Dissertations / Theses on the topic 'Computer aided text analysis'
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Garrad, Mark, and n/a. "Computer Aided Text Analysis in Personnel Selection." Griffith University. School of Applied Psychology, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040408.093133.
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This program of research was aimed at investigating a novel application of computer aided text analysis (CATA). To date, CATA has been used in a wide variety of disciplines, including Psychology, but never in the area of personnel selection. Traditional personnel selection techniques have met with limited success in the prediction of costly training failures for some occupational groups such as pilot and air traffic controller. Accordingly, the overall purpose of this thesis was to assess the validity of linguistic style to select personnel. Several studies were used to examine the structure of language in a personnel selection setting; the relationship between linguistic style and the individual differences dimensions of ability, personality and vocational interests; the validity of linguistic style as a personnel selection tool and the differences in linguistic style across occupational groups. The participants for the studies contained in this thesis consisted of a group of 810 Royal Australian Air Force Pilot, Air Traffic Control and Air Defence Officer trainees. The results partially supported two of the eight hypotheses; the other six hypotheses were supported. The structure of the linguistic style measure was found to be different in this study compared with the structure found in previous research. Linguistic style was found to be unrelated to ability or vocational interests, although some overlap was found between linguistic style and the measure of personality. In terms of personnel selection validity, linguistic style was found to relate to the outcome of training for the occupations of Pilot, Air Traffic Control and Air Defence Officer. Linguistic style also demonstrated incremental validity beyond traditional ability and selection interview measures. The findings are discussed in light of the Five Factor Theory of Personality, and motivational theory and a modified spreading activation network model of semantic memory and knowledge. A general conclusion is drawn that the analysis of linguistic style is a promising new tool in the area of personnel selection.
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Garrad, Mark. "Computer Aided Text Analysis in Personnel Selection." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367424.
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This program of research was aimed at investigating a novel application of computer aided text analysis (CATA). To date, CATA has been used in a wide variety of disciplines, including Psychology, but never in the area of personnel selection. Traditional personnel selection techniques have met with limited success in the prediction of costly training failures for some occupational groups such as pilot and air traffic controller. Accordingly, the overall purpose of this thesis was to assess the validity of linguistic style to select personnel. Several studies were used to examine the structure of language in a personnel selection setting; the relationship between linguistic style and the individual differences dimensions of ability, personality and vocational interests; the validity of linguistic style as a personnel selection tool and the differences in linguistic style across occupational groups. The participants for the studies contained in this thesis consisted of a group of 810 Royal Australian Air Force Pilot, Air Traffic Control and Air Defence Officer trainees. The results partially supported two of the eight hypotheses; the other six hypotheses were supported. The structure of the linguistic style measure was found to be different in this study compared with the structure found in previous research. Linguistic style was found to be unrelated to ability or vocational interests, although some overlap was found between linguistic style and the measure of personality. In terms of personnel selection validity, linguistic style was found to relate to the outcome of training for the occupations of Pilot, Air Traffic Control and Air Defence Officer. Linguistic style also demonstrated incremental validity beyond traditional ability and selection interview measures. The findings are discussed in light of the Five Factor Theory of Personality, and motivational theory and a modified spreading activation network model of semantic memory and knowledge. A general conclusion is drawn that the analysis of linguistic style is a promising new tool in the area of personnel selection.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Applied Psychology (Health)
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Valeš, Miroslav. "Seeking the Pattern: Using Quantitative Text Analysis to Assess Text Influence on Grant Program Results." Master's thesis, Vysoká škola ekonomická v Praze, 2014. http://www.nusl.cz/ntk/nusl-193924.
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Since software and hardware is well available for automated text analysis and since a large data that describes real projects submitted to grant program is opened up, there is a possibility to follow phenomena of behavioral economics and psycholinguistics which evidence particularities in textual descriptions may be statistically associated with a reader's behavior or with a reader's decision-taking, which, in this case, involves an influence on final allocation of grant funds. The thesis uses forenamed areas as a starting-point and also employs quantitative indicators from the field of forensic linguistics in order to perform a computer-aided quantitative text analysis. The main goal is to evaluate from correlation perspective, if there in real operational programmes were present any associable relationships between the quantitative features of a proposed project's textual description and the amount of grant allocated to a project. The thesis is divided into four chapters, where it introduces basis, describes analyzed data and used methods, comments on made analyses and found relations, and all the performed research is summarized and evaluated in the last chapter.
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Bakharia, Aneesha. "Interactive content analysis : evaluating interactive variants of non-negative Matrix Factorisation and Latent Dirichlet Allocation as qualitative content analysis aids." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/76535/1/Aneesha_Bakharia_Thesis.pdf.
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This thesis addressed issues that have prevented qualitative researchers from using thematic discovery algorithms. The central hypothesis evaluated whether allowing qualitative researchers to interact with thematic discovery algorithms and incorporate domain knowledge improved their ability to address research questions and trust the derived themes. Non-negative Matrix Factorisation and Latent Dirichlet Allocation find latent themes within document collections but these algorithms are rarely used, because qualitative researchers do not trust and cannot interact with the themes that are automatically generated. The research determined the types of interactivity that qualitative researchers require and then evaluated interactive algorithms that matched these requirements. Theoretical contributions included the articulation of design guidelines for interactive thematic discovery algorithms, the development of an Evaluation Model and a Conceptual Framework for Interactive Content Analysis.
