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  • 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.
31

CFD as applied to the design of short takeoff and landing vehicles using circulation control a thesis /

Ball, Tyler Matthew. Marshall, David D., January 1900 (has links)
Thesis (M.S.)--California Polytechnic State University, 2008. / Mode of access: Internet. Title from PDF title page; viewed on March 17, 2009. Major professor: David D. Marshall. "Presented to the faculty of California Polytechnic State University, San Luis Obispo." "In partial fulfillment of the requirements for the degree of Master of Science in Aerospace Engineering." "June 2008." Includes bibliographical references (p. 126-127). Also available on microfiche.
32

Decision-making in sport an examination of the Take the First heuristic and self-efficacy theory /

Hepler, Teri J. January 2008 (has links)
Thesis (Ph. D.)--Michigan State University. Kinesiology, 2008. / Title from PDF t.p. (Proquest, viewed on Aug. 17, 2009) Includes bibliographical references (p. 105-109).
33

Prediction of circulation control performance characteristics for super STOL & STOL applications

Naqvi, Messam Abbas. January 2006 (has links)
Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2007. / Dimitri N. Mavris, Committee Chair ; Lakshmi N. Sankar, Committee Member ; Daniel P. Schrage, Committee Member ; Robert J. Englar, Committee Member ; Robert C. Michelson, Committee Member.
34

The role of planning in marine resource management : the effect of differing legislative mandates on the Atlantic large whale take reduction plan /

Bettridge, Shannon Olivia Marie. January 2005 (has links)
Thesis (Ph. D.)--University of Rhode Island, 2005. / Typescript. Includes bibliographical references (leaves 257-269).
35

Role of 2,4-diacetylphloroglucinol-producing Pseudomonas fluorescens in the suppression of take-all and pythium root rot of wheat

Allende-Molar, Raul, January 2006 (has links) (PDF)
Thesis (Ph. D.)--Washington State University, December 2006. / Includes bibliographical references.
36

Tolerância de cana-de-açúcar a herbicidas avaliada pela diferença testemunha pareada e tratamento

Schiavetto, Ana Regina [UNESP] 25 November 2010 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:26:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-11-25Bitstream added on 2014-06-13T19:54:06Z : No. of bitstreams: 1 schiavetto_ar_me_jabo.pdf: 1906023 bytes, checksum: f74f3d8916abc28806f1a1138918fa89 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Com o objetivo de avaliar a tolerância de cultivares de cana-de-açúcar a misturas de herbicidas aplicados em pós-emergência inicial da cultura o experimento foi conduzido em área de produção comercial da Usina São Martinho, localizada no município de Pradópolis, SP. O estudo foi desenvolvido em campo no delineamento de blocos casualizados em esquema fatorial com 48 tratamentos em duas repetições. Os tratamentos foram constituídos pelas cultivares (RB855453; RB845257, SP90-3414, SP90-1638, SP89-1115; SP81-3250, IAC91-2218 e IAC91-5155) e pelos herbicidas T1=(sulfentrazone (500 g ha-1) + diuron (842,4 g ha-1) + hexazinone (237,6 g ha-1); T2=metsulfuron-methyl (6 g ha-1) + sulfentrazone (750 g ha-1); T3=diuron (842,4 g ha-1) + hexazinone (237,6 g ha-1) + clomazone (900 g ha-1); T4=metribuzin (1920 g ha-1) + diuron (842,4 g ha-1) + hexazinone (237,6 g ha-1); T5=diuron (1599 g ha-1) + hexazinone (201 g ha-1) + MSMA (360 g ha-1); T6=ametryn (1097,25 g ha-1) + trifloxysulfuron-sodium (27,75 g ha-1) + diuron (702 g ha-1) + hexazinone (198 g ha-1)) e uma testemunha pareada para cada parcela. Os herbicidas foram aplicados sobre a palha oriunda da colheita da cana-de-açúcar em pré-emergência das plantas daninhas e pós-emergência inicial da cultura. Todas as parcelas mantidas na ausência de plantas daninhas durante todo período experimental. Cada parcela foi constituída por seis linhas, sendo uma central de meia parcela, tratada (TH); e a central da outra meia parcela, testemunha pareada (TP). As outras linhas foram bordaduras Foram avaliados aos 20 e 50 dias após aplicação (DAA) os sintomas visuais de fitointoxicação, o teor relativo de clorofila total e a razão de fluorescência da clorofila a; medições de altura foram feitas aos 30, 90 e 180 DAA e de estande aos 30, 90 e 180 DAA. Por ocasião da colheita aos 210 DAA foram avaliados o diâmetro dos colmos, os teores... / The experiment was conducted sugarcane commercial area from Sao Martinho will in Pradópolis, SP, in order to evaluate the tolerance of sugarcane cultivars to the association of herbicides applied post-emergence culture. The study was conducted in the field in a randomized block design in factorial with 48 treatments in two replications. The treatments consisted of cultivars (RB855453, RB845257, SP90-3414, SP90-1638, SP89-1115, SP81-3250, and IAC91-2218 IAC91-5155) and the herbicide T1=(sulfentrazone (500 g ha-1) + diuron (842,4 g ha-1) + hexazinone (237,6 g ha-1); T2=metsulfuron-methyl (6 g ha-1) + sulfentrazone (750 g ha-1); T3=diuron (842,4 g ha-1) + hexazinone (237,6 g ha-1) + clomazone (900 g ha-1); T4=metribuzin (1920 g ha-1) + diuron (842,4 g ha-1) + hexazinone (237,6 g ha-1); T5=diuron (1599 g ha-1) + hexazinone (201 g ha-1) + MSMA (360 g ha-1); T6=ametryn (1097,25 g ha-1) + trifloxysulfuron-sodium (27,75 g ha-1) + diuron (702 g ha-1) + hexazinone (198 g ha-1)) and a paired control for each plot. Herbicides were applied over the straw coming from the crop of sugarcane in pre-emergence weed and post-emergence of the crop, all plots being maintained in the absence of weeds throughout the experimental period. Which plot was formed by 6 rows of sugarcane. The central one of each 3 rows were used as treated (TH) and paired control (TP). The other rows were borders. Were evaluated at 20 and 50 days after application (DAA) visual symptoms, total chlorophyll and the ratio of chlorophyll a fluorescence; height measurements were made at 30, 90 and 180 DAA and stand at 30, 90 and 180 DAA. At harvest at 210 DAS were evaluated for stem diameter, the brix, purity, pol, sugars (AR) in the juice, cane fiber, total sugar recovered (ATR) and production of the stems (t ha-1). The mean difference, TP-TH, was subjected to the t tests, using the hypothesis of the difference with zero... (Complete abstract click electronic access below)
37

