Following Grischuk and Sidorov [Phys. Rev. D 42 (1990) 3413] in putting the Bogolubov-Hawking coefficient of Schwarzschild black-holes in the squeezing perspective, we provide a short discussion of Schwarzschild black holes as radiometric standards. In this work I will give arguments in favour of taking Schwarzschild black holes (SBH) as blackbody simulators, most probably the best ones. Even b...

The purpose of the radiometer project was to research and demonstrate the working principles of a radiometer system. The radiometer design team was composed of five members, each contributing a specific component to the final system. A radiometer system is a device that detects microwave emissions from noise producing objects [1]. These noise sources are typically objects that emit heat and the...

BACKGROUND AND PURPOSE Microwave radiometry allows noninvasive in vivo measuring of internal temperature of tissues reflecting inflammation. In the present study, we evaluated the predictive accuracy of this method for the diagnosis of coronary artery disease (CAD). METHODS Consecutive patients (n=287) scheduled for coronary angiography were included in the study. In carotid arteries of both ...

Microwave radiometric method is discussed as applied to monitoring of rice growth. The following questions are considered in the paper. Modeling of microwave emission from rice fields. Experimental studies of microwave emission from rice fields. Rice biomass retrieval from microwave radiometric measurements. Examples of monitoring of rice growth with airborne and ground based radiometers.

The value of the fundamental quality in radiometry, the watt, is presently realized by electrical substitution in which the temperature produced in a blackened material due to absorption of radiant energy is balanced against that produced by electrical energy whose current and voltage can accurately be measured. A new method to measure optical radiation is being explored by the National Bureau ...

In the quantum regime information can be copied with only a finite fidelity. This fidelity gradually increases to 1 as the system becomes classical. In this Letter we show how this fact can be used to directly measure the amount of radiated power. We demonstrate how these principles can be used to build a practical primary standard.

Radiometry, simulations, and photo-polymerization case studies validate a photo-reactor platform with uniform illumination multiple wavelengths for well plates, in-plane flow reactors, droplets.

Nearly 20 years ago Quinn and Martin presented a novel blackbody design with an absorbing end face and highly reflecting side walls. This blackbody had the considerable advantage of being less sensitive to temperature gradients along the side walls (potentially of several degrees Celsius) compared to an all-black cavity. Recent work at NPL has developed this concept further, laying out the conc...