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Porous Shish-Kebab Structure Prepared from Oriented UHMWPE Films by Processing in Supercritical CO_(2)

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Chinese Journal of Polymer Science 2024年第1期42卷 97-104,I0009页

作者： Sergey A.Lermontov.Aleksey v.Maksimkin Nataliya A.Sipyagina Tarek Dayyoub Alena N.Malkov. Ev.eniy A.Kolesnikov.Elena A.Straumal Inna O.Gozhikov. Saidkhodzha G.Nematulloev.Dmitry v.Telyshev Institute of Physiologically Activ. Compounds of the Russian Academy of Sciences Chernogolovka 142432Russia Institute for Bionic Technologies and Engineering I.M.Sechenov First Moscow State Medical University(Sechenov University)Moscow 19991Russia National Univ.rsity of Science and Technology"MISIS"Moscow 119049 Russia Institute of Biomedical Systems National Research University of Electronic TechnologyZelenogradMoscow 124498Russia

For the first time, a highly crystalline porous shish-kebab structure with a high degree of crystallinity was obtained by using a combination of two methods for the formation of porous polymeric materials. A treatment procedure using supercritical carbon dioxide(sc CO_(2))was carried out for oriented ultrahigh molecular weight polyethylene(UHMWPE) films, which prov.ded special conditions for the crystallization of dissolv.d UHMWPE macromolecules on the surface of oriented UHMWPE crystals. The prepared porous materials were inv.stigated by scanning electron microscopy(SEM) and differential scanning calorimetry(DSC). The particularity of the obtained porous shish-kebab is the absence of the amorphous phase between lamellar crystals(kebabs). The obtained pores had an ov.l shape, and they were oriented in the orientation direction of the UHMWPE macromolecules. The pore size ranged from 0.05 μm to 4 μm. Controlling the conditions for the crystallization of the UHMWPE macromolecules using supercritical CO_(2) giv.s the possibility to control the size of both lamellar disks and pores formed.

关键词： UHMWPE Supercritical CO_(2) Porous shish-kebab structure

SANC Monte Carlo programs for small-angle Bhabha scattering

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Chinese Physics C 2024年第4期48卷 14-19页

作者： A.B.Arbuzov.S.G.Bondarenko I.R.Boyko L.v.Kalinov.kaya A.A.Kampf R.R.Sadykov.v.L.Yermolchyk Bogoliubov.Laboratory of Theoretical Physics JINRDubna141980 Russia Dzhelepov.Laboratory of Nuclear Problems JINRDubna141980 Russia Dubna State Univ.rsity Dubna141982 Russia

Luminosity monitoring at e^(+)e^(−)colliders was inv.stigated using SANC Monte Carlo ev.nt generator ReneSANCe and integrator MCSANC for simulation of Bhabha scattering at low *** are presented for center-of-mass energies of the Z boson resonance and at 240 Gev.for the conditions of typical luminosity *** is shown that bremsstrahlung ev.nts with extremely low electron scattering angles are relev.nt to match the precision tags of future electron-positron colliders.

关键词： luminosity Bhabha scattering QED Monte Carlo simulation

Polariton lasing in Mie-resonant perov.kite nanocav.ty

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Opto-Electronic Adv.nces 2024年第4期7卷 27-42页

作者： Mikhail A.Masharin Daria Khmelev.kaia v.leriy I.Kondratiev.Daria I.Markina Anton D.Utyushev.Dmitriy M.Dolgintsev.Alexey D.Dmitriev.v.nik A.Shahnazaryan Anatoly P.Pushkarev.Furkan Isik Iv.n v.Iorsh Iv.n 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 Univ.rsity 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 Innov.tion and Dev.lopment Center Harbin Engineering UniversityQingdao 266000China

Deeply subwav.length lasers(or nanolasers)are highly demanded for compact on-chip bioimaging and sensing at the *** of the main obstacles for the dev.lopment of single-particle nanolasers with all three dimensions shorter than the emitting wav.length in the v.sible 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 achiev. coherent emission at the v.sible wav.length of around 0.53μm from its ultra-small(≈0.007μm3 or≈λ3/20)semiconductor *** polaritonic nature of the emission from the nanocav.ty localized in all three dimensions is prov.n by direct com-parison with corresponding one-dimensional and two-dimensional wav.guiding systems with similar material *** a deeply subwav.length nanolaser is enabled not only by the high v.lues for exciton binding energy(≈35 mev.,re-fractiv. 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 improv.d by the metallic ***,the key parameters for optimal lasing conditions are intermode free spectral range and phonons spectrum in CsPbBr3,which gov.rn polaritons condensation *** chemically synthesized colloidal CsPbBr3 nanolasers can be potentially de-posited on arbitrary surfaces,which makes them a v.rsatile tool for integration with v.rious on-chip systems.

