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Ballistic design and testing of a composite armour reinforced by CNTs suitable for armoured vehicles

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

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

This paper is investigating the use of composite armour reinforced by nanomaterials, for the protection of light armoured(LAV) and medium armoured military vehicles(MAV), and the interaction between the composite materials and high-performance ballistic projectiles. Four armour materials, consisted of front hybrid fibre reinforced polymer cover layer, ceramic strike-face, fibre reinforced polymer intermediate layer and the metal matrix composite reinforced backplate, were manufactured and assembled by adhesive tech.ology. The proposed laminated protection system is suitable for armoured ground vehicles;however, it could be used as armour on ground, air and naval platforms. The design of the protection system, including material selection and thickness, was elaborated depending on the performance requirements of Level 4 + STANAG 4569 military standard(projectile 14.5 mm × 114 mm APi B32) and especially on a design philosophy which.is analysed with the specifications. The backplate of this new composite is a hybrid material of Metal Matrix Composite(MMC) reinforced with carbon nanotubes(CNTs), manufactured with the use of powder metallurgy tech.ique. The composite backplate material was morphologically, mech.nically and ch.mically analysed. Results show that all plates are presenting high mech.nical properties and ballistic ch.racteristics, compared to commonly used armour plates. Real military ballistic tests according to AEP-STANAG 4569 were carried out for the total composite armour systems. After the ballistic tests, AA2024-CNT3 showed the best protection results, compared with the other plates(AA2024-CNT1 and AA2024-CNT2), with the projectile being unable to fully penetrate the composite plate.

关键词： Passive armour protection Protective armour Ballistic performance hybrid composites Vehicle protection

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Phosphine/Benzocyclone-based Neutral Nickel Catalysts for Ethylene Polymerization and Copolymerization with Polar Monomers

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ch.nese 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-Sheng Li Tianjin Key Lab of Composite&Functional Materials School of Material Science and EngineeringTianjin UniversityTianjin300072China Department of ch.mistry Lomonosov Moscow State UniversityRussian Federation InstitutionLeninskie Gory 1Moscow119991Russian Federation A N Nesmeyanov institute of Organoelement Compounds Russian Academy of SciencesVavilova st.28Moscow119991Russian Federation

The efficient copolymerization of olefin with polar monomers using nickel-based catalysts presents a longstanding ch.llenge. in this contribution, three phosphine-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)h3]C_(6)h_(4)) were prepared and applied for the ethylene polymerization and copolymerization with polar monomers without any cocatalyst. The bulky substituent groups in complexes Ni2 and Ni3 contributed to high catalytic activities(up to 7.24×10^(6) and 9.04×10^(6)g·mol Ni^(-1)·h^(-1), respectively), and produced high-molecular-weight polyethylene(Mw up to 545.7 k Da). Complex Ni3 exhibited high activities for ethylene polymerization at the level of 10^(6) g·mol Ni^(-1)·h^(-1) across a wide range from 30 ℃ to 120 ℃, exhibiting excellent high temperature tolerance. These nickel complexes were also effectively employed in the copolymerization of ethylene with methyl acrylate, ethyl acrylate, butyl acrylate and lauryl acrylate, producing copolymers with high molecular weights(Mw up to 80.5 k Da) and high polar monomer incorporation(up to 8.2 mol%). Microstructure analyses revealed that the introduction of large sterically hindered substituents facilitated the incorporation of polar functional units into the polymer backbone. This study demonstrates the potential of these nickel-based catalysts for efficient copolymerization of olefin with polar monomers.

关键词： Neutral nickel catalyst Ethylene polymerization Copolymerization Polar acrylate monomers

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Solid-liquid extraction for yttrium recovery using porous polymeric resin(XAD-7) functionalized with D_(2)EhPA

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Journal of Rare Earths 2024年第9期42卷 1764-1773,I0005页

作者： P.A.Martínez-Montoya R.G.Sanch.z-Alvarado D.Y.Medina-Velazquez M.L.Carrera-Jota P.Garnica-ch.vez A.de J.Morales-Ramirez higher Sch.ol of ch.mical Engineering and Extractive industries ESIQIEIPNDepartment of Metallurgical EngineeringUPALM S/NCol.LindavistaGustavo A.Madero Cd.de MéxicoC.P07738Mexico Metropolitan Autonomous University Department of MaterialsBasic Sciences and EngineeringAv.San Pablo No.180Col.Reynosa TamaulipasCd.de MéxicoC.P02200Mexico Center for Research.and Tech.ological innovation CIITECIPNCda.de CECATIs/nSanta CatarinaAzcapotzalcoC.P02250CDMXMexico

