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Dissertations / Theses on the topic 'End clearance'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Ozer, Ahmet. "Increased Bacterial Adherence and Decreased Bacterial Clearance in Urinary Tract Infections with Diabetes Mellitus." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1376406476.

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2

Калініченко, Павло Михайлович, Павел Михайлович Калиниченко, Pavlo Mykhailovych Kalinichenko та О. В. Орел. "Рациональное использование силы трения торцовой пары гидростатического уплотнения". Thesis, Сумский государственный университет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40518.

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3

Лісовенко, Дмитро Володимирович, Дмитрий Владимирович Лисовенко, Dmytro Volodymyrovych Lisovenko, Андрій Васильович Загорулько, Андрей Васильевич Загорулько та Andrii Vasylovych Zahorulko. "Экспериментальное исследование торцовых затворных импульсных уплотнений". Thesis, Сумский государственный университет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40580.

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4

Карпова, В. О. "Розрахунок статичних характеристик гідростатичних ущільнень із саморегульованим зазором". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40335.

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Розглянуті гідростатичні ущільнення котрі забезпечують надійну роботу у широкому діапазоні тисків і частот обертання. Ущільнення являють собою систему автоматичного регулювання торцевого зазору і витоків ущільнюваної рідини і осьової рівноваги рухомого кільця побудовані статичні характеристики : залежність торцевого зазору і витоків від тиску ущільнюваної рідини.

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5

Таран, Г. І. "Аналіз динаміки аксіально-рухомого кільця гідростатичного ущільнення із саморегулювальним зазором". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40387.

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6

Wilcock, Donna Marie. "Mechanisms of ß-Amyloid Clearance by Anti-Aß Antibody Therapy." Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/1301.

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Alzheimers disease (AD) is defined as a progressive neurodegenerative disorder that gradually destroys a persons memory and ability to learn. There are three pathological hallmarks of the disease which are necessary for diagnosis of AD, these are; extracellular amyloid plaques composed of [beta]-amyloid (A[beta]) protein, intracellular neurofibrillary tangles and neuronal loss. Amyloid plaques exist as both compact deposits which stain with Congo red and more numerous diffuse deposits. Active immunization against A[beta] 1-42 or passive immunization with monoclonal anti-A[beta] antibodies redu

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7

Zhang, Da. "Evaluation of the Allometric Exponents in Prediction of Human Drug Clearance." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3533.

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Background. Allometric scaling (AS) is widely used in predicting human clearance (CL) based on animal data. Substantial prediction errors have been commonly observed and various modifications to AS have not provided a broad reliable improvement. In this study, an extensive data set was assembled including animal and human systemic CL and physiochemical properties. The allometric exponents were calculated based on multiple species AS and single-species AS methods. The correlations between the allometic exponents and physiochemical properties were evaluated in an attempt to find covariates that

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8

Wilcock, Donna Marie. "Mechanisms of [beta]-amyloid clearance by anti-a[beta] antibody therapy." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0001169.

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9

Mitchell, Steven. "HEURISTIC PRIORITIZATION OF EMERGENCY EVACUATION STAGING TO REDUCE CLEARANCE TIME." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4433.

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A region's evacuation strategy encompasses a variety of areas and needs. Primary among these is the minimization of total evacuation time, represented in models as the clearance time estimate (CTE). A generic testbed simulation network model was developed. An input/output (I/O) analysis was performed to establish a theoretical baseline CTE. Results were compared with simulations; analysis showed that the I/O method underestimated simulated CTE as a function of network size, with a correction factor range of 1.09 to 1.19. A regression model was developed for the generic network. Predictors were

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10

Desai, Ushang Prakshbhai. "Use of Spirometry for Medical Clearance and Surveillance in Occupations Requiring Respirator Use." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5933.

