Relevant bibliographies by topics / Computer visualization and simulation / Dissertations / Theses
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Dissertations / Theses on the topic 'Computer visualization and simulation'

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Published: 4 June 2021
Last updated: 16 February 2022

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1

Nilsson, Johannes. "Physical Simulation and Visualization of Cells." Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12239.

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Multicellular organisms develop from a single cell by repeated cell division and cell differentiation. This report presents a computer program for simulating dividing cells. The program simulates a single cell that goes through a series of divisions to create a small organism.

The evolving organism can be visualized both in a 3D view and in a lineage tree structure that shows the cell heradity. Information about both final cells and intermediary cells is easily available for the user.

A method for fast physical simulation of soft bodies based on a mass-spring system combined with a pressure model is used to simulate the physical properties of the cells. Fast collision detection for soft bodies is achieved using hierarchical tree structure of axis aligned bounding boxes combined with an implicit penetration depth definition.

Biological control of cell division and differentiation is simulated using a model where the state of each cell is represented by as a vector of substances present in the cell. The cell state is updated at discrete time steps by a model of DNA transcription.

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Yngve, Gary. "Visualization for biological models, simulation, and ontologies /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/6912.

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Valldeperas, Roger. "Production Cell Simulation Visualization in 3D." Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27964.

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The thesis explains the development process of a production cell simulation in 3D implemented using Unity3D. The developed simulation communicates with existing control software and aims to test this control software in a 3D environment with physics simulation. The final result includes 3D models and also works as a visualization since it allows us to present the control system, and this visualization can be viewed using most web browsers. The thesis also includes a brief study and comparison between currently popular game engines to choose an appropriate option for this project.This is a project in collaboration with a local company (ARiSA) and has a high practical relevance.
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Kochakian, Nick. "Scientific visualizations /." Online version of thesis, 2009. http://hdl.handle.net/1850/10644.

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5

Balke, Kyle. "Perception & role of 3-D visualizations in planning a case study of the Northwest Passage Scenic Byway's viewshed protection & visualization project /." Diss., [Missoula, Mont.] : The University of Montana, 2010. http://etd.lib.umt.edu/theses/available/etd-01052010-141114.

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6

Cheung, King-bong Sebastian, and 張敬邦. "A computer visualization system for multiple submerged buoyant jets from ocean outfalls." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31224167.

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7

Wolmerud, Markus. "Real-Time Fluid Simulation and Visualization." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119937.

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This thesis presents a method based on Smoothed Particle Hydrodynamics to simulate sparse particle systems with fluid like properties in real-time. The simulation supports interactions with terrain and objects and is scaled depending on activity of the fluid. We use a carpet method on the GPU to visualize the water surface with translucency, reflection, refraction and added topology. Splash effects and foam are imitated and added as a last step.
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Nóbrega, Rui Pedro da Silva. "Visualization and interaction in a simulation system for flood emergencies." Master's thesis, Faculdade de Ciências e Tecnologia, 2008. http://hdl.handle.net/10362/7830.

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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia Informática
This thesis presents an interaction and visualization system for a river flood emergency simulation. It will also present a detailed study about forms of visual representation of critical elements in emergencies. All these elements are currently assembled in an application based on geographic information systems and agent simulation. Many of the goals in this thesis are interconnected with project Life-Saver. This project has the goal to develop an emergency response simulator, which needs a visualization and interaction system. The main goals of this thesis are, to create a visualization system for an emergency, to design an intuitive multimedia interface and to implement new forms of human-computer interaction. At the application level there is a representation of the simulation scenario with the multiple agent and their actions. Several studies were made to create an intuitive interface. New forms of multimedia interaction are studied and used such as interactive touch sensible boards and multi-touch panels. It is possible to load and retrieve geographic information on the scenario. The resulting architecture is used to visualize a simulation of an emergency flooding situation in a scenario where the Alqueva dam in Guadiana river fails.
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Wang, Ko-Chih. "Distribution-based Summarization for Large Scale Simulation Data Visualization and Analysis." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555452764885977.

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10

Tychonievich, Luther A. "Simulation and Visualization of Environments with Multidimensional Time." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2266.pdf.

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Xie, Kai, and 謝凱. "Volume quantification and visualization for spinal bone cement injection." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B29807578.

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12

Kamat, Vineet Rajendra. "Enabling 3D Visualization of Simulated Construction Operations." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/35470.

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Simulation modeling and visualization can substantially help in designing complex construction operations and in making optimal decisions where traditional methods prove ineffective or are unfeasible. However, there has been limited use of simulation in planning construction operations due to the unavailability of appropriate visual communication tools that can provide users with a more realistic and comprehensible feedback from simulation analyses. Visualizing simulated construction operations in 3D can significantly help in establishing the credibility of simulation models. In addition, 3D visualization can provide valuable insight into the subtleties of construction operations that are otherwise non-quantifiable and presentable. New software development technologies emerge at incredible rates that allow engineers and scientists to create novel, domain-specific applications. This study capitalized on a computer graphics technology based on the concept of the "Scene Graph" to design and implement a general-purpose 3D Visualization System that is Simulation and CAD-software independent. This system, the "Dynamic Construction Visualizer", enables realistic visualization of modeled construction operations and the resulting products in 3D and can be used in conjunction with a wide variety of simulation tools. This thesis describes the "Dynamic Construction Visualizer" as well as the "Scene Graph" architecture and the Frame Updating algorithms used in its design.
Master of Science
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13

Van, den Heever Johannes Lodewikus. "The development of a visualization tool to assist topographic map users." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53098.

