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  • 1
    Online Resource
    Online Resource
    A new imaging concept in spin polarimetry based on the spin-filter effect
    International Union of Crystallography (IUCr) ; 2021
    In:  Journal of Synchrotron Radiation Vol. 28, No. 3 ( 2021-05-01), p. 864-875
    Details
    In: Journal of Synchrotron Radiation, International Union of Crystallography (IUCr), Vol. 28, No. 3 ( 2021-05-01), p. 864-875
    Abstract: The concept of an imaging-type 3D spin detector, based on the combination of spin-exchange interactions in the ferromagnetic (FM) film and spin selectivity of the electron–photon conversion effect in a semiconductor heterostructure, is proposed and demonstrated on a model system. This novel multichannel concept is based on the idea of direct transfer of a 2D spin-polarized electron distribution to image cathodoluminescence (CL). The detector is a hybrid structure consisting of a thin magnetic layer deposited on a semiconductor structure allowing measurement of the spatial and polarization-dependent CL intensity from injected spin-polarized free electrons. The idea is to use spin-dependent electron transmission through in-plane magnetized FM film for in-plane spin detection by measuring the CL intensity from recombined electrons transmitted in the semiconductor. For the incoming electrons with out-of-plane spin polarization, the intensity of circularly polarized CL light can be detected from recombined polarized electrons with holes in the semiconductor. In order to demonstrate the ability of the solid-state spin detector in the image-type mode operation, a spin detector prototype was developed, which consists of a compact proximity focused vacuum tube with a spin-polarized electron source [ p -GaAs(Cs,O)], a negative electron affinity (NEA) photocathode and the target [semiconductor heterostructure with quantum wells also with NEA] . The injection of polarized low-energy electrons into the target by varying the kinetic energy in the range 0.5–3.0 eV and up to 1.3 keV was studied in image-type mode. The figure of merit as a function of electron kinetic energy and the target temperature is determined. The spin asymmetry of the CL intensity in a ferromagnetic/semiconductor (FM-SC) junction provides a compact optical method for measuring spin polarization of free-electron beams in image-type mode. The FM-SC detector has the potential for realizing multichannel 3D vectorial reconstruction of spin polarization in momentum microscope and angle-resolved photoelectron spectroscopy systems.
    Type of Medium: Online Resource
    ISSN: 1600-5775
    URL: Article
    DOI: 10.1107/S1600577521002307
    Language: Unknown
    Publisher: International Union of Crystallography (IUCr)
    Publication Date: 2021
    detail.hit.zdb_id: 2021413-3
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  • 2
    Online Resource
    Online Resource
    Parylene-based memristive crossbar structures with multilevel resistive switching for neuromorphic computing
    IOP Publishing ; 2022
    In:  Nanotechnology Vol. 33, No. 25 ( 2022-06-18), p. 255201-
    Details
    In: Nanotechnology, IOP Publishing, Vol. 33, No. 25 ( 2022-06-18), p. 255201-
    Abstract: Currently, there is growing interest in wearable and biocompatible smart computing and information processing systems that are safe for the human body. Memristive devices are promising for solving such problems due to a number of their attractive properties, such as low power consumption, scalability, and the multilevel nature of resistive switching (plasticity). The multilevel plasticity allows memristors to emulate synapses in hardware neuromorphic computing systems (NCSs). The aim of this work was to study Cu/poly- p -xylylene(PPX)/Au memristive elements fabricated in the crossbar geometry. In developing the technology for manufacturing such samples, we took into account their characteristics, in particular stable and multilevel resistive switching (at least 10 different states) and low operating voltage ( 〈 2 V), suitable for NCSs. Experiments on cycle to cycle (C2C) switching of a single memristor and device to device (D2D) switching of several memristors have shown high reproducibility of resistive switching (RS) voltages. Based on the obtained memristors, a formal hardware neuromorphic network was created that can be trained to classify simple patterns.
