Theses and dissertations represent a wealth of scholarly and artistic content created by masters and doctoral students in the degree-seeking process. One of the first American universities to require ETDs for graduation, UNT began accepting theses and dissertations in electronic format in 1999.

	User Modeling Tools for Virtual Architecture Date: 2003-05 Creator: Uppuluri, Raja Description: As the use of virtual environments (VEs) is becoming more widespread, user needs are becoming a more significant part in those environments. In order to adapt to the needs of the user, a system should be able to infer user interests and goals. I developed an architecture for user modeling to understand users' interests in a VE by monitoring their actions. In this paper, I discussed the architecture and the virtual environment that was created to test it. This architecture employs sensors to keep track of all the users' actions, data structures that can store a record of significant events that have occurred in the environment, and a rule base. The rule base continually monitors the data collected from the sensors, world state, and event history in order to update the user goal inferences. These inferences can then be used to modify the flow of events within a VE. > more info
	Using Diffusion of Innovations to Explore Digital Gaming in Undergraduate Library Instruction Date: 2009-08 Creator: Robertson, Michael James Description: Digital games and simulations are receiving considerable notice within the Library and Information Science (LIS) community. This study adds to the depth of knowledge in this area by providing research on the likelihood a hypothetical digital game delivery method for library instruction achieves sufficient adoption to justify its development. Furthermore, this knowledge will assist decision making processes for individuals debating the current or potential role of digital gaming at their institutions. In this mixed methods study, over 300 undergraduates were surveyed about their technology preferences, including digital gaming, for delivery of two forms of academic library instruction. The two forms of library instruction were (a) providing users with spatial information on physical library layout, and (b) educating users on information literacy topics and skills. Observational data was collected during the survey sessions, occurring at face-to-face library instruction sessions. Self-selected survey participants were also interviewed to further probe their survey responses. Rogers' Diffusion of Innovations was the theoretical foundation to this research. The primary innovation of study was the digital game delivery method. Detailed analysis of the survey-based data set included three nonparametric scaling methods: 1) rank-sum scaling; 2) circular triad analysis; and 3) multidimensional preference mapping. Content analysis of the observations and semi-structured interviews also occurred. Major outcomes were 1) the digital game delivery method achieved mediocre preference across both questions; 2) the audiovisual delivery method received the highest overall preference ranking; and 3) overall preference for the audio-only delivery method was remarkably low. The most important theme across the observational data was the participants' waning attention during the face-to-face library instruction sessions. The most important outcome from the semi-structured interviews was interviewees' stated appreciation for useful technologies. Over 95% of participants were so-called digital natives, that is, born post-1980. Rogers' assertion that age plays a minor role in predicting technology adoption appears warranted, since the more innovative digital game delivery method achieved mediocre overall preference. > more info
	Using Motor Electrical Signature Analysis to Determine the Mechanical Condition of Vane-Axial Fans Date: 2002-08 Creator: Doan, Donald Scott Description: The purpose of this research was a proof of concept using a fan motor stator as transducer to monitor motor rotor and attached axial fan for mechanical motion. The proof was to determine whether bearing faults and fan imbalances could be detected in vane-axial fans using Motor Electrical Signature Analysis (MESA). The data was statistically analyzed to determine if the MESA systems could distinguish between baseline conditions and discrete fault frequencies for the three test conditions: bearing inner race defect, bearing outer race defect, and fan imbalance. The statistical conclusions for these proofs of concept were that MESA could identify all three faulted conditions. > more info
	Using Reinforcement Learning in Partial Order Plan Space Date: 2006-05 Creator: Ceylan, Hakan Description: Partial order planning is an important approach that solves planning problems without completely specifying the orderings between the actions in the plan. This property provides greater flexibility in executing plans; hence making the partial order planners a preferred choice over other planning methodologies. However, in order to find partially ordered plans, partial order planners perform a search in plan space rather than in space of world states and an uninformed search in plan space leads to poor efficiency. In this thesis, I discuss applying a reinforcement learning method, called First-visit Monte Carlo method, to partial order planning in order to design agents which do not need any training data or heuristics but are still able to make informed decisions in plan space based on experience. Communicating effectively with the agent is crucial in reinforcement learning. I address how this task was accomplished in plan space and the results from an evaluation of a blocks world test bed. > more info | Use restricted to UNT community
