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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

The implementation of the graphical unitary group approach in multi-reference configuration interaction calculations with applications to H₂O and O₂ /

Brown, Franklin Bernard January 1982 (has links)
No description available.
152

A Study on the Functions of the E1B Minor Products of Adenovirus Type 5

Brown, Steven January 1990 (has links)
The E1b transforming region of Adenovirus type 5 encodes minor products of 93R and 156R in addition to the more abundant proteins 178R, 496R, and 84R. The goal of this study was to elucidate the function of 93R and 156R to gain a better understanding of their role in oncogenic transformation and productive infection. Mutant viruses were constructed, whose normal splicing pattern was disrupted by point mutations in the 3' acceptor sites for the 1.26 and 1.31Kb mRNAs, which code for the 156R and 93R products, respectively. In the construction of these mutations, it was necessary to ensure that they did not affect the coding region for 496R. These mutants produced transformed foci in primary rat kidney cells with wild type efficiencies in DNA-mediated transformation assays. In the mutant designed to eliminate 156R, although the two wild type 156R species were absent, two new species running slightly faster on SDS-PAGE were detected. These proteins were recognized by sera specific to both the N- and C-termini of 496R, suggesting there utilization of an in-frame cryptic splice acceptor site. Use of this site probably resulted in the production of a mRNA encoding a modified 156R. These mutant proteins also seemed to be produced at the expense of 496R. The mutant designed to eliminate 93R grew with titres equivalent to wild type dl309, yet it was not clear whether a modified protein was produced in this case as well. / Thesis / Master of Science (MS)
153

Role and Functions of School Psychologists in Virginia: a Ten Year Follow-Up

Lowry, Rebecca Stevenson 31 March 1998 (has links)
The role and functions of school psychologists and changes in such have been the subject of research by numerous authors both nationally and within the Commonwealth of Virginia. School psychologists have functioned as both direct and indirect service providers to school-aged children, with the former service delivery model, namely that of the diagnostician, taking precedence within the Commonwealth of Virginia. The profession has undergone and continues to undergo noted changes as a result of recent legislation and movements toward educational reform. The purpose of this study is to analyze the role of the school psychologist in the Commonwealth of Virginia, based on a survey of the role expectations of school psychologists. This information will then be compared with the role and function of school psychologists in previous years. The population of school psychologists in Virginia was chosen for the present study because of existing research using this population conducted by Murray in 1975 and by Lovern in 1987.</> Data were collected via mailed surveys using a personal data form to gain demographic information, and a modified form of the questionnaire used by Murray (1975) and Lovern (1987). Four hundred and four Virginia members of the National Association of School Psychologists were mailed survey materials. Three hundred and sixty-five surveys were returned and of this total, two hundred and eighty-two met the requirements to be used in the data analysis. This total yielded a final response rate of 78%. Results in terms of practitioner's preferred level of training indicated the specialist (Ed.S.) Level as being adequate. As for the preferred major field, a combination of education and psychology was indicated by most respondents. School Psychology was indicated as the preferred degree specialty with no preference noted for the Doctor of Education, Doctor of Philosophy, or Doctor of Psychology. Preferences for previous experience were mixed, with approximately the same number of respondents rating experience in both the classroom and other psychological and/or psychiatric settings as important. In terms of the perceived importance of various functions, school psychologists rated some of the more traditional direct and indirect services to children as most important. Examples included consultation with teachers, participation in eligibility committee meetings, parent conferences, and diagnostic studies. Those areas rated lower in terms of importance included group test administration, curriculum design, and research activities. As for the actual frequency with which these same functions were performed, practitioners rated diagnostic studies, eligibility committee participation, parent conferences, and consultation with teachers and administrators as being performed most frequently. In contrast, those functions performed less frequently included participation in IEP meetings and transition planning, staff training, curriculum design, prevention programs, and virtually all facets of research. When asked about participation in various professional activities, school psychologists rated membership in The Virginia Academy of School Psychologists (VASP) and The National Association of School Psychologists (NASP) as very important. Other professional activities which were perceived as important included the reading of current professional publications and maintaining professional relationships. Relationships between selected demographic variables and practitioner responses were evident to a limited degree. It was noted that significantly more males than females believed it was important for the school psychologist to conduct research to evaluate the appropriateness of prevention programs. Respondents with higher levels of training attributed greater importance on having a doctorate; school psychologists with fewer years experience believed it was important to conduct parent education classes; and finally, experience as a classroom teacher was seen as more important by those who had experience in the classroom. Comparisons across the three studies (1975, 1987, 1996) reveal similarities in terms of background experience, academic training, and membership in professional organizations. Generally, agreement was present regarding practitioner perceptions of the frequency of functions; yet to a somewhat lesser degree in terms of the perceived importance of various functions. Results of the present study indicated that "diagnostic studies" no longer lead in terms of practitioner importance ratings; "consultant to teachers" has now been ranked in first place. In contrast, "diagnostic studies" ranked first in terms of respondent's actual frequency of functions performed, a finding consistent with the two previous studies. Finally, agreement continues to exist in terms of practitioner rankings of those functions performed less frequently, both in terms of perceived importance and actual performance frequency. Examples include group testing, curriculum design, community service, and research. Several implications were drawn from the results of the present study leading to recommendations for school psychologists and trainers, employers of school psychologists, and professional school psychology organizations. The recommendations focused on training for school psychologists and topics for further research. / Ph. D.
154

