To compensate for the temperature dependency of a standard FBG, a cladding-etched FBG immersed with a liquid mixture having a negative thermo-optic coefficient is presented, and its characteristics are investigated. The Bragg wavelength of the cladding-etched FBG is shifted counter to the direction of the Bragg wavelength shift of a conventional FBG according to the mixing ratio of glycerin to ...

We are testing a high-resolution ultrasonic thermometer with a noise floor at the μK level to improve the accuracy of radiation dosimetry methods that rely upon water calorimetry as a primary standard. Conventional water calorimeters, based upon the original design of Domen, detect temperature changes in irradiated water with thermistors that are sealed inside a thin sheath of glass. Recovering...

A precision thermistor bridge and thermistor is described for use ina thermaltitration calorimeteror a high-speed stoppedor continuous-flow calorimeter of the Roughton type. These are compared and evaluated with regard to several other types of detectors, including the platinum resistance thermometer, thermocouple, transistor thermometer, and capacitance thermometers. At this time the best dete...

Temperature measurement is an important link in industrial production, also an important part of modern testing technology. The traditional single bridge circuit is already unable to meet the requirements of modern precise temperature measurement system on temperature measurement. The relation between the output voltage of general Wheatstone bridge and real strain is nonlinear. The nonlinear er...

In this article, the temperature behavior of output power of superluminescent light-emitting diode (SLED) by considering the effect of non-radiative recombination coefficient, non-radiative spontaneous emission coefficient and Auger recombination coefficients has been investigated. For this aim, GaN pyramidal quantum dots were used as the active region. The numerical method has been used to sol...

The use of small thermistors coated with absorbing material for the measurement of ultrasound fields is discussed. Equilibrium temperature rise gives a rough measure of intensity, but is affected by convective cooling due to streaming. The initial rate of temperature rise provides an accurate parameter for use in assessing energy density in all types of ultrasound field. Measurements made in st...

The evidence for the importance of the hypothalamus in hibernationin mammals was reviewed recently by Mrosovsky 3. The role played by anterior hypothalamic and preoptic areas in the regulation of body temperature in non-hibernators is well known; a few studies seem to indicate that these areas are important in hibernators as well. Satinoff4, 5 found that ground squirrels, made hypothermic by hy...

A method is described for measurement of cerebral blood flow utilizing the washout of microwave delivered heating. Using a microwave source attenuated to achieve a brain temperature elevation of 0.5-0.75 degrees C after a 2 second exposure in the rat, cerebral blood flow was calculated from the temperature washout curve monitored by a small thermistor implanted in the brain. The results obtaine...

Multiferroics represent a class of advanced materials for promising applications and stand at the forefront modern science special feature possessing both charge polar magnetic order. Previous studies indicate that family RECrO3 (RE = rare earth) compounds is likely another candidate system holding ferroelectricity magnetism. However, many issues remain unsolved, casting hot disputes about whet...