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Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum

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Light(Science & Applications) 2020年第1期9卷 1480-1487页

作者： Vasily Kravtsov Ekaterina Khestanova Fedor A.Benimetskiy tatiana ivanova Anton K.Samusev Ivan S.Sinev Dmitry Pidgayko Alexey M.Mozharov Ivan S.Mukhin Maksim S.Lozhkin Yuri V.Kapitonov Andrey S.Brichkin Vladimir D.Kulakovskii Ivan A.Shelykh Alexander I.Tartakovskii Paul M.Walker Maurice S.Skolnick Dmitry N.Krizhanovskii Ivan V.Iorsh ITMO University Saint Petersburg 197101Russia St.Petersburg Academic University Saint Petersburg 194021Russia Saint Petersburg State University ul.Ulyanovskaya 1Saint Petersburg 198504Russia Institute of Solid State Physics RASChernogolovka 142432Russia Science Institute University of IcelandDunhagi 3IS-107ReykjavikIceland Department of Physics and Astronomy University of SheffieldSheffield S37RHUK

Optical bound states in the continuum(BICs)provide a way to engineer very narrow resonances in photonic *** extended interaction time in these systems is particularly promising for the enhancement of nonlinear optical processes and the development of the next generation of active optical ***,the achievable interaction strength is limited by the purely photonic character of optical ***,we mix the optical BIC in a photonic crystal slab with excitons in the atomically thin semiconductor MoSe_(2) to form nonlinear exciton-polaritons with a Rabi splitting of 27 meV,exhibiting large interaction-induced spectral *** asymptotic BIC-like suppression of polariton radiation into the far field toward the BIC wavevector,in combination with effective reduction of the excitonic disorder through motional narrowing,results in small polariton linewidths below 3 *** with a strongly wavevector-dependent Q-factor,this provides for the enhancement and control of polariton–polariton interactions and the resulting nonlinear optical effects,paving the way toward tuneable BIC-based polaritonic devices for sensing,lasing,and nonlinear optics.

关键词： polar nonlinear continuum

Investigation of thermal evolution of nanodomain structures in nonlinear barium sodium niobate crystals

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Chinese Optics Letters 2008年第2期6卷 143-145页

作者： S.V.ivanova P.N.Lebedev Physical Institute of RAS Leninsky pr.53 Moscow 119991Russia

By the 90° elastic light scattering investigation and far field observation in the range of 20 - 800 ℃, the relation between behavior of light scattering anomalies and evolution of nanodomain structures in lattice of barium sodium niobate （Ba2NaNb5O15, BSN） crystal was clarified. The correlation between anomalies on the temperature curves of the elastic light scattering intensity and temperature transformations of nanodomains was studied by X-ray and electron microscope methods. Phase transition near 500 ℃ and movement in field of scattering light could be explained by appearance of a new incommensurate phase.

关键词： Elastic scattering Light fields Light intensity Light scattering Transmission electron microscopy X ray microscopy

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Modelling of microbial enhanced oil recovery application using anaerobic gas-producing bacteria

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Petroleum Science 2014年第2期11卷 272-278页

作者： Pavel Spirov Yanina ivanova Svetlana Rudyk Department of Petroleum and Chemical Engineering Sultan Qaboos University Chemistry & Environment Mrsk Olie og Gas A/S Kanalen 2 DK-6700 Esbjerg

Microbial enhanced oil recovery （MEOR） methods apply injection of bacteria to depleted oil reservoirs to produce oil, which had remained unrecovered after the conventional methods of production. The ability ofthermophilic anaerobic bacteria to produce gas as the main mechanism in potential MEOR in high salinities of 70-100 g/L was investigated in this study. Maximum gas production of up to 350 mL per 700 mL of salty solution was produced at a salinity of 90 g/L stably during 2-4 days of experiment. The experimental results were upscaled to the Snorre Oilfield, Norway, and simulated using ECLIPSE software for 27 months. The best scenarios showed that the increase in oil recovery on average was at 21% and 17.8% respectively. This study demonstrated that anaerobic bacteria used in biogas plants could be an attractive candidate for MEOR implementation due to their ability to withstand high temperature and salinity, and produce gas in large volumes.

