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Light(Science & Applications) 2021年第3期10卷 310-312页

作者： andrey L.Rogach Departm ent of Materials Science and Engineering and Centre for Functional Photonics(CFP)City University of Hong KongHong Kong SARPR China

A novel concept of the heterophase optics-electronics synergistic effect has been demonstrated in a single-layerα/δ-heterophase perovskite CsPbl3 in order to realize white LEDs featuring only one broadband emissive ... 详细信息

关键词： optics synergistic white

Quantum Monte-Carlo simulation of FeAs-based superconductors

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International Journal of Modeling, Simulation, and Scientific Computing 2014年第S1期5卷 129-136页

作者： Vladimir Kashurnikov andrey Krasavin National Research Nuclear University MEPhI(Moscow Engineering Physics Institute)Kashirskoye Shosse 31 MoscowRussia

The generalized quantum Monte Carlo algorithm is developed and used to calculate the energy,occupation numbers,and correlations functions of finite FeAs clusters in the two-orbital model at finite *** coding of quantum states made it possible to take into account complex exchange terms between the *** results for the calculation of the thermodynamic characteristics of finite two-dimensional FeAs clusters simulating iron-based superconductors have been *** calculated correlation functions indicate the possibility of the effective attraction of charge carriers.

关键词： Iron-based superconductors Monte Carlo algorithm two-orbital model

Influence of beam current on microstructure of electron beam melted Ti-6Al-4V alloy

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Progress in Natural Science:Materials International 2019年第4期29卷 440-446页

作者： Roman Laptev Natalia Pushilina Egor Kashkarov Maxim Syrtanov Ekaterina Stepanova andrey Koptyug andrey Lider National Research Tomsk Polytechnic University Mid Sweden University

The defect microstructure of the samples manufactured from Ti-6A1-4V powder was studied using electron beam melting(EBM) in the beam current range of 17-13 *** hybrid digital complex combined positron lifetime spectroscopy and coincidence Doppler broadening spectroscopy was used to characterize the defect structure of the *** microstructure and defects were also analyzed by transmission electron *** has been established that the main type of the defects in the EBM manufactured samples is *** to the conducted measurements and calculations,the dislocation density in the EBM manufactured samples exceeds by two orders the similar value for the cast Ti-6Al-4 *** of Ti-Ti-Al nanoscale clusters has been found in the EBM manufactured samples.

关键词： Titanium alloy Additive technology Electron beam melting Positron spectroscopy Defects Transmission electron microscopy

Rodent burrow network dynamics under human-induced landscape transformation from desert to steppe in Kalmykian rangelands

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Integrative Zoology 2019年第4期14卷 410-420页

作者： Elena SURKOVA Sergey POPOV andrey TCHABOVSKY A.N.Severtsov Institute of Ecology and Evolution Russian Academy of SciencesMoscowRussia Department of Vertebrate Zoology Lomonosov Moscow State UniversityMoscowRussia

Rodents play an important role in rangelands through the engineering of extensive burrow systems,which provides key habitats for many animal and plant *** have analyzed the long-term variation in the abundance and distribution of rodent burrows in grazing ecosystems of southern Russia(Kalmykia)under the landscape change from desert to steppe caused by the drastic reduction of livestock after the collapse of the USSR in the early *** conducted burrow surveys in the“desert”(1980)and“steppe”(2017)periods on 193-km *** found considerable changes in burrow abundance and distribution,as well as evidence of desert habitat fragmentation and isolation caused by the expansion of tall-grass *** of the open-dwelling diurnal ground squirrel(Spermophilus pygmaeus),the dominant and the keystone species during the“desert”period,almost completely disappeared from the rodent burrow network by 2017,indicating significant habitat *** contrast,the burrows of the folivorous social vole(Microtus socialis)which was rare in the 1980s,became abundant and ubiquitously *** burrow density of the desert-dwelling psammophilous midday gerbil(Meriones meridianus)decreased,while the distances between occupied patches increased,indicating desert habitat fragmentation and loss of population *** of the folivorous tamarisk gerbils(***)were recorded only sporadically in both 1980 and *** observed changes in the rodent burrow network,the key component of grazing ecosystems,correlate with rodent species ecology and can have long-term and important consequences for ecosystem functioning.

