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 18 of 18 for “"initiation time"”.
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An analysis of microbial film fermentor system for production of secondary metabolites
… substrate con- centration and mean residence time were found to be 20 (g glucose/liter) and 10 (hours), respectively. Production phase could be extended by increasing the substrate concentration in the feed stream, but the optimum increasing rate and initiation time of increase are functions …
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The effect of nitrogen content on the susceptibility to stress-corrosion cracking of type 20Cr-20Ni and AISI type 310 stainless steels
… type 20Cr-20Ni alloys even after long exposure times. At the same time, increase in nitrogen content decreased the crack initiation time in type 310 stainless steel and increased the depth of penetration. Furthermore, the rate of propagation of the stress-corrosion cracks in the U-bend stainless …
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Modeling End-User Behavior In Data Networks
… number of bytes or number of packets per unit time traveling through a network node is approximately Gaussian, despite previous theoretical results say it may also be stable L´ vy. The second and third problems study four key session e features: size or number of bytes transmitted, duration, …
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Mode I Delamination Fracture Characterization of Polymeric Composites under Elevated Temperature
… (PMC). Accurate prediction of delamination initiation and propagation is important for the design and analysis of robust composite structures. Existing experimental methodologies that are based on linear elastic fracture mechanics are inadequate to characterize delamination fracture …
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Production and Flow Cytometric Identification of Triploid Walleyes
… between years; either the water temperature, initiation time, or the duration of the heat shock were varied. In 1987, three replicates of four treatments were conducted: 3SoC-10 min after fertilization (MAF)-1. 0 min, 3SoC-10 MAF-2.0 min, 400C-10 MAF-1.5 min, and 120C-10 MAF-1.5 min (control …
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Optimizing the Toehold-Mediated Strand Displacement Reaction on the Nanoparticle Surface by Altering the Surface DNA Density for the Design of a microRNA NanoOptical Sensor
… target nucleic acid. A dramatic decrease in the initiation time and increase in the rate of disassembly are achieved by optimizing the surface density. Our work provides insight into the strand-displacement reaction on nanoparticle surfaces that underpins various sensing and DNA-driven …
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Processing of Aluminum Alloys Containing Displacement Reaction Products
… Exponential relationships developed between the initiation time of the reaction and the mechanical alloying charge ratio. The exponential relationships were the result of changes in the intensity and quantity of collisions occurring during mechanical alloying. Differential thermal analysis of the …
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Newborn Kangaroo Care Immediately after Cesarean Birth
… room. SSC after cesarean decreases breastfeeding initiation time, increase the rates of breastfeeding duration and exclusivity, enhance infant feeding responses (Conroy & Cottrell, 2015). An estimate that the United States would save $13 billion annually if 90% of infants were exclusively breast …
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Performance Evaluation of ionic Liquids in Enhanced Oil Recovery Using Numerical Simulation
… and field studies are relatively expensive and time consuming, a numerical simulation study using CMG-STARS simulator was utilized to explore the efficiency of employing 1-Ethyl-3-Methyl-Imidazolium Acetate ([EMIM][Ac]) and 1-Benzyl-3- methlimidazolium chloride ([BenzMIM][Cl]) with respect to …
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The effects of sexual trauma, intimate partner violence (IPV) and mental health on early versus late antiretroviral therapy (ART) initiation amongst women in South Africa
… sexual trauma and mental health variables on ART initiation times. METHODS This study used data from participants screening into a larger RCT of an intervention for 16 sexual trauma in women living with HIV (WLWH). This study incorporated a cross-sectional data analytic design. Electronically …
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MECHANISTIC STUDY OF CRACK INITIATION AND PROPAGATION IN CROSSLINKED ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENES (UHMWPE) SUBJECTED TO STATIC AND CYCLIC LOADING
… static mode rather than in a cyclic mode. Crack initiation from a notch under fatigue conditions is also investigated for remelted 100 kGy material and compared to crack initiation under constant loading conditions. Crack initiation times for fatigue loading conditions were found to be …
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Timing of Therapeutic Hypothermia & Short-Term Infant Outcomes
… Examine TH timing (TH initiation time & time to target temperature) on short-term outcomes (neonatal seizure; brain injury) of infants >35weeks, with suspected HIE, born at a large urban women’s medical center.</p> <p><strong>Methodology:</strong> Retrospective, …
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Computational Simulation of Chloride-Induced Corrosion Damage in Prestressed Concrete Bridge Girders
… the evolution of chloride content with time. The multi-physics simulation scheme is further refined to account for the corrosion-induced mechanical damage (cracking), by incorporating a phenomenological description of the electrochemical reaction kinetics, generation of expansive …
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Pengaruh perlakuan beberapa konsentrasi 2,4-D yang dikombinasikan dengan air kelapa terhadap pertumbuhan dan kandungan klorofil kalus alfalfa (Mediago sativa L.) pada Media MS
… because they contain chlorophyll is four times greater than other vegetable crops. Duplication of these plants are still experiencing barriers among them, because it doesn’t contain the embryo. These problems can be corrected by using tissue culture techniques, one of them is kalus …
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Processing and Reliability Assessment of Solder Joint Interconnection for Power Chips
… failure process consists of three phases: crack initiation, crack propagation and catastrophic failure. Solder joint geometry, underfilling and substrate flexibility were proved to affect solder joint reliability. The effects of solder joint shape and standoff height on reliability have been …
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Multi-scale modeling of nanosecond plasma assisted combustion
… and electron impact dynamics in sub-ns timescales, as well as calculating the cumulative effects of multiple discharge pulses over ms timescales. Detailed chemistry mechanisms are incorporated to provide deep insight into the plasma kinetic pathways. The modeling framework is utilized to …
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Prevalence of pregnancy and postpartum hypertension in obese women living with HIV In Cape Town, South Africa
… Index (BMI) and antiretroviral therapy (ART) initiation time. Women who were included in the study were those who were on ART before pregnancy (preconception) and those who initiated ART during pregnancy (post conception). Other risk factors associated with PIH and PPH were also determined. …
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Modelización del deterioro de tableros de puentes de hormigón por difusión de cloruros y corrosión de la armadura pasiva
… phases traditionally adopted in the literature: initiation stage, until aggressive species concentration around the reinforcement bar reaches a threshold value, necessary to trigger active corrosion; and propagation stage, in which rust generation induces tensile stresses in the concrete cover. …