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Thesis (MSc)--Stellenbosch University, 2002.
ENGLISH ABSTRACT: The recognition and description of relief features from their contour patterns is recognized as the main challenge in topographic map education. Conducting field exercises can solve this problem, but can be very time consuming. Modern technology, however, provides an alternative teaching technique by creating depictions of terrain. Important issues raised by this new approach include questions such as what these depictions should look like and how it should be presented to the user. Research presented here aims to address these issues by constructing design guidelines for terrain depiction. These design guidelines were derived from previous research and case studies. The guidelines focussed on research about how people perceive different representations of terrain and how these representations should optimally be presented. The design guidelines were constructed from research done in diverse fields such as cognitive psychology, cartography and engineering. Results of this research revealed that in order to develop an effective terrain visualization tool, it is crucial to incorporate different fields of expertise. The design guidelines were implemented with ArcView GIS and its 3D Analyst extension, which has the ability to display spatial data in three dimensions. The final product is called Terrain Visualization Tool 1.1 (TVT) and was created by customizing an ArcView GIS project (TV BUILDER) and constructing a Website (TV VIEWER). TV BUILDER creates the visualization data in the form of 20 web pages per topographic area and links them to TV VIEWER that serves as a platform to view the data. The design guidelines were implemented successfully and show the advantages of using Geographical Information Systems (GIS) in related research.
AFRIKAANSE OPSOMMING: Die identifisering en beskrywing van landskapelemente vanaf hul kontoere is geidentifiseer as die primere uitdaging in topografiese kaartonderrig. Hierdie probleem kan oorkom word deur kaartleesoefeninge in die veld te onderneem, maar dit neem baie tyd in beslag. Modeme tegnologie maak ‘n alternatiewe onderrigmedium moontlik deur die skep van verskillende landskapsuitbeeldings. Hierdie alternatief laat die vraag ontstaan hoe die uitbeeldings moet lyk en hoe dit aan die gebruiker aangebied moet word. Die doel van hierdie navorsing spreek hierdie vrae aan deur ontwerpriglyne vir landskap uitbeelding daar te stel. Die ontwerpriglyne is saamgestel deur bestudering van vorige navorsing en studies wat op hierdie gebied gedoen is. Die riglyne fokus veral op navorsing wat mense se reaksie op verskillende landskapuitbeeldings ondersoek. Die ontwerpriglyne is egter saamgestel deur navorsing wat gedoen is in velde soos kognitiewe sielkunde, kartografie en ingenieurswese. Hierdie navorsing het bewys dat inkorporasie van verskillende studievelde in die ontwikkeling van terrein visualiseringstoepassings essensieel is. Die riglyne is geimplementeer deur gebruik te maak van ArcView GIS en die 3D Analyst uitbreiding wat die vermoe het om data in drie dimensies uit te beeld. Die finale produk genaamd Terrain Visualization Tool 1.1 (TVT) bestaan uit twee komponente, naamlik ‘n aangepaste ArcView GIS projek (TV BUILDER) en ‘n webwerf (TV VIEWER). TV BUILDER skep die landskapsuitbeeldings van een topografiese area in die vorm van 20 web bladsye en verbind dit met TV VIEWER, wat as ‘n platform dien om die landskap uitbeeldings te beskou. Die ontwerpriglyne is suksesvol geimplementeer, wat die voordele van Geografiese Inligtingstelsels (GIS) in hierdie en soortgelyke toekomstige navorsing demonstreer.
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Suantak, Liana Son. "Modeling, simulation and visualization of stability and support operations using coevolution: Concepts and environment." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/280773.

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Current military simulations focus on high resolution, conventional warfare models based on well-established military doctrine. These systems allow commanders and soldiers to investigate friendly and enemy courses-of-action (COAs) that have been created by military commanders and their analysts. One exception to these systems is FOX, which generates friendly COAs using a genetic algorithm that engage with several static enemy COAs in conventional warfare scenarios. This dissertation extends the use of genetic algorithms to coevolution, a multi-sided genetic algorithm, for non-conventional warfare operations, termed Stability and Support Operations (SASO), which constitute many of the current major military operations in the world. It presents the concepts for a system that generates, simulates, and visualizes COAs for non-conventional units as well as conventional units' force distributions in a SASO environment. The simulation includes such factors as political climate, multi-sided faction animosities, and the influence of information operations on local populations. To allow fast wargaming, many concepts such as terrain and incident types are abstracted, instead of requiring the time-consuming high-resolution models currently in use. It also proposes that the analysis of coevolution strategies benefits from examining changes in fitness function, instead of the fitness function directly, as is generally done for one-sided genetic algorithms. As inputs, a military expert defines a scenario by specifying an environment of locales, factions and entities that belong to multiple sides. In the Sheherazade SASO Simulation, these entities occupy and move between locales, engage in combat, and work to calm or agitate the local populations. Each entity has a COA, which determines its planned moves and targets of attack. For conventional military units, the COAs represent their force distribution. A coevolution algorithm, or a multi-sided genetic algorithm, evolves these COAs based on the scores that result from the simulation. Visualization tools, including iconographs and other configural displays, allow the analysis and comparison of COAs over generations. The COAs that evolve represent strategies for each side to fulfill their competing goals, and can be used by an analyst as a decision support tool for training or planning.
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Hutton, Claude O. "3D battlespace visualization using operational planning data." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FHutton.pdf.

