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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An architecture for incorporating interactive visualizations into scientific simulations

Mathur, Ravishankar 17 September 2015 (has links)
As scientific simulations get increasingly complex, so do the requirements of how to deal with the data that is produced. Few scientists and engineers today are satisfied with just looking at streams of numbers; we require graphical visualizations to better understand their meaning. The traditional method of visualization has been to save the simulation's results to a file, then load that file up in another program (eg. Microsoft Excel) for post-processing. Although post-processing data to produce visualizations may be sufficient for some simple simulations, a modern simulation designer usually wants more out of their visualization. Perhaps they want the visualization to be a 3D plot of an interplanetary trajectory, with the ability to zoom, pan, and rotate the scene interactively. Until now, doing so has required the designer to become adept at computer graphics, which is a feat that almost no scientist or engineer has the time to attempt. The research undertaken here introduces an architecture by which a simulation programmer can easily add interactive 3D visualizations to their simulations. This architecture has several benefits over existing visualization packages, the biggest one being that no knowledge of computer graphics is required to use the it in one's own simulations. Another benefit is that the resulting visualization is interactive by default, without any extra programming required on the part of the simulation designer. This thesis begins by introducing the theory behind how scientific simulations want to visualize data. Common aspects of all simulations are identified, and are used to develop a common "visualization language" that can be used by any simulation designer to specify what they want to visualize. The second part of the thesis specifies a particular implementation of this visualization language, called OpenFrames. Open- Frames is a library of functions that can be called from C, C++, or FORTRAN, and automatically implements the visualization specified by the designer.
2

Transportation of police dogs : A new solution with focus on usability and user experience

Näslund, Minette January 2017 (has links)
In Sweden there are around 400 service dogs and dog handlers within the police (Polisen,2016). The service dogs are used in 25 000 to 30 000 interventions every year. According to the Swedish Police Service (2016), the most common breed within the police in Sweden is German shepherds and Malinois. The service dogs are used to track down people, substances and objects. They can also be used for surveillance and defense (Polisen, 2016). According to Eneström (2015-06-18), the transportation cages for service dogs used within the Swedish police today are designed with smaller measurements than the ones required by the Swedish Board of Agriculture (2015). The reason why the smaller cages are used is that with the measurements stated in the regulations from the Swedish Board of Agriculture, two cages cannot fit into the luggage compartment of the currently used police patrol vehicles (Eneström,2015-06-18). Fortunately, the vehicle Volvo XC70, which is the most commonly used police patrol vehicle, will not be manufactured anymore. This means that a new vehicle have to be chosen touse both for regular patrol vehicles and for dog transportation patrol vehicles. The need of a new solution for transporting service dogs initiated this master thesis, which was initiated by the design company Dacat AB. The aim was to develop a solution for the cages and storage of equipment integrated in a new vehicle of suggestion for the police. The objective was that this new solution should be developed with the user in center, meet the regulations and legislations from stakeholders, obtain high usability, enhance the user experience and provide a healthy, comfortable working environment for both police dogs and the police officers. The outcome of the thesis is visualizations and animations made from 3D models describing the conceptual solution. A user centered design approach was used in this thesis since the target group is narrow and itwas important to understand the context and the target group well. The user centered approach was adapted to fit the design challenge of this thesis, especially to make it work with the fact that the target group consists of both a human and a dog. This lead to an approach and a process, in this thesis called Design for multi-species partnerships. The result consists of a vehicle recommendation with a technical solution for the interior design. It is constructed to fit the recommended vehicle, but also to be adapted to other vehicles, depending on which vehicle the police decide to choose. The interior design is beneficial for both the dogs and the dog handlers as well as for the complete police operations, since it creates a more viable and versatile vehicle for the police. It was important to fulfill the needs and desires of both parts of the target group as well as creating a well functioning solution that works efficiently. The police patrol vehicle is in fact a working place for the target group, which means that aspects not that important to other vehicle users, was shown to be important in this thesis. This because the working place environment is directly connected to health and the ability to perform well. The profession of the target group is important for the society and is filled with a lot of expectations and demands, therefore it is important that the working place environment offer them the possibility to perform well without interference. The master thesis is carried out during the last semester of the Industrial Design Engineerprogram at Luleå University of Technology. The course D7014A is 30 university credits which equals 20 weeks of fulltime work. The thesis was conducted in Gothenburg in the spring of 2017.
3

