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Arctic Sea Ice Variations in the First Half of the 20th Century:A New Reconstruction Based on Hydrometeorological Data

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Advances in Atmospheric Sciences 2024年第8期41卷 1483-1495,1686-1693页

作者： vladimir A.semenov Tatiana A.ALDONINA Fei LI Noel Sebastian KEENLYSIDE Lin WANG A.M.Obukhov Institute of Atmospheric Physics RAS Moscow 119017Russia Institute of Geography RAS Moscow 119017Russia Geophysical Institute University of Bergen and Bjerknes Centre for Climate ResearchBergen 5007Norway Nansen Environmental and Remote Sensing Center Bergen 5007Norway Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

The shrinking Arctic sea-ice area(SIA) in recent decades is a striking manifestation of the ongoing climate *** of the Arctic sea ice have been continuously observed by satellites since 1979, relatively well monitored since the 1950s, but are highly uncertain in the earlier period due to a lack of observations. Several reconstructions of the historical gridded sea-ice concentration(SIC) data were recently presented based on synthesized regional sea-ice observations or by applying a hybrid model–empirical approach. Here, we present an SIC reconstruction for the period1901–2019 based on established co-variability between SIC and surface air temperature, sea surface temperature, and sea level pressure patterns. The reconstructed sea-ice data for March and September are compared to the frequently used Had ISST1.1 and SIBT1850 datasets. Our reconstruction shows a large decrease in SIA from the 1920 to 1940 concurrent with the Early 20th Century Warming event in the Arctic. Such a negative SIA anomaly is absent in Had ISST1.1 data. The amplitude of the SIA anomaly reaches about 0.8 mln km^(2) in March and 1.5 mln km^(2) in September. The anomaly is about three times stronger than that in the SIBT1850 dataset. The larger decrease in SIA in September is largely due to the stronger SIC reduction in the western sector of the Arctic Ocean in the 70°–80°N latitudinal zone. Our reconstruction provides gridded monthly data that can be used as boundary conditions for atmospheric reanalyses and model experiments to study the Arctic climate for the first half of the 20th century.

关键词： Arctic sea ice Arctic climate early 20th century warming climate variability

Development of the Polystyrene Scintillator Technology and Particle Detectors on Their Base

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Journal of Physical Science and Application 2015年第1期5卷 6-13页

作者： vladimir Rykalin Valery Brekhovskikh Sergey Chernichenko AlexandreGorin Vitaliy semenov State Research Center of Russian Federation Institute for High Energy Physics Prolvino142281 Russia

The new designed at Institute for High Energy Physics （IHEP） technologies ot polystyrene sclntmatol~ ll,aJJu,a 5, molding of polystyrene granules under pressure, melting of granules in forms with mirrors wails, production of scintillating granules and detectors on their basis are considered. The main characteristics of the polystyrene scintillators produced by a method of large-block polymerization and a method of extruding of scintillation strips from polymerized blocks are provided in this article also.

关键词： Polystyrene scintillators melting technology "bulk" type counters.

Optimization of an Underwater Wireless Sensor Network Architecture with Wave Glider as a Mobile Gateway

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Journal of Marine Science and Application 2022年第2期21卷 179-196页

作者： Tatiana A.Fedorova vladimir A.Ryzhov Nikolay N.semenov Shaharin A.Sulaiman Department of Applied Mathematics and Mathematical Modeling Saint-Petersburg State Marine Technical University3 LotsmanskayaSaint Petersburg 190121Russia Department of Marine Information Systems and Technologies Saint-Petersburg State Marine Technical University3 LotsmanskayaSaint Petersburg 190121Russia Department of Mechanical Engineering Universiti Teknologi PETRONAS32610 Seri IskandarMalaysia

This paper presents an original probabilistic model of a hybrid underwater wireless sensor network(UWSN),which includes a network of stationary sensors placed on the seabed and a mobile *** mobile gateway is a wave glider that collects data from the underwater network segment and retransmits it to the processing *** authors consider the joint problem of optimal localization of stationary network nodes and the corresponding model for bypassing reference nodes by a wave *** optimality of the network is evaluated according to the criteria of energy efficiency and *** influence of various physical and technical parameters of the network on its energy efficiency and on the lifespan of sensor nodes is *** analysis is carried out for networks of various scales,depending on the localization of stationary nodes and the model of bypassing the network with a wave *** a model example,the simulation of the functional characteristics of the network for a given size of the water area is carried *** is shown that in the case of a medium-sized water area,the model of“bypassing the perimeter”by a wave glider is practically feasible,energy efficient and reliable for hourly data *** the case of a large water area,the cluster bypass model becomes more efficient.

