Thesis (M.Comp.Sc.-Res.)--University of Wollongong, 2007. / Typescript. Includes bibliographical references: leaf 57-62.

Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2010. / Committee Chair: Hu, Xiaoping; Committee Co-Chair: Vachtsevanos, George; Committee Member: Butera, Robert; Committee Member: Gurbaxani, Brian; Committee Member: Mayberg, Helen; Committee Member: Yezzi, Anthony. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Thesis (M.S.)--West Virginia University, 2010. / Title from document title page. Document formatted into pages; contains viii, 75 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 72-75).

Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 76-78). Also available on the World Wide Web.

Thesis (Ph. D.)--University of Chicago, Dept. of Mathematics, June 1999. / Includes bibliographical references. Also available on the Internet.

No description available.

Thesis (M.Sc. (Statistics)) - Rhodes University, 2009. / A thesis submitted to Rhodes University in partial fulfillment of the requirements for the degree of Master of Science in Mathematical Statistics.

Η παρούσα διπλωματική εργασία πραγματεύεται την μελέτη και την υλοποίηση του διανυσματικού ελέγχου ενός τριφασικού ασύγχρονου κινητήρα. Η εργασία αυτή εκπονήθηκε στο Εργαστήριο Ηλεκτρομηχανικής Μετατροπής Ενέργειας του Τμήματος Ηλεκτρολόγων Μηχανικών και Τεχνολογίας Υπολογιστών της Πολυτεχνικής Σχολής του Πανεπιστημίου Πατρών. Σκοπός μας είναι η μελέτη, η επιλογή και τελικά η υλοποίηση ενός συγκεκριμένου είδους διανυσματικού ελέγχου ασύγχρονου τριφασικού κινητήρα μέσω της χρήσης ψηφιακού μικροελεγκτή . Αρχικά, γίνεται μια αναφορά στα κινητήρια συστήματα και στην σημασία των ασύγχρονων κινητήρων σε ένα ηλεκτρικό κινητήριο σύστημα καθώς και στον έλεγχο αυτών και δη το διανυσματικό. Στη συνέχεια, μελετώνται η βασική αρχή λειτουργίας, οι μαθηματικές εξισώσεις, τα μοντέλα λειτουργίας καθώς και τα κατασκευαστικά χαρακτηριστικά των ασύγχρονων μηχανών αλλά και της μηχανής που χρησιμοποιήθηκε στην πειραματική μας διάταξη. Στο επόμενο βήμα, γίνεται μια πολύ σύντομη ιστορική αναδρομή στην ανάπτυξη του διανυσματικού ελέγχου , εισαγωγή και θεωρητική ανάλυση σε βάθος των αρχών αυτού και αναλυτική παρουσίαση όλων των ειδών του. Τέλος, καταλήγουμε στην επιλογή της μεθόδου που θα χρησιμοποιήσουμε. Συνεχίζοντας, κάνουμε μια εισαγωγή στους ηλεκτρονικούς μετατροπείς ισχύος και αναλύουμε τον τριφασικό αντιστροφέα τάσης που χρησιμοποιήθηκε στην παρούσα διπλωματική εργασία. Επόμενο βήμα είναι η παρουσίαση και η περιγραφή του μικροεπεξεργαστή dsPIC30F4011 της εταιρίας Microchip ενώ περιγράφεται αναλυτικά και η διαδικασία ανάπτυξης του προγράμματος για την υλοποίηση του διανυσματικού ελέγχου. Τέλος, παρατίθενται οι κυματομορφές που προέκυψαν από τα πειράματα που διενεργήθηκαν μετά την ολοκλήρωση του προγράμματος και του ελέγχου του. / This diploma thesis addresses the design and implementation of vector control of a three-phase asynchronous motor. The project was based at the Laboratory of Electromechanical Energy Conversion, Department of Electrical and Computer Engineering School of Engineering, University of Patras. Our objective is the study, the choice and ultimately the implement of a specific type of vector controlfor a three-phase asynchronous motor using digital microcontroller. Initially, there is a reference to the electric drive systems and to the importance of an asynchronous motor in an electric drive system and to its control, especially the vector control. Following there is a theoretical analysis of the basic principle of operation,the mathematical equations, the models of operation and the construction of an asynchronous machine. The next step is a very brief historical reference to the development of vector control.There is also a theoretical analysis of the principles of this and detailed presentation of all the species. Finally, we conclude to the method we used. Our next step is to present the electronic power converters and to analyze the three-phase inverter which was used in this diploma thesis. Following, there is a presentation and description of the microprocessor dsPIC30F4011(Microchip).Just after that,we describe the process of program development for the implementation of vector control in a detailed analysis . Finally, we present the waveforms coming up from the experiments that we carried out after the completion of the process of vector control.

