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1,945 Matching Results
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Benchmark-based Page Replacement (BBPR) Strategy: A New Web Cache Page Replacement Strategy
World Wide Web caching is widely used through today's Internet. When correctly deployed, Web caching systems can lead to significant bandwidth savings, network load reduction, server load balancing, and higher content availability. A document replacement algorithm that can lower retrieval latency and yield high hit ratio is the key to the effectiveness of proxy caches. More than twenty cache algorithms have been employed in academic studies and in corporate communities as well. But there are some drawbacks in the existing replacement algorithms. To overcome these shortcomings, we developed a new page replacement strategy named as Benchmark-Based Page Replacement (BBPR) strategy, in which a HTTP benchmark is used as a tool to evaluate the current network load and the server load. By our simulation model, the BBPR strategy shows better performance than the LRU (Least Recently Used) method, which is the most commonly used algorithm. The tradeoff is a reduced hit ratio. Slow pages benefit from BBPR.
Date:
May 2003
Creator:
He, Wei
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Woven Music
When I am weaving I listen to music and notice that my hands and feet fall into a rhythm. This connection reminds me of playing the piano. I took a closer look at weaving drafts; the movement of the threading setup reminded me of the notes on musical scores. This relationship inspired me to see what textures I could achieve by actually weaving the musical notes. The focus of my study is the exploration of the relationships between weaving and music utilizing elements and principles found in both, such as: color, texture, form, repetition, rhythm, and time. Both music and color produce emotional responses and will be taken into consideration within the weavings.
Date:
May 2003
Creator:
Jackson, Melanie S.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Memento
Chapter 1 describes my previous jewelry work related to my interest in body parts and other materials as medium and lockets. The questions in the statement of problem deal with how the use of a specific body site, color and incorporation of body parts in my jewelry make my work more intimate to the wearer. Chapter 2 discusses the work I focused around the questions proposed in Chapter 1. Important points are: a more focused way of using specific body sites to support my ideas, the use of different skin colors in my work, and the physical effect of my jewelry to the wearer. Chapter 3 expresses my own criticism about the work and my future goals after this project.
Date:
May 2003
Creator:
Kataoka, Masumi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Experiencing the view.
This article discusses the way people experience the landscape. Tracing the progress of landscape photography from the late nineteenth century to the present, the author introduces the way concepts in landscape photography have changed. The author's photographs are discussed regarding how they build on the foundation of this historical precedent. Using photographs of individuals at places they think are special, the author examines their perception of landscape. The positions and actions of the subjects shape the way their attitudes are conveyed. The concept of beauty is discussed as it relates to the appreciation of landscape. By discussing with the subjects why these places are special and photographing with the intent to convey what those reasons are, the author's photographs examine the relationship of people to the landscape.
Date:
May 2003
Creator:
Madsen, Michael J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
DICOM Image Scrubbing Software Library/Utility
This software is aimed at providing user-friendly, easy-to-use environment for the user to scrub (de-identify/modify) the DICOM header information. Some tools either anonymize or default the values without the user interaction. The user doesn't have the flexibility to edit the header information. One cannot scrub set of images simultaneously (batch scrubbing). This motivated to develop a tool/utility that can scrub a set of images in a single step more efficiently. This document also addresses security issues of the patient confidentiality to achieve protection of patient identifying information and some technical requirements
Date:
May 2003
Creator:
Ponnam, Bhavani Srikanth
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Agent-Based Architecture for Web Deployment of Multi-Agents as Conversational Interfaces.
Agent-based architecture explains the rationale and basis for developing agents that can interact with users through natural language query/answer patterns developed systematically using AIML (artificial intelligence mark-up language) scripts. This thesis research document also explains the architecture for VISTA (virtual interactive story-telling agents), which is used for interactive querying in educational and recreational purposes. Agents are very effective as conversational interfaces when used along side with graphical user interface (GUI) in applications and Web pages. This architecture platform can support multiple agents with or with out sharing of knowledgebase. They are very useful as chat robots for recreational purposes, customer service and educational purposes. This platform is powered by Java servlet implementation of Program D and contained in Apache Tomcat server. The AIML scripting language defined here in is a generic form of XML language and forms the knowledgebase of the bot. Animation is provided with Microsoft® Agent technology and text-to-speech support engine.
