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 27 for “"absorption efficiency"”.
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Enhancement of Light Absorption Efficiency of Solar Cell Using Dual
… The Triangular grating achieved higher light absorption compared to rectangular grating. The best top grating was around 200nm grating period. We realized solar cell efficiency improvement about 42.4% for the triangular rectangular (top-bottom) grating.</p> <p>We studied the light transmitted …
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A STUDY OF OPTICAL, PHYSICAL AND CHEMICAL PROPERTIES OF AEROSOLS USING IN SITU MEASUREMENTS
… for aerosol mass concentration and aerosol absorption efficiency; selected filters were analyzed for chemical composition. For fine mode aerosols measured during the Xianghe 2005 IOC, the average spectral absorption efficiency equates well to a &lamda;-1 model, while the coarse mode shows a …
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Nitrogen utilization in creeping bentgrass
… approaches for screening nitrogen utilization efficiency (NUE) of turfgrasses are needed, since nitrate contamination of ground water is a concern on golf courses. In the first study, the conditions of N utilization of fourteen bentgrass cultivars were compared in hydroponic solution culture. …
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MECHANISMS OF INTESTINAL CHOLESTEROL ABSORPTION AND TRANSPORT IN MOUSE THORACIC LYMPH DUCT LIPOPROTEINS
… cholesterol esterification increases cholesterol absorption efficiency by providing the cholesterol esters (CE) for incorporation into chylomicrons and that G5/G8 limits both phytosterol and cholesterol absorption by reducing substrate availability for ACAT2 esterification.
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An energy budget for the South African abalone Haliotis Midae
… with diet and section 2 the consumption rate, absorption efficiency, respiration rate and rate of ammonia excretion, each of which were measured as functions of wet body mass. Each aspect was studied using animals from two sites subject to different temperature regimes. One of these was on the …
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Impact of grain boundary character on the radiation-induced segregation morphology in proton-irradiated 316L austenitic stainless steel
… boundaries and their corresponding point defect absorption efficiency remain unaffected by the accumulation of radiation damage. This is most relevant to coherent 3 twin boundaries, which are assumed to be poor point defect sinks owing to their well-ordered local structure, and therefore free of …
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Structural Optimization of Thin Walled Tubular Structure for Crashworthiness
… components in which maximizing the energy absorption or minimizing the intrusion is the main concern. However, there are some other components in a vehicle structure that should have characteristics of both stiffness and flexibility. Moreover, the load paths within the structure and …
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Photothermal energy conversion by plasmonic nanoparticles
… compare three nanoparticle species' theoretical absorption efficiency from electromagnetic calculations with their photothermal transduction efficiency from measurements of temperature in an illuminated system. Several mechanisms that may account for differences between the two efficiencies are …
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A Comparative Study of Composted Organic Wastes and IBDU Fertilizer in Nitrogen Utilization by Bentgrass Cultivars
… waste materials do provide comparable nitrogen absorption efficiency in relation to an organic slow release fertilizer. Western's compost facility supplied the two different organic wastes, which had been composted for 1 year. The materials used were composted urban leaf litter, sawdust/manure …
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Solar energy collection using vee-grooved surfaces
The thesis presented is a study of the absorption characteristics of diffusely and specularly reflecting V-grooved surfaces. Concepts are developed for the so-called "apparent" absorptance of a V-groove cavity, as well as for the "effective" absorptance of a V-grooved surface. These concepts are …
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Additively Manufactured Metallic Cellular Materials for Blast and Impact Mitigation
… metallic square honeycomb in terms of energy absorption efficiency in the intermediate impact velocity regime (approximately 100 m/s). In this regime, the collapse is dominated by dynamic buckling effects, but wave propagation effects have yet to become pronounced. By tailoring the fold angles …
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Thermal-fluid characterization and performance enhancement of direct absorption molten salt solar receivers
… an in-depth thermal-fluid analysis of direct absorption molten salt solar receivers. In this receiver concept, an open tank of semi-transparent liquid is directly irradiated with concentrated sunlight, where it is absorbed volumetrically and produces internal heat generation. The intensity …
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An Assessment of Suitable Feed Quantity and Quality for Riffleshell Mussels (Epioblasma spp.) Held in Captivity
… in the most feed absorbed per hour (net absorption rate, mg/h) was determined to be the optimum feed ration. Mussels absorbed the greatest amount of food when fed the highest ration. Suggested feed rations for captive adult Epioblasma species are 1.73 mg/l when held at moderate …
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Preparation, Characterization, and Evaluation of Photocatalytic Properties of a Novel NaNbO3/Bi2WO6 Heterostructure Photocatalyst for Water Treatment
… water decontamination. However, due to low light absorption efficiencies and severe electron-hole recombination, modifications on semiconductor structures are required in order to enhance their photocatalytic performance. Heterogeneous photocatalyst composites, taking advantage of the improved …
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Extreme electromagnetic phenomena over an ultrathin platform
… harvesting and broadband, omnidirectional light absorption have been performed. By abnormally guiding the light through a single metasurface, one can achieve the increased absorption efficiency under an absorptive layer by orders of magnitude. Also, by utilizing the Brewster effect, metasurfaces …
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A Comparison Study of Carbon Dioxide Absorption Performance in MEA and Blended Amine Solvents for Post-combustion Process: Experiment, Modeling and Simulation
… single amine solvents for the CO2 chemical absorption process for improving absorption performance and reducing the investment and operating costs. In this research, the CO2 absorption performance of aqueous MDEA/PZ blends and aqueous MEA/MDEA/PZ blends were comprehensively investigated …
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Exploring the absorption properties and direct radiative impact of atmospheric carbonaceous aerosols
… the direct radiative effect (DRE), the absorption from carbonaceous aerosols, including black carbon (BC) and brown carbon (BrC, a component of organic aerosol, OA), are highly uncertain. This thesis addresses this uncertainty by combining models and observations to better constrain the …
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Fabrication and Characterization of ZnO/CuO Core-Shell Nanowire Arrays
… core-shell nanowire arrays have exhibited better absorption efficiency in visible region as compared to the pure ZnO nanowire arrays, which suggests that ZnO/CuO core-shell nanowire arrays have strong potential as nanoscale building blocks in solar cells and light emission devices.</p> <p>In this …
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The bioavailability of folic acid in pectin - coated fortified rice in humans using stable isotope techniques
… may entrap or bind added folate, decreasing its absorption efficiency. Healthy volunteers (n=26, 18-39 yrs) received oral 400μg [13C5]PteGlu doses in three separate test meals in randomized cross-over trials as follows: 1) aqueous 2) 200g white rice and 3) 200g of pectin-coated rice premix. A …
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In vivo and modeling approaches to improve prediction of phosphorus availability in ruminants
… necessitates understanding of P digestion and absorption mechanism in ruminants. Greater knowledge of the interaction of P with other nutrients and the utilization of dietary P in the digestive tract will improve our ability to optimize P feeding and reduce P runoff in agricultural areas. In …
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