Rozprawy doktorskie na temat „Dynamic visualizations”
Kliknij ten link, aby zobaczyć inne rodzaje publikacji na ten temat: Dynamic visualizations.
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych rozpraw doktorskich naukowych na temat „Dynamic visualizations”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.
1
Mote, Kevin Dean. "Fast point-feature label placement for dynamic visualizations". Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Fall2007/k_mote_111307.pdf.
Pełny tekst źródła
2
Stenlund, Jörgen. "Travelling through time : Students’ interpretation of evolutionary time in dynamic visualizations". Licentiate thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-154619.
Pełny tekst źródłaStreszczenie:
Evolutionary knowledge is important to understand and address contemporary challenges such as loss of biodiversity, climate change and antibiotic resistance. An important aspect that is considered to be a threshold concept in teaching and learning about evolution is the time it involves. The history of evolution comprises several scales of magnitude, some of which are far from direct human experience and therefore difficult to understand. One way of addressing this issue is to use dynamic visualizations that represent time, for example, to facilitate teaching and learning about evolution. This thesis investigates how students’ comprehension of evolution and evolutionary time can be facilitated by visualizations in educational settings. Two different dynamic visualizations were investigated. In paper I different temporal versions of a spatio-temporal animation depicting hominin evolution were explored. The temporal information was expressed as one or several timelines along which an animated cursor moved, indicating the rate of time. Two variables, the number of timelines with different scales, and the mode of the default animated time rate (either constant throughout the animation or decreasing as the animation progressed), were combined to give four different time representations. The temporal aspects investigated were undergraduate students' ability to find events at specific times, comprehend order, comprehend concurrent events, comprehend the length of time intervals, and their ability to compare the lengths of time intervals. In paper II, perceptions and comprehension of temporal aspects in an interactive, multi-touch tabletop application, DeepTree, were investigated. This application depicts the tree of life. The focus was on the interactive aspects, especially how the zooming feature was perceived, but also on any misinterpretations associated with the interaction. The same temporal aspects listed for paper I were also implicitly investigated. The findings indicate that handling the problem of large differences in scale by altering the rate of time in the visualization can facilitate perception of certain temporal aspects while, at the same time, can hinder a correct comprehension of other temporal aspects. Findings concerning DeepTree indicate that the level of interactions varies among users, and that the zooming feature is perceived in two ways, either as a movement in time or as a movement in the metaphorical tree. Several misinterpretations were observed, for example the assumption that the zooming time in the tree corresponds to real time, that there is an implicit coherent timeline along the y-axis of the tree, and that more nodes along a branch corresponds to a longer time. The research reported in this thesis supports the claim that careful choice, and informed use of visualizations matters, and that different visualizations are best suited for different educational purposesFör att kunna förstå och ta ställning till utmaningar i form av exempelvis klimatförändringar, förlust av biodiversitet och antibiotikaresistens krävs kunskap om evolution. För att förstå evolution är det i sin tur viktigt att inse betydelsen av de tidsskalor som evolutionära processer omfattar. Detta utgör inte sällan ett problem vid undervisning om evolution eftersom det rör sig om tidsskalor som sträcker sig långt bortom vad vi själva kan erfara. Tidsskalor ingår i en grupp av begrepp som kallas tröskelbegrepp. Tröskelbegrepp utmärks av att de är svåra att ta till sig, men när väl förståelse uppnås så innebär det en radikal och permanent förändring av hur ett ämnesinnehåll, exempelvis evolution, betraktas. Av den anledningen är de också ”enkelriktade” i meningen att den nya förståelsen är bestående Ett sätt att bemöta problemen med att förstå tidsskalor av varierande storlekar är att använda dynamiska visualiseringar. Denna avhandling handlar just om hur elevers förståelse av evolution med avseende på tiden kan underlättas genom visualiseringar i undervisning. Avhandlingen baseras på två studier som var och en belyser evolutionär tid på olika sätt beträffande såväl innehåll som form. I den första studien undersöktes hur olika varianter av en tidsrepresentation i form av animerade tidslinjer påverkade 144 studenters förståelse av olika tidsaspekter. Representationen av tid hade två variabler, nämligen antal tidslinjer (en tidslinje respektive 3 tidslinjer med olika skalor) och hastighet för animationen av tidsförloppet (konstant hastighet respektive avtagande hastighet när animationen närmade sig nutid). De två variablerna kombinerades för att ge fyra olika varianter av tidsrepresentation. I studien jämfördes varianterna genom att undersöka studenters förmåga kring olika tidsaspekter; hitta händelser vid specifika tider, uppfatta ordning på händelser, uppfatta samtidiga händelser, uppfatta längden på ett tidsintervall och jämföra längden av två tidsintervall. I den andra studien undersöktes uppfattningar och förståelse av tidsmässiga aspekter hos 10 gymnasieelever med utgångspunkt från det interaktiva multi-touch-bordet ”DeepTree”. Det är en interaktiv visualisering av livets träd, det vill säga de fylogenetiska sambanden mellan organismer på jorden. I denna studie fokuserades de interaktiva aspekterna av visualiseringen, särskilt kring hur zoomfunktionen uppfattades av elever men också vilka missuppfattningar som var kopplade till interaktioner. Även tidsaspekterna från den första studien undersöktes. Resultaten från den första studien visar att det under vissa omständigheter kan vara en fördel att variera det animerade tidsflödet, till exempel genom att hastigheten på tidsflödet i animationen avtar under en speciellt händelserik period som behöver granskas noggrannare. Under andra omständigheter kan det däremot vara olämpligt att variera hastigheten för den animerade tiden eftersom det försvårar bedömningen av storleken på, och jämförelsen av, tidsintervall. Det är alltså viktigt att lärare är medvetna om vilken, eller vilka, tidsaspekter som är centrala i den specifika lärandesituationen. Resultaten från den andra studien visar två olika sätt att uppfatta zoomfunktionen när den används i applikationen DeepTree; antingen som en rörelse i tid eller som en rörelse i det metaforiska trädet. Flera missuppfattningar av interaktionen observerades hos eleverna. Till exempel tolkade en del elever den tid det tog att zooma i trädet som att det motsvarade hur lång tid som förflöt mellan olika evolutionära händelser. Ett antal elever verkade anta att det finns en implicit linjär tidslinje längs y-axeln på trädet, och att ju fler grendelningar som fanns längs en gren desto längre tid motsvarade grenen. Generellt är de flesta tidsaspekter svåra att uppfatta för användare av DeepTree. Evolutionära träd av denna typ är dock främst gjorda för att illustrera släktskapsförhållanden, men de tidsmässiga aspekterna skulle kunna förbättras. Applikationer av den typ som DeepTree utgör har potential att erbjuda goda möjligheter till lärande även beträffande evolutionär tid men hänsyn behöver då tas just till hur tidsaspekter beskrivs.
3
Jacobsson, Johan Lars Henrik. "3D-dynamic visualization of complex molecular cell biology processes : 1-year university students' understanding of visualizations of signal transduction". Thesis, Karlstad University, Faculty of Technology and Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-3185.
Pełny tekst źródłaStreszczenie:
This study deals with the use of 3D-dynamic visualizations for teaching complex molecular cell biology concepts. The focus is on signal transduction, which is a concept that constitutes an important part of biological systems. 3D-dynamic visualizations (animations) were produced and shown for a total of 24 students attending a course in molecular cell biology at Karlstad University, Sweden. Data were collected by questionnaires and interviews which were structured around the understandability and usefulness of the animations. The results indicate that animations are useful for teaching life science concepts and can serve as a complement to lectures. They are useful for visualizing continuous time-dependent processes like signal transduction chains. Several connections between students' issues of understanding and layout-issues of the animations were established. A number of implications follow from the study. Basic understanding of animations is fundamental for understanding of advanced concepts, which should be kept in mind in the design phase of production. The level of realism of different factors in animations, like molecule speed and distances, has to be set to strike a balance between conceptual understanding and scientific correctness. Visualization of 3D-structure of molecules provides an understanding of molecule and systemic function. The study reinforces the need to use visualizations in life science teaching.
