We study analytically the effect of temperature cyclings in mean-field spinglasses. In accordance with real experiments, we obtain a strong reinitialization of the dynamics on decreasing the temperature combined with memory effects when the original high temperature is restored. The same calculation applied to meanfield models of structural glasses shows no such reinitialization, again in accor...

Mesoscopic transport phenomena in the low temperature behavior of MOSFETs with channel lengths down to 30 nm are demonstrated. N-channel MOSFETs show reproducible unexpected periodic transconductance oscillations in the drain current ID versus gate voltage VG characteristics. The oscillations, present from the sub-threshold region up to strong inversion, are reproducible from sample to sample a...

Computational modeling of reaction systems can provide a strong foundation for experimental investigations. In this investigation, we first propose a unique theoretical system for breaking chiral symmetry that utilizes thermal cycling to amplify a small initial asymmetry. Unlike models in the literature, no autocatalytic reactions were needed for homochirality in this model to emerge. Following...

An alternative method of rapid-cycle PCR for DNA amplification is demonstrated using electrolyte resistance for heating and temperature monitoring. The PCR amplification solution is electrically conductive and can be heated by passing an alternating current through the sample. The temperature of the solution is evaluated by monitoring its electrical resistance. Cooling is accomplished by forced...

This study aimed to determine whether postprandial temperature excursions in skeletal muscle are consistent with thermogenesis or altered blood flow. Temperature probes were implanted into the vastus lateralis muscle of ovariectomized ewes, and blood flow was assessed using laser-Doppler flowmetry (tissue flow) and transit-time ultrasound flowmetry (femoral artery flow). The animals were progra...

Polyvinyl alcohol (PVA) is a hydrophilic polymer with various characteristics desired for biomedical applications and can be transformed into a solid hydrogel by physical crosslinking, using a low-temperature thermal cycling process. As with most polymeric materials, the mechanical properties of the resultant PVA are isotropic, as oppose to most soft tissues, which are anisotropic. The objectiv...

The Space Dynamics Laboratory (SDL) has observed, over several years of work with various blackbodies, significant unexplained calibration drifts in some industrial PRTs. With a mandate to build more accurate calibration sources with tens of millikelvin accuracy, SDL began an effort to understand the calibration drifts in small temperature sensors less than an inch long. Testing was performed m...

Polymer electrolyte membrane fuel cells need initial conditioning, activation or break-in the first time they are operated after being assembled. During this period performance of the fuel cell improves until it reaches its nominal performance. The exact mechanism of this initial conditioning is not completely understood, but it is assumed that during the conditioning process the polymer membra...

This study investigated the residual tensile properties of plain woven jute fiber reinforced poly(lactic acid) (PLA) during thermal cycling. Temperature ranges of thermal cycling tests were 35-45 °C and 35-55 °C. The maximum number of cycles was 10³ cycles. The quasi-static tensile tests of jute fiber, PLA, and composite were conducted after thermal cycling tests. Thermal mechanical analyses of...