaktioner, tid att slutföra uppgifter samt svar från Presence Questionnaire för alla testpersoner. Åsikterna från denna testrunda användes sedan för att skapa en ny version av 3Dvisualiseringen som sedan testades på 7 nya personer enligt samma studieformat. Resultaten visade att det var viktigt att kunna se grafen från olika perspektiv för att få en överblick, såväl som att kunna aktivt filtrera och interagera med visualiseringen för att kunna gräva djupare i datan. För att kunna gräva djupare kände många testpersoner att de behövde ett sätt att enkelt kunna jämföra delmängder av datan med varandra.

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Vande, Moere Andrew Elzar. "Infoticles: information visualization using data-driven particles /." Konstanz : Hartung-Gorre Verlag, 2004. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=15388.

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40

Ren, Sandia 1978. "Ambient displays : information visualization through physical interfaces." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86497.

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Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000. Includes bibliographical references (leaves 112-113). Sandia Ren. S.B.and M.Eng.

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Wagner, Filho Jorge Alberto. "Evaluating immersive approaches to multidimensional information visualization." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/175082.

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O uso de novos recursos de display e interação para suportar a visualização imersiva de dados e incrementar o raciocínio analítico é uma tendência de pesquisa em Visualização de Informações. Neste trabalho, avaliamos o uso de ambientes baseados em HMD para a exploração de dados multidimensionais, representados em scatterplots 3D como resultado de redução de dimensionalidade. Nós apresentamos uma nova modelagem para o problema de avaliação neste contexto, levando em conta os dois fatores cuja interação determina o impacto no desempenho total nas tarefas: a diferença nos erros introduzidos ao se realizar redução de dimensionalidade para 2D ou 3D, e a diferença nos erros de percepção humana sob diferentes condições de visualização. Este framework em duas etapas oferece uma abordagem simples para estimar os benefícios de se utilizar um setup 3D imersivo para um dado conjunto de dados. Como caso de uso, os erros de redução de dimensionalidade para uma série de conjuntos de dados de votações na Câmara dos Deputados, ao se utilizar duas ou três dimensões, são avaliados por meio de uma abordagem empírica baseada em tarefas. O erro de percepção e o desempenho geral de tarefa, por sua vez, são avaliados através de estudos controlados comparativos com usuários. Comparando-se visualizações baseadas em desktop (2D e 3D) e em HMD (3D), resultados iniciais indicaram que os erros de percepção foram baixos e similares em todas abordagens, resultando em benefícios para o desempenho geral em ambas técnicas 3D A condição imersiva, no entanto, demonstrou requerer menor esforço para encontrar as informações e menos navegação, além de prover percepções subjetivas de precisão e engajamento muito maiores. Todavia, o uso de navegação por voo livre resultou em tempos ineficientes e frequente desconforto nos usuários. Em um segundo momento, implementamos e avaliamos uma abordagem alternativa de exploração de dados, onde o usuário permanece sentado e mudanças no ponto de vista só são possíveis por meio de movimentos físicos. Toda a manipulação é realizada diretamente por gestos aéreos naturais, com os dados sendo renderizados ao alcance dos braços. A reprodução virtual de uma cópia exata da mesa de trabalho do analista visa aumentar a imersão e possibilitar a interação tangível com controles e informações bidimensionais associadas. Um segundo estudo com usuários foi conduzido em comparação a uma versão equivalente baseada em desktop, explorando um conjunto de 9 tarefas representativas de percepção e interação, baseadas em literatura prévia. Nós demonstramos que o nosso protótipo, chamado VirtualDesk, apresentou resultados excelentes em relação a conforto e imersão, e desempenho equivalente ou superior em todas tarefas analíticas, enquanto adicionando pouco ou nenhum tempo extra e ampliando a exploração dos dados. The use of novel displays and interaction resources to support immersive data visualization and improve the analytical reasoning is a research trend in Information Visualization. In this work, we evaluate the use of HMD-based environments for the exploration of multidimensional data, represented in 3D scatterplots as a result of dimensionality reduction. We present a new modelling for the evaluation problem in such a context, accounting for the two factors whose interplay determine the impact on the overall task performance: the difference in errors introduced by performing dimensionality reduction to 2D or 3D, and the difference in human perception errors under different visualization conditions. This two-step framework offers a simple approach to estimate the benefits of using an immersive 3D setup for a particular dataset. As use case, the dimensionality reduction errors for a series of roll calls datasets when using two or three dimensions are evaluated through an empirical task-based approach. The perception error and overall task performance are assessed through controlled comparative user studies. When comparing desktop-based (2D and 3D) with an HMD-based (3D) visualization, initial results indicated that perception errors were low and similar in all approaches, resulting in overall performance benefits in both 3D techniques. The immersive condition, however, was found to require less effort to find information and less navigation, besides providing much larger subjective perception of accuracy and engagement. Nonetheless, the use of flying navigation resulted in inefficient times and frequent user discomfort In a second moment, we implemented and evaluated an alternative data exploration approach where the user remains seated and viewpoint change is only realisable through physical movements. All manipulation is done directly by natural mid-air gestures, with the data being rendered at arm’s reach. The virtual reproduction of an exact copy of the analyst’s desk aims to increase immersion and enable tangible interaction with controls and two dimensional associated information. A second user study was carried out comparing this scenario to a desktop-based equivalent, exploring a set of 9 representative perception and interaction tasks based on previous literature. We demonstrate that our prototype setup, named VirtualDesk, presents excellent results regarding user comfort and immersion, and performs equally or better in all analytical tasks, while adding minimal or no time overhead and amplifying data exploration.

