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Microwave diagnostics of pulsed atmospheric discharge with electrolytic electrode and long-lived luminous formation in its afterglow

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High Voltage 2024年第1期9卷 127-136页

作者： Shixin Zhao Xingbao Lyu Aleksandr Astafiev Chengxun Yuan Lin Miao Jingfeng Yao Ying Wang Anatoly Kudryavtsev Aleksandr Chirtsov Gennadii Shabanov Zhongxiang Zhou School of Physics Harbin Institute of TechnologyHarbinChina Physics department Saint Petersburg Electrotechnical University“LETI”St.PetersburgRussia Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology HarbinChina Physics department St.Petersburg State UniversitySt.PetersburgRussia Konstantinov petersburg Nuclear Physics institute National Research Centre“Kurchatov Institute”GatchinaRussia

The Gatchina discharge phenomenon holds significant promise as a laboratory model for simulating ball ***,crucial aspects concerning the plasma components of the resulting afterglow remain ***,the measurement of the electron density,a critical parameter,has not been fully achieved thus *** this study,microwave diagnostics and video recording were employed during a pulsed Gatchina discharge,along with synchronous measurement of discharge current and *** antennas were positioned at different heights to enable separate diagnosis of the discharge and the ensuing long-lived *** findings revealed that during the active phase of the Gatchina discharge,the plasma density was substantial enough to cause reflection of an electromagnetic wave with a frequency of 20 GHz from this highly conductive *** the afterglow,the signal experienced only a moderate weakening of 10–20 percent,facilitating the determination of the time dependence of average electron density during the afterglow's passage between the two *** measurements verified the unusually slow plasma decay in the afterglow of the Gatchina discharge,suggesting the potential significance of chemi-ionisation processes involving long-lived(metastable)particles.

关键词： holds luminous electrolytic

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Comparison of extraction abilities of deep eutectic solvents and aqueous acid solutions for extraction of rare earths and transition metals

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Journal of Rare Earths 2024年第6期42卷 1157-1164,I0006页

作者： Svetlana Drogobuzhskaya Margarita Frolova Andrey Shishov Nikita Tsvetov Tananaev institute of Chemistry-Subdivision of the Federal Research Centre《Kola Science Centre of the Russian Academy of Sciences》 18420926a AcademgorodokApatityRussia Murmansk state Technical University 183010Sportivnaja str.13MurmanskRussia department of Analytical Chemistry Institute of ChemistrySaint Petersburg State UniversitySpbSU.1990347/9 Universitetskaya embSt.Petersburg Russia

In recent years,deep eutectic solvents have attracted increasing interest as effective extractants for the separation of both organic substances and metals from various ***-based deep eutectic solvents are most often used as extractants for the extraction of *** this work,for the first time,the extraction efficiency of transition metals and rare earth elements(Y,Zr,Nb,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Hf and Ta)from mining tailings and Na,K,Ca,Mg,Cu,Fe,Mn,Pb,Ba,Ni and Sr from biodiesel samples using acidic deep eutectic solvents and saturated aqueous solutions of the same acids(malonic,malic,tartaric and citric)is *** this,deep eutectic solvents based on acids and their aqueous saturated solutions were prepared and *** prepared mixtures were analyzed by IR spectroscopy to confirm the formation of eutectic *** such as the density and viscosity of the resulting mixtures were also investigated,as this can be of key importance for the efficiency of metal *** extraction of rare earth metals from mining tailings took a long time(up to several days),while the extraction of metals from fuel took no more than 30 *** emission spectral methods were used as an analysis *** is shown that the extraction efficiency with aqueous solutions is better than that with eutectic solvents,which casts doubt on the need for deep eutectic solvents use in this area.

关键词： Deepeutectic solvent Metal separation Elemental analysis Rare earth metals Biodiesel

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Liver-brain axis with alcohol:Role of fibroblast growth factor 21(FGF21)

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Genes & Diseases 2024年第2期11卷 509-511页

作者： Ke Zhang Elena Blokhina Evgeny Krupitsky Marina Vetrova Ti-Fei Yuan Hua Wang Shanghai Key Laboratory of Psychotic Disorders Brain Health InstituteNational Center for Mental DisordersShanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghai 200030China Pavlov University Valdman Institute of PharmacologySt.Petersburg 197022Russia Bekhterev National Medical Research Center for Psychiatry and Neurology St.Petersburg 192019Russia Co-innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu 226007China department of Oncology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui 230032China