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Medical certification of workers for respirator use is an important activity of occupational medicine health professionals. Spirometry is a diagnostic tool to evaluate respiratory distress/insufficiency that may affect respirator use. In this study, we analyzed the pulmonary function data of 337 workers from different occupations which required medical evaluation to wear a respirator. The American Thoracic Society and National Fire Protection Association criteria were used to evaluate employees. Of 337 workers who were cleared for respiratory use on the basis of medical questionnaires for resp

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11

Ferreira, Adriano Domingos. "Simulação do escoamento bifásico da mistura óleo-refrigerante através da folga radial de compressores rotativos de pistão rolante /." Ilha Solteira : [s.n.], 2006. http://hdl.handle.net/11449/88881.

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Orientador: José Luiz Gasche<br>Banca: André Luiz Seixlack<br>Banca: Paulo Eduardo Lopes Barbieri<br>Resumo: Devido à solubilidade mútua entre o fluido refrigerante e o fluido lubrificante usados em sistemas de refrigeração por compressão de vapor, eles formam uma mistura homogênea que influencia tanto os processos de transferência de calor no evaporador e no condensador, como os processos de lubrificação e de selagem de vazamentos no interior do compressor. O vazamento de refrigerante através da folga radial de compressores rotativos de pistão rolante é de particular importância para o bom de

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12

Proença, Mahara-Daian Garcia Lemes. "Transporte mucociliar e atividade física na vida diária de fumantes saudáveis /." Presidente Prudente : [s.n.], 2010. http://hdl.handle.net/11449/87330.

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Orientador: Ercy Mara Cipulo Ramos<br>Banca: Vanessa Suziane Probst<br>Banca: Dionei Ramos<br>Resumo: A eficiência do transporte mucociliar pode variar em diferentes condições, como na exposição a partículas nocivas da fumaça do cigarro. O presente estudo avaliou os efeitos do cigarro, tanto imediato quanto a curto prazo, no transporte mucociliar nasal de fumantes por meio da quantificação do tempo de trânsito da sacarina (TTS), e os correlacionou com a intensidade de consumo tabagístico. Métodos: Dezenove fumantes ativos (11 homens; 51±16 anos; IMC 23±9 kg/m2; 27±11 cigarros/dia; 44±25 anos/m

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13

Ghibellini, Giulia Brouwer Kim L. R. "In vivo and in vitro methods to determine biliary clearance of drugs in humans." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,282.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2006.<br>Title from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the School of Pharmacy." Discipline: Pharmacy; Department/School: Pharmacy.

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14

Moorthy, Vidya. "Effect of Combined Oral Contraceptives on Insulin Clearance in Lean and Obese Pre-menopausal Women." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2572.

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Introduction: Obese women are predisposed to greater risks of insulin resistance and compensatory hyperinsulinemia. Likewise, African-Americans, appear to be inherently insulin resistant and hyperinsulinemic even after controlling for obesity. Hyperinsulinemia has been attributed to insulin resistance and a compensatory insulin hyper-secretion by the pancreas, as well as decreased insulin clearance, notably in obesity. Pharmacological agents that may worsen insulin resistance/hyperinsulinemia in obese women is of clinical relevance. Previous data from our group suggested that combined oral con

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15

Hadfield, Mitchell Gregory. "Analysis of Performance Measures of Traffic Incident Management in Utah." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8529.

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In 2009 the Federal Highway Administration published a report regarding a Focus States Initiative that had been conducted with 11 states to discuss the development of national Traffic Incident Management (TIM) standards. Performance measures were defined, and a national TIM dashboard created, but very little data has been added to the dashboard since. In this research study, performance measures of the Utah Department of Transportation (UDOT) TIM program were analyzed. Data availability was first assessed to determine whether these performance measures could be calculated. It was determined th

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16

Seitz, Heather M. Matsushima Glenn K. "The role of Axl/Mertk/Tyro3 receptor tyrosine kinases in the clearance of apoptotic cells." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,696.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2006.<br>Title from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Doctorate of Philosophy in the Department of Microbiology and Immunology." Discipline: Microbiology and Immunology; Department/School: Medicine.

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17

Beals, Carla Danielle. "Clearance rates and particle selectivity in the hard clam, mercenaria mercenaria, from warm water habitats." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008841.

