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  Partner: UNT Libraries
 Degree Discipline: Information Science
Smoothing the information seeking path: Removing representational obstacles in the middle-school digital library.

Smoothing the information seeking path: Removing representational obstacles in the middle-school digital library.

Date: May 2002
Creator: Abbas, June M.
Description: Middle school student's interaction within a digital library is explored. Issues of interface features used, obstacles encountered, search strategies and search techniques used, and representation obstacles are examined. A mechanism for evaluating user's descriptors is tested and effects of augmenting the system's resource descriptions with these descriptors on retrieval is explored. Transaction log data analysis (TLA) was used, with external corroborating achievement data provided by teachers. Analysis was conducted using quantitative and qualitative methods. Coding schemes for the failure analysis, search strategies and techniques analysis, as well as extent of match analysis between terms in student's questions and their search terms, and extent of match analysis between search terms and controlled vocabulary were developed. There are five chapters with twelve supporting appendixes. Chapter One presents an introduction to the problem and reviews the pilot study. Chapter Two presents the literature review and theoretical basis for the study. Chapter Three describes the research questions, hypotheses and methods. Chapter Four presents findings. Chapter Five presents a summary of the findings and their support of the hypotheses. Unanticipated findings, limitations, speculations, and areas of further research are indicated. Findings indicate that middle school users interact with the system in various sequences of patterns. ...
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Social Context of Human Computer Interaction : An Examination of User Adoption of Electronic Journals

Social Context of Human Computer Interaction : An Examination of User Adoption of Electronic Journals

Date: December 1997
Creator: Scannell, Janette Bradley
Description: This study sought to determine whether or not factors such as relative advantage, compatibility, result demonstrability, ease of use, image, visibility, and voluntariness were involved in users' adoption of a refereed Web-based journal for informational, citation, and publication purposes. In addition, the study tested whether or not exposure to a prototype of a refereed Web-based journal would change users' perceptions concerning how well they would interact with the journal.
Contributing Partner: UNT Libraries
Social Media in Policing: a Study of Dallas-fort Worth Area City Police Departments

Social Media in Policing: a Study of Dallas-fort Worth Area City Police Departments

Date: August 2013
Creator: Altunbas, Fuat
Description: Social media offers numerous opportunities to companies, organizations and government agencies to communicate with people outside their organization, to promote their interests and to better serve their customers, or as in the case with government agencies, to better serve their citizens. However, little is known about how police departments in particular use social media. This research study explores why police departments use social media, how they manage their social media tools, and the problems and challenges experienced as they use social media. This qualitative study is largely guided by grounded theory. The data were collected from a study population using local police departments in the Dallas-Fort worth (DFW) area principal cities using both individual interviews with police departments’ social media officers and observations of these departments’ online social media tools (in particular, Facebook and Twitter). This study has shown that the DFW area city police departments are using social media quite extensively to keep the public informed and often for investigative purposes. There are some success factors to adopting and using these tools, such as the motivation of department staff and their benefits, successful implementation of the tools, the simplicity of using tools and that it is absolutely free.
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Solutions for Dynamic Channel Assignment and Synchronization Problem for Distributed Wireless Multimedia System

Solutions for Dynamic Channel Assignment and Synchronization Problem for Distributed Wireless Multimedia System

Date: August 2002
Creator: Hong, SungBum
Description: The recent advances in mobile computing and distributed multimedia systems allow mobile hosts (clients) to access wireless multimedia Data at anywhere and at anytime. In accessing multimedia information on the distributed multimedia servers from wireless personal communication service systems, a channel assignment problem and synchronization problems should be solved efficiently. Recent demand for mobile telephone service have been growing rapidly while the electro-magnetic spectrum of frequencies allocated for this purpose remain limited. Any solution to the channel assignment problem is subject to this limitation, as well as the interference constraint between adjacent channels in the spectrum. Channel allocation schemes provide a flexible and efficient access to bandwidth in wireless and mobile communication systems. In this dissertation, both an efficient distributed algorithm for dynamic channel allocation based upon mutual exclusion model, and an efficient distributed synchronization algorithm using Quasi-sink for wireless and mobile multimedia systems to ensure and facilitate mobile client access to multimedia objects are proposed. Algorithm's performance with several channel systems using different types of call arrival patterns is determined analytically. A set of simulation experiments to evaluate the performance of our scheme using message complexity and buffer usage at each frame arrival time.
Contributing Partner: UNT Libraries
Students' criteria for course selection: Towards a metadata standard for distributed higher education