Denna studie behandlar användningen av 3D-dynamiska visualiseringar för att lära ut komplexa koncept i molekylär cellbiologi. Fokus är på signalöverföring, vilket är ett koncept som är en viktig del av biologiska system. 3D-dynamiska visualiseringar producerades och visades för totalt 24 studenter närvarande på en kurs i molekylär cellbiologu vid Karlstad Universitet, Sverige. Data samlades genom frågeformulär och intervjuer strukturerade runt förståelse och användning av animeringarna. Resultaten indikerar att animeringar är användbara för att lära ut koncept inom livsvetenskap och kan vara ett komplement till lektioner. De är användbara för att visualisera kontinuerliga tidsberoende processer som signalöverföringskedjor. Flera kopplingar mellan frågeställningar för studenternas förståelse och layout-frågeställningar för animeringarna fastställdes. Studien medför ett antal följder. Grundläggande förståelse av animeringar är fundamentalt för förståelse av avancerade koncept, vilket ska betänkas vid designfasen av produktion. Nivån av realism av olika faktorer i animeringarna, som molekylhastighet och avstånd, måste sättas för få balans mellan konceptuell förståelse och vetenskaplig riktighet. Visualisering av molekylers 3D-struktur ger förståelse av molekyl och systemisk funktion. Studien stärker behovet av att använda visualisering i undervisning av livsvetenskap.
Chemistry education, kemididaktik
4
Kodali, Lata. "Extensions of Weighted Multidimensional Scaling with Statistics for Data Visualization and Process Monitoring". Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/99911.
Pełny tekst źródłaStreszczenie:
This dissertation is the compilation of two major innovations that rely on a common technique known as multidimensional scaling (MDS). MDS is a dimension-reduction method that takes high-dimensional data and creates low-dimensional versions.
Project 1: Visualizations are useful when learning from high-dimensional data. However, visualizations, just as any data summary, can be misleading when they do not incorporate measures of uncertainty; e.g., uncertainty from the data or the dimension reduction algorithm used to create the visual display. We incorporate uncertainty into visualizations created by a weighted version of MDS called WMDS. Uncertainty exists in these visualizations on the variable weights, the coordinates of the display, and the fit of WMDS. We quantify these uncertainties using Bayesian models in a method we call Informative Probabilistic WMDS (IP-WMDS). Visually, we display estimated uncertainty in the form of color and ellipses, and practically, these uncertainties reflect trust in WMDS. Our results show that these displays of uncertainty highlight different aspects of the visualization, which can help inform analysts.
Project 2: Analysis of network data has emerged as an active research area in statistics. Much of the focus of ongoing research has been on static networks that represent a single snapshot or aggregated historical data unchanging over time. However, most networks result from temporally-evolving systems that exhibit intrinsic dynamic behavior. Monitoring such temporally-varying networks to detect anomalous changes has applications in both social and physical sciences. In this work, we simulate data from models that rely on MDS, and we perform an evaluation study of the use of summary statistics for anomaly detection by incorporating principles from statistical process monitoring. In contrast to most previous studies, we deliberately incorporate temporal auto-correlation in our study. Other considerations in our comprehensive assessment include types and duration of anomaly, model type, and sparsity in temporally-evolving networks. We conclude that the use of summary statistics can be valuable tools for network monitoring and often perform better than more involved techniques.Doctor of Philosophy
In this work, two main ideas in data visualization and anomaly detection in dynamic networks are further explored. For both ideas, a connecting theme is extensions of a method called Multidimensional Scaling (MDS). MDS is a dimension-reduction method that takes high-dimensional data (all $p$ dimensions) and creates a low-dimensional projection of the data. That is, relationships in a dataset with presumably a large number of dimensions or variables can be summarized into a lower number of, e.g., two, dimensions. For a given data, an analyst could use a scatterplot to observe the relationship between 2 variables initially. Then, by coloring points, changing the size of the points, or using different shapes for the points, perhaps another 3 to 4 more variables (in total around 7 variables) may be shown in the scatterplot. An advantage of MDS (or any dimension-reduction technique) is that relationships among the data can be viewed easily in a scatterplot regardless of the number of variables in the data. The interpretation of any MDS plot is that observations that are close together are relatively more similar than observations that are farther apart, i.e., proximity in the scatterplot indicates relative similarity. In the first project, we use a weighted version of MDS called Weighted Multidimensional Scaling (WMDS) where weights, which indicate a sense of importance, are placed on the variables of the data. The problem with any WMDS plot is that inaccuracies of the method are not included in the plot. For example, is an observation that appears to be an outlier, really an outlier? An analyst cannot confirm this without further context. Thus, we created a model to calculate, visualize, and interpret such inaccuracy or uncertainty in WMDS plots. Such modeling efforts help analysts facilitate exploratory data analysis. In the second project, the theme of MDS is extended to an application with dynamic networks. Dynamic networks are multiple snapshots of pairwise interactions (represented as edges) among a set of nodes (observations). Over time, changes may appear in some of the snapshots. We aim to detect such changes using a process monitoring approach on dynamic networks. Statistical monitoring approaches determine thresholds for in-control or expected behavior that are calculated from data with no signal. Then, the in-control thresholds are used to monitor newly collected data. We applied this approach on dynamic network data, and we utilized a detailed simulation study to better understand the performance of such monitoring. For the simulation study, data are generated from dynamic network models that use MDS. We found that monitoring summary statistics of the network were quite effective on data generated from these models. Thus, simple tools may be used as a first step to anomaly detection in dynamic networks.
5
Omirou, Themis. "Levitataed interfaces - with sound : exploring the use of acoustic levitation for the creation of dynamic and physical visualizations". Thesis, University of Bristol, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738242.
Pełny tekst źródła
6
Kühl, Tim [Verfasser], i Katharina [Akademischer Betreuer] Scheiter. "Optimizing Learning with Dynamic and Static Visualizations to Foster Understanding in the Natural Sciences / Tim Kühl ; Betreuer: Katharina Scheiter". Tübingen : Universitätsbibliothek Tübingen, 2011. http://d-nb.info/1162698977/34.
Pełny tekst źródła
7
Li, Zhaoyi, i n/a. "Analysis and Design of Virtual Reality Visualization for a Micro Electro Mechanical Systems (MEMS) CAD Tool". Griffith University. School of Information and Communication Technology, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060731.121340.
Pełny tekst źródłaStreszczenie:
Since the proliferation of CAD tools, visualizations have gained importance.. They provide invaluable visual feedback at the time of design, regardless whether it is fbi civil engineering or electronic circuit design-layout. Typically dynamic visualizations are produced in a two phase process: the calculation of positions and rendering of the image and its presentation as an animated video clip. This is a slow process that is unsuitable fbr interactive CAD visualizations, because the former two require finite element analysis Faster hardware eases the problem, but does not overcome it, because the algorithms are still too slow. Our MEMS CAD project works towards methods and techniques that are suitable for interactive design, with faster methods. The purpose of this PhD thesis is to contribute to the design of an interactive virtual prototyping of Micro Electro Mechanical Systems (MEMS) This research comprises the analysis of the visualization techniques that are appropriate for these tasks and identifying the difficulties that need to be overcome to be able to offer a MEMS design engineer a meaningful and interactive CAD design environment Such a VR-CAD system is being built in our research group with many participants in the team. Two particular problems are being addressed by presenting algorithms for truthful VR visualization methods: one is for displaying objects that are different in size on the computer screen. The other is modelling unsynchronized motion dynamics, that is different objects moving simultaneously at very high and vety low speed, by proposing stroboscopic simulation to present their dynamics on the screen They require specific size scaling and time scaling and filtering. It is these issues and challenges which make the design of a MEMS CAD tool different from other CAD tools. In the thesis I present algorithms for displaying animated virtual reality for MEMS virtual prototyping in a physically truthful way by using the simulated stroboscopic illumination to filter animated images to make it possible to show unsynchronized motion.. A scaling method was used to show or hide objects which cannot be shown simultaneously on the computer screen because of their large difference in size. The visualization of objects being designed and their animations is done with much consideration of visual perception and computer capability, which is rising attention, but not too often mentioned in the visualization domain.
8
Li, Zhaoyi. "Analysis and Design of Virtual Reality Visualization for a Micro Electro Mechanical Systems (MEMS) CAD Tool". Thesis, Griffith University, 2005. http://hdl.handle.net/10072/366361.