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Costigan, John A. "Applying Information Visualization Techniques to Visual Debugging." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/33633.

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In the arena of software development, implementing a software design (no matter how perfect the design) is rarely done right the first time. Consequently, debugging one's own (or someone else's) software is inevitable, and tools that assist in this often-arduous task become very important with respect to reducing the cost of debugging as well as the cost of the software life cycle as a whole. Many tools exist with this aim, but all are lacking in a key area: information visualization. Applying information visualization techniques such as zooming, focus and context, or graphical representation of numeric data may enhance the visual debugging experience. To this end, drawing data structures as graphs is potentially a step in the right direction, but more must be done to maximize the value of time spent debugging and to minimize the actual amount of time spent debugging. This thesis will address some information visualization techniques that may be helpful in debugging (specifically with respect to visual debugging) and will present the results of a small pilot study intended to illustrate the potential value of such techniques. Master of Science

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Park, Albert. "Intended Use Evaluation Approach for Information Visualization." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/36080.

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Information visualization is applied in many fields to gain faster insights with lighter user cognitive loads in analyzing large sets of data. As more products are being introduced each year, how can one select the most effective tool or representation form for the task? There are a number of information visualization evaluation methods currently available. However, these evaluation methods are often limited by the appropriateness of the tool for a given domain since they are not evaluating according to tools' intended use. Current methods conduct evaluations in a laboratory environment with "benchmark" tasks and often with field data sets not aligned with the intended use of the tools. The absence of realistic data sets and routine tests reduces the effectiveness of the evaluation in terms of the appropriateness of the tool for a given domain. Intended use evaluation approach captures the key activities that will use the visual technology to calibrate the evaluation criteria toward these first-order needs. This research thesis presents the results from an investigation into an intended use evaluation approach and its effectiveness of measuring domain specific information visualization tools. In investigating the evaluation approach, criteria for the intelligence analysis community have been developed for demonstration purposes. While the observations from this research are compelling for the intelligence community, the principles of the evaluation approach should apply to a wider range of visualization technologies. All the design rationale and processes were captured in this thesis. This thesis presents a design process of developing criteria and measuring five intelligence analysis visual analytic tools. The study suggests that in selecting and/or evaluating visual analytic tools, a little up front effort to analyze key activities regarding the domain field will be beneficial. Such analysis can substantially reduce evaluation time and necessary effort throughout a longer period of time. Master of Science

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Lai, Yuchen. "Augmented Reality Visualization of Building Information Model." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu149263273982056.

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Whitaker, Robert Bruce. "Applying Information Visualization to Computer Security Applications." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/636.

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This thesis presents two phases of research in applying visualization to network security challenges. The first phase included discovering the most useful and powerful features in existing computer security visualizations and incorporating them into the AdviseAid visualization platform, an existing software package. The incorporation of such a complete feature set required novel resolution of software engineering, human factors, and computer graphics issues. We also designed additional novel features, such as plugin interfaces, allowing for rapid prototyping and experimentation with novel visualization features and capabilities. The second phase of the research focused on the development of novel visualization techniques themselves. These novel visualizations were designed and created within AdviseAid to demonstrate that the features of AdviseAid are functional and helpful in the development process, as well as to be effective in the analysis of computer networks in their own right.

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De, Roberto Paola. "Information visualization: from petroglyphs to CoDe Graphs." Doctoral thesis, Universita degli studi di Salerno, 2018. http://hdl.handle.net/10556/3083.