Students' criteria for course selection: Towards a metadata standard for distributed higher education

Date: August 2000
Creator: Murray, Kathleen R.
Description: By 2007, one half of higher education students are expected to enroll in distributed learning courses. Higher education institutions need to attract students searching the Internet for courses and need to provide students with enough information to select courses. Internet resource discovery tools are readily available, however, users have difficulty selecting relevant resources. In part this is due to the lack of a standard for representation of Internet resources. An emerging solution is metadata. In the educational domain, the IEEE Learning Technology Standards Committee (LTSC) has specified a Learning Object Metadata (LOM) standard. This exploratory study (a) determined criteria students think are important for selecting higher education courses, (b) discovered relationships between these criteria and students' demographic characteristics, educational status, and Internet experience, and (c) evaluated these criteria vis-Ă -vis the IEEE LTSC LOM standard. Web-based questionnaires (N=209) measured (a) the criteria students think are important in the selection of higher education courses and (b) three factors that might influence students' selections. Respondents were principally female (66%), employed full time (57%), and located in the U.S. (89%). The chi square goodness-of-fit test determined 40 criteria students think are important and exploratory factor analysis determined five common factors among the top 21 ...
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A Study of Graphically Chosen Features for Representation of TREC Topic-Document Sets

A Study of Graphically Chosen Features for Representation of TREC Topic-Document Sets

Access: Use of this item is restricted to the UNT Community.
Date: May 2000
Creator: Oyarce, Guillermo Alfredo
Description: Document representation is important for computer-based text processing. Good document representations must include at least the most salient concepts of the document. Documents exist in a multidimensional space that difficult the identification of what concepts to include. A current problem is to measure the effectiveness of the different strategies that have been proposed to accomplish this task. As a contribution towards this goal, this dissertation studied the visual inter-document relationship in a dimensionally reduced space. The same treatment was done on full text and on three document representations. Two of the representations were based on the assumption that the salient features in a document set follow the chi-distribution in the whole document set. The third document representation identified features through a novel method. A Coefficient of Variability was calculated by normalizing the Cartesian distance of the discriminating value in the relevant and the non-relevant document subsets. Also, the local dictionary method was used. Cosine similarity values measured the inter-document distance in the information space and formed a matrix to serve as input to the Multi-Dimensional Scale (MDS) procedure. A Precision-Recall procedure was averaged across all treatments to statistically compare them. Treatments were not found to be statistically the same and ...
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A study of on-line use and perceived effectiveness of compliance-gaining in health-related banner advertisements for senior citizens.

A study of on-line use and perceived effectiveness of compliance-gaining in health-related banner advertisements for senior citizens.

Date: December 2002
Creator: Toon, Michelle Anne
Description: This research investigated banner ads on the World Wide Web, specifically the types of messages used in those ads and the effectiveness of the ads as seen by their intended audience. The focus was on health-related banner advertisements targeting senior citizens. The study first sought to determine the frequency of appearance of those ads when classified into categories of compliance-gaining tactics provided by research scholars. Second, the study explored the relative perceived effectiveness among those categories. Two graduate students from a Central Texas university sorted text messages into predetermined compliance-gaining categories. Chi square tests looked for significant differences in the frequencies of banner ads in each category. Forty-five senior citizens from the Central Texas area completed surveys regarding the perceived effectiveness of a randomly ordered, randomly selected set of categorized banner ads. A repeated measures test attempted to determine whether some compliance-gaining strategies used in health-related banner ads were perceived as more effective than others. The hypothesis stated that there would be differences in frequencies of compliance-gaining strategies used among the compliance-gaining categories in health-related banner ads for senior citizens. The hypothesis was supported. The research question asked if some categories of compliance-gaining strategies used in health-related banner ads were ...
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A Study of the Competencies Needed of Entry-level Academic Health Sciences Librarians

