Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Jacobs, Laurence; Committee Co-Chair: Qu, Jianmin; Committee Member: DesRoches, Reginald. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Michaels, Jennifer; Committee Member: Jacobs, Laurence; Committee Member: Michaels, Thomas. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Jacobs, Laurence J.; Committee Member: Kim, Jin-Yeon; Committee Member: Qu, Jianmin. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Thesis (PH. D.)--Michigan State University. Electrical Engineering, 2008. / Title from PDF t.p. (viewed on Sept. 8, 2009) Includes bibliographical references (p. 155-162). Also issued in print.

Thesis (Ph. D.)--University of Washington, 2006. / Vita. Includes bibliographical references (leaves 219-228).

Thesis (Ph. D.)--Oregon State University, 2011. / Printout. Includes bibliographical references (leaves 182-187). Also available on the World Wide Web.

Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008. / Durgin, Gregory, Committee Member ; Vachtsevanos, George, Committee Member ; Michaels, Thomas, Committee Member ; Michaels, Jennifer, Committee Chair ; Jacobs, Laurence, Committee Member.

Thesis (Ph. D.)--Washington State University, December 2007. / Includes bibliographical references (p. 138-148).

Στην παρούσα διπλωματική εργασία γίνεται εξομοίωση ενός κινητήρα τύπου ultrasonic με χρήση του προγράμματος simulink του matlab. Αρχικά αφού συγκεντρώθηκε όλη η απαραίτητη βιβλιογραφία σχετικά με τους Πιεζοηλεκτρικούς κινητήρες, γίνεται αναφορά στους προδρόμους του ultrasonic και μελετάται συγκεκριμένα ο πιεζοηλεκτρικός κινητήρας οδεύοντος κύματος τύπου ultrasonic (TWUM). Αναλύεται λεπτομερώς η δομή και η αρχή λειτουργίας του, καθώς και τα πλεονεκτήματα που παρουσιάζει. Η συμπεριφορά του, η λειτουργία του και οι εξισώσεις που τη διέπουν, αποτελούν το αντικείμενο της παραπάνω εξομοίωσης. Παρουσιάζονται λεπτομερώς τα αποτελέσματα της εξομοίωσης, τα οποία και πιστοποιούν το γεγονός ότι το μοντέλο που δημιουργήθηκε προσομοιώνει τη συμπεριφορά του κινητήρα σε μόνιμη και μεταβατική κατάσταση. Κατόπιν κατασκευάζεται πειραματική διάταξη όπου χρησιμοποιείται μία μηχανή συνεχούς ρεύματος ως φορτίο στον ultrasonic και λαμβάνονται μετρήσεις όταν το ηλεκτροκινητήριο σύστημα βρισκόταν σε μόνιμη και σε μεταβατική κατάσταση. Τέλος γίνεται σύγκριση των αποτελεσμάτων των παραπάνω μετρήσεων, αυτών που προέκυψαν από την εξομοίωση και των πειραματικών μετρήσεων. Διαπιστώνεται σύγκλιση μεταξύ τους, πράγμα που πιστοποιεί την επίτευξη του στόχου της παρούσας διπλωματικής εργασίας. / The aim of this thesis is the simulation of an ultrasonic motor using the simulink matlab program. Firstly, after selecting all the necessary bibliography on piezoelectric motors, reference was made to the precursors. The specific type of piezoelectric motor studied was a travelling wave ultrasonic motor one. A detailed analysis of the structure and the principle operation was undertaken. Moreover, this TWUM comes with a multitude of andvantages. Its behavior, its function and the equations that govern it were covered by the above simulation. Then, the results werw analyzed in detail.These testify to the fact that the model was createdto simulate the motor's behavior not only in steady state but also in transient. Next, an experimental device was constructed in which a DC motor was used as a load to the USM.Measurements were taken and finally, a comparison between the two sets of measurements was made. Those obtained by the simulation and the experimental measurements. A common pattern was observed between them which certifies the success of this thesis.

Made available in DSpace on 2015-03-03T11:52:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-05-30Bitstream added on 2015-03-03T12:06:47Z : No. of bitstreams: 1 000807345.pdf: 707423 bytes, checksum: 205e8e0f3c0e8ad8d1ab617261b02bc6 (MD5) / Objetivo: Avaliar a utilidade do uso de 10,12 e 16 fragmentos em biópsias de próstata na positividade para câncer de próstata (CaP) bem como quanto o Antígeno Prostático Específico (PSA), volume prostático, escore de Gleason, detecção de Neoplasia Intraepitelial Prostática de Alto Grau (NIPAG) e Proliferação Atípica de Pequenos Ácinos (ASAP). Métodos: É um estudo prospectivo e controlado, realizado em uma amostra consecutiva de 354 pacientes com diferentes indicações para biópsia prostática que foram submetidos ao procedimento analisando a positividade de câncer de próstata com a coleta de 10 fragmentos (base, terço médio, ápice, face medial (zona de transição) e face látero-lateral, bilateralmente) comparando com 12 fragmentos (base, terço médio, ápice e nas regiões mais laterais da base, terço médio e ápice, bilateralmente) e o total global de 16 fragmentos. Também comparada a positividade com 10, 12 e 16 fragmentos quanto ao PSA, volume prostático, escore de Gleason, NIPAG e ASAP. Resultados: Entre os 351 pacientes selecionados para biópsia de próstata, a positividade para 10 fragmentos foi de 102 pacientes (29.06%), 12 fragmentos foi de 99 pacientes (28.21%) e 16 fragmentos foi de 107 pacientes (30.48%) (p = 0.79).Os protocolos de biópsia de próstata (10,12 e 16 fragmentos) foram comparados com o PSA estratificado, volume prostático estratificado, escore de Gleason, detecção de NIPAG e ASAP não havendo diferença entre os grupos aferidos. Conclusão: O protocolo com 10 fragmentos não apresentou diferença de positividade em relação aos protocolos de 12 e 16 fragmentos, demonstrando ser um bom método para realização de primeira biópsia / Objective: To evaluate the utility of 10,12 and 16 fragments in prostate biopsies positive for the prostate cancer (PCa) as well as the Prostate Specific Antigen (PSA), prostate volume, Gleason score, Prostatic Intraepithelial Neoplasia Detection High Grade (NIPAG) and Atypical Small Acinar Proliferation (ASAP). Methods: It is a prospective controlled study performed with a sample of 354 consecutive patients with different indications for prostate biopsy who underwent the procedure analyzing the positivity of prostate cancer with the collection of 10 cores (base, middle third, apex, medial (transition zone) and latero-lateral, bilaterally) compared with 12 cores (base, middle third, apex and in areas more lateral to the base, middle third and apex, bilaterally) and the global total of 16 cores. It also was compared the positivity with 10, 12 and 16 cores, concerning the PSA, prostate volume, Gleason score, NIPAG and ASAP. Results: Among 351 patients screened for prostate biopsy positivity to 10 cores was 102 patients (29.06%), 12 cores of 99 patients (28.21%) and 16 cores of 107 patients (30.48%) (p = 0.798). The prostate biopsy protocols (10, 12 and 16 cores) were compared with the stratified PSA, stratified prostate volume,Gleason score, detection NIPAG and ASAP, there was no statistical difference. Conclusion: The protocol with 10 cores showed no difference in positivity in relation to 10 and 16 cores protocols, proving to be a good method for performing first biopsy