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On the ground state energy of the inhomogeneous Bose gas

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Frontiers of physics 2017年第3期12卷 197-201页

作者： v. B. bobrov S. A. Trigger Joint Institute for High Temperatures Russian Academy of Sciences 13/19 Izhorskaia Str. Moscow 125412 Russia

Within the self-consistent Hartree^Fock approximation, an explicit in this approximation expression for the ground state energy of inhomogeneous Bose gas is derived as a functional of the inhomogeneous density of the Bose-Einstein condensate. The results obtained are based on existence of the off-diagonal long-range order in the single-particle density matrix for systems with a Bose-Einstein condensate. This makes it possible to avoid the use of anomalous averages. The explicit form of the kinetic energy, which differs from one in the Gross-Pitaevski approach, is found. The obtained form of kinetic energy is valid beyond the Hartree--Fock approximation and can be applied for arbitrary strong interparticle interaction.

关键词： Bose condensation elementary excitations single-particle Green function density-density Green function thermodynamic energy

Elaboration of a conceptual solution for the development of the Arctic shelf from seasonally flooded coastal areas

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International Journal of Mining Science and Technology 2022年第1期32卷 113-119页

作者： vladimir S.Litvinenko Mikhail v.Dvoynikov vladimir L.Trushko Saint-Petersburg Mining University Saint-Petersburg 199106Russia

Currently,construction of facilities in the Arctic is carried out on sand islands,but there are limitations for remote coastal *** restrictions are associated with the lack of quarries with construction sand in the immediate vicinity of the work site,as well as the risk of seasonal flooding of the *** article includes conceptual solutions for construction of modular piling in Arctic nearshore conditions,upon which drilling rigs and auxiliary equipment can be placed for the purpose of subsequent wildcatting,development and exploratory extended reach drilling wells(with measured depth about 15000 m).During the construction of the modular piling foundations,a mathematical simulation of the thermodynamic condition of the frozen ground was conducted,and the bearing capacity of the foundations was *** proposed solutions will solve these problems by constructing modular pile foundations and placing the necessary infrastructure on them,taking into account the distribution of loads during operation in seasonally flooded areas.

关键词： Drilling&drillholes Stress analysis Offshore engineering Infrastructure planning Geotechnical engineering Extended reach drilling

Provenance of Precambrian Fe- and Al-rich Metapelites in the Yenisey Ridge and Kuznetsk Alatau, Siberia: Geochemical Signatures

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Acta Geologica Sinica(English Edition) 2007年第3期81卷 409-423页

作者： Igor I. LIKHANOv vladimir v. REvERDATTO Institute of Geology and Mineralogy Siberian Branch Russian Academy of SciencesPr. Acad. Koptyuga3Novosibirsk630090Russian Federation

Major, trace and rare earth element contents of Fe- and Al-rich metapelites from the Korda （Yenisey Ridge） and Amar （Kuznetsk Alatau） formations were determined to examine the nature, origin and evolution of their protoliths. Results indicate that these rocks are the redeposited and metamorphosed products of Precambrian kaolinitic weathering crusts, while the geochemical distinctions between the studied metapelites are determined by different weathering conditions in the source area and tectonic settings. The protolith of the Korda Formation metapelites was produced by erosion products of the post-Archean granitoid rocks, which accumulated under humid climate conditions in shallow-water basins along the continental margin. The geochemical characteristics of the deeper primary deposits of the Amar Formation suggest that volcanogenic material of mafic composition derived from an island-arc environment had a major role in supplying the erosion zone. These results agree with lithofacies data and with the geodynamic reconstruction of the evolution of the Yenisey Ridge and Kuznetsk Alatau during the Mesoproterozoic and Neoproterozoic, respectively. It was shown that REEs had limited mobility during contact metamorphism. The coherent mobility of REEs during collisional metamorphism may be attributed both to mineral reactions responsible for modal changes and to local chemical heterogeneity inherited from the initial protolith.