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Daoust, François. "Modélisation informatique de structures dynamiques de segments textuels pour l'analyse de corpus." Phd thesis, Université de Franche-Comté, 2011. http://tel.archives-ouvertes.fr/tel-00870410.
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L'objectif de la thèse est de proposer un modèle informatique pour représenter, construire et exploiterdes structures textuelles. Le modèle proposé s'appuie sur une représentation du texte sous la forme d'unplan lexique/occurrences augmenté de systèmes d'annotations lexicales et contextuelles, modèle dontune implantation a été réalisée dans le logiciel SATO dont on présente les fonctionnalités etl'organisation interne. La présentation d'un certain nombre de travaux rendent compte dudéveloppement et de l'utilisation du logiciel dans divers contextes.La prise en charge formelle des structures textuelles et discursives trouve un allié dans le langage debalisage XML et dans les propositions de la Text Encoding Initiative (TEI). Formellement, lesstructures construites sur les segments textuels correspondent à des graphes. Dans le contexte d'uneanalyse textuelle en élaboration, ces graphes sont multiples et partiellement déployés. La résolution deces graphes, au sens du rattachement des noeuds à des segments textuels ou à des noeuds d'autresgraphes, est un processus dynamique qui peut être soutenu par divers mécanismes informatiques. Desexemples tirés de la linguistique textuelle servent à illustrer les principes de l'annotation structurelle.Des considérations prospectives sur une implantation informatique d'un système de gestion del'annotation structurelle sont aussi exposées.
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Hosoya, Masao. "Computer aided newspaper content analysis." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28055.
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This thesis explores issues concerning computer aided content analysis for newspaper articles. Articles relevant to the Japan Air Self Defense Force's new fighter support jet (code named FSX) were collected from three newspapers in the U.S. and Japan. These data were downloaded and stored in a PC then analyzed using word processing software. At the same time, three articles were selected and distributed, along with relevant survey questions, to over 150 people. The survey was intended to examine the readers' responses to those articles. The results from the questionnaire and computer aided content analysis were analyzed, summarized and compared. These complementary studies were conducted to help determine whether computer aided content analysis could identify the information and impressions conveyed by these newspaper articles. The results of this complementary effort indicate that additional work is needed, particularly in software development, to make computer aided content analysis more useful. However, the results also showed the complexities of conveying and interpreting information. Content Analysis, U.S./Japan relationship, FSX
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Purdie, Cameron L. "Computer aided visual impact analysis." Thesis, University of Strathclyde, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385519.
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Schnackenberg, Andrew K. "Symbolizing Institutional Change: Media Representations and Legality in the Payday Loan and Medical Marijuana Industries." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1405090956.
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Otieno, Andrew Michael Wasonga. "Computer-aided analysis of metal machining." Thesis, University of Leeds, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251490.
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Ali, Abdulamer T. "Computer vision aided road traffic analysis." Thesis, University of Bristol, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333953.
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Rosen, Jacob (Jacob Benjamin). "Computer aided tax avoidance policy analysis." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98541.
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Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2015.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Title as it appears in MIT Commencement Exercises program, June 5, 2015: Computer aided tax evasion policy analysis: partnership calculation. Includes bibliographical references (pages 81-83).
his thesis presents a three part methodology for analyzing the ow of taxable income in large partnership structures. The method forms the basis for prototypical software which would clarify many complicated basis adjustment issues associated with partnership taxation. Partnerships, the most common form of "flow-through" tax entities, have rapidly increased in size, complexity and economic relevance between 2005 to 2015, as well as resulting in an estimated $91 billion in underreported income. Many of these partnerships have upwards of one million direct and indirect partners, as well as 100 tiers of additional large partnerships. This surge in the number of partnerships, combined with the highly complicated nature of US partnership taxation law, requires novel techniques to evaluate the tax consequences of increasingly complex financial activity. A computational methodology is presented in this thesis for understanding and analyzing the allocation of taxable income in large partnership structures, with particular focus on characterizing abusive tax behavior. First, a formal notation is established to fully describe how taxable income is allocated in partnerships, forming the basis of a functioning partnership tax calculator. Next, a simulation is described that processes transaction sequences through partnership structures, as well as a method for assigning audit likelihood to potentially suspicious combinations of financial activity. Finally, a means by which to optimize a) transaction sequences that minimize both tax liability and audit likelihood and b) auditing procedures that characterize abusive tax behavior in a compact form is established. The proposed methodology offers taxpayers, auditors and policy-makers a computational approach to resolve uncertainty in partnership taxation, lower the cost of the auditing process through automation and provide a conceptual exploration of tax policy implications.
by Jacob Rosen.
S.M. in Technology and Policy
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Coxon, Andrew. "Computer aided analysis of paraspinal electromyography." Thesis, Teesside University, 2013. http://hdl.handle.net/10149/301616.