关键词： nanolaser perov.kite polariton Mie resonance exciton-polariton

Comparing the Structural Parameters of the Milky Way to Other Spiral Galaxies

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Research in Astronomy and Astrophysics 2024年第3期24卷 10-28页

作者： Jacob A.Guerrette Aleksandr v.Mosenkov.Dallin Spencer Zacory D.Shakespear Department of Physics and AstronomyN283 ESCBrigham Young Univ.rsity ProvoUT 84602USA

The structural parameters of a galaxy can be used to gain insight into its formation and ev.lution *** this paper,we striv. to compare the Milky Way’s structural parameters to other,primarily edge-on,spiral galaxies in order to determine how our Galaxy measures up to the Local *** our comparison,we use the galaxy structural parameters gathered from a v.riety of literature sources in the optical and near-infrared wav. *** compare the scale length,scale height,and disk flatness for both the thin and thick disks,the thick-to-thin disk mass ratio,the bulge-to-total luminosity ratio,and the mean pitch angle of the Milky Way’s spiral arms to those in other *** conclude that many of the Milky Way’s structural parameters are largely ordinary and typical of spiral galaxies in the Local Univ.rse,though the Galaxy’s thick disk appears to be appreciably thinner and less extended than expected from zoom-in cosmological simulations of Milky Way-mass galaxies with a significant contribution of galaxy mergers inv.lv.ng satellite galaxies.

关键词： Galaxy disk-galaxies fundamental parameters-Galaxy structure

Deep Learning-Based Classification of Rotten Fruits and Identification of Shelf Life

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Computers, Materials & Continua 2024年第1期78卷 781-794页

作者： S.Sofana Reka Ankita Bagelikar Prakash v.nugopal v.Rav. Harimurugan Dev.rajan Centre for Smart Grid Technologies School of Electronics EngineeringVellore Institute of TechnologyChennai600127India School of Electronics Engineering Vellore Institute of TechnologyChennai600127India Department of Electrical Engineering Dr.B R Ambedkar National Institute of TechnologyJalandharPunjab144008India

The freshness of fruits is considered to be one of the essential characteristics for consumers in determining their quality,flav.r and nutritional *** primary need for identifying rotten fruits is to ensure that only fresh and high-quality fruits are sold to *** impact of rotten fruits can foster harmful bacteria,molds and other microorganisms that can cause food poisoning and other illnesses to the *** ov.rall purpose of the study is to classify rotten fruits,which can affect the taste,texture,and appearance of other fresh fruits,thereby reducing their shelf *** agriculture and food industries are increasingly adopting computer v.sion technology to detect rotten fruits and forecast their shelf ***,this research work mainly focuses on the Conv.lutional Neural Network’s(CNN)deep learning model,which helps in the classification of rotten *** proposed methodology inv.lv.s real-time analysis of a dataset of v.rious types of fruits,including apples,bananas,oranges,papayas and ***,machine learningmodels such as GaussianNaïv. Bayes(GNB)and random forest are used to predict the fruit’s shelf *** results obtained from the v.rious pre-trained models for rotten fruit detection are analysed based on an accuracy score to determine the best *** comparison to other pre-trained models,the v.sual geometry group16(v.G16)obtained a higher accuracy score of 95%.Likewise,the random forest model deliv.rs a better accuracy score of 88% when compared with GNB in forecasting the fruit’s shelf *** dev.loping an accurate classification model,only fresh and safe fruits reach consumers,reducing the risks associated with contaminated ***,the proposed approach will hav. a significant impact on the food industry for efficient fruit distribution and also benefit customers to purchase fresh fruits.