Pełny tekst źródłaStreszczenie:
Since the proliferation of CAD tools, visualizations have gained importance.. They provide invaluable visual feedback at the time of design, regardless whether it is fbi civil engineering or electronic circuit design-layout. Typically dynamic visualizations are produced in a two phase process: the calculation of positions and rendering of the image and its presentation as an animated video clip. This is a slow process that is unsuitable fbr interactive CAD visualizations, because the former two require finite element analysis Faster hardware eases the problem, but does not overcome it, because the algorithms are still too slow. Our MEMS CAD project works towards methods and techniques that are suitable for interactive design, with faster methods. The purpose of this PhD thesis is to contribute to the design of an interactive virtual prototyping of Micro Electro Mechanical Systems (MEMS) This research comprises the analysis of the visualization techniques that are appropriate for these tasks and identifying the difficulties that need to be overcome to be able to offer a MEMS design engineer a meaningful and interactive CAD design environment Such a VR-CAD system is being built in our research group with many participants in the team. Two particular problems are being addressed by presenting algorithms for truthful VR visualization methods: one is for displaying objects that are different in size on the computer screen. The other is modelling unsynchronized motion dynamics, that is different objects moving simultaneously at very high and vety low speed, by proposing stroboscopic simulation to present their dynamics on the screen They require specific size scaling and time scaling and filtering. It is these issues and challenges which make the design of a MEMS CAD tool different from other CAD tools. In the thesis I present algorithms for displaying animated virtual reality for MEMS virtual prototyping in a physically truthful way by using the simulated stroboscopic illumination to filter animated images to make it possible to show unsynchronized motion.. A scaling method was used to show or hide objects which cannot be shown simultaneously on the computer screen because of their large difference in size. The visualization of objects being designed and their animations is done with much consideration of visual perception and computer capability, which is rising attention, but not too often mentioned in the visualization domain.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Information and Communication Technology
Full Text
9
Abdelsadek, Youcef. "Triangle packing for community detection : algorithms, visualizations and application to Twitter's network". Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0310.
Pełny tekst źródłaStreszczenie:
De nos jours, nous générons une quantité immensément grande de données juste en accomplissant nos simples tâches quotidiennes. L'analyse de ces données soulève des challenges ardus. Dans cette thèse, nous nous intéressons à deux aspects des données relationnelles. En premier lieu, nous considérons les données relationnelles dans lesquelles les relations sont pondérées. Un exemple concret serait le nombre commun de suiveurs entre deux utilisateurs de Twitter. Dans un deuxième temps, nous abordons le cas dynamique de ces données qui est inhérent à leur nature. Par exemple, le nombre de suiveurs communs pourrait changer au fil du temps. Dans cette thèse nous utilisons les graphes pour modéliser ces données qui sont à la fois complexes et évolutives. Les travaux de cette thèse s'articulent aussi autour de la détection de communautés pour les graphes pondérés et dynamiques. Pour un utilisateur expert, l'identification de ces communautés pourrait l'aider à comprendre la sémantique sous-jacente à la structure du graphe. Notre hypothèse repose sur l'utilisation des triangles comme ossature pour la détection de communautés. Cela nous a amenés à proposer plusieurs algorithmes : Séparation et évaluation, recherche gloutonne, heuristiques et algorithme génétique sont proposés. En se basant sur cet ensemble de triangles, nous proposons un algorithme de détection de communautés, appelé Tribase. L'idée conductrice de cet algorithme est de comparer les poids des communautés, permettant aux communautés dominantes d'acquérir plus de membres. Les résultats de l'étude comparative sur le benchmark LFR montrent que l'algorithme que nous proposons parvient à détecter les communautés dans les graphes dans lesquels une structure de communautés existe. De plus, l'applicabilité de notre algorithme a été testée sur des données réelles du projet ANR Info-RSN. Dans l'optique d'accompagner l'utilisateur expert dans son processus d'acquisition de l'information, une application visuelle et interactive a été implémentée. NLCOMS (Nœud-Lien et COMmunautéS) propose une panoplie de vues synchronisées pour la représentation de l'information. Par ailleurs, nous proposons dans cette thèse un algorithme de détection de communautés pour les graphes pondérés et dynamiques, appelé Dyci. Dyci permet de gérer les différents scénarios de mise à jour possibles de la structure du graphe. L'idée principale de Dyci est de guetter au cours du temps l'affaiblissement d'une communauté (en termes de poids) dans le but de reconsidérer localement sa place dans la structure, évitant ainsi une réindentification globale des communautés. Une étude comparative a été menée montrant que l'algorithme que nous proposons offre un bon compromis entre la solution obtenue et le temps de calcul. Finalement, l'intégration dans NLCOMS des visualisations adéquates pour la variante dynamique a été effectuéeRelational data in our society are on a constant increasing, rising arduous challenges. In this thesis, we consider two aspects of relational data. First, we are interested in relational data with weighted relationship. As a concrete example, relationships among Twitter's users could be weighted with regard to their shared number of followers. The second aspect is related to the dynamism which is inherent to data nature. As an instance, in the previous example the number of common followers between two Twitter's users can change over time. In order to handle these complex and dynamic relational data, we use the modelling strength of graphs. Another facet considered in this thesis deals with community identification on weighted and dynamic graphs. For an analyst, the community detection might be helpful to grasp the semantic behind the graph structure. Our assumption relies on the idea to use a set of disjoint pairwise triangles as a basis to detect the community structure. To select these triangles, several algorithms are proposed (i.e., branch-and-bound, greedy search, heuristics and genetic algorithm). Thereafter, we propose a community detection algorithm, called Tribase. In the latter, the weights of communities are compared allowing dominant communities to gain in size. Tribase is compared with the well-known LFR benchmark. The results show that Tribase identifies efficiently the communities while a community structure exists. Additionally, to asset Tribase on real-world data, we consider social networks data, especially Twitter's data, of the ANR-Info-RSN project. In order to support the analyst in its knowledge acquisition, we elaborate a visual interactive approach. To this end, an interactive application, called NLCOMS is introduced. NLCOMS uses multiple synchronous views for visualizing community structure and the related information. Furthermore, we propose an algorithm for the identification of communities over time, called Dyci. The latter takes advantage from the previously detected communities. Several changes' scenarios are considered like, node/edge addition, node/edge removing and edge weight update. The main idea of the proposed algorithm is to track whether a part of the weighted graph becomes weak over time, in order to merge it with the "dominant" neighbour community. In order to assess the quality of the returned community structure, we conduct a comparison with a genetic algorithm on real-world data of the ARN-Info-RSN project. The conducted comparison shows that Dyci algorithm provides a good trade-off between efficiency and consumed time. Finally, the dynamic changes which occur to the underlying graph structure can be visualized with NLCOMS which combines physical an axial time to fulfil this need
10
Ben, Mahfoudh Hatem. "The memorization of tactical soccer scenes : the effect of visuospatial abilities, expertise and instructional design". Thesis, Valenciennes, Université Polytechnique Hauts-de-France, 2022. http://www.theses.fr/2022UPHF0019.
Pełny tekst źródłaStreszczenie:
L'utilisation de visualisations dynamiques telles que les animations, les vidéos et laréalité virtuelle pour l'entrainement et l'amélioration des performances des joueurs dans le domaine sportif et, en particulier dans le football, ne cesse de croitre. Cependant, l'efficacité pédagogique de ces supports enrichis en informations selon les caractéristiques des apprenants n'est pas encore entièrement exploitée. Alors que certaines caractéristiques telles que le niveau d'expertise des athlètes ont été largement étudiées, d'autres caractéristiques telles que les capacités visuospatiales (CVS) ont reçu jusqu'à présent peu d'attention et sont encore négligées. Dans le but d'améliorer la communication et l'apprentissage a l'aide des visualisations dynamiques, cette thèse vise à examiner l'effet des CVS, de l’expertise et du design pédagogique sur la mémorisation des scènes tactiques de football. Les principaux résultats ont révélé que : (i) les sujets (experts et novices) a hautes CVS étaient mieux équipés que les sujets à faibles CVS pour apprendre les plans tactiques a partir des visualisations dynamiques. (ii) les novices bénéficiaient plus de leurs CVS que les experts, confirmant que les CVS deviennent moins importantes lorsque les connaissances préalables des apprenants augmentent. (iii) l'augmentation du niveau de réalisme ou de dynamisme des visualisations dynamiques entravait l'efficacité de l'apprentissage tactique, en particulier pour les sujets a faible CVS. Les résultats incitent les acteurs du sport a considérer les CVS en plus du niveau d'expertise et a sélectionner les designs pédagogiques appropries pour optimiser l'apprentissage à partir des visualisations dynamiques dans les sports d'équipeThe use of dynamic visualizations such as animations, videos and virtual reality for training and improving athletes’ performance in the sport field and, particularly in soccer, keeps growing. However, the instructional effectiveness of these informationenriched supports according to learners' characteristics remains not yet fully exploited. While some characteristics such as athletes’ expertise have been widely studied, other characteristics such as individuals' visuospatial abilities (VSA) have received little attention so far and are still neglected. With the aim to improve communication and learning sessions using dynamic visualizations this thesis aims at examining the effect of VSA, expertise and instruction design on the memorization of dynamic soccer tactics. The main results revealed that: (i) participants (experts and novices) with high-VSA were better-equipped than participants with low-VSA to memorize tactical plans from dynamic visualizations. (ii) novices benefited more from VSA than experts, confirming that VSA become less important when learners' prior knowledge increases. (iii) increasing the level of realism or dynamism of dynamic visualizations hindered tactical learning effectiveness, especially for learners with low-VSA. Results urge sport stakeholders to consider VSA in addition to the level of expertise and to select the appropriate instructional design to optimize learning from dynamic visualizations in team sports
11
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.
