Temperature sensitivity of graded synaptic transmission in the lobster stomatogastric ganglion

Abstract The GaAs sample under study is a n-low temperature-i-p structure grown by molecular beam epitaxy with a low-temperature (LT) layer grown at 300?°C and annealed at 620?°C for 1 h. Admittance measurements on this sample reveal a negative capacitance at low frequency. This work analyzes the origin of the negative capacitance and its corresponding frequency-dependent conductance by combining two current components: charging–discharging current and the inertial conducting current. Analysis results indicate that the activation energies and ...

Abstract We report diffuse reflectance spectroscopy (DRS) measurement of Knudsen cell induced radiative heating of the sample during molecular beam epitaxy of GaAs at substrate temperatures between 200 and 600?°C. The temperature rises, as large as 12?°C, were observed for In-bonded samples at a substrate temperature of 200?°C. As-grown GaAs layers deposited between 200 and 300?°C are characterized using double crystal x-ray diffraction. The onset of a distinct x-ray peak associated with the low-temperature grown GaAs layer is identified, at a...

Abstract We report diffuse reflectance spectroscopy (DRS) measurement of Knudsen cell induced radiative heating of the sample during molecular beam epitaxy of GaAs at substrate temperatures between 200 and 600?°C. The temperature rises, as large as 12?°C, were observed for In-bonded samples at a substrate temperature of 200?°C. As-grown GaAs layers deposited between 200 and 300?°C are characterized using double crystal x-ray diffraction. The onset of a distinct x-ray peak associated with the low-temperature grown GaAs layer is identified, at a...

Satellite-derived land surface temperature (LST) is studied for the purpose of understanding regional skin temperature dependency and variability, and its relationship to corresponding, site-specific air temperature. Skin temperature is highly correlated with surface-air temperature although it differs depending on land surface characteristics, terrain, and atmospheric conditions on a diurnal and seasonal scale. The high temporal resolution of the Geostationary Operational Environmental Satellite (GOES) -12 sounder is used to compare the diurna...

Abstract In this work we propose a standard practice covering temperature calibration of a Si substrate, ranging from 400 to 1000?°C, for temperature programmed desorption (TPD) analysis. The practice consists of heating silicon calibration materials at a controlled rate in a TPD instrument, measuring characteristic desorption peak temperatures, and quadratic calibration fitting the measured temperatures to standard temperatures. The calibration materials are (1) a CaC2O4?H2O pellet on Si, (2) Ar, and (3) H ion implanted into Si wafers. The st...

Abstract Fiber Bragg grating (FBG) temperature sensor and sensor arrays were applied widespread particularly in harsh environments. Although FBGs are often referring to permanent refractive index modulation in the fiber core, exposure to high-temperature environments usually results in the bleach of the refractive index modulation. The maximum temperature reported for the conventional FBG temperature sensor is around 600 degC due to its weak bonds of germanium and oxygen. In this paper, we report design and development of a novel high-temperat...

Satellite-derived land surface temperature (LST) is studied for the purpose of understanding regional skin temperature dependency and variability, and its relationship to corresponding, site-specific air temperature. Skin temperature is highly correlated with surface-air temperature although it differs depending on land surface characteristics, terrain, and atmospheric conditions on a diurnal and seasonal scale. The high temporal resolution of the Geostationary Operational Environmental Satellite (GOES) -12 sounder is used to compare the diurna...

Abstract This paper describes the design considerations of a termination for a superconducting cable, based on tapes produced with the powder-in-tube method, with a room temperature dielectric design. Most important is the optimization of the current lead that leads the current from room temperature to cryogenic temperature. The current lead is optimized, using analytical as well as numerical methods. The paper proposes a current lead made of copper, with a constant cross-section area. With an optimized length-to-cross-section area ratio, the ...

Abstract An extensometer extender has been constructed which allows the use of room-temperature extensometry for measurement of axial strain at high temperatures. The device can accept most commercial extensometers, is inexpensive to build, and easy to use. No modification of extensometer electronics are required. This paper describes the design requirements for high-temperature extensometry and shows how the present design meets these criteria. Drawings and rationale for construction are given so that the device may be easily modified for spe...

Abstract Not Available

This simple science experiment lets you make a quick batch of ice cream, & then explore the reason w...

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High temperature superconductors - with J.G. Bernodz

, since they result from changes in the amount of energy leaving earth, have been caused by greenhou...

of the thermodynamics of the greenhouse effect (especially as they apply to planetary geophysics) yo...

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The Néel temperature or magnetic ordering temperature , TN,...

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