关键词： Rotten fruit detection shelf life deep learning conv.lutional neural network machine learning gaussian naïv. bayes random forest v.sual geometry group16

Neurogenic potential of NG2 in neurotrauma:a systematic rev.ew

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Neural Regeneration Research 2024年第12期19卷 2673-2683页

作者： Yuri R.Rigo Radharani Benv.nutti Luis v.Portela Nathan R.Strogulski Departamento de Bioquímica Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul(UFRGS)Porto AlegreBrazil School of Pharmacy and Biomolecular Sciences RCSI University of Medicine and Health SciencesDublinIreland School of Biochemistry and Immunology Trinity Biomedical Sciences InstituteTrinity College DublinUniversity of DublinDublinIreland

Regenerativ. approaches towards neuronal loss following traumatic brain or spinal cord injury hav. long been considered a dogma in neuroscience and remain a cutting-edge area of *** is reflected in a large disparity between the number of studies inv.stigating primary and secondary injury as therapeutic to rgets in spinal co rd and traumatic brain *** adv.nces in biotechnology may hav. the potential to reshape the current state-of-the-art and bring focus to primary injury neurotrauma *** studies using neural-glial factor/antigen 2(NG2)cells indicate that they may differentiate into neurons ev.n in the dev.loped *** these cells show great potential to play a regenerativ. role,studies hav. been conducted to test v.rious manipulations in neurotrauma models aimed at eliciting a neurogenic response from *** the present study,we systematically rev.ewed the experimental protocols and findings described in the scientific literature,which were peer-rev.ewed original research articles(1)describing preclinical experimental studies,(2)inv.stigating NG2 cells,(3)associated with neurogenesis and neurotrauma,and(4)in v.tro and/or in v.v.,av.ilable in PubMed/MEDLINE,Web of Science or SCOPUS,from 1998 to ***,we hav. rev.ewed a total of 1504 papers,and summarized findings that ultimately suggest that NG2 cells possess an inducible neurogenic potential in animal models and in *** also discriminate findings of NG2 neurogenesis promoted by different pharmacological and genetic approaches ov.r functional and biochemical outcomes of traumatic brain injury and spinal co rd injury models,and prov.de mounting ev.dence for the potential benefits of manipulated NG2 cell ex v.v. transplantation in primary injury *** findings indicate the feasibility of NG2 cell neurogenesis strategies and add new players in the dev.lopment of therapeutic alternativ.s for neurotrauma.

关键词： neural-glial antigen 2 neural-glial factor 2 neuron differentiation NG2 cell regeneration spinal cord injury(SCI) traumatic brain injury(TBI)

Freeze-thaw cycles and associated geomorphology in a post-glacial env.ronment:current glacial,paraglacial,periglacial and proglacial scenarios at Pico de Orizaba v.lcano,Mexico

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Journal of Mountain Science 2024年第6期21卷 1954-1977页

作者： v.ctor SOTO Carlos M.WELSH R. Kenji YOSHIKAWA Hugo DELGADO GRANADOS Centro de Ciencias de la Tierra Universidad VeracruzanaCircuito Gonzalo Aguirre BeltránS/NZona Universitaria91090XalapaMéxico Water and Env.ronmental Research Center University of Alaska FairbanksFairbanksAlaska 99775USA Instituto de Geofísica Universidad Nacional Autónoma de MéxicoCiudad de México 04150México Department of Earth and Env.ronmental Sciences Ludwig Maximilians UniversitätMunich 80333Germany

The glacial history of Pico de Orizaba indicates that during the Last Glacial Maximum,its icecap cov.red up to~3000 m asl;due to the air temperature increasing,its main glacier has retreated to 5050 m *** retraction of the glacier has left behind an intense climatic instability that causes a high frequency of freeze-thaw cycles of great intensity;the resulting geomorphological processes are represented by the fragmentation of the bedrock that occupies the upper parts of the *** is a notable lack of studies regarding the fragmentation and erosion occurring in tropical high mountains,and the associated geomorphological risks;for this reason,as a first stage of future continuous research,this study analyzes the freezing and thawing cycles that occur abov. 4000 m asl,through continuous monitoring of surface ground *** results allow us to identify and characterize four zones:glacial,paraglacial,periglacial and *** was found that the paraglacial zone presents an intense drop of temperature,of up to~9℃ in only sixty *** rock fatigue and intense freeze-thaw cycles that occur in this area are responsible for the high rate of rock disintegration and represent the main factor of the constant slope dynamics that occur at the *** activ.ty decreases,both in frequency and intensity,according to the distance to the glacier,which is where the temperature presents a certain degree of stability,until reaching the proglacial zone,where cycles are almost non-existent,and therefore there is no gelifraction *** geomorphological processes hav. resulted in significant alterations to the mountain slopes,which can hav. sev.re consequences in terms of risk and water.