关键词： Microbiological enhanced oil recovery CO2 injection ECLIPSE simulation

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Influence of agricultural development and climate changes on the drainage valley density of the southern half of the Russian Plain

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International Journal of Sediment Research 2017年第1期32卷 60-72页

作者： Valentin Golosov Nadezhda ivanova Saniya Kurbanova Kazan Federal University Lomonosov Moscow State University

The southern half of the Russian Plain is characterized by a relatively short history of intensively ploughed *** duration varies from approximately three centuries in the southern part of the forest zone to less than one century in some parts of the steppe *** was found that after cultivation,on more than 40%of lands in river basins the drainage valley density(Ddv) decreased by 15-58%in all landscape *** the first stage,the Ddvdecrease was mostly associated with increasing surface runoff coefficient after cultivation of virgin lands with proportional decreases in groundwater *** the second stage,usually after reaching areas of arable lands in river basins > 60%,the volume of eroded sediments entering small river channels exceeded the transport capacities of the permanent *** a result,the river channels completely *** later stages,the sediment redistribution cascade within the small river basins of the Russian Plain stabilized because of the increasing proportion of sediment eroded from the basin areas and re-deposited before entering the river channels because of the increasing area of sediment sinks due to the increase in dry valley lengths and total *** morphological parameters of small valleys and groundwater discharges are the key parameters that affect the intensity of small river aggradation on the regional scale.

关键词： Soil erosion Sediment redistribution Climate change Land use change European Russia

Precracking and interfacial delamination in a bi-material structure:Static and dynamic loadings

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Acta Mechanica Sinica 2011年第1期27卷 80-89页

作者： Barbara Gambin Jordanka ivanova Varbinka Valeva Gergana Nikolova Institute of Fundamental Technological Research Institute of Mechanics

The behavior of a precracked bi-material structure interface under given static and dynamic axial loading is an interest object in the present ***,it is shown that the shear-lag model is a proper tool to analyze a delamination process in a precracked bi-material structure undergoing static ***,the＂shear-lag model＂is applied to the structure under dynamic *** solve the problem for an interface delamination of the structure and to determine the debond length along the interface,our own 2D boundary element method（BEM）code is proposed in the case of static loading,and the shear-lag model together with the Laplace transforms and half-analytical calculations are used in the case of dynamic *** interface layer is assumed as a very thin plate compared with the other *** parametric（geometric and elastic）analysis of the debond length and interface shear stress is done. The results from the 2D BEM code proved the validity of analytical solutions to the shear-lag *** the dynamic case,the influence of loading characteristics,i.e.,frequencies and amplitude fluctuations on the shear stress and the value of debond length for an interval of time,is discussed. The analysis of the obtained results is illustrated by an example of the modern ceramic-metal composite,namely cermet, and depicted in figures.

关键词： Debond length · Precracked bi-material structure · Shear-lag model · Delamination · BEM

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Environmental performance assessments of different methods of coal preparation for use in small-capacity boilers: experiment and theory

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International Journal of Coal Science & Technology 2023年第5期10卷 57-71页

作者： A.N.Kozlov E.P.Maysyuk I.Yu.ivanova Melentiev Energy Systems Institute of Siberian Branch of the Russian Academy of Sciences Irkutsk130Lermontov664033Russia

The purpose of this article is to receive environmental assessments of combustion of different types of coal fuel depending on the preparation(unscreened,size-graded,briquetted and heat-treated)in automated boilers and boilers with manual *** assessments were made on the basis of data obtained from experimental methods of coal preparation and calculated methods of determining the amount of pollutant and greenhouse gas emissions,as well as the mass of ash and slag *** main pollutants from coal combustion are calculated:particulate matter,benz(a)pyrene,nitrogen oxides,sulfur dioxide,carbon *** the greenhouse gases carbon dioxide is *** a result of conducted research it is shown that the simplest preliminary preparation(size-graded)of coal significantly improves combustion efficiency and environmental performance:emissions are reduced by 13%for hard coal and up to 20%for brown *** introduction of automated boil-ers with heat-treated coal in small boiler facilities allows to reduce emissions and ash and slag waste by 2-3 *** best environmental indicators correspond to heat-treated lignite,which is characterized by the absence of sulfur dioxide emissions.