Pełny tekst źródłaStreszczenie:
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.
12
Méndez, Édgar. "Effective Visualization of Magnetization Dynamics". Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-372080.
Pełny tekst źródłaStreszczenie:
Simulations on magnetization dynamics are of great interest on current research. Unlike computational fluid dynamics, magnetization dynamics has not received much attention from the visualization community. In this work a design and preliminary implementation of a visualization tool for magnetization dynamics simulations is introduced, based on methods used in the literature of the field. Although immature, the introduced design and implementation provide some advantages over some tools in use, and further development could lead to a unified and complete visualization utility.
13
Sand, Victor. "Dynamic Visualization of Space Weather Simulation Data". Thesis, Linköpings universitet, Medie- och Informationsteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-112092.
Pełny tekst źródłaStreszczenie:
The work described in this thesis is part of the Open Space project, a collaboration between Linköping University, NASA and the American Museum of Natural History. The long-term goal of Open Space is a multi-purpose, open-source scientific visualization software. The thesis covers the research and implementation of a pipeline for preparing and rendering volumetric data. The developed pipeline consists of three stages: A data formatting stage which takes data from various sources and prepares it for the rest of the pipeline, a pre-processing stage which builds a tree structure of of the raw data, and finally an interactive rendering stage which draws a volume using ray-casting. The pipeline is a fully working proof-of-concept for future development of Open Space, and can be used as-is to render space weather data using a combination of suitable data structures and an efficient data transfer pipeline. Many concepts and ideas from this work can be utilized in the larger-scale software project.
14
Jain, Gautam. "Visualization and performance of dynamic multipaging algorithms". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ32387.pdf.
Pełny tekst źródła
15
Lindhe, Alexander, i Julia Szalontai. "3D visualization of dynamic drive test data". Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176263.
Pełny tekst źródłaStreszczenie:
The modular product system of Scania CV AB provides the possibility of complete truck customization while using a limited number of interchangeable components. The high product modularity sets high demands on quality assurance of the delivered products. Geometry and layout assurance is a key factor of the quality control. Dynamic geometry assurance of trucks is accomplished by performing physical tests while measuring the movement of certain components. The results are then analysed in order to ensure that unwanted collisions does not occur during the operation of the vehicle. Test results are presented in test reports containing 2D plots of delta movements that occur at certain measurement points. Test reports are considered difficult to interpret and design mistakes have occurred due to misinterpretations. The purpose of the master thesis was to develop a 3D visualization method that can complement test reports and facilitate the understanding of test results. In this master thesis, several visualization methods were identified. The identified visualization methods were evaluated according to requirements derived from interviews held at Scania. One method was then chosen for further development. The thesis project focused on cabin movement visualization. However, the aim of the development was to create a general method that is applicable for all main components, e.g. chassis and engine. The result of the development was a visualization method including a MATLAB script and a CATIA macro. The MATLAB script filters raw test data for extreme positions of the cabin. These positions are then recalculated as transformation matrices and exported as an Excel sheet. The Excel sheet is further imported by the CATIA macro, which instantiates and positions user selected components into the previously found extreme position. The developed visualization method was then verified and confirmed of providing reliable results. Furthermore, benefits and drawbacks of the visualization method are discussed. The developed visualization method is then evaluated by the previous set requirements, showing that these are fulfilled. Even though more verification of the visualization method is suggested, it is concluded that the method can and should be implemented into the current workflow.Scania CV AB’s modulära produktsystem medför möjligheten till komplett lastbilsanpassning samtidigt som endast ett begränsat antal utbytbara komponenter används. Den höga produktmodulariteten ställer höga krav på kvalitetssäkring av de levererade produkterna. Geometri och layoutsäkring är en nyckelfaktor inom säkerhetställandet av kvaliteten. Dynamisk geometrisäkran av lastbilar utförs genom att mäta rörelser av vissa komponenter under fysiska provningar. Resultaten analyseras sedan för att säkerställa att inga oönskande kollisioner inträffar under drift av fordonet. Provresultaten presenteras i provningsrapporter i form av 2D-plottar visande deltarörelser som inträffat vid specifika mätpunkter. Provningsrapporter anses vara svårtolkade och konstruktionsmisstag har inträffat på grund av feltolkningar av dessa. Syftet med examensarbetet var att utveckla en 3D-visualiseringsmetod som kan komplettera provningsrapporter och underlätta förståelsen av provresultaten. I detta examensarbete har flera visualiseringsmetoder identifierats. De identifierade visualiseringsmetoderna utvärderades sedan enligt krav härledda från intervjuer som hölls på Scania. En metod valdes därefter för vidare utveckling. Examensarbetet inriktades mot visualisering av hyttrörelser. Målet med utvecklingen var dock att skapa en generell metod för rörelser av alla huvudkomponenter, som till exempel axlar och motor. Resultatet av utvecklingen var en visualiseringsmetod som inkluderade ett MATLAB-script samt ett CATIA-makro. MATLAB-scriptet filtrerar råtestdata för extrema positioner av hytten. Dessa positioner räknas sedan om som transformationsmatriser och exporteras til ett Excel-ark. Excel-arket importeras sedan av CATIA-makrot till CATIA, som instansierar och positionerar användarvalda komponenter i de tidigare hittade extrempositionerna. Den utvecklade visualiseringsmetoden verifieras sedan och det bekräftas att tillförlitliga resultat fås fram. Dessutom diskuteras fördelarna och nackdelarna med visualiseringmetoden. Den utvecklade visualiseringsmetoden utvärderas sedan med de tidigare ställda kraven. Utvärderingen visar att dessa uppfylls. Även om ytterligare verifiering av visualiseringsmetoden föreslås, dras slutsatsen att metoden kan och bör implementeras i det aktuella arbetsflödet.
16
Marokkey, Sajan Raphael. "Digital techniques for dynamic visualization in photomechanics". Thesis, Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B14670896.
Pełny tekst źródła
17
Salén, Filip. "Visualization of Dynamic Memory in C++ Applications". Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75286.
Pełny tekst źródłaStreszczenie:
Optimized memory management is important for a demanding application to achieve high-performance results. But un-optimized or unwanted memory behaviors can usually be difficult to detect without an overview of how memory is structured during run-time. This thesis explores real-time visualization of dynamic memory allocation for applications using the memory pool allocation technique. In the thesis, technical and graphical challenges are described together with their solutions and the design choices that were made. The final result is a program that can visualize dynamic memory management in real time, with the focus on displaying a detailed and comprehensive memory overview that preserves the level of detail over time.Optimerad minneshantering är viktig för att uppnå hög prestanda i en krävande applikation. Men att upptäcka icke optimerade eller oönskade minnesbeteenden kan vara svårt utan en visuell översikt över hur minnet är strukturerat under programmets exekvering. Denna avhandling undersöker hur dynamisk minnesallokering kan visualiseras i realtid för applikationer som använder allokeringstekniken minnes\-pool. I avhandlingen beskrivs tekniska och grafiska utmaningar tillsammans med deras lösningar och de designval som gjordes. Slutresultatet är ett program som kan visualisera dynamisk minneshantering i realtid och som fokuserar på att visa en detaljerad och omfattande minnesöversikt som bevarar detaljeringsgraden över tiden.
18
Wooding, Steven. "The visualization of yeast Golgi dynamics". Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624980.
Pełny tekst źródła
19
Huang, Xiaodi, i xhuang@turing une edu au. "Filtering, clustering and dynamic layout for graph visualization". Swinburne University of Technology, 2004. http://adt.lib.swin.edu.au./public/adt-VSWT20050428.111554.
Pełny tekst źródłaStreszczenie:
Graph visualization plays an increasingly important role in software engineering and
information systems. Examples include UML, E-R diagrams, database structures,
visual programming, web visualization, network protocols, molecular structures,
genome diagrams, and social structures.
Many classical algorithms for graph visualization have already been developed
over the past decades. However, these algorithms face difficulties in practice, such as
the overlapping nodes, large graph layout, and dynamic graph layout. In order to solve
these problems, this research aims to systematically address both algorithmic and
approach issues related to a novel framework that describes the process of graph
visualization applications. At the same time, all the proposed algorithms and
approaches can be applied to other situations as well.
First of all, a framework for graph visualization is described, along with a generic
approach to the graphical representation of a relational information source. As the
important parts of this framework, two main approaches, Filtering and Clustering, are
then particularly investigated to deal with large graph layouts effectively.