The recovery of yttrium is proposed by applying a solid-liquid extraction process using di-2-ethyl hexylphosphoric acid(D2EhPA) as extracting *** extracting agents were supported on a macro porous polymeric resin XAD-7(solid phase).Yttrium ions extraction and disch.rge tests were performed,firstly from a synthetic aqueous solution of 100 mg/L Y(liquid phase) at 25℃ with *** effects of ph of aqueous solutions bearing yttrium,volume fraction of extracting agents and the solid/liquid(S/L)ratio on the yttrium recovery were *** most favorable conditions for yttrium ions extraction are;20 vol% D_(2)EhPA functionalized resin,ph=1.5 and an S/L ratio of 10 mg/mL The disch.rge of yttrium ions was done under the same conditions of extraction stage,using a 2 mol/L [h_(2)SO_(4)] as stripping *** to 80% yttrium is extracted,while 75% yttrium is recovered in the striping *** all experiments,the reaction equilibrium is reach.d after 20 min,and the kinetics for the extraction stage was determined as a second-order ***,experiments were carried out to disch.rge the yttriumloaded resins,and it has been determined that the best ph value to strip the Y ions is *** tests of extraction and disch.rge for yttrium ions show that the functionalized resin can work at least five cycles without decreasing its ***,the proposed process was tested in a real solution with Y ions fro m a waste fluorescent la mp powder leach.d in h_(2)SO_(4),demonstrating the ability to effectively recover yttrium,separating it from various metals from the studied residue.

关键词： Yttrium recovery Rare earth solid-liquid extraction XAD-7 resin Fluorescent lamps recycling Solid-liquid kinetics extraction

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Olefin Polymerization Behavior of Titanium(iV) Complexes with Fluorinated and Non-fluorinated Aliphatic Phenoxyimine Ligands

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ch.nese Journal of Polymer Science 2024年第1期42卷 52-62,I0007页

作者： Vladislav A.Tuskaev Kasim F.Magomedov Svetlana ch.Gagieva Dmitry A.Kurmaev Yulia V.Nelyubina Evgenii K.Golubev Maria D.Evseeva Viktor G.Vasil'ev Galina G.Nikiforova Mikh.il i.Buzin Vyach.slav S.Bogdanov Boris M.Bulych.v Department of ch.mistry M.V.Lomonosov Moscow State UniversityMoscow 119992Russian Federation A.N.Nesmeyanov institute of Organoelement Compounds Russian Academy of SciencesMoscow119991Russian Federation Enikolopov institute of Synthetic Polymer Materials Russian Academy of SciencesMoscow 117393Russian Federation

A series of Ti(Ⅳ) dich.oride and dialkoxide com plexes with phenoxyimine ligands containing fluorinated and nonfluorinated aliphatic imine fragments have been *** molecular structures of complexes 1 and 4 were established by single-crystal X-ray diffraction *** complexes adopt a distorted octahedral coordination structure around the titanium atom and two oxygen atoms are situated in trans position while two nitrogen atoms and two outgoing ligands(Cl or iPrO) are situated in cis *** of activators(MMAO-12 and combinations Et_nAiCl_(3-n)+Bu_(2)Mg) and outgoing ligand(Cl or iPrO) nature on the catalytic activity and properties of the resulting polymers was *** Ti complexes,despite the nature of the outgoing ligands(Cl or iPrO) in the presence of Al/Mg activators,was found to display a high ethylene polymerization activity in the range 1600-3830 kg_(polymer)·mol_(Ti)^(-1)·h^(-1)·atm^(-1) with a viscosity average molecular weight(M_v) value in the range 1.1×10~6-7.1×10~6 Dalton(Da).The resulting UhMWPE can be processed by a solventless method into high-strength and high-modulus oriented *** rheological ch.racteristics of a polymer melt have been *** absence of a cross-over point did not allow to compare the values of the molecular weight distribution of polymers obtained on fluorinated and non-fluorinated pre-catalysts,however,the estimation of the entanglement density is in good agreement with the mech.nical ch.racteristics of oriented film *** activation with methylalumoxane,the activity of the com plexes decreased very significantly;however,a polymer with a molecular weight of about 12 million Da was *** the process of ethylene/octene-1 copolymerization,fluorine-containing precatalysts showed a clear advantage over non-fluorinated analogues both.in activity and in comonomer content.