Manning and Automation Model for Naval Ship Analysis and Optimization

Scofield, Tyson James 19 June 2006 (has links)
The manning of a ship is a major driver of life cycle cost. The U.S. Government Accounting Office (GAO) has determined that manpower is the single most influential component in the life cycle cost of a ship. Life cycle cost is largely determined by decisions made during concept design. Consequently, reliable manpower estimates need to be included early in the design process, preferably in concept design. The ship concept exploration process developed at Virginia Tech uses a Multi-Objective Genetic Optimization to search the design space for feasible and non-dominated ship concepts based on cost, risk and effectiveness. This requires assessment of thousands of designs without human intervention. The total ship design problem must be set up before actually running the optimization. If manning is to be included in this process, manning estimate tools must be run seamlessly as part of the overall ship synthesis and optimization. This thesis provides a method of implementing a manning task network analysis tool (ISMAT, Integrated Simulation Manning Analysis Tool, Micro Analysis and Design) in an overall ship synthesis program and design optimization. The inputs to the analysis are ship systems (propulsion, combat systems, communication, etc), maintenance strategy, and level of automation. The output of the manning model is the number of crew required to accomplish a given mission for a particular selection of systems, maintenance and automation. Task network analysis programs are ideal for this problem. They can manage the probabilistic nature of a military mission and equipment maintenance, and can be used to simplify the problem by breaking down the complex functions and tasks of a ship's crew. The program builds large and complex functions from small related tasks. This simplifies the calculation of personnel and time utilization, and allows a more flexible scheme for building complex mission scenarios. In this thesis, ISMAT is run in a pre-optimization step to build a response surface model (RSM) for calculating required manning as a function of systems, maintenance and automation. The RSM is added to the ship synthesis model to calculate required manning, and a concept exploration case study is performed for an Air Superiority Cruiser (CGX) using this model. The performance of the manning model in this case study is assessed and recommendations are made for future work. This research shows that there is a difference between minimum manning and optimal manning on US Navy Ships. / Master of Science
155

Double Functioning Elements

Syed, Hasan Nawaz 06 October 2006 (has links)
With the increase in the number of functions in the modern age, it has become quite a challenge for an architect to satisfy the requirements and still have an appropriate architectural expression for the materials and the underlying structure. Such challenges may be found both in nature and man made machines, giving rise to elements with multiple functions. This thesis attempts to explore such precedents offered in both architecture and other areas, and apply the ideas and principles in the design of a primary school. / Master of Architecture
156

Large-scale data analysis using the Wigner function

Earnshaw, Rae A., Lei, Ci,, Li, Jing, Mugassabi, Souad, Vourdas, Apostolos January 2012 (has links)
No / Large-scale data are analysed using the Wigner function. It is shown that the ‘frequency variable’ provides important information, which is lost with other techniques. The method is applied to ‘sentiment analysis’ in data from social networks and also to financial data.
157

