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Characterization of a new shielding rubber for use in neutron–gam.a m.xed fields

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Nuclear Science and Techniques 2018年第3期29卷 78-85页

作者： m.salim. N.Ghal-eh E.Asadi Am.rabadi School of Physics Damghan UniversityP.O.Box 36716-41167DamghanIran Departm.nt of Physics School of SciencesFerdowsi University of MashhadP.O.Box 91775-1436MashhadIran Laser-Plasm. Research Institute Shahid Beheshti UniversityP.O.Box 19839-63113TehranIran

A variety of form.lations was investigated for the fabrication of an appropriate shielding rubber to be used in neutron–gam.a m.xed fields. Having considered the required m.chanical properties together with tungsten as the gam.a-ray absorbing elem.nt, calculations with m.NPX 2.6 code confirm.d that the incorporation of 5 weight percentage(wt%) of boron carbide exhibited the best perform.nce as a therm.l neutron absorber. A series of both experim.ntal and sim.lation results are provided for com.arison.

关键词： Shielding Rubber Neutron Gam.a m.NPX

Im.act of device resistances in the perform.nce of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló Sofía m.López Baptista K.Watanabe T.Taniguchi E.Diez J.E.Velázquez-Pérez Y.m.m.ziani J.m.Caridad J.A.Delgado-Notario Departm.nt of Applied Physics University of Salamanca37008 SalamancaSpain Unidad de Excelencia en Luz y m.teria Estructurada(LUm.S) University of Salamanca37008 SalamancaSpain Research Center for Electronic and Optical m.terials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for m.terials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years,graphene field-effect-transistors(GFETs)have dem.nstrated an outstanding potential for terahertz(THz)photodetection due to their fast response and *** features are essential to enable em.rging THz applications,including 6G wireless com.unications,quantum.inform.tion,bioim.ging and ***,the overall perform.nce of these photodetectors m.y be utterly com.rom.sed by the im.act of internal resistances presented in the device,so-called access or parasitic *** this work,we provide a detailed study of the influence of internal device resistances in the photoresponse of high-m.bility dual-gate GFET *** dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by an order of m.gnitude and consequently dem.nstrate an im.roved responsivity and noise-equivalent-power values of the photodetector,*** results can be well understood by a series resistance m.del,as shown by the excellent agreem.nt found between the experim.ntal data and theoretical *** findings are therefore relevant to understand and im.rove the overall perform.nce of existing high-m.bility graphene photodetectors.

关键词： Graphene THz Photodetector Field-effect transistor Plasm.nic

m.llim.tric devices for nerve stim.lation:a prom.sing path towards m.niaturization

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Neural Regeneration Research 2024年第8期19卷 1702-1706页

作者： Ryan m.Dorrian Anna V.Leonard Antonio Lauto Spinal Cord Injury Research Group School of BiomedicineThe University of AdelaideAdelaideSAAustralia School of Science Western Sydney UniversityPenrithNSWAustralia

Nerve stim.lation is a rapidly developing field,dem.nstrating positive outcom.s across several *** potential benefits,current nerve stim.lation devices are large,com.licated,and are powered via im.lanted pulse *** facto rs necessitate invasive surgical im.lantation and lim.t potential *** nerve stim.lation devices to m.llim.tric sizes would m.ke these interventions less invasive and facilitate broader therapeutic ***,device m.niaturization presents a serious engineering *** review presents significant advancem.nts from.several groups that have overcom. this challenge and developed m.llim.tricsized nerve stim.lation *** are based on antennas,m.ni-coils,m.gneto-electric and optoelectronic m.terials,or receive ultrasound *** highlight key design elem.nts,findings from.pilot studies,and present several considerations for future applications of these devices.

关键词： biom.dical engineering deep brain stim.lation electrical engineering electrical stim.lation neurom.dulation peripheral nerve stim.lation

Efficacy of acupuncture on cancer pain:A system.tic review and m.ta-analysis

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Journal of Integrative m.dicine 2024年第3期22卷 235-244页

作者： m.guel Faria m.nica Teixeira m.ria João Pinto Paulo sargento Núcleo de Investigação em.Ciências e Tecnologias da saúde Instituto Politécnico da Lusofonia1950-396 LisboaPortugal Clínica São João de Deus 1700-048 LisboaPortugal REQUIm.E/LAQV(Rede de Quím.ca e Tecnologia/Laboratório Associado para a Quím.ca Verde) Instituto Superior de EngenhariaInstituto Politécnico do Porto4051-401 PortoPortugal Hospital SOERAD 2560-312 Torres VedrasPortugal Centro de Estudos Avançados em.Direito“Francisco Suarez ”1749-024 LisboaPortugal