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Thesis (M.S. in Computer Science)--Naval Postgraduate School, September 2003.
Thesis advisor(s): Don Brutzman, Curtis Blais. Includes bibliographical references (p. 103-104). Also available online.
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16

Liao, Dezhi. "PHYSICALLY-BASED VISUALIZATION OF RESIDENTIAL BUILDING DAMAGE PROCESS IN HURRICANE." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4185.

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This research provides realistic techniques to visualize the process of damage to residential building caused by hurricane force winds. Three methods are implemented to make the visualization useful for educating the public about mitigation measures for their homes. First, the underline physics uses Quick Collision Response Calculation. This is an iterative method, which can tune the accuracy and the performance to calculate collision response between building components. Secondly, the damage process is designed as a Time-scalable Process. By attaching a damage time tag for each building component, the visualization process is treated as a geometry animation allowing users to navigate in the visualization. The detached building components move in response to the wind force that is calculated using qualitative rather than quantitative techniques. The results are acceptable for instructional systems but not for engineering analysis. Quick Damage Prediction is achieved by using a database query instead of using a Monte-Carlo simulation. The database is based on HAZUS® engineering analysis data which gives it validity. A reasoning mechanism based on the definition of the overall building damage in HAZUS® is used to determine the damage state of selected building components including roof cover, roof sheathing, wall, openings and roof-wall connections. Exposure settings of environmental aspects of the simulated environment, such as ocean, trees, cloud and rain are integrated into a scene-graph based graphics engine. Based on the graphics engine and the physics engine, a procedural modeling method is used to efficiently render residential buildings. The resulting program, Hurricane!, is an instructional program for public education useful in schools and museum exhibits.
Ph.D.
Other
Sciences
Modeling and Simulation PhD
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17

Kerwin, Thomas. "Enhancements in Volumetric Surgical Simulation." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306163401.

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18

Brutzman, Donald P. "A virtual world for an autonomous underwater vehicle/." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA286833.

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Dissertation (Ph.D. in Computer Science) Naval Postgraduate School, December 1994.
"December 1994." Dissertation supervisor(s): Michael J. Zyda. Appendix G videotape located at VHS 5000052. Includes bibliographical references (p. 238-262). Also available online.
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Burr, Janice E. "Jet mixing : the role of numerical flow visualization /." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12162009-020204/.

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Chaudhary, Gautam. "RZSweep a new volume-rendering technique for uniform rectilinear datasets /." Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-04012003-141739.

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Goethals, Andrea. "Use of 3D program visualization to show visibility, cohesion, and quality of Java class elements." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1000125.

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Thesis (M.S.)--University of Florida, 2002.
Title from title page of source document. Document formatted into pages; contains v, 152 p.; also contains graphics. Includes vita. Includes bibliographical references.
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Penick, Michael Alan. "VFIRE virtual fire in realistic environments : a framework for wildfire visualization in immersive environments /." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1442845.

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Shulga, Dmitry N. "The simulation system for propagation of fire and smoke." Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-04222003-161618.

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Kummary, Samuel Benny. "Visualization of sensor network applications in simulated environments." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2352.

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Yamamoto, Shuichi, and Naonori Ishii. "A way of computer use in mathematics teaching -The effectiveness that visualization brings-." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-81179.

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We report a class of the mathematics in which an animation technology (calculating and plotting capabilities) of the software Mathematica is utilized. This class is taught for university students in a computer laboratory during a second semester. It is our purpose to make a student realize the usefulness and the importance of mathematics easily through visualization. In addition, we hope that students will acquire a new power of mathematics needed in the 21st century. For several years, we have continued this kind of class, and have continued to investigate the effectiveness that our teaching method (especially visualization) brings in the understanding of the mathematics. In this paper, we present some of this teaching method, which is performed in our class. From the questionnaire survey, it is found that our teaching method not only convinces students that the mathematics is useful or important but also deepens the mathematic understanding of students more.
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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.

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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.
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Ljung, Patric. "Visualization of Particle In Cell Simulations." Thesis, Linköping University, Department of Science and Technology, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2340.

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A numerical simulation case involving space plasma and the evolution of instabilities that generates very fast electrons, i.e. approximately at half of the speed of light, is used as a test bed for scientific visualisation techniques. A visualisation system was developed to provide interactive real-time animation and visualisation of the simulation results. The work focuses on two themes and the integration of them. The first theme is the storage and management of the large data sets produced. The second theme deals with how the Visualisation System and Visual Objects are tailored to efficiently visualise the data at hand.

The integration of the themes has resulted in an interactive real-time animation and visualisation system which constitutes a very powerful tool for analysis and understanding of the plasma physics processes. The visualisations contained in this work have spawned many new possible research projects and provided insight into previously not fully understood plasma physics phenomena.

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Lee, Chin Siong. "NPS AUV workbench : collabroative environment for autonomous underwayer vehicles (AUV) mission planning and 3D visualization /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FLee.pdf.

