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 51 for “"semi-circular"”.
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Static and free-vibrational response of semi-circular graphite- epoxy frames with thin-walled open sections
… thin-walled, open section frames. The frames are semi-circular with a radius of three feet, and one specimen has an I cross section and the other has a channel cross section. The flexibility influence coefficients were measured in static tests for loads applied at midspan with the ends of the …
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Coating studies and video imaging of the flow patterns of tablets in a semi-circular fluidized bed
… ≠ 1) in the vicinity of the spray zone of a semi-circular Wurster bed coater. A novel method of computer based video imaging was used to measure the velocity and voidage profiles in the draft tube region of the semi-circular fluidized bed coater. Continuous and pulse coating runs were …
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Laboratory Comparison of Full Depth Reclamation Stabilization Techniques Using Arkansas Field Materials
… in indirect tension mode, creep compliance, semi-circular bend, and indirect tensile strength. The cement stabilized samples were tested using the tube suction test and the semi-circular bend test. Results indicated dynamic modulus is a viable testing indicator for rutting and low temperature …
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Assessment of a compact steam generator aided by computational fluid dynamics
… a compact steam generator with straight, semi-circular channels. The same conditions were used to simulate a zig-zag, semi-circular PCHE. The zig-zag configuration resulted in a 22 °C increase in superheat over the straight channel configuration at the cost of pressure drops that are over …
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Microvascular materials for adaptive electronic structures
… designs consisting of two arrays of straight or semi-circular channels with different inter-channel spacing (ICS) are fabricated through a VaSC process. The four fluids characterized in the microchannel array are also used in these vascular networks for adaptive RF properties from 2.6 – 3.95 GHz. …
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Velocity distribution in steep rough channel
… rectangular, parallelogram, triangular, and semi-circular, were used. Effects on velocity distribution due to variations in discharge, flume slope and roughness geometry were studied for each shape of roughness element. The applicability of logarithmic law was examined and the inflection …
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Laboratory evaluation of cracking in asphalt concrete
… presents testing and analysis of cracking in semi-circular notched asphalt concrete samples in three point bending. Load and crack width data at different locations of the sample were captured in real time using Linear Variable Differential Transformers (LVDTs). Crack initiation, path, and …
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Shoulder pain and cycle to cycle kinematic spatial variability during recovery phase in manual wheelchair users
… kinematic spatial variability during semi-circular wheelchair propulsion as a function of shoulder pain in MWU. Data from 10 experienced adult MWU with spinal cord injury (5 with shoulder pain; 5 without shoulder pain) was analyzed in this study. Participants propelled their own …
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Fatigue behavior of notched carbon epoxy laminates during reversed cyclic loads
… notch configurations, central hole and opposing semi-circular edge notches, were used to obtain a fundamental understanding of the fatigue effect in specimens under low and high cycle lifetimes. Damage was evaluated with penetrant-enhanced X-ray radiography and Iaminate deply. Tensile and …
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Aeroelastic optimization of thin flapping structure
… precision experiments, using an oscillating semi-circular elastic plate as a reduced analog model. The aerodynamic performance of the fans is systematically characterized for a variety of geometric and material parameters, as well as the amplitude of the periodic driving. We demonstrate that …
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The effect of zero point charge environment on rock fracture behavior
… for three rock types in five environments. Semi-circular bend specimens of dolomitic limestone, Sioux quartzite and Westerly granite were tested in aqueous solutions of aluminum chloride, calcium chloride and polyethylene oxide, all at ZPC conditions. These rocks were also tested in …
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Evaluating Nuclear Energy Power Conversion Cycles for Microreactors
… cycles. Printed circuit heat exchangers with semi-circular channels were used in analysis due to their high power densities and low costs, making them extremely suitable for use with microreactors. A stepwise linear solver was implemented for steam generator analysis, while other heat …
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Nonlinear diffraction and refraction of regular and random waves
… is first made to the special case of a a semi-circular peninsula (or a vertical cylinder on a cliff). Effects of the angle of incidence are examined for the free surface height along the cylinder. Numerical results for three examples involving radially varying depth are discussed. In Part …
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Light interaction
… central core, translated through the medium of semi-circular, veneer screens. The light and wood interact, revealing what is hidden, allowing the glowing screens to illuminate the outer circle. On the opposite side of the space are similarly-oriented windows to capture the Summer, Spring, Fall, …
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Quantification of the Role of The Effective Binder in the Performance of RAP – WMA Mixtures
… combination of the production factors. The Semi-Circular Bend (SCB) test at intermediate temperatures was used for cracking evaluation, while the Indirect Tension Test at High Temperatures (IDT-HT) was used for rutting evaluation. Further, the study included rheological characterization of …
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Laboratory and Field Evaluation of Two Warm-Mix Additives in Connecticut and Validation of an Alternative Moisture Susceptibility Test
… tests conducted in the laboratory, such as Semi-Circular Bending, Hamburg Wheel Tracking, Indirect Tensile, and Disk Compact Tension. The results from the WMA specimens are also compared against conventional HMA specimens. Finally, the paper presents the performance data from all three test …
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Dynamic Analysis of an Inflatable Dam Subjected to a Flood
… The fully nonlinear free-surface flow over a semi-circular bottom obstruction was studied numerically in two dimensions using a similar solution formulation as that used in the previous study. A parametric study was performed for a range of values of the depth-based Froude number up to 2.5 and …
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Nongame Vertebrate Survey of Sand Lake National Wildlife Refuge, Brown County, South Dakota
… and emergent (PEMF) wetland habitats using a semi-circular plot method. Playback recordings were used to determine occurrences of secretive species such as rails (Rallidae). One-hundred and sixteen plot counts were conducted on the refuge. Thirty-two breeding species were surveyed in PFOC and …
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An episcopal seminary
The site for this seminary is located within the northwest quadrant of the District of Columbia. The site consists of a ridge approximately one hundred and ten feet in elevation bounded by Clark Street at its north western tip and a rocky promontory a quarter of a mile to the southeast. Along its …
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Properties and deformation characteristics of mechanically worked sintered billets.
… testing specimens of various cross-sections(circular, square rectangular, triangular and semi-circular) and by changing die geometry in order to simulate effects inactual closed die forging. 4. Closed die forging simulating the production of two and four gear teeth of various widths. 5. The …
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