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 141 for “"testing machine"”.
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Development of an intermediate strain rate compression testing machine
… stop the experiment, it takes less than 1 of the testing duration to reach testing speed and to stop the experiment. The kinetic energy stored in the wedge bar helps ensure a near constant loading rate over the duration of the experiment. The yield stress is captured at above 80 of the average …
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The development of a testing machine for machinability tests
… the factor of time. The question was, “Could a machine be built which was capable of measuring the differences in materials in terms of the variation in the times required to remove metal under a given set of conditions?” The first step in the program to answer this question was to build a …
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Applying Software Engineering Black-Box Methods for Testing Machine Learning Models
… to incorporate and align Software black-box testing methods into Machine Learning (ML) applications, specifically in the context of computer vision models. Typically, testing methods within Software Engineering (SE) encompass a range of test types that assess levels of a software system, such …
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Design and construction of a motor-actuated sea ice compression testing machine
… on developing a specialized sea ice compression testing machine. The machine, designed for harsh sub-zero and saline conditions, would facilitate the immediate testing of ice samples onboard the SA Agulhas II vessel. The research entailed designing and constructing a compression machine capable …
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Design and use of a fixed-end low-load material testing machine
The purpose of this low-load material testing machine is to provide students an opportunity to perform basic material tests on their own instead of watching a lab technician, thus improving the student's lab experience. The machine proposed is small, low cost, and easy to manufacture, assemble, and …
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Design, build and test of a planar biaxial tensile testing machine for skin and other collagenous soft tissues
… and construction of a planar biaxial tensile testing machine, suitable for ultimately testing skin and other soft membrane tissues. The mechanical properties of skin and other collagenous soft tissues are of interest to a wide range of researchers and professionals. Interests include medical …
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A Frictional Evaluation of a New Surface-Modified Titanium Orthodontic Bracket
… resistance was measured on an Instron Universal Testing machine (Instron Corp, Canton, Mass). The brackets/archwire samples were tested one at a time individually. In addition, a single bracket/ archwire sample from each group was repeatedly tested five times. Measurements were made at every …
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Low to high strain rate deformation of amorphous polymers : experiments and modeling
… mechanical analyzer (DMA), a servo-hydraulic testing machine and a split-Hopkinson pressure bar. Tension tests on the DMA were used to characterize the time-temperature dependence of the elastic storage moduli and the loss factors of the two polymers. The DMA data provided a quantification of …
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Influence of a 3-step disinfection procedure on dentin bond strength
… to a bond shearing device on a universal testing machine (Instron) and randomly divided into 2 groups. In Group I (n=30), specimens were treated with chlorhexidine, tubulicid red, and sodium hypochlorite before dentin bonding, following the manufacturer's instructions for All Bond 2. In …
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Axial strain effects on optical fiber mode patterns
… A few-mode fiber is mounted on a tensile testing machine and strained at various speeds. The output of a monochromatic light source passing through it is monitored and recorded. Relations are noted between the light output the magnitude of tension and the rate of the applied axial strain. …
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Implementation of a testing and initialization algorithm for the generalized tree structure
… structure of a generalized tree using, as the testing machines, a set of generalized sequential trees. It is shown that the testing machine can be implemented on a set of trees of the same depth as that of the tree which is being tested. Modifications are made to the generalized tree structure …
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Evaluation of Shear Bond Strength of Two Resin-Modified Glass-Ionomer Cements
… to the bond shearing device on the universal testing machine (Instron). For Group I samples (Rely-X, n=15), the powder and liquid were measured and adjusted to achieve a ratio of 1.6 and mixed for 30 seconds as recommended by the manufacturer. For Group II (Fuji-Cem, n=18), the paste-paste was …
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Evaluation of the Tensile Bond Strength of Orthodontic Bracket Bases Using Glass Ionomer Cement as an Adhesive
… acrylic block that could be held in the testing machine. Pre-encapsulated glass ionomer cement (Ketac-Fil™) was the experimental adhesive. The adhesive was mixed according to the manufacturer's instructions in a dental amalgamator. The specimens were thermocycled between water oaths of …
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Effect of relative humidity on the fatigue characteristics of mild steel in reversed torsion
… tests were made on a Sonntag Universal Fatigue Testing Machine at the rate of 1800 stress cycles per minute. The notched specimens were fatigued in air of zero-five percent relative humidity and in air of 90-95 percent relative humidity. The unnotched specimens were tested in air at three …
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Effect of refrigerant spray on orthodontic composite resin-bracket debond strength and associated adhesive remnant index
… debond strength was tested with a universal testing machine and ARI scores assessed. Results showed no statistically significant difference for shear debond strength or ARI score as a function of refrigerant spray usage. Statistically significant differences were shown for shear debond …
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Development of adhesive bonding and functional testing systems for in-process inspection of hot embossed microfluidic devices
… to study the control of a novel hot embossing machine. By incorporating an in-line measurement system, it would be possible to add feedback control to improve the process. This led to the design of an automated testing machine that uses an optical inspection of the microfluidic channel widths …
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Ship Power Prediction Using Machine Learning
… The focus of this paper is on building and testing machine learning models that can accurately predict the shaft power of a vessel under different conditions. The models examined include pure theoretical models, pure neural network models, and combinations of the two. Using data on two car …
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Design and Development of a Novel Expanding Pedicle Screw for Use in the Osteoporotic Lumbar Spine
… post insertion were built on a rapid prototype machine. A materials testing machine performed axial load to failure tests in both Sawbones and cadaveric specimens comparing the new design to traditional screws (rate = 10mm/min to 20 mm). Output parameters included yield load, ultimate load, …
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