Index Catalog // ScholarsArchive@OSU

Characteristics of Typhlodromus americanus Chant and Yoshida-Shaul (Acari: phytoseiidae) as a biological control agent of Oligonychus ununguis (Jacobi) (Acari: tetranychidae)

Creator:: Horton, Rene N.
Abstract:: The life history, temperature, humidity, and feeding requirements of the phytoseiid predator mite, Typhlodromus americanus Chant and Yoshida-Shaul were tested in the laboratory. Occurance of the mite in the field during different times of the year was investigated as well. Effects of temperature and humidity on egg hatch, the feeding...
Resource Type:: Masters Thesis
Full Text:: : tetranychidae) AN ABSTRACT OF THE THESIS OF Rene N. Horton for the degree of Master of Science in

Dynamic control of brushless doubly-fed machines

Creator:: Zhou, Dongsheng, 1964-
Abstract:: This thesis presents the development of dynamic control strategies for the brushless doubly-fed machine (BDFM). A simple open-loop scalar controller is first investigated and its response is found to be oscillatory. Using the speed feedback signal, an improved closed loop scalar control algorithm is designed. Steady state performance is controlled...
Resource Type:: Dissertation
Full Text:: Acknowledgements The first thank goes to my major advisor Dr. Rene Spee, whose thorough and patient review of

Hardware design and protection issues in an AC/AC converter

Creator:: Faveluke, Alex
Abstract:: An AC/AC converter has been designed and implemented for the purpose of providing a modular drive system with a Brushless Doubly-Fed Machine (BDFM.) This converter is to be used in laboratory testing and also as part of a demonstration system in the field. All hardware needed to start and run...
Resource Type:: Masters Thesis
Full Text:: /AC Converter; Abstract approved: Rene Spee An AC/AC converter has been designed and implemented

A low cost AC motor drive for battery powered applications

Creator:: Wiley, Brian
Abstract:: Environmental concerns have renewed the interest in electric vehicles. To gain widespread use, electric vehicles will also have to offer good performance and be reasonably priced. AC drive systems using modern semiconductors can provide efficient operation at the required power levels, but their cost at present is still too high....
Resource Type:: Masters Thesis
Full Text:: , Corwin Alexander, Alan Wallace, and especially Rene Spec for serving as advisor as well as teacher. All

Diamondback moth (Plutella xylostella L.) ; toxicological database, resistance monitoring techniques, and intraplant distribution

Creator:: Fongsmut, Anuthep
Abstract:: The diamondback moth (Plutella xylostella L.) is a major pest of crucifer crops worldwide. It is a particularly important problem in Southeast Asia where climatic conditions favor a short generation time and rapid proliferation. In countries such as Thailand, the diamondback moth has apparently become resistant to all classes of...
Resource Type:: Masters Thesis
Full Text:: Acknowledgements First of all I would like to thank my parents for their support of my education. Thanks to Rene

Performance optimization for doubly-fed generation systems

Creator:: Bhowmik, Shibashis
Resource Type:: Dissertation
Full Text:: : Performance Optimization for Doubly-Fed Generation Systems Abstract approved: 1 René Spec A variable speed

Cytochrome P-450 monooxygenases in the mosquito, Culex pipiens

Creator:: Baldridge, Gerald D.
Abstract:: A sucrose density-gradient ultracentrifugation technique for obtaining microsomes has been developed. This technique has advantages over the classic differential centrifugation technique, in that it is faster, is better suited to work with small quantities of tissue, and offers the opportunity to work with a defined microsomal sub-cellular fraction, rather than...
Resource Type:: Masters Thesis
Full Text:: Redacted for Privacy Abstract approved: Dr. Rene Feyereisen A sucrose density - gradient

System optimization studies related to stator design and AC/AC converter selection for brushless doubly-fed machines

Creator:: Bhowmik, Shibashis
Abstract:: The advent of superior power semiconductor devices and converter topologies has renewed interest in ac drive systems. Although considerable research efforts have gone into improving power electronic converter devices and topologies, very little has been reported on the overall performance optimization of induction machine drive systems. The report of the...
Resource Type:: Masters Thesis
Full Text:: Selection for Brushless Doubly-Fed Machines ,Redacted for Privacy Abstract approved : l 6 Rene Spee

Voltage sag and momentary interruption ride-through for adjustable speed drives

Creator:: van Zyl, Annabelle
Abstract:: The awareness of electric power quality has increased over the past decade as electronic equipment has become more susceptible to power disturbances. The most disruptive power disturbances are voltage sags and momentary interruptions and their effect on adjustable speed drives (ASDs) is studied in this thesis. Several solutions have been...
Resource Type:: Dissertation
Full Text:: : Rene Sp& The awareness of electric power quality has increased over the past decade as electronic

Activity of the corpora allata of adult female Leucophaea maderae

Creator:: Acle, Dadie
Abstract:: In the cockroach Leucophaea maderae, a centre in the brain controls the female's acceptance of courting males. This centre is affected by starvation. A brief exposure to food can induce mating but is inadequate for oocyte development. In fed L. maderae there appears to be a synergistic action of nutrition...
Resource Type:: Masters Thesis
Full Text:: Privacy Dean of gradXne school N Date thesis is presented May 25,1988 ACKNOWLEDGEMENTS I wish to

ScholarsArchive@OSU

Characteristics of Typhlodromus americanus Chant and Yoshida-Shaul (Acari: phytoseiidae) as a biological control agent of Oligonychus ununguis (Jacobi) (Acari: tetranychidae)

Dynamic control of brushless doubly-fed machines

Hardware design and protection issues in an AC/AC converter

A low cost AC motor drive for battery powered applications

Diamondback moth (Plutella xylostella L.) ; toxicological database, resistance monitoring techniques, and intraplant distribution

Performance optimization for doubly-fed generation systems

Cytochrome P-450 monooxygenases in the mosquito, Culex pipiens

System optimization studies related to stator design and AC/AC converter selection for brushless doubly-fed machines

Voltage sag and momentary interruption ride-through for adjustable speed drives

Activity of the corpora allata of adult female Leucophaea maderae

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