关键词： burrows fragmentation grazing impact keystone species rodents

Chiral carbon dots:synthesis,optical properties,and emerging applications

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Light(Science & Applications) 2022年第4期11卷 542-564页

作者： Aaron Doring Elena Ushakova andrey L.Rogach Department of Materials Science and Engineering and Centre for Functional Photonics(CFP)City University of Hong Kong83 Tat Chee AvenueKowloonHong Kong SARChina. Center of Information Optical Technologies ITMO UniversitySaint Petersburg 197101Russia. Shenzhen Research Institute City University of Hong Kong518057 ShenzhenChina

Carbon dots are luminescent carbonaceous nanoparticles that can be endowed with chiral properties,making them particularly interesting for biomedical applications due to their low cytotoxicity and facile *** recent years,synthetic efforts leading to chiral carbon dots with other attractive optical properties such as two-photon absorption and circularly polarized light emission have *** start this review by introducing examples of molecular chirality and its origins and providing a summary of chiroptical spectroscopy used for its *** approaches used to induce chirality in nanomaterials are *** the main part of this review we focus on chiral carbon dots,introducing their fabrication techniques such as bottom-up and top-down chemical syntheses,their morphology,and optical/chiroptical *** then consider emerging applications of chiral carbon dots in sensing,bioimaging,and catalysis,and conclude this review with a summary and future challenges.

关键词： properties synthesis chiral

Assessment of the Design Displacement Values at Seismic Fault Crossings and of Their Excess Probability

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Journal of Mountain Science 2011年第2期8卷 228-233页

作者： STROM Alexander IVASCHENKO Alexey KOZHURIN andrey Institute of Geospheres Dynamics of Russian Academy of Sciences Institute of Oceanology of Russian Academy of Sciences Geological Institute of Russian Academy of Sciences

Line structures such as pipelines that cross active faults should be designed to retain leak-tightness if the design displacement (Ddesign) occurs. Principal approaches to the Ddesign and rupture kinematics assessment are described. They are based on relationships between earthquake magnitude, rupture length and displacement, and on the detailed field data on a specific fault that crosses the pipeline route. Since the future offset at the crossing may exceed the design value, the probability of a displacement occurrence where the safety of the structure can not be ensured should be estimated. Assessment method on such event probability is described and exemplified through active fault studies carried out at several pipeline projects in Russia.

关键词： Active Fault Surface Rupture Design Displacement Pipeline Sakhalin Island

Breeding versus survival:proximate causes of abrupt population decline under environmental change in a desert rodent,the midday gerbil(Meriones meridianus)

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Integrative Zoology 2019年第4期14卷 366-375页

作者： andrey TCHABOVSKY Ludmila SAVINETSKAYA Elena SURKOVA Laboratory for Population Ecology A.N.Severtsov Institute of Ecology and EvolutionRussian Academy of SciencesMoscowRussia

Studying abrupt ecological shifts under gradual environmental change caused,in particular,by human activity is important for understanding the fundamental aspects and underlying mechanisms of ecological *** of the rare well-documented examples of an abrupt ecological shift is the delayed step transition of the population of a desert rodent,the midday gerbil(Meriones meridianus),from high-abundance(1994-2002)to low-abundance(2003-2017)*** was in response to landscape transformation from desert to steppe caused by the drastic reduction of livestock in the rangelands of southern Russia after the collapse of the USSR in the early *** this study,we tested whether demographic parameters were correlated with the observed abrupt downward population *** found that reproductive activity(the percentage of breeding females,the number of litters,fecundity and the number of young recruited per female)showed no trend over time and did not differ between periods of high and low *** contrast,the adult sex ratio(SR=males:females)decreased significantly with time and was as much as twice more female-biased for the low-abundance population ***,SR was not related to any reproductive parameter,including the percentage of breeding fe*** conclude that proximate reasons for an abrupt population decline in *** are not associated with the changes in breeding patterns or mate limitation caused by the Allee effect but relate to the increased mortality as a result of the desert landscape being fragmented by *** mortality is expected to be higher for males as the mobile and dispersing sex.