Date:
May 2003
Creator:
Pothuru, Ranjit Kumar
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Security problems in 802.11 wireless networks standard due to the inefficiency of wired equivalent privacy protocol.
Due to the rapid growth of wireless networking, the fallible security issues of the 802.11 standard have come under close scrutiny. Nowadays most of the organizations are eager to setup wireless local area networks to reduce the hassles of limited mobility provided by conventional wired network. There are serious security issues that need to be sorted out before everyone is willing to transmit valuable corporate information on a wireless network. This report documents the inherent flaws in wired equivalent privacy protocol used by the 802.11 standard and the ensuing security breaches that can occur to a wireless network due to these flaws. The solutions suggested in this report might not actually make the 802.11 standard secure, but will surely help in the lead up to a secure wireless network standard.
Date:
May 2003
Creator:
Samanthapudi, Varma
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Analysis of Japanese Exports and Imports of Rice
This research shows that the Japanese rice policy has affected the volume of exported and imported rice; moreover, multilateral and bilateral agreements have also affected Japanese rice policy. Japan's institution of subsidies and trade barriers has made its rice products too expensive for foreign trade and its domestic consumers. Since the WTO agreement has forced Japan to open its market gradually over six years, Japan may be unable to compete internationally because of its limited land, high labor costs, and the field utility fees.
Date:
May 2003
Creator:
Shiraiwa, Toshio
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Precision measurements of the hyperfine structure in the 23P state of 3He.
The unusually large hyperfine structure splittings in the 23P state of the 3He isotope is measured using electro-optic techniques with high precision laser spectroscopy. Originally designed to probe the fine structure of the 4He atom, this experimental setup along with special modifications I implemented to resolve certain 3He related issues has made possible new high precision hyperfine structure measurements. Discussed are the details of the experimental setup and the modifications, including in depth information necessary to consider while performing these measurements. The results of these hyperfine structure measurements give an order of magnitude improvement in precision over the best previously reported values.
Date:
May 2003
Creator:
Smiciklas, Marc
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Technology, Ontology, and Pop
This problem in lieu of thesis outlines a body of work that uses technology and pop elements to discover ways to understand what it means to be human. In doing so it expands the interpretation of technology, ontology, and pop, and allowed the artist to find an essential balance between the three. It details the understanding of these borrowed aesthetics and their connection to the creative process.
Date:
May 2003
Creator:
Tosten, Erik
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Feasibility of Multicasting in RMI
Due to the growing need of the Internet and networking technologies, simple, powerful, easily maintained distributed applications needed to be developed. These kinds of applications can benefit greatly from distributed computing concepts. Despite its powerful mechanisms, Jini has yet to be accepted in mainstream Java development. Until that happens, we need to find better Remote Method Invocation (RMI) solutions. Feasibility of implementation of Multicasting in RMI is worked in this paper. Multicasting capability can be used in RMI using Jini-like technique. Support of Multicast over Unicast reference layer is also studied. A piece of code explaining how it can be done, is added.
Date:
May 2003
Creator:
Ujjinihavildar, Vinay
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
User Modeling Tools for Virtual Architecture
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.
Date:
May 2003
Creator:
Uppuluri, Raja
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Tangible Struggle
The focus of my graduate work was to find my own voice through my continued efforts in woodcarving. I proposed to produce six to eight wood carved sculptures for my thesis that would be dealing with a juxtaposition of struggle expressively portrayed by the figure between two-dimensional and three-dimensional worlds. I used these works to express my emotions about myself, and my interactions with others in a form of nonverbal communication with the viewer. The result of this process did lead me to find my own voice and with this voice I expressed three-dimensionally, not only my own struggles, but also those that many other women have experienced as well.
Date:
May 2003
Creator:
Whelan, Shawn
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Students' Perception of Videoconference Courses: A Case Study of the University of North Texas
Access:
Use of this item is restricted to the UNT Community
The objective of the survey is to observe students' perceptions of videoconference courses offered by the University of North Texas (UNT). The perceptions of 348 students enrolled in videoconferencing (VC) courses in the fall 2002 semester were obtained through a 29-item course evaluation questionnaire. From this study, I conclude generally that UNT students perceive videoconference courses as a positive stride in providing classes. While it was expected that students at remote sites would experience greater technological problems and lower levels of student/teacher interaction, evaluations from remote sites indicate higher degrees of student satisfaction than those students taking VC courses at the main campus location.
