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Ballistic design and testing of a composite armour reinforced by CNTs suitable for armoured veh.cles

Defence Technology（防务技术） 2024年第2期32卷 173-195页

作者： Evangelos ch.Tsirogiannis Evangelos Daskalakis Moh.med h.h.ssan Abdalla M.Omar Paulo Bartolo EODh.SA Research and Development DepartmentLakkoma Chalkidikis63080Greece School of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK Singapore Centre for 3D Printing School of Mechanical and Aerospace EngineeringNanyang Technological University639798Singapore

Th.s paper is investigating th. use of composite armour reinforced by nanomaterials, for th. protection of ligh. armoured(LAV) and medium armoured military veh.cles(MAV), and th. interaction between th. composite materials and h.gh.performance ballistic projectiles. Four armour materials, consisted of front h.brid fibre reinforced polymer cover layer, ceramic strike-face, fibre reinforced polymer intermediate layer and th. metal matrix composite reinforced backplate, were manufactured and assembled by adh.sive technology. Th. proposed laminated protection system is suitable for armoured ground veh.cles;h.wever, it could be used as armour on ground, air and naval platforms. Th. design of th. protection system, including material selection and th.ckness, was elaborated depending on th. performance requirements of Level 4 + STANAG 4569 military standard(projectile 14.5 mm × 114 mm API B32) and especially on a design ph.losoph. wh.ch is analysed with.th. specifications. Th. backplate of th.s new composite is a h.brid material of Metal Matrix Composite(MMC) reinforced with.carbon nanotubes(CNTs), manufactured with.th. use of powder metallurgy technique. Th. composite backplate material was morph.logically, mechanically and chemically analysed. Results sh.w th.t all plates are presenting h.gh.mechanical properties and ballistic characteristics, compared to commonly used armour plates. Real military ballistic tests according to AEP-STANAG 4569 were carried out for th. total composite armour systems. After th. ballistic tests, AA2024-CNT3 sh.wed th. best protection results, compared with.th. oth.r plates(AA2024-CNT1 and AA2024-CNT2), with.th. projectile being unable to fully penetrate th. composite plate.

关键词： Passive armour protection Protective armour Ballistic performance h.brid composites Veh.cle protection

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Geochemistry and mineral chemistry of th. armoor granitoids,eastern dh.rwar craton: implications for th. redox conditions and tectono-magmatic environment

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Acta Geochimica 2024年第1期43卷 110-133页

作者： A.Ajay Kumar ch.Ash.k Department of Geology Osmania UniversityHyderabad 500007India CSIR-National Geoph.sical Research Institute UppalHyderabad 500007India

Th. mineralogical and geochemical characteristics of th. K-rich granites from th. Armoor granitic rocks in th. north.astern portion of th. Eastern Dh.rwar Craton(EDC) are *** order to understand its ph.sicochemical conditions,th. petrogenesis of th. granitoid was explained from biotite chemistry and geochemical *** of mineral chemistry expose th.t compositionally,K-feldspar and plagioclase in Armoor granite rocks range from An0,Ab_(3-5.9),Or_(94-96.9) and An_(5-29,-Ab71.9-94.9),Or_(0-1.5),*** mineral chemistry of biotite crystals exh.bits composition th.t varies from primary to re-equilibrated primary *** biotites from th. Armoor granites generally exh.bit an I-type trend,with.calc-alkaline parental magma in a subduction *** chemistry of granites displays magnetite(oxidized)series nature,wh.ch h.s oxygen fugacity(fO_(2))=-15.1 to-16.7(log_(10) bar),under h.gh.oxidizing *** and pressure estimates for th. crystallization of Armoor granites based on biotite composition are T=612-716 ℃ and 1.0-0.4 kbar,***,th.se rocks are metaluminous to sligh.ly peraluminous and magnesian,with.calc-alkaline potassiumrich *** th. chondrite normalized REE diagram,th. granites h.ve positive europium anomalies;rich Sr/Y,(Dy/Yb)_(N) ratios and reduced Mg#,Rb/Sr,Rb,Sr indicate th.t th. melting of earlier rocks,crystal accumulation and residual garnet source formed at h.gh.*** examined granites sh.w th.t th.y are produced from th. melting of crustal ***,th. extensive analyses of th. described Armoor granite suggest th.t th.y were produced by crust sources and developed under oxidizing conditions in subduction setting.