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2016 - 2017 Data visualization concerns the communication of data through visual representations and techniques. It aims at enhancing perception and support data-driven decision making so enabling insights otherwise hard to achieve. A good visualization of data makes it possible to identify patterns and enables better understanding of phenomena. In other words, data visualization is related to an innate human ability to quickly comprehend, discern and convert patterns into useful and usable information. Humans have used visual graphical representations as early as 35.000 B.C., through cave drawings. Indeed, human ancestors already reasoned in terms of models or schemata: the visual representation of information is an ancient concept, as witnessed by the rock carvings found. Over the centuries, information visualization has evolved to take into account the changing human needs and its use has become more and more conscious. The first data visualization techniques have been developed to observe and represent physical quantities, geography and celestial positions. Successively, the combined use of euclidean geometry and algebra improved accuracy and complexity of information representation, in different fields, such as astronomy, physics and engineering. Finally, in the last century most modern forms of data representations were invented: starting from charts, histograms, and graphs up to high dimensional data, and dynamic and interactive visualizations of temporal data [41]. Nowadays, the huge amount of information enables more precise interpretation of phenomena so fostering the adoption of infographic techniques, in particular, for supporting managerial decision-making in the business area... [edited by author] XVI n.s.

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Streit, Alexander. "Encapsulation and abstraction for modeling and visualizing information uncertainty." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/16963/1/Alexander_Streit_Thesis.pdf.

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Information uncertainty is inherent in many real-world problems and adds a layer of complexity to modeling and visualization tasks. This often causes users to ignore uncertainty, especially when it comes to visualization, thereby discarding valuable knowledge. A coherent framework for the modeling and visualization of information uncertainty is needed to address this issue In this work, we have identified four major barriers to the uptake of uncertainty modeling and visualization. Firstly, there are numerous uncertainty modeling tech- niques and users are required to anticipate their uncertainty needs before building their data model. Secondly, parameters of uncertainty tend to be treated at the same level as variables making it easy to introduce avoidable errors. This causes the uncertainty technique to dictate the structure of the data model. Thirdly, propagation of uncertainty information must be manually managed. This requires user expertise, is error prone, and can be tedious. Finally, uncertainty visualization techniques tend to be developed for particular uncertainty types, making them largely incompatible with other forms of uncertainty information. This narrows the choice of visualization techniques and results in a tendency for ad hoc uncertainty visualization. The aim of this thesis is to present an integrated information uncertainty modeling and visualization environment that has the following main features: information and its uncertainty are encapsulated into atomic variables, the propagation of uncertainty is automated, and visual mappings are abstracted from the uncertainty information data type. Spreadsheets have previously been shown to be well suited as an approach to visu- alization. In this thesis, we devise a new paradigm extending the traditional spreadsheet to intrinsically support information uncertainty.Our approach is to design a framework that integrates uncertainty modeling tech- niques into a hierarchical order based on levels of detail. The uncertainty information is encapsulated and treated as a unit allowing users to think of their data model in terms of the variables instead of the uncertainty details. The system is intrinsically aware of the encapsulated uncertainty and is therefore able to automatically select appropriate uncertainty propagation methods. A user-objectives based approach to uncertainty visualization is developed to guide the visual mapping of abstracted uncertainty information. Two main abstractions of uncertainty information are explored for the purpose of visual mapping: the Unified Uncertainty Model and the Dual Uncertainty Model. The Unified Uncertainty Model provides a single view of uncertainty for visual mapping, whereas the Dual Uncertainty Model distinguishes between possibilistic and probabilistic views. Such abstractions provide a buffer between the visual mappings and the uncertainty type of the underly- ing data, enabling the user to change the uncertainty detail without causing the visual- ization to fail. Two main case studies are presented. The first case study covers exploratory and forecasting tasks in a business planning context. The second case study inves- tigates sensitivity analysis for financial decision support. Two minor case studies are also included: one to investigate the relevancy visualization objective applied to busi- ness process specifications, and the second to explore the extensibility of the system through General Purpose Graphics Processor Unit (GPGPU) use. A quantitative anal- ysis compares our approach to traditional analytical and numerical spreadsheet-based approaches. Two surveys were conducted to gain feedback on the from potential users. The significance of this work is that we reduce barriers to uncertainty modeling and visualization in three ways. Users do not need a mathematical understanding of the uncertainty modeling technique to use it; uncertainty information is easily added, changed, or removed at any stage of the process; and uncertainty visualizations can be built independently of the uncertainty modeling technique.

