We presented the results of expedition measurements of the set of physical-chemical characteristics of atmospheric aerosol in areas of the Arctic and Far East seas, performed onboard RV Akademik ...Fedorov (17 August–22 September 2013) and RV Professor Khljustin (24 July–7 September 2013). The specific features of spatial distribution and time variations of aerosol optical depth (AOD) of the atmosphere in the wavelength range of 0.34–2.14 μm and boundary layer height, aerosol and black carbon mass concentrations, and disperse and chemical composition of aerosol are discussed. Over the Arctic Ocean (on the route of RV Akademik Fedorov) there is a decrease in aerosol and black carbon concentrations in a northeastern direction: higher values were observed in the region of Spitsbergen and near the Kola Peninsula; and minimum values were observed at northern margins of the Laptev Sea. Average AOD (0.5 μm) values in this remote region were 0.03; the aerosol and black carbon mass concentrations were 875 and 22 ng m−3, respectively. The spatial distributions of most aerosol characteristics over Far East seas show their latitudinal decrease in the northern direction. On transit of RV Professor Khljustin from the Japan Sea to the Chukchi Sea, the aerosol number concentration decreased on average from 23.7 to 2.5 cm−3, the black carbon mass concentration decreased from 150 to 50 ng m−3, and AOD decreased from 0.19 to 0.03. We analyzed the variations in the boundary layer height, measured by ship-based lidar: the average value was 520 m, and the maximal value was 1200 m. In latitudinal distribution of the boundary layer height, there is a characteristic minimum at a latitude of ~ 55° N. For water basins of eight seas, we present the chemical compositions of the water-soluble aerosol fraction (ions, elements) and small gas-phase species, as well as estimates of their vertical fluxes. It is shown that substances are mainly (75–89 %) supplied from the atmosphere to the sea surface together with gas-phase species. The deposited ions account for from 11 to 24.5 %, and trace elements account for 0.2–0.4 % of the total sum of water-soluble components. The average vertical fluxes of aerosol substance are a factor of 4–7 larger in the Japan Sea than in the water basins of Arctic seas.
SND tracking system—Tests with cosmic muons Aulchenko, V.M.; Bogdanchikov, A.G.; Botov, A.A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
2009, 2009-1-00, Letnik:
598, Številka:
1
Journal Article
Recenzirano
Tracking system of the SND detector is fully assembled, equipped and tested with cosmic muons in 2007. During these tests operation conditions of the system were checked and optimized and main ...parameters of the system were measured. Design values of gas gain, detection efficiency and space resolution were achieved. Tracking system is ready for installation into the SND detector and coming data taking at the VEPP-2000
e
+
e
-
-collider in Novosibirsk.
The article considers medical and pedagogical prevention of deviant behavior of adolescents from dysfunctional families in conditions of rural school, related to the need of strengthening targeted ...joint interaction of medical and pedagogical institutions. The description and results of testing of diagnostic tools used to establish severity of deviant behavior of children in a selected group is discussed. The interaction of medical and educational institutions in preventing deviant behavior of adolescents from dysfunctional families in rural school is of key importance for combating prevalence of drug addiction, tobacco smoking, alcohol abuse and psychoactive substances consumption, and contributing to physical and mental health promotion of younger generation, development of healthy lifestyle. The study was organized to cover cognitive, behavioral, affective and value-motivational components. The qualitative characteristics of levels of severity of deviant behavior of adolescents from dysfunctional families were developed and proposed for practice application.
Spherical neutral detector for VEPP-2M collider Achasov, M.N; Aulchenko, V.M; Baru, S.E ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
07/2000, Letnik:
449, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The Spherical Neutral Detector (SND) operates at VEPP-2M collider in Novosibirsk studying e
+e
− annihilation in the energy range up to 1.4
GeV. Detector consists of a fine granulated spherical ...scintillation calorimeter with 1632 NaI(Tl) crystals, two cylindrical drift chambers with 10 layers of sense wires, and a muon system made of streamer tubes and plastic scintillation counters. The detector design, performance, data acquisition and processing are described.
—
The dependence of the limits of detection of Mg, Mn, Sr, Pb, Al, and B in aqueous solutions on the laser pulse repetition rate is studied by femtosecond laser induced breakdown spectroscopy for the ...laser pulse repetition rate from 50 to 1000 Hz. The limit of detection is shown to be the best at a laser pulse repetition rate of 166 Hz for all the elements under study, other experimental conditions being the same.
We present the results of devising new techniques and technical means for utilizing small-sized unmanned aerial vehicles (UAVs) in ecological monitoring of marine water basins in compliance with the ...MARPOL 73/78 international convention. The development of a hardware-software complex is described for the system of recognizing oil spills using elements of artificial intelligence. The laboratory experiments on identifying oil spills by laser induced fluorescence (LIF) methods are presented, as well as the methods of recording the spectrum of upward solar radiation.
The main physical-chemical characteristics of ceramic high-porosity block-cellular catalysts coated with a palladium active layer in the process of oxidation of hydrogen under different experimental ...conditions are presented. It is concluded on the basis of the data obtained on the energy of activation and catalytic activity that in comparison with imported granular catalysts they hold promise for use in the catalytic oxidation of hydrogen isotopes.
—
Two techniques for multielement analysis of liquid-droplet aerosol are compared, which are based on the spectral analysis of the radiation of a laser plasma generated in a laser breakdown (LIBS) or ...during laser pulse filamentation in a liquid droplet aerosol (R-FIBS). A liquid-droplet aerosol containing Na solution is used. It is shown that there are optimal delay times of the start of signal recording relative to the start of plasma generation, at which the signal-to-noise ratio is maximal, for both techniques. The dependence of the signal-to-noise ratio is derived for different laser radiation focusing deep into a liquid-droplet cloud for LIBS. The Na detection limits are determined for both methods.
DAQ and electronics for SND at VEPP-2000—First test results Aulchenko, V.M.; Bogdanchikov, A.G.; Botov, A.A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
2009, 2009-1-00, Letnik:
598, Številka:
1
Journal Article
Recenzirano
The SND data acquisition system for experiments at VEPP-2000 collider is presented. Readout electronics, software architecture, key components are summarized. System was tested and used on the ...cosmics and VEPP-2000 collision events.
PDF