关键词： Underwater wireless sensor network(UWSN) Wave glider(WG) Sensor network architecture Mobile gateway Hydroacoustic communication

Kinetics of oxidative coupling of methane:Bridging the gap between comprehension and description

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Journal of Natural Gas Chemistry 2009年第3期18卷 273-287页

作者： Mikhail Sinev Zukhra Fattakhova vladimir Lomonosov Yurii Gordienko semenov Institute of Chemical Physics ZAO "SCHAG" Company

The development of notions about the mechanism of the oxidative coupling of methane （OCM） over oxide catalysts and corresponding progress in its kinetic description are reviewed and discussed. The latter becomes essential at the stage of scaling up and optimization of the process in pilot and industrial reactors. It is demonstrated that the main achievements in the development of kinetic models can be reached by combining the approaches conventionally used in homogeneous gas-phase kinetics and in heterogeneous catalysis. In particular, some important features of the OCM process can be described if several elementary reactions of free radical species （formation and transformation） with surface active sites are included into the detailed scheme of methane oxidation in gas. However, some important features, such as a non-additive character of the reciprocal influence of methane and ethane in the case of their simultaneous presence in the reaction mixture, cannot yet be described and comprehended in the framework of schemes developed so far. Possible ways towards an advanced kinetic model, accounting the main principles of catalyst functioning （redox nature of active sites） and pathways of product formation （via free radicals） are traced.

关键词： natural gas methane oxidative coupling of methane ethane ethylene kinetics mechanism rate equations

Technological parameters of thin-film pulsed laser scribing for perovskite photovoltaics

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Clean Energy 2024年第3期8卷 127-135页

作者： Rustam Ishteev Pavel Gostishchev Mariia Tiukhova Anton Sorokin Arthur Ishteev vladimir Kondratenko Laboratory of Precision Machining of Materials Department of NanoelectronicsInstitute for Advanced Technologies and Industrial ProgrammingRTU MIREAMoscowRussia Research and Practical Clinical Center for Diagnostics and Telemedicine Technologies of the Moscow Health Care Department MoscowRussia Laboratory of Advanced Solar Energy(LASE) National University of Science and Technology MISIS4 Leninsky St.MoscowRussia semenov Federal Research Center of Chemical Physics Russian Academy of Sciences(RAS)4 Kosygina str.MoscowRussia

Over the past decade,the power conversion efficiency of halide perovskite solar cells has shown a rapid increase to 26.1%.The significant efficiency growth and the relative simplification of the technology for obtaining thin-film solar cells due to liquid printing methods determine the high potential for the low-cost perovskite solar cells ***,efficient use of cell geometry is comparable to the size of standard crystalline-Si wafers(156:156 mm and more).Therefore,modular geometry similar to amorphous-Si solar cell approaches is used to scale perovskite solar *** electrical connection of thin-film cells requires precise processing of the conductive layers that form the device p-i-n *** subject of research is the development of a full pulsed laser scribing cycle for inverted perovskite solar *** this work,we propose a study of a laser-patterning technology In_(2)O_(3):SnO_(2)(ITO)conductive layer and a photoactive perovskite layer Cs0,2(CH(NH_(2))_(2))_(0,8)PbI_(3).Process regimes of transparent conducting electrodes based on ITO and halide perovskite layer Cs_(0,2)(CH(NH_(2))_(2))_(0,8)PbI_(3)laser patterning were *** optimal parameters for the multipass mode processing of ITO and perovskite layer were *** cell was electrically isolated at a scribe line width of 30μm.

关键词： patterning perovskite solar cell perovskite solar cell photovoltaics scribing

Ignition of nanothermites by a laser diode pulse

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Defence Technology（防务技术） 2022年第2期18卷 194-204页

作者： Alexander Yu.Dolgoborodov vladimir G.Kirilenko Michael A.Brazhnikov Leonid I.Grishin Michael L.Kuskov Georgii E.Valyano Joint Institute for High Temperatures Russian Academy of SciencesRussia N.semenov Federal Research Center for Chemical Physics Russian Academy of SciencesRussia National Research Nuclear University MEPhI Moscow Russia

Experimental investigation has been carried out for laser ignition and combustion of nanothermites based on aluminum and oxides of copper,bismuth and *** mixing of nanosized powders was used to produce *** thermite ignition,initiating laser pulse with a maximum intensity of 770 W/cm2 was generated by a laser diode with a wavelength of 808 *** ignition delay times,the minimum initiation energy density,and the average burning rate at various thermite densities and mass fractions of components were determined by recording the emission of radiation of the reaction products using a multichannel pyrometer jointly with a high-speed video *** effect of adding carbon black on the threshold parameters of a laser pulse was also *** on the obtained results,certain assumptions were put forward with regard to the mechanism of nanothermites’ignition by laser radiation and their *** particular,the assumptions were made on the two-stage process of the reaction initiation and jet burning mechanism of porous nanothermites.

