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 224 for “"Four Point"”.
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Design of a four-point seat-belt presenter
… design and prototype a seat-belt presenter of a four-point seat-belt system for the Lear Corporation. The seat-belt presenter designed is to be implemented in automobile seats in order to facilitate putting a four-point seat belt. The worked perform is the culmination of both Petr Petri and …
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Three-Dimensional Mixed-Mode Fracture of the Four-Point Shear Specimen
… to study two specimens: the (antisymmetric) four-point shear (FPS) specimen— a mode II test specimen, and the asymmetric four-point shear (AFPS) specimen — a mixed mode I/II specimen. Complete solutions of fracture mechanics parameters KI, KII, KIII, T11, and T33 have been obtained for a wide …
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Evaluation of ceramic candle filters degradation and damage location using four-point bending tests
… the predicted values from vibration analysis. Four-point bending tests were conducted on seven intact filters, which included five used Schumacher filters, one new Schumacher filter and one new Refractron filter. Each ceramic candle filter was subjected to an applied load up to 40.7 lb. and the …
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Experimental Investigation Of Fatigue Behavior Of Carbon Fiber Composites Using Fully-Reversed Four-Point Bending Test
… the main methods to predict fatigue life is the four–point bending test. In most previous works, the tests have been done in one direction (load ratio, R, > 0). In the current work, we have designed and manufactured a special fixture to perform a fully–reversed bending test (R = …
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Movement Response Times Associated with Blocking in Football from the Three- and Four-Point Center Stances
… movement times resulting from assuming the three-point and the four-point center stances, for junior high, senior high, junior college and college football players without previous experience at the center position; and (2) to determine the significance of difference between means of right, left, …
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Dynamic Wave Simulation of Unsteady Open Channel and Surcharge Flows in Sewer Networks (saint-Venant Equations, Four-Point Implicit Finite Difference, Storm Sewer Drainage, Urban Hydrology)
Sewers are traditionally designed to operate under open-channel flow conditions. However, it is not uncommon that under high flows some or all of the pipes in a sewer network may change from open-channel flow to surcharge flow. For surcharge flow in a sewer there exist two techniques of …
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Mechanical behavior of dip-brazed aluminum sandwich panels
… cellular cores of varying shape. Compression and four point bend tests were performed on sandwich panels with square and triangular honeycomb cores. These honeycombs were made of perforated aluminum sheet of repeating diamond and hexagonal patterns. The sandwich panel assemblies were joined via …
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Characterization of Ultra-High Performance Concrete Tension Behavior Using Different Test Methods
… and standardized. Direct tension (DT) and four-point bending (4PB) test methods are two commonly used methods in research and practice to assess the tension behavior of fiber-reinforced concrete. This thesis work provides a comprehensive analysis of the experimental investigation, test …
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Influence of design and coatings on the mechanical reliability of semiconductor wafers.
… the bulk mechanical properties of a wafer. Three-point bending was used to evaluate the laser scribe density and chemical processing effect on wafer strength. Drop and strike tests were employed to investigate the edge bevel profile effect on the mechanical properties of the wafer. To characterize …
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Studies of superconformal field theories using GLSM and conformal bootstrap
… that these models flow into superconformal fixed points describing string theory compactifications backgrounds with non-trivial H-flux turned on. By analyzing quantum-consistency of effective theories with such mechanism, we identify conditions under which these theories to become interacting …
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Relationship of Mechanical Deformations and Electrochemical Properties of Lithium Ion Batteries-An Experimental Study
… cells were subjected to indentation to the point of mechanical failure. Second, pouch cells were subjected to three different four-point bending conditions, and cycled through 10 charges and discharges. Upon completion of the cycling, the pouch cells were removed from the four-point bending …
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Probing Entanglement and Symmetry Breaking Orders via Spectroscopies and Machine Learning
… under exceptional precision, it can measure four-point correlations beyond the capability of other spectra techniques, which inspires new entanglement probes. This dissertation contains many aspects of probing entanglement and symmetry breaking orders using both spectroscopies and machine …
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Structure, property, and processing relationships of CMZP - [(Ca<sub>0.6</sub>,Mg<sub>0.4</sub>)Zr₄(PO₄)₆]
… hot pressed CMZP at room temperature were: (1) a four-point flexure strength of 124.77 MPa, (2) an elastic modulus of 118.45 GPa, and (3) a Weibull modulus of 10.7. At 850°C, the flexure strength and elastic modulus were 118.35 MPa and 68.63 GPa while at 1050°C they were 89.57 MPa and 78.27 GPa. …
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Ecological literacy in a context of first-year college students
… a large land grant university. Specifically, a four-point typology of environmentally responsible behaviors for first-year college students was identified that included dimensions related to consumer, disposal, reuse and conservation activities. The results of the typology were subsequently used …
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Adobe materials for structural walls
… properties and wallette elements undergoing four-point bending. Ninety-four mortar cubes of varying material makeup, age, and drying environments were tested in compression. It was found that controlled drying conditions and the addition of asphalt emulsifier had the most significant effect …
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In-Plane Conductance of Thin Films as a Probe of Surface Chemical Environment: Adsorbate Effects on Film Electronic Properties of Indium Tin Oxide and Gold
… in its in-plane conductance as measured by a four-point probe configuration. The conductance varies monotonically with pH suggesting that the degree of surface protonation or hydroxylation controls the surface charge density, which in turn affects the width of the n-type depletion layer, and …
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Fabrication and characterization of wafer-level gold thermocompression bonding
… min). The resultant bond was quantified using a four-point bend-delamination technique. High bond toughness was obtained and the bond quality was found to improve with increases in the bond temperature and pressure. However, non-uniform bonding was observed. Using finite element analysis, …
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Higher order mesh curving using geometry curvature extrapolation
… of the mesh. Edges are represented using four point Bézier curves to determine the positions of higher order edge points. Higher order face and volume points are positioned using the basis functions for serendipity face and volume elements. Parameters are defined which allow user specified …
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A comparison of the preferred visual characteristics of selected resort hotels and casinos along the Las Vegas Strip
… through an interview and a survey using a four point rating scale. Preferences were determined from photographs depicting various Las Vegas resort hotel and casino imagery. Preferential judgements and comparative appraisals were used to identify visual characteristics in the photos. Both …
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Rehabilitation of timber railroad bridges using glass fiber reinforced polymer composite wraps
… recovery of strength of repaired timber beams, four full scale (8&inches; x 16&inches; x 12&feet;) timber stringers were tested in a controlled laboratory setting in four point bending configuration. Two control specimens were tested to failure in bending. The specimens were then repaired using …
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