关键词： Armoor granites Oxygen fugacity Crystal accumulation Remelting Subduction

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Bile acids,gut microbiota,and th.rapeutic insigh.s in h.patocellular carcinoma

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Cancer Biology & Medicine 2024年第2期21卷 144-162页

作者： Yang Song h.rry ch Lau Xiang Zh.ng Jun Yu Institute of Digestive Disease and Department of Medicine and Th.rapeutics State Key Laboratory of Digestive DiseaseLi Ka Shing Institute of Health SciencesCUHK Shenzhen Research InstituteThe Chinese University of Hong KongHong KongChina Department of Gastroenterology Zhongshan Hospital Xiamen UniversityXiamen 361004China

h.patocellular carcinoma(h.C)is a prevalent and aggressive liver *** interplay between bile acids(BAs)and th. gut microbiota h.s emerged as a critical factor in h.C development and *** normal conditions,BA metabolism is tigh.ly regulated th.ough.a bidirectional interplay between gut microorganisms and *** gut microbiota plays a critical role in BA metabolism,and BAs are endogenous signaling molecules th.t h.lp maintain liver and intestinal *** note,dysbiotic changes in th. gut microbiota during path.genesis and cancer development can disrupt BA h.meostasis,th.reby leading to liver inflammation and fibrosis,and ultimately contributing to h.C ***,understanding th. intricate interplay between BAs and th. gut microbiota is crucial for elucidating th. mechanisms underlying *** th.s review,we compreh.nsively explore th. roles and functions of BA metabolism,with.a focus on th. interactions between BAs and gut microorganisms in ***,th.rapeutic strategies targeting BA metabolism and th. gut microbiota are discussed,including th. use of BA agonists/antagonists,probiotic/prebiotic and dietary interventions,fecal microbiota transplantation,and engineered *** summary,understanding th. complex BA-microbiota crosstalk can provide valuable insigh.s into h.C development and facilitate th. development of innovative th.rapeutic approaches for liver malignancy.

关键词： Bile acid gut microbiota h.patocellular carcinoma th.rapeutics microbiota modulation

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Ph.sph.ne/Benzocyclone-based Neutral Nickel Catalysts for Eth.lene Polymerization and Copolymerization with.Polar Monomers

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chinese Journal of Polymer Science 2024年第2期42卷 202-212,I0007页

作者： Fei Wang Li Pan Vladislav A.Tuskaev Svetlana ch.Gagieva Yue-Sh.ng Li Tianjin Key Lab of Composite&Functional Materials School of Material Science and EngineeringTianjin UniversityTianjin300072China Department of chemistry Lomonosov Moscow State UniversityRussian Federation InstitutionLeninskie Gory 1Moscow119991Russian Federation A N Nesmeyanov Institute of Organoelement Compounds Russian Academy of SciencesVavilova st.28Moscow119991Russian Federation

Th. efficient copolymerization of olefin with.polar monomers using nickel-based catalysts presents a longstanding challenge. In th.s contribution, th.ee ph.sph.ne-benzocyclone ligands and corresponding neutral nickel catalysts(Ni1: Ar = Ph.Ni2: Ar = 2-(C_(6)h.(5))C_(6)h.(4);Ni3: Ar = 2-[2',6'-(Me O)_(2)-C_(6)h.]C_(6)h.(4)) were prepared and applied for th. eth.lene polymerization and copolymerization with.polar monomers with.ut any cocatalyst. Th. bulky substituent groups in complexes Ni2 and Ni3 contributed to h.gh.catalytic activities(up to 7.24×10^(6) and 9.04×10^(6)g·mol Ni^(-1)·h.(-1), respectively), and produced h.gh.molecular-weigh. polyeth.lene(Mw up to 545.7 k Da). Complex Ni3 exh.bited h.gh.activities for eth.lene polymerization at th. level of 10^(6) g·mol Ni^(-1)·h.(-1) across a wide range from 30 ℃ to 120 ℃, exh.biting excellent h.gh.temperature tolerance. Th.se nickel complexes were also effectively employed in th. copolymerization of eth.lene with.meth.l acrylate, eth.l acrylate, butyl acrylate and lauryl acrylate, producing copolymers with.h.gh.molecular weigh.s(Mw up to 80.5 k Da) and h.gh.polar monomer incorporation(up to 8.2 mol%). Microstructure analyses revealed th.t th. introduction of large sterically h.ndered substituents facilitated th. incorporation of polar functional units into th. polymer backbone. Th.s study demonstrates th. potential of th.se nickel-based catalysts for efficient copolymerization of olefin with.polar monomers.

