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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.
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Determination of key factors affecting the population dynamics of Diopsis longicornis and D. apicalis (Diptera:Diopsidae), pests of rice in the Republic of Guinée, West AfricaChiasson, Hélène January 1990 (has links)
Pest status of the rice stem-borers, Diopsis longicornis and D. apicalis was not well known in the Republic of Guinee. / In the present study, adult and immature populations of both species were monitored under various local cultural practices, i.e., planting methods (direct and transplanted), different planting dates and seasons (wet and dry). As previously observed in other West African countries, D. apicalis did occasional damage to rice in Guinee. However, contrary to findings elsewhere, D. longicornis was not an important pest of Guinean rice, infesting 4% of stems over the five seasons studied. / Regulators affecting population size and behaviour of D. longicornis were determined, focusing on factors controlling the fly's quiescent period in aggregation sites during the dry season, and the insect's movement to and from these refugia. Availability of cultivated and wild rice was found to interrupt or prevent quiescence of D. longicornis. Abiotic factors, (relative humidity, rainfall and photoperiod) influenced time of dispersal of D. longicornis.
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Determination of key factors affecting the population dynamics of Diopsis longicornis and D. apicalis (Diptera:Diopsidae), pests of rice in the Republic of Guinée, West AfricaChiasson, Hélène January 1990 (has links)
No description available.
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Integration and assessment of a dual core chip - Atmel’s DIOPSIS 940 - for a flight control system.Majewski, Łukasz January 2009 (has links)
<p>A dual core Atmel DIOPSIS 940 chip consists of a DSP and an ARM9 functional units in a single silicon die. This thesis presents the process of integration and assessment of using this processor in a flight control system. A complete design of the system is provided including a description of the DIOPSIS 940 from the perspective of requirements of the application. The integration of the processor with a typical set of components of a flight control system is provided. Additionally, a suite of programs required for developing software for the system is included. Capabilities of both cores of the processor are analysed in a series of experiments. Computational performance in typical tasks of a flight control system is analyzed and compared. The application of attitude stabilization for a micro-scale UAS is described.</p>
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Integration and assessment of a dual core chip - Atmel’s DIOPSIS 940 - for a flight control system.Majewski, Łukasz January 2009 (has links)
A dual core Atmel DIOPSIS 940 chip consists of a DSP and an ARM9 functional units in a single silicon die. This thesis presents the process of integration and assessment of using this processor in a flight control system. A complete design of the system is provided including a description of the DIOPSIS 940 from the perspective of requirements of the application. The integration of the processor with a typical set of components of a flight control system is provided. Additionally, a suite of programs required for developing software for the system is included. Capabilities of both cores of the processor are analysed in a series of experiments. Computational performance in typical tasks of a flight control system is analyzed and compared. The application of attitude stabilization for a micro-scale UAS is described.
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