Digital Commons Network^™

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 …}

Averaged Motion Of Charged Particles In A Curved Strip, Avner Friedman, Chaocheng Huang

Mathematics and Statistics Faculty Publications

This paper is concerned with the motion of electrically charged particles in a "curved" infinite strip.

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.

The Process And Implications Of Doing Qualitative Research: An Analysis Of 54 Doctoral Dissertations, Carl Brun

The Journal of Sociology & Social Welfare

The number of social work doctoral dissertations following qualitative research methods tripled in the ten year period from 1982 to 1992. The purpose of the current study was to understand the qualitative research process of 54 social work dissertations completed between 1986 and 1993. The two general reasons for following a qualitative design were the researcher's dissatisfaction with current theory to explain the studied phenomena and the desire to implement participantd riven research.M uch was written by the dissertation authors about the place of theory in qualitative research and the mutual influences between the researcher and researched. The study results …

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.

Vertical Axis Rotation In The Silurian Hills: A Cenozoic Overprint On The Mesozoic U.S. Cordilleran Magmatic Arc, John E. Comstock

LSU New Orleans Theses and Dissertations

New, detailed field work in the Silurian hills, southeast of Death Valley, reveals a pattern of a complex Cenozoic brittle fault overprint of rocks containing evidence of at least three episodes of Mesozoic thermal-ductile deformation. The Cenozoic brittle fault overprint of rocks containing evidence of at least three episodes of Mesozoic thermal-ductile formation. The Cenozoic faulting consists of five distinct sets of structures ordered by cross cutting relationships. The oldest, BF1, are fragments of reverse faults trending NW and dipping 45-60 SW. BF2 consist of NW trending, en echelon, sinistral strike-slip faults. BF3 is a conjugate set of N-NE trending …

Misdirected Incubation In American Kestrels: A Case Of Competition For Nest Sites?, Russell D. Dawson, Gary R. Bortolotti

Wilson Bulletin

No abstract provided.

Woodpecker Abundance And Habitat Use In Three Forest Types In Eastern Texas, Clifford E. Shackelford, Richard N. Conner

Wilson Bulletin

No abstract provided.

Notes From The Director, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

The Greatest Battle, Vickie Kuykendall

McNair Scholars Research Journal

No abstract provided.

Surveillance And Alien/Nation: The X-Files And The "Other" Government, Leesa Young

McNair Scholars Research Journal

No abstract provided.

The Persistent Vegetative State: A View Across The Legal Divide, H. Richard Beresford

Cornell Law Faculty Publications

Praise for Fred Plum can take many forms: for pedagogical dynamism, for depth and breadth of contributions to neurology and neuroscience, for sure-handed guidance of a department that has infused neurology with today’s and tomorrow’s leaders, and for a truly uncanny ability to fan a drive to excel in those he has touched. Mindful of his admonition to be substantive in what one says and does, my praise will embody a few reflections on the enduring legal and social impact of the “point of view” he and Bryan Jennett authored for the journal Lancet in 1972.

The Rediscovery Of Grounded Theory: Strategies For Qualitative Research In Adult Education, Wayne A. Babchuk

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Grounded theory is becoming an increasingly popular research methodology for use in adult education and other forms of educational inquiry, yet there is currently considerable disagreement among its co-founders concerning the implementation of this approach. Reflective of this ambiguity and to further confuse matters for the potential grounded theorist, educators who have used this methodology in the field often operationalize grounded theory’s procedures and practices according to their own interpretations and contextualiy-specific research needs. Moreover, these analysts often do not thoroughly document the specifics of their research, often failing to provide information concerning the methodological decisions they surely must have …

Diabetes And Exercise: The Role Of The Athletic Trainer, Carolyn C. Jimenez

Sports Medicine Faculty Publications

No abstract provided.

Table Of Contents, Vol. 16, No. 2, December 1997

Bridgewater Review

No abstract provided.

Bridgewater Review, Vol. 16, No. 2, December 1997

Bridgewater Review

No abstract provided.

University Of San Diego News Print Media Coverage 1997.12, University Of San Diego Office Of Public Relations

Print Media Coverage (1947-2009)

Printed clippings housed in folders with a table of contents arranged by topic.

Castor Canadensis Winter 1997, Jed Smith Society

Castor Canadensis - Jedediah Smith Society

No abstract provided.

