Digital Commons Network^™

Subjective Quality Of Experience With The Internet: Accounting For Temporal Changes In User Acceptance Of Information Technology, Jason M. Turner

Theses and Dissertations

Contemporary information technology (IT) related research has focused on use as a key dependent measure for valuing IT. By understanding the determinants of IT use, we gain descriptive information about successful IT, and prescriptive information for better deploying IT resources. Although there are several competing theories regarding IT use, research findings often cite their inability to account for temporal changes in usage behaviors. This thesis introduces quality of experience as a potential moderator between the determinants of use and actual usage behaviors. A pilot survey concerning Internet usage generated potentially relevant items which were later refined into a questionnaire assessing …

A Performance Analysis Of The Faugeras Color Space As A Component Of Color Histogram-Based Image Retrieval, Chad A. Vander Meer

Theses and Dissertations

The use of color histograms for image retrieval from databases has been implemented in many variations. Selecting the appropriate color space for similarity comparisons is an important part of a color histogram technique. This paper serves to introduce and evaluate the performance of a color space through the use of color histograms. Performance is evaluated by correlating the similarity results obtained from various color feature vector techniques (including color histgramming) to those gathered through a human perceptual test. The perceptual test required 36 human subjects to evaluate the similarity of 10 military aircraft images. The same 10 images were also …

Microprogramming A Writeable Control Memory Using Very Long Instruction Word (Vliw) Compilation Techniques, Randall S. Whitman

Theses and Dissertations

Microprogrammed Digital Signal Processors (DSP) are frequently used as a solution to embedded processor applications. These processors utilize a control memory which permits execution of the processor's instruction set architecture (ISA). The control memory can take the form of a static, read only memory (ROM) or a dynamic, writeable control memory (WCM), or both. Microcoding the WCM permits redefining the processor's ISA and provides speedup due to its instruction level parallelism (ILP) potential. In the past, code generation efforts for microprogrammable processors focused on creating assembly and microcode as two separate steps. In this thesis an alternative approach was chosen …

Modeling The Uptake And Transpiration Of Tce Using Phreatophytic Trees, Douglas P. Wise

Theses and Dissertations

Phytoremediation is a recent addition to the numerous methods used today to remediate ground water contaminants. It is proving more effective and efficient compared to existing remediation techniques. The use of phreatophytes, or water seeking trees, has great potential for phytoremediation. These trees are fast growing, long lived, grow their roots down to the ground water table, transpire large amounts of water, and are proven to actively remove contaminants from the soil horizon. The purpose of this research is to develop quantitative concepts for understanding the dynamics of TCE uptake and transpiration by phreatophytic trees over a short rotation woody …

A System Dynamics Model Of The Bioavailability Of Metals In Constructed Wetland Sediment, Timothy S. Wood

Theses and Dissertations

Constructed wetlands used for storm water treatment accumulate metals primarily in their sediment. This sediment has the potential to produce toxic effects in benthic organisms at some period in time. Bioavailability of metals in sediment is directly linked to pore water metal activity. The mechanisms that influence pore water metal activity are included in physical, chemical, and biological processes. A system dynamics model was developed to represent these processes and the major influences affecting pore water metal activity in a treatment wetland receiving storm water influent. The model structure and behavior was tested and validated using several system dynamics validation …

Modeling And Simulation Support For Parallel Algorithms In A High-Speed Network, Dustin E. Yates

Theses and Dissertations

This thesis investigates the ability of a simulation model to compare and contrast parallel processing algorithms in a high-speed network. The model extends existing modeling, analysis, and comparison of parallel algorithms by providing graphics based components that facilitate the measurement of system resources. Simulation components are based on the Myrinet local area network standard. The models provide seven different topologies to contrast the performance of five variations of Fast Fourier Transform (FFT) algorithms. Furthermore, the models were implemented using a commercially developed product that facilitates the testing of additional topologies and the investigation of hardware variations. Accurate comparisons are statistically …