    Type of Medium: Online Resource
    ISSN: 0957-4484 , 1361-6528
    URL: Article
    DOI: 10.1088/1361-6528/ac5cfe
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1362365-5
    SSG: 11
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  • 3
    Online Resource
    Online Resource
    CONCEPT OF TECHNOGENIC RISK MANAGEMENT
    Federal Scientific Center for Hygiene F.F.Erisman ; 2019
    In:  Hygiene and sanitation Vol. 96, No. 8 ( 2019-03-27), p. 780-785
    Details
    In: Hygiene and sanitation, Federal Scientific Center for Hygiene F.F.Erisman, Vol. 96, No. 8 ( 2019-03-27), p. 780-785
    Abstract: There are proposed conceptual positions and levels of decision-making on provision of the safety, social and medical protection of the human on the base of the assessment, analysis and risk management in different areas of human activity in normal and emergency conditions under the exposure to man-made and some natural hazard sources. At the base of developed applications there is a unified approach to the development and use of modern risk assessment methodology: the elaboration of a common method of the risk assessment and, basing on it, specific and simplified methods for concrete sources of hazard impact. This structure of methodological bases of risk assessment, in its full development makes it more transparent and comparable as well specific methods, as the support of decision-making on protective and other measures from different sources of danger. There were formulated proposals for universal safety standards (SSs) and other levels of decision-making on safety, social and medical protection of the population and staff of hazardous industries, including acceptable levels of risk. For the establishment of SSs and other decision-making levels, a special risk index is used: the relative damage (ratio of years of life lost to a year of stay-at-risk). This index is most appropriate for evaluation, comparison and management of risk, especially in conditions of two or more acting danger sources. On the base of universal SSs there are developed branch main SSs for certain isolated sources of danger. They are expressed in those indices (specific risk indices or impact indices in their different definitions), which by now are widely used in the practice or will be chosen for practical use in the future. In the ensuring human safety in normal conditions, the main use of the risk assessment is the development and support of SSs and other levels of decision-making. In emergencies the specific risk assessment besides to the establishment the decision-making levels is essentially needed to make justified optimal decisions on the measures of social and medical protection of the population and professionals.
    Type of Medium: Online Resource
    ISSN: 2412-0650 , 0016-9900
    URL: Article
    DOI: 10.18821/0016-9900-2017-96-8-780-785
    Language: Unknown
    Publisher: Federal Scientific Center for Hygiene F.F.Erisman
    Publication Date: 2019
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  • 4
    Online Resource
    Online Resource
    Accumulation of Silver Nanoparticles in Brain and Testes during Long-Term Ingestion to Mammals
    Trans Tech Publications, Ltd. ; 2017
    In:  Nano Hybrids and Composites Vol. 13 ( 2017-1), p. 199-205
    Details
    In: Nano Hybrids and Composites, Trans Tech Publications, Ltd., Vol. 13 ( 2017-1), p. 199-205
    Abstract: Using of silver nanoparticles in consumer goods and in medicine gives big benefits, but there is also the problem of their toxicity for health and environment. There is a lot of literature on experiments with absorption, biodistribution, metabolism and excretion (ADME) of silver nanoparticles in living organisms, but low information exists yet on their accumulation in various biological organs of mammals. Previous experiments have indicated a low clearance of silver nanoparticles from organs, which have histochematic barriers, e.g brain, testes. This article reports the results of three month experiment with daily ingestion of silver nanoparticles to growing male Wistar rats. Experiment was aimed to measure silver mass accumulated in rat's brain and testes under various daily doses. The experiment shows that these organs accumulate silver nanoparticles. Сoncentration of silver nanoparticles in brain and testes after three month of daily ingestion shows dozens times increase compared to single ingestion of daily dose. The experiment demonstrates that accumulation of silver nanoparticles in brain and testes depends on value of daily dose of the nanoparticles. This dependence in brain differs from the same dependence in testes which demonstrate effect of “saturation” or less accumulation with increasing of daily dose. The results of the experiment are of great importance for estimation of toxicity of silver nanoparticles for mammals, developing of regulation documents on using of Ag NPs and for targeted transportation of pharmaceutical drugs.