Made available in DSpace on 2015-03-03T11:52:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-07-28Bitstream added on 2015-03-03T12:06:09Z : No. of bitstreams: 1 000810574_20160728.pdf: 555774 bytes, checksum: a1eafb543fd960c6eb728f54e4d8d4fa (MD5) Bitstreams deleted on 2016-07-29T12:53:57Z: 000810574_20160728.pdf,. Added 1 bitstream(s) on 2016-07-29T12:54:50Z : No. of bitstreams: 1 000810574.pdf: 619509 bytes, checksum: 02da17d2039311135a8a7eb0b12e2091 (MD5) / A dengue, doença infecciosa aguda, causada por um vírus da família Flaviviridae e transmitida aos humanos pela picada dos mosquitos do gênero Aedes, é considerada um dos principais problemas de saúde pública no mundo. O Aedes aegypti é o único vetor conhecido nas Américas e no Brasil está presente nos 26 estados e no distrito federal. A indisponibilidade de uma vacina que imunize a população contra os quatro sorotipos da dengue restringe a prevenção da doença ao controle do vetor. Isto é feito por aplicações de inseticidas químicos, porém o uso frequente em altas doses tem selecionado populações resistentes do mosquito. Diante dessa situação há necessidade de se buscar produtos alternativos que tenham efeito nestas populações. Diversos estudos demonstraram que os óleos essenciais de Syzygium aromaticum e Citrus sinensis apresentam pronunciada atividade larvicida, assim, este trabalho teve por objetivo avaliar o potencial destes produtos como alternativa de controle larvicida para populações de A. aegypti resistentes ao organofosforado temephos e verificar o efeito da associação deste inseticida aos óleos essenciais sobre a atividade larvicida. Avaliou-se também, a influência dos óleos essenciais na oviposição do vetor quando presentes nos sítios de postura. A comparação da atividade larvicida nas populações resistentes e suscetíveis foi realizada por meio das concentrações letais obtidas em ensaios de dose-resposta, seguindo metodologia proposta pela Organização Mundial da Saúde. Para avaliar o efeito da associação dos óleos essenciais ao temephos comparou-se a atividade larvicida das associações com a do temephos e o efeito no comportamento de oviposição foi avaliado pela comparação do número de ovos colocados nos sítios de postura, contendo soluções dos óleos essenciais em relação aos contendo somente água. Os resultados revelaram que os óleos essenciais exerceram atividade ... / Dengue fever an acute infectious disease caused by Flaviviridae family virus, transmitted to humans by the mosquitoes bite of Aedes genus. It is considered one of the most public health problems in the world. The Aedes aegypti is the only known vector in the Americas and in Brazil is present in 26 states and the federal district. The unavailability of a vaccine to immunize people against the four dengue serotypes restricted the disease prevention to the vector control. The control is done by chemical insecticides application, but the frequent use in high doses, have selected resistant mosquito populations. In front of this situation, it is necessary to seek for alternative products that have effect on these populations. Several studies demonstrated that Syzygium aromaticum and Citrus sinensis essential oils have larvicidal activity, so the aim of this study was to evaluate the potential of the essencial oils as an alternative to control A. aegypti larvae resistant to the organophosphate temephos and analyze the effect of this insecticide and essencial oils association on the larvicidal activity. It was evaluated too the influence of essencial oils on vector oviposition, when present on the posture sites. The larvicidal activity was assessed by dose-response tests, according to the methodology proposed by the World Health Organization. To evaluate the effect of essential oils associatiate with temephos, the larvicidal associations activity was compared with the temephos. The effect on oviposition behavior was evaluated comparing the number of eggs in laying sites containing essential oils in relation to the number of eggs in laying sites containing only water. The results demonstrated that essential oils had larvicidal activity in resistant and susceptible to temephos populations, being an alternative to resistance management. The association of temephos and essential oils had an antagonist ...