	Using SERVQUAL to Measure Users' Satisfaction of Computer Support in Higher Educational Environments Date: 2008-08 Creator: Yu, Brenda Wai Fong Description: The purpose of this research was to measure users' satisfaction with computer support in the higher education environment. The data for this study were gathered over a 5-week period using an online survey. Subjects (N=180) were members of a college at a major Texas university, which included both faculty and staff. SERVQUAL was the instrument used in this study. Two-ways statistical ANOVA analyses were conducted and revealed three statistically significant differences for Gender, Classification, and Comfort Level. > more info
	Using a Behavioral Treatment Package to Teach Tolerance to Skin Care Products to a Child with Autism: A Systematic Replication Date: 2009-05 Creator: Vidosevic, Tania A. Description: The purpose of this study is to investigate the effectiveness of a treatment package to teach a child with autism to willingly accept skin care products conducive to health and normal everyday living. The current study uses graduated exposure, modeling and contingent social attention to teach the child to accept the application of skin care products previously avoided. Results of the study showed that the participant tolerated criterion amounts of all target stimuli with both experimenter and parent. Follow-up probes revealed maintenance of the behaviors with only two out of the three target skin care products. > more info
	Using video modeling to teach complex play sequences to children with autism. Date: 2005-05 Creator: Jeffreys, Chris Description: Overcoming social skill deficits in children with autism is a challenge faced by educators and caregivers. Video modeling is a method of training that can promote generalization. This study extends the literature by investigating effects of video modeling on repetitive motor and vocal responses and skill generalization to other settings for children with low-functioning autism/ developmental disabilities. A multiple baseline across 3 play sequences was implemented with 3 males. Results indicate that 2 acquired vocal and motor responses and 1 acquired imitative noises and motor responses using video modeling alone. Generalization occurred with 2 participants. These findings have important implications for the field showing that video modeling can enable educators and caregivers to help children with autism overcome social skill deficits. > more info
	Utilization of Corridor Habitat by White-tailed Deer (Odocoileus virginianus) in Denton County, Texas Date: 2004-05 Creator: Bruce, Troy Kenneth Description: White-tailed deer (Odocoileus virginianus) (N=15) movements were determined with use of radio telemetry techniques to determine the utilization of corridor habitat on the Lake Ray Roberts Greenbelt Corridor (RRGC) in north central Texas. Home ranges were calculated using three estimation types. Male white-tailed deer tend to have home ranges twice that of female home ranges. Seasonal home ranges were largest during spring (Feb. - April) and fall (Aug. - Oct.) seasons. Males had greater seasonal variation in utilization than females. No statistically significant difference (p=0.24) between white-tailed deer locations when the RRGC experiences heavy human traffic compared to days when there is light human traffic. Linearity indices indicated home ranges less linear than expected (LI = 3.02). The RRGC should be maintained at its current status to provide a variety of vegetational types and protective cover for white-tailed deer and other wildlife of Denton County. > more info | Use restricted to UNT community
	Utilization of the family medical leave act: A case study Date: 2000-05 Creator: Mahdi, Taalib-Din N. Description: American businesses have confronted a changing world economy marked by increasing competition , technological innovation, and instability. Many more women have entered the labor force. Many families' caregiving needs are now being met by family members who also are holding down jobs. This, in turn, has fueled the rising need among employees for workplace policies that enable them to meet the often competing demands of job and home. In 1993, Congress passed the Family and Medical Leave Act (FMLA of the Act) to provide a national policy that supports families in their efforts to strike a workable balance between the competing demands of the workplace and the home. The objective of this study is to examine the amount of FMLA lost time at one particular company in order to determine a demographic and job characteristic profile of employees who take time away from their jobs for reasons that are protected by the Act. > more info | Use restricted to UNT community
	Utilizing staff training methods for developing a mathetics error correction procedure in a university classroom. Date: 2008-12 Creator: Staff, Donald Michael Description: The education community agrees that correcting student errors is important for learning. They do not agree on the components that define successful error correcting. Some theories suggest that detailed feedback facilitates adult learning and some suggest that less detail is needed for these learners. Gilbert (1962) applied the scientifically derived methods of Behavior Analysis when designing instruction. This study attempted to develop an efficient error correction procedure for university teachers. Throughout the semester, error correction design efforts between the teachers and the experimenter became more collaborative. While error correction procedures never showed systematic effects on student grades, later versions were viewed more favorably by both teachers and students and were more likely to be implemented accurately. Decreased teacher practice opportunities, due to low student participation, may have decreased the procedure's effectiveness. > more info