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Universality test of short range nucleon-nucleon correlations in nuclei with strange and charmed probes

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Chinese Physics C 2022年第1期46卷 124-128页

作者： Yu.T.kiselev NRC"Kurchatov Institute"-ITEP Moscow 117218 Russia

Understanding the EMC effect and its relation to the short-range nucleon-nucleon correlations(SRC)in nuclei is a major challenge for modem nuclear *** of the key aspects of the connection between these phenomena is the *** universality states that the SRC is responsible for the EMC effect and that the modification of the partonic structure of the SRC is the same in different *** flavor dependence of the universal-ity is one of the unanswered *** investigations conducted to date have demonstrated the existence and universality of the SRC for light u and d ***,it was suggested that the universality for heavy flavors can be studied through their deep subthreshold production in yA and eA *** this paper,we discuss an alternative possibility to access the strange and gluon high-A"structure of the SRC and to establish universality for heavy flavors using nuclear semi-inclusive deep inelastic scattering(nSIDIS),which probes different quark flavor combinations depending on the final state *** specific reaction can be"tagged"by observation of a strange or charmed particle registered in coincidence with the scattering *** universality of the SRC can be tested in the kinematic region,i.e.,X>1,where the contribution to the cross section from SRC becomes *** the strangeness,charmonium,and open charm will shed light on the role of quarks and gluons in nuclei,thereby developing an understanding of how nuclei emerge within QCD.

关键词： EMC effect strange and charm quarks in nuclei short-range nucleon correlation in nuclei

Digital Earth surface maps for radar ground clutter simulation

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Journal of Systems Engineering and Electronics 2022年第2期33卷 340-344页

作者： ORESHKINA Margarita STEPANOV Maksim kiselev Alexey Novosibirsk State Technical University Novosibirsk 630073Russia

This paper dwells upon optimizing the azimuth samp-ling interval of digital surface maps used to model radar ground *** resulting equations can be used to find the digital map sampling interval for the required calculation error and modeled power of the simulated signal,which determines the resulting distribution of backscatter *** paper further showcases how the sampling interval could be increased by pre-processing the map.

关键词： ground clutter mathematical modelling radar simulation

Magnetic skyrmion bundles join the family of topological solitons

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Science China(Physics,Mechanics & Astronomy) 2022年第4期65卷 123-124页

作者： Nikolai S.kiselev Peter Grünberg Institut and Institute for Advanced Simulation Forschungszentrum JülichJülich D-52425Germany

Magnetic solitons are localized magnetic textures that are similar to ordinary particles-they have defined size and can move and interact with each other. Topological solitons [1],in addition, are characterized by the so-called topological charge or topological index, which allows classifying magnetic solitons and has the following meaning.

关键词： topological solitons ordinary

Features of the long-term transformation of the Krasnodar reservoir,near the mouth of the Kuban River,Russia

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Journal of Geographical Sciences 2021年第12期31卷 1895-1904页

作者： POGORELOV Anatoly LAGUTA Andrey kiselev Evgeny LIPILIN Dmitry Kuban State University Krasnodar 350040Russia Aerogematica LLC Krasnodar 350063Russia Kuban State Agrarian University Named after I.T.Trubilin Krasnodar 350044Russia Tuapse Branch of the Russian State Hydrometeorological University Krasnodar RegionTuapse 352800Russia

The article considers the long-term(1941-2018)transformation of the Krasnodar valley reservoir,the largest in the North *** main functions of the Krasnodar reservoir are irrigation of rice systems and flood protection of land in the Krasnodar reservoir region and the Republic of *** to topographic maps,Landsat satellite images(1974-2018)and field observations(2016-2018),four stages of transformation of the floodplain reservoir are *** selected stages are characterized by both natural causes(the transformation of the filling deltas into the extended deltas,etc.)and man-made causes(runoff diversions in the delta areas,etc.).The key factor of transformation is the formation of deltas of rivers flowing into the *** of the selected stages,against the background of a gradual reduction in the area and volume of the reservoir,is characterized by the peculiarities of the formation of river deltas with the formation of genetically homogeneous sections of delta *** the period of operation of the reservoir,the delta of the main Kuban River moved up to 32.4 km and took away an area of 35.4 km^(2) of the *** the formation of the deltas of the Kuban and Belaya rivers,a bridge was formed on the Krasnodar *** evolution of the delta regions led to the division of the reservoir into two autonomous *** total area of the delta regions was 85.9 km^(2) by 2018,i.e.,21% of the initial area of the *** transformation of the Krasnodar reservoir leads to a decrease in its regulated volume and gradual degradation.