Date:
May 2003
Creator:
Christopher, Chris-Junior
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Organic Revelations
Access:
Use of this item is restricted to the UNT Community
Recently my creative process has led to a new area of investigation and exploration. I have discovered that I enjoy the unexpected occurrences that happen while painting. I have an appreciation for the parts of my works that do not follow the preliminary sketch and are produced more subconsciously. While usually this aspect has been restricted by the adherence to a preliminary sketch and narrative, the new works explore these occurrences more fully. In the new works, I worked in a more spontaneous manner to create work that does not focus strictly on narrative but reveals itself more as a journey or exploration.
Date:
May 2003
Creator:
Jones, Paul David
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Production Effects of Protectionist Announcements: An Examination of the Steel Industry
Access:
Use of this item is restricted to the UNT Community
The well-being of the American steel industry is vital to the overall health of the United States (U.S.) economy. This belief is, in part, the impetus for the enactment of protective tariffs and quotas. This paper examines the impact of the announcement of the 2001 tariffs. Numerous forces have buffeted the U.S. steel industry over the last decade. Domestic steel firms operate in a highly global, fiercely competitive, and capital-intensive industry. This environment has proven inhospitable to the U.S. steel industry, widely criticized for inefficiency and overcapacity. A regression analysis finds that the announcement of the 2001 tariffs had no statistically significant impact on U.S. domestic raw steel production. Supporting theories are reexamined, and the implications of this finding for trade policy are explored.
Date:
May 2003
Creator:
Pharr, Matthew C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Study and Sample Implementation of the Secure Shell Protocol (SSH)
Access:
Use of this item is restricted to the UNT Community
Security is one of the main concerns of users who need to connect to a remote computer for various purposes, such as checking e-mails or viewing files. However in today's computer networks, privacy, transmission to intended client is not guaranteed. If data is transmitted over the Internet or a local network as plain text it may be captured and viewed by anyone with little technical knowledge. This may include sensitive data such as passwords. Big businesses use firewalls, virtual private networks and encrypt their transmissions to counter this at high costs. Secure shell protocol (SSH) provides an answer to this. SSH is a software protocol for secure communication over an insecure network. SSH not only offers authentication of hosts but also encrypts the sessions between the client and the server and is transparent to the end user. This Problem in Lieu of Thesis makes a study of SSH and creates a sample secure client and server which follows SSH and examines its performance.
Date:
May 2003
Creator:
Subramanyam, Udayakiran
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Restructuring of the Electric Power Industry in California and in Texas: An Examination and Comparison of Deregulation as Legislated
California legislated the restructuring of its electric power industry in 1996. Deregulation was successful until 2000 when crisis, caused by a number of outside forces and flawed legislation, sent wholesale electric prices skyrocketing. Restructuring of the electricity sector in Texas occurred in two phases. The first phase began in 1995, when wholesale markets were opened to competition; the second phase began June 18, 1997, when the 1999 Texas Electric Choice Act, was signed into law. Deregulation has largely been successful in Texas. This analysis examines the legislation of these states and how they differed, setting the stage for one unsuccessful and one successful move to retail competition in the electricity industry.
Date:
August 2003
Creator:
Lewis, Rebecca Joy
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Plan Types and Their Effect on Retirement Patterns
In 1993, 38.9 million people were covered by a 401(k) plan, up from 7.1 million in 1983. The rapid growth of 401(k) and other defined contribution pension plans may alter retirement patterns of older workers. Previous research showed that the spread of defined benefit plans, with sharp age-related incentives first discouraging and later encouraging retirement, contributed to the early retirement trend of past decades. Defined contribution plans differ along several dimensions, especially in their smooth rate of pension wealth accrual. Data from the Health and Retirement Study show that retirement patterns have begun to change as defined contribution plans have spread. Estimates indicate that the financial incentives in defined benefit pensions lead people to retire almost two years earlier, compared to people with defined contribution plans.