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48

Streit, Alexander. "Encapsulation and abstraction for modeling and visualizing information uncertainty." Queensland University of Technology, 2008. http://eprints.qut.edu.au/16963/.

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Information uncertainty is inherent in many real-world problems and adds a layer of complexity to modeling and visualization tasks. This often causes users to ignore uncertainty, especially when it comes to visualization, thereby discarding valuable knowledge. A coherent framework for the modeling and visualization of information uncertainty is needed to address this issue In this work, we have identified four major barriers to the uptake of uncertainty modeling and visualization. Firstly, there are numerous uncertainty modeling tech- niques and users are required to anticipate their uncertainty needs before building their data model. Secondly, parameters of uncertainty tend to be treated at the same level as variables making it easy to introduce avoidable errors. This causes the uncertainty technique to dictate the structure of the data model. Thirdly, propagation of uncertainty information must be manually managed. This requires user expertise, is error prone, and can be tedious. Finally, uncertainty visualization techniques tend to be developed for particular uncertainty types, making them largely incompatible with other forms of uncertainty information. This narrows the choice of visualization techniques and results in a tendency for ad hoc uncertainty visualization. The aim of this thesis is to present an integrated information uncertainty modeling and visualization environment that has the following main features: information and its uncertainty are encapsulated into atomic variables, the propagation of uncertainty is automated, and visual mappings are abstracted from the uncertainty information data type. Spreadsheets have previously been shown to be well suited as an approach to visu- alization. In this thesis, we devise a new paradigm extending the traditional spreadsheet to intrinsically support information uncertainty.Our approach is to design a framework that integrates uncertainty modeling tech- niques into a hierarchical order based on levels of detail. The uncertainty information is encapsulated and treated as a unit allowing users to think of their data model in terms of the variables instead of the uncertainty details. The system is intrinsically aware of the encapsulated uncertainty and is therefore able to automatically select appropriate uncertainty propagation methods. A user-objectives based approach to uncertainty visualization is developed to guide the visual mapping of abstracted uncertainty information. Two main abstractions of uncertainty information are explored for the purpose of visual mapping: the Unified Uncertainty Model and the Dual Uncertainty Model. The Unified Uncertainty Model provides a single view of uncertainty for visual mapping, whereas the Dual Uncertainty Model distinguishes between possibilistic and probabilistic views. Such abstractions provide a buffer between the visual mappings and the uncertainty type of the underly- ing data, enabling the user to change the uncertainty detail without causing the visual- ization to fail. Two main case studies are presented. The first case study covers exploratory and forecasting tasks in a business planning context. The second case study inves- tigates sensitivity analysis for financial decision support. Two minor case studies are also included: one to investigate the relevancy visualization objective applied to busi- ness process specifications, and the second to explore the extensibility of the system through General Purpose Graphics Processor Unit (GPGPU) use. A quantitative anal- ysis compares our approach to traditional analytical and numerical spreadsheet-based approaches. Two surveys were conducted to gain feedback on the from potential users. The significance of this work is that we reduce barriers to uncertainty modeling and visualization in three ways. Users do not need a mathematical understanding of the uncertainty modeling technique to use it; uncertainty information is easily added, changed, or removed at any stage of the process; and uncertainty visualizations can be built independently of the uncertainty modeling technique.

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Yang, Jing. "A General Framework for Multi-Resolution Visualization." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-050505-113345/.

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Dissertation (Ph.D.) -- Worcester Polytechnic Institute. Keywords: Multi-Dimensional Visualization; High-Dimensional Data Set; Information Visualization; Framework; Visualization; Multi-Resolution. Includes bibliographical references (p. 172-186).

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McQuaid, Michael J., Thian-Huat Ong, Hsinchun Chen, and Jay F. Nunamaker. "Multidimensional scaling for group memory visualization." Elsevier, 1999. http://hdl.handle.net/10150/105458.

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Artificial Intelligence Lab, Department of MIS, University of Arizona We describe an attempt to overcome information overload through information visualization â in a particular domain, group memory. A brief review of information visualization is followed by a brief description of our methodology. We . discuss our system, which uses multidimensional scaling MDS to visualize relationships between documents, and which . we tested on 60 subjects, mostly students. We found three important and statistically significant differences between task performance on an MDS-generated display and on a randomly generated display. With some qualifications, we conclude that MDS speeds up and improves the quality of manual classification of documents and that the MDS display agrees with subject perceptions of which documents are similar and should be displayed together.

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Dissertations / Theses on the topic 'Visualization of educational information'

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