Spontaneous Emission In Microcavity Lasers, Dustin Philip Ziegler

Theses and Dissertations

An understanding of spontaneous emission processes within microcavities is crucial in addressing the need to make tomorrow's microlasers more efficient. One approach to improving the device efficiency is to reduce the threshold input energy at which lasing begins to occur. It has been suggested that the threshold in a microcavity laser can be decreased by increasing the fraction of spontaneous emission into the lasing mode, this can be accomplished by preferentially coupling the gain medium of the laser to the electromagnetic cavity mode of interest. It therefore becomes necessary to understand the mechanism by which this coupling takes place. This …

Measurement Of Ultrafast Carrier Recombination Dynamics In Mid-Infrared Semiconductor Laser Material, William T. Cooley

Theses and Dissertations

Shockley-Read-Hall, radiative, and Auger recombination rates in mid-infrared laser structures are measured and reported using time resolved photoluminescence (TRPL) frequency upconversion. The mid-IR lasers studied were actual InAsSb/InAlAsSb multiple-quantum-well (MQW) diode lasers emitting near 3.3 micrometers which were previously characterized for laser performance. This effort extends the initial studies and reports on the carrier recombination dynamics. Shockley-Read-Hall, radiative and Auger recombination rates at low temperature (77 K) were measured and found to be A_SRH ≈ 10 x 10⁷sec^-1, B_rad ≈ 2 x 10^-10 cm³sec^-1 and C_Auger < 10^-29 cm^{6 …}

Flight Physician - December, 1997, Civil Aviation Medical Association

Browse all Civil Aviation Medical Association Newsletters

A fourteen page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.

Pseudogap And Incommensurate Magnetic Fluctuations In Yba2cu3o6.6, Pengcheng Dai, Herbert A. Mook, Fatih Dogan

Materials Science and Engineering Faculty Research & Creative Works

Unpolarized inelastic neutron scattering is used to study the temperature and wave vector dependence of the dynamical magnetic susceptibility, X"(q, w), of a well-characterized single-crystal YBa2Cu3O6.6 (Tc = 62.7 K). We find that a pseudo gap opens in the spin-fluctuation spectrum at temperatures well above Tc. We speculate that the appearance of the low-frequency incommensurate fluctuations is associated with the opening of the pseudo gap. To within the error of the measurements, a gap in the spin-fluctuation spectrum is found in the superconducting state.

Within-Season Dispersal, Nest-Site Modification, And Predation In Renesting Hooded Warblers, Joan S. Howlett, Bridget J. M. Stutchbury

Wilson Bulletin

No abstract provided.

Evaluation Of Road Weather Information System: Interim Report, Joel M. Weber, R. Clark Graves, Jerry G. Pigman

Kentucky Transportation Center Research Report

The objectives of this study are to monitor and evaluate the Roadway Weather Information System (RWIS). Six RWIS sites have been installed at locations selected by the Kentucky Department of Highways. Each site includes sensors which measure temperature, precipitation, relative humidity, wind speed, pavement temperature, surface condition, and chemical concentration. The data can be accessed remotely using a Windows-based software program. The data are also stored in a central database for future use.

A preliminary reliability study has been completed for five of the sites, and data are being collected for a more extensive reliability assessment. The accuracy of the …

Field Validation Of A Traffic Management Software, Michael Mcdonald

McNair Scholars Research Journal

No abstract provided.

Device Independent Color Imaging Modules For Iris Explorer, Christopher Hauf

Theses

Having a flexible and expandable system of interconnecting modules which create device independent color image processing chains is a powerful tool for color science research and education. The objective of this research was to see if there existed a commercially available application which would provide the framework for such a system, learn that application, build a system of device independent imaging modules, and document the process so future developer's could easily expand the system. The Numerical Algorithms IRIS Explorer software proved to be the best fit for the system since it offered an intuitive user interface, a powerful set of …

Lb 1085 Report To The Nebraska Unicameral For Dodge, Douglas, Sarpy, Saunders And Washington Counties: Multi-County Shared Services Project, Center For Public Affairs Research (Cpar)

Publications

The 1996 session of the Nebraska Unicameral enacted several bills focusing on the organization and cost of local governments. One bill-LB 1085--provided new, more specific language and procedures governing county consolidation and service cooperation. Coupled with the new language and procedures was a requirement that each county complete by January, 1998 a study of whether property taxes might be reduced through the consolidation of offices, services and/or county governments.