In order to filter 'noise' or less important nodes in a given graph, two new
methods are proposed to compute importance scores of nodes called NodeRank, and
then to control the appearances of nodes in a layout by ranking them.
Two novel algorithms for clustering graphs, KNN and SKM, are developed to
reduce visual complexity. Identifying seed nodes as initial members of clusters, both
algorithms make use of either the k-nearest neighbour search or a novel node
similarity matrix to seek groups of nodes with most affinities or similarities among
them. Such groups of relatively highly connected nodes are then replaced with
abstract nodes to form a coarse graph with reduced dimensions.
An approach called MMD to the layout of clustered graphs is provided using a
multiple-window�multiple-level display.
As for the dynamic graph layout, a new approach to removing overlapping nodes
called Force-Transfer algorithm is developed to greatly improve the classical Force-
Scan algorithm.
Demonstrating the performance of the proposed algorithms and approaches, the
framework has been implemented in a prototype called PGD. A number of
experiments as well as a case study have been carried out.
20
Eng, David 1978. "Combining static and dynamic data in code visualization". Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=78356.
Pełny tekst źródłaStreszczenie:
The task of developing, tuning, and debugging compiler optimizations is a difficult one which can be facilitated by software visualization. There are many characteristics of the code which must be considered when studying the kinds of optimizations which can be performed. These characteristics can include large amounts of data which would be difficult to inspect without the appropriate tools. Both static data collected at compile-time and dynamic runtime data can reveal opportunities for optimization and affect code transformations. In order to expose the behavior of such complex systems, visualizations should include as much information as possible and accommodate the different sources from which this information is acquired.This thesis presents a visualization framework designed to address these issues. The framework is based on a new, extensible language called JIL which provides a common format for encapsulating intermediate representations and associating them with compile-time and runtime data. We present new contributions which extend existing compiler and profiling frameworks, allowing them to export the intermediate languages, analysis results, and code metadata they collect as JIL documents. Visualization interfaces can then combine the JIL data from separate tools, exposing both static and dynamic characteristics of the underlying code. We present such an interface in the form of a new web-based visualizer, allowing JIL documents to be visualized online in a portable, customizable interface.
21
Wang, Ray(Ray Y. ). "A system for dynamic slicing and program visualization". Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121764.
Pełny tekst źródłaStreszczenie:
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019Cataloged from PDF version of thesis.
Includes bibliographical references (pages 54-55).
Dynamic analysis, which involves gathering information about a program as it is executing, is becoming increasingly common as reverse engineers attempt to more efficiently analyze complex software systems. In this thesis, I implement a technique called dynamic slicing, which determines how values in a program's register or memory, such as strings, are computed as a function of the program's initial state. This technique is then evaluated on sets of programs of interest to reverse engineers: string generation and string encoding/decoding algorithms. A common source of these algorithms is malware, which often employs these mechanisms to obfuscate and to make human-driven reverse engineering more difficult. In particular, malware will use Domain Generation Algorithms (DGAs) to construct seemingly randomized domain names to contact their control servers. We demonstrate that metrics and graphs produced with dynamic slicing can be successfully employed on these algorithm classes, elucidating interesting features from different families of malware and reducing the manual workload of malware reverse engineers.
by Ray Wang.
M. Eng.
M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
22
Tashakori, Niloofar. "Dynamic visualization : the significance of motion in the visualization of the architectural design model". Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/78949.
Pełny tekst źródłaStreszczenie:
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1986.MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH
Includes bibliographical references (leaves 81-85).
The visual expression of architectural ideas, specifically in the preliminary stages of design, has generally been by means of static images on two dimensional surfaces. Our perception of a building or an urban context compared to what actually is communicated by most visual tools, indicates to us that most representation media lack an essential quality, that of movement. Not until recently were we able to introduce this quality within our methods of representation. Computer graphics as a new tool for visual expression can provide us with the means to examine spatial ideas dynamically. This can increase an observer's understanding and enable designers to manipulate their ideas in a more reactive and dynamic environment. This thesis will examine the more conventional media used to convey form and space, and discuss the advantages and disadvantages associated with them. The central issue to this thesis is the aspect of movement: that motion is an essential part of spatial understanding and that of visual perception. As a base for my arguments I have chosen some theories of perception relevant to architecture, and tried to find parallels which could give rise to a better understanding of architectural form and space and to it's representation. Finally, I have looked at the state of the art in computer graphics: the difficulties involved in creating computer images, how they are being overcome and lastly the potential for visualization that computers can offer in the future.
by Niloofar Tashakori.
M.S.
23
Peng, Zhenmin. "Interactive visualization of computational fluid dynamics data". Thesis, Swansea University, 2011. https://cronfa.swan.ac.uk/Record/cronfa42757.
Pełny tekst źródłaStreszczenie:
This thesis describes a literature study and a practical research in the area of flow visualization, with special emphasis on the interactive visualization of Computational Fluid Dynamics (CFD) datasets. Given the four main categories of flow visualization methodology; direct, geometric, texture-based and feature-based flow visualization, the research focus of our thesis is on the direct, geometric and feature-based techniques. And the feature-based flow visualization is highlighted in this thesis. After we present an overview of the state-of-the-art of the recent developments in the flow visualization in higher spatial dimensions (2.5D, 3D and 4D), we propose a fast, simple, and interactive glyph placement algorithm for investigating and visualizing boundary flow data based on unstructured, adaptive resolution boundary meshes from CFD dataset. Afterward, we propose a novel, automatic mesh-driven vector field clustering algorithm which couples the properties of the vector field and resolution of underlying mesh into a unified distance measure for producing high-level, intuitive and suggestive visualization of large, unstructured, adaptive resolution boundary CFD meshes based vector fields. Next we present a novel application with multiple-coordinated views for interactive information-assisted visualization of multidimensional marine turbine CFD data. Information visualization techniques are combined with user interaction to exploit our cognitive ability for intuitive extraction of flow features from CFD datasets. Later, we discuss the design and implementation of each visualization technique used in our interactive flow visualization framework, such as glyphs, streamlines, parallel coordinate plots, etc. In this thesis, we focus on the interactive visualization of the real-world CFD datasets, and present a number of new methods or algorithms to address several related challenges in flow visualization. We strongly believe that the user interaction is a crucial part of an effective data analysis and visualization of large and complex datasets such as CFD datasets we use in this thesis. In order to demonstrate the use of the proposed techniques in this thesis, CFD domain experts reviews are also provided.
24
Halsey, Tracy S. "The visualization of strange attractors in three dimensions". Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12172008-063458/.
Pełny tekst źródła
25
Pheng, Sokhom. "Dynamic data structure analysis and visualization of Java programs". Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98768.
Pełny tekst źródłaStreszczenie:
For many years, programmers have faced the problem of reading and trying to understand other programmers' code, either to maintain it or to learn from it. Analysis of dynamic data structure usage is useful for both program understanding and for improving the accuracy of other program analyses.Data structure usage has been the target of various static techniques. Static approaches, however, may suffer from reduced accuracy in complex situations and have the potential to be overly-conservative in their approximation. An accurate, clean picture of runtime heap activity is difficult to achieve.
We have designed and implemented a dynamic heap analysis system that allows one to examine and analyze how Java programs build and modify data structures. Using a complete execution trace from a profiled run of the program, we build an internal representation that mirrors the evolving runtime data structures. The resulting series of representations can then be analyzed and visualized. This gives us an accurate representation of the data structures created and an insight into the program's behaviour. Furthermore we show how to use our approach to help understand how programs use data structures, the precise effect of garbage collection, and to establish limits on static data structure analysis.
A deep understanding of dynamic data structures is particularly important for modern, object-oriented languages that make extensive use of heap-based data structures. These analysis results can be useful for an important group of applications such as parallelization, garbage collection optimization, program understanding or improvements to other optimization.
26
Brydges, Bruce E. "Flow visualization of dynamic stall on an oscillating airfoil". Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27060.
Pełny tekst źródła
27
Sledz, Daniel A. Coomes Donald E. "A dynamic three-dimensional network visualization program for integration into cyberciege and other network visualization scenarios". Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Jun%5FSledz.pdf.
Pełny tekst źródłaStreszczenie:
Thesis (M.S. in Modeling, Virtual Environments, and Simulation (Moves))--Naval Postgraduate School, June 2007.Thesis Advisor(s): Mathias Kölsch. "June 2007." Includes bibliographical references (p. 113-116). Also available in print.
28
Sledz, Daniel A. Coomes Donald E. "A dynamic three-dimensional network visualization program for integration into cybersiege and other network visualization scenarios". Monterey, Calif. : Naval Postgraduate School, 2007. http://handle.dtic.mil/100.2/ADA470113.