An Analysis Of Police Perceptions Of Community Policing And Female Officers, Rhonda Kaye Delong

Dissertations

Traditional and community policing differ in their approach to crime and other social concerns. Traditional policing emphasizes reactive response and enforcement while community policing emphasizes proactive response and community partnership. Often, these two types of departments select officers with specific characteristics which fit well with the philosophy of the department. Characteristics such as age, education, years of military experience, rank, years of police experience, type of department, and family members in the military and the police are examined in this study to determine perceptual differences among officers regarding the community policing philosophy and the role of women in policing. A …

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? …

Differences In Perceptual And Subjective Body Image Between Weight Cycling And Noncycling Graduate Students, Karen Casebeer

Dissertations

This research began as an exploratory investigation into body image differences between individuals who were weight cyclers and those who were noncyclers. Participants were fem ale and m ale graduate students (n= 444) who completed the Multidimensional Body-Self Relations Questionnaire (Cash, 1990a), the Contour Drawing Rating Scale (M.A. Thompson & Gray, 1995), and the Weight History Questionnaire (W H Q ), a researcher developed self-report survey of weight, dieting, and demographic information. Data gathered from the WHQ were used to identify pairs of individuals who were matched on cycling status, gender, age, and body mass index. Fifteen such pairs were …

An Assessment Of Generalization Across Settings Of A Parenting Strategies Program For Adhd Children, Barbara M. Todd-Nelson

Dissertations

When collapsed across gender and subject pools, Attention-Deficit/ Hyperactivity Disorder (ADHD) affects three to five percent of school-aged children (DSMIV, 1994). Intervening upon environmental contingencies for ADHD-diagnosed children is one of the least intrusive forms of treatment and is often very effective (Atkeson & Forehand, 1978; Forehand & King, 1977; Barkley, 1986; Webster-Stratton, 1993). As noted by many researchers (Allen, Tamowski, Simonian, Elliott & Drabman, 1991; Drabman, Hammer, & Rosenbaum,1979; Stokes & Osnes, 1989), it is necessary to assess generalization of treatment effects across the behavior therapy literature. Few have examined generalization from the home setting to the classroom. Since …

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 …

Affective Orientation, Alexithymia, And Multidimensional Empathy In Counselors-In-Training, Terrilyn J. Krueger

Dissertations

The purpose of this study was to investigate the predictive relationship between two affective measures, affective orientation and alexithymia, and five empathy measures in 67 master’s degree level counselor trainees. It was hypothesized that affective orientation would be predictive and alexithymia inversely predictive of five distinct dimensions of empathy: communicated, observed, emotional, cognitive, and relational. Communicated empathy was measured by trainees’ audio-taped responses to a client stimulus which were assessed by “blind” raters. Observed empathy was measured by practicum supervisors based on their observations of trainees with clients. Emotional, cognitive, and relational empathy were assessed by trainees’ self-reported responses about …

A Portrait Of Assessment In Reformed Mathematics Classrooms, James R. Kett

Dissertations

During the past decade, the National Council of Teachers of Mathematics published three documents (1989, 1991, 1995) which propose changes in content, instruction, and assessment. These documents call for instructional and assessment goals that support students as they construct their own meaning to mathematics. A next step is to develop assessment models consistent with these goals which would guide and support classroom teachers.

As a result of mathematics reform, many curriculum development projects are underway. One such project is the Core-Plus Mathematics Project (CPMP) . This research documents the assessment practices of four CPMP teachers working in 9th and 10th …

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.

Adolescent Depression In The Secondary School Setting: A Guide For Teachers?, Virginia Stauss

Theses and Dissertations

No abstract provided.

Flow And Congestion Control For Internet Streaming Applications, Shanwei Cen, Calton Pu, Jonathan Walpole

Computer Science Faculty Publications and Presentations

The emergence of streaming multimedia players provides users with low latency audio and video content over the Internet. Providing high-quality, best-effort, real-time multimedia content requires adaptive delivery schemes that fairly share the available network bandwidth with reliable data protocols such as TCP. This paper proposes a new flow and congestion control scheme, SCP (Streaming Control Protocol) , for real-time streaming of continuous multimedia data across the Internet. The design of SCP arose from several years of experience in building and using adaptive real-time streaming video players. SCP addresses two issues associated with real-time streaming. First, it uses a congestion control …