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Back pain is responsible for British employees taking 5 million sick days per year. Low back pain (LBP) has a controversial aetiology, with 95% of cases caused by mechanical, non-pathological causes. Current medical treatment for mechanical LBP is an exercise regime designed to restore lumbar stability. Unfortunately this is often a painful process, and therefore difficult to complete. Electromyography (EMG) variables have been shown to be able to discriminate between subjects with and without mechanical LBP. If these variables could be shown to have discriminatory abilities before the actual onset of LBP they could be used to predict future episodes of LBP in currently otherwise asymptomatic individuals and allow the rehabilitation process to begin before the onset of symptoms. However a number of problems persist with EMG measurement. The test must be administered under closely controlled conditions in order to record clean signals, and interpretation of this data requires special tools and training. This thesis aims to make contributions in three main areas; Automated Analysis: Manual analysis of a large store of EMG raw data files is a time consuming process. If outcome variables that require manual interpretation are included this effect is magnified, with necessary questions being raised as to the accuracy and consistency levels that can be maintained. A successfully implemented automated system would reduce analysis time and improve confidence in the outcome variables recorded. Investigations will also be carried out into the addition of error detection and correction algorithms that could be performed during the analysis procedure. ECG Contamination Removal: Previous studies have identified ECG as a potential source of contamination of lumbar EMG signals. Compensation for this effect is non-trivial as the ECG frequencies overlap an area of interest in the EMG spectrum, and the ECG signal characteristics would change over a fatiguing EMG test. The Independent Component Analysis method will be used to attempt to extract and remove the ECG component of a recorded signal whilst preserving the underlying EMG data. If this is successful an analysis of the effect that removing ECG contamination has on EMG outcome variables will be presented. Colour Map Diagnostic Method: Colour maps are an excellent method of presenting a large amount of signal data to a researcher, and have been used to discriminate between LBP and non-LBP subjects. The usefulness of this diagnostic display too has been somewhat limited however by the difficulty in producing such maps. Investigations will be carried out into methods that will be able to quickly and accurately produce these colour maps to the same specification as earlier studies. Colour maps of subjects that did not report LBP at the time of testing, but who then did report LBP at their next presentation, will be examined to assess whether or not EMG colour maps can be used as a predictor for low back pain.
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Sertel, Olcay. "Image Analysis for Computer-aided Histopathology." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276791696.
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ARANHA, CHRISTIAN NUNES. "AN AUTOMATIC PREPROCESSING FOR TEXT MINING IN PORTUGUESE: A COMPUTER-AIDED APPROACH." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=10081@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOO presente trabalho apresenta uma pesquisa onde é proposto um novo modelo de pré-processamento para mineração de textos em português utilizando técnicas de inteligência computacional baseadas em conceitos existentes, como redes neurais, sistemas dinâmicos, e estatística multidimensional. O objetivo dessa tese de doutorado é, portanto, inovar na fase de pré- processamento da mineração de textos, propondo um modelo automático de enriquecimento de dados textuais. Essa abordagem se apresenta como uma extensão do tradicional modelo de conjunto de palavras (bag-of-words), de preocupação mais estatística, e propõe um modelo do tipo conjunto de lexemas (bag-of-lexems) com maior aproveitamento do conteúdo lingüístico do texto em uma abordagem mais computacional, proporcionando resultados mais eficientes. O trabalho é complementado com o desenvolvimento e implementação de um sistema de préprocessamento de textos, que torna automática essa fase do processo de mineração de textos ora proposto. Apesar do objeto principal desta tese ser a etapa de préprocessamento, passaremos, de forma não muito aprofundada, por todas as etapas do processo de mineração de textos com o intuito de fornecer a teoria base completa para o entendimento do processo como um todo. Além de apresentar a teoria de cada etapa, individualmente, é executado um processamento completo (com coleta de dados, indexação, pré-processamento, mineração e pósprocessamento) utilizando nas outras etapas modelos já consagrados na literatura que tiveram sua implementação realizada durante esse trabalho. Ao final são mostradas funcionalidades e algumas aplicações como: classificação de documentos, extração de informações e interface de linguagem natural (ILN).
This work presents a research that proposes a new model of pre-processing for text mining in portuguese using computational intelligence techniques based on existing concepts, such as neural networks, dinamic systems and multidimensional statistics. The object of this doctoral thesis is, therefore, innovation in the pre-processing phase of text-mining, proposing an automatic model for the enrichment of textual data. This approach is presented as an extension of the traditional bag-of-words model, that has a more statistical emphasis, and proposes a bag-of-lexemes model with greater usage of the texts' linguistic content in a more computational approach, providing more efficient results. The work is complemented by the development and implementation of a text pre-processing system that automates this phase of th text mining process as proposed. Despite the object of this thesis being the pre- processing stage, one feels apropriate to describe, in overview, every step of the text mining process in order to provide the basic theory necessary to understand the process as a whole. Beyond presenting the theory of every stage individually, one executes a complete process (with data collection, indexing, pre-processing, mining and postprocessing) using tried-and-true models in all the other stages, which were implemented during the development of this work. At last some functionalities and aplications are shown, such as: document classification, information extraction and natural language interface (NLI).
