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 197 for “"Constant temperature"”.
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Constant-temperature constant-voltage charging method for lithium-ion battery technology
… because of the Li-ion battery's uncontrolled temperature increase. This thesis evaluates the Constant-Temperature and Constant-Voltage (CT-CV) charging methodology for three different Li-ion batteries over a temperature range of 0°C-50°C. Similarly, the conventional Constant-Current and …
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Bound Water Defined and Determined at Constant Temperature by Wide-Line Nmr
Made available in DSpace on 2014-12-10T22:38:14Z (GMT). No. of bitstreams: 1 7105232.pdf: 4957788 bytes, checksum: bd1fe66a2a96a22dbf78cef62f1ba20c (MD5) Previous issue date: 1970
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Investigation of constant temperature transformation of Al-Cu - Mg-Zn solid solutions
… physical properties without being cooled to a temperature below the aging temperature at any point in the heat treating cycle. However, such a method of heat treatment in no way alters the time required for the precipitation heat treatment at 121 ℃. This refers to specimens of the type used in …
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Low and Structure at Constant Temperature in a Superplastic Fe-Al-Mn-C Alloy.
… original lengths during deformation at elevated temperatures. Micrograin superplasticity is exhibited during deformation at constant temperature by metals having a fine grain structure and is to be distinguished from transformation superplasticity which is exhibited by metals which are repeatedly …
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Ionic regulation in goldfish, Carassius auratus, acclimated to constant and diurnally-cycling temperature conditions
The effects of a diurnal sine-wave temperature cycle (250 +- 5° C) on the wa terI-e etc r o1 yt est a t us 0 f gol df1' Sh , Carassius auratus, was assessed through determination of Na+, K+, Mg2+, Ca2+, Cl- and water content in plasma, Red blood cells and muscle tissue. Animals were also acclimated …
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Design of a microcomputer-based microporous membrane process controller
… process is based on stretching the material in a constant temperature solvent bath. This thesis describes the hardware and software designed to direct and monitor the process. A VIC 20 is used as the process-controlling microcomputer. The system features two dedicated motor controllers and two …
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A Study of the Solubility of Potassium Chloride in the Presence of a Strong Electrolyte With No Common Ions
… of the salt in the saturated solution. At constant temperature and pressure, the activity of the solid will be a constant k'.
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Studies of the establishment of subterranean clover (Trifolium subterraneum L.) and the rate of breakdown of hardseededness
… in the soil. The germination percentages at constant temperature of 15°C remained low at each different time of sampling of the seed and there was no differences between seeds from laboratory or buried in the soil. A study over five months showed that germination remained low at constant …
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Time-resolved heat transfer measurements and analysis in the wake region of a cylinder in crossflow
… surface. The thin-film gage was maintained at a constant temperature by a constant temperature anemometer unit. A temperature controller actively matched the surrounding cylinder surface to the gage temperature to maintain a constant temperature boundary condition. The frequency response of the …
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Thermal Gradients in Southwestern United States and the Effect on Bridge Bearing Loads
… concrete bridges was attributed to nonlinear temperature distribution through the depth of the bridge. While the effect of thermal gradient on stress distributions has been previously investigated in concrete bridges, less research has been done investigating the effect on bearing loads. The …
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Design and testing of the thermal properties of the structure of an ultra high-throughput mutational spectrometer
… to be spontaneous, using a technique known as constant denaturing capillary electrophoresis (CDCE). CDCE requires a region of constant temperature and concentration of denaturant. A massively parallel, fully automated instrument, capable of handling as many as 10,000 DNA samples simultaneously, …
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Bacteria mediated heat sinks
… performance characteristics heavily dependent on temperature, and therefore, maintaining constant temperature is essential in order to eliminate drift in device efficiency. Constant temperature controllers, however, can often be complicated and only stay within a certain range of a set …
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Evaluation of an aluminum latent heat storage system for the fluoride-salt-cooled high-temperature reactor
… phase change medium (PCM) that transfer heat at constant temperature. The use of metallic PCMs allows LHS to be used with high-temperature heat sources, such as the Fluoride-Salt-Cooled High- Temperature Reactor, and the use of a metallic heat transfer fluid (HTF) allows for a high rate of heat …
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Efecto de la disipacion viscosa en la condensacion de vapor sobrecalentado
… over an horizontal, isothermal flat plate ata constant temperature, is analyzed. Condensation of pure vapour is treated as a particular case. The problem is formulated as an exact boundary layer solution. For numerical solution, steam as the condensing vapour and air as the noncondensable gas …
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The effects of nickel on the completely mixed activated sludge process
… process. The model units were located in a constant temperature room maintained at 20±2°C. The batch reactors were operated under acclimated and shock loaded condition with various nickel concentration to determine its effects on the rate of COD removal. The continuous flow units were …
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An Experimental Study of CO2 Dissolution into a Heavy Oil Without or With a Porous Medium
… medium at different initial pressures and a constant temperature were measured and compared. In addition, the temperature dependence of the CO2 diffusivity in the Colony heavy oil was noted. Three different theoretical diffusion models for determining the diffusivity of a solvent in a liquid …
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Automated PAM Fluorometry as a Tool to Evaluate the Photosynthetic Response of Undaria pinnatifida to Experimental Warming
… performance may be disrupted by elevated temperatures. Pulse-amplitude modulation (PAM) fluorometry is a non-invasive technique commonly used to assess species’ photosynthetic performance. However, its suitability for unattended and automated in situ monitoring of seaweed photosynthesis …
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Modeling air transportation of fresh seafood
… precooling, gel pack effectiveness, external temperatures encountered by shipping containers, and coolant placement in a shipping container. Experiments were conducted to determine cooling times of 10 and 20 pound boxes and 10 pound bags of whole fish. The ”10-pound” box was then modelled …
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