Date:
August 2003
Creator:
Marrone, Mickey M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Analysis and expression of the cotton gene for the D-12 fatty acid desaturases 2-4 (FAD2-4)
A genomic clone containing a 16.9-kb segment of cotton DNA was found to encompass a D-12 fatty acid desaturases (FAD2-4) gene. The FAD2-4 gene has a single, large intron of 2,780 bp in its 5'-untranslated region, just 12 bp upstream from the ATG initiation codon of the FAD2-4 opening reading frame. A number of prospective promoter elements, including several light-responsive sequences, occur in the 5'-flanking region. The coding region of the gene is 1155 bp with no introns, and would encode a FAD2-4 polypeptide of 384 amino acids. The putative protein had four membrane-spanning helices, hallmarks of an integral membrane protein, and would probably be located in the endoplasmic reticulum. The FAD2-4 gene is indeed a functional gene, since yeast cells transformed with a plasmid containing the coding region of the gene synthesize an appreciable amount of linoleic acid (18:2), not normally made in wild-type yeast cells. The FAD2-4 gene has many structural similarities to the cotton FAD2-3 gene that was also analyzed in this laboratory.
Date:
August 2003
Creator:
Park, Stacy J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Stitch as Art Object
Chapter 1 discusses how the concept of the stitch as art object evolved. The question in the statement of problems concerned the use of design principles on the stitch and the perception of the stitch by the viewer. Chapter 2 discusses the various processes involved in creating the works to answer the proposed questions, and discusses the use of literalism in the concept of the works. Chapter 3 discusses what was learned from the experience.
Date:
August 2003
Creator:
Stephens, Rebekah
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Transformation of Materials and Representation of the Idea of the Baby Doll
I want to find a balance within the juxtaposition of representational imagery, patterned fabric, stain and found objects, which effectively communicates the ideas of my work, yet still provides a visually interesting object/painting. How do my materials relate to the content and/or meaning of the work? How will focusing on a single subject affect the development and visual content of my painting? How will I choose representational images to use in relation to the aims of my subject? I was struck by the connections between the baby doll and the real baby. The baby doll became a representation of an idealized body. My interest in baby doll source materials evolved through several different stages, beginning with drawings of baby dolls, then actual doll parts, and finally to imagery of babies with genetic defects. Formally, the work was able to progress as the idea or content progressed.
Date:
August 2003
Creator:
Wehring, Brad
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Origami in Fashion
The focus of my work is the incorporation of three-dimensional sculptural forms into the design of my garments while still maintaining the functional purpose of the garment. Origami paper folding is the inspiration for the sculptural forms. The major endeavor was to explore and solve the relationship between the organic human forms and the geometric forms created by the origami paper folds. This presented a challenge of exact precision. During this process, I experimented with different fabrics, which can accommodate the sharp creases and retain the shape. A variety of folding patterns were also explored. Although the design should be innovative and creative, the final garment must be wearable and comfortable.
Date:
August 2003
Creator:
Wu, Chia-Lin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Study of Gate Electrode Materials on High K Dielectrics
This problem in lieu of thesis report presents a study on gate electrode materials on high K dielectrics, including poly-SiGe and Ru. The stability of poly-SiGe in direct contact with Hf silicon-oxynitride (HfSiON) is studied by rapid thermal annealing (RTA), Rutherford backscattering spectrometry (RBS), X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM). By performing a series of RTA treatments we found that as RTA thermal budgets reach 1050 C for 30s, the poly-SiGe layer begins to intermix with the HfSiON film, as observed by TEM. The maximum annealing condition for the Hf0.14Si0.23O0.46N0.17 film to remain stable in contact with poly-SiGe is 1050 C for 20s in high purity N2(99.9%) ambient. We also found that after 1000 C annealing for 60s in a nitrogen ambient, the poly-SiGe crystal phase structure was changed from a columnar structure to a large grain structure. For a metal gate, Ru was studied to determine N2annealing effects on sheet resistance of Ru sample electrodes and electrical characterization of Ru/HfSiOx/Si stack. Results show that a pure Ru metal gate is not a good choice for high k materials since it is hard to etch off, and different annealing conditions can cause large changes in …
Date:
August 2003
Creator:
Yao, Chun
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library