Att kommunicera rummets varierande funktion genom 3D-visualiseringar

Helgersson, Lisa January 2017 (has links)
Att kommunicera rummets varierande funktion genom 3D-visualiseringar är ett examensarbete i informationsdesign med inriktning rumslig gestaltning. Uppdraget kommer från Husmuttern AB som arbetar med huskoncept som sedan ska leda till produktion av modulhus. Syftet med arbetet har varit att studera hur en 3D-modell bör utformas för att kommunicera ett rums varierande funktion. Detta för att veta hur jag ska visualisera en undervisningssal i ett modulhus. För att arbeta fram en 3D-modell som uppfyller dessa krav krävs det att studera kommunikation mellan parter, bildens egenskaper, rummets form och färg, detta med stöd i litteratur, forskning och användartester. Därefter kunde en modell arbetas fram som kunde kommunicera en undervisningssal i ett modulhus. Genom användartesterna visade det sig att det är bra med en modell som fokuserar på modulhusets grund men också att ha med inredning för att visa funktionen. Det resulterade i en modell som innehöll husgrunden på en halva och realistisk inredning på den andra halvan men i samma modell. Genom litteratur och tidigare forskning blev resultatet för visualiseringar att det är ofta som 3D-modeller används. I utformningen bör detaljer uteslutas och verklighetstrogna vyer undvikas. Fokus bör ligga på det väsentliga då det annars blir för mycket att ta in för betraktaren och budskapet går förlorat, samt att verklighetstrogna skisser upplevs som färdigutvecklade. Det resulterade i en skissartad modell med avskalad inredning för att visa rummets funktion. / Att kommunicera rummets varierande funktion genom 3D-visualiseringar is a thesis in information design with orientation in spatial design. The assignment comes from the company Husmuttern AB who work with house concept that will lead to production of module housing. The purpose has been to study how a 3D- visualisation should be formed to communicate rooms varying functions. All this so that I will know how to visualize a classroom in a module housing. To be able to come up with a 3D-model that have this quality it was requires to study communication between two parties, properties of the image, shape and color of the room, with the help of literature, previous research and user tests. Then it was possible to come up with a model that could communicate a classroom constructed in module. Through the user tests it was shown to be preferable with a model that focuses on the basic units of the module housing but that also has some realistic decor to show some function. All this resulted in a model which includes the basic units of the module on one half and realistic décor on the other half in the same model. Thanks to literature and previous research the result for visualization was that it is common to use 3D-modells. In the modeling details and realistic views should be avoid. The focus should be on the essential or it will be too much for the viewer to take in and the message gets lost, but also that to realistic models were considered to be fully complete. All this resulted in a sketchy model with a small amount of décor to show the rooms function
4

Technical note: reliability of Suchey-Brooks and Buckberry-Chamberlain methods on 3D visualizations from CT and laser scans.

Villa, C., Buckberry, Jo, Cattaneo, C., Lynnerup, N. January 2013 (has links)
Yes / Previous studies have reported that the ageing method of Suchey-Brooks (pubic bone) and some of the features applied by Lovejoy et al. and Buckberry-Chamberlain (auricular surface) can be confidently performed on 3D visualizations from CT-scans. In this study, seven observers applied the Suchey-Brooks and the Buckberry-Chamberlain methods on 3D visualizations based on CT-scans and, for the first time, on 3D visualizations from laser scans. We examined how the bone features can be evaluated on 3D visualizations and whether the different modalities (direct observations of bones, 3D visualization from CT-scan and from laser scans) are alike to different observers. We found the best inter-observer agreement for the bones versus 3D visualizations, with the highest values for the auricular surface. Between the 3D modalities, less variability was obtained for the 3D laser visualizations. Fair inter-observer agreement was obtained in the evaluation of the pubic bone in all modalities. In 3D visualizations of the auricular surfaces, transverse organization and apical changes could be evaluated, although with high inter-observer variability; micro-, macroporosity and surface texture were very difficult to score. In conclusion, these methods were developed for dry bones, where they perform best. The Suchey-Brooks method can be applied on 3D visualizations from CT or laser, but with less accuracy than on dry bone. The Buckberry-Chamberlain method should be modified before application on 3D visualizations. Future investigation should focus on a different approach and different features: 3D laser scans could be analyzed with mathematical approaches and sub-surface features should be explored on CT-scans

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