Edison Communicator Volume Three; Number Five, Edison Community College

Edison Communicator

Edison Communicator: A Publication for the Faculty, Staff and Friends of Edison Community College.

The Effects Of A Cooperative Learning Environment On Attitudes, Social Skills, And Processing Of Baccalaureate Nursing Students, Mary J. Cairy

Dissertations

The purpose of this study was to examine the effect of a deliberate, planned cooperative learning environment on the attitudes, social skills, and processing of baccalaureate nursing students. A convenience sample of 43 students (Registered Nurses) randomly assigned to one of eight cooperative learning groups were the subjects for this study. Cooperative learning was used as a teaching methodology for the entire class of 15 weeks duration. The study sought to answer the following questions: (a) What effect does a deliberate, planned cooperative learning environment have on the attitudes of BSN (Baccalaureate of Science in Nursing) students toward group work? …

Theoretical And Conceptual Lacunae In Sociological Theories Of Development: The Puerto Rican Anomaly, Dennis Malaret

Dissertations

Puerto Rico is presently facing serious economic and social problems which are characteristic of a neocolony. Many of these problems are associated with Puerto Rico's historical path of industrial development adopted in 1940s. This study, therefore, focuses on economic and development policies implemented in Puerto Rico since the early 1900s and the political and economic role the U.S. has played in such policies.

To understand Puerto Rico's structural problems, a theoretical framework has been developed. This framework combines developmentalist theories such as modernization, dependency, capitalist world economy and indigenous Puerto Rican theorizing. These theories have been critically assessed for their …

Dialogue: December 1997, Staff And Writers Of Dialogue

Dialogue

Gallery

cover — Fat bottom bees, you make this rockin' world go round — Nora Lagerway
05 — nudie — John Den Hartigh
07 — After Richard — Carin Palsrok
11 — L.A.G.W.A.F.I.S. — Mark Johnson
19 — Victoria Harbor, Hong Kong — Peter Szto
21 — The Harvester — Jacoba Sytsma
22 — Playtime in a Vase — Elizabeth Duffield
26 — Bodyscape #117 — Steve Smith
29 — Nucleaer Arms — Christina Bratt
33 — Solitude — Greg Scholtens
35 — Untitled — Diane Gillenwater
37 — Willie — Jeff Casemier

Poetry

06 — 21 lines on water …

Public Participation Program Development: An Analysis Of Public Participation In The Water Industry, Marcia Lynne Holmberg

UNLV Theses, Dissertations, Professional Papers, and Capstones

The field of public participation is a distinct, but yet unpolished facet within the public relations industry. While the purpose of and need for public participation are becoming increasingly clear, many remain unaware or unconvinced of its advantages. Likewise, even among those who endorse the necessity of public participation, its methods and strategies continue to be a mystery to most.

One industry, in particular, that has recognized and embraced the benefits of conducting public participation is the water utility industry. The purpose of this thesis is to 1) crystallize the understanding of why public participation is a necessary and advantageous …

A Plan For Characterizing Waste For The Defense Special Weapons Agency At The Nevada Test Site, Tiffany A. Hatcher

UNLV Theses, Dissertations, Professional Papers, and Capstones

In 1976, Congress adopted the Resource Conservation and Recovery Act (RCRA) to govern hazardous waste. The Act was amended in 1984 with the Hazardous and Solid Waste Amendments in order to further define the requirements of RCRA. RCRA is meant to protect human health and the environment from the effects of hazardous waste, promote waste minimization, and encourage material recycling and recovery. For this purpose, regulations are implemented that cover every aspect of the hazardous waste problem, including generation, transport, treatment, storage, and disposal.