Fibroblast growth factor21(FGF21)is a hormone that can balance nutrient fluctuations,control metabolic processes,and maintain energy *** FGF21 is produced by a variety of cell types,including hepatocytes,adipocytes,bone cells,myocardial cells,and pancreas cells,and act on various effector tissues such as brain,adipose tissue,liver,heart,and skeletal muscle.1 The target that FGF21 interacts with is the cell-surface receptor composed of FGF receptors in complex with the single-pass transmembrane proteinβ-*** receptors are abundantly expressed,both in peripheral tissues and some regions of the CNS,such as the hypothalamus and amygdala and the locus coeruleus(LC).2 Physiologically,FGF21 can be induced by various metabolic stresses,including hunger,protein deficiency,monosaccharides,and alcohol,by acting onβ-Klotho receptor in corresponding tissues,ultimately exerting regulatory effects(Fig.1)

关键词： Klotho homeostasis alcohol

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Author Correction: ITO-free silicon-integrated perovskite electrochemical cell for light-emission and light-detection

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Opto-Electronic Advances 2024年第3期7卷 50-50页

作者： Maria Baeva Dmitry Gets Artem Polushkin Aleksandr Vorobyov Aleksandr Goltaev Vladimir Neplokh Alexey Mozharov Dmitry VKrasnikov Albert GNasibulin Ivan Mukhin Sergey Makarov Alferov University Khlopina 8/3St.Petersburg 194021Russia department of Physics and Engineering ITMO UniversityLomonosova 9St.Petersburg 197101Russia institute of Automation and Control Processes(IACP) Far Eastern Branch of Russian Academy of SciencesUlitsa Radio 5Vladivostok 690041Primorsky KraiRussia Peter the Great st.petersburg Polytechnic University Polytechnicheskaya 29St.Petersburg 195251Russia Skolkovo institute of Science and Technology Nobel 3Moscow 121205Russia Qingdao Innovation and Development Center Harbin Engineering UniversityQingdao 266000China.

Correction to:Opto-Electronic Advances https://***/10.29026/oea.2023.220154 published online 26 April 2023 After the publication of this article1,it was brought to our attention that calculations of the PeLEC device elec-troluminescent(EL)efficiency contained a mistake,leading to an inaccurate quantity *** device’s maxim-um EL efficiency constitutes not‘~120 klm/W’but‘4.3 lm/W’*** details are listed below.

关键词： value. perovskite listed

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Polariton lasing in Mie-resonant perovskite nanocavity

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Opto-Electronic Advances 2024年第4期7卷 27-42页

作者： Mikhail A.Masharin Daria Khmelevskaia Valeriy I.Kondratiev Daria I.Markina Anton D.Utyushev Dmitriy M.Dolgintsev Alexey D.Dmitriev Vanik A.Shahnazaryan Anatoly P.Pushkarev Furkan Isik Ivan V.Iorsh Ivan A.Shelykh Hilmi V.Demir Anton K.Samusev Sergey V.Makarov UNAM-institute of Materials Science and Nanotechnology National Nanotechnology Research CenterDepartment of Electrical and Electronics EngineeringDepartment of PhysicsBilkent UniversityAnkara 06800Turkey ITMO University School of Physics and EngineeringSt.Petersburg 197101Russia Abrikosov Center for Theoretical Physics MIPTDolgoprudnyiMoscow Region 141701Russia LUMINOUS!Center of Excellence for Semiconductor Lighting and Displays School of Electrical and Electronic EngineeringSchool of Physical and Mathematical SciencesSchool of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore department of Physics Engineering Physics and AstronomyQueen’s UniversityKingstonOntario K7L 3N6Canada Science institute University of IcelandDunhagi 3IS-107ReykjavikIceland Experimentelle Physik 2 Technische Universität DortmundDortmund 44227Germany Qingdao Innovation and Development Center Harbin Engineering UniversityQingdao 266000China

