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 57 for “"STRESS-DEPENDENT"”.
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Simulation of stress dependent fluid flow in naturally fractured reservoirs
… and fractures, the effect of production-induced stress on fluid flow. Previous works fail to balance sufficient geological complexity and excessive needs of high computational resources. This thesis presents an innovative procedure to simulate stress-dependent fluid flow through discrete fracture …
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Chronic stress-dependent activation of somatostatin neurons in the nucleus accumbens facilitates maladaptive eating behaviors
Stressors are known to impact eating behaviors. However, recapitulating the intricate interplay between chronic stress and aberrant human eating patterns in an animal model remains a challenge. Notably, binge eating, a diagnostic feature associated with many types of eating abnormalities, …
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An experimental investigation into the stress-dependent mechanical behavior of cohesive soil with application to wellbore instability
… on specimens that were K0-consolidated to stress levels ranging from 0.15 to 10.0 MPa in both compression and extension shear modes. Compression tests were also performed on overconsolidated specimens. Model borehole tests make use of two new automated, high pressure Thick-Walled Cylinder …
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Mechanistic Design Concepts for Full-Depth Asphalt Concrete Pavements
… The procedure is based on ILLI-PAVE, a stress dependent finite element computer program, coupled with appropriate transfer functions.
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Mechanistic Interpretation of Nondestructive Pavement Testing Deflections
… of surface deflection measurements. ILLI-PAVE, a stress-dependent finite element pavement model, was used to generate data for developing algorithms and nomographs for deflection basin interpretation.
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Three-Dimensional Finite Element Analysis of Flexible Pavements Considering Nonlinear Pavement Foundation Behavior
… determine accurate pavement responses, such as stress, strain, and deformation. This research has focused on the nonlinear modulus and deformation behavior of pavement foundation geomaterials, i.e., fine-grained subgrade soils and unbound aggregates used in untreated base/subbase layers, due to …
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Analysis and behavior of preexisting landslides
… soils with varying plasticity, effective normal stress, and the applicability of the recovered strength to remedial measures and the back-analysis of landslides. Some of the issues addressed include (a) if the shear strength increases from the residual value with time, (b) what is the maximum …
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Stress- and direction-dependent analysis of elastic and petrophysical properties, and texture in unconventional rocks
… features is an essential mechanism affecting stress- and direction-dependency of elastic and fluid transport properties. Accurately measuring seismic anisotropy and its relationships with petrophysical properties while investigating rock fabric evolution using high-resolution textural images …
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On Cross-Anisotropy of Flexible Pavement Layer Materials for Improved Pavement Responses
… in determining pavement responses, such as stress and strain. The main benefit of the isotropic assumption is that stiffness defined by modulus of elasticity (E-value) is equal in all directions. In reality, stiffness along vertical and horizontal (i.e., and ) may vary due to density …
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Sex Differences and the Role of the Serotonin System in Early Life Stress-Induced Ethanol-Motivated Behaviors in Adulthood
… in males and fail to target the psychological distress underlying alcohol motivation in those assigned female at birth and individuals with adverse childhood experiences who are more apt to drink to relieve negative affective states. The dorsal raphe nucleus (DRN)-serotonin (5-HT) system has an …
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Modeling of crack initiation, propagation and coalescence in rocks
… of a DDM code - FROCK - which currently uses a stress-based criterion proposed by Bobet (1997) to model crack initiation and propagation. Even though the predictions obtained with this criterion generally correspond to the experimental results, there are cases, in which the results obtained with …
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Multifunctional Regulators of Cardiac Disease and Development
… function of MEF2 protein, which is to mediate stress-dependent cardiac remodeling. Mef2d null mice show impaired response to cardiac remodeling stresses such as pressure overload and chronic Β- adrenergic stimulation; hypertrophy, chamber dilation, fibrosis, and fetal gene activation were …
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Time-Lapse Depletion Modeling Sensitivity Study: Gas-Filled Gulf of Mexico Reservoir
… and water movement. Time-lapse modeling, using a stress-dependent rock physics model, helps determine the need and frequency of expensive repeat seismic acquisition. We simulate a Gulf of Mexico gas reservoir time-lapse response for depletion and water flooding using uncertainty ranges in water …
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Functionality of mutant p53 in early tumorigenesis
TP53, encoding a stress-activated transcription factor, is commonly mutated in human cancers. Most of these mutations are missense mutations which, in the presence of WT-p53 (p53mut/+), can cause loss of function (LOF), dominant-negative (DN) and/or gain of function (GOF) activities. However, …
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Problems of fluid flow in a deformable reservoir
… of the model of fluid flow in a formation with stress-dependent permeability. Several typical axi-symmetrical problems of fluid flow in a multi-layered reservoir with account for wellbore storage and skin have been solved numerically. The permeability was assumed to be a function of the vertical …
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Phenomena in the propagation of ultrasonic vibrations in nickel wire
… of anomalous waves, an unexpected effect of stress on the attenuation of ultrasonic waves in annealed nickel wire was observed. Attention was transferred to the new phenomenon, and extensive experimental work carried out to measure the effects of direct and flexural stress on the attenuation. …
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Stress-mediated reaction pathways for dislocation nucleation in copper
… in the framework of transition state theory as a stress-mediated, thermally activated process. We have used reaction pathway sampling methods and well-fit empirical potentials to determine the stress-dependent behavior of and atomistic mechanisms for dislocation nucleation at stresses much lower …
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Post-translational phosphorylation dynamics in Arabidopsis and Physcomitrella
… suppress the near-sterile phenotype of a calcium-dependent protein kinase in Arabidopsis pollen, providing the first genetic connection between a calcium kinase and the secretory pathway. Lastly, Chapter Five utilizes quantitative phospho-proteomics to identify two proteins with …
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Drained shear strength of stiff clays for slope stability analyses
… empirical relationships that describe the stress-dependent nature of the residual and fully softened shear strengths in terms of soil index properties. To investigate the drained residual strength, a Bromhead ring shear apparatus was modified to allow testing of overconsolidated, …
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Molecular Mechanisms Involved in Interleukin-1β Release by Macrophages Exposed to Metal Ions from Implantable Biomaterials
… these ions are known to induce oxidative stress, and inflammasome priming is known to involve nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling. However, the mechanisms of inflammasome activation by metal ions remain largely unknown. The objectives of this …
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