Pełny tekst źródłaStreszczenie:
Thesis (M.S. in Modeling, Virtual Environments, and Simulation (Moves))--Naval Postgraduate School, June 2007."June 2007." Title from title page of PDF document (viewed on: Nov. 15, 2007). Includes bibliographical references (p. 113-116).
29
Coomes, Donald E. "A dynamic three-dimensional network visualization program for integration into cyberciege and other network visualization scenarios". Thesis, Monterey, California. Naval Postgraduate School, 2007. http://hdl.handle.net/10945/3384.
Pełny tekst źródłaStreszczenie:
Detailed information and intellectual understanding of a network's topology and vulnerabilities is invaluable to better securing computer networks. Network protocol analyzers and intrusion detection systems can provide this additional information. In particular, game-based trainers, such as CyberCIEGE, have been shown to improve the level of training and understanding of network security professionals. This thesis' objective is to enhance these applications by developing NTAV3D, or, Network Topology and Attack Visualizer (Three Dimensional). NTAV3D is a tool that displays network topology, vulnerabilities, and attacks in an interactive, three dimensional environment. This augments the design and gameplay of CyberCIEGE by increasing gameplayer interaction and data display. Additionally, NTAV3D can be expanded to provide this capability to network analysis and intrusion detection tools. Furthermore, NTAV3D expands on ideas and results from related work of the best ways to visualize network topology, vulnerabilities, and attacks. NTAV3D was created using open-source software technologies including Xj3D, X3D, Java, and XML. It is also one of the first applications to be built with only the Xj3D toolkit. Therefore, the development process allowed evaluation of these technologies, resulting in recommendations for future improvements.
30
Steiner, Lydia. "The Dynamic Epigenome". Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-119746.
Pełny tekst źródłaStreszczenie:
There is a genome in a cell, as everyone knows, but there is also an epigenome. The epigenome regulates the transcription of the underlying genome. In the last decade, it was discovered that the epigenome state and its regulation are important for differentiation and
development. Correlation studies with aging samples had led to the hypothesis that misregulation of the epigenome causes aging and cancer. Furthermore, diseases were identified which are caused by
errors in the epigenome state and its regulation.
Identification of erroneous epigenome states and misregulation requires the prior knowledge of the common state. Several studies
aim at measuring epigenome states in different organisms and cell
types and thus, provide a huge amount of data.
In this dissertation, a pipeline is developed to analyze and characterize histone modifications with respect to different cell types. Application of this pipeline is shown for a published data set of mouse consisting of data for H3K4me3, H3K27me3, and H3K9me3 measured in embryonic stem cells, embryonic fibroblasts and neuronal progenitors.
Furthermore, methods for the detection of the epigenetic patterns are
presented in this dissertation. Therefore, a segmentation method is developed to segment the genome guided by the data sets. Based on this segmentation, the epigenome states as well as epigenetic variation can be studied. Different visualization methods are developed to highlight the epigenetic patterns in the segmentation data. Application of the segmentation AND visualization methods to the mouse data set had resulted in not only colorful squares but also in biological conclusions! It demonstrate the power of the developed methods.
Although the studied data set in this dissertation contains only ordinary tissue cells, the methods are not restricted to study the reference epigenome state. Comparison of normal and disease cells as well as comparison with aged cells are possible with all of the methods.
Finally, the methods are compared based on the obtained results. It shows that all methods highlight different aspects of the data. Thus, applying all methods to the same data sets, deep insights into the epigenome in murine embryonic stem cells, embryonic fibroblasts and
neuronal progenitor cells are gained. For example, it had been found
that several mechanisms exist setting H3K4me3 marks. Furthermore, not all mechanisms are found in all cell types. Strong evidence had been
found that catalysis of H3K4me3 and H3K27me3 is coupled.
31
Maloo, Akshay. "Dynamic Behavior Visualizer: A Dynamic Visual Analytics Framework for Understanding Complex Networked Models". Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/25296.
Pełny tekst źródłaStreszczenie:
Dynamic Behavior Visualizer (DBV) is a visual analytics environment to visualize the spatial and temporal movements and behavioral changes of an individual or a group, e.g. family within a realistic urban environment. DBV is specifically designed to visualize the adaptive behavioral changes, as they pertain to the interactions with multiple inter-dependent infrastructures, in the aftermath of a large crisis, e.g. hurricane or the detonation of an improvised nuclear device. DBV is web-enabled and thus is easily accessible to any user with access to a web browser. A novel aspect of the system is its scale and fidelity. The goal of DBV is to synthesize information and derive insight from it; detect the expected and discover the unexpected; provide timely and easily understandable assessment and the ability to piece together all this information.Master of Science
32
Bladh, Thomas. "Towards an understanding of dynamics in information visualization". Licentiate thesis, Luleå : Luleå University of Technology, 2006. http://epubl.ltu.se/1402-1757/2006/28/.
Pełny tekst źródła
33
Santhanam, Anand. "MODELING, SIMULATION, AND VISUALIZATION OF 3D LUNG DYNAMICS". Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3824.
Pełny tekst źródłaStreszczenie:
Medical simulation has facilitated the understanding of complex biological phenomenon through its inherent explanatory power. It is a critical component for planning clinical interventions and analyzing its effect on a human subject. The success of medical simulation is evidenced by the fact that over one third of all medical schools in the United States augment their teaching curricula using patient simulators. Medical simulators present combat medics and emergency providers with video-based descriptions of patient symptoms along with step-by-step instructions on clinical procedures that alleviate the patient's condition. Recent advances in clinical imaging technology have led to an effective medical visualization by coupling medical simulations with patient-specific anatomical models and their physically and physiologically realistic organ deformation. 3D physically-based deformable lung models obtained from a human subject are tools for representing regional lung structure and function analysis. Static imaging techniques such as Magnetic Resonance Imaging (MRI), Chest x-rays, and Computed Tomography (CT) are conventionally used to estimate the extent of pulmonary disease and to establish available courses for clinical intervention. The predictive accuracy and evaluative strength of the static imaging techniques may be augmented by improved computer technologies and graphical rendering techniques that can transform these static images into dynamic representations of subject specific organ deformations. By creating physically based 3D simulation and visualization, 3D deformable models obtained from subject-specific lung images will better represent lung structure and function. Variations in overall lung deformations may indicate tissue pathologies, thus 3D visualization of functioning lungs may also provide a visual tool to current diagnostic methods. The feasibility of medical visualization using static 3D lungs as an effective tool for endotracheal intubation was previously shown using Augmented Reality (AR) based techniques in one of the several research efforts at the Optical Diagnostics and Applications Laboratory (ODALAB). This research effort also shed light on the potential usage of coupling such medical visualization with dynamic 3D lungs. The purpose of this dissertation is to develop 3D deformable lung models, which are developed from subject-specific high resolution CT data and can be visualized using the AR based environment. A review of the literature illustrates that the techniques for modeling real-time 3D lung dynamics can be roughly grouped into two categories: Geometrically-based and Physically-based. Additional classifications would include considering a 3D lung model as either a volumetric or surface model, modeling the lungs as either a single-compartment or a multi-compartment, modeling either the air-blood interaction or the air-blood-tissue interaction, and considering either a normal or pathophysical behavior of lungs. Validating the simulated lung dynamics is a complex problem and has been previously approached by tracking a set of landmarks on the CT images. An area that needs to be explored is the relationship between the choice of the deformation method for the 3D lung dynamics and its visualization framework. Constraints on the choice of the deformation method and the 3D model resolution arise from the visualization framework. Such constraints of our interest are the real-time requirement and the level of interaction required with the 3D lung models. The work presented here discusses a framework that facilitates a physics-based and physiology-based deformation of a single-compartment surface lung model that maintains the frame-rate requirements of the visualization system. The framework presented here is part of several research efforts at ODALab for developing an AR based medical visualization framework. The framework consists of 3 components, (i) modeling the Pressure-Volume (PV) relation, (ii) modeling the lung deformation using a Green's function based deformation operator, and (iii) optimizing the deformation using state-of-art Graphics Processing Units (GPU). The validation of the results obtained in the first two modeling steps is also discussed for normal human subjects. Disease states such as Pneumothorax and lung tumors are modeled using the proposed deformation method. Additionally, a method to synchronize the instantiations of the deformation across a network is also discussed.Ph.D.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Computer Science
34
Kennedy, Stephen James M. C. P. Massachusetts Institute of Technology. "Transforming big data into knowledge : experimental techniques in dynamic visualization". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/73818.
Pełny tekst źródłaStreszczenie:
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2012.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 122-124).