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Thesis (M.S. in Computer Science)--Naval Postgraduate School, March 2004.
Thesis advisor(s): Donald P. Brutzman, Curtis L. Blais. Includes bibliographical references (p. 191-195). Also available online.
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Tauer, Gregory W. "A graph-based factor screening method for synchronous data flow simulation models /." Online version of thesis, 2009. http://hdl.handle.net/1850/9833.

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Ternes, J. Kevin. "Visualization and simulation of defect structures in the B2 phase of NiAl." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07212009-040437/.

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French, Ian Dept of Computer Science Australian Defence Force Academy UNSW. "Visualisation techniques for the computer simulation of bushfires in two dimensions." Awarded by:University of New South Wales - Australian Defence Force Academy. Dept. of Computer Science, 1992. http://handle.unsw.edu.au/1959.4/38721.

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This thesis examines techniques that provide a method of computer visualisation of bushfire spread. Existing techniques studied include, Kourtz & O???Regan, Green???s Contact, Heat Accumulation, Percolation modelling and Huygens??? Principle by Anderson et.al., French, Roberts, Richards. Many of these techniques are extended as part of a comprehensive study into how they perform in a two dimensional reference frame (ie over flat terrain only). New techniques are defined for Percolation Modelling and Huygens??? Principle. Each technique is examined in a series of test cases which include computer simulations with no wind, constant wind, variable wind, variable vegetation (including patchy fuel and two fuels) and where fuel burns out. These test cases provide: (a) an incremental approach to understanding the operation of each technique; (b) a basis for comparison; and (c) verification of correctness of the technique in two dimensions. Several of the techniques are shown, by these test cases, to be equivalent. For instance, the Kourtz & O???Regan technique using a square template is equivalent to the Contact Technique, Site percolation is similar to the Heat Accumulation technique and Template percolation is similar to the Contact Technique. Overall the Huygens??? Principle techniques provide the most accurate simulations of bushfire spread.
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Huang, Chien-Chia. "Frameworks for Visualizing Real-Time Construction Operation Simulations." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243627216.

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Hedayati, Mohammad Hadi. "Visualization of microprocessor execution in computer architecture courses: a case study at Kabul University." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_4960_1362394106.

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Computer architecture and assembly language programming microprocessor execution are basic courses taught in every computer science department. Generally, however, students have 
difficulties in mastering many of the concepts in the courses, particularly students whose first language is not English. In addition to their difficulties in understanding the purpose of given 
instructions, students struggle to mentally visualize the data movement, control and processing operations. To address this problem, this research proposed a graphical visualization approach 
and investigated the visual illustrations of such concepts and instruction execution by implementing a graphical visualization simulator as a teaching aid. The graphical simulator developed during the course of this research was applied in a computer architecture course at Kabul University, Afghanistan. Results obtained from student evaluation of the simulator show significant 
levels of success using the visual simulation teaching aid. The results showed that improved learning was achieved, suggesting that this approach could be useful in other computer science departments in Afghanistan, and elsewhere where similar challenges are experienced.

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Mnif, Khaled. "Using XML/HTTP to store, serve and annotate tactical scenarios for X3D operational visualization and anti-terrorist training." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FMnif.pdf.

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35

Akhavian, Reza. "A Framework for Process Data Collection, Analysis, and Visualization in Construction Projects." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5092.

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Automated data collection, simulation and visualization can substantially enhance the process of designing, analysis, planning, and control of many engineering processes. In particular, managing processes that are dynamic in nature can significantly benefit from such techniques. Construction projects are good examples of such processes where a variety of equipment and resources constantly interact inside an evolving environment. Management of such settings requires a platform capable of providing decision-makers with updated information about the status of project entities and assisting site personnel making critical decisions under uncertainty. To this end, the current practice of using historical data or expert judgments as static inputs to create empirical formulations, bar chart schedules, and simulation networks to study project activities, resource operations, and the environment under which a project is taking place does not seem to offer reliable results. The presented research investigates the requirements and applicability of a data-driven modeling framework capable of collecting and analyzing real time field data from construction equipment. In the developed data collection scheme, a stream of real time data is continuously transferred to a data analysis module to calculate the input parameters required to create dynamic 3D visualizations of ongoing engineering activities, and update the contents of a discrete event simulation (DES) model representing the real engineering process. The generated data-driven simulation model is an effective tool for projecting future progress based on existing performance. Ultimately, the developed framework can be used by project decision-makers for short-term project planning and control since the resulting simulation and visualization are completely based on the latest status of project entities.
ID: 031001404; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Title from PDF title page (viewed June 10, 2013).; Thesis (M.S.C.E.)--University of Central Florida, 2012.; Includes bibliographical references (p. 98-105).
M.S.C.E
Masters
Civil, Environmental, and Construction Engineering
Engineering and Computer Science
Civil Engineering
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Johansson, Daniel. "Extending a battlefield simulator with large scale terrain rendering and flight simulator functionality." Thesis, Linköping University, Department of Science and Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5623.

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Simulation of modern battlefield scenarios on consumer PC:s deal with a number of limitations, many of them related to the limited performance of a normal PC compared to workstations and servers. Specifically, the visualization of realistic large scale outdoor environments is problematic because of the large amount of data required to describe its contents. This becomes especially problematic in simulations of fast moving vehicles such as aircrafts, where one needs to maintain high frame rates while having high visual detail for orientation and targeting. This thesis proposes a method of generating realistic outdoor environments from actual geological data and then rendering it efficiently using an improved level of detail algorithm within a proprietary battle simulation framework. We also show how to integrate an open source Flight Dynamics Model (FDM) into the simulation framework for future hybrid simulations involving aircrafts.