An examination of urban area S.T.O.L. airports

Morris, David William January 1970 (has links)
This thesis is an examination of the problems that may arise from the location of S.T.O.L. airports within urbanized areas. The role of air transportation as a passenger travel mode is considered and the problems facing the existing air transportation system are explored. The potential role of S.T.O.L. aircraft within the air transportation system is examined in detail. Additionally, the benefits that may accrue from the use of S.T.O.L. aircraft in a regional air transport system are discussed extensively. The criteria to be used when looking for potential S.T.O.L. airport sites are examined in detail. These criteria are applied to three potential S.T.O.L. airport sites within the Vancouver urban area. In some cases the locational criteria were found to be difficult to operationalize. Data on community reaction to noise exposure is inadequate and noise standards are difficult to apply on a wide basis. The concept of land use compatibility around airports is useful but only to the extent that it does not obscure the fact that aircraft operations can cause community disruptions beyond the boundaries of the so-called compatible land uses. With specific reference to Vancouver, the available data indicates, that on the average, very little terminal access or egress time will be saved if a S.T.O.L. airport were built at a suitable location between the existing airport and the downtown area. Finally, the paper concludes by suggesting that despite the fact that S.T.O.L. aircraft cannot bring substantial time savings to regional air passengers, a S.T.O.L. air service may mean that many of the regions under utilized conventional airports could be converted to S.T.O.L. airports and yeild substantial savings in the money used to maintain and operate the publically owned airports in the province. / Applied Science, Faculty of / Community and Regional Planning (SCARP), School of / Graduate
38

Differences in Ground Reaction Forces between Take-Offs that are Out, On, or Under in the Pole Vault

Francis, Shawn Michael January 2012 (has links)
Aim. The take-off is regarded as the most important phase of the pole vault yet there is an insufficient amount of research on the ground reaction forces of the pole vault takeoff. At this time there is not any scientific research comparing force and time between takeoffs that are out, on and under. The purpose of this study is to compare the differences in ground reaction forces between pole vault take-offs that are out, on or under. Methods. Over five days, 15 male and female college pole vaulters completed 226 vaults on a (AMTI Accupower) force plate. The jumps were put into categories of out, on and under and analyzed by Accupower, and Dartfish software. Separate mixed modal ANOVAs (SAS 9.3) were applied (P≤.05) for comparison between jump types. Conclusions. There is no significant difference between ground reaction forces of the three jump types.
39

PCR-Based Test for Differentiating Varieties of <i>Gaeumannomyces graminis</i>, The Take-All Pathogens

