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 808 for “"Shear stress"”.
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Boundary Shear Stress Along Vegetated Streambanks
… the effects of riparian vegetation on boundary shear stress (BSS) by completing the following objectives: (1) evaluating the effects of streambank vegetation on near-bank velocity and turbulence; (2) determining a method for measuring BSS; and, (3) examining the effects of streambank vegetation …
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Fluid Shear Stress Effects on Cancer Metastasis
… it remains a poorly understood phenomenon. Fluid shear stress is common to all metastatic events but its effects on circulating tumor cells (CTCs) remains a mystery. It is known that shear stress can act either directly, causing membrane rupture and cell death, or by altering cell phenotype via …
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Chronic Shear Stress Effects on Endothelial Cell Response
… focus of this dissertation is on how chronic shear stress alters the synthesis and secretion of important regulatory molecules by endothelial cells. Our hypothesis was that inclusion of chronic pulsatile shear stress in our model would lead to changes in endothelial cell release of regulatory …
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Bed shear stress under wave runup on steep slopes
… measurements of swash hydrodynamics and bed shear stress were obtained for surging, collapsing, plunging and spilling swashes, in both medium and prototype scale fixed-bed laboratory wave flumes with steep slopes (1:3 and 1:6, respectively). The hydrodynamics of swash flows were found to …
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Characterization of Fractures Subjected to Normal and Shear Stress
… specific stiffness, for a fracture subjected to shear and normal stress, are presented and analyzed. The experimental work focuses on the determination of relations between normal and shear fracture specific stiffness and between spatial distribution of fracture specific stiffness and fluid flow …
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A liquid-shear-stress sensor using wafer-bonding technology
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Glycocalyx acting as a mechanotransducer of fluid shear stress
It is widely recognized that fluid shearing forces acting on endothelial cells (ECs) have a profound effect on EC morphology, structure and function. Recent investigations in vivo have indicated the presence of a thick endothelial surface layer, also called the glycocalyx, with an estimated …
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The interfacial shear stress failure of flawed fiber composites
… is then used to compute the average fiber stress at composite failure. This allows calculation of composite strength by the well known law of mixtures. Composite strength determined by this method show good correlation with published experimental values for glass fiber composites.
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Development of Facilities for the Testing of Shear Stress Sensors
… constructed to enable development of novel shear stress measurement devices. Three facilities were designed, constructed and tested to progressively test the sensor: a calibration chamber to apply a mechanical shear stress under various temperatures and pressures, an impinging jet to test …
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A cell-based sensor of fluid shear stress for microfluidics
… in a device. Flows inevitably generate fluid shear stress (FSS) that may cause undesirable physiological cell stress. Simple assays of cell viability, morphology or growth are typically reported to indicate any gross disturbances to cell physiology. However, no straightforward metric exists to …
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Investigation of a pressure rise in a shear stress gauge
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Development of a MEMS Sensor for sub-kPa Shear Stress Measurements
… sensors for measuring sub-kPa (<1000Pa) wall shear stresses in high-speed turbulent flows. Wall shear stress is an important flow quantity that is used to characterize flows that can be found in aerospace, automotive, and biomedical applications. Sensors that can measure this quantity could …
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A theory for the performance of hot-film shear stress probes
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1983.
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Estimation of the bed shear stress in vegetated and bare channels
The shear stress at the bed of a channel influences important benthic processes such as sediment transport. Several methods exist to estimate the bed shear stress in bare channels without vegetation, but most of these are not appropriate for vegetated channels due to the impact of vegetation on the …
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Development of a new wall shear stress gauge for fluid flows
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1988.
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Development of a direct-force-reading, thin-film shear stress gage
… metal film mounted flush to the wall surface. Shear forces acting on the thin-film surface cause strain concentrations to develop in the attachment tabs where strain sensors are located. The shear forces are related to the differential output of the strain sensors located on each of the …
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Development of a methodology for applying shear stress to suspended mammalian cells
Fluid shear stress is a typical mechanical stimulation that mammalian cells are exposed to both in vivo and in vitro. In in-vivo conditions, the stress exists in the blood and lymphatic vessels as well as other body fluids transmission paths, including the tissue interstitial flow, the bone marrow, …
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