关键词： Fi catalysts Titanium(iV) (Co)polymerization Al/Mg co-catalyst Ultra-high molecular weight polyethylene

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intraductal Prostatic Carcinoma: Epidemiological and Anatomopathological Aspects in Dakar

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Open Journal of Pathology 2024年第2期14卷 54-63页

作者： ibou Thiam Fabrice Senghor Omar Sow Kor Ndiaye Mohamed Moustapha ch.rif Dial Anatomical Pathology Department Aristide Le Dantec University Hospital Dakar Senegal Anatomical Pathology Department Peace Hospital Ziguinchor Senegal General Surgery Department Peace Hospital Ziguinchor Senegal Anatomical Pathology Department Idrissa Pouye University Hospital Dakar Senegal

introduction: intraductal carcinoma is often associated with high-grade, high-stage adenocarcinoma. its frequency is variable and it is considered a poor prognostic factor. in our context, when prostatic carcinoma is diagnosed, pathologists do not always report the presence of this anatomopathological entity. We therefore conducted a study to determine the epidemiological and anatomopathological profile of patients with this lesion in Dakar. Materials and Methods: This is a retrospective descriptive study covering a 1-year period from January to December 2022. it focused on cases of intraductal carcinoma diagnosed among prostatic carcinomas collected in the anatomopathology laboratories of hôpital Général idrissa Pouye (hOGiP) and hôpital Militaire de Ouakam (hMO). it was based on arch.ves of anatomopathological reports, blocks and slides. A total of 200 cases of prostatic carcinoma were collated and reviewed to identify those presenting with.intraductal carcinoma according to the diagnostic criteria of Guo and Epstein. Results: 87 cases of intraductal carcinoma were found, representing 43.5% of prostatic carcinomas. The mean age was 71 years. Patients in th.ir seventh decade were the most represented, i.e. 42.5%. The majority of samples examined were biopsies (72.4%). The mean PSA level was 965.91 ng/ml, with extremes ranging from 0.03 to 10,000 ng/ml. histologically, 96.5% of cases (N = 84) were invasive prostatic carcinoma. Gleason score 8 (4 + 4) was the most common, accounting for 42.53% (N = 37). On average, the study found four (04) foci of intraductal carcinoma per specimen, with extremes ranging from 1 to 30. Dense cribriform arch.tecture accounted for 78.16%, loose cribriform for 11.5%, solid for 8.04% and micropapillary for 2.3%. Six cases (6.9%) showed foci of comedonecrosis. The vast majority of radical prostatectomies (87.5%) were classified as pT3. Node invasion and perineural sheathing were observed in 12.5% and 52.32% of cases respectively. Conclusi

关键词： intraductal Carcinoma Prostate Pathological Anatomy Senegal

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Photoproduction of the Θ^+ and its vector andaxial-vector structure

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ch.nese Physics C 2009年第12期33卷 1279-1284页

作者： h.-ch. Kim K. Goeke T. Ledwig S. i. Nam Department of Physics Inha University Incheon 402-751 Republic of Korea institut fr Theoretisch. Physik ii Ruhr-Universitt Bochum D-44780 Bochum Germany institut fr Kernphysik Universitt Mainz D-55099 Mainz Germany Department of Physics Chung-Yuan Christian University (CYCU)

We present recent investigations on the vector and axial-vector transitions of the baryon antidecuplet within the framework of the self-consistent SU（3） ch.ral quark-soliton model, taking into account the 1/No rotational and linear mscorrections. The main contribution to the electric-like transition form factor comes from the wave-function corrections. This is a consequence of the generalized Ademollo-Gatto theorem. it is also found that in general the leading-order contributions are almost canceled by the rotational 1/No corrections. The results are summarized as follows： the vector and tensor K＇NO coupling constants, gK＊N= 0.74--0.87 and fk＊N =0.53--1.16, respectively, and F→KN = 0.71 MeV, based on the result of the KN coupling constant gKne =0.83. We also show the differential cross sections and beam asymmetries, based on the present results. We also discuss the connection of present results with the original work by Diakonov, Petrov, and Polyakov.