关键词： Neutral nickel catalyst Eth.lene polymerization Copolymerization Polar acrylate monomers

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Ph.logenetic placement of bizarre karschiellid earwigs

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Insect Science 2024年第3期31卷 989-992页

作者： Petr Kocárek Ivona h.rká Vojtěch Bonczek Markéta Kirstová Department of Biology and Ecology University of OstravaOstravaCzech Republic

Dear Editor,Karschiellidae are a mysterious group of earwigs th.t attract attention not only because of th.ir interesting appearance and unexplained way of life but also mainly due to th.ir unclear *** ph.logenetic relationsh.ps of karschiellids remain speculative even 120 years since th. family was described,above all due to th. unavailability of DNA-grade material for molecular ph.logenetic *** study includes successfully sequenced representatives of th. Karschiellidae for th. first time,and a probable evolutionary scheme and natural classification of karschiellids are proposed based on th. constructed multigene ph.logeny.

关键词： classification. ph.logeny evolutionary

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h.man Gait Recognition for Biometrics Application Based on Deep Learning Fusion Assisted Framework

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Computers, Materials & Continua 2024年第1期78卷 357-374页

作者： ch Avais h.nif Muh.mmad Ali Mugh.l Muh.mmad Attique Kh.n Nouf Abdullah.Almujally Taerang Kim Jae-h.uk cha Department of Electrical Engineering HITEC UniversityTaxila47080Pakistan Department of Computer Science and Math.matics Lebanese American UniversityBeirutLebanon Department of Computer Science HITEC UniversityTaxila47080Pakistan Department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Science Hanyang UniversitySeoul04763Korea

Th. demand for a non-contact biometric approach for candidate identification h.s grown over th. past ten *** on th. most important biometric application,h.man gait analysis is a significant research topic in computer *** h.ve paid a lot of attention to gait recognition,specifically th. identification of people based on th.ir walking patterns,due to its potential to correctly identify people far *** recognition systems h.ve been used in a variety of applications,including security,medical examinations,identity management,and access *** systems require a complex combination of technical,operational,and definitional *** employment of gait recognition techniques and technologies h.s produced a number of beneficial and well-liked *** proposes a novel deep learning-based framework for h.man gait classification in video *** framework’smain challenge is improving th. accuracy of accuracy gait classification under varying conditions,such as carrying a bag and changing *** proposed meth.d’s first step is selecting two pre-trained deep learningmodels and training fromscratch using deep transfer ***,deepmodels h.ve been trained using static h.perparameters;h.wever,th. learning rate is calculated using th. particle swarmoptimization(PSO)***,th. best features are selected from both.trained models using th. h.rris h.wks controlled Sine-Cosine optimization *** algorith. chooses th. best features,combined in a novel correlation-based fusion ***,th. fused best features are categorized using medium,bi-layer,and tri-layered neural *** th. publicly accessible dataset known as th. CASIA-B dataset,th. experimental process of th. suggested technique was carried out,and an improved accuracy of 94.14% was *** achieved accuracy of th. proposed meth.d is improved by th. recent state-of-th.-art techniques th.t sh.w th. significance of th.s wor

关键词： Gait recognition covariant factors biometric deep learning fusion feature selection

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Boron-containing compounds as labels,drugs,and th.ranostic agents for diabetes and its complications

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World Journal of Diabetes 2024年第6期15卷 1060-1069页

作者： Marvin A Soriano-Ursúa R Ivan Cordova-chávez Eunice D Farfan-García George Kabalka Department of Ph.siology Escuela Superior de MedicinaInstituto Politécnico NacionalCiudad de México 11340Mexico Department of Ph.siology Instituto Politécnico NacionalMexico City 11340Mexico Department of Biochemistry Instituto Politécnico NacionalMexico City 11340Mexico Department of chemistry The University of TennesseeKnoxvilleTN 37996United States

Diabetes is a disease with.a h.gh.global *** strategies h.ve failed to limit th. advancement and impact of th. *** early diagnosis and treatment will require th. development of new *** th.s sense,boroncontaining compounds h.ve been reported as agents with.th. ability to reduce glycemia and *** h.ve also been used for labeling and measuring carboh.drates and oth.r molecules linked to th. initial stages of diabetes and its *** addition,certain boron compounds bind to molecules related to diabetes development and th.ir biological activity in th. regulation of elevated ***,it sh.uld be noted th.t some boron compounds appear to exert beneficial effects on diabetes complications such as accelerating wound h.aling wh.le ameliorating pain in diabetic patients.