    Type of Medium: Online Resource
    ISSN: 2297-3400
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/NHC.13
    DOI: 10.4028/www.scientific.net/NHC.13.199
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2017
    detail.hit.zdb_id: 2862151-7
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  • 5
    Online Resource
    Online Resource
    30 kV Pulse Diode Stack Based on 4H-SiC
    Trans Tech Publications, Ltd. ; 2018
    In:  Materials Science Forum Vol. 924 ( 2018-6), p. 841-844
    Details
    In: Materials Science Forum, Trans Tech Publications, Ltd., Vol. 924 ( 2018-6), p. 841-844
    Abstract: The paper reports on the studies of static and dynamic characteristics of 30 kV diode stacks based on 4H-SiC drift step recovery diodes (DSRDs). It was found that the optimal performance in terms of blocking voltage and switching speed can be achieved with 2 kV DSRD dies. Fifteen 2 kV DSRD dies were connected in series and sealed with molding compound. The stacks were dynamically tested in a special oscillator circuit. Repetitive voltage pulses of 30.5 kV with the leading edge of 1.6 ns were demonstrated.
    Type of Medium: Online Resource
    ISSN: 1662-9752
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/MSF.924
    DOI: 10.4028/www.scientific.net/MSF.924.841
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2018
    detail.hit.zdb_id: 2047372-2
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  • 6
    Online Resource
    Online Resource
    Developmental stability and population dynamics of shrew Sorex in central Siberia
    Mammal Research Institute ; 1997
    In:  Acta Theriologica Vol. 42 ( 1997-12-30), p. 41-48
    Details
    In: Acta Theriologica, Mammal Research Institute, Vol. 42 ( 1997-12-30), p. 41-48
    Type of Medium: Online Resource
    ISSN: 0001-7051 , 2190-3743
    URL: Journal
    URL: Article
    DOI: 10.4098/0001-7051
    DOI: 10.4098/AT.arch.97-45
    RVK:
    WA 15000
    Language: Unknown
    Publisher: Mammal Research Institute
    Publication Date: 1997
    detail.hit.zdb_id: 2808353-2
    detail.hit.zdb_id: 2269537-0
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    ALGORITHM OF DECISION-MAKING ON SOCIAL AND MEDICAL PROTECTION IN EMERGENCY SITUATION
    Federal Scientific Center for Hygiene F.F.Erisman ; 2019
    In:  Hygiene and sanitation Vol. 98, No. 1 ( 2019-03-27), p. 11-16
    Details
    In: Hygiene and sanitation, Federal Scientific Center for Hygiene F.F.Erisman, Vol. 98, No. 1 ( 2019-03-27), p. 11-16
    Abstract: The aim of the study. The development of decision-making algorithm for decisions on the social and medical protection of people in emergency situations based on risk analysis. Material and methods. The problems and conceptual provisions of risk assessment and decision-making, based on its results, are described concerning the social and medical protection of personnel of hazardous industries and the population in the event of an emergency situation (ES) in which the level of exposure to hazardous factors may exceed the established safety standards. The object of risk assessment and analysis are stochastic (probabilistic) effects of exposure to ES hazard factors. Their main features, which create complex problems in risk assessment and making decisions on protective measures, is the non-specific effects of the hazardous factors’ impact on human health and their possible latency. Results. The first step before decisions on the protective measures should be to identify a high-risk group among people affected by ES, based on the risk assessment. Three variants of decision-making for the high-risk group are considered: 1) financial compensation for risk, 2) medical measures for protecting health and 3) compensation for the realized damage to health. The requirements of the risk assessment methodology are formulated. Discussion. It is shown that the first option can not provide optimal and justified protection of the health and well-being of people in ES. Decisions on this protection are proposed to be based on a combination of options 2) and 3). The choice of the optimal combination depends on the specific situation and development of emergencies, on the success of implementing engineering and organizational protective measures aimed at preventing "doses" of exposure to people of hazardous factors of the emergency above the established safety limits and on the effectiveness and timeliness of medical protection. Conclusion. The choice of the option of making an effective decision on social and medical protection should be based on the detailed risk assessment from the exposure to hazardous factors, including risk assessment in economic indicators.