Orientador: Paulo Milton Barbosa Landim / Banca: Ene Glória da Silveira / Banca: Luzia Aparecida Trinca / Banca: Roberto Wagner Lourenço / Banca: Antonio Carlos Simões Pião / Resumo: O município de Porto Velho teve sua ocupação marcada por um sério desordenamento urbano, que resultou, entre outros, em aglomerados populacionais de baixa renda, originados de migrações externas e internas que se assentaram em locais impróprios para a urbanização. Isso deu origem a conflitos sócio-ambientais e de saúde pública, ou seja, contribuiu para uma crescente insuficiência dos serviços de saneamento e para o incremento da pobreza. A deterioração das condições de vida no município criou ambientes favoráveis à proliferação de vetores transmissores de doenças parasitárias, contribuindo para a intensificação da transmissão no meio urbano e para o agravamento do problema de saúde pública, em especial pela malária. A maioria da população portovelhense habita áreas com elevado risco de transmissão, pois vive em locais com ambientes propícios à formação de criadouros dos mosquitos que transmitem a malária, tais como: nascentes, drenagens, áreas alagadas e florestas remanescentes. Há também, em algumas áreas, evidência de vegetação equatorial úmida, de maneira a tornar a cidade vulnerável à proliferação de mosquitos anofelinos, vetores de malária, especialmente em áreas com freqüência de migrantes. O município, hoje, detém pouco mais de 25% dos casos de malária do Estado de Rondônia, isso porque o crescimento populacional acelerado cria uma série de problemas urbanos de infra-estrututa em todos os aspectos. O modelo de políticas públicas atuais não é eficiente na erradicação da doença na área urbana. Em razão dos problemas expostos, esse estudo teve por objetivo mapear as possíveis áreas de maior prevalência do vetor transmissor da doença, associando-as aos problemas sócio-ambientais para que essas informações possam orientar o poder público e a sociedade, com o fim de interferir no controle da endemia eficientemente. / Abstract: Porto Velho municipal district had its occupation characterized by a serious disordering process, which has resulted in agglomerations of low income people, originated from external and internal migration which had been settled in improper areas, therefore this occupation originated social-environmental and public health conflicts, contributing to an increasing sewage inadequacy and poverty. The degradation process of life standards in the municipal district led to favorable conditions for the proliferation of vector transmitter parasitic diseases, contributing to the disease spreading in urban areas and the aggravation of public health problems, particularly malaria. The majority of Porto Velho's population inhabits areas where there are several transmission risks, due the high incidence of malaria transmitter mosquitoes that live in water nascent, drainage, flooded and forest remained areas. There is also, in some areas, equatorial humid vegetation, turning the place vulnerable to the proliferation of malaria mosquito transmitters, particularly in areas with high frequency of migrants. The municipal district has nowadays more than 25% of malaria cases in Rondonia, mainly because of disordered population increasing, which creates urban problems in all aspects. The public politics used nowadays aren't efficient on eradicating the disease in urban areas. Due to the exposed problems, this study aims to map the potential malaria prevalence areas, associating to the socio-environment problems in order to orientate government and society to control, properly, the endemic malaria. In order to accomplish this task, there was used specific statistical techniques of multiple correspondence analysis, applied to physical environment and adapted to the social area. / Doutor