A Temporal White Noise Analysis for Extracting the Impulse Response Function of the Human Electroretinogram

Zele, A., Feigle, B., Kambhampati, P., Aher, A., McKeefry, Declan J., Parry, Neil R.A., Maguire, John, Murray, I.J., Kremers, Jan January 2017 (has links)
Yes / Purpose: We introduce a method for determining the impulse response function (IRF) of the ERG derived from responses to temporal white noise (TWN) stimuli. Methods: This white noise ERG (wnERG) was recorded in participants with normal trichromatic vision to full-field (Ganzfeld) and 39.38 diameter focal stimuli at mesopic and photopic mean luminances and at different TWN contrasts. The IRF was obtained by cross-correlating the TWN stimulus with the wnERG. Results: We show that wnERG recordings are highly repeatable, with good signal-tonoise ratio, and do not lead to blink artifacts. The wnERG resembles a flash ERG waveform with an initial negativity (N1) followed by a positivity (P1), with amplitudes that are linearly related to stimulus contrast. These N1 and N1-P1 components showed commonalties in implicit times with the a- and b-waves of flash ERGs. There was a clear transition from rod- to cone-driven wnERGs at ~1 photopic cd.m 2. We infer that oscillatory potentials found with the flash ERG, but not the wnERG, may reflect retinal nonlinearities due to the compression of energy into a short time period during a stimulus flash. Conclusion: The wnERG provides a new approach to study the physiology of the retina using a stimulation method with adaptation and contrast conditions similar to natural scenes to allow for independent variation of stimulus strength and mean luminance, which is not possible with the conventional flash ERG. Translational Relevance: The white noise ERG methodology will be of benefit for clinical studies and animal models in the evaluation of hypotheses related to cellular redundancy to understand the effects of disease on specific visual pathways.
158

Mechanisms to identify synergies between compliance and operational risk functions

Mazula, Wandile January 2016 (has links)
Academic literature is limited on how to coordinate the compliance and operational risk functions in organisations. The functional overlap between these two functions in financial institutions, such as banks, may result in oversight gaps or unintentional duplication. This paper describes a study on the overlap between these two functions in the second line of risk and control defence. A number of documents were analysed including relevant Basel Committee documents; South African banking legislation and regulations; integrated annual results, risk and capital reports of the four largest South African (the Big Four) banks; as well as internal operational risk and compliance documents of one of the Big Four banks. Based on this study, regulatory and practice based guidelines are proposed, which may be used to improve the efficiency of the compliance and operational risk functions in banks.
159

Mechanisms to identify synergies between compliance and operational risk functions

Mazula, Wandile January 2016 (has links)
Academic literature is limited on how to coordinate the compliance and operational risk functions in organisations. The functional overlap between these two functions in financial institutions, such as banks, may result in oversight gaps or unintentional duplication. This paper describes a study on the overlap between these two functions in the second line of risk and control defence. A number of documents were analysed including relevant Basel Committee documents; South African banking legislation and regulations; integrated annual results, risk and capital reports of the four largest South African (the Big Four) banks; as well as internal operational risk and compliance documents of one of the Big Four banks. Based on this study, regulatory and practice based guidelines are proposed, which may be used to improve the efficiency of the compliance and operational risk functions in banks.
160

A TELEMETRY SYSTEM BASED ON GENERALIZED BRIDGE FUNCTION

Xuefang, Rao, Qishan, Zhang 10 1900 (has links)
International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The mathematics basis that can form a telemetry system is orthogonal functions. Three kinds of orthogonal functions are used up to now. First of them is sine and cosine function family. The second one is block pulse function family. The third one is Walsh function family. Their corresponding telemetry systems are FDM, TDM and SDM (CDM). Later we introduced an orthogonal function which is called Bridge function. The corresponding system is named telemetry system based on Bridge function. Now a new kind of orthogonal function, Generalized Bridge function, has been found. It can be applied to practical multiplex of information transmission. In this paper the author provides the design concept, block diagram, operational principle and technical realization of telemetry system based on Generalized Bridge function.

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