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 60 for “"Surface profile"”.
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Two-dimensional separate-sided surface height profiling of lumber
… point and line scanners is used to obtain a surface profile of the entire (two-dimensional) top and bottom surfaces of a lumber board. Each surface profile is independent of the other and free of data contamination caused by relative motions between the measured surface and sensors. Point …
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Experimental investigation of scattering from randomly rough elastic cylinders
… for the backscattered field from a specified surface profile. Experimental measurements from dense elastic (stainless steel) cylinders immersed in water are presented to quantitatively illustrate the effects of small scale surface roughness (δs/a = 0.0131 where δ is the surface rms roughness …
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Water surface profiles in side channel spillways : comparisons between computed and experimental values
This thesis is an investigation into the water surface profiles found in side channel spillways. The classical method proposed by Hinds is investigated, with specific reference to the water surface slope equation. A literature review is given on the evolution of the theory, from the conceptual …
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Effect of pavement surface properties on life cycle cost analysis
… normal operating conditions are due to pavement surface profile, while costs that occur during work zone activities are due to agency decisions on work zone conditions. In traditional LCCA, it is assumed that work zones costs are the main part of user costs. The work zone costs include vehicle …
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Carbon Fiber Reinforced Polymer Retrofits to Increase the Flexural Capacity of Deteriorated Steel Members
… Corrosion damage typically results in a variable surface profile, which may affect a CFRP retrofit's bond behavior. While limited laboratory testing has been conducted on CFRP attached to steel structures with simulated deterioration, the surface profile does not represent realistic conditions. …
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The response of Hagafellsjökull Vestari glacier, Iceland, to future climate scenarios computed with a dynamic glacier flowline model coupled to a degree-day mass balance model
… model is then calibrated against the 2007 surface profile extracted from a DEM constructed from LiDAR data. During calibration the model is run from 1997 to 2007 with the mass balance input provided by the calibrated degree-day model. A number of changes had to be made to the model in order …
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A study of water wave reflection using close range photogrammetry
… the technique that is used to measure the water surface profile, as it produces an accurate and comprehensive analysis of the water surface profiles. Conventional photogrammetry techniques (photography) were used in preference to near real time photogrammetry (digital). Although near real time …
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A dual differential interferometer for measurements of broadband surface acoustic waves
… direction of propagation of broadband ultrasonic surface waves is described. Each pair of focused laser probe beams is used in a separate wideband differential interferometer to independently detect the component of surface wave motion along one direction of the surface. By combining the two …
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Optimized Surface Roughening by Pulsed Waterjet for Suitable Adhesion Strength of Plasma Transferred Wire Arc Coating
… nickel-aluminum pre-bond coat by optimizing the surface roughness profile of the substrate to provide acceptable mechanical bonding between the coating and substrate. In this study, low carbon stainless-steel was plasma spray coated on a range of pulsed waterjet roughened grey cast iron and cast …
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Spatially varied flow with decreasing discharge
… of theoretical dynamic equations of water surface profile developed from both momentum principle and energy principle. Method of analyses used in this paper included: (1) experimental study and (2) numerical investigation. Experimental work was conducted in a rectangular flume with width x …
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Learning boiling properties of materials
… learning algorithms to predict a material surface’s boiling properties, including its critical heat flux and boiling curve. Our dataset contained over 200 sandblasted copper surfaces and corresponding boiling data collected from experiments. Starting with high-level input features, we found …
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Low-frequency, low-amplitude MEMS vibration energy harvesting
… deposition along the fabrication steps. Static surface profile of the released device shows bi-stable buckling of 200 [mu]m which matches very well with the design. Dynamic testing demonstrates the energy harvester operates with 35% bandwidth under 70Hz at 0.5g, operating conditions that have …
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Analysis of the vibrations of inflatable dams under overflow conditions
… yields the equilibrium state for both the free surface profile and the shape of the dam. The dynamic analysis investigates the small vibrations of the inflatable dam about the equilibrium state. The dam is inextensible, air-inflated, and has two anchored points. The base width, curved perimeter, …
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Experimental Investigation of Steady Flows at a Breached Levee
… sluice gate at its downstream end. Water surface elevation and the three-dimensional velocity field are measured by a point gauge and an Acoustic Doppler Velocimeter (ADV), respectively. Time-averaged measured values of velocity field and free surface elevation are presented. In addition, …
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Effect of Titanium Nitride Surface Layers on Deuterium Absorption and on Sub-Surface Concentration Profiles in Titanium
A three-region nitrogen concentration near-surface profile is obtained. The first region spans from 100 to 1000 A depending on the gas exposure time, and contains about 33 at. % (Ti2N). The second region contains solid solution of nitrogen in close packed hexagonal (cph) titanium TiN x, with x …
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Investigation of Chloride-induced Stress Corrosion Cracking for Long-Term Storage of Spent Nuclear Fuel in Dry Storage Systems
… evaluation of optical micrographs from a 3D Surface Profiler was performed for 16 corroded samples and compared with 2 reference samples. Cracking was observed on 12 out of 16 samples exposed to 35℃ and 50℃ for durations ranging from 8 to 14 weeks. Likely cracking observations were noted on 4 …
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Development of laboratory spine with artificial muscles
… for intervertebral disc, which has an accurate surface profile to fit between the two vertebral bodies above and below it, is discussed in this thesis.
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Fluid Agitation Studies for Drug Product Containers Using Computational Fluid Dynamics
… such as viscosity, angular velocity, and surface tension. Experiments were conducted using Amgen's own equipment to capture the images of the spin-stop process and validate the models created in Fluent. Observations were made to see the effects of bubble formation or splashing during …
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A study of contact between a profile meter stylus and polymer films on roughened substrates
… to measure the roughness of the polymer film surface using a stylus-type profile meter, the pressure between the tip of the stylus and the film is sufficient to plastically deform the polymer surface. The result is a possible erroneous measurement of the surface roughness of the polymer film. …
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Development and analysis of computer aided design and drafting software for storm sewers
… be entered. The software also creates plan and profile drawings of the storm sewer system through AutoCAD. There are other unique features. The software can calculate the hydraulic grade line for the system. If the user enters street centerlines and widths, the program can automatically …
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