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 22 for “"effective size"”.
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The assessment of light sources
… It was not known whether to define it as an effective solid angle, ros or area, As. Two hypotheses were put forward concerning the effective size of a small source: Hypothesis # 1 ('constant omega' hypothesis) The effective size of a small source has a solid angle, ros. Any source with an …
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Response to S1 recurrent selection and estimation of genetic parameters in effective population sizes of the BS11 maize population
… modes of gene action and their frequencies in effective population sizes. We studied four effective population sizes with the objectives: (1) to estimate response to selection and inbreeding effects, (2) to partition the response to selection into that due to additive and dominance genetic …
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Reaction of meta-diisopropylbenzene on acid molecular sieves and synthesis of zeolites by a vapor phase transport method
… as a new test reaction to characterize the effective size of the voids in larger pore (12 T-atom rings or above) molecular sieves by measuring the amount ratio of formed 1,3,5- to 1,2,4-triisopropylbenzene. In most cases, this ratio increases with the increasing effective void size of the …
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Egocentric networks of adolescents with and without disabilities across academic tracks: conditions and impact on communication technology use and formal and informal social activity
… structural characteristics (i.e., network size, density, effective size, and efficiency) across academics tracks and the influence of personal characteristics on ego networks and social activity were examined. Results indicated significant differences in ego network structural …
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Spatial Resolution Analysis of a Variable Resolution X-ray Cone-beam Computed Tomography System
… resolution CT images for objects of different sizes. The new system, called Variable Resolution X-ray Cone-beam CT (VRX-CBCT) uses a CsI-based amorphous silicon flat panel detector (FPD) that can tilt about its horizontal (<em>u</em>) axis and vertical (<em>v</em>) axis independently. The …
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High current ion emission in electrohydrodynamic spraying
… also reported. The experiments confirm the large effective size of the emitting area predicted by the space charge calculations, and imply that it is caused by the movement of a small emitting tip over a much larger area. The experimental evidence also indicates that ion emission may occur by …
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Temporal Comparisons on the Genetic Variation of the Dusky Gopher Frog (Lithobates sevosus)
… exists in isolation with an estimated population size of 100-200 individuals, and previous research has shown that low genetic variability exists as a consequence of isolation and population size reduction. However, the temporal changes in genetic variation are not known. Therefore, my objectives …
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Development of a Genetic Monitoring Program for Stock Enhancement of Mississippi Spotted Seatrout (<i>Cynoscion nebulosus</i>)
… distance between populations. Contemporaneous effective population size estimates were larger in Mississippi and Louisiana than in Florida suggesting that population density and/or dispersal may be greater in the western part of the sampled range. Further characterization of dispersal and local …
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Development and biophysical characterization of a hyaluronic acid – vitamin E conjugate as a subcutaneous delivery platform
… the optimum HAtoco demonstrated its polydisperse effective size, stable colloidal and chemical stability and continued biodegradability by the endogenous enzyme hyaluronidase. In addition, HAtoco has shown the ability to double the in vitro release half-life of three model proteins (BSA, RNase, …
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Mechanical Properties of Individual Molecules : An Interface between the Structure and the Function of the Molecules
… A diffusion based model was used to estimate the effective size of the molecular binding center from the average reaction time. The size of the molecular binding center as determined by our method is in good agreement with the size of an individual Bovine Serum Albumin molecule. The lateral …
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High-Density Discrete Passive EMI Filter Design for Dc-Fed Motor Drives
… recognize the possible solutions to minimize the size of the whole filter. It turns out that the CM choke and DM capacitors are the two main downsides to achieve a small EMI filter. Therefore, ideas are proposed to improve the CM choke by using other type of material such as nano crystalline core, …
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Partial Radiative Recombination Cross Sections for Excited States of Hydrogen
… into highly excited states and the "effective size" of the atom is not much less than the wavelength of the emitted photon. These physical conditions do not meet the requirements for making the dipole approximation. A higher order approximation is to keep an additional term in the …
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Molecular ecology of hawksbill turtles Eretmochelys imbricata in the Seychelles
… more dispersive than females. I found that the effective size of the population was relatively large, and did not show signs of inbreeding or loss of genetic variation following the substantial reduction in hawksbill numbers caused by historic overhunting. Finally, I found that both male genetic …
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Three essays in the economics of information technology
… technology. The hypothesis is that IT increases "effective size" of the firm that a top manager controls and thus her marginal productivity. In turn, in an efficient market, the firms with a higher degree of information technology will reward their CEOs with a higher compensation. The third …
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Dysphagia and recurrent laryngeal nerve injury in anterior cervical discectomy and fusion
… cervical discectomy and fusion (ACDF) is an effective option. It is not well established what factors contribute to dysphagia and recurrent laryngeal nerve palsy complications following ACDF surgery. Objective: 1. To determine the rates of dysphagia and recurrent laryngeal nerve complications …
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Silica Dispersion for Applications in Rubber Processing
… in liquid infiltration along with the effective size of the geometric unit that governs infiltration kinetics. This provides the quantitative information for interpreting effects of silica microstructure on liquid infiltration behavior during dispersion.We developed a new …
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Essays on Information Technologies, Social Networks and Individual Economic Outcomes
… makes firms bigger. Second, it increases their effective size (the size effectively affected by CEO decisions). Third, it increases mobility of CEOs, possibly because managing IT-intensive companies requires relatively more general skills. The third paper is the first to match, at the individual …
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Characterization of polymeric membranes: sulfonated polysulfones
… on the nature of the electrolyte system. The effective size of the ion-conducting channels seemed to increase with higher degrees of sulfonation, probably due to a swelling process. SEM photomicrographs were taken to study membrane morphology and, in some cases, performance as a reverse …
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Method development and application for measuring representative & potential denitrification rates during wastewater reclamation in soil treatment units
… respectively (% weight). This fine sand had an effective size (D10) of 0.12 mm, a uniformity coefficient of 2.3, a pH of 5 and a fraction of organic carbon ranging from 0 - 0.05 (% weight). All four soil columns were dosed two times per day at a hydraulic loading rate of 2 cm/d. Half of the …
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Development and Testing of a Mobile Pilot Plant for the Advancement and Scale-up of the Hydrophobic-Hydrophilic Separation Process
… HHS process is extremely efficient, having no effective size limitation. The purpose of this research was to continue the development and improvement of the HHS process, through the design, construction, and testing of a mobile pilot plant. The pilot plant would in turn be used to demonstrate …
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