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37

Sik, Lingling. "GPU Ray Traced Rendering And Image Fusion Based Visualization Of Urban Terrain For Enhanced Situation Awareness." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6020.

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Urban activities involving planning, preparing for and responding to time critical situations often demands sound situational awareness of overall settings. Decision makers, who are tasked to respond effectively to emergencies, must be equipped with information on the details of what is happening, and must stay informed with updates as the event unfolds and remain attentive to the extent of impact the dynamics of the surrounding settings might have. Recent increases in the volumes of geo-spatial data such as satellite imageries, elevation maps, street-level photographs and real-time imageries from remote sensory devices affect the way decision makers make assessments in time-critical situations. When terrain related spatial information are presented accurately, timely, and are augmented with terrain analysis such as viewshed computations, enhanced situational understanding could be formed. Painting such enhanced situational pictures, however, demands efficient techniques to process and present volumes of geo-spatial data. Modern Graphics Processing Units (GPUs) have opened up a wide field of applications far beyond processing millions of polygons. This dissertation presents approaches that harness graphics rendering techniques and GPU programmability to visualize urban terrain with accuracy, viewshed analysis and real-time imageries. The GPU ray tracing and image fusion visualization techniques presented herein have the potential to aid in achieving enhanced urban situational awareness and understanding. Current state of the art polygon based terrain representations often use coarse representations for terrain features of less importance to improve rendering rate. This results in reduced geometrical accuracy for selective terrain features that are considered less critical to the visualization or simulation needs. Alternatively, to render highly accurate urban terrain, considerable computational effort is needed. A compromise between achieving real-time rendering rate and accurate terrain representations would have to be made. Likewise, computational tasks involved in terrain-related calculations such as viewshed analysis are highly computational intensive and are traditionally performed at a non-interactive rate. The first contribution of the research involves using GPU ray tracing, a rendering approach, conventionally not employed in the simulation community in favor of rasterization, to achieve accurate visualization and improved understanding of urban terrain. The efficiency of using GPU ray tracing is demonstrated in two areas, namely, in depicting complex, large scale terrain and in visualizing viewshed terrain effects at interactive rate. Another contribution entails designing a novel approach to create an efficient and real-time mapping system. The solution achieves updating and visualizing terrain textures using 2D geo-referenced imageries for enhanced situational awareness. Fusing myriad of multi-view 2D inputs spatially for a complex 3D urban scene typically involves a large number of computationally demanding tasks such as image registrations, mosaickings and texture mapping. Current state of the art solutions essentially belongs to two groups. Each strives to either provide near real-time situational pictures in 2D or off-line complex 3D reconstructions for subsequent usages. The solution proposed in this research relies on using prior constructed synthetic terrains as backdrops to be updated with real-time geo-referenced images. The solution achieves speed in fusing information in 3D. Mapping geo-referenced images spatially in 3D puts them into context. It aids in conveying spatial relationships among the data. Prototypes to evaluate the effectiveness of the aforementioned techniques are also implemented. The benefits of augmenting situational displays with viewshed analysis and real-time geo-referenced images in relation to enhancing the user's situational awareness are also evaluated. Preliminary results from user evaluation studies demonstrate the usefulness of the techniques in enhancing operators' performances, in relation to situational awareness and understanding.
Ph.D.
Doctorate
Industrial Engineering and Management Systems
Engineering and Computer Science
Modeling and Simulation
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38

Larsson, Mikael. "A Visualization Tool for Drill Rig Simulators used in Software Development." Thesis, Örebro University, School of Science and Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-10313.

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Boomer is a machine that is developed and produced by Atlas Copco Rock Drills AB, which is used for underground mining and tunneling. It is a blast-hole drilling rig equipped with drills that are attached to the arms, called booms, which the rig holds. The machine is controlled and monitored by Atlas Copco’s Rig Control System (RCS), which consists of a number of intelligent units connected in a CAN-net. When developing software for the RCS, a simulator that makes it possible to run the software on an ordinary desktop PC is used. The problem is that there is no intuitive way to see how the booms are oriented, while positioning. Therefore it is desirable to have a 3D visualization of the rig, with focus on the booms, which can be used alongside the simulator to get immediate feedback about the movements of the booms. This report describes the process of developing an application that handles communication with the simulator and the 3D visualization.


Boomer är en maskin som utvecklas och produceras av Atlas Copco Rock Drills AB. Maskinen används vid gruvbrytning och tunnelkonstruktion. Boomer är en spränghålsborrigg som är utrustad med borrar vilka är monterade på riggens armar, kallade bommar. En Boomer övervakas och kontrolleras av Atlas Copcos kontrollsystem, RCS, som är ett system bestående av intelligenta enheter sammankopplade i ett CAN-nät. Vid utveckling av mjukvara till RCS används en simulator som gör det möjligt att köra mjukvaran på en vanlig PC. Problemet är att det inte finns något intuitivt sätt att se hur bommarna är riktade medans de blir positionerade. Därför är det önskvärt med en 3D visualisering av borriggen, med fokus på dess boomar, som kan användas tillsammans med simulatorn för att ge en direkt återkoppling av boomarnas förflyttning. Denna rapport beskriver utvecklingsprocessen för en applikation som hanterar kommunikationen med simulatorn och 3D visualiseringen.