Deeply subwavelength lasers(or nanolasers)are highly demanded for compact on-chip bioimaging and sensing at the *** of the main obstacles for the development of single-particle nanolasers with all three dimensions shorter than the emitting wavelength in the visible range is the high lasing thresholds and the resulting *** we ex-ploit exciton-polariton condensation and mirror-image Mie modes in a cuboid CsPbBr3 nanoparticle to achieve coherent emission at the visible wavelength of around 0.53μm from its ultra-small(≈0.007μm3 or≈λ3/20)semiconductor *** polaritonic nature of the emission from the nanocavity localized in all three dimensions is proven by direct com-parison with corresponding one-dimensional and two-dimensional waveguiding systems with similar material *** a deeply subwavelength nanolaser is enabled not only by the high values for exciton binding energy(≈35 meV),re-fractive index(>2.5 at low temperature),and luminescence quantum yield of CsPbBr3,but also by the optimization of po-laritons condensation on the Mie resonances with quality factors improved by the metallic ***,the key parameters for optimal lasing conditions are intermode free spectral range and phonons spectrum in CsPbBr3,which govern polaritons condensation *** chemically synthesized colloidal CsPbBr3 nanolasers can be potentially de-posited on arbitrary surfaces,which makes them a versatile tool for integration with various on-chip systems.

关键词： nanolaser perovskite polariton Mie resonance exciton-polariton

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On the Homology of the Dual de Rham Complex

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Acta Mathematica Sinica,English Series 2022年第10期38卷 1666-1676页

作者： Roman MIKHAILOV Laboratory of Modern Algebra and Applications St.Petersburg State University14th Line29bSaint Petersburg199178Russia st.petersburg department of steklou mathematical institute Fontanka 27SaintPetersburg191023Russia

We study the homology of the dual de Rham complex as functors on the category of abelian *** give a description of homology of the dual de Rham complex up to degree 7 for free abelian groups and present a corrected ve... 详细信息

关键词： Dual de Rham complex polynomial functor divided powers derived functors

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Security and Privacy Challenges in SDN-Enabled IoT Systems: Causes, Proposed Solutions,and Future Directions

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Computers, Materials & Continua 2024年第8期80卷 2511-2533页

作者： Ahmad Rahdari Ahmad Jalili Mehdi Esnaashari Mehdi Gheisari Alisa A.Vorobeva Zhaoxi Fang Panjun Sun Viktoriia M.Korzhuk Ilya Popov Zongda Wu Hamid Tahaei institute of Artificial Intelligence Shaoxing UniversityShaoxing312000China department of Computer Engineering Gonbad Kavous UniversityGonbad-e Kavus49717-99151Iran Faculty of Computer Engineering K.N.Toosi University of TechnologyTehran196976-4499Iran department of Computer Science and Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical SciencesChennai602105India Secure Information Technologies department National Research University ITMOSt.Petersburg197101Russia School of Electrical and Computer Engineering Shiraz UniversityShiraz71946–84334Iran department of Computer Science and Engineering Islamic Azad UniversityDamavand***Iran department of R&D Shenzhen BKD Co.Ltd.Shenzhen518000China

Software-Defined Networking(SDN)represents a significant paradigm shift in network architecture,separating network logic from the underlying forwarding devices to enhance flexibility and centralize ***-rently,the Internet of Things(IoT)connects numerous devices to the Internet,enabling autonomous interactions with minimal human ***,implementing and managing an SDN-IoT system is inherently complex,particularly for those with limited resources,as the dynamic and distributed nature of IoT infrastructures creates security and privacy challenges during SDN *** findings of this study underscore the primary security and privacy challenges across application,control,and data planes.A comprehensive review evaluates the root causes of these challenges and the defense techniques employed in prior works to establish sufficient secrecy and privacy *** investigations have explored cutting-edge methods,such as leveraging blockchain for transaction recording to enhance security and privacy,along with applying machine learning and deep learning approaches to identify and mitigate the impacts of Denial of Service(DoS)and Distributed DoS(DDoS)***,the analysis indicates that encryption and hashing techniques are prevalent in the data plane,whereas access control and certificate authorization are prominently considered in the control plane,and authentication is commonly employed within the application ***,this paper outlines future directions,offering insights into potential strategies and technological advancements aimed at fostering a more secure and privacy-conscious SDN-based IoT ecosystem.