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Johnson, Tomas. "On some computer-aided proofs in analysis." Licentiate thesis, Uppsala universitet, Analys och tillämpad matematik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-141509.
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Ali, Amer F. "Computer aided analysis of the casting process." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1174931475.
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Smyth, Kieran John. "Computer aided analysis for linear repetitive processes." Thesis, University of Strathclyde, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385768.
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Griffin, Timothy R. "Computer-Aided Design Software for Torsional Analysis." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36548.
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The goal of this research has been the development of an effective design tool for torsional analysis. In the hopes of achieving this goal the computer program, Torsion 1, has been created. This torsional transfer matrix program provides the user with the ability to easily model multi-rotor systems using a simple user-interface. The program is capable of modeling such components or system characteristics as continuously distributed mass, viscous and structural damping, vibration absorbers, and gear meshes with gear tooth flexibility. The analysis capabilities of the program include forcedresponse and free-vibration analyses. The forced-response analysis module is capable of determining a system’s response to a static or harmonic torsional load. The free-vibration analysis module allows is capable of determining the eigenvalues and eigenvectors for damped and undamped systems. This thesis includes an explanation of the multi-rotor transfer matrix technique employed in Torsion 1. The derivation of transfer matrices for visco-elastic vibration absorbers, pendulum absorbers, flexible gear meshes, and planetary gear trains are included in this work. Finally, the validity of the program results is verified with a set of benchmark examples.Master of Science
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Servaites, Joseph Charles. "Computer Aided Analysis of Smoke Stack Designs." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/36757.
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The purpose of this research is to analyze the statics and dynamics of steel smoke stacks subject to excitation by aerodynamic forces. The wind loads experienced by smoke stacks arise from various phenomenon, the most prominent of which are static drag load, vortex shedding, and atmospheric turbulence. The nature of these loading sources around a cylinder are studied in detail. Both static and dynamic loads are capable of producing large tip deflections, and are of the most prominent design criteria for stack designers. A computer program, STACK1, has been created by modifying an existing analysis code, BEAM8, to be used specifically for stack analysis. This analysis code utilizes the transfer matrix method to perform detailed bending and vibration analyses. This new software has been developed to check stack designs for compliance with appropriate steel stack standards, and provide the designer with information regarding the static and dynamic response of the structure. A detailed analysis is performed to demonstrate the validity of approximating a tapered Timoshenko beam with a series of continuous, constant cross-section beams.Master of Science
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Ford, Ralph M. (Ralph Michael) 1965. "Computer-aided analysis of medical infrared images." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276986.
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Thermography is a useful tool for analyzing spinal nerve root irritation, but interpretation of digital infrared images is often qualitative and subjective. A new quantitative, computer-aided method for analyzing thermograms, utilizing the human dermatome map, is presented. Image processing and pattern recognition principles needed to accomplish this goal are discussed. Algorithms for segmentation, boundary detection and interpretation of thermograms are presented. An interactive, user-friendly program to perform this analysis has been developed. Due to the relatively large number of images in an exam, speed and simplicity were emphasized in algorithm development. The results obtained correlate well with clinical data and show promise for aiding the diagnosis of spinal nerve root irritation.
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Buys, Stephanus. "Log analysis aided by latent semantic mapping." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1002963.
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In an age of zero-day exploits and increased on-line attacks on computing infrastructure, operational security practitioners are becoming increasingly aware of the value of the information captured in log events. Analysis of these events is critical during incident response, forensic investigations related to network breaches, hacking attacks and data leaks. Such analysis has led to the discipline of Security Event Analysis, also known as Log Analysis. There are several challenges when dealing with events, foremost being the increased volumes at which events are often generated and stored. Furthermore, events are often captured as unstructured data, with very little consistency in the formats or contents of the events. In this environment, security analysts and implementers of Log Management (LM) or Security Information and Event Management (SIEM) systems face the daunting task of identifying, classifying and disambiguating massive volumes of events in order for security analysis and automation to proceed. Latent Semantic Mapping (LSM) is a proven paradigm shown to be an effective method of, among other things, enabling word clustering, document clustering, topic clustering and semantic inference. This research is an investigation into the practical application of LSM in the discipline of Security Event Analysis, showing the value of using LSM to assist practitioners in identifying types of events, classifying events as belonging to certain sources or technologies and disambiguating different events from each other. The culmination of this research presents adaptations to traditional natural language processing techniques that resulted in improved efficacy of LSM when dealing with Security Event Analysis. This research provides strong evidence supporting the wider adoption and use of LSM, as well as further investigation into Security Event Analysis assisted by LSM and other natural language or computer-learning processing techniques.LaTeX with hyperref package
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Drozdzal, Michal. "Sequential image analysis for computer-aided wireless endoscopy." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/145614.