A Study of the Competencies Needed of Entry-level Academic Health Sciences Librarians

Date: May 2012
Creator: Philbrick, Jodi Lynn
Description: The purpose of this study was to identify the professional and personal competencies that entry-level academic health sciences librarians should possess from the perspectives of academic health sciences library directors, library and information sciences (LIS) educators who specialize in educating health sciences librarians, and individuals who serve as both LIS adjunct faculty and practitioners in the field of health sciences librarianship. the first six research questions focused on the identification of professional and personal competencies, and the last two research questions focused on comparing and contrasting the three perspectives on the professional and personal competencies. the eight research questions were addressed through four rounds of the Delphi method. Three panels of experts, initially composed of 13 academic health sciences library directors, 8 LIS educators, and 8 LIS adjunct faculty adjunct faculty/health sciences librarianship practitioners, participated in the study, and most participants were female, white, in the age range of 45-64, had less than 20 years of experience in their respective careers, and were members of the Medical Library Association. the data collected from the rounds of the Delphi method were analyzed using descriptive statistics, including measures of central tendency, and non-parametric statistics, including the Kruskal-Wallis and Mann-Whitney U tests. Two ...
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A Study Of The Perception Of Cataloging Quality Among Catalogers In Academic Libraries

A Study Of The Perception Of Cataloging Quality Among Catalogers In Academic Libraries

Date: December 2011
Creator: Snow, Karen
Description: This study explores the concept of "quality" in library cataloging and examines the perception of quality cataloging among catalogers who work in academic libraries. An examination of the concept of "quality cataloging" in library science literature revealed that even though there is some general agreement on how this concept is defined, the level of detail and focus of these definitions often vary. These various perceptions were dissected in order to develop a framework for evaluating quality cataloging definitions; this framework was used to evaluate study participants' definitions of quality cataloging. Studying cataloger perceptions of quality cataloging is important because it is catalogers (particularly original catalogers) who are largely responsible for what is included in bibliographic records. Survey participants (n = 296) provided their personal definition of quality cataloging as well as their opinions on their department's cataloging, their influence upon their department's policies and procedures, and the specific data that should be included in a quality bibliographic record. Interview participants (n = 20) provided insight on how their opinions of quality cataloging were formed and the influences that shaped these opinions.
Contributing Partner: UNT Libraries
Supporting Computer-Mediated Collaboration through User Customized Agents

Supporting Computer-Mediated Collaboration through User Customized Agents

Date: December 2001
Creator: Ducksworth, Letatia Bright
Description: This research investigated a neglected problem - interruption of groups by agent advisory systems. The question was whether interruption by the agent advisory system was beneficial. A survey of literature in four areas is included in this dissertation. The areas surveyed were Agents, Online Help, Computer Supported Cooperative Work(CSCW) and Awareness in CSCW. Based on the review, a human subject experiment was conducted. The study investigated whether the style of agent advisory interface improved the performance of group members. There were three sets of groups, a control set that did not have advisory agents, a set that had system provided advisory agents and a set that had group customized advisory agents. The groups worked together using a CSCW application developed with GroupKit, a CSCW toolkit. The groups with group customized advisory agents used an Agent Manager application to define advisory agents that would give them advice as they worked in the CSCW application. The findings showed that the type of advisory agents did not significantly influence the performance of the groups. The groups with customized agents performed slightly better than the other groups but the difference was not statistically significant. When notified that advice was issued, groups with customized agents ...
Contributing Partner: UNT Libraries