Rachdawong, Sansanalak 11 April 1999 (has links)
Take-all is the most devastating root disease of wheat worldwide. The causal agent is <I>Gaeumannomyces</I> <I>graminis</I> (Sacc.) Arx & Olivier. Based on morphological characteristics and host ranges, three varieties of <I>G</I>. <I>graminis</I> have been recognized. <I>G</I>. <I>graminis</I> var. <I>tritici</I> Walker (Ggt) is the major causal agent of take-all of wheat and barley and the most economically important take-all pathogen. <I>G</I>. <I>graminis</I> var. <I>avenae</I> (Turner) Dennis (Gga) attack oats and causes take-all patch of turf grasses while <I>G</I>. <I>graminis</I> var. <I>graminis</I> (Ggg) is pathogenic on turf grasses but is non-pathogenic on wheat. Conventional diagnosis of take-all pathogens is based on field symptoms such as blackened roots, stunted growth, and white-heads and morphological characteristics such as hyphopodia type, size of perithecia, asci, and ascospores. These procedures are time-consuming, laborious, and often inconclusive. The objective of this study was to develop a rapid, simple, and specific method for differentiation of <I>G</I>. <I>graminis</I> varieties using PCR and molecular-based technology. Exploitation of genes associated with pathogenicity of <I>G</I>. <I>graminis</I> as markers for the test was proposed. Metabolic activities of <I>G</I>. <I>graminis</I> associated with pathogenesis were investigated, namely, the abilities to produce avenacinase and to oxidize manganese. Avenacinase, an avenacin detoxifying enzyme, was associated with Gga pathogenicity for oats but this enzyme is not important in Ggt pathogenicity for wheat. Manganese oxidation was also correlated with Ggt virulence. In this study, avenacinase-like genes were discovered in Ggt and Ggg and manganese oxidation was confirmed for Ggt, Gga, and Ggg. All isolates of Ggt except isolate ATCC 28230 were manganese oxidizers. Ggg and Gga isolates could oxidize manganese but their precipitation patterns were not as intense or closely correlated with mycelial growth as for Ggt. Pathogenicity assays on oats for Ggt, Gga, and Ggg isolates confirmed that Ggt isolates could not cause disease on oats aside from occasional slight root damage. Root weight was reduced for oat seedlings inoculated with Gga isolates. Comparison of partial sequences of avenacinase-like genes from Ggt and Ggg showed strong homology to that of Gga (94.8% identity to Ggt and 94.6% identity to Ggg). However, the Ggt gene was more closely related to that of Ggg (99.2% identity) than to Gga. DNA restriction endonuclease polymorphisms of the genes supported DNA sequencing information and revealed that there were variations within the genes among Ggt, Gga, and Ggg. Variety-specific electrophoretic patterns were obtained when the genes were digested with <I>Hae</I>III. Ggt, Gga, and Ggg upstream (5') variety-specific primers and a downstream (3') universal primer were designed from the avenacinase and avenacinase-like DNA sequences. PCR amplification with Ggt-, Gga-, and Ggg-specific primers generated fragments of 870, 617, and 1,086 bp, respectively. Each 5'-specific primer showed high specificity for its own DNA template in mixed populations of DNA templates. The optimized PCR procedure was sensitive to DNA template concentration as low as 100 pg. Genomic DNA of sixteen Ggt isolates, seven Gga isolates, and five Ggg isolates were tested. Although all Ggt isolates were originally isolated from wheat, seven isolates produced Ggg-specific fragments. This result corresponded well with <I>Hae</I>III DNA polymorphisms, pathogenicity assay, and manganese oxidizing ability. All but one Gga isolates produced the variety-specific fragment. Ggt- and Gga- specific products were generated from Gga isolate RB-W. Although Ggg-specific fragments were produced from all Ggg isolates, non-specific products were also observed from isolates that were not from wheat origin suggesting some genetic variations due to host ranges. Additionally, no non-specific amplification was obtained from any closely related fungi such as <I>Gaeumannomyces</I> <I>cylindrosporus</I> or <I>Phialophora</I> spp. The test developed in this study is the first test capable of identification of Ggt, Gga, and Ggg in a single PCR tube with a basic PCR protocol. The test is rapid and specific. Interpretation of results is simple and conclusive based on differences in size of each variety-specific fragment. / Ph. D.
40

A CURRENT-BASED WINNER-TAKE-ALL (WTA) CIRCUIT FOR ANALOG NEURAL NETWORK ARCHITECTURE

Rijal, Omkar 01 December 2022 (has links)
The Winner-Take-All (WTA) is an essential neural network operation for locating the most active neuron. Such a procedure has been extensively used in larger application areas. The Winner-Take-All circuit selects the maximum of the inputs inhibiting all other nodes. The efficiency of the analog circuits may well be considerably higher than the digital circuits. Also, analog circuits’ design footprint and processing time can be significantly small. A current-based Winner-Take-All circuit for analog neural networks is presented in this research. A compare and pass (CAP) mechanism has been used, where each input pair is compared, and the winner is selected and passed to another level. The inputs are compared by a sense amplifier which generates high and low voltage signals at the output node. The voltage signal of the sense amplifier is used to select the winner and passed to another level using logic gates. Also, each winner follows a sequence of digital bits to be selected. The findings of the SPICE simulation are also presented. The simulation results on the MNIST, Fashion-MNIST, and CIFAR10 datasets for the memristive deep neural network model show the significantly accurate result of the winner class with an average difference of input and selected winner output current of 0.00795uA, 0.01076uA and 0.02364uA respectively. The experimental result with transient noise analysis is also presented.

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