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39

Koehler, Christopher M. "Visualization of Complex Unsteady 3D Flow: Flowing Seed Points and Dynamically Evolving Seed Curves with Applications to Vortex Visualization in CFD Simulations of Ultra Low Reynolds Number Insect Flight." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1291756507.

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40

Hand, Randall Eugene. "A faster technique for rendering meshes in multiple display systems." Master's thesis, Mississippi State : Mississippi State University, 2002. http://library.msstate.edu/etd/show.asp?etd=etd-04082002-165856.

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41

Bennett, Daniel M. "Tools and techniques for locating and steering parallel simulations through bifurcation points." Kent State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1290788730.

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42

Dutta, Soumya. "In Situ Summarization and Visual Exploration of Large-scale Simulation Data Sets." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524070976058567.

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43

Iwata, Curtis. "A representation method for large and complex engineering design datasets with sequential outputs." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50266.

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This research addresses the problem of creating surrogate models of high-level operations and sustainment (O&S) simulations with time sequential (TS) outputs. O&S is a continuous process of using and maintaining assets such as a fleet of aircraft, and the infrastructure to support this process is the O&S system. To track the performance of the O&S system, metrics such as operational availability are recorded and reported as a time history. Modeling and simulation (M&S) is often used as a preliminary tool to study the impact of implementing changes to O&S systems such as investing in new technologies and changing the inventory policies. A visual analytics (VA) interface is useful to navigate the data from the M&S process so that these options can be compared, and surrogate modeling enables some key features of the VA interface such as interpolation and interactivity. Fitting a surrogate model is difficult to TS data because of its size and nonlinear behavior. The Surrogate Modeling and Regression of Time Sequences (SMARTS) methodology was proposed to address this problem. An intermediate domain Z was calculated from the simulation output data in a way that a point in Z corresponds to a unique TS shape or pattern. A regression was then fit to capture the entire range of possible TS shapes using Z as the inputs, and a separate regression was fit to transform the inputs into the Z. The method was tested on output data from an O&S simulation model and compared against other regression methods for statistical accuracy and visual consistency. The proposed methodology was shown to be conditionally better than the other methodologies.
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44

Coninx, Alexandre. "Visualisation interactive de grands volumes de données incertaines : pour une approche perceptive." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00749885.

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Les études scientifiques et d'ingénierie actuelles font de plus en plus souvent appel à des techniques de simulation numérique pour étudier des phénomènes physiques complexes. La visualisation du résultat de ces simulations sur leur support spatial, souvent nécessaire à leur bonne compréhension, demande la mise en place d'outils adaptés, permettant une restitution fidèle et complète de l'information présente dans un jeu de données. Une telle visualisation doit donc prendre en compte les informations disponibles sur la qualité du jeu de données et l'incertitude présente. Cette thèse a pour but d'améliorer les méthodes de visualisation des champs de données scalaires de façon à intégrer une telle information d'incertitude. Les travaux présentés adoptent une approche perceptive, et utilisent les méthodes expérimentales et les connaissances préalables obtenues par la recherche sur la perception visuelle pour proposer, étudier et finalement mettre en oeuvre des nouvelles techniques de visualisation. Une revue de l'état de l'art sur la visualisation de données incertaines nous fait envisager l'utilisation d'un bruit procédural animé comme primitive pour la représentation de l'incertitude. Une expérience de psychophysique nous permet d'évaluer des seuils de sensibilité au contraste pour des stimuli de luminance générés par l'algorithme de bruit de Perlin, et de déterminer ainsi dans quelles conditions ces stimuli seront perçus. Ces résultats sont validés et étendus par l'utilisation d'un modèle computationnel de sensibilité au contraste, que nous avons réimplémenté et exécuté sur nos stimuli. Les informations obtenues nous permettent de proposer une technique de visualisation des données scalaires incertaines utilisant un bruit procédural animé et des échelles de couleur, intuitive et efficace même sur des géométries tridimensionnelles complexes. Cette technique est appliquée à deux jeux de données industriels, et présentée à des utilisateurs experts. Les commentaires de ces utilisateurs confirment l'efficacité et l'intérêt de notre technique et nous permettent de lui apporter quelques améliorations, ainsi que d'envisager des axes de recherche pour des travaux futurs.
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45

Zheng, Jiaqi. "Interactive Visual Analytics for Agent-Based simulation : Street-Crossing Behavior at Signalized Pedestrian Crossing." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264991.