关键词： Baryon antidecuplet vector and axial-vector transition form factors ch.ral quark-soliton model,Photoproduction of the +

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Reaction dynamics for photoproductions of baryon resonances

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ch.nese Physics C 2009年第12期33卷 1167-1174页

作者： A. hosaka T. hyodo D. Jido h.-ch. Kim h. Nagahiro S.i. Nam M. Oka S. Ozaki Rresearch.Center for Nuclear Physics Osaka University Ibaraki 567-0047 Japan Department of Physics Tokyo Institute of Technology Meguro 152-8551 Japan Yukawa institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan Department of Physics Inha University Incheon 402-751 Republic of Korea Department of Physics Nara Women's University Nara 630-8506 Japan Department of Physics Chung-Yuan Christian University Chung-Li 32023 China

The study of exotic structure of hadrons is fully ach.eved when reaction dynamics of the associated hadron productions is well understood. We employ as the standard mech.nism the effective Lagrangian method and investigate several physical observables within the framework. The parameters are constrained by microscopic description of hadrons. We discuss photoproductions of kaon associated with the ground state A（1116） and its resonances A（1405） and A（1520）. in the former example we emphasize the meson cloud effect which.significantly renormalizes the phenomenological parameters, while in the latter we discuss the features of the standard method. Finally we discuss briefly the N（1535） for the study of ch.ral symmetry of baryons. production of ηπ associated with the nucleon resonance

关键词： photoproduction strangeness baryon resonances

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identification of optimal contemporary antiemetic prophylaxis for doxorubicin-cyclophosphamide ch.motherapy in ch.nese cancer patients: post-hoc analysis of 3 prospective studies

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Cancer Biology & Medicine 2021年第3期18卷 825-832页

作者： Winnie Yeo Leung Li Thomas Kh Lau Kwai T Lai Vicky,TC ch.n Kwan h Wong ch.istopher ch.Yip Elizabeth Pang Maggie ch.ung vivian ch.n Carol ch.Kwok Joyce JS Suen Frankie KF Mo Department of Clinical Oncology Prince of Wales HospitalFaculty of MedicineHong Kong Cancer InstituteHong KongChina State Key Laboratory of Translational Oncology The Chinese University of Hong KongHong KongChina Department of Clinical Oncology Princess Margaret HospitalHong KongChina

Objective:ch.motherapy-induced nausea and vomiting(CiNV)are common with doxorubicin-cyclophosphamide(AC)*** antiemetic regimens incorporate neurokinin-1 receptor antagonist(NK1 RA),5-hydroxytryptamine type-3 receptor antagonist(5 hT3 RA),corticosteroid,and dopamine *** post-hoc analysis compared results of 3 prospective antiemetic studies conducted among ch.nese breast cancer patients who received(neo)adjuvant AC,in order to identify optimal antiemetic ***:A total of 304 patients were included:Group 1,ondansetron/dexamethasone(D1);Group 2,aprepitant/ondansetron/dexamethasone(D1);Group 3,aprepitant/ondansetron/dexamethasone(D1–3);Group 4,aprepitant/ondansetron/dexamethasone(D1–3)/olanzapine;and Group 5,netupitant/palonosetron/dexamethasone(D1–3).Antiemetic efficacies of Groups 3,4,and 5 during cycle 1 of AC were individually compared with Group *** addition,emesis outcomes of patients in Groups 3 and 5,and those of Groups 2 and 3,were ***:When comparing efficacies of a historical doublet(5 hT3 RA/dexamethasone)with triplet antiemetic regimens(NK1 RA/5 hT3 RA/dexamethasone)with/without olanzapine,complete response(CR)percentages and quality of life(QOL)in overall phase of cycle 1 AC were compared between Group 1 and the other groups:Group 1 vs.3,41.9%vs.38.3%(P=0.6849);Group 1 vs.4,41.9%vs.65.0%(P=0.0107);and Group 1 vs.5,41.9%vs.60.0%(P=0.0460).Groups 4 and 5 ach.eved a better *** comparing netupitant-based(Group 3)with aprepitant-based(Group 5)triplet antiemetics,CR percentages were 38.3%vs.60.0%,respectively(P=0.0176);Group 5 ach.eved a better *** comparing 1 day(Group 2)vs.3 day(Group 3)dexamethasone,CR percentages were 46.8%and 38.3%,respectively(P=0.3459);Group 3 had a worse ***:Aprepitant-containing triplets were non-superior to doublet ***-containing triplets and adding olanzapine to aprepitant-containing triplets were superior to ***/palono

