Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"PSU"”.
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High Efficiency High Power Density Gan Based Power Supply Unit (PSU) for Data Center Application
… high efficiency and high power density server PSU. A two-stage topology is considered where an active front end rectifier converts 208VAC 3-phase supply to 380VDC. An isolated DC-DC LLC converter employing a planar integrated matrix transformer steps down the 380VDC to 48VDC for further …
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Estudio cuantitativo sobre el efecto de variables estructurales en el incremento entre el SIMCE y la PSU. Un acercamiento al modelo de valor agregado
… el incremento entre el SIMCE de 2° medio y la PSU. Para esto se realizó un modelo de regresión logística utilizando dos pruebas aplicadas a una misma generación: el SIMCE de 2° medio de 2001 y la PSU de 2003. Los resultados más importantes entregados por este estudio fueron que, del conjunto de …
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The Effects of Salinity on Zootechnical Performance of Spotted Seatrout (<i>Cynoscion nebulosus</i>) in Recirculating Aquaculture Systems
… of this species currently uses salinities of 25 psu or greater making production challenging in areas where high salinity water is not available. This study aimed to document the effects of salinity on zootechnical performance of spotted seatrout embryos, early larvae, and juveniles in …
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Maturation Spawning and Larviculture of Atlantic Croaker (Micropogonias undulatus) at Low Salinity
… of Croaker broodstock at 10, 20, and 30 psu during the maturation period was compatible with the completion of gametogenesis in both sexes. Results of hormonal induction of spawning revealed that sperm production, ovulation rates, fecundity, and fertility of spawns were reduced at 10 psu …
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High School's Principals' and Teachers' Perceptions of Peach State University's Professional Development School Model
… achievement.</p> <p>Peach State University (PSU) chose to use the Professional Development School model to fulfill the state's mandate to form "functional units" with public schools. In 1998, Professional Development School collaboratives were developed with five area high schools. The …
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Hervey Bay - insights from numerical modelling into the hydrodynamics of an Australian subtropical bay
… einen nahezu konstanten Salzgradient von 0.5 psu, mit einem Salzgehalt von 35.5 psu im offenen Ozean und Spitzenwerten von über 39.0 psu im küstennahen Bereich. Die Untersuchung zeigen desweiteren, dass die Passatwinde den Wasseraustausch in der Bucht dominieren. Aufgrund von lang anhaltenden …
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Understanding the effect of perceived supervisor unavailability on job satisfaction, counterproductive work behaviors, and intent to quit
… introduced perceived supervisor unavailability (PSU), as employee's perception that their supervisor is not present, reachable, or responsive when support is needed. Grounded in Job Demands-Resources and Social Exchange Theory, we looked at personal (role clarity) and organizational resources …
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Water Column Ammonium Concentration and Salinity Influence Nitrogen Uptake and Growth of Spartina Alterniflora
… 10, and 100 µM), and salinity (20, 30, and 40 psu) treatments in a fully crossed factorial design were measured in greenhouse microcosms with tidal simulation in Statesboro, GA from April-October, 2013. Prior to the factorial study, a three month pilot study comparing <em>S. alterniflora …
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Responses to salinity of color polymorphs in two populations of the sea star, Pisaster achraceus
… State, and three salinities (22, 30, and 40 psu).</p> <p>Wet mass-specific oxygen consumption rates were not significantly affected by color, location, or salinity, and Dry mass-specific oxygen consumption rates showed no significant differences for main effects, but a three-way interaction …
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Statistical methods in a high school transcript survey
… in designs where a single primary sampling unit (PSU) is sampled in some strata, direct variance estimates for these strata are not possible. Alternative variance estimation procedures for strata with one PSU sampled are studied. The first option is a collapsed strata variance estimator followed …
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Factors Influencing the Morphology of Sea Ice
… polymeric substances (EPS). Salinities of 10 psu, 20 psu, and 30 psu, were used at the following temperatures: -20°C, -10°C and -5°C. The temperature and salinity data showed that the growth rate of ice, increases with the decreasing ambient temperature, decreasing starting artificial sea ice …
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Taxonomia e distribuição geográfica dos Monstrilloida (Copepoda - Crustacea) do Atlântico sul ocidental
… 27 and 37 ºC and salinity between 35.4 and 36.4 PSU. These values are characteristic of the Shelf and Tropical Waters in the region. Monstrilla brasiliensis. M. careli. M. satchmoi, M bahiana, and Monstrillopsis gracilis occurred in Area 2, restricted to coastal zone of Bahia (Brazil). with …
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Quality assurance in Saudi Arabian higher education
… universities (namely, Prince Sultan University [PSU] and King Abdulaziz University [KAU]), and thereby to contribute to both closing the literature gap on the Saudi Arabian higher education system and development of internal quality assurance model. This is a qualitative, multiple-case study that …
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Role of hydrocarbon pollutants, salinity, tidal height, bioenergetics and competition in colonization of oyster reefs by commensal assemblages
… P. simpsoni exhibited a 28d LC50 of 6.97 PSU while E. depressus had a 28d LC50 of 0.19 PSU. Crabs were exposed to four salinities for bioenergetic measurements. Energy expenditure was highest at the lowest salinity and decreased as salinity increased. Scope for growth declined below 17.5 …
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Gulf stream temperature, salinity and transport during the last millennium
… equivalent to a salinity increase of 0.8-1.5 psu. On the Great Bahama Bank, where surface waters are influenced by the North Atlantic subtropical gyre, [delta]18Ow increased by 0.3%o during the last 200 years. Although a portion (-O. 1%o) of this shift may be an artifact of …
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Prokaryotic diversity and ecosystem functioning in hypersaline environment: a metagenomic study of the Cagliari salterns
… saltern: the medium-low salinity pond SCV-1 (57 psu) was classified as eutrophic, with organic carbon stocks far exceeding local microbial processing capacity, while the high-salinity pond SCV-17 (275 psu) showed near-total biopolymeric carbon depletion. Metagenomic analysis characterization …
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Barrier island groundwater dynamics
… during storms. An upper saline plume (20-30 PSU) was observed above fresher (10 PSU) water up to 30 m inland of the dune face, which was the maximum wave runup location. Differences in inland propagation between tidal- and storm-induced groundwater head fluctuations are explained using …
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Barrier Island Groundwater Dynamics
… during storms. An upper saline plume (20-30 PSU) was observed above fresher (10 PSU) water up to 30 m inland of the dune face, which was the maximum wave runup location. Differences in inland propagation between tidal- and storm-induced groundwater head fluctuations are explained using …
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Gulf Stream temperature, salinity and transport during the last millennium
… equivalent to a salinity increase of 0.8-1.5 psu. On the Great Bahama Bank, where smface waters are influenced by the North Atlantic subtropical gyre, δ18Ow increased by 0.3% during the last 200 years. Although a portion (~0.1%) of this shift may be an artifact of anthropogenically-driven …
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Application of electrospun fiber membranes in water purification
… thesis. Membranes of bisphenol-A polysulfone (PSU) and of poly(trimethyl hexamethylene terephthalamide) (PA6(3)T) were electrospun and annealed at a range of temperatures spanning the glass transition temperature of each polymer. The data for applied stress versus solidity of membrane were …
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