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Wireless Capsule Endoscopy (WCE) is a technique for inner-visualization of the entire small intestine and, thus, offers an interesting perspective on intestinal motility. The two major drawbacks of this technique are: 1) huge amount of data acquired by WCE makes the motility analysis tedious and 2) since the capsule is the first tool that offers complete inner-visualization of the small intestine, the exact importance of the observed events is still an open issue. Therefore, in this thesis, a novel computer-aided system for intestinal motility analysis is presented. The goal of the system is to provide an easily-comprehensible visual description of motility-related intestinal events to a physician. In order to do it, several tools based either on computer vision concepts or on machine learning techniques are presented.
A method for transforming 3D video signal to a holistic image of intestinal motility, called motility bar, is proposed. The method calculates the optimal mapping from video into image from the intestinal motility point of view.
To characterize intestinal motility, methods for automatic extraction of motility information from WCE are presented. Two of them are based on the motility bar and two of them are based on frame-per-frame analysis. In particular, four algorithms dealing with the problems of intestinal contraction detection, lumen size estimation, intestinal content characterization and wrinkle frame detection are proposed and validated.
The results of the algorithms are converted into sequential features using an online statistical test. This test is designed to work with multivariate data streams. To this end, we propose a novel formulation of concentration inequality that is introduced into a robust adaptive windowing algorithm for multivariate data streams. The algorithm is used to obtain robust representation of segments with constant intestinal motility activity. The obtained sequential features are shown to be discriminative in the problem of abnormal motility characterization.
Finally, we tackle the problem of efficient labeling. To this end, we incorporate active learning concepts to the problems present in WCE data and propose two approaches. The first one is based the concepts of sequential learning and the second one adapts the partition-based active learning to an error-free labeling scheme. All these steps are sufficient to provide an extensive visual description of intestinal motility that can be used by an expert as decision support system.
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Heng, Fock Lee. "Computer-aided analysis and design for extrusion dies." Thesis, University of Ottawa (Canada), 1987. http://hdl.handle.net/10393/5444.
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Militano, Giovanni. "Computer-aided free vibration analysis of guyed towers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0020/MQ53192.pdf.
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Grashion, Anton R. "Computer aided analysis of ancient fluvial depositional environments." Thesis, Staffordshire University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241509.
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Bordeaux, John C. "An Interactive Computer Aided Design and Analysis Package." Thesis, Monterey, California. Naval Postgraduate School, 1986. http://hdl.handle.net/10945/31784.
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In this thesis a NASA developed Markov reliability analysis tool will be ported to a relatively inexpensive IBM-AT enironment. Currently the Markov analysis took, called SURE, is not widely utilized because it runs in an expensive environment consisting of a VAX, megatex display, and template graphics software. Although substantial savings can be madeby running SURE without the expensive grpahics, the user friendliness of the tool dramatically degrated by the lack of graphics. Accordingly a C program using the inexpensive GEM graphics environment has been written. The program is user friendlyit uses menus for option selections and prompts for data entry.
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Wilhelm, Joseph Arthur Jr. "Computer Aided Thermal Analysis of a Microcircuit Structure." Thesis, Monterey, California. Naval Postgraduate School, 1990. http://hdl.handle.net/10945/37520.
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Approved for public release, distribution is unlimited.The Naval Post Graduate School has obtained software which can be used for the thermal analysis of an electronic component. This software includes two versions, one for steady state analysis and the other for transient analysis. Each version consists of two programs, a model builder and a thermal analyzer. This thesis describes a user friendly, menu driven specific model builder which may be used to rapidly generate a thermal model, containing up to 750 nodes, for a microcircuit die. This model builder is an improvement over the existing model builder in that the only pertinent input will be the physical dimensions and heat transfer data. The main feature of this model builder is the accommodation of the marked variation of silicon thermal conductivity with temperature.
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Wolovitz, Lionel Berel. "Computer aided analysis of periodically switched linear networks." Thesis, University of Glasgow, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305606.
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Chutima, Surachate. "Computer aided analysis of mechanically fastened composite laminates." Thesis, University College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244053.
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Verity, Adrian. "A computer aided music therapy analysis system : CAMTAS." Thesis, University of York, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425732.
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Bagshaw, Paul Christopher. "Automatic prosodic analysis for computer aided pronunciation teaching." Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/10694.
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Correct pronunciation of spoken language requires the appropriate modulation of acoustic characteristics of speech to convey linguistic information at a suprasegmental level. Such prosodic modulation is a key aspect of spoken language and is an important component of foreign language learning, for purposes of both comprehension and intelligibility. Computer aided pronunciation teaching involves automatic analysis of the speech of a non-native talker in order to provide a diagnosis of the learner's performance in comparison with the speech of a native talker. This thesis describes research undertaken to automatically analyse the prosodic aspects of speech for computer aided pronunciation teaching. It is necessary to describe the suprasegmental composition of a learner's speech in order to characterise significant deviations from a native-like prosody, and to offer some kind of corrective diagnosis. Phonological theories of prosody aim to describe the suprasegmental composition of speech for a specific language. It is argued here that the suprasegmental composition of the speech of a non-native talker can be highly influenced by mother-tongue interference thereby rendering a language-specific phonological representation of prosody inappropriate. Moreover, languages vary in the way acoustic characteristics of speech are modified to manifest prosodic aspects of speech and the only secure means available to describe prosody for foreign language teaching therefore lies at an acoustic-phonetic representation. The automatic prosodic analysis of speech presented in this thesis aims to provide such an acoustic-phonetic representation. The prosodic aspects of speech are described in a syllabic domain which is synchronised with a phonetic segmentation. An algorithm is presented which groups acoustic-phonetic segments into syllabic units.