关键词： Krasnodar reservoir sedimentation siltation transformation delta formation Landsat

Characterization of modified mesoporous silica nanoparticles as vectors for siRNA delivery

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Asian Journal of Pharmaceutical Sciences 2018年第6期13卷 592-599页

作者： Anna Slita Anna Egorova Eudald Casals Anton kiselev Jessica M.Rosenholm Pharmaceutical Sciences Laboratory Faculty of Science and EngineeringAbo Akademi University D.O.Ott Research Institute of Obstetrics Gynaecology and Reproductology

Gene therapy using siRNA molecules is nowadays considered as a promising approach. For successful therapy, development of a stable and reliable vector for siRNA is crucial. Non-viral and non-organic vectors like mesoporous silica nanoparticles(MSN) are associated with lack of most viral vector drawbacks, such as toxicity, immunogenicity, but also generally a low nucleic acid carrying capacity. To overcome this hurdle, we here modified the pore walls of MSNs with surface-hyperbranching polymerized poly(ethyleneimine)(hbPEI), which provides an abundance of amino-groups for loading of a larger amount of siRNA molecules via electrostatic adsorption. After loading, the particles were covered with a second layer of pre-polymerized PEI to provide better protection of siRNA inside the pores, more effective cellular uptake and endosomal escape. To test the transfection efficiency of PEI covered si RNA/MSNs, MDA-MB 231 breast cancer cells stably expressing GFP were used. We demonstrate that PEI-coated si RNA/MSN complexes provide more effective delivery of si RNAs compared to unmodified MSNs. Thus, it can be concluded that appropriately surface-modified MSNs can be considered as prospective vectors for therapeutic siRNA delivery.

关键词： Gene therapy Nanocarriers siRNA delivery Mesoporous silica nanoparticles

Dynamic Modeling of the Feed Drive System of a CNC Metal Cutting Machine

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Sound & Vibration 2021年第1期55卷 19-30页

作者： H.Heydarnia I.a.kiselev M.M.Ermolaev S.Nikolaev Department of Applied Mechanics Bauman Moscow State Technical UniversityMoscowRussia Department of Bases of Machine Designing Bauman Moscow State Technical UniversityMoscowRussia Skolkovo Institute of Science and Technology MoscowRussia

Studying the vibrational behavior of feed drive systems is important for enhancing the structural performance of computer numerical control(CNC)*** preload on the screw and nut position have a great influence on the vibration characteristics of the feed drive as two very important operational *** acceleration of the screw also affects the performance of the CNC feed drive when machining small *** paper investigates the influence of preload and nut position on the vibration characteristics of the feed drive system of a CNC metal cutting machine in order to be able to eliminate an observed resonance occurred at high rotational speeds of the screw,corresponding to high feed ***,rational structural parameters of the feed drive system are selected in order to increase the rotational acceleration for improving the performance of the CNC *** and analyses showed that by selecting specific parameters of feed drive system and simultaneously applying a certain value of preload,a 97%increase in rotational acceleration and 30%time reduction considering the vibration resistance at high rotational speeds can be achieved.

