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 32 for “"Hac"”.
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Evaluation of pressor sentivity to norepinephrine infusion in dogs with iatrogenic hyperadrenocorticism
… induction of iatrogenic hyperadrenocorticism (I-HAC) by serial arterial blood pressure measurements during infusions of increasing dose rates of norepinephrine. Animals: Eight dogs with I-HAC induced by administration of oral hydrocortisone at a mean dose of 3.3 mg/kg PO TID for 42-49 days and 8 …
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A parametric investigation on the influence and inhibition performance on CO2 corrosion of carbon steel
… the MEG need to be separated from acetic acid (HAc) and acid gases which enhances corrosion of mild steel in the oil field environment. Mono-Ethylene glycol and acetic acid also has an adverse effect of lowering the solubility of mineral salts and causing a higher risk of corrosion problem. The …
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Nonlinear Dynamics and Vibration of Gear and Bearing Systems using A Finite Element/Contact Mechanics Model and A Hybrid Analytical-Computational Model
… model. A hybrid analytical-computational (HAC) model is proposed for nonlinear gear dynamics. The HAC predictions are compared with FE/CM results and available experimental data for validation. Chapter 2 investigates the static and dynamic tooth root strains in spur gear pairs using a …
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Avoiding Hospital-Acquired Conditions: A Qualitative Analysis of Early Top Performers
… for specific hospital-acquired conditions (HAC) coined as Never Events. To date, studies have focused on quantifying incidence of specific HAC and assessing policy impact without correlating findings to actual outcome performance. The purpose of this study was to develop an understanding of …
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Modelling interdependence in a pair of heating oil and natural gas futures curves
… models based on hierarchical Archimedian copula (HAC-DCC). The conducted analysis allowed to forecast the distribution of the returns of any portfolios composed of the available futures contracts for short time periods. As shown in the study, value-at-risk estimates derived from the forecasts …
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ParChain: A Framework for Parallel Hierarchical Agglomerative Clustering using Nearest-Neighbor Chain
… parallel hierarchical agglomerative clustering (HAC) algorithms, and using the framework we obtain novel parallel algorithms for the complete linkage, average linkage, and Ward’s linkage criteria. Compared to most previous parallel HAC algorithms, which require quadratic memory, our new …
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Estudio sobre la aplicabilidad de los modelos de cálculo de la fluencia y retracción al hormigón autocompactable
El hormigón autocompactable, HAC, aunque se fabrica con los mismos componentes que el hormigón convencional vibrado, posee una clara diferencia en la composición final de la mezcla. En comparación con el hormigón convencional, el HAC tiene un alto volumen de adiciones, mayor volumen de pasta, mayor …
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Modelling of vector MEM with hierarchical Archimedean copula
… auf einer hierarchisch Archimedischen Copula (HAC), in einem zweistufigen Verfahren zu schätzen: MEMs werden an die eindimensionalen Prozesse kalibriert um die Residuen zu erhalten, deren Abhängigkeiten durch eine HAC geschätzt werden. Die empirische Analyse unterstützt die Hypothese von …
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On Sequence Clustering and Supervised Dimensionality Reduction
… and hierarchical agglomerative clustering (HAC) algorithms. Data sequences are generated from unknown continuous distributions that are assumed to form clusters according to some well-defined distance metrics. The goal is to group data sequences according to their underlying distributions …
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Ensayos de información y extracción de probetas testigo en hormigones autocompactantes
… especialmente en el hormigón autocompactante —HAC—.En línea con lo apuntado, la presente tesis doctoral tiene como objetivo principal verificar si el comportamiento de estos ensayos aplicados a un HAC es similar al mostrado en el HVT. Esta investigación se centra principalmente en la predicción …
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Characterization of three Drosophila melanogaster regulators of programmed cell death that lead to caspase activation
… Drosophila ced-4/Apaf-l homolog, which we named hac-1. HAC-1, like CED-4 and Apaf-1 is required for some cell deaths during development, can help activate caspases in vitro, and appears to aid in the activation of procaspases overexpressed in the Drosophila eye. Interestingly, like reaper, hac-1 …
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Visualisation of Mental Health Community Service Patient Pathways
… including Hierarchical Agglomerative Clustering (HAC), DBSCAN, and K-Medoids, were applied to both vectorial and syntactical representations of patient pathways. The results indicate that HAC, with a vectorial representation, was the most effective approach, followed by DBSCAN, while K-Medoids and …
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Spatial Dimensions of Economic Valuation: A Comparison of Hedonic Models
Using the recently developed HAC estimator, this dissertation provides a better sense of the precision of the estimates of the MWTP form alternative models. Aggregate benefits for the SCAB region from a 0.1 ppb reduction in OZ levels add up to about 8 billion dollars if multiplier effects are taken …
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An RNA-interference-based platform for genome analysis and engineering in Saccharomyces cerevisiae
… RAGE was applied to improve acetic acid (HAc) tolerance of S. cerevisiae. After three rounds, the 100% growth inhibition concentration of HAc was elevated from 0.7% to 0.9% (v/v). The best engineered strain exhibited a significantly improved fermentation performance than the wild type …
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Volatile fatty acid production during thermophilic aerobic digestion pre-treatment
… with increasing retention time from 0.029 mg HAc/mg VS$\cdot$d at 6 hours to 0.057 mg HAc/mg VS$\cdot$d at 24 hours. VFAs were consumed under the oxygen-satisfied condition (O$\sb2$ flow rate: 0.14 $\rm m\sp3/m\sp3\cdot h;$ ORP: $-$10 mV to $-$225 mV). The VFA specific production rate did not …
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Purification of an acidic recombinant protein from transgenic tobacco
… by a step of hydroxyapatite chromatography (HAC). The HIC step served to remove PEI and other contaminants such as nucleic acids that were accumulated during the precipitation step, while the HAC step served to separate rGUS from the remaining native tobacco proteins, most notably ribulose …
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Finding important entities in continuous streaming data
… novel online algorithm for heavy hitters, called HAC, which addresses problems in continuous space, and demonstrate its effectiveness on real video and household domains.
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A Hybrid Approach to the Sentiment Analysis Problem at the Sentence Level
… with the Hybrid Advanced Classification (HAC) method that computes the polarity intensity of opinions/sentiments. Step 3: in closing, we present two methods that produce a semantic-specific aggregation of two or more classification methods, as a complement to the HSC/HAC methods when the …
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Stress corrosion cracking and hydrogen embrittlement of thick section high strength low alloy steel
… were susceptible to hydrogen assisted cracking(HAC) in a seawater environment under conditions of continuous plastic deformation and triaxial stress in the presence of hydrogen. The heat-affected zone of the weldment was found to be the most susceptible portion of the weld joint. A lower bound …
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Microstructure Optimization to Prevent Hydrogen-Induced Cracking of API X70 Pipeline Steels in Sour Environments
… cracking (SCC) and hydrogen assistant cracking (HAC). Hydrogen-induced cracking (HIC) is the main cause of pipeline steels failure in sour environments, which is categorized as a type of HAC. In this type of failure, hydrogen atoms accumulate in the steel and cause cracking by different …
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