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Bridge, Christopher. "Computer-aided analysis of fetal cardiac ultrasound videos." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:c9cad151-6f08-461a-acd6-9fd63477b91a.
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This thesis addresses the task of developing automatic algorithms for analysing the two-dimensional ultrasound video footage obtained from fetal heart screening scans. These scans are typically performed in the second trimester of pregnancy to check for congenital heart anomalies and require significant training and anatomical knowledge to perform. The aim is to develop a tool that runs at high frame rates with no user initialisation and infers the visibility, position, orientation, view classification, and cardiac phase of the heart, and additionally the locations of cardiac structures of interest (such as valves and vessels) in a manner that is robust to the various sources of variation that occur in real-world ultrasound scanning. This is the first work to attempt such a detailed automated analysis of these videos. The problem is posed as a Bayesian filtering problem, which provides a principled framework for aggregating uncertain measurements across a number of frames whilst exploiting the constraints imposed by anatomical feasibility. The resulting inference problem is solved approximately with a particle filter, whose state space is partitioned to reduce the problems associated with filtering in high-dimensional spaces. Rotation-invariant features are captured from the videos in an efficient way in order to tackle the problem of unknown orientation. These are used within random forest learning models, including a novel formulation to predict circular-valued variables. The algorithm is validated on an annotated clinical dataset, and the results are compared to estimates of inter- and intra-observer variation, which are significant in both cases due to the inherent ambiguity in the imagery. The results suggest that the algorithm's output approaches these benchmarks in several respects, and fall slightly behind in others. The work presented here is an important first step towards developing automated clinical tools for the detection of congenital heart disease.
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Bau-Hsing, Ann. "Computer-aided electromagnetic analysis of chokes and transformers." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1438255468.
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Tu, Chihyung. "Computer-aided design software for rotor dynamics analysis." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07102009-040616/.
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Kang, Yuezhuang. "Computer-aided fixture design verification." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0108102-163543.
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Thesis (M.S.)--Worcester Polytechnic Institute.Keywords: Fixture stiffness matrix; Jacobian matrix; kinetic model; geometric model; fixture design verification; stability analysis; tolerance analysis; tolerance assignment. Includes bibliographical references (p. 92-97).
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Zheng, Yi. "Finite Element Analysis for Fixture Stiffness." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-050505-130954/.
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Kandaz, Murat. "Computer Aided Design And Structural Analysis Of Pressure Vessels." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607261/index.pdf.
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This study is conducted for the design and analysis of pressure vessels and associated pressurized equipment using various codes and methods. A computer software is developed as the main outcome of this study, which provides a quick and comprehensive analysis by using various methods utilized in codes and standards together with theoretical and empirical methods which are widely accepted throughout the world.
Pressure vessels are analyzed using ASME Boiler and Pressure Vessel Code, whereas auxiliary codes, especially ASCE and AISC codes are utilized for structural analyses of these equipment. Effect of wind, seismic, and other types of loadings are also taken into consideration in detail, with dynamic analyses. Support structures and their auxiliary components are also items of analysis.
Apart from pressure vessels, many pressurized process equipments that are commonly used in the industy are also included in the scope of the study. They include safety valves which are an integral part of those kinds of pressurized or enclosed systems, two of the heat exchanger components with great importance -tubesheets and expansion joints-, and API 650 tanks for oil or water storage.
The computer software called as VESSELAID is written in Microsoft Visual Basic 6.0 using SI units. Design and analysis methods of VESSELAID are based on various code rules, recommended design practices and alternative approaches.
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Banerji, Kingshuk. "Quantitative analysis of fracture surfaces using computer aided fractography." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/15381.
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Slaboszewicz, Jacek K. (Jacek Kazimierz). "Computer-aided analysis and design of acoustic wave devices." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=68053.
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This thesis focuses on the design of two software packages to support the study of acoustic waves and acoustic wave grating devices. The first package deals with fundamental properties of acoustic waves. The bulk acoustic wave program calculates bulk acoustic wave (BAW) propagation properties in materials of arbitrary anisotropy and piezoelectricity. The surface acoustic wave program calculates surface acoustic wave (SAW) and plate-mode propagation properties in multilayers of arbitrary anisotropy and piezoelectricity. These two programs provide the basis for the study of specific bulk-wave and surface-wave devices and structures. The second package deals with SAW grating geometries consisting of gratings, transducers, delays, acoustic and electrical coupling elements, and matching networks. The software simulates any arbitrary structure that can be derived from built-in acoustic and electrical building blocks. Software design is flexible and other building blocks can easily be added. Synthesis of very narrow, lossy, multipole, bandpass filters is included.The acoustic wave models are based on matrix formulations. The BAW model expresses bulk-wave propagation as a third-order eigenvalue problem. The SAW model represents each layer with a transfer matrix describing the mechanical and electrical field variables. Boundary conditions between layers are automatically satisfied when these transfer matrices are chain-multiplied, yielding in the general case, a first-order, eight-dimensional differential equation. Similarly, the grating device model uses the cascaded transmission matrix description (distributed model), where overall transfer characteristics are computed by chain-multiplying building block matrices. This distributed model provides accurate in-band and out-of-band responses. The filter synthesis uses a lumped element model approximation of one-pole two-port resonator building blocks as a first approximation. The synthesis design is then verified with the accurate distributed model. Accuracy and sensitivity is examined for both the lumped and distributed models and compared with experimental results.