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18

Bhat, Sundeep Ram. "Lactate Clearance Predicts 28-Day Survival Among Patients with Severe Sepsis and Septic Shock." Yale University, 2009. http://ymtdl.med.yale.edu/theses/available/etd-03182009-143432/.

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Severe sepsis and septic shock comprise a significant number of emergency department (ED) admissions annually. With the advent of early goal directed therapies, early identification and intervention have become paramount in this population. Few studies, however, have examined the role of serum lactate as a predictor of mortality or endpoint to resuscitation among this population. We aimed to show that improved lactate clearance is associated with decreased 28-day in-hospital mortality. We retrospectively examined data from the Yale Sepsis Registry for patients with severe sepsis or septic shoc

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Bennett, Logan Stewart. "Analysis of Benefits of an Expansion to UDOT's Incident Management Program." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/9250.

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In 2018 the Utah Department of Transportation (UDOT) funded a study in which data were collected to evaluate performance measures for UDOT's Incident Management Team (IMT) program. After that study was completed, UDOT received funding to expand the size of its IMT program. Additionally, TransSuite, a data source used by the UDOT Traffic Operations Center to log incident-related data, was reconfigured to provide a higher quantity of performance measure data. This study made use of the new data source, in addition to Computer Aided Dispatch logs provided by the Utah Highway Patrol that were used

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20

Thekkudan, Dennis. "Multidimensional Methods: Applications in Drug-Enzyme Intrinsic Clearance Determination and Comprehensive Two-Dimensional Liquid Chromatography Peak Volume Determination." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/2005.

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The goal of the first project was to evaluate strategies for determining the in vitro intrinsic clearance (CLint) of dextrorphan (DR) as metabolized by the UGT2B7 enzyme to obtain dextrorphan glucuronide (DR-G). A direct injection liquid chromatography-mass spectrometry (LC-MS) method was used to monitor products using the pseudo-first-order (PFO) model. Standard enzymatic incubations were also quantified using LC-MS. These data were fit utilizing both PFO and Michaelis-Menten (MM) models to determine estimates of kinetic parameters. The CLint was determined to be 0.28 (± 0.08) µL/min/mg p

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21

Rynn, Caroline. "Investigations into rat hepatobiliary drug clearance pathways in early drug discovery." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/investigations-into-rat-hepatobiliary-drug-clearance-pathways-in-early-drug-discovery(cea9825c-5b49-4212-a85a-803139dc1ebf).html.

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Conventional ‘well-stirred’ extrapolation methodology using intrinsic metabolic clearance data from rat liver microsomes poorly predicts in vivo clearance for approximately half of drug discovery compounds. The aim of this present study was to gain a more detailed understanding of the hepatobiliary disposition pathways which influence drug clearance. A set of 77 new chemical entities (NCEs), demonstrating a range of physicochemical properties and in vitro-in vivo clearance correlations (IVIVC), were employed to explore relationships between hepatobiliary disposition pathways in rat and physico

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22

Flatin, Heidi Kathryn. "A Study of the Metabolic Clearance Rate and Protein Binding of Corticosterone in Reproductively Inhibited Male Peromyscus maniculatus bairdi." W&M ScholarWorks, 1985. https://scholarworks.wm.edu/etd/1539625300.

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23

Wood, Francesca. "Optimisation of in vitro methodology for drug metabolism studies to improve prediction of hepatic drug clearance." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/optimisation-of-in-vitro-methodology-for-drug-metabolism-studies-to-improve-prediction-of-hepatic-drug-clearance(0786531a-2e10-48a7-9b35-e2e7e1935338).html.

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As a critical parameter in pharmacokinetics, prediction of clearance is an integral aspect of drug discovery programmes. Since the liver is the major site of xenobiotic biotransformation, accurate prediction of hepatic clearance (CLh) is vital. The use of cellular and subcellular in vitro systems for this purpose is common practice; however, prediction accuracy tends to be poor. The aim of this thesis was to explore potential contributing factors to the underprediction of in vivo clearance, specifically with relation to the in vitro methodology of hepatocyte clearance assays, which is largely

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24

Hockley, T. G. "Vegetation succession following the clearance of Rhododendron in the Vale of Ffestiniog." Thesis, Bangor University, 1989. https://research.bangor.ac.uk/portal/en/theses/vegetation-succession-following-the-clearance-of-rhododendron-in-the-vale-of-ffestiniog(97ca4cf8-443e-4b13-abcf-5de9b42e8ca5).html.

