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 154 for “"zero-order"”.
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The effect of lattice periodicity on the electronic configuration near a metal surface
… These include the elimination of the singular zero-order Fourier terms of the ion-electron and Hartree potentials which leads to the surface dipole barrier. Also a simple formula is derived for the exchange potential in the zero-order approximation which allows to calculate the exchange …
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Fourier-based optical analysis of a membrane mirror spatial light modulator
… study. Simulation results indicate the use of a zero-order blocking spatial filter when high contrast is prioritized, while a zero-order passing spatial filter provides enhanced uniformity of arrays of many pixels. Key engineering rules of thumb and a sample design flow are provided for the …
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New full wave theory for plane wave scattering by a rough dielectric surface - the fictitious current method
… This new theory begins by postulating a zero-order field solution which does not satisfy Maxwell's source-free field equations. The zero-order field, however, is made to satisfy Maxwell's source equations. This is done by introducing a fictitious volume current distribution. Since the …
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Factors affecting compliance: treatment for anemia in pregnant Philippine women
… obtained from a survey, and are analyzed using zero-order correlations and multiple regression techniques. Results of the zero-order correlation analysis show that the socio-demographic and treatment factors have weak relationships with compliance rate. Moreover, among the social-psychological …
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Hot-melt extrusion as processing technique for multiparticulate dosage forms containing lipophilic and hydrophilic polymers
… extrusion) a multiparticulate dosage form with zero-order sustained-release properties. This study demonstrated that the in vitro and in vivo drug release kinetics could be varied by selecting a formulation with an appropriate ratio of lipophilic and hydrophilic polymers, and by changing the …
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Chiral Homoenolate Synthetic Equivalents: Mechanistic, Structural, and Kinetic Investigations
… infrared spectroscopy. The reaction is first order in allylic amine and zero-order in 1:1 base/ligand complex. When the relative concentrations of n-BuLi and (-)-sparteine are not held constant, the reaction exhibits an inverse dependence on n-BuLi concentration. The experimental results are …
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Oxygen diffusion limitations in pancreatic islet culture and immunoisolation
… The difference between Michaelis-Menten and zero-order kinetics and the role of the necrosis process in modeling of oxygen profiles were found to increase with the severity of hypoxia. Internal and external diffusion limitations were characterized for homogeneously dispersed tissue. Oxygen …
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Design and in vitro development of resorbable urologic drug delivery device
… of orifice size in which osmotic-controlled zero-order release was the dominant mechanism of drug delivery from the device. Device stability and function in an alkaline environment of similar pH to that of the SVs and infected prostate gland was also assessed in vitro. The device was found to …
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Biodegradation of benzene in soil systems
… an acclimation period or lag phase, a zero order biodegradation rate and a final time to degrade the substrate to less then 5 ppb benzene concentration. Statistical analysis showed an overall increase in zero order degradation rates with the addition of nutrients in uncontaminated soils …
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Control of flexible spacecraft during a minimum-time maneuver
… the spacecraft regarded as rigid represents the zero-order problem and the control of elastic vibration, as well as of elastic perturbations from the rigid-body maneuver, represents the first-order problem. The zero-order control is to be carried out in minimum time, which implies on-off control. …
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Alcohol use among military personnel: an examination of demographic and sociological determinants
… Variance and Pearson r were used to examine the zero-order relationships among all independent and dependent variables in the study. Multiple Regression and Path Analysis were used to reveal the relationships between demographic and drink-related variables in predicting alcohol use. Findings from …
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Digital Holography and Optical Contouring
… a number of refinements and additions in order to enhance the performance of the method and extend its applicability. The thesis contributes to both the experimental and numerical analysis aspects of digital holography.Regarding experimental work: the thesis includes a comprehensive review …
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A Social Control Based Analysis of the Effect of Community Context upon Self Reported Delinquency Rates.
… to validate each of these key constructs. Zero-order correlations, regression analyses, and path analysis were then used to test the key propositions of these theories. These tests provide full and qualified support for these theories. Implications for future research and criminal justice …
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Bioresorbable Osmotic Pump for Long–term Contraception
… recognized for their capacity to provide near zero-order drug release kinetics coupled with immediate drug release cessation upon completion of osmotic swelling/displacement. In the wet tissue environment, the high osmolality of the osmotic engine causes water flux into the pump through a …
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Advanced Computational Holography for Perceptual Enhancement and Application in HUDs
… 59% for a 5×5 subpixel lattice. Furthermore, the zero-order contribution is analysed and effectively suppressed. In parallel, the kernel shape is investigated to capture the physical characteristics of liquid crystals in LCoS devices, where anisotropy arises from the rubbed alignment layer. The …
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An Evaluation of Systematic Instruction
… hypotheses generally focused on the analysis of zero-order correlations between various instructional components of the Technical Training Center program.
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Finite-strength shock propagation for alternative equations of state
… of the inverse square of the Mach number. The zero-order terms correspond to the self-similar results with the higher-order terms being perturbative corrections accounting for nonself-similar effects. Finally, example calculations are made for several different equations of state.
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Resource Allocation in Seventh-day Adventist Elementary Schools: an Educational Production Function Study
… were used in the analysis of data: (1) zero order correlations, (2) individual stepwise multiple regression, and (3) group stepwise multiple regression. The last two procedures were repeated using the previous achievement status as control variables.</p> <p>Conclusions. Major conclusions …
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Development and Application of a Diligence-Ability Regression Model for Explaining and Predicting Competence Among Juniors and Seniors in Selected Michigan High Schools
… and Spirituality.</p> <p>No significant zero-order correlation was noted between students' diligence and ability scores. A significant zero-order correlation (.54) appeared between students' ability and competence scores and between students' diligence and competence scores (.32). A …
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