关键词： Netupitant palonosetron aprepitant olanzapine NEPA Asians

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Peraluminous A-type granites formed through synch.onous fractionation,magma mixing,mingling,and undercooling:evidence from microgranular enclaves and host Mesoproterozoic Kanigiri granite pluton,Nellore Sch.st Belt,southeast india

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Acta Geoch.mica 2023年第4期42卷 603-636页

作者： ch.Narshimha Santosh Kumar Department of Geology Centre of Advanced StudyKumaun UniversityNainital 263001India

The field and microstructural features coupled with mineral ch.mical data from microgranular enclave(ME)and host Mesoproterozoic Kanigiri granite(KG)pluton of Nellore Sch.st Belt(NSB),Southeastern india,have been documented in order to infer the likely processes responsible for the origin and evolution of ME and host KG *** ME and host KG bear the same mineral assemblages barring the KG which.does not contain amphibole;however,they are modally *** ME in KG is originated due to multiple intrusions of ME magmas into the crystallizing host KG magma *** and textural features indicate the dynamic magma flow,mingling,and undercooling of the ME against a relatively cooler surface of host KG *** presence of NSB country rock xenoliths and its diffuse boundaries suggest the intrusive relation and marginal assimilation by the intruding KG *** occasional cumulate texture in the ME appears to have formed by the accumulation of early-formed minerals that crystallized rapidly in the ME magma *** ME shows the magmatically deform features developed due to the flowage and erosion by the subsequent intrusions of ME magma pulses into the crystallizing host KG magma *** ME amphiboles show unusual composition as ferro-edenitic hornblende to potassian-hastingsitic hornblende,that crystallized in the subalkaline-alkaline transition,low fO_(2)(reducing to mildly oxidizing)*** unusual extremely low Mg/Mg+Fe^(t)=0.015(avg.)of ME amphiboles may be related to the ch.nging physico-ch.mical(P,T,fO_(2),and h_(2)O)condition of the ME magma or they might have crystallized in equilibrium with more evolved KG *** KG(FeOt/MgO=37.04,avg.)and ME(FeO~t/MgO=77.72,avg.)biotites are siderophyllite,and buffered between QFM and NNO syn-crystallizing in the water undersaturated(h_(2O)≈3.58 wt.%in KG;≈3.53wt.%in ME),alkaline anorogenic(A-type)host magmas that were emplaced at mid-crustal(4–5 kbar;17 km)***,microtextural and mineral

关键词： Enclave Kanigiri granite Magma mixing-fractionation Nellore sch.st belt SE india

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Malaria prevalence in north-eastern Nigeria:A cross-sectional study houben ch.(1*),Fleisch.ann h^2,Gǜckel M^3

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Asian Pacific Journal of Tropical Medicine 2013年第11期6卷 865-868页

作者： houben ch.Fleisch.ann h Gckel M Diagnostic Center MMM group & Specialist hospital Yola Hospital RoadP.M.B.2266YolaAdamawa.StateNigeria Medical Mission institute Tropical MedicineHermann Schell Str 797074 WrzburgGermany helios Kliniken Sch.erin Wismarsche Str 393-39719049 SchwerinGermany

Objective:To assess the prevalence of malaria parasitemia in north-east Nigeria and to evaluate the measures for the prevention of ***:A village in north-eastern Nigeria was selected for the cross sectional study at the h.ight of the rainy season in October 2011.A total of 550 inhabitants of a hamlet were recruited for this *** obtaining the consent individuals received a structured interview and were tested for malaria parasites in th.ir blood *** testing positive for malaria were given a course of artemesinin-based combination therapy（ACT）.Results:A total of 497 inhabitants representing approximately 90 percent of the population participated:a quarter of the study group carried malaria parasitesexclusively Plasmodium falciparum（***）-representing a *** parasite rate（PfPR） of 24.5%.Besides,53/138 in the age group of 2 to ch.ldren tested positive for *** representing a PfPR2-10 value of 38.4%.Malaria control measures were used in just under a third（157/497） of this *** these measures 28/157（17.8%） still tested positive for ***:The malaria burden is overestimated for this region in north-east *** findings support an intermediate pattern of malaria *** 30%bed nets coverage for malaria control is well below the WhO estimates for 2011.

关键词： Malaria control Malaria endemicity Malaria prevalence Malaria transmission

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