Information visualizations, especially those utilizing web-based platforms, are becoming an increasingly common medium for exchanging ideas. This emergent class of tools enabling web-based, interactive platforms for visualizing data should be considered by urban planners and designers as an opportunity to create new modes of disseminating and communicating information. This thesis provides an overview of new visualization tools: how they are being developed and combined, their applications, and their potential future uses. It also explores the implications of such tools in contexts where technology is not yet mainstream. This is illustrated through a case study of using mobile phones to gather data on the bus system in Dhaka, Bangladesh. The research draws from literature written on critical cartography, visualization, and visual culture in urban design and planning. The work first develops a best practices workflow of existing and emerging visualization tools and platforms. It then constructs prototypes of products for various audiences that illustrate the outputs of data collected on Dhaka's bus system, showcasing the potentials of these new tools and platforms.
by Stephen James Kennedy.
M.C.P.
35
O'Neill, Ryan Michael. "Implementing Dynamic Visualization of Interactive Text Streams on Mobile Devices". Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1397047473.
Pełny tekst źródła
36
Fong, Donald Brian. "A visual simulation playground for engineering dynamics". Texas A&M University, 2008. http://hdl.handle.net/1969.1/86067.
Pełny tekst źródłaStreszczenie:
Past educational studies reveal that students have difficulty making the connection between the mathematical and analytical models used to describe building
behavior and the behavior itself. This thesis examines the development and use of
visual simulation software as a tool to help students create connections between abstract mathematical models and the real world. A framework for the software was
designed and implemented, enabling students to interactively construct, analyze, and
evaluate models within a single environment. The software was tested by students in
an undergraduate dynamics course to assess its effectiveness as a learning tool. Results are presented through scenarios that demonstrate the extensibility and
flexibility
of the framework and an analysis of student responses from the Student Assessment
of Learning Gains instrument.
37
Pappu, Sravan Kumar. "Actionable Visualization of Higher Dimensional Dynamical Processes". ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/1336.
Pełny tekst źródłaStreszczenie:
Analyzing modern day's information systems that produce humongous multi-dimensional data in form of logs, traces or events that unfold over time can be tedious without adequate visualization, thereby, advocating the need for an intelligible visualization. This thesis researched and developed a visualization framework that represents multi-dimensional dynamic and temporal process data in a potentially intelligible and actionable form. A prototype showing four different views using notional malware data abstracted from Normal Sandbox behavioral traces were developed. In particular, the B-matrix view representing the DLL files used by the malware to attack a system. This representation is aimed at visualizing large data sets without losing emphasis on the process unfolding over multiple dimensions.
38
Haynes, Keith Lorenzo. "Computer graphics tools for the visualization of spacecraft dynamics". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA278615.
Pełny tekst źródłaStreszczenie:
Thesis (M.S. in Computer Science and M.S. in Engineering Science) Naval Postgraduate School, December 1993.Thesis advisor(s): I. Michael Ross. "December 1993." Includes bibliographical references. Also available online.
39
Sigfridsson, Andreas. "Multidimensional MRI of Myocardial Dynamics : Acquisition, Reconstruction and Visualization". Doctoral thesis, Linköpings universitet, Medicinsk informatik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-51489.
Pełny tekst źródłaStreszczenie:
Methods for measuring deformation and motion of the human heart in-vivo are crucial in the assessment of cardiac function. Applications ranging from basic physiological research, through early detection of disease to follow-up studies, all rely on the quality of the measurements of heart dynamics. This thesis presents new improved magnetic resonance imaging methods for acquisition, image reconstruction and visualization of cardiac motion and deformation.As the heart moves and changes shape during the acquisition, synchronization to the heart dynamics is necessary. Here, a method to resolve not only the cardiac cycle but also the respiratory cycle is presented. Combined with volumetric imaging, this produces a five-dimensional data set with two cyclic temporal dimensions. This type of data reveals unique physiological information, such as interventricular coupling in the heart in different phases of the respiratory cycle.The acquisition can also be sensitized to motion, measuring not only the magnitude of the magnetization but also a signal proportional to local velocity or displacement. This allows for quantification of the motion which is especially suitable for functional study of the cardiac deformation. In this work, an evaluation of the influence of several factors on the signal-to-noise ratio is presented for in-vivo displacement encoded imaging. Additionally, an extension of the method to acquire multiple displacement encoded slices in a single breath hold is also presented.Magnetic resonance imaging is usually associated with long scan times, and many methods exist to shorten the acquisition time while maintaining acceptable image quality. One class of such methods involves acquiring only a sparse subset of k-space. A special reconstruction is then necessary in order to obtain an artifact-free image. One family of these reconstruction techniques tailored for dynamic imaging is the k-t BLAST approach, which incorporates data-driven prior knowledge to suppress aliasing artifacts that otherwise occur with the sparse sampling. In this work, an extension of the original k-t BLAST method to two temporal dimensions is presented and applied to data acquired with full coverage of the cardio-respiratory cycles. Using this technique, termed k-t2 BLAST, simultaneous reduction of scan time and improved spatial resolution is demonstrated. Further, the loss of temporal fidelity when using the k-t BLAST approach is investigated, and an improved reconstruction is proposed for the application of cardiac function analysis.Visualization is a crucial part of the imaging chain. Scalar data, such as regular anatomical images, are straightforward to display. Myocardial strain and strain-rate, however, are tensor quantities which do not lend themselves to direct visualization. The problem of visualizing the tensor field is approached in this work by combining a local visualization that displays all degrees of freedom for a single tensor with an overview visualization using a scalar field representation of the complete tensor field. The scalar field is obtained by iterated adaptive filtering of a noise field, creating a continuous geometrical representation of the myocardial strain-rate tensor field.The results of the work presented in this thesis provide opportunities for improved imaging of myocardial function, in all areas of the imaging chain; acquisition, reconstruction and visualization.
40
Spiegel, Dana Sean 1977. "Coterie : a visualization of the conversational dynamics within IRC". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/62361.
Pełny tekst źródłaStreszczenie:
Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2001.Includes bibliographical references (leaves 95-99).
Social patterns are observable in real-world interactions as visual cues. Online, however, there are few visual cues available that can be used to see and understand social patterns. In this thesis, I suggest that many of these social patterns are still present in our interactions online in text chat; they are merely encoded in the textual interactions. This thesis presents Coterie, a visualization of the conversational dynamics of an Internet Relay Chat (IRC) channel. Through Coterie, viewers can see the social patterns that underlie the text interactions between conversants. Using the chat messages posted to an IRC channel by users, Coterie builds statistical models for individual and channel-level interaction based on existing real-world sociometric models. Coterie also automatically separates out conversations using a conversation model based on a word usage algorithm. This information is then presented to the viewer through a novel display based on models for real-world small group interaction, which allows the viewer to see historical patterns of user interaction, such as a user's verbosity, as well as channel-level patterns, such as cohesiveness. The visualization is evaluated based on how well it makes such patterns visible, and further directions for its development are presented.
Dana Sean Spiegel.
S.M.
41
Majid, Raja. "Dynamic and Static Approaches for Glyph-Based Visualization of Software Metrics". Thesis, Växjö University, School of Mathematics and Systems Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-2443.
Pełny tekst źródłaStreszczenie:
This project presents the research on software visualization techniques. We will introduce the concepts of software visualization, software metrics and our proposed visualization techniques: Static Visualization (glyphs object with static texture) and Dynamic Visualization (glyphs object with moving object). Our intent to study the existing visualization techniques for visualization of software
metrics and then proposed the new visualization approach that is more time efficient and easy to perceive by viewer. In this project, we focus on the practical aspects of visualization of multivariate dataset. This project also gives an implementation of proposed visualization techniques of software metrics. In this research based work, we have to compare practically the proposed visualization approaches. We will discuss the software development life cycle of our proposed visualization system, and we will also describe the complete software implementation of implemented software.
42
Ke, Xian 1981. "A multi-tier framework for dynamic data collection, analysis, and visualization". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28416.
Pełny tekst źródłaStreszczenie:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.Includes bibliographical references (leaves 52-53).
This thesis describes a framework for collecting, analyzing, and visualizing dynamic data, particularly data gathered through Web questionnaires. The framework addresses challenges such as promoting user participation, handling missing or invalid data, and streamlining the data interpretation process. Tools in the framework provide an intuitive way to build robust questionnaires on the Web and perform on-the-fly analysis and visualization of results. A novel 2.5-dimensional dynamic response-distribution visualization allows subjects to compare their results against others immediately after they have submitted their response, thereby encouraging active participation in ongoing research studies. Other modules offer the capability to quickly gain insight and discover patterns in user data. The framework has been implemented in a multi-tier architecture within an open-source, Java-based platform. It is incorporated into Risk Psychology Network, a research and educational project at MIT's Laboratory for Financial Engineering.
by Xian Ke.
M.Eng.