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This study analyses vegetation succession following the clearance of Rhododendron in a sessile oakwood in North Wales. The Rhododendron has been cleared since 1984/5 and prior to clearance dominated the understorey. The succession was analysed in relation to the number of years since clearance; method of clearance; density of the former Rhododendron cover, and vegetation adjoining the site. An experiment was undertaken in the University's nursery to assess the presence and viability of seed within the seedbank, and the ability of the soil to support germination. Over 50% of the samples were do

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Lewis, Daniel Joseph. "Tip clearance and angle of attack effects upon the unsteady response of a vibrating flat plate in crossflow /." This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06112009-063924/.

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26

Jimenez, Jeffy Pilar. "Effects of Monoclonal Anti-Abeta Antibodies on the Amyloid Beta Peptide Fibrillogenesis and their Involvement in the Clearance of Alzheimer's Disease Plaques." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3445.

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Alzheimer’s disease (AD) is the most common cause of senile dementia worldwide. AD is a neurodegenerative disorder characterized by the loss of memory and language skill, collapse of the cognitive function, and distortion of social behavior. As of today, the onset mechanisms of AD and cure are unknown; however, three hallmarks are commonly encountered: extra and intracellular accumulation of amyloid beta (A!) peptide plaques, formation of intracellular neurofibrillary tangles, and inevitable neuronal death. Hypothetically, a possible scenario provoking or involved in the onset of AD is a casca

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Garcia, Sara Marie. "Sublethal Effects of Crude Oil and Chemical Dispersant on the Eastern Oyster (Crassostrea virginica) at Multiple Life History Stages." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7624.

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Oil spills in the marine environment can threaten vulnerable ecosystems that support ecologically and economically significant organisms, such as the eastern oyster (Crassostrea virginica), in coastal habitats. The use of chemical dispersant (Corexit 9500) was applied as a cleanup effort in response to the Deepwater Horizon blowout to minimize crude oil slicks, but also resulted in increased concentrations of polycyclic aromatic hydrocarbons in the water column. The effects of increased soluble fractions of crude oil and dispersant components may be harmful to marine organisms. This study aime

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28

Berrett, Jordi Jordan. "Pedestrian Walking Speeds at Signalized Intersections in Utah." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7130.

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The 2009 edition of the Manual on Uniform Traffic Control Devices (MUTCD) recommends a pedestrian walking speed of 3.5 feet per second for use in the timing of pedestrian clearance intervals at signalized intersections (reduced from 4.0 feet per second in the 2003 edition). Jurisdictions across the state of Utah continue to maintain pedestrian walking speeds of 4.0 feet per second for normal intersections with guidance on engineering judgement for areas where a lower pedestrian walking speed should be considered. In 2018, it was decided that the current state guidance with regard to pedestrian

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29

Scotcher, Daniel. "Physiological scaling factors and mechanistic models for prediction of renal clearance from in vitro data." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/physiological-scaling-factors-and-mechanistic-models-for-prediction-of-renal-clearance-from-in-vitro-data(8f550310-1a48-48b5-b1c9-4227134e4af1).html.

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The kidneys have a significant role in drug elimination through both metabolic and excretory routes. Despite a recent paradigm shift towards systems pharmacology approaches, prediction of renal drug disposition using 'bottom-up' and mechanistic modelling approaches remains underdeveloped. Lack of 'gold-standard' in vitro assays and corresponding in vitro-in vivo extrapolation (IVIVE) approaches for prediction of renal metabolic (CLR,met) and excretory (CLR) clearances contribute to this. A comprehensive literature analysis of quantitative physiological data to inform renal IVIVE scaling factor

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Mohan, Hosahalli Krishnamurthy. "Inhaled 99mTc-sestamibi clearance from lungs and its relation to the expression of P-glycoprotein and Multidrug Resistance Protein-1." Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/inhaled-99mtcsestamibi-clearance-from-lungs-and-its-relation-to-the-expression-of-pglycoprotein-and-multidrug-resistance-protein1(d5e7396e-8448-4f5c-ac7c-aaea224987a7).html.

