Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 605-626). Available also in a digital version from Dissertation Abstracts.

Thesis (M.S. in architecture)--Washington State University, December 2009. / Title from PDF title page (viewed on Jan. 11, 2010). "School of Architecture and Construction Management." Includes bibliographical references (p. 55-58).

Thesis (M.S.)--Kutztown University of Pennsylvania, 2002. / Source: Masters Abstracts International, Volume: 45-06, page: 2711. Typescript. Abstract appears on leaves 1-2. Leaves 75-77 are presented as leaves 1-3. Includes bibliographical references (leaves 66-73).

Thesis (Ph. D.)--University of Canterbury, 2008. / Typescript (photocopy). Includes bibliographical references (p. 169-183). Also available via the World Wide Web.

Thesis (M.S. in Computer Science)--Naval Postgraduate School, March 2004. / Thesis advisor(s): Dr. Rudolph Darken, CDR Joseph Sullivan. Includes bibliographical references (p. 79-80). Also available online.

published_or_final_version / Industrial and Manufacturing Systems Engineering / Master / Master of Philosophy

This thesis looks at Augmented Reality (AR) and Expert Systems (ES) and how concepts from these techniques can be used to make instructions simpler for workers in the manufacturing industry. The experiment performed is based on a case study of “Block 9-11” at Volvo GTO in Skövde. A comparative study between the developed AR-system and the currently used instruction format has been made. For practical reasons the tasks and instructions were modified from the original. The results showed a similar time usage for the two systems but with a large amount of steps missed in the control group as well as a lower subjective usability-score from the testers, showing an advantage for the AR-system. In future work the plan is to further develop the adaptability-aspect, an aspect that didn’t give clear results in this study. / YOU2

With the use of an immersive display system such as CAVE system, the user is able to realize a 3D immersive virtual environment realistically. However, interacting with virtual worlds in CAVE systems using traditional input devices to perform easy operations such as manipulation, object selection, and navigation is often difficult. This difficulty could diminish the immersion and sense of presence when it comes to 3D virtual environment tasks. Our research aims to implement and evaluate alternative approaches of interaction with immersive virtual environments on mobile devices for manipulation and object selection tasks. As many researchers have noted, using a mobile device as an interaction device has a number of advantages, including built-in display, built-in control, and touch screen facility. These advantages facilitate simple tasks within immersive virtual environments. This research proposes new methods using mobile devices like Smart-phones to perform di↵erent kinds of interactions both as an input device, (e.g. performing selection and manipulation of objects) and as an output device (e.g. utilizing the screen as an extra view for a virtual camera or information display). Moreover, we developed a prototype system to demonstrate and informally evaluate these methods. The research conclusion suggests using mobile devices as a 3D-controller. This will be a more intuitive approach to interact within the virtual environment.

The purpose of this thesis work is to create a prototype for an augmented reality application that isaimed to support service technician when performing service and maintenance of machines andengines. The prototype will be used for investigating what technical limitations there is and toestablish basic usability for the user interface. The method that is used is user studies and analysis toevaluate use cases and user stories. An iterative work process is then applied for design and theprototype is continuously user tested.The resulting prototype uses a Samsung Galaxy Tab 2 running on Android operating system. Theframework used for augmented reality is NyARToolkit which handles marker recognition andconnections to Android. NyARToolkit uses OpenGL to visualize 3D models. The 3D models used isin the metasequoia fileformat. The application that implements the framework gets reasonableperformance on Galaxy Tab 2 and the visualization of 3D model is accomplished. A stabile markerrecognition is not attained.The usability has not been studied thoroughly, but it is designed based on the unofficial standard fordesign on mobile devices and for 3D manipulation on mobile devices. The graphical design is aimingfor an open workspace with as few interrupting objects as possible. Clear descriptions of objects are apart that has resulted from usertesting.Judging by the functionality that the prototype indicates it could be assumed that an application of thistype is possible in the given field, which is worked performed by a service technician. The testingequipment that has been used is not of the latest generation of mobile devices which can mean thatnewer models perform better than the ones used for testing. What seems to be limiting the use of themarker recognition is the quality of the video input. The device’s processing power affects howadvanced the 3D environment can be, which in turn can reduce performance when more complex 3Dmodels are used. Since there are several frameworks for the Android platform there is also severalsolutions to making a prototype with the sane functionality. Since I have only explored oneframework there is a possibility that another framework could have produced a more stabile prototypeThe user testing that has been performed points out that a distinct design is needed. Clearly describingtexts for different objects should be used to make the user less confused. An unofficial user designthat is generally used has to be implemented so that the users fell at home when handling theapplication on mobile devices.

No description available.