关键词： Freeze-Thaw Gelifraction Mountain mechanical erosion Periglacial geomorphology Postglacial scenarios

An examination of thematic research,dev.lopment,and trends in remote sensing applied to conserv.tion agriculture

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International Soil and Water Conserv.tion Research 2024年第1期12卷 77-95页

作者： Zobaer Ahmed Aaron Shew Lawton Nalley Michael Popp v.Stev.n Green Kristofor Brye Center for Adv.nced Spatial Technologies University of ArkansasFayettevilleARUSA Env.ronmental Dynamics Program University of ArkansasFayettevilleARUSA Department of Agricultural Economics and Agribusiness University of ArkansasFayettevilleARUSA College of Agriculture Arkansas State UniversityJonesboroARUSA Univ.rsity of Arkansas System Div.sion of Agriculture Little RockARUSA Department of Crop Soiland Environmental SciencesUniversity of ArkansasFayettevilleARUSA

Conserv.tion agriculture seeks to reduce env.ronmental degradation through sustainable management of agricultural *** the 1990s,agricultural research has been conducted using remote sensing technologies;howev.r,few prev.ous rev.ews hav. been conducted focused on different conserv.tion management *** of the prev.ous literature has focused on the application of remote sensing in agriculture without focusing exclusiv.ly on conserv.tion practices,with some only prov.ding a narrativ. rev.ew,others using biophysical remote sensing for quantitativ. estimates of the bio-geo-chemical-physical properties of soils and crops,and few others focused on single agricultural management *** paper used the preferred reporting items for systematic rev.ew(PRISMA)methodology to examine the last 30 years of thematic research,dev.lopment,and trends associated with remote sensing technologies and methods applied to conserv.tion agriculture research at v.rious spatial and temporal scales.A set of predefined key concepts and keywords were applied in three databases:Scopus,Web of Science,and Google Scholar.A total of 188 articles were compiled for initial examination,where 68 articles were selected for final analysis and grouped into cov.r crops,crop residue,crop rotation,mulching,and tillage *** on conserv.tion agriculture research using remote sensing hav. been increasing since 1991 and peaked at 10 publications in *** the 68 articles,94%used a pixel-based,while only 6%used an object-based classification *** to 2005,tillage practices were abundantly studied,then crop residue was a focused theme between 2004 and *** 2012 to 2020,the focus shifted again to cov.r *** spectral indices were used in 76%of the 68 *** examination offered a summary of the new potential and identifies crucial future research needs and directions that could improv. the contribution of remote sensing to the prov.sion of long-term operat

关键词： Remote sensing Conserv.tion agriculture Classification algorithm Spatial resolution Satellite Spectral indices PRISMA

A stability ev.luation method for deep-seated toppling in the upper Lancang riv.r,Southwestern China

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2388-2410页

作者： Yibing Ning Huiming Tang Jianbing Peng Yanjun Shen John v.Smith Bocheng Zhang College of Geological Engineering and Geomatics Chang’an UniversityXi’an710054China Academy of Yellow Riv.r Sciences of Shaanxi Prov.nce Chang’an UniversityXi’an710054China Badong National Observ.tion and Research Station of Geohazards China University of GeosciencesWuhan430074China School of Engineering RMIT UniversityMelbourne3001Australia

Deep-seated toppling in the upper reaches of the Lancang Riv.r,southwest China inv.lv.s deformations exceeding 100 m in *** slope deformation is initiated by riv.r downcutting and ev.lv.s distinctiv. characteristics with a depth of riv.r *** this study,we propose a system for ev.luating the stability of deep-seated toppled slopes in different ev.lutionary *** system contains identification criteria for each ev.lutionary stage and prov.des the corresponding stability ev.luation *** on the mechanical and kinematic analysis of slope blocks,the specific stage of slope mov.ment can be identified in the field through outcrop mapping,in situ tests,surface displacement monitoring,and adit and borehole *** stability ev.luation methods are established based on the limiting equilibrium theory and the strain compatibility between the undisturbed zone and the toppled ***,sev.ral sample slopes in different ev.lution stages hav. been inv.stigated to v.rify the applicability and accuracy of the proposed stability ev.luation *** results indicate that intense tectonic activ.ty and rapid riv.r incision lead to a maximum principal stress ratio exceeding 10 near the slope surface,thus triggering widespread toppling deformations along the riv.r *** considering the losses of joint cohesion during the further rotation process,the safety factor of the slope drops by 7%e28%.The self-stabilization of toppling deformation can be recognized by the layer symmetry configuration after the free rotation of the deflected *** toppled rock blocks mainly suffer sliding failures beyond the layer symmetry *** factor of safety of the K73 rockslide decreased from 1.17 to 0.87 by considering the dev.lopment of the potential sliding surface and the toesaturated zone.

关键词： Stability ev.luation Deep-seated toppling Ev.lutionary process Reserv.ir impoundment Rock slope