关键词： Security privacy-preserving software-defined network internet of things

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Dry Mix Slag—High-Calcium Fly Ash Binder. Part Two: Durability

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Materials Sciences and Applications 2024年第3期15卷 37-51页

作者： Alexey Brykov Mikhail Voronkov department of Chemical Technology of High-Melting Non-Metallic and Silicate Materials Saint Petersburg State Institute of Technology St. Petersburg Russia

This work investigates durability of cement-free mortars with a binder comprised of ground granulated blast furnace slag (GGBFS) activated by high-calcium fly ash (HCFA) and sodium carbonate (Na2CO3): the soundness, sulfate resistance, alkali-silica reactivity and efflorescence factors are considered. Results of tests show that such mortars are resistant to alkali-silica expansion. Mortars are also sulfate-resistant when the amount of HCFA in the complex binder is within a limit of 10 wt%. The fineness of fly ash determines its’ ability to activate GGBFS hydration, and influence soundness of the binder, early strength development, sulfate resistance and efflorescence behavior. The present article is a continuation of authors’ work, previously published in MSA, Vol. 14, 240-254.

关键词： Ground Granulated Blast-Furnace Slag High-Calcium Fly-Ash Sodium Car-bonate Blast-Furnace Slag Binder Durability ASR Sulfate Attack Soundness Efflorescence

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Probiotics and autoprobiotics for treatment of Helicobacter pylori infection

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World Journal of Clinical Cases 2023年第20期11卷 4740-4751页

作者： Natalia V Baryshnikova Anastasia S Ilina Elena I Ermolenko Yury P Uspenskiy Alexander N Suvorov department of Molecular Microbiology Institute of Experimental MedicineSt.Petersburg 197376Russia Internal Diseases department of stomatological Faculty Pavlov First St-Petersburg State Medical UniversitySt.Petersburg 197022Russia Laboratory of Medical and Social Pediatric Problems St-Petersburg State Pediatric Medical UniversitySt.Petersburg 194100Russia Clinical department Institute of Experimental MedicineSt.Petersburg 197376Russia department of Faculty Therapy Named After V.A.Valdman St-Petersburg State Pediatric Medical UniversitySt.Petersburg 194100Russia

The article discusses various approaches for probiotic treatment of Helicobacter pylori(***)infection:Probiotics as an adjuvant treatment in the standard eradication therapy;probiotic strains as a monotherapy;and autoprobiotics as a *** refer to indigenous bifidobacteria,lactobacilli,or enterococci isolated from a specific individual,intended to restore his/her microbiota and improve his/her *** potential mechanisms of probiotic action against *** include correction of the gut microbiota,immunological effects(enhancement of humoral and cellular immunity,and reduction of oxidative stress),direct antagonistic effects against ***(such as colonization resistance and bacteriocin synthesis),and stimulation of local immunological protection(strengthening of the mucous protective barrier and reduction of gastric mucosa inflammation).The incorporation of probiotics into comprehensive eradication therapy shows promise in optimizing the treatment of *** *** can enhance the eradication rates of ***,reduce the occurrence and severity of side effects,and improve patient *** or autoprobiotic monotherapy can be considered as an alternative treatment approach in cases of allergic reactions and insufficient effectiveness of *** recommend including probiotics as adjunctive medications in *** ***,further randomized multicenter studies are necessary to investigate the effects of probiotics and autoprobiotics against ***,in order to gain a better understanding of their mechanisms of action.

关键词： Helicobacter pylori Probiotic Autoprobiotic Eradication Microbiota Gut Immunity

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ITO-free silicon-integrated perovskite electrochemical cell for light-emission and light-detection

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Opto-Electronic Advances 2023年第9期6卷 45-58页

Halide perovskite light-emitting electrochemical cells are a novel type of the perovskite optoelectronic devices that differs from the perovskite light-emitting diodes by a simple monolayered ***,we develop a perovskite electrochemical cell both for light emission and detection,where the active layer consists of a composite material made of halide perovskite microcrystals,polymer support matrix,and added mobile *** perovskite electrochemical cell of CsPbBr3:PEO:LiTFSI composition,emitting light at the wavelength of 523 nm,yields the luminance more than 7000 cd/m2 and electroluminescence efficiency of 4.3 lm/*** device fabricated on a silicon substrate with transparent single-walled carbon nanotube film as a top contact exhibits 40%lower Joule heating compared to the perovskite optoelectronic devices fabricated on conventional ITO/glass ***,the device operates as a photodetector with a sensitivity up to 0.75 A/W,specific detectivity of 8.56×1011 Jones,and linear dynamic range of 48 *** technological potential of such a device is proven by demonstration of 24-pixel indicator display as well as by successful device miniaturization by creation of electroluminescent images with the smallest features less than 50μm.

关键词： composite inorganic halide perovskite silicon single walled carbon nanotubes light-emitting electrochemical cell photodetector indicator display

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