    Type of Medium: Online Resource
    ISSN: 2412-0650 , 0016-9900
    URL: Article
    DOI: 10.18821/0016-9900-2019-98-1-11-16
    Language: Unknown
    Publisher: Federal Scientific Center for Hygiene F.F.Erisman
    Publication Date: 2019
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  • 8
    Online Resource
    Online Resource
    JUNO sensitivity to 7 Be, pep, and CNO solar neutrinos
    IOP Publishing ; 2023
    In:  Journal of Cosmology and Astroparticle Physics Vol. 2023, No. 10 ( 2023-10-01), p. 022-
    Details
    In: Journal of Cosmology and Astroparticle Physics, IOP Publishing, Vol. 2023, No. 10 ( 2023-10-01), p. 022-
    Abstract: The Jiangmen Underground Neutrino Observatory (JUNO), the first multi-kton liquid scintillator detector, which is under construction in China, will have a unique potential to perform a real-time measurement of solar neutrinos well below the few MeV threshold typical of Water Cherenkov detectors. JUNO's large target mass and excellent energy resolution are prerequisites for reaching unprecedented levels of precision. In this paper, we provide estimation of the JUNO sensitivity to 7 Be, pep , and CNO solar neutrinos that can be obtained via a spectral analysis above the 0.45 MeV threshold. This study is performed assuming different scenarios of the liquid scintillator radiopurity, ranging from the most optimistic one corresponding to the radiopurity levels obtained by the Borexino experiment, up to the minimum requirements needed to perform the neutrino mass ordering determination with reactor antineutrinos — the main goal of JUNO. Our study shows that in most scenarios, JUNO will be able to improve the current best measurements on 7 Be, pep , and CNO solar neutrino fluxes. We also perform a study on the JUNO capability to detect periodical time variations in the solar neutrino flux, such as the day-night modulation induced by neutrino flavor regeneration in Earth, and the modulations induced by temperature changes driven by helioseismic waves.
    Type of Medium: Online Resource
    ISSN: 1475-7516
    URL: Article
    DOI: 10.1088/1475-7516/2023/10/022
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2104147-7
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  • 9
    Online Resource
    Online Resource
    Fluorinated graphene nanoparticles with 1–3 nm electrically active graphene quantum dots
    IOP Publishing ; 2020
    In:  Nanotechnology Vol. 31, No. 29 ( 2020-05-01), p. 295602-
    Details
    In: Nanotechnology, IOP Publishing, Vol. 31, No. 29 ( 2020-05-01), p. 295602-
    Type of Medium: Online Resource
    ISSN: 0957-4484 , 1361-6528
    URL: Article
    DOI: 10.1088/1361-6528/ab83b8
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 1362365-5
    SSG: 11
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  • 10
    Online Resource
    Online Resource
    Sub-percent precision measurement of neutrino oscillation parameters with JUNO*
    IOP Publishing ; 2022
    In:  Chinese Physics C Vol. 46, No. 12 ( 2022-12-01), p. 123001-
    Details
    In: Chinese Physics C, IOP Publishing, Vol. 46, No. 12 ( 2022-12-01), p. 123001-
    Abstract: JUNO is a multi-purpose neutrino observatory under construction in the south of China. This publication presents new sensitivity estimates for the measurement of the , , , and oscillation parameters using reactor antineutrinos, which is one of the primary physics goals of the experiment. The sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site, the nuclear reactors in the surrounding area and beyond, the detector response uncertainties, and the reactor antineutrino spectral shape constraints expected from the TAO satellite detector. It is found that the and oscillation parameters will be determined to 0.5% precision or better in six years of data collection. In the same period, the parameter will be determined to about % precision for each mass ordering hypothesis. The new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.
    Type of Medium: Online Resource
    ISSN: 1674-1137 , 2058-6132
    URL: Article
    DOI: 10.1088/1674-1137/ac8bc9
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2491278-5
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