关键词： Coal preparation Automated and hand-fed coal boilers Environmental performance metrics

Unbinding The Pillow Book

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Same Eastern Europe,Different Attitudes towards China——The Differences between the Foreign Policies of Bulgaria and Poland towards China after 1989

作者： Gergana ivanova.

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Same Eastern Europe,Different Attitudes towards China——The...

作者： ivanova Zlatina Petrova 华东师范大学

学位级别：硕士

2019年是中华人民共和国成立70周年。这也标志着中国与保加利亚、中国和波兰建交70周年。从建交时间上来看,保加利亚与波兰只有三天的差距,分别是1949年10月4日与1949年10月7日。彼时,两国正式承认中华人民共和国,并与这个新的国家实体... 详细信息

2019年是中华人民共和国成立70周年。这也标志着中国与保加利亚、中国和波兰建交70周年。从建交时间上来看,保加利亚与波兰只有三天的差距,分别是1949年10月4日与1949年10月7日。彼时,两国正式承认中华人民共和国,并与这个新的国家实体建立了外交关系。近70年来,中保关系和中波关系的发展虽然经历了一些紧张和困难的时期,但他们也不断地加强、改善两国之间的关系。因此,我们现在所拥有的是一个有着相对悠久历史的国家,我们所看到的和期待的对于中国和保加利亚,中国和波兰的双方关系来说,无疑是一个光明且充满希望的未来。这个研究致力于保加利亚和波兰对中国的外交政策。其目的是审视1989年后保加利亚和波兰对华外交政策之间的差异。理由是分析中保关系和中波关系以及保加利亚和波兰对中华人民共和国的态度。我认为保加利亚和波兰之间存在意识形态差异。保加利亚对中国更加务实和友好,而波兰因为更具意识形态性而对中国相对不那么友好。

关键词：中国保加利亚波兰外交政策

Role of GM3 ganglioside in the pathology of some progressive human diseases and prognostic importance of serum anti-GM3 antibodies

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BIOCELL 2021年第6期45卷 1485-1494页

作者： VERA KOLYOVSKA SONYA ivanova DESISLAVA DRENSKA DIMITAR MASLAROV RENETA TOSHKOVA Institute of Experimental Morphology Pathology and Anthropology with MuseumBulgarian Academy of SciencesSofia1113Bulgaria University Hospital for Neurology and Psychiatry“St.Naum” Sofia1797Bulgaria University First MHAT-Sofia “St.John Krastitel”Neurology ClinicSofia1142Bulgaria Medical University of Sofia Medical College“Y.Filaretova”Sofia1606Bulgaria

Glycosphingolipids(gangliosides)have been characterized as important biological molecules with a key role as regulators in many physiological processes on cellular,tissue,organ,and organism *** deviations in their normal amounts,production,and metabolism are very often related to the development of many multi-factor socially important ***3 ganglioside,as a small molecule,plays important roles in the cascade regulatory pathways in the pathology of many disorders like neurodegenerative diseases,autoimmune diseases,inflammation,diabetes,malignant transformation,and *** GM3 and its derivatives are membrane-bound glycosphingolipids composed of an oligosaccharide head structure containing one sialic acid *** molecules transduce signals involved in cell surface events,including the phosphorylation of transmembrane *** ganglioside is the most widely distributed among tissues,and it serves as a precursor for most of the more complex ganglioside ***3 inhibits the function of fibroblast growth factor receptor,and cell growth is regulated by GM3-enriched ***3 is thought to inhibit immunologic functions,such as the proliferation and production of cytokines by T *** the other hand,the anti-ganglioside antibodies(AGAs)are important in many acquired demyelinating immunemediated neuropathies,like Multiple sclerosis(MS),Guillain–Barrésyndrome(GBS)and its variation,Miller–Fisher syndrome(MFS)and could be suggested as important diagnostic and prognostic markers about the describe diseases and their *** show that the complexes of anti-ganglioside antibodies to GM3(detected by ELISA)may be useful diagnostic and prognostic tool markers for autoimmune diseases,neurodegenerative disorders,malignancy,diabetes,and *** pilot studies suggest increased serum IgG anti-GM3 antibodies titers in patients with secondary progressive MS(SPMS),throat cancer,elder people with diabetes(89–96 years),old Lewis rat

关键词： Biomarkers Serum GM3 Serum anti-GM3 antibodies ELISA