关键词： demography landscape change rangelands reproduction threshold population dynamics

An overview of progress in Mg-based hydrogen storage films

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Chinese Physics B 2019年第9期28卷 68-77页

作者： Lyu Jinzhe andrey M Lider Viktor N Kudiiarov Division for Experimental Physics School of Nuclear Science & Engineering National Research Tomsk Polytechnic University

Mg-based hydrogen storage materials are considered to be one of the most promising solid-state hydrogen storage materials due to their large hydrogen storage capacity and low cost. However, slow hydrogen absorption/desorption rate and excessive hydrogen absorption/desorption temperature limit the application of Mg-based hydrogen storage *** present paper reviews the advances in the research of Mg-based hydrogen storage film in recent years, including the advantage of the film, the function theory of fabricating method and its functional theory, and the influencing factors in the technological process. The research status worldwide is introduced in detail. By comparing pure Mg, Pd-caped Mg, nonpalladium capped Mg, and Mg alloy hydrogen storage films, an ideal tendency for producing Mg-based film is pointed out,for example, looking for a cheap metal element to replace the high-priced Pd, compositing Mg film with other hydrogen storage alloy of catalytic elements, and so on.

关键词： Mg-based hydrogen storage film Pd-caped Mg film Mg alloy film interlayer intermetallic cooperative effect

Lateralization in monogamous pairs:wild geese prefer to keep their partner in the left hemifield except when disturbed

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Current Zoology 2021年第4期67卷 419-429页

作者： Elmira Zaynagutdinova Karina Karenina andrey Giljov Department of Vertebrate Zoology Faculty of BiologySaint Petersburg State UniversityUniversitetskaya nab.7-9St Petersburg199034Russia

Behavioural lateralization,which reflects the functional specializations of the two brain hemispheres,is assumed to play an important role in cooperative intraspecific ***,there are few studies focused on the lateralization in cooperative behaviours of individuals,especially in a natural *** the present study,we investigated Iateralized spatial interactions between the partners in life-long monogamous *** male-female pairs of two geese species(barnacle,Branta leucopsis,and white-fronted,Anser albifrons geese),were observed during different stages of the annual cycle in a variety of *** geese flocks,we recorded which visual hemifield(left/right)the following partner used to monitor the leading partner relevant to the type of behaviour and the disturbance *** a significant majority of pairs,the following bird viewed the leading partner with the left eye during routine behaviours such as resting and feeding in undisturbed *** behavioural lateralization,implicating the right hemisphere processing,was consistent across the different aggregation sites and years of the *** contrast,no significant bias was found in a variety of geese behaviours associated with enhanced disturbance(when alert on water,flying or fleeing away when disturbed,feeding during the hunting period,in urban area feeding and during moulting).We hypothesize that the increased demands for right hemisphere processing to deal with stressful and emergency situations may interfere with the manifestation of lateralization in social interactions.

关键词： hemispheric dominance left eye bias visual lateralization social behaviour monogamy anthropogenic disturbance

Local Observables and Renormalization in Dirac–Segal Approach to QFT

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Communications in Mathematics and Statistics 2014年第2期2卷 155-161页

作者： andrey Losev Scientific Research Institute of System Development and National Research University“Higher School of Economics” MoscowRussia

We explain the Dirac–Segal approach to quantum field *** study local observables in this approach and the theory of *** found out that this theory of deformation in the second-order coincides with the renormalization... 详细信息

关键词： Quantum field theory Segal axioms Renormalization