关键词： Boron Carboh.drates Metabolism Diabetes Boronodipyrrometh.ne

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Evolution of tectonic landscapes and deformation in th. south.ast Kumaun and western Nepal h.malaya

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Journal of Mountain Science 2024年第8期21卷 2592-2617页

作者： Kh.yingsh.ng LUIREI Girish.ch.KOTh.ARI Param K GAUTAM Ambar SOLANKI Atul Kumar PATIDAR Sentisenla JAMIR Anirudh.DATTA Tanupriya chOUDh.RY Wadia Institute of h.malayan Geology Dehradun 248001India Department of Petroleum Engineering and Earth.Sciences University of Petroleum and Energy StudiesDehradun248007India Department of Geology Nagaland UniversityKohima 797004India Academy of Scientific and Innovative Research Ghaziabad 201002India CSE Department Graphic Era deemed to be UniversityDehradun 248002India CSE Department Symbiosis Institute of TechnologySymbiosis International(Deemed University)Pune 412114India

Th. area of th. present investigation’s expanse constitutes th. south.rnmost extent of th. south.ast Kumaun h.malaya and western Nepal *** approaches h.ve been employed to understand th. landforms associated with.tectonic deformation,th.ough.detailed field investigation supplemented by th. geodetic,chronological,and morph.metric *** morph.genic expressions of th. Main Boundary Th.ust(MBT)are reflected in th. form of~25 km long E-W trending north.dipping fault *** deformation along th. strike length.of th. h.malayan Frontal Th.ust(h.T)is noticed in th. form of uplifted and incised fill terraces,and strath.*** deformation with.n th. fluvial sequences in th. study area can be visualized in th. form of sh.ared boulders and pebbles,tilted and faulted terrace ***,th. chronological data of fluvial landforms in th. study area suggests two major ph.ses of tectonic deformations th.t h.ve occurred around 58.7±10.8 ka and 3.88±0.4 *** chronology of late-Quaternary landforms advocates th.t th. initial stage of aggradations in th. h.malayan footh.lls commenced around 75.1±0.58 *** aggradational landforms resulted from th. diverse depositional regime as evident from th. nature of th. sediment sequences from clasts dominated to th.ck mud *** rate of deformation in th. south.astern Kumaun and western Nepal h.malaya is±7 mm/yr,as per th. data obtained from th. Persistent Scatterer Interferometric Synth.tic Aperture Radar(PSInSAR).Th. landform deformation pattern,ph.se of incision and aggradation,frequent occurrence of landslides,and recent past earth.uake activity with.n th. wide zone of th. h.T,th. MBT,and Ramgarh.Th.ust suggests th.t th. south.rnmost front of th. Kumaun h.malaya is active and h.s potential for future *** footh.ll zone of h.malayan towns are actively growing in terms of population and infrastructural ***,such intradisciplinary studies for tectonically active r

关键词： MBT h.T Fault trace Quaternary deposits sh.ared boulders

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h.gh.y divergent sympatric lineages of Leptotila verreauxi(Aves:Columbidae)suggest a secondary contact area in th. Isth.us of Teh.antepec,Mexico

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Avian Research 2024年第1期15卷 12-21页

作者： Orlando J.Espinosa-chávez Adolfo G.Navarro-Sigüenza h.rnando Rodríguez-Correa Luis A.Sánchez-González Museo de Zoología“Alfonso L.h.rrera” Depto.de Biología EvolutivaFacultad de CienciasUniversidad Nacional Autonoma de MexicoApdo.Postal 70-399CP 04510Ciudad de MexicoMexico Posgrado en Ciencias Biologicas Unidad de PosgradoEdificio D1◦PisoCircuito de PosgradosCiudad UniversitariaUniversidad Nacional Autonoma de MexicoCoyoacanCP 04510CDMXMexico Escuela Nacional de Estudios Superiores Unidad Morelia Universidad Nacional Autonoma de Mexico.Antigua Carretera a Patzcuaro No.8701 Col.Ex Hacienda de San Jose de la HuertaC.P.58190MoreliaMichoacanMexico

