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 21 for “"Narrow channels"”.
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Hydrodynamic interactions in narrow channels
… $1/r$ in bulk, and are assumed to decay in small channels. Such interactions are ubiquitous in biological and technological systems. Here I confine multiple particles undergoing Brownian motion in narrow, microfluidic channels and study their coupling through hydrodynamic interactions. Our …
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Design of MITR II fuel plates. Heat transfer in longitudinal finned narrow channels.
Massachusetts Institute of Technology. Dept. of Nuclear Engineering. Thesis. 1972. M.S.
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Thermally-actuated piezoresistively-sensed mechanical silicon oscillator
… effect caused by running currents through narrow channels. These narrow channels when oriented along the <100>direction in an n-doped Si wafer, show large negative piezoresistance coefficients. Beyond significant threshold DC current densities (GA/m 2 ), the thermal-actuation and …
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Investigation of flow characteristics in an open channel with one-line semicircular vegetation patches
… A dip phenomenon is observed for both wide and narrow channels, but a dip phenomenon for narrow channels always lies lower from the surface than for wider channels. Turbulent intensities vary with different factors like the nature of the channel, vegetation density, and vegetation stem diameter. …
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Some flow properties of liquid helium II
… and pressure dependence of the flow in narrow channels. The channels are in the form of an annular slit between two flat glass plates. Measurements of the flow rates have been made with hydrostatic pressures up to 2.3 x 103 dynes/cm 2, at temperatures between 1.39 and 2.10°K, and …
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The Impact of Process Replacement on Sheet Metal Product Design: The Use of Steel Extrusions Versus Formed Sheet Metal
… for automation, particularly heavy gauge narrow channels. Additionally, it advocates for replacing manual press brake operations with advanced automated tube laser technology. The proposed shift not only simplifies the manufacturing process but also aligns with the broader goal of global …
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The deposition of silica on titanium dioxide surfaces
… Silica coatings deposited at pH 10 contain narrow channels which are accessible to water molecules but not to nitrogen or argon. Neutralization to pH 7 reduces the volume in the coating accessible to water molecules.
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Multifunctional fiber-based neural interfaces
… We found that the topographical features and the narrow channels generally led to enhanced growth. This thesis illustrated a variety of applications of multifunctional fiber-based devices in neuroscience and neural engineering, which anticipated to enable basic studies of the nervous system and …
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Power Sources for Sensors and Robots in Remote and Inaccessible Environments
… can collect the information non-invasively in narrow channels like blood vessels and digestive tracts. Hence, we explored theoretically the possibility of using micro-robots to detect leaks inside tubes, revealing one corner of the tremendous potential of microscopic machines. Finally, we …
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A 3D Computational Fluid Dynamics Model Validation for Candidate Molybdenum-99 Target Geometry
… to server as a cooling agent that flows through narrow channels between the target disks. This thesis investigated the cooling performance on a series of new geometry designs of the cooling channel by using Computational Fluid Dynamics (CFD) software ANSYS FLUENT 14.5. An experiment was also …
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Statistical theory of selectivity and conductivity in narrow biological ion channels : studies of KcsA
Biological ion channels are essential for maintaining life, and appear as a seemingly paradoxical combination of both large conductivity and strong selection between ionic species. This process involves many complicated interactions, and their inclusion in a multi-species conduction model remains a …
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Experimental Investigation of Dimples as a Heat Transfer Enhancement Feature in Narrow Diverging and Converging Channels
… coefficient distributions have been obtained for narrow converging and diverging channels with and without enhancement features. The enhancement feature considered for this study is dimples (inline and staggered) on the main heat transfer surfaces. All the measurements are presented at Reynolds …
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Genome analysis: mutation analysis using near infrared laser-induced fluorescence (NIR-LIF) and single molecule detection in microfluidic devices
… efficiencies were investigated by physically narrowing the channel sizes of the microdevices and by applying electrokinetic focusing. The narrow channels showed 4 times improvement in a 15 µm channel compared to a 50 µm channel. Similar results were demonstrated in the focusing studies. Single …
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Understanding the Yield Behaviour of Single Crystal Ni-based Superalloys
… nucleate in the γ matrix phase and glide in the narrow channels between precipitates. The yield point was found to correspond to the entry of dislocations into the γ' precipitates. Of the dislocations which enter into γ', only a small portion were observed to cross-slip. Due to the two-phase …
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The cloud-radiative forcing of the U.S. landfalling atmospheric rivers
<p>Atmospheric rivers (ARs) are narrow channels in the atmosphere that transport an enormous amount of moisture from the tropics to the higher latitudes. Streaks of highly reflective clouds are observed along with the ARs in satellite imagery. These clouds both influence the moisture transport of …
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Modelling surface evolution coupled with tectonics
… modelling. Following empirical laws, it incises channels of several cells width. The coupling method enables different temporal and spatial resolutions of the SEC and the thermo-mechanical code. It transfers vertical as well as horizontal displacements to the surface model. A weighted smoothing …
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Neutrophil biomechanical properties and immune function in health and inflammatory disease
… as SLE LDGs were increasingly trapped in the narrow channels of a three- dimensional microvasculature mimetic. These results suggest a role for biomechanical properties in modulation of neutrophil trafficking, indicating that SLE LDGs may be increasingly retained in microvasculature networks, …
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Investigation of the Effect of Superhydrophobic Coatings on the Performance of Heat Exchangers
… with the drainage of water through the narrow channels which are designed to allow water to escape in uncoated heat exchangers. Conversely, with the heat exchangers suspended horizontally, the advantage of the superhydrophobic coating was apparent since the system retained significantly …
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Seasons in the Stream: River Ecosystem Phenology in a Changing Climate
… to 6th Strahler order river. First, river ice in narrow channels is dynamic, with more complete ice cover days and mid-winter breakups happening on the narrowest section of the reach. Second, ice cover is habitat-specific, with riffle sequences along the river never reaching complete ice cover. In …
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Halogens and trace elements in subduction zones
… in the overlying mantle is not confined to narrow channels but it is sufficient to pervasively metasomatize the bulk wedge. Energetics of fluorine incorporation in forsterite and forsterite-humite chemical equilibria were explored in the system Mg2SiO4-MgF2 by first principles computations. …
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