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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 47 for “"supercooling"”.
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A study of the supercooling behavior of high purity liquid bismuth
<p>"This investigation involves a study of the supercooling behavior of pure bismuth as affected by the melting atmosphere, the amount of superheat, and the intentional addition of metallic and non-metallic foreign materials to the melt. It was found that the amount of oxide on the melt surface is …
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Effects of cooling rate and supercooling on the formation of ice in a cell population
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1983.
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Post-release establishment and supercooling point assessment of Laricobius osakensis, a predator of the hemlock woolly adelgid
… tree health. Understanding more about the supercooling point of L. osakensis gave insight to its ability to survive subfreezing temperatures as occurred in 2014. Comparison of the supercooling point between the northern and southern populations of L. osakensis, and to the other released HWA …
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Growth of CdTe/ CdZnTe single crystals by the vertical gradient freezing method
… study is undertaken. The phenomena of supercooling and superheating of CdTe/CdZnTe, which play an important role in the quality and size of grown crystals, are discussed. A VGF crystal growth facility and a growth procedure for CdTe/CdZnTe are developed. A unique technique (temperature …
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Cold Tolerance, Diapause and Winter Survival of the Brown Marmorated Stink Bug (<i>Halyomorpha halys</i>)
… by determining its cold tolerance strategy and supercooling ability via the supercooling point (SCP). Metabolic suppression (as measured by flow-through respirometry) indicated that diapause was induced by a critical photoperiod of 11h:13h (L:D), indicating a process potentially influenced by …
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Preparation and Characterization of Bio-based PCM Microcapsules for Thermal Energy Storage
… lower price than the organic PCM. However, their supercooling, phase segregation, and hydrophilic nature have caused major challenges to their applications. Tuning the thermal properties, including crystallization temperature and phase segregation of inorganic PCM by using bio-based nanoparticles …
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Field biology and mortality factors affecting Cassida rubiginosa Müller (Coleoptera: Chrysomelidae), a biological control agent of Canada thistle (Cirsium arvense (L.) Scop.)
… compatible with water saturated soil. The mean supercooling point of C. rubiginosa in summer was -5.2 ± 1.5°C and was significantly different (P<0.05) from mean supercooling points of -9.3 ± 2.1°C in fall and -8.8 ± 2.3°C in winter. Females studied individually produced an average of 61.1 ± 29.9 …
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Critical magnetic fields of superconducting tungsten
… ~ 32u) are favorable for observation of a large supercooling effect in tungsten at temperatures well below Tc. Assuming that the ideal critical supercooling field was observed on an electropolished specimen, the experimental value for u is (2.6 ± 1.6) X 10^-3. A large and reproducible, though …
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Laser induced epitaxy of Ni and Co silicides
… layers. This can be attributed to constitutional supercooling effects. Laser annealing of thermally grown monosilicides gave low (~5%) minimum yields for Co and Ni on <111> substrates1 as well as Ni on <100> substrates. The best yield achieved for Co on <100> substrates is 35%. The formation of a …
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Host influence on the cold hardiness of the emerald ash borer, *Agrilus planipennis* Fairmaire (Coleoptera: Buprestidae)
… ash was assessed using two laboratory measures, supercooling points and lower lethal temperature, in laboratory- and naturally-infested A. planipennis larvae. Supercooling points of A. planipennis larvae from black and green ash, with medians ranging from 25.5 to 32.6°C and 24.0 to 34.2°C …
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Ecology and Climate Tolerance of Emerging Tick Disease Vectors in Central Appalachia/Southwestern Virginia
… and H. longicornis nymphal ticks had a lower supercooling temperature than adult ticks, suggesting their potential to overwinter better; A. maculatum nymphs had similar average supercooling temperatures as the other two species at nymphal stage. Via a field experiment, A. americanum, H. …
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Thermal Performance of Microencapsulated Phase Change Material Slurry
… agent is necessary to prevent a large amount of supercooling of the phase change material. Other experimental results indicate that MPCM slurry's heat transfer coefficient and apparent specific heat are affected significantly by the phase change process and the slurry mass fraction. The study …
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Overwintering biology of the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae)
… tolerance. Overwintering H. halys depress their supercooling point to -15.4 °C and LT50 to -17.5 °C after acute (1 h) exposure, however they do not encounter these temperatures while overwintering indoors. Moreover, overwintering H. halys maintain their water balance through a reduction of water …
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Development and applications of UV written waveguides
… a liquid crystal as examples. The detection of supercooling in water is demonstrated and identification of the supercool state is found to be straightforward. Building on these results, the first tunable planar Bragg grating using a liquid crystal layer is fabricated and experimentally …
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Thermophysical and Structural Measurements of Liquid Metallic Alloys Using Electrostatic Levitation
… of the thermal expansion coefficient on supercooling. This prediction was confirmed by high precision measurements of density in Zr<sub>58.5</sub>Cu<sub>15.6</sub>Ni<sub>12.8</sub>Al<sub>10.3</sub>Nb<sub>2.8</sub> and …
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Cold Tolerance, Temperature Mediated Discontinuous Gas Exchange, and Emergence of the Blue Orchard Mason Bee (<i>Osmia lignaria</i>)
… between low temperatures, emergence and supercooling point of <em>Osmia lignaria </em>were the subject of this study. One hundred sixty-eight bees were subjected to 5 pre-wintering temperature treatments (two constant temperature controls - 22<sup>o</sup>C, 14<sup>o</sup>C, one of which …
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The resilience of Polar Collembola to climate change
… only limited cold tolerance capacities (64 % had supercooling points higher than -10 ℃). Survival rates in response to a desiccation stress were also variable among individuals (range: 1.0-13.5 hrs). This indicated that Arctic Collembola may be pre-adapted to a level of climate warming. I also …
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Chemistry of airborne particles from metallurgical processing
… for particle size and composition is the supercooling of the vapor. The accumulation range, which comprises particles less than 2 micrometers, consists of particles formed from the collision of smaller primary particles from the nucleation range. The composition of agglomerates and …
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