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 103 for “"low-shear"”.
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Stability of the large low shear velocity provinces
… piles (such as the seismically observed Large Low Shear Velocity Provinces - LLSVPs). Our high-resolution numerical simulations suggest that the longevity of LLSVPs for up to three billion years, and possibly longer, can be ensured by a balance in the rate of segregation of high-density …
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The effects of low-shear modeled microgravity on Streptococcus pneumoniae and adherent-invasive Escherichia coli
The effects of low-shear modeled microgravity (LSMMG) were investigated on Streptococcus pneumoniae global gene expression and on adherent-invasive Escherichia coli (AIEC) physiology and colonization properties. Habitation in space exposes both humans and microbes to microgravity conditions which …
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Red Blood Cell Aggregation Characterization: Quantification and Modeling Implications of Red Blood Cell Aggregation at Low Shear Rates
… bridge together to form aggregates under very low shear rates. The theory and mechanics behind aggregation are, however, not yet completely understood. The purpose of this work is to provide a novel method to analyze, understand and mimic blood behaviour in microcirculation. The main objective …
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The Role of Preexisting Airmass Boundaries in the Maintenance and Rotation of Deep Convection in a High -Cape, Low -Shear Environment
… and therefore consistent with the high-CAPE, low-shear archetype. When both the dryline and cold front were included in the initialization, the overall behavior of the simulated storm complex and boundaries closely resembled the early stages of the 27 May 1997 event. The quasi-continuous …
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The Response of Staphylococcus aureus to Culture in a Low-Fluid-Shear Environment
… aureus, encounters a wide range of fluid shear levels within a human host. As an intestinal colonizer, S. aureus experiences the low-fluid-shear levels consistent with the site; however, as the intestinal presence of the organism is infrequently associated with disease, very few …
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Single wall carbon nanotubes as viscosity modifiers in polypropylene matrix nanocomposites
… wall carbon nanotubes (SWNTs) were studied as low shear rate viscosity modifiers in the polypropylene matrix of nanocomposites. To create nanocomposites which did not demonstrate increased low shear rate viscosity when nanotubes were added into the polymer melt, this work focused on modifying …
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Characterization of the role of precipitation in tropical cyclone intensification
… modes dependent upon environmental wind shear associated with the most extreme intensification events, known as rapid intensification (RI). Here two cloud-resolving simulations are undertaken with the Weather Research and Forecasting (WRF) model to reproduce RI under low (Hurricane Ike, …
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Seismic investigations of the northern Transantarctic Mountains
… images indicate a previously unidentified low shear wave velocity anomaly beneath the northern TAMs, with faster seismic velocities behind the TAMs front. The low shear wave velocity anomaly is interpreted as reflect rift-related decompression melting associated with Cenozoic extension. …
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Shear Thickening In Dense Bidisperse Suspensions By Dynamic Simulation
<p>Shear thickening, which corresponds to an increase of viscosity with shear rate, is ubiquitously observed in many concentrated suspensions and, as such, has implications for many industrial materials and geological phenomena. Controlling shear thickening is of significant importance, and many …
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STRUCTURE, GEOLOGY, AND ENGINEERING PROPERTIES OF TWO CARBONATIC FINE-GRAINED SOILS
… to the high compressibility potential and low shear strength, these sediments are typically characterized by alternating layers of silts and clays as well as high calcium carbonate content. The unique properties of these deposits make them challenging soils for geotechnical engineers. …
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FABRICATION AND CHARACTERIZATION OF CELL-LADEN 3D PRINTED HYBRID SCAFFOLDS FOR ESOPHAGEAL TISSUE REPAIR
… printing on porous scaffold precisely with low shear stress to produce homogeneous cell-laden hybrid scaffold. These results demonstrate the potential of the hybrid 3D scaffold in organized tissue reconstruction for esophagus healing.
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IMPACT OF BIOPHYSICAL CUES ON THE FUNCTIONAL MATURITY OF PLURIPOTENT STEM CELL DERIVED ENDOTHELIAL CELLS INTO ARTERIAL AND VENOUS SUBTYPES
… basement membrane architecture and different shear stress. Thus, this study incorporated a Multi Architectural (MARC) chip to study the effect of substrate topography and a multiplex microfluidic device to study the effect of shear on the functional maturity of PSC-EC into the two EC subtypes. …
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Micromechanics of deformation in polymers modified by inorganic and rubber particles
… structural polymers exhibit brittle behavior at low temperatures and/or high strain rates. It has been shown that the incorporation of rubber and inorganic particles can have significant toughening effects. Previous studies have shown that the particles can alter the matrix morphology at the …
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Study of the rheological properties of nomex fibrids
… for various commercial applications.;The flow responses of aramid fibrids dispersed in mixtures of corn syrup and water were determined in dynamic shear, steady shear, low shear capillary, and extensional stretching flows. Yield stress, strong shear thinning, thixotropy, and strong …
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Rheological Aspect of Cell-Free Layer Formation in Micro-blood Flow: Experimental and Numerical Study
… cell-free layer (CFL) formation in micro-blood flow and its relation to red blood cell (RBC) aggregation. Both experimental and computational approaches were utilized in characterizing the relationship between the CFL width change and RBC aggregation. The rheological effects of the CFL on the …
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Investigation of a trapezoidal microchannel for hydrodynamic detachment of cells or biomolecules.
… utilizes the characteristic pressure-driven flow of microfluidics to detach cells or biomolecules at the narrow region of interest while enabling flexibility in the rest of the channel with larger height and low shear stress. A fluid dynamics analysis was performed analytically and using …
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Studies of Biomacromolecule Adsorption and Activity at Solid Surfaces by Surface Plasmon Resonance and Quartz Crystal Microbalance with Dissipation Monitoring
… of highly hydrated CMC layers with relatively low shear viscosities of ~ 10-3 N·s·m-2 and elastic shear moduli of ~ 105 N·m-2. Adsorption of pullulan 3-methoxycinnamates (P3MC) and pullulan 4-chlorocinnamates (P4CC) with different degrees of cinnamate substitution (DSCinn) onto cellulose, …
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EFFECTS OF RESTRICTIVE DISULFIDE BONDS IN THE VINCULIN TAIL DOMAIN
… binding to actin and acidic phospholipid. The low-shear falling ball assay of viscosity provided evidence that all three mutants have a decreased capacity for crosslinking actin filaments under oxidizing conditions. Thus, local conformational changes, notably in the strap and arm regions in the …
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Sea Surface Temperatures and Vertical Wind Shear as Precursors to Tropical Cyclone Activity in the Caribbean and an Expanding Main Developing Region
<p>Sea surface temperatures and vertical wind shear are essential to tropical cyclone formation. TCs need warm SSTs and low shear for genesis. Increasing SSTs and VWS changes influence storm development. This work analyzes SST and VWS trends for the Caribbean, surrounding region, and the Atlantic …
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