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Showing 1 to 20 of 691 for “"hollow"”.
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Hollow cathode life time modelling
Hollow Cathodes (HCs) are of primary importance in the field of electric space propulsion, being used as electron sources in ion and Hall-effect thrusters. Hence, their lifetime is a key factor in all these applications.<br/><br/>HCs have demonstrated the capability of providing up to 30,000 hours …
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In the hollow of a tree
1 PDF file (v, 74 pages)
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Crystalization studies in hollow fiber devices
… tested in the unique flow environment offered by hollow fiber devices. In addition, a new type of heat exchanger based on hollow fibers was tested as well as the potential use of porous hollow fiber devices as mixing devices. Hollow fiber devices are compact, extremely efficient on a volumetric …
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Diffuser Operations at Spring Hollow Reservoir
… in algal blooms the following year. Spring Hollow Reservoir, located in Roanoke County, Virginia is a deep reservoir that undergoes stratification during the summer months. During 1997 Roanoke County purchased a bubble-plume diffuser from Tennessee Valley Authority (TVA) to oxygenate the …
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Polyacrylonitrile hollow fibre membranes for gas separation
Polyacrylonitrile (PAN) hollow fibres have been spun by a dry-jet wet spinning technique, using a commercial PAN polymer (Courtelle) redissolved in dimethylformamide (DMF). After failure to produce satisfactory porous hollow fibres from PAN/DMF solutions, a series of studies on the porous …
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Protein polarization in packed hollow fibre bioreactors
… retained in the extra capillary space (ECS) of hollow fibre bioreactors (HFBRs), can influence the hydrodynamics of such devices. A mathematical model was developed to describe the coupled hydrodynamics and high molecular weight protein transport in a cell filled HFBR. It was assumed that the …
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Deciphering optical properties of hollow gold nanospheres
Hollow gold nanospheres (HGNs) demonstrate a tunable localised surface plasmon resonance ranged from the visible to near infrared (NIR) which is of significant importance for bioimaging due to the better penetration depth and reduced autofluorescence. They consist of high quality nanoshells with a …
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Carbon dioxide transfer through hollow fiber membranes
… aqueous solution using hydrophobic microporous hollow fiber membranes (HFM's) were performed. The use of HFM's for CO2 transfer could significantly improve the biomass growth rate in a photobioreactor for algal biofuel production. The membrane modules were operated in a sealed-end, parallel flow …
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Continuously Stratified Flow Dynamics Over a Hollow
… lower Chesapeake Bay bathymetric depressions (hollows) in order to determine the effects of a hollow on a continuously stratified flow. Measurements showed an acceleration of the near-bottom flow as it moved toward the deepest part of the hollows, in contrast to the deceleration expected from …
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A hollow cathode source for spectroscopic investigations.
… the most promising types of light source is the hollow cathode glow discharge tube. In view of this, the present research was undertaken to develop, build, and study a hollow cathode glow discharge tube and the necessary vacuum, circulating, purifying system, for use with the high resolution …
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Hollow condensates, topological ladders and quasiperiodic chains
… physics. We theoretically address the physics of hollow Bose-Einstein condensates and the behavior of vortices within them then discuss localization-delocalization physics of one-dimensional quasiperiodic models, and end by focusing on the physics of localized edge modes and topological phases in …
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Blast Performance of Hollow Metal Steel Doors
… to support the development of blast resistant hollow metal doors. A total of 18 static beam-assembly tests were conducted, which consisted of the flexural four-point bending of door segments, to inform on the performance characteristics of full-sized blast resistant doors. Six tests were …
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Crush Strength Analysis of Hollow Glass Microspheres
Porous Wall Hollow Glass Microspheres (PWHGMs) were developed by the Savannah River National Laboratory. What makes these microspheres unique is the interconnected porosity spread throughout their wall allowing various materials to travel from the surface to the hollow interior. With their …
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Irregular Welded Rectangular Hollow Section Truss-type Connections
… presents research on four welded rectangular hollow section truss-type connections. Each type of connection was mainly investigated using numerical methods, with finite element models validated against experimental tests that were performed by either the author or other researchers. Design …
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Hollow fiber membrane-based air gap membrane distillation
… characteristics of AGMD are evaluated by using a hollow-fiber-set-based compact device. Hot brine solution and cold water are passed through two different fiber sets separately: porous hydrophobic polyvinylidene fluoride hollow fibers of the E type (PVDF E) and solid polypropylene (PP) hollow …
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Fabrication of Hollow Optical Waveguides on Planar Substrates
<p>This dissertation presents the fabrication of hollow optical waveguides integrated on planar substrates. Similar in principle to Bragg waveguides and other photonic crystal waveguides, the antiresonant reflecting optical waveguide (ARROW) is used to guide light in hollow cores filled with …
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Hollow Fiber Ultrafiltration of Water Extracts of Soybeans
Made available in DSpace on 2014-12-13T19:47:44Z (GMT). No. of bitstreams: 1 7915408.pdf: 7836603 bytes, checksum: 26a67ea0454cc7053c8be0304b6ebba6 (MD5) Previous issue date: 1979
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