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Ashton, Andrew R. "Computer aided analysis and design of mine transportation systems." Thesis, University of Nottingham, 1989. http://eprints.nottingham.ac.uk/13263/.
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Haulage Costs account for a considerable portion of a surface mine's operational budget. It is therefore vital that, for a particular pit configuration, the optimum utilisation of the available truck fleet is adopted during the mine's life. Also, if the optimisation methods are established beforehand, it is possible to determine exactly how many trucks will be required. Both decisions can be made at the planning stage by the application of linear programming and discrete simulation to computer models of the haulage network. The project presented herein investigates the practicality of developing a general-purpose mine transportation selection and scheduling system within the context of a Computer Aided Design (CAD) environment. Compatibility with a purpose-built, interactive graphics package is shown to enable rapid, semiautomatic generation of model networks and the planning engineer is assisted further by the robust and friendly user-interface which has also been developed. Unlike a number of existing packages, which either make use of commercially available software on a stand-alone basis or were specifically designed for the analysis of a particular operation, this system is completely integrated with a central database which makes it applicable to any mine. The enhanced ability to produce valid mathematical solutions and their associated network models using the above systems, allows a large number of configurations and dispatching policies to be compared in a relatively short space of time. However, attention is also paid to the degree of correspondence with what can be achieved in reality since this will also effect the selection decision. All the modules mentioned form part of a much larger planning system currently being developed at The University of Nottingham, Department of Mining Engineering, known as NUmine.
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Clark, Brian John. "Computer-aided studies on luminescence spectroscopy in pharmaceutical analysis." Thesis, Heriot-Watt University, 1985. http://hdl.handle.net/10399/1658.
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Yang, James Ji. "Computer-aided design and analysis of series resonant converters." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80127.
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A software program was developed to facilitate the design and analysis of a series resonant converter. Using the program, the values of the inductor and capacitor of the resonant tank can be easily determined to meet design specifications. Following the design, a dc analysis is performed to determine such salient parameters as peak inductor current and peak capacitor voltage. The program is user-friendly with graphic capabilities and is written for the IBM-PC.Master of Science
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Shah, Rajandra. "Computer aided design and analysis of cold formed sections." Thesis, Aston University, 1987. http://publications.aston.ac.uk/11892/.
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The work reported in this thesis is concerned with the improvement and expansion of the assistance given to the designer by the computer in the design of cold formed sections. The main contributions have been in four areas, which have consequently led to the fifth, the development of a methodology to optimise designs. This methodology can be considered an `Expert Design System' for cold formed sections. A different method of determining section properties of profiles was introduced, using the properties of line and circular elements. Graphics were introduced to show the outline of the profile on screen. The analysis of beam loading has been expanded to beam loading conditions where the number of supports, point loads, and uniform distributive loads can be specified by the designer. The profile can then be checked for suitability for the specified type of loading. Artificial Intelligence concepts have been introduced to give the designer decision support from the computer, in combination with the computer aided design facilities. The more complex decision support was adopted through the use of production rules. All the support was based on the British standards. A method has been introduced, by which the appropriate use of stiffeners can be determined and consequently designed by the designer. Finally, the methodology by which the designer is given assistance from the computer, without constraining the designer, was developed. This methodology gives advice to the designer on possible methods of improving the design, but allows the designer to reject that option, and analyse the profile accordingly. The methodology enables optimisation to be achieved by the designer, designing variety of profiles for a particular loading, and determining which one is best suited.
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Onwubolu, Godfrey C. "Linking finite-element analysis and computer-aided drafting processes." Thesis, Aston University, 1985. http://publications.aston.ac.uk/11875/.
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The aim of this research was to investigate the integration of computer-aided drafting and finite-element analysis in a linked computer-aided design procedure and to develop the necessary software. The Be'zier surface patch for surface representation was used to bridge the gap between the rather separate fields of drafting and finite-element analysis because the surfaces are defined by analytical functions which allow systematic and controlled variation of the shape and provide continuous derivatives up to any required degree. The objectives of this research were achieved by establishing : (i) A package which interpretes the engineering drawings of plate and shell structures and prepares the Be'zier net necessary for surface representation. (ii) A general purpose stand-alone meshed-surface modelling package for surface representation of plates and shells using the Be'zier surface patch technique. (iii) A translator which adapts the geometric description of plate and shell structures as given by the meshed-surface modeller to the form needed by the finite-element analysis package. The translator was extended to suit fan impellers by taking advantage of their sectorial symmetry. The linking processes were carried out for simple test structures, simplified and actual fan impellers to verify the flexibility and usefulness of the linking technique adopted. Finite-element results for thin plate and shell structures showed excellent agreement with those obtained by other investigators while results for the simplified and actual fan impellers also showed good agreement with those obtained in an earlier investigation where finite-element analysis input data were manually prepared. Some extensions of this work have also been discussed.