43
Borke, Lukas. "Dynamic Clustering and Visualization of Smart Data via D3-3D-LSA". Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18307.
Pełny tekst źródłaStreszczenie:
Mit der wachsenden Popularität von GitHub, dem größten Online-Anbieter von Programm-Quellcode und der größten Kollaborationsplattform der Welt, hat es sich zu einer Big-Data-Ressource entfaltet, die eine Vielfalt von Open-Source-Repositorien (OSR) anbietet. Gegenwärtig gibt es auf GitHub mehr als eine Million Organisationen, darunter solche wie Google, Facebook, Twitter, Yahoo, CRAN, RStudio, D3, Plotly und viele mehr. GitHub verfügt über eine umfassende REST API, die es Forschern ermöglicht, wertvolle Informationen über die Entwicklungszyklen von Software und Forschung abzurufen. Unsere Arbeit verfolgt zwei Hauptziele: (I) ein automatisches OSR-Kategorisierungssystem für Data Science Teams und Softwareentwickler zu ermöglichen, das Entdeckbarkeit, Technologietransfer und Koexistenz fördert. (II) Visuelle Daten-Exploration und thematisch strukturierte Navigation innerhalb von GitHub-Organisationen für reproduzierbare Kooperationsforschung und Web-Applikationen zu etablieren. Um Mehrwert aus Big Data zu generieren, ist die Speicherung und Verarbeitung der Datensemantik und Metadaten essenziell. Ferner ist die Wahl eines geeigneten Text Mining (TM) Modells von Bedeutung. Die dynamische Kalibrierung der Metadaten-Konfigurationen, TM Modelle (VSM, GVSM, LSA), Clustering-Methoden und Clustering-Qualitätsindizes wird als "Smart Clusterization" abgekürzt. Data-Driven Documents (D3) und Three.js (3D) sind JavaScript-Bibliotheken, um dynamische, interaktive Datenvisualisierung zu erzeugen. Beide Techniken erlauben Visuelles Data Mining (VDM) in Webbrowsern, und werden als D3-3D abgekürzt. Latent Semantic Analysis (LSA) misst semantische Information durch Kontingenzanalyse des Textkorpus. Ihre Eigenschaften und Anwendbarkeit für Big-Data-Analytik werden demonstriert. "Smart clusterization", kombiniert mit den dynamischen VDM-Möglichkeiten von D3-3D, wird unter dem Begriff "Dynamic Clustering and Visualization of Smart Data via D3-3D-LSA" zusammengefasst.With the growing popularity of GitHub, the largest host of source code and collaboration platform in the world, it has evolved to a Big Data resource offering a variety of Open Source repositories (OSR). At present, there are more than one million organizations on GitHub, among them Google, Facebook, Twitter, Yahoo, CRAN, RStudio, D3, Plotly and many more. GitHub provides an extensive REST API, which enables scientists to retrieve valuable information about the software and research development life cycles. Our research pursues two main objectives: (I) provide an automatic OSR categorization system for data science teams and software developers promoting discoverability, technology transfer and coexistence; (II) establish visual data exploration and topic driven navigation of GitHub organizations for collaborative reproducible research and web deployment. To transform Big Data into value, in other words into Smart Data, storing and processing of the data semantics and metadata is essential. Further, the choice of an adequate text mining (TM) model is important. The dynamic calibration of metadata configurations, TM models (VSM, GVSM, LSA), clustering methods and clustering quality indices will be shortened as "smart clusterization". Data-Driven Documents (D3) and Three.js (3D) are JavaScript libraries for producing dynamic, interactive data visualizations, featuring hardware acceleration for rendering complex 2D or 3D computer animations of large data sets. Both techniques enable visual data mining (VDM) in web browsers, and will be abbreviated as D3-3D. Latent Semantic Analysis (LSA) measures semantic information through co-occurrence analysis in the text corpus. Its properties and applicability for Big Data analytics will be demonstrated. "Smart clusterization" combined with the dynamic VDM capabilities of D3-3D will be summarized under the term "Dynamic Clustering and Visualization of Smart Data via D3-3D-LSA".
44
Peng, Jie. "Real-time hybrid cutting with dynamic fluid visualization for virtual surgery". Thesis, Curtin University, 2013. http://hdl.handle.net/20.500.11937/804.
Pełny tekst źródłaStreszczenie:
It is widely accepted that a reform in medical teaching must be made to meet today's high volume training requirements. Virtual simulation offers a potential method of providing such trainings and some current medical training simulations integrate haptic and visual feedback to enhance procedure learning. The purpose of this project is to explore the capability of Virtual Reality (VR) technology to develop a training simulator for surgical cutting and bleeding in a general surgery.
45
Aquilio, Anthony Scott. "A Framework for Dynamic Terrain with Application in Off-road Ground Vehicle Simulations". Digital Archive @ GSU, 2006. http://digitalarchive.gsu.edu/cs_diss/11.
Pełny tekst źródłaStreszczenie:
The dissertation develops a framework for the visualization of dynamic terrains for use in interactive real-time 3D systems. Terrain visualization techniques may be classified as either static or dynamic. Static terrain solutions simulate rigid surface types exclusively; whereas dynamic solutions can also represent non-rigid surfaces. Systems that employ a static terrain approach lack realism due to their rigid nature. Disregarding the accurate representation of terrain surface interaction is rationalized because of the inherent difficulties associated with providing runtime dynamism. Nonetheless, dynamic terrain systems are a more correct solution because they allow the terrain database to be modified at run-time for the purpose of deforming the surface. Many established techniques in terrain visualization rely on invalid assumptions and weak computational models that hinder the use of dynamic terrain. Moreover, many existing techniques do not exploit the capabilities offered by current computer hardware. In this research, we present a component framework for terrain visualization that is useful in research, entertainment, and simulation systems. In addition, we present a novel method for deforming the terrain that can be used in real-time, interactive systems. The development of a component framework unifies disparate works under a single architecture. The high-level nature of the framework makes it flexible and adaptable for developing a variety of systems, independent of the static or dynamic nature of the solution. Currently, there are only a handful of documented deformation techniques and, in particular, none make explicit use of graphics hardware. The approach developed by this research offloads extra work to the graphics processing unit; in an effort to alleviate the overhead associated with deforming the terrain. Off-road ground vehicle simulation is used as an application domain to demonstrate the practical nature of the framework and the deformation technique. In order to realistically simulate terrain surface interactivity with the vehicle, the solution balances visual fidelity and speed. Accurately depicting terrain surface interactivity in off-road ground vehicle simulations improves visual realism; thereby, increasing the significance and worth of the application. Systems in academia, government, and commercial institutes can make use of the research findings to achieve the real-time display of interactive terrain surfaces.
46
Narrow, Taryn Lea. "Flow visualization within a seven-rod micro-bundle". Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17525.
Pełny tekst źródła
47
Lin, Wen-Tang. "Visualization of scalar velocity fields over one- and two-dimensional structures". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-08222009-040343/.
Pełny tekst źródła
48
Montgomery, David Eric. "Modeling and visualization of laser-based three-dimensional experimental spatial dynamic response". Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-10052007-143439/.
Pełny tekst źródła
49
Olsson, Björn. "Image Based Visualization Methods for Meteorological Data". Licentiate thesis, Linköping University, Linköping University, Department of Science and Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4325.
Pełny tekst źródłaStreszczenie:
Visualization is the process of constructing methods, which are able to synthesize interesting and informative images from data sets, to simplify the process of interpreting the data. In this thesis a new approach to construct meteorological visualization methods using neural network technology is described. The methods are trained with examples instead of explicitely designing the appearance of the visualization.
This approach is exemplified using two applications. In the fist the problem to compute an image of the sky for dynamic weather, that is taking account of the current weather state, is addressed. It is a complicated problem to tie the appearance of the sky to a weather state. The method is trained with weather data sets and images of the sky to be able to synthesize a sky image for arbitrary weather conditions. The method has been trained with various kinds of weather and images data. The results show that this is a possible method to construct weather visaualizations, but more work remains in characterizing the weather state and further refinement is required before the full potential of the method can be explored. This approach would make it possible to synthesize sky images of dynamic weather using a fast and efficient empirical method.
In the second application the problem of computing synthetic satellite images form numerical forecast data sets is addressed. In this case a mode is trained with preclassified satellite images and forecast data sets to be able to synthesize a satellite image representing arbitrary conditions. The resulting method makes it possible to visualize data sets from numerical weather simulations using synthetic satellite images, but could also be the basis for algorithms based on a preliminary cloud classification.
Report code: LiU-Tek-Lic-2004:66.
50
Zettner, Claudia Margaret. "Visualization of colloidal particle dynamics at a solid-liquid interface". Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17532.
Pełny tekst źródła