关键词： geochemistry protolith pelitic schists Kuznetsk Alatau Yenisey Ridge Russia

Role of the Rossiter-McLaughlin effect in the study of close binaries

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Research in Astronomy and Astrophysics 2019年第3期19卷 21-30页

作者： Galina N.Dryomova vladimir v.Dryomov Russian Federal Nuclear Centre

This paper is devoted to binary stars belonging to the class of eclipsing-variable *** and spectroscopic analysis of eclipses allows us to determine geometric parameters of the orbit and physical characteristics of stellar components as well as inclinations of stellar equators to the orbital plane. Estimations of inclinations can be obtained from measurement of the Rossiter-McLaughlin effect, which is discussed using examples of some eccentric binaries with an anomalous apsidal effect. Our task is to find the complete spectrum of solutions of the equation of apsidal motion, depending on the inclinations of the polar axes of the components to the orbital one for these systems, based on their individual spectroscopic and photometric observational data. The matrix of solutions allows us to select those pairs of polar inclinations that provide agreement with the observational apsidal period.

关键词： Rossiter-McLaughlin effect: eclipsing-variable stars apsidal effect individual binaries: AI Hya,NY Cep,EW Ori,DI Her,AS Cam

Arrestins:structural disorder creates rich functionality

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Protein & Cell 2018年第12期9卷 986-1003页

作者： vsevolod v.Gurevich Eugenia v.Gurevich vladimir N.Uversky Department of Pharmacology Vanderbilt UniversityNashvilleTN 37232USA Department of Molecular Medicine and USF Health Byrd Alzheimer's Research Institute Morsani College of Medicine University of South FloridaTampaFL 33612USA Institute for Biological Instrumentation Russian Academy of SciencesPushchinoMoscow RegionRussia 142290

Arrestins are soluble relatively small 44-46 kDa proteins that specifically bind hundreds of active phosphorylated GPCRs and dozens of non-receptor partners. There are binding partners that demonstrate preference for each of the known arrestin conformations: free, receptor-bound, and microtubule-bound. Recent evidence suggests that conformational flexibility in every functional state is the defining characteristic of arrestins. Flexibility, or plasticity, of proteins is often described as structural disorder, in contrast to the fixed conformational order observed in high-resolution crystal structures. However, protein-protein interactions often involve highly flexible elements that can assume many distinct conformations upon binding to different partners. Existing evidence suggests that arrestins are no exception to this rule: their flexibility is necessary for functional versatility. The data on arrestins and many other multi-functional proteins indicate that in many cases, "order" might be artificially imposed by highly non-physiological crystallization conditions and/or crystal packing forces. In contrast, conformational flexibility (and its extreme case, intrinsic disorder) is a more natural state of proteins, representing true biological order that underlies their physiologically relevant functions.

关键词： EPR GPCR NMR arrestin crystal structure disorder protein-protein interactions

Sensing Characteristics of Mixed-Potential-Type YSZ-Based NO_x Sensor Using Au-Doped NiO Sensing Electrode

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稀有金属材料与工程 2006年第A3期35卷 36-39页

作者： vladimir v.Plashnitsa Taro Ueda Norio Miura Art Science and Technology Center for Cooperative ResearchKyushu UniversityKasuga-ShiFukuoka 816-8580Japan Interdisciplinary Graduate School of Engineering Sciences Kyushu UniversityKasuga-shiFukuoka 816-8580Japan

The nano-structured NiO powder obtained by sol-gel method was doped with 10 wt% gold in order to modify its morphology as well as its electrochemical catalytic *** NO_x sensing characteristics of mixed-potential-type YSZ-based planar sensors attached with each of the nano-NiO and the Au-doped nano-NiO materials as a sensing electrode SE) were examined at temperatures of 700℃～800℃.The Au-doped NiO-SE was found to give a large enhancement in the NO_2 sensitivity as well as the NO_2 selectivity at 800℃under wet condition,in comparison with the pure *** reason for the improvement in the NO_2 sensitivity was examined based on the data of polarization curves,impedance spectra and catalytic activity for the gas-phase NO_2 decomposition.