Generators of waste are the most important part of this chain. As defined in RCRA, a …

Reading, Writing, And Multimedia: A Writing Portfolio, Kathy A. Lynn

Digitized Theses and Dissertations (prior to 2008)

A portfolio submitted in partial fulfillment of the requirements for the degree Arts in Professional Writing in the Department of English in the College Humanities, and Social Sciences of Kennesaw State University. December 1997.

University Reporter - Vol. 02, No. 04 - December 1997, University Of Massachusetts Boston

1996-2009, University Reporter

No abstract provided.

Gender, Ethnicity And Space: The Case Of Racial Ethnic Minority Women Telecommuters In Omaha, Ne, Hope Kawabata

Student Work

Telecommuting is a labor process in which employees work from home on a regular basis, but maintain contact with the office through telecommunications technology such as computer networks, facsimile machines, voice messaging systems, and so on. Telecommuting has become very popular in recent years; however, little is known about its social and spatial impacts. Preliminary research on gender and telecommuting has shown that telecommuting tends to reinforce a traditional division of domestic labor and identification of women with the home; however, whether this is the case for ethnic minority women is unknown. This thesis research used in-depth, semistructured interviews to …

New Perspectives For Maximum Likelihood Time-Delay Estimation, John A. Stuller

Electrical and Computer Engineering Faculty Research & Creative Works

This Paper Introduces a New Realization for Maximum Likelihood Time-Delay Estimation (TDE) that Illuminates the Relationships between Maximum Likelihood TDE and Other Methods. We Obtain the Result by Deriving the Likelihood Function using a Fundamental Method that Appears to Be New to the Field of Array Processing. This Method is a Natural Complement to the Generalized Karhunen-Loève Expansion. © 1997 IEEE.

The Collegian (1997-12), Ginger James

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 50, No. 6

Pressure Impulses During Microsecond Laser Ablation, Hanqun Shangguan, Lee W. Casperson, Scott A. Prahl

Electrical and Computer Engineering Faculty Publications and Presentations

The collapse of laser-induced cavitation bubbles creates acoustic transients within the surrounding medium and also pressure impulses to the ablation target and light-delivery fiber during microsecond laser ablation. The impulses are investigated here with time-resolved flash photography, and they are found to occur whether or not the light-delivery fiber is in contact with the target. We demonstrate that the impulses depend primarily on the energy stored in the cavitation bubble. They are not directly dependent on the mode of light delivery (contact versus noncontact), and they are also not directly correlated to the other acoustic transients. The pressure impulses do …

Measured Energy Savings Of A Comprehensive Retrofit In An Existing Florida Residence, Florida Solar Energy Center, Charles Withers, Jr.

FSEC Energy Research Center®

Simulation analysis suggests that electricity consumption can be reduced up to 40% in existing Florida homes with judicious use of methods to reduce loads, as well as more efficient equipment. To test this theory, an all-electric home was located in Miami, Florida upon which to perform a variety of retrofits. The total annual electricity consumption in the one year base-line period preceding the study was 20,733 kWh. Although high, this is not unusual for a South Florida home with a swimming pool since pool pumping often accounts 3,000 -4,000 kWh per year. Detailed instrumentation and metering equipment was installed in …

Operational Report 1997, University Of Montana--Missoula

University of Montana Annual Financial Reports, 1918-2012

University of Montana annual financial report for fiscal year ending June 30, 1997.

20 Questions Toward Better Thinking: A Look At Internet Based Learning, Robert B. Mendelsohn

Critical and Creative Thinking Capstones Collection

New technology and good teaching practices must be combined to produce the most up-to-date and effective Internet-based learning. Critical and creative thinking techniques incorporated with technological enhancements will stimulate better comprehension of a variety of resources including in Internet-based learning. Two key concepts of critical and creative thinking that I focus on are Metacognition and Frame of Reference. Metacognition is the self-awareness of one’s thought process. It includes knowing why one makes decisions, what factors contribute to a choice, and why the opposite decision was not chosen. While most people disregard or ignore metacognition it can have numerous positive effects …