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P-glycoprotein (P-gp) and Multidrug Resistance Protein (MRP1) are the key cellular drug efflux transporters in a range of tissues and the radiopharmaceutical 99mTc-sestamibi has been demonstrated to be a substrate for both transporters in a number of in vivo and in vitro studies. The elimination rate of 99mTc-sestamibi from the lungs following inhalation as an aerosol has been shown to be delayed in healthy smokers versus non-smokers. It was hypothesized that this was the result of smoke-induced up-regulation of P-gp. The aims of this study were: To examine the relationship between the lung el

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31

Allen, Charles G. "Crashes in the Vicinity of Major Crossroads." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2668.pdf.

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Zhang, Lei. "Electrical tracking over solid insulating materials for aerospace applications." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/electrical-tracking-over-solid-insulating-materials-for-aerospace-applications(94086fc5-0ca2-4d12-aa6d-97452d3169d1).html.

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The concept of More Electric Aircraft, where is to utilize the electrical power to drive more or all aircraft subsystem instead of conventional combination of pneumatic, hydraulic, mechanical and electrical power, can be recalled to World War II. It has been proven to have more advantages for decades in terms of energy efficiency, environmental issues, logistics and operational maintenance. It can also enhance aircraft weight, volume and battle damage reconfigurability.Thanks to the new electronics technologies and the emergence of new materials, It becomes feasible for high power density elec

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Haule, Henrick Joseph. "Evaluation of Traffic Incident Timeline to Quantify the Performance of Incident Management Strategies." UNF Digital Commons, 2018. https://digitalcommons.unf.edu/etd/791.

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Transportation agencies are introducing new strategies and techniques that will improve traffic incident management. Apart from other indicators, agencies measure the performance of the strategies by evaluating the incidents timeline. An effective strategy has to reduce the length of the incident timeline. An incident timeline comprises various stages in the incident management procedure, starting when the incident was detected, and ending when there is the recovery of normal traffic conditions. This thesis addresses three issues that are related to the traffic incident timeline and the incide

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Chen, Yi-Shiun, and 陳逸勳. "The Study of Rear-End Collisions at Intersections during Change and Clearance Intervals – Using Driving Simulator." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/54693125204500520107.

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碩士<br>國立成功大學<br>交通管理學系碩博士班<br>94<br>Rear-end accidents were one of common accidents. With different locations, the causes and severity of them would be different. Considering that higher speed resulted in higher risk, previous study often took rear-end accidents on the sections as subjects. But at signalized intersections, the change of signals would interfere in drivers’ decisions. It resulted in higher risk. The study utilized the problems of change interval and the researches of rear-end accidents. To improved the rear-end accidents at signalized intersections, the study analyzed their char

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Kirimanjeswara, Girish Soorappa. "Antibody-mediated clearance of bordetella species." 2005. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-756/index.html.

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36

Park, Sang. "The Effects of the Back Clearance Size and the Balance Holes on the Back Clearance Flow of the Centrifugal Pump with Semi-Open Impeller." 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-89.

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Conventionally the size of the back clearance played a great importance on reducing the axial clearance by utilizing the concept that the decreased axial clearance results in lower axial force acting on the impeller. However, from the previous works on the effect of the back clearance on the hydrodynamic forces upon the semi-open impeller showed the opposite trend: increasing the back clearance results in the reduced axial loading. In this work, the CFD simulation of an entire pump and detailed analysis on the back clearance flow are performed. By utilizing the commercially available software

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Bernard, Jeffrey Richard. "Activation of skeletal muscle glucose uptake by am [i.e. an] amino acid mixture and its impact on glucose tolerance and insulin resistance." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-3749.