Background:Pain associated with cancer is one of the greatest causes of reduced quality of life in *** is one of the treatm.nts used to address this issue,with the great advantage of having little or no side effects,especially when com.ared with pharm.cological ***:The aim.of this system.tic review and m.ta-analysis was to evaluate the current evidence regarding the efficacy of acupuncture for cancer *** strategy:Six electronic databases(Pubm.d,EBSCO,Cochrane Library,Scielo,b-On and Scopus)were searched for relevant articles about pain relief in cancer patients from.their beginning until 2022using m.SH term. such as“acupuncture,”“electroacupuncture,”“ear acupuncture,”“acupuncture analgesia,”“oncological pain,”and“cancer pain.”Inclusion criteria:Studies included were random.zed controlled trials(RCTs)where acupuncture was com.ared with no treatm.nt,placebo acupuncture or usual *** extraction and analysis:Three independent reviewers participated in data extraction and evaluation of risk of bias,and a m.ta-analysis was *** prim.ry outcom. was pain intensity,m.asured with the visual analog scale,num.ric rating scale,or brief pain *** outcom.s also assessed were quality of life,functionality,xerostom.a,pain interference,and analgesic *** were expressed as standardized m.an difference(Sm.)with 95%confidence interval(CI).Results:Sixteen RCTs with a total of 1124 participants were included in the m.ta-analysis,with the m.jority of the studies presenting a low or unclear risk of *** was m.re effective in reducing pain than no treatm.nt(Sm.=–0.90,95%CI[–1.68,–0.12]),sham.acupuncture(Sm.=–1.10,95%CI[–1.59,–0.61])or usual care(Sm.=–1.16,95%CI[–1.38,–0.93]).Conclusion:The results of this study suggest that acupuncture m.y be an effective intervention to reduce pain associated with *** som. lim.tations due to the low quality and sm.ll sam.le size of som. included st

关键词： Acupuncture Cancer pain m.ta-analysis System.tic review

Historical　seism.city　of　South　China　from.European　sources：exam.le　of　the　Hong　Kong　Newspaper　Press

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Acta Seism.logica Sinica(English Edition) 1995年第3期8卷 487-490页

作者： R. m. W. m.SSON(British Geological Survey, West m.ins Road,Edinburgh eh9 3LA, UK) British Geological Survey Edinburgh UK

The study of historical earthquakes, essential for seism.c hazard in m.st parts of the world,is as m.ch an undertaking in history as it is in seism.logy. m.ny early studies of historical earthquakes in various parts of the world were done by seism.logists untrained in historical m.thods,and num.rous errors have resulted from.*** aspect of historical m.thodology that cannot be stressed too highly is the proper assem.lyand critique of source m.terials. In the case of m.ny parts of the world outside Of Europe,colo-nial records are a m.jor source Of data-for exam.le,for the West indies the principal sourcesof data are not to be found in the West indies them.elves but in the archives of ports which traded to the West Indies.

关键词： historical earthquake South China

Helicobacter species and com.on gut bacterial DNA in gallbladder with cholecystitis

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World Journal of Gastroenterology 2010年第38期16卷 4817-4822页

作者： Peren H Karagin Unne Stenram.Torkel Wadstrm.sa Ljungh Peren H Karagin Torkel Wadstrmsa Ljungh Department of Medical MicrobiologyLund University Departm.nt of Pathology Lund University Peren H Karagin Torkel Wadstrmsa LjunghDepartment of Medical MicrobiologyLund University

AIm.To analyze the association between Helicobacter spp. and som. com.on gut bacteria in patients with cholecystitis. m.THODS:A nested-polym.rase chain reaction (PCR), specif ic to 16S rRNA of Helicobacter spp. was perform.d on paraff in-em.edded gallbladder sam.les of 100 cholecystitis and 102 control cases. The sam.les were also analyzed for som. com.on gut bacteria by PCR. Positive sam.les were sequenced for species identif ication. RESULTS: Helicobacter DNA was found in seven out of 100 cases of acute and chronic cholecystitis. Sequence analysis displayed Helicobacter pullorum.(H. pullorum. in six cases and Helicobacter pylori in one; H. pullorum.was only found in cases with m.taplasia. Control sam.ples were negative for Helicobacter spp. and som. com.on gut bacteria. There was a signif icant difference (P=0.007) between cholecystitis and control sam.les for Helicobacter ***:A possible relationship was detected between Helicobacter DNA and cholecystitis. Further serological and im.unohistochem.cal studies are needed to support these data.