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Buck, Robert John. "The design and analysis of computer experiments." Thesis, City University London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357556.
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Johansson, Christian. "Computer Forensic Text Analysis with Open Source Software." Thesis, Blekinge Tekniska Högskola, Institutionen för programvaruteknik och datavetenskap, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4994.
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Detta papper koncentrerar sig på kriminaltekniska undersökningar av text, med fokus på användande av mjukvara med öppen källkod. Pappret diskuterar och undersöker olika tekniker för framtida automatisering av dessa undersökningar.
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An, Hong. "Computer-aided applications in process plant safety." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6418.
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Process plants that produce chemical products through pre-designed processes are fundamental in the Chemical Engineering industry. The safety of hazardous processing plants is of paramount importance as an accident could cause major damage to property and/or injury to people. HAZID is a computer system that helps designers and operators of process plants to identify potential design and operation problems given a process plant design. However, there are issues that need to be addressed before such a system will be accepted for common use. This research project considers how to improve the usability and acceptability of such a system by developing tools to test the developed models in order for the users to gain confidence in HAZID s output as HAZID is a model based system with a library of equipment models. The research also investigates the development of computer-aided safety applications and how they can be integrated together to extend HAZID to support different kinds of safety-related reasoning tasks. Three computer-aided tools and one reasoning system have been developed from this project. The first is called Model Test Bed, which is to test the correctness of models that have been built. The second is called Safe Isolation Tool, which is to define isolation boundary and identify potential hazards for isolation work. The third is an Instrument Checker, which lists all the instruments and their connections with process items in a process plant for the engineers to consider whether the instrument and its loop provide safeguards to the equipment during the hazard identification procedure. The fourth is a cause-effect analysis system that can automatically generate cause-effect tables for the control engineers to consider the safety design of the control of a plant as the table shows process events and corresponding process responses designed by the control engineer. The thesis provides a full description of the above four tools and how they are integrated into the HAZID system to perform control safety analysis and hazard identification in process plants.
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Al-Jubouri, Adnan J. R. "Computer-aided categorisation and quantification of connectives in English and Arabic (based on newspaper text corpora)." Thesis, Aston University, 1987. http://publications.aston.ac.uk/10283/.
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This study presents a detailed contrastive description of the textual functioning of connectives in English and Arabic. Particular emphasis is placed on the organisational force of connectives and their role in sustaining cohesion. The description is intended as a contribution for a better understanding of the variations in the dominant tendencies for text organisation in each language. The findings are expected to be utilised for pedagogical purposes, particularly in improving EFL teaching of writing at the undergraduate level. The study is based on an empirical investigation of the phenomenon of connectivity and, for optimal efficiency, employs computer-aided procedures, particularly those adopted in corpus linguistics, for investigatory purposes. One important methodological requirement is the establishment of two comparable and statistically adequate corpora, also the design of software and the use of existing packages and to achieve the basic analysis. Each corpus comprises ca 250,000 words of newspaper material sampled in accordance to a specific set of criteria and assembled in machine readable form prior to the computer-assisted analysis. A suite of programmes have been written in SPITBOL to accomplish a variety of analytical tasks, and in particular to perform a battery of measurements intended to quantify the textual functioning of connectives in each corpus. Concordances and some word lists are produced by using OCP. Results of these researches confirm the existence of fundamental differences in text organisation in Arabic in comparison to English. This manifests itself in the way textual operations of grouping and sequencing are performed and in the intensity of the textual role of connectives in imposing linearity and continuity and in maintaining overall stability. Furthermore, computation of connective functionality and range of operationality has identified fundamental differences in the way favourable choices for text organisation are made and implemented.
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Ladner, Amy Lynn. "FREE-FORM DEFORMATION FOR COMPUTER-AIDED ENGINEERING ANALYSIS AND DESIGN." MSSTATE, 2007. http://sun.library.msstate.edu/ETD-db/theses/available/etd-07022007-131403/.
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Toward support of the use of geometry in advanced simulation, a free-form deformation (FFD) tool was designed, developed, and tested using object oriented (OO) techniques. The motivation for creating this FFD tool in-house was to provide engineers and researchers a cost efficient, quick, and easy way to computationally manipulate models without having to start from scratch while readily seeing the resulting geometry. The FFD tool was built using the OO scripting language, Python, the OO GUI toolkit, Qt, and the graphics toolkit, OpenGL. The tool produced robust and intuitive results for two-dimensional shapes especially when multiple point manipulation was utilized. The use of ?grouping? control points also provided the user the ability to maintain certain desired shape features such as straight lines and corners. This in-house FFD tool could be useful to engineers due to the ability to customize source code.
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Sun, Hui. "Computer aided design and analysis of loom beating-up mechanisms." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/9162.
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