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Recent research suggests that amino acids can significantly increase skeletal muscle glucose uptake. However, the mechanism(s) have not been fully elucidated and it is also not clear if the beneficial impact amino acids have on healthy tissue translates to insulin resistant skeletal muscle. Therefore, in this series of studies, the effects of an amino acid mixture on glucose tolerance and insulin resistance were investigated. Study 1 Experiment-1 (Exp-1) demonstrated that an amino acid mixture significantly reduced the blood glucose response to an oral glucose challenge in Sprague Dawley ra

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Dahlberg, Greg John. "Fault clearance in distributed power architectures with limited energy flow through power electronic interfaces." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-05-5550.

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The objective of this thesis is to determine a method for computing the amount of capacitance in a power electronic converter required to melt a fuse in the event of a line to ground fault. DC micro-grids rely on power electronic converters to change voltage levels. All converters rely on semiconductor switches that must be protected from surges of fault current. This limits the power that a converter can supply to a fuse. In many cases, sufficient power may be achieved by appropriately sizing the converters’ output capacitor.<br>text

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Liu, Xiao. "Immune Response and Salmonella Clearance in Broiler Chickens after Fed Arginine, Vitamin E and Prebiotics." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10575.

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Four experiments were conducted to evaluate effects of arginine (ARG), vitamin E (VE) and mannanoligosaccharide (MOS) on immune response and clearance of Salmonella in broiler chickens. There were 4 groups in Exp.1 (E.1) and E.2: antibiotic-free diet (CTL-); diet with antibiotic (CTL+); ARG and VE (AVE); ARG, VE and MOS (AVM). Birds were infected with 10^6 CFU/ml of a novobiocin and nalidixic acid resistant Salmonella enteric Serovar Typhimurium (ST) at d 7 (E.1) or at d 3 (E.2). In E.3 and E.4, there were three groups: CTL, AVE and AVM; at d 3, birds in E.3 were infected with 10^2 CFU/ml ST a

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Van, Ness II Daniel Kraus. "A study of tip clearance flow loss mitigation in a linear turbine cascade using active and passive flow control." 2009. http://etd.nd.edu/ETD-db/theses/available/etd-03192009-154338/.

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Thesis (Ph. D.)--University of Notre Dame, 2009.<br>Thesis directed by Thomas C. Corke for the Department of Aerospace and Mechanical Engineering. "March 2009." Includes bibliographical references (leaves 283-287).

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Sekaran, Aarthi. "Study of Impact of Orbit Path, Whirl Ratio and Clearance on the Flow Field and Rotordynamic Coefficients for a Smooth Annular Seal." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-848.

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The study of the effect of different orbit paths and whirl ratios on the rotordynamic coefficients of a smooth eccentric annular seal, using Computational Fluid Dynamics (CFD) was performed. The flow was simulated for two different orbits - linear and circular for orbit speeds ranging from 0 to 1. This was done using the FLUENT CFD code with a time - dependent solver which allowed the use of dynamic meshing and User Defined Functions (UDFs). The effect of clearance was also studied by simulating the flow through an eccentric seal with one-tenth the clearance and comparing the results. It was s

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Deva, Asirvatham Thanesh. "Friction Factor Measurement, Analysis, and Modeling for Flat-Plates with 12.15 mm Diameter Hole-Pattern, Tested with Air at Different Clearances, Inlet Pressures, and Pressure Ratios." 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8970.

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Abstract:

Friction factor data are important for better prediction of leakage and rotordynamic coefficients of gas annular seals. A flat-plate test rig is used to determine friction factor of hole-pattern/honeycomb flat-plate surfaces representing annular seals. Three flat-plates, having a hole-pattern with hole diameter of 12.15 mm and hole depths of 0.9 mm, 1.9 mm, and 2.9 mm, are tested with air as the working medium. Air flow is produced between two surfaces, one having the hole-pattern roughness representing the hole-pattern seal and the other smooth, at the following three clearances of 0.254, 0.3

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