• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • 1
  • Tagged with
  • 4
  • 4
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • 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.
1

Hybrid density functional studies of hydrogen storage related molecular systems /

Diaconu, Cristian V. January 2005 (has links)
Thesis (Ph.D.)--Brown University, 2005. / Vita. Thesis advisor: Jimmie D. Doll. Includes bibliographical references (leaves 159-170). Also available online.
2

Crescimento do matrinxã,Brycon cephalus (Gunther,1869) criados em gaiolas flutuantes construídas com matéria-prima da região amazônica

TORTOLERO, Simón Alexis Ramos 03 September 2003 (has links)
Submitted by (edna.saturno@ufrpe.br) on 2017-02-22T12:26:04Z No. of bitstreams: 1 Simon Alexis Ramos Tortolero.pdf: 3071844 bytes, checksum: 218783227c44cc0264b728cf76faec2c (MD5) / Made available in DSpace on 2017-02-22T12:26:04Z (GMT). No. of bitstreams: 1 Simon Alexis Ramos Tortolero.pdf: 3071844 bytes, checksum: 218783227c44cc0264b728cf76faec2c (MD5) Previous issue date: 2003-09-03 / Son presentados los primeros resultados obtenidos sobre la criación del, Brycon cephalus, en jaulas de pequeño volumen utilizando altas densidades en el Lago do Catalão latitud 3° 09′ 75′′ Sul, longitud 59° 54′ 51′′ W município de Iranduba – AM. El objetivo fue generar informaciones que subsidien la piscicultura sostenible en el Amazonas, ya que son pocos los trabajos desarrollados en esta modalidad en la región. Por otro lado, se definió un prototipo de jaula flotante utilizando materia prima de la propia región, observandose los aspectos de costos operacionales y culturales. Fueron utilizadas 12 jaulas cada una de ellas de 1m3 , construidas de paxuíba, Iriartea exorrhiza, bambu, Guadua angustifólia, taboca, Guadua superba y cipó titica, Heteropsis jemanii , sostenidas en la superfície del agua por un sistema de flotación constituido por assacú, Hura crepitans e jacareuba, Calophyllum brasiliensis. Los materiales utilizados en la construcción de las jaulas, presentaron buen estado de conservación en el medio aquatico durante el periodo del experimento. En el experimento fueron utilizadas densidades de 100, 150, 200 e 250 peces/m3, alimentados con ración extrusada (peletada cohesionada) conteniendo 36% de PB, diariamente hasta la saciedad. El desarrollo de los peces fue acompañado a travez de mediciones mensuales, retirandose 10 peces de cada jaula. Fueron realizadas observaciones diarias sobre el comportamiento alimentar de esa especie. La conversión alimentar media de las densidades de 150 e 200 peces/m3 fueron de 0,911: 1 y 0,926: 1 respectivamente. Las tasas de stock influenciaron en el aumento de peso, indicando que las densidades de 150 e 200 peces/m3 fueron las mejores para este sistema de criación, pues presentaron mayores rendimientos y productividades que la densidad de 100 peces/m3 y 250 peces/m3. / São apresentados os primeiros resultados obtidos sobre a criação do matrinxã, Brycon cephalus, em gaiolas de pequeno volume utilizando altas densidades no Lago do Catalão latitude 3° 09′ 75′′ Sul, longitude 59° 54′ 51′′ W município de Iranduba – AM. O objetivo foi gerar informações que subsidie a piscicultura sustentável no Amazonas, já que são poucos os trabalhos desenvolvidos nesta modalidade na região. Por outro lado, definiu-se um protótipo de gaiola flutuante utilizando matéria prima da própria região, observando-se os aspectos de custos operacionais e culturais. Foram utilizadas 12 gaiolas de 1m3 cada, construídas de paxuíba, Iriartea exorrhiza, bambu, Guadua angustifólia, taboca, Guadua superba e cipó titica, Heteropsis jemanii , sustentadas na superfície da água por um sistema de flutuação constituído por assacú, Hura crepitans e jacareuba, Calophyllum brasiliensis. Os materiais utilizados apresentaram bom estado de conservação no meio aquático durante o período do experimento. No experimento foram utilizadas densidades de 100, 150, 200 e 250 peixes/m3, alimentados com ração extrusada contendo 36% de PB, diariamente até saciedade. O desenvolvimento dos peixes foi acompanhado através de mensurações mensais, retirando-se 10 peixes de cada gaiola. Foram realizadas observações diárias sobre o comportamento alimentar dessa espécie. A conversão alimentar média das densidades de150 e 200 peixes/m3 foram de 0,911: 1 e 0,926: 1, respectivamente. As taxas de estocagem influenciaram no ganho de peso, indicando que as densidades de 150 e 200 peixes/m3 foram as melhores para este sistema de criação, pois apresentaram maiores rendimentos e produtividades que a densidade de 100 peixes/m3 e 250 peixes/m3.
3

Multiplexing Techniques and Design-Automation Tools for FRET-Enabled Optical Computing

Mottaghi, Mohammad January 2014 (has links)
<p>FRET-enabled optical computing is a new computing paradigm that uses the energy of incident photons to perform computation in molecular-scale circuits composed of inter-communicating photoactive molecules. Unlike conventional computing approaches, computation in these circuits does not require any electric current; instead, it relies on the controlled-migration of energy in the circuit through a phenomenon called Förster Resonance Energy Transfer (FRET). This, coupled with other unique features of FRET circuits can enable computing in new domains that are unachievable by the conventional semiconductor-based computing, such as in-cell computing or targeted drug delivery. In this thesis, we explore novel FRET-based multiplexing techniques to significantly increase the storage density of optical storage media. Further, we develop analysis algorithms, and computer-aided design tools for FRET circuits.</p><p>Existing computer-aided design tools for FRET circuits are predominantly ad hoc and specific to particular functionalities. We develop a generic design-automation framework for FRET-circuit optimization that is not limited to any particular functionality. We also show that within a fixed time-budget, the low-speed of Monte-Carlo-based FRET-simulation (MCS) algorithms can have a potentially-significant negative impact on the quality of the design process, and to address this issue, we design and implement a fast FRET-simulation algorithm which is up to several million times faster than existing MCS algorithms. We finally exploit the unique features of FRET-enabled optical computing to develop novel multiplexing techniques that enable orders of magnitude higher storage density compared to conventional optical storage media, such as DVD or Blu-Ray.</p> / Dissertation
4

Selective offload capability simulation (SOCS) : an analysis of high-density storage configurations

Futcher, Frank W. 09 1900 (has links)
Approved for public release; distribution in unlimited. / Future sea bases, such as the Maritime Prepositioning Force (Future), will serve as key distribution nodes and must be able to sustain forces ashore and selectively offload supplies from storerooms quickly and efficiently. Current MPF ships maximize the available cargo storage onboard and have little ability to selectively offload supplies. To make selective offload a reality, MPF(F) requires lower stowage densities and new technologies to efficiently move items, especially for those supplies needed in direct support of forces ashore. The difficult questions are how dense and in what configurations MPF(F) storerooms can be packed, and how items should be retrieved in order to selectively offload supplies and provide acceptable response time. We analyze the trade-off between storage density and mean retrieval time in a dynamic environment for different storage densities and configurations in notional storerooms aboard a future sea base. We examine two demand scenarios and two different retrieval rules to determine how each storage configuration responds to retrieval requests over time. Our results provide insight into the types of storeroom configurations that provide the best mean retrieval times and how a simple retrieval rule can significantly reduce mean retrieval time under certain demand conditions. / Lieutenant Commander, United States Navy

Page generated in 0.0619 seconds