关键词： Machining performance CNC machine tools vibration characteristics machine tool dynamic modeling

Medium effects in ΛK~＋ pair production by 2.83 GeV protons on nuclei

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Chinese Physics C 2017年第12期41卷 88-105页

作者： E. Ya. Paryev M. Hartmann Yu. T. kiselev Institute for Nuclear Research Russian Academy of Sciences Moscow 117312 Russia Institute for Theoretical and Experimental Physics Moscow 117218 Russia Institut für Kernphysik and Jülich Centre for Hadron Physics Forschungszentrum Jiilich D-52425 Jiilich Germany

We study ΛK~＋ pair production in the interaction of protons of 2.83 GeV kinetic energy with C, Cu,Ag, and Au target nuclei in the framework of the nuclear spectral function approach for incoherent primary proton–nucleon and secondary pion–nucleon production processes, and processes associated with the creation of intermediate Σ~0K~＋ pairs. The approach accounts for the initial proton and final Λ hyperon absorption, final K~＋ meson distortion in nuclei, target nucleon binding, and Fermi motion, as well as nuclear mean-field potential effects on these *** calculate the Λ momentum dependence of the absolute ΛK~＋ yield from the target nuclei considered, in the kinematical conditions of the ANKE experiment, performed at COSY, within the different scenarios for the Λ-nucleus effective scalar potential. We show that the above observable is appreciably sensitive to this potential in the low-momentum region. Therefore, direct comparison of the results of our calculations with the data from the ANKE-at-COSY experiment can help to determine the above potential at finite momenta. We also demonstrate that the two-step pion–nucleon production channels dominate in the low-momentum ΛK~＋ production in the chosen kinematics and, therefore, they have to be taken into account in the analysis of these data.

关键词： proton-nucleus reactions medium effects hyperon nuclear potential

Study on the Quest of Philosophical Identity: Definition of Philosophy in Chinese HistoricalPhilosophical Writings at the Beginning of the 20th Century

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Study on the Quest of Philosophical Identity: Definition of ...

Morphology,structure and magnetic behavior of orthorhombic and hexagonal HoFeO_(3)synthesized via solution combustion approach

作者： Valery kiselev Peoples’ Friendship University of Russia (RUDN)

The present article examines a range of attempts to give a definition to the term ‘philosophy', undertaken in Chinese works on the history of Chinese philosophy in the early 20 th century. Focus of the article is on the writings of Xie Wuliang, Hu Shih, Zhong Tai and Feng Youlan. These researchers were pioneers in formulating the first histories of Chinese philosophy, and in their works, they tried to figure out the problem field of philosophy and identify the place and role of the Chinese thought in the global philosophy. Modern understanding of philosophy in China is based on the definitions provided for in these writings.

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Journal of Rare Earths 2022年第2期40卷 296-301,I0004页

作者： K.D.Martinson I.S.Kondrashkova M.I.Chebanenko A.S.kiselev T.Yu kiseleva V.I.Popkov Ioffe Institute 26 PoliteknicheskayaSL Petersburg194021Russia Saint Petersburg State Institute of Technology 26 MoskovskySt.Petersburg190013Russia Faculty of Physics M.V.Lomonosov State UniversityLeninskie CoryMoscow119991Russia

Nanostructured HoFeO_(3)powders were obtained by solution combustion method at various glycinenitrate ratios(G/N=0.2,0.4,...,1.4).According to X-ray powder diffractometry data,the presence of two modifications of HoFeO_(3)in the synthesized samples was established:orthorhombic(Pbnm)and hexagonal(P63/mmc).The crystallite size of the obtained compositions varies from 62±6 to 29±3 nm,depending on the G/N *** magnetic structure studies,it is found that HoFeO_(3)obtained with a stoichiometric amount of glycine in the reaction solution is in the magnetically ordered state and is represented by a sextet with quadrupole splitting(QS)=0 mm/s,isomeric shift(IS)=0.36 mm/s and effective field strength(Heff)=497 *** to the results of vibrational magnetometry,it is found that the orthoferrites obtained have a ferromagnetic structure,the main parameters of which(Ms,Mr and Hc)systematically change with a change in the redox ratio of the reaction mixture and,as a consequence,their phase composition,and reach maximum values at a G/N ratio=*** the samples obtained with a significant excess and lack of glycine(G/N=0.2 and 1.4),despite their amorphous nature,hysteresis loops characteristic of the ferromagnetic state of the substance is *** is hopeful to obtain a pure hexagonal modification of HoFeO_(3)via heat treatment on amorphous products of glycine-nitrate combustion.

关键词： Crystal structure Rare earth compounds Perovskites Nanomaterials Magnetic materials