The inapplicability of previous model VPA with XSA for assessment of Greenland halibut (Reinhardtius hippoglossoides) is discussed. The Schaefer production model is suggested. Calculations of the ...Barents Sea halibut stock based on this model is presented.
We consider the possibility of realizing a terahertz spectrometer using the radiation sources based on quantum cascade lasers and the receiving system based on hot-electron bolometers. Precision ...measurements of the amplitude and phase noise of the quantum cascade lasers in this frequency range are performed. The systems for stabilizing the frequency of the quantum cascade laser are described. The diagrams of the high-resolution terahertz spectrometers are presented.
Potential problems of the MBIR multipurpose, research, fast reactor, currently under construction, in the validation of new nuclear-power projects with fast reactors and a closed nuclear fuel cycle ...are discussed. The basic characteristics and experimental possibilities of the reactor are described. Considerable attention is given to the primary directions of research on nuclear safety, reactor and structural materials science, and NFC closure. Proposals for the development of an MBIR-based international research center are given.
Results of an experimental study of the noise temperature (
T
n
) and noise bandwidth (NBW) of the superconductor NbN hot-electron bolometer (HEB) mixer as a function of its temperature (
T
b
) are ...presented. It was determined that the NBW of the mixer is significantly wider at temperatures close to the critical ones (
T
c
) than are values measured at 4.2 K. The NBW of the mixer measured at the heterodyne frequency of 2.5 THz at temperature
T
b
close to
T
c
was ~13 GHz, as compared with 6 GHz at Tb = 4.2 K. This experiment clearly demonstrates the limitation of the thermal flow from the NbN bridge at
T
b
≪
T
c
for mixers manufactured by the in situ technique. This limitation is close in its nature to the Andreev reflection on the superconductor/ metal boundary. In this case, the noise temperature of the studied mixer increased from 1100 to 3800 K.
It is determined that ultradisperse activated batches obtained by wet milling in a planetary mill are effective for synthesizing low-alkaline borosilicate glasses (Pyrex type). The positive effect is ...attained, first and foremost, by intensifying the stages of glass formation—dissolution of free silica. The glassmaking temperature can be lowered by 100 – 150°C.
•LEND/LRO instrument neutron counting data sets have been analyzed to create high resolution maps of epithermal neutron flux at polar regions of the Moon.•The conversion from epithermal neutron flux ...to the H/H2O abundances is presented based on the simple subsurface models.•The polar lunar maps (poleward 70S/70N) of homogeneous hydrogen distribution are derived and discussed.
We present a method of conversion of the lunar neutron counting rate measured by the Lunar Reconnaissance Orbiter (LRO) Lunar Exploration Neutron Detector (LEND) instrument collimated neutron detectors, to water equivalent hydrogen (WEH) in the top ∼1m layer of lunar regolith. Polar maps of the Moon's inferred hydrogen abundance are presented and discussed.
Observations of the hard X-ray and radio event of October 27, 2002 are analyzed. This flare was observed from near-Martian orbit by the HEND instrument developed at the Space Research Institute of ...the Russian Academy of Sciences and installed on the Mars Odyssey satellite. Although this powerful flare was observed far over the eastern solar limb, the extended source associated with the flare was detected by RHESSI at energies up to about 60 keV. The eruptive event was observed in the radio at the Nobeyama Radio Observatory. The properties of the X-ray radiation are used to calculate the spectrum of the accelerated electrons responsible for the observed radiation, assuming that the target is thick for a Martian observer and thin for a terrestrial observer. The results are compared with the results of radio observations. The conditions for electron propagation in the corona are discussed.
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