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To design a pedestrian crossing area reasonably can be a demanding task for traffic planners. There are several challenges, including determining the appropriate dimensions, and ensuring that pedestrians are exposed to the least risks. Pedestrian safety is especially obscure to analyze, given that many people in Stockholm cross the street illegally by running against the red light. To cope with these challenges, computational approaches of trajectory data visual analytics can be used to support the analytical reasoning process. However, it remains an unexplored field regarding how to visualize and communicate the street-crossing spatio-temporal data effectively. Moreover, the rendering also needs to deal with a growing data size for a more massive number of people. This thesis proposes a web-based interactive visual analytics tool for pedestrians' street-crossing behavior under various flow rates. The visualization methodology is also presented, which is then evaluated to have achieved satisfying communication and rendering effectiveness for maximal 180 agents over 100 seconds. In terms of the visualization scenario, pedestrians either wait for the red light or cross the street illegally; all people can choose to stop by a buffer island before they finish crossing. The visualization enables the analysis under multiple flow rates for 1) pedestrian movement, 2) space utilization, 3) crossing frequency in time-series, and 4) illegal frequency. Additionally, to acquire the initial trajectory data, Optimal Reciprocal Collision Avoidance (ORCA) algorithm is engaged in the crowd simulation. Then different visualization techniques are utilized to comply with user demands, including map animation, data aggregation, and time-series graph.
Att konstruera ett gångvägsområde kan rimligen vara en krävande uppgift för trafikplanerare. Det finns flera utmaningar, bland annat att bestämma lämpliga dimensioner och se till att fotgängare utsätts för minst risker. Fotgängarnas säkerhet är särskilt obskyrlig att analysera, eftersom många människor i Stockholm korsar gatan olagligt genom att springa mot det röda ljuset. För att klara av dessa utmaningar kan beräkningsmetoder för bana data visuell analys användas för att stödja den analytiska resonemangsprocessen. Det är emellertid ett oexplorerat fält om hur man visualiserar och kommunicerar gataövergången spatio-temporal data effektivt. Dessutom måste rendering också hantera en växande datastorlek för ett mer massivt antal människor. Denna avhandling föreslår ett webbaserat interaktivt visuellt analysverktyg för fotgängares gatöverföring under olika flödeshastigheter. Visualiseringsmetoden presenteras också, som sedan utvärderas för att ha uppnått tillfredsställande kommunikation och effektivitet för maximal 180 agenter över 100 sekunder. Vad beträffar visualiseringsscenariot, väntar fotgängare antingen på det röda ljuset eller tvärs över gatan; alla människor kan välja att stanna vid en buffertö innan de slutar korsa. Visualiseringen möjliggör analysen under flera flödeshastigheter för 1) fotgängarrörelse, 2) rymdutnyttjande, 3) korsfrekvens i tidsserier och 4) olaglig frekvens. För att förvärva den ursprungliga bana-data är Optimal Reciprocal Collision Avoidance (ORCA) algoritmen förknippad med folkmassimuleringen. Därefter utnyttjas olika visualiseringstekniker för att uppfylla användarnas krav, inklusive kartanimering, dataaggregering och tidsserier.
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46

Persson, Tomas. "Using visualization to support identification and assessment of threat of nearby adversaries : An aid for after action reviews in air combat simulation." Thesis, KTH, Medieteknik och interaktionsdesign, MID, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-193570.

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The goal of this work has been to develop a design suggestion of a visualization system that supports training instructors and air force units during After Action Reviews (AAR) in training at the Swedish Air Force Combat Simulation Center (FLSC). The suggestion was developed through a design study consisting of interviews, a demonstration and a design workshop in parallel with an iterative prototyping process. The study resulted in a visualization system that indicates enemy aircraft at threatening distances to support identification of critical situations. To support the following threat assessment, visualizations that automatically present radar lock-on information and missile envelopes are suggested. Although radar lock-on information and missile envelopes has been presented in earlier visualizations they have not been adapted to the mode of operations of the AAR. Adapting the visualizations to the AAR would make the threat assessment easier and more effective to conduct. The purpose of the visualization is to make it easier for training instructors and air force units with limited experience of simulation training to conduct a high quality AAR through emphasizing relevant situations and points of interest.
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47

Bangalore, Purushotham Venkataramaiah. "An open framework for developing distributed computing environments for multidisciplinary computational simulations." Diss., Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-04082003-112124.

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48

Lee, Chin Siong. "NPS AUV workbench: collaborative environment for autonomous underwater vehicles (AUV) mission planning and 3D visualization." Thesis, Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1658.

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alities. The extensible Markup Language (XML) is used for data storage and message exchange, Extensible 3D (X3D) Graphics for visualization and XML Schema-based Binary Compression (XSBC) for data compression. The AUV Workbench provides an intuitive cross-platform-capable tool with extensibility to provide for future enhancements such as agent-based control, asynchronous reporting and communication, loss-free message compression and built-in support for mission data archiving. This thesis also investigates the Jabber instant messaging protocol, showing its suitability for text and file messaging in a tactical environment. Exemplars show that the XML backbone of this open-source technology can be leveraged to enable both human and agent messaging with improvements over current systems. Integrated Jabber instant messaging support makes the NPS AUV Workbench the first custom application supporting XML Tactical Chat (XTC). Results demonstrate that the AUV Workbench provides a capable testbed for diverse AUV technologies, assisting in the development of traditional single-vehicle operations and agent-based multiple-vehicle methodologies. The flexible design of the Workbench further encourages integration of new extensions to serve operational needs. Exemplars demonstrate how in-mission and post-mission event monitoring by human operators can be achieved via simple web page, standard clients or custom instant messaging client. Finally, the AUV Workbench's potential as a tool in the development of multiple-AUV tactics and doctrine is discussed.
Civilian, Singapore Defence Science and Technology Agency
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49

Freitas, Carla Maria Dal Sasso. "Uma abordagem unificada para análise exploratória e simulação interativa visual." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1994. http://hdl.handle.net/10183/17754.

