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Showing 1 to 20 of 33 for “"Dimensional changes"”.
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Volumetric dimensional changes of luting cements
… of this study was to evaluate volumetric dimensional changes and the amount of Ca2+ released by the new luting agent. Twenty specimens of each material, namely calcium aluminate glass ionomer, resin-modified glass ionomer, and two resin luting agents, were fabricated and weighed. The 20 …
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Defined Dimensional Changes in Purine Analogues
Pyrazolo{4,3-g}quinazolin-5-one (lin-benzoallopurinol), an extended analogue of 4-hydroxypyrazolo{3,4-d}pyrimidine (allopurinol), and pyrazolo{3,4-f}quinazolin-9-one (proxbenzoisoallopurinol), an extended analogue of 7-hydroxypyrazolo{4,3-d}pyrimidine (isoallopurinol), have been synthesized. The …
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Dimensional changes in hardened gage steels
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Metallurgy, 1947.
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Effects of collagen content, fiber alignment, storage and heating on cooking characteristics, dimensional changes and microstructure of restructured beef
… temperature on cooking characteristics and the dimensional and structural changes of restructured beef steaks. Three replicates of high (HC) and low collagen (LC) raw materials similar in proximate composition, salt content, pH and physical measurements but different in total collagen were …
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Dimensional Changes of ProRoot white Mineral Trioxide Aggregate, EndoSequence Root Repair Material, and Biodentine During Setting Using Digital Image Correlation
Introduction: Dimensional changes in the materials used for root end fillings could enhance or weaken the seal of the filling. The purpose of this study is to quantify and compare the dimensional changes of ProRoot white Mineral Trioxide Aggregate (Dentsply Tulsa Dental Specialties, Johnson City, …
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Development of a model of the anisotropic dimensional change on sintering
… design procedure accounting for anisotropic dimensional changes on sintering. The goal of the project is both enlarging the reference database and investigating in depth the parameters responsible for anisotropic dimensional changes. The effects of green density, geometry, and compaction …
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Conducting polymer actuators
… dimension when their oxidation state is altered. Dimensional changes induced by electrochemical activation in the conducting polymer polypyrrole are investigated. Swept sine and step voltage and current inputs are employed to investigate the nature of this electro-mechanical coupling. Strains of …
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΓΡΑΜΜΙΚΗΣ ΣΥΣΤΟΛΗΣ ΤΩΝ ΑΛΓΙΝΙΚΩΝ ΑΠΟΤΥΠΩΤΙΚΩΝ ΥΛΙΚΩΝ
… IN TWO HOURS FROM THE START OF MIXING ARE GREAT DIMENSIONAL CHANGES. FOR SHORT PERIODS AN ATMOSPHERE OF 100% HUMIDITY IN A CLOSED CONTAINER IS A MORE STANDARISED ENVIRONMENT FOR THE ALGINATE IMPRESSIONS. THE SILICONISED ALGINATES AND VOCOLOID SHOWED EITHER IN AIR OR IN 100% HUMIDITY LINEAR …
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Philtrum Dimension Changes Associated with Extraction Orthodontic Treatment
… To assess and compare philtrum dimension changes among Class I and II orthodontic patients who received either extraction or non-extraction treatment. Materials and Methods: A retrospective study was conducted using pre- and post-treatment lateral cephalograms of patients who completed …
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Processing of nano-sized boron carbide powder
… A dilatometer furnace was used to track the dimensional changes during sintering, and densities of sintered samples were compared to green compact densities. The onset of sintering occurred at various temperatures depending on the dopant and its amount, most often occurring at higher …
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Determination of evaporative flux from water and soil surfaces
… for accurate and non-destructive measurement of dimensional changes during evaporation; (iii) high-quality evaporation datasets were developed for calibration of devices, validation of prediction equations and evaluation of theoretical frameworks; (iv) predictive models for evaporation from water …
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Evaluating the biostability of polypyrrole microwires
… rise and levels off. An experiment on the dimensional changes of the polypyrrole reveals that the polymer shrinks when placed into the solution. This may affect the integrity of the electrode and contribute to the increasing impedance. Further research will be necessary to understand the …
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Technical Design, Surgical Challenges, and Troubleshooting in a Fully Guided Implant Workflow
Optimal three-dimensional dental implant placement in the prosthetically driven position is essential to simplify a holistic prosthetic rehabilitation towards occlusion and aesthetics. The virtual design of the dental implant placement positions in relation to the patient's anatomical features can …
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Effects of small dimensional variations on the performance of a typical bistable fluid amplifier
Small dimensional changes in six parameters were experimentally studied for their effects on the performance of the bistable fluid amplifier. These dimensional parameters were offset, wall length, control width, power nozzle width, wall flat, and power nozzle shape. The investigation was conducted …
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Electrochemical to mechanical energy conversion
… batteries are well-known to undergo significant dimensional changes during lithium-ion insertion and extraction. In the battery community, this has often been looked upon negatively as a degradation mechanism. However, the crystallographic strains are large enough to warrant investigation for use …
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Enhanced ultrasonic techniques for inspection of pressure tubes
… due to transducer alignment caused by the tube dimensional changes. This Thesis focuses on enhancing ultrasonic techniques to improve the inspection accuracy by introducing signal processing algorithms and phased array technology. This work is motivated by the nuclear industry desire to reduce …
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Optical Fiber Fabry-Perot Interferometer based Sensor Instrumentation System for Low Magnetic Field Measurement
… based sensor system for the measurement of 3-dimensional vector magnetic fields. The operation of the sensor system is based on the detection of magnetostrictive dimensional changes in the sensor gage using a modified extrinsic Fabry-Perot Interferometer configuration. Because of the …
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Comparative Studies On Standard and Fire-Rated Gypsum Wallboards.
… properties, such as the heat flow, weight loss, dimensional changes, morphology and crystalline structures of the gypsum wallboards were studied using these techniques.</p>
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Evaluation of Stress and Fatigue in Femoral Hip Implants
… variability of test results, driven by specimen dimensional changes, material differences, and test potting setup variability.</p>
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