关键词： Nanothermites Laser ignition Burning rate Ignition delay

Influence of monovalent Bi^+doping on real composition,point defects,and photoluminescence in TlCdCl3 and TlCdI3 single crystals

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Science China Materials 2017年第12期60卷 1253-1263页

作者： Daria N.Vtyurina Polina A.Eistrikh-Geller Galina M.Kuz mlcheva Victor B.Rybakov Evgeny V.Khramov Irina A.Kaurova Dmitry Yu.Chernyshov vladimir N.Korchak semenov Institute of Chemical Physics Russian Academy of SciencesMOSCOW 119991Russia Institute of Fine Chemical Technologies Moscow Technological UniversityMoscow 119571Russia Lomonosov State University Moscow 119992Russia National Research Center《Kurchatov Instituters》 Moscow 123182Russia Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility Grenoble 38000France

The structural features and real compositions with point defects of Bi+-doped TlCdCl_3 and TlCdI_3 single crystals, grown by the Bridgman-Stockbarger technique, are first studied using the X-ray diffraction, X-ray synchrotron radiation, and EXAFS/XANES spectroscopy. In the structures of Bi^+-doped TlCdCl_3 and TlCdI_3 crystals, the Cd, Cl, and I sites are found to be defect-free. The vacancies in the Tl sites and interstitial Bi atoms located in the vicinity of the Tl sites are detected in the structures of both samples. In the Bi^+-doped TlCdCl_3, the presence of a small amount of Bi^+ ions in the Tl^+ sites is possible. The correlation between photoluminescence bands and point defects in the refined structures are determined. Photoluminescence spectra and decay kinetics of the Bi+-doped TlCdCl_3 and TlCdI_3 demonstrate that they are attractive materials for potential applications in photonics.

关键词： single crystal growth doping crystal structure point defects photoluminescence

Facile Synthesis of Amino Acid Decorated Water-Soluble Fullerene Derivatives with Anti-influenza Activity

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Chinese Journal of Chemistry 2023年第15期41卷 1803-1808页

作者： Valeriya S.Bolshakova Ekaterina O.Sinegubova Yana L.Esaulkova Alexander S.Peregudov Ekaterina A.Khakina Nikita A.Slesarenko Alexander F.Shestakov vladimir V.Zarubaev Pavel A.Troshin Olga A.Kraevaya Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of RAS Academician Semenov ave.1Chernogolovka142432Russia Higher Chemical College of RAS D.1.Mendeleev University of Chemical Technology of RussiaMiusskaya square 9Moscow125047Russia St.Petersburg Pasteur Institute Mira st.14St.Petersburg197101Russia A.N.Nesmeyanov Institute of Organoelement compounds of RAS Vavylova St.28B-334Moscow119991Russia National Research University Higher School of Economics Vavylova St.7Moscow101000Russia Department of Fundamental Physics&Chemical Engineering M.V.Lomonosov Moscow State UniversityLeninskie Gory 1/51Moscow119991Russia Zhengzhou Research Institute Harbin Institute of TechnologyLongyuan East 7th 26Jinshui DistrictZhengzhouHenan 450003China Harbin Institute of Technology West Dazhi Street 92Nan Gang DistrictHarbinHeilongjiang 150001China

Comprehensive Summary Herein,we present a facile synthesis of amide-type water-soluble fullerene derivatives decorated with five residues of amino *** compared to the previously developed approaches,the proposed method enables usage of a broad range of amino acids,including those unstable under Friedel-Crafts reaction ***,it is fully tolerant to the nature of the sixth addend X in C60R5X precursor compounds and allows one to obtain fullerene derivatives with X=Cl,H,*** synthesized amide-type water-soluble fullerene derivatives demonstrated promising antiviral activities against rimantadine-resistant influenzaА/Puerto Rico/8/34(Н1N1)virus in vitro.

关键词： Fullerenes Amino acids Regioselectivity Water-solublel Influenza Antiviral

一种搭载移动网关的混合水下声学传感网络节能可靠部署模型（英文）

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Journal of Marine Science and Application 2024年第4期 960-983页

作者： Tatiana A.Fedorova vladimir A.Ryzhov Kirill S.Safronov Nikolay N.semenov Shaharin A.Sulaiman Department of Applied Mathematics and Mathematical Modeling Saint Petersburg State Marine Technical University Department of Marine Information Systems and Technologies Saint Petersburg State Marine Technical University Department of Mechanical Engineering Universiti Teknologi PETRONAS

This work proposes an innovative approach to evaluate the functional characteristics of a heterogeneous underwater wireless acoustic sensor network(UWASN) using a stochastic model and the network connectivity criterion. The connectivity criterion is probabilistic and considers inherently distinct groups of parameters: technical parameters that determine the network function at specific levels of the communication stack and physical parameters that describe the environment in the water area. The proposed approach enables researchers to evaluate the network characteristics in terms of energy efficiency and reliability while considering specific network and environmental parameters. Moreover, this approach is a simple and convenient tool for analyzing the effectiveness of protocols in various open systems interconnection model levels. It is possible to assess the potential capabilities of any protocol and include it in the proposed model. This work presents the results of modeling the critical characteristics of heterogeneous three-dimensional UWASNs of different scales consisting of stationary sensors and a wave glider as a mobile gateway, using specific protocols as examples. Several alternative routes for the wave glider are considered to optimize the network's functional capabilities. Optimal trajectories of the wave glider's movement have been determined in terms of ensuring the efficiency and reliability of the hybrid UWASN at various scales. In the context of the problem, an evaluation of different reference node placement was to ensure message transmission to a mobile gateway. The best location of reference nodes has been found.

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