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 27 for “"Surface Type"”.
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Arbitrary Degree T-Splines
<p>T-Splines is a freeform surface type similar to NURBS, that allows partial rows of control points. Up until now, T-Splines have only been formally defined for the degree three case. This paper extends the definition to support all odd, even, and mixed degree T-Spline surfaces, making T-Splines a …
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Effects of Surface Condition on the Fatigue Behavior of CFRP-to-Steel Joints
… bonded using a two-part epoxy adhesive. Two types of steel surface conditions were considered to evaluate the fatigue behavior under constant force amplitudes. Roughness on the steel substrate was achieved by ½ in (13 mm) diameter pits approximately 1/8 in (3.18 mm) deep to simulate an …
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Mineral dust lofting and interactions with cold pools
… dust storms, or haboobs, form when strong surface winds loft loose soils in convective storm outflow boundaries. Haboobs are a public safety hazard and can cause a near instantaneous loss of visibility, inimical air quality, and contribute significantly to regional dust and radiation …
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To the Window, To the Wall: Improving Environmental Monitoring Protocols
<p>Detecting microorganisms on environmental surfaces via an environmental monitoring (EM) program is part of a preventive food safety culture. Environmental monitoring should 1) verify that food safety plans are reducing cross-contamination risk from surfaces to food, 2) pinpoint microbial niches, …
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T-spline Merging
… these models have been made of NURBS surfaces. For various reasons it is problematic and often times mathematically impossible to combine several NURBS models into one continuous surface. The recent invention of a surface type called T-splines has made the combining of NURBS surfaces …
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Effectiveness of Spatial-temporal Data Using GIS in America’s Professional Sports Leagues (MLS, MLB, and NFL)
… These stadium attributes include field surface type, roof type (i.e., open, fixed, and retractable), time zone, and field orientation (e.g., N/S, E/W, NE/SW) for U.S. professional sports such as soccer, baseball, and football. Winning percentage, winning streak, and losing streak were …
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The application of low dose SIMS to surface studies on compound semiconductors
… secondary ion mass spectrometry is assessed as a surface analysis technique for compound semiconductor surfaces. Two types of surface analysis problems are addressed - the use of SIMS to monitor cleaning of GaAs substrates in UHV for MBE growth and adsorption studies - and the use of SIMS in …
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Meta-Analysis on the Effect of Interventions Used in Cattle Processing Plants to Reduce Escherichia coli Contamination in Beef
… vacuum, and water wash interventions on carcass surfaces (n=249) were 1.44 [95% CI: 0.73 – 2.15], 2.07 [1.48 – 2.65], 3.09 [2.46 – 3.73], and 1.90 [1.33 – 2.47] log CFU/cm2, respectively. Least-squares means log reductions for acetic acid, lactic acid, sodium hydroxide, and water wash on hide …
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Naturalistic Driving Data for the Analysis of Car-Following Models
… driver, and can also capture changes in roadway surface type and condition. With the error values close between the RPA and Gipps models, the additional advantages of the RPA model make it the recommended choice for simulation.
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Assessing Crash Occurrence On Urban Freeways Using Static And Dynamic Factors By Applying A System Of Interrelated Equations
… different categories of crashes divided based on type of crash, or condition in which they occur, 3) safety models to determine the probability of crash occurrence, including a rainfall index that has been estimated using a logistic regression model. The study corridor is a 36.25 mile stretch of …
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3D Shape Correspondence: Beyond Groupwise Methods and Smooth, Closed Surfaces
… in their application to the smooth, closed-surface type of shape. Due to the importance of shape correspondence in various computer vision tasks, especially medical imaging-related applications, this work investigates the problem of shape correspondence for the case of open-surface shapes …
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Design of a non-contact vibration measurement and analysis system for electronic board testing
… can be used to measure the displacements of any surface type or material. The measurement grid resolution is 0.7 inches horizontally 0.4 inches vertically. Testing showed that the system captured the natural frequency and peak displacement of the board's first mode within 1.5% accuracy and 0.7% …
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Synapsid Burrows in the Lower Jurassic Navajo Sandstone, Utah
… to fossil and extant synapsid burrows. Two types of burrows are distinguished by their size. Type I burrows are large diameter and comprise complex, high density sinuous tunnels, Y- and T- branched tunnels, sinuous ramps, and chambers. Type I burrows at one locality weather into mounds …
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Synthesis, characterization and high pressure propene oligomerization over heteropoly acids, SAPO-11 molecular sieves and MeAPSO-11 molecular sieves
… salts of 12-tungstophosphoric acid, a 12-type HPA with the Keggin anion structure, were synthesized: AI, Fe, Ce, Ni, Co, Cu, K and NH₄, as well as the AI and NH₄ salts of 12-tungstosilicic acid. Physicochemical characterization of the HPA salts revealed that, depending on the counter …
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Assessing and Evaluating Recreational Trails on Public Lands
… differences in trail width based on trail surface type, and the presence or absence of trail borders. A novel approach of comparing intended widths to actual widths enabled us to look specifically at the avoidable and undesirable impacts associated with having a trail that is wider than …
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Effect of Alternative Household Sanitizing Formulations Including: Tea Tree Oil, Borax, and Vinegar, to Inactivate Foodborne Pathogens on Food Contact Surfaces
… alternative, tea tree oil, as a food contact surface sanitizer. Three foodborne bacterial pathogens (Listeria monocytogenes N3-031 serotype 1/2a, Escherichia coli O157:H7 strain E009, and Salmonella Typhimurium ATCC 14028) were applied separately onto three different food contact surfaces …
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Winter Carbon Dioxide Efflux in Sierra Nevada Meadows: Contributions to Annual Carbon Budgets, Influence of Snowpack, and Subnivean Conditions
… CO2 efflux measurements across both snow surface and subnivean environment (including soil, water, and ice). Mean winter CO2 efflux rates among both meadows, all collection dates and all surface types (snow, soil, ice and water) was ~1.5 μmol m⁻² s⁻¹. When comparing both sites in the …
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Comparing the distribution of pathogenic bacteria and common indicator microorganisms in biofilms on different surface types in an agricultural watershed in British Columbia (Canada)
… and pathogens in biofilms on different surface types in natural aquatic environments. This study was conducted to examine the distribution of pathogens and indicator bacteria in biofilms in an agricultural watershed. The study particularly focused on whether biofilms can act as sinks for …
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The development of undergraduates' approaches to studying and essay writing in higher education
… in higher education little is known about the type of learning developed in this system. Biggs (1996) expressed concern that university learning is represented by increased knowledge and assessment requiring students to reproduce content, not demonstrate critical thinking. He claimed that this …
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Airflow dynamics in transverse dune interdunes
… to sample interdunes with different size and surface type characteristics, the dynamics of which were investigated for when incident flow was normal to the upwind crest. The findings confirm existing models of aeolian dune lee-side flow in terms of flow re-attachment length and recovery …
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