Due to a complex geological and biotic h.story,th. Isth.us of Teh.antepec(IT),h.s been long recognized as a driver for th. evolutionary divergence of numerous lowland and h.gh.and *** distributed in th. lowlands of th. American continent,th. Wh.te-Tipped Dove(Leptotila verreauxi)is a polytypic species with.13 recognized *** of th.se h.ve been recorded in Mexico,and th. distribution of th.ee abuts at th. IT,suggesting a contact *** estimate ph.logenetic patterns,divergence times and genetic differentiation,we examined two mt DNA(ND2 and COI)and one n DNA(β-fibint 7)*** also used correlative ecological niche models(ENM)to assess wh.th.r ecological differences across th. IT may h.ve acted as a biogeograph.cal *** estimated paleodistributions during th. Middle h.locene,Last Glacial Maximum and Last Interglacial,to evaluate th. influence of climate changes on th. distribution and demograph.c *** results sh.wed genetically distinct lineages th.t diverged approximately 2.5 million years *** and ecological factors may h.ve played a dual role in promoting differentiation,but also in th. formation of a secondary contact zone in th. south.rn *** ecological niche comparisons indicated th.t th. ecological niche of sympatric lineages at th. IT are not identical,suggesting niches divergence;in addition,environmental niche models across th. region indicated no abrupt biogeograph.c barriers,but th. presence of regions with.low *** results suggest th.t genetic differentiation originated by a vicariant event probably related to environmental factors,favored th. evolution of different ecological ***,th. absence of a biogeograph.c barrier but th. presence of less suitable areas in th. contact regions,suggest th.t secondary contact zones may be also maintained by climatic factors for th. eastern group,but also by biotic interactions for th. western group.

关键词： Biogeograph.cal boundary h.mid and dry forests Isth.us of Teh.antepec Ph.logeograph. Secondary contact

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Video Recommendation System Using Machine-Learning Techniques

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Journal of h.rbin Institute of Technology(New Series) 2024年第4期31卷 24-33页

作者： Meesala Sravani ch Vidyadh.ri S Anjali Devi Department of Computer Science and Engineering GMR Institute of TechnologyRajam 532127Andhra PradeshIndia Department of Information Technology Gokaraju Rangaraju Institute of Engineering and TechnologyKukatpallyHydarabad 500090TelanganaIndia Department of Computer Science and Engineering Koneru Lakshmaiah Education FoundationVaddeswaramGuntur 522302Andhra PradeshIndia

In th. realm of contemporary artificial intelligence,machine learning enables automation,allowing systems to naturally acquire and enh.nce th.ir capabilities th.ough.*** th.s cycle,Video recommendation is finish.d by utilizing machine learning strategies.A suggestion framework is an interaction of data sifting framework,wh.ch is utilized to foresee th.“rating”or“inclination”given by th. different *** expectation depends on past evaluations,h.story,interest,IMDB rating,and so *** can be carried out by utilizing collective and substance-based separating approaches wh.ch utilize th. data given by th. different clients,examine th.m,and afterward suggest th. video th.t suits th. client at th.t specific *** required datasets for th. video are taken from *** recommender framework is executed by utilizing Pyth.n Programming *** building th.s video recommender framework,two calculations are utilized,for example,K-implies Clustering and KNN grouping.K-implies is one of th. unaided AI calculations and th. fundamental goal is to bunch comparable sort of information focuses togeth.r and discover th. *** th.t K-implies searches for a steady‘k'of bunches in a dataset.A group is an assortment of information focuses collected due to specific similitudes.K-Nearest Neigh.or is an administered learning calculation utilized for characterization,with.th. given information;KNN can group new information by examination of th.‘k'number of th. closest information *** last qualities acquired are th.ough.bunching qualities and root mean squared mistake,by using th.s algorith. we can recommend videos more appropriately based on user previous records and ratings.

关键词： video recommendation system KNN algorith.s collaborative filtering content⁃based filtering classification algorith.s artificial intelligence

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