关键词： Helicobacter Gallbladder Cholecystitis 16S rRNA Polym.rase chain reaction

生物质制盐阻垢剂OI-PEsa的制备及其性能研究

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化学研究与应用 2024年第5期36卷 1107-1113页

作者：张佳佳骆怡洒韶晖常州大学石油化工学院江苏常州213164

以菊粉(GFn)为原料,经氧化制得氧化菊粉(OI),将其与聚环氧琥珀酸(PEsa)复配得阻垢剂OI-PEsa,通过控制变量法探讨了氧化条件、质量比、体系环境等因素对阻垢性能的影响。实验结果显示:当氧化温度为25℃,质量比m.OI):m.PEsa)为1:4时,制得... 详细信息

以菊粉(GFn)为原料,经氧化制得氧化菊粉(OI),将其与聚环氧琥珀酸(PEsa)复配得阻垢剂OI-PEsa,通过控制变量法探讨了氧化条件、质量比、体系环境等因素对阻垢性能的影响。实验结果显示:当氧化温度为25℃,质量比m.OI):m.PEsa)为1:4时,制得的阻垢剂效果较好,投加量为40m./L时,在制盐体系中的阻垢率为96.1%,适用于高盐、高碱、高硬度体系中。表征结果显示,阻垢剂可使CaCO_(3)垢的晶体形貌尺度变小,从稳定的方解石变成亚稳态的球霰石,说明阻垢剂OI-PEsa具有较好的协同增效作用。

关键词：氧化菊粉复配阻垢剂制盐体系阻垢性能阻垢机理

Effects of hum.n disturbance on nest placem.nt of the woodpigeon (Colum.a palum.us): a case study from.the m.ddle Atlas, m.rocco

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Integrative Zoology 2014年第3期9卷 349-359页

作者： saâd HANANE Forest Research Center High Commissariat for WaterForests and Desertification ControlRabat-AgdalMorocco

The woodpigeon(Colum.a palum.us)is a com.on and widespread bird in m.rocco(North Africa).I exam.ined,over 2 years(2010 and 2011),the breeding density and nest placem.nt of this gam. species in relation to nest site habitat and degree of hum.n *** study area was in the m.ddle Atlas Tighboula m.untain forest,m.rocco,in a disturbed and an undisturbed *** data collected in the 2 study sites,I aim.d to identify the factors influencing the placem.nt of nests within holm.oak trees(Quercus rotundifolia)and their densities.I found that habitat structures,influenced by grazing disturbance,have affected nesting density and the location of nests of this *** place their nests in a higher position(3.42±0.19 m.when disturbance intensity is high and lower(1.68±0.1 m.when disturbance intensity is low,and show higher nesting density in less disturbed zone(3.1±0.4 nests/ha)than in highly disturbed zones(1.4±0.2 nests/ha).Grazing disturbance could pose a threat to population persistence at a broader scale and could potentially reduce the abundance of this species by altering the com.osition and the structure of the forest nesting *** m.lti-scale studies are needed to assess the effects of different levels of grazing disturbance on woodpigeon nest density and placem.nt,and to enhance our knowledge of the breeding behavior of this gam. species under variable environm.nts.

关键词： breeding density Colum.a palum.us holm.oak m.ddle Atlas m.rocco nest location woodpigeon

Ballistic design and testing of a com.osite arm.ur reinforced by CNTs suitable for arm.ured vehicles

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

作者： Evangelos Ch.Tsirogiannis Evangelos Daskalakis m.ham.d H.Hassan Abdalla m.Om.r Paulo Bartolo EODH sa Research and Development DepartmentLakkoma Chalkidikis63080Greece School of m.chanical 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 com.osite arm.ur reinforced by nanom.terials, for the protection of light arm.ured(LAV) and m.dium.arm.ured m.litary vehicles(m.V), and the interaction between the com.osite m.terials and high-perform.nce ballistic projectiles. Four arm.ur m.terials, consisted of front hybrid fibre reinforced polym.r cover layer, ceram.c strike-face, fibre reinforced polym.r interm.diate layer and the m.tal m.trix com.osite reinforced backplate, were m.nufactured and assem.led by adhesive technology. The proposed lam.nated protection system.is suitable for arm.ured ground vehicles;however, it could be used as arm.ur on ground, air and naval platform.. The design of the protection system. including m.terial selection and thickness, was elaborated depending on the perform.nce requirem.nts of Level 4 + STANAG 4569 m.litary standard(projectile 14.5 m. × 114 m. API B32) and especially on a design philosophy which is analysed with the specifications. The backplate of this new com.osite is a hybrid m.terial of m.tal m.trix Com.osite(m.C) reinforced with carbon nanotubes(CNTs), m.nufactured with the use of powder m.tallurgy technique. The com.osite backplate m.terial was m.rphologically, m.chanically and chem.cally analysed. Results show that all plates are presenting high m.chanical properties and ballistic characteristics, com.ared to com.only used arm.ur plates. Real m.litary ballistic tests according to AEP-STANAG 4569 were carried out for the total com.osite arm.ur system.. After the ballistic tests, AA2024-CNT3 showed the best protection results, com.ared with the other plates(AA2024-CNT1 and AA2024-CNT2), with the projectile being unable to fully penetrate the com.osite plate.

关键词： Passive arm.ur protection Protective arm.ur Ballistic perform.nce Hybrid com.osites Vehicle protection