关键词： NO_x sensor mixed potential NiO nanostructure YSZ Au

Advances in small animal mesentery models for in vivo flow cytometry,dynamic microscopy,and drug screening

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World Journal of Gastroenterology 2007年第2期13卷 192-218页

作者： Ekaterina I Galanzha valery v Tuchin vladimir P Zharov Philips Classic Laser Laboratories University of Arkansas for Medical Sciences (UAMS) Little Rock AR United States Department of Optics and Biomedical Physics Research-Educational Institute of Optics and Biophotonics Saratov State University Saratov Russia Department of Optics and Biomedical Physics Research-Educational Institute of Optics and Biophotonics Saratov State University Saratov Russia Philips Classic Laser Laboratories University of Arkansas for Medical Sciences (UAMS) Little Rock AR United States

Using animal mesentery with intravital optical microscopy is a well-established experimental model for studying blood and lymph microcirculation in vivo. Recent advances in cell biology and optical techniques provide the basis for extending this model for new applications, which should generate significantly improved experimental data. This review summarizes the achievements in this specific area, including in vivo label-free blood and lymph photothermal flow cytometry, super-sensitive fluorescence image cytometry, light scattering and speckle flow cytometry, microvessel dynamic microscopy, infrared (IR) angiography, and high-speed imaging of individual cells in fast flow. The capabilities of these techniques, using the rat mesentery model, were demonstrated in various studies; e.g., real-time quantitative detection of circulating and migrating individual blood and cancer cells, studies on vascular dynamics with a focus on lymphatics under normal conditions and under different interventions (e.g. lasers, drugs, nicotine), assessment of lymphatic disturbances from experimental lymphedema, monitoring cell traffic between blood and lymph systems, and high-speed imaging of cell transient deformability in flow. In particular, the obtained results demonstrated that individual cell transportation in living organisms depends on cell type (e.g., normal blood or leukemic cells), the cell’s functional state (e.g., live, apoptotic, or necrotic), and the functional status of the organism. Possible future applications, including in vivo early diagnosis and prevention of disease, monitoring immune response and apoptosis, chemo- and radio-sensitivity tests, and drug screening, are also discussed.

关键词： Lymph microcirculation Transmission digital microscopy Rat mesentery Flow cytometry Photothermal technique

The Cauchy Problem for Coupled Nonlinear Schrdinger Equations with Linear Damping： Local and Global Existence and Blowup of Solutions

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Chinese Annals of Mathematics,Series B 2016年第5期37卷 665-682页

作者： Joao-Paulo DIAS Mario FIGUEIRA vladimir v. KONOTOP LCMAF-CIO Faculdade de Ciencias Universidade de Lisboa Av. Prof. Gama Pinto 2 1649-003 Lisboa Portugal. Centro de Fisica Teorica e Computacional and Departamento de Fisica Faculdade de Ciencias Universidade de Lisboa Campo Grande Ed.C8 1749-016 Lisboa Portugal.

The authors study, by applying and extending the methods developed by Cazenave(2003), Dias and Figueira(2014), Dias et al.(2014), Glassey(1994–1997), Kato(1987), Ohta and Todorova(2009) and Tsutsumi(1984), the Cauchy problem for a damped coupled system of nonlinear Schrdinger equations and they obtain new results on the local and global existence of H^1-strong solutions and on their possible blowup in the supercritical case and in a special situation, in the critical or supercritical cases.

关键词： supercritical Cauchy applying estimates proof admissible constants uniqueness nonlinearity inequality

Hidden symmetry operators for asymmetric generalized quantum Rabi models

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Chinese Physics B 2022年第1期31卷 320-323页

作者： Xilin Lu Zi-Min Li vladimir v Mangazeev Murray T Batchelor Department of Theoretical Physics Research School of PhysicsAustralian National UniversityCanberra ACT 2601Australia Mathematical Sciences Institute Australian National UniversityCanberra ACT 2601Australia Centre for Modern Physics Chongqing UniversityChongqing 40444China

The hidden Z2 symmetry of the asymmetric quantum Rabi model(AQRM)has recently been revealed via a systematic construction of the underlying symmetry *** on the AQRM result,we propose an ansatz for the general form of the symmetry operators for AQRM-related *** this ansatz we obtain the symmetry operator for three models:the anisotropic AQRM,the asymmetric Rabi–Stark model(ARSM),and the anisotropic ARSM.

关键词： light-matter interaction hidden symmetry asymmetric quantum Rabi model asymmetric Rabi-Stark model