The device, the principle of operation and the test results of the apparatus for cryogenic freezing of oils designed to isolate impurities characterized by a high-melting state under atmospheric ...environmental parameters are considered. It was found that in the mode of extracting wax substances and phospholipids with an average rate of bubbling nitrogen vapor through an oil layer
w
= 2.2 m/sec, the best results for extracting impurities of wax substances and phospholipid compounds with a high-melting structure are obtained. At a higher rate of bubbling nitrogen vapor through an oil layer (
w
= 2.5 m/sec or more), the freezing process is carried out with a high cooling rate, which adversely affects the nature of the high-quality agglomeration of high molecular weight impurities containing waxy and phospholipid fractions, and the final filtrate of frozen-out oil does not fully meet the requirements of the standard for physicochemical parameters.
Intensive use of computers leads to an increase in the light load on the human body. The purpose of this research was to study the impact of the differential illumination of matrices of computer ...monitors (CM) on a melatonine-forming function, in which healthy male volunteers (average age 22.8 ± 2.09 years) took part. The light exposure was carried out by series for seven days with the help of CM, from which volunteers in the evening (from 9 pm to 11 pm) read standard text. CM had various backlit devices: Cold Cathode Fluorescent Lamp (CCFL) and White Light Emitting Diode (WLED), different color temperatures (CT). After each series, the excretion of 6-sulfatoxymelatonin (6-SOM) with urine was investigated. The peak intensity (PI) and the dominant wavelength (DW) in the WLED series, the parameters turned out to be within High Energy Visible Light (HEVL). The study revealed reliable differences in 6-SOM concentrations in different series of studies with indicators in the series with wised and CT 5512-5903 K. The research also detected correlations between the indicators 6-SOM, the values of PI (R = 0.692, p = 0.05) and the DW (R = 0.587, p = 0.01), which are in the HEVL range.
The results of testing a method for increasing the spatial resolution of satellite radiometric data in the L-band are presented. Data obtained by satellite-borne radiometer is characterized by low ...spatial resolution. The use of satellite radar data can increase the spatial resolution of radiometric images in the L-band to hundreds of meters. At the moment, the L-band radiometric data processing is possible with the use of radar data C-band. For this reason the method gives satisfactory results in the absence of cloudiness on the radar image.
The future Belle II experiment will employ a computer-farm based data reduction system for the readout of its innermost detector, a DEPFET-technology based silicon detector with pixel readout. A ...large fraction of the background hits can be rejected by defining a set of regions of interest (ROIs) on the pixel detector sensors (PXD) and then recording just the data from the pixels inside the ROI. The ROIs are defined on an event by event basis by extrapolating back onto the PXD the charged tracks detected in the outer trackers (a four-layer double-sided silicon strip detector surrounded by a wire chamber). The tracks are reconstructed in real time on the High Level Trigger (HLT). The pixel detector is then read out based on the ROI information. A demonstrator of this architecture was under beam test earlier this year in DESY (Hamburg, Germany). The demonstrator was operated in an electron beam whose momentum was in the 2-6 GeV/c range with a typical trigger rate of a few kilohertz in a magnetic field of strength up to 1 T. The demonstrator consists of one pixel sensor and four silicon strip sensors arranged in a five-layer configuration mimicking the Belle II vertex detector. The detector readout was a scaled down version of the full Belle II DAQ + HLT chain. The demonstrator was used to detect the particles, reconstruct in real time the trajectories, identify the ROIs on the PXD plane and record the PXD data within. We describe the requirements and the architecture of the final system together with the results obtained with the demonstrator.
Abstract
The directional characteristics of horizontal Hertz dipole obtained at the result of the modeling process are presented. The elementary emitter was situated near the vertically layered ...dielectric surface. The vertical heterogeneity corresponded to frozen soil covered with a layer of snow. The modeling considered two types of soils: sandy and loamy clay. We used the finite difference time domain method for modeling. It was found that snow and soil’s properties affect the directional characteristics of the dipole. These results can be used to assess the influence of the underlying surface on the directional characteristics of antennas located on the territory with season snowfall.
This paper investigates the impact of the soil moisture distribution in the top layer on the accuracy of soil moisture retrieval by microwave remote sensing methods. We modeled soil emission at ...L-band by coherent and noncoherent models for the different moisture distributions in the top layer. As a result, it is found that, at high moisture gradients, the difference between average moisture within the sensing depth at L-band and the moisture retrievable from remote sensing data can be more than 20% in absolute terms. In addition, high differences between Soil Moisture and Ocean Salinity (SMOS) Level 2 data and the in situ measurements were revealed in cases of high gradients. Such high gradients may be observed during some time in the top layer of the drying soil after rainfall. These differences are significantly more than the accuracy declared by SMOS development team. We proposed a simple method that allows the assessment of the type of soil moisture profile by SMOS and Global Change Observation Mission-Water "SHIZUKU" (GCOM-W1) satellites data. The procedure for simple processing of data of the two satellites is described. In addition, we compared the type of soil moisture profile retrieved from satellite data and the soil moisture profile found by in situ measurements.
The results of works aimed at studying the influence of a flat-layered heterogeneous medium on the type of directional pattern of elementary wave emitter are presented. It was found that a change in ...the thickness of the frozen soil layer leads to a change in the directional characteristics of elementary emitter. The largest changes in the type of radiation pattern are observed when the thickness of the frozen / thawed layer is a quarter of the wavelength in this medium. It is shown that a change in the type of radiation pattern is also associated with the radiophysical characteristics of the underlying surface on which the antenna is located. The obtained results can be used in the process of optimizing the operation of antenna-feeder devices in conditions of changing the state of the underlying surface.
The results of estimate of the effective dielectric permittivity a presented. We measured the soil moisture data in a toplayer 2 meters thick. This data used to calculate the view of depth's ...dependence of real part of the soil's complex dielectric permittivity and conductivity. We calculated of soil surface reflectivity at a frequency of 3 and 30 MHz. This data were used to estimate of the soil's effective dielectric permittivity and conductivity.
Adsorption of viral particles from the blood plasma of patients with viral hepatitis B and C on modified nanodiamonds (MNDs) was shown in the in vitro experiments. PCR method showed the treatment of ...plasma with MNDs leads to a decrease in the viral load by 2–3 orders of magnitude or more in both cases studied. These results make it possible to predict the applicability of MNDs for the development of new technologies of hemodialysis and plasmapheresis for binding and removal of viral particles from the blood of infected patients.
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