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Análise exploratória visual e simulação interativa visual são duas áreas afins, porém tratadas separadamente até o momento. 0 trabalho relatado neste texto objetivou a abordagem unificada destas duas classes de problemas, a partir da identificação de ambas com as questões de linguagens visuais, visualização de dados e de programas. A partir de estudos de casos considerados representativos destas duas classes (análise de dados multivariados populacionais, análise de dados multivariados espaciais, análise de dados univariados, estudo de campos eletromagnéticos a partir de resultados da análise de elementos finitos, simulação interativa visual de objetos animados dinamicamente e simulação interativa de sistemas discretos) é estabelecida uma classificação de entidades e atributos. Entidades são consideradas como pertencendo a três grandes classes: sistemas compostos por múltiplas entidades, objetos manufaturáveis e entidades ou fenômenos naturais, e são caracterizadas por atributos que podem ser analisados de acordo com sua natureza, o tipo dos valores que podem assumir, a natureza e dimensão do domínio no qual estão definidos. A seguir, são identificados os objetivos e tarefas no tratamento das entidades e atributos. Como objetivos considera-se observação de objetos num contexto, analise da estrutura dos objetos, analise das suas propriedades estáticas ou dinâmicas, analise comparativa de vários objetos e comunicação de informações. Tarefas básicas que servem a realização dos diversos objetivos são navegação, seleção, consulta, preparação e controle de processamento, anotação de textos e armazenamento de resultados. Esta classificação de tarefas permite a determinação das ferramentas básicas necessárias a realização tanto de analise exploratória como de simulação interativa, ambas visuais. E estabelecido um conjunto coordenado de ferramentas que permitem a realização das tarefas mencionadas com as diferentes classes de entidades. Essencial a estas classes de problemas é a representação visual a ser adotada como forma de transmissão de uma informação a respeito de uma entidade. Este aspecto é enfatizado neste trabalho; é estabelecida uma taxonomia para representações visuais, a saber, Ícones, gráficos e tabelas, diagramas e redes, modelos geométricos, mapas e seqüencias. de acordo com a informação fornecida e com o atendimento dos objetivos identificados anteriormente. Na seqüência, é proposta uma metodologia para a escolha de representações visuais baseada na classe das entidades sob estudo e nos objetivos do estudo (ou de uma face do estudo), numa primeira etapa, e na natureza dos atributos e dimensão de seu domínio, numa segunda etapa. A tese apresenta a abordagem baseada em ferramentas como paradigma básico de linguagem visual para analise exploratória e simulação interativa visual e estende o use da abordagem declarativa de visualização de programas a questão de visualização de dados. As classes de entidades reconhecidas ao longo do estudo são modeladas de acordo com a abordagem orientada a objetos: da mesma forma, o conjunto de ferramentas é organizado numa plataforma orientada a objetos. Esta plataforma é comparada, do ponto de vista funcional e considerando diferentes classes de usuários, com sistemas existentes. A estrutura proposta é, ainda, discutida como um modelo de referência para analise exploratória e simulação interativa visual.
Two related areas, visual exploratory analysis and visual interactive simulation, have been handled separately until now. This thesis gives an integrated approach to these two classes of problems, based on their relationships to visual languages, data visualization and program visualization. Case studies representing both areas like multivariate analysis of populational data, multivariate analysis of spatial data, analysis of univariate data, study of electromagnetic fields based on finite element analysis, dynamic graphical simulation and interactive visual discrete-event simulation, allow the construction of a taxonomy for entities and attributes. Entities are considered to belong to three classes: multiple-entity systems, manufacturable objects, and natural entities or phenomena. They are characterized by their attributes, which in turn are classified by nature, value types and nature and dimension of their definition domain. The goals and tasks in the study of entities and attributes are identified. Goals are observing an object in a context, analyzing an object structure, analyzing their static and dynamic properties, comparing objects or different states of objects and communicating information. Tasks are elementary procedures employed to achieve certain goals: navigation, selection, query, modification, processing control, text annotation and data storage. This classification of tasks determine the basic tools that a scientific user needs to visually explore data or conduct visual interactive simulation studies. These tools are organized as a set of interactive procedures that can be applied to visual representations of entities or their attributes. Visual representations are, of course, essential to visual exploratory analysis and visual interactive simulation, in order to precisely and adequately represent information about entities. This question is emphasized in this work. Based on the information conveyed by the several existing graphical representations as well as the goals established earlier, six classes of visual representations are considered: icons, graphs and tables, diagrams and networks, geometric models, maps, and sequences of these representations. A methodology for selecting the appropriate visual representation is then proposed, based firstly on the goals of the study and the classes of entities and attributes, and secondly on the nature and dimension of the attributes domain. This thesis presents a tool-centered approach as the paradigm for both visual exploratory analysis and visual interactive simulation. The thesis also extends the concept of declarative visualization employed for program visualization to scientific data visualization. The classes of entities identified in the case studies are modeled using the object-oriented approach; the set of tools defined here is also organized in an objectoriented framework. Our proposal is discussed as a reference model for visual exploratory analysis and visual interactive simulation.
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50

Stewart, Sandra. "Effects of computer self-efficacy and spatial visualization ability on student perceptions of 2D/3D CAD virtual prototype simulations for apparel design." [Ames, Iowa : Iowa State University], 2008.

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