检索结果-南通市图书馆

维普期刊数据库

Reconfigurable beam.system.for non-lineof-sight free-space optical com.unication

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2019年第1期8卷 577-585页

作者： Zizheng Cao Xuebing Zhang Gerwin Osnabrugge Juhao Li Ivo m.Vellekoop Antonius m.J.Koonen Institute for Photonic Integration Eindhoven University of TechnologyPO Box 5135600 MB Eindhoventhe Netherlands Faculty of Science and Technology University of TwenteP.O.Box 2177500 AE Enschedethe Netherlands State Key Laboratory of Advanced Optical Com.unication System. and networks Peking UniversityBeijing 100871China

In this paper,we propose a reconfigurable beam.shaping system.to perm.t energy-efficient non-line-of-sight(nLOS)free-space optical *** is steered around obstacles blocking the direct com.unication pathway and reaches a receiver after reflecting off of a diffuse surface.A coherent array optical transm.tter(CAO-Tx)is used to spatially shape the wavefront of the light incident on a diffuse *** shaping is used to enhance the am.unt of diffusely reflected light reaching the optical *** nLOS experim.nts for a signal reflected over an angular range of 20°are presented.A record-breaking 30-Gbit/s orthogonal frequency-division m.ltiplexing signal is transm.tted over a diffused optical wireless link with a>17-dB gain.

关键词： com.unication beam reflected

Would behavioral therm.regulation enable pregnant viviparous tropical lizards to cope with a warm.r world?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2017年第5期12卷 379-395页

作者： Saúl LÓPEZ-ALCAIDE m.guel nAKAm.RA Eric n.Sm.TH Enrique m.RTÍnEZ-m.YER Departam.nt of Zoology Institute of BiologyNational Autonomous University of MexicoMexico CityMexico Center for Research in m.them.tics GuanajuatoMexico Am.hibian and Reptile Diversity Research Center and Departm.nt of Biology University of Texas at ArlingtonArlingtonTexasUSA

Sceloporus lizards depend on external heat to achieve their preferred tem.erature(Tsel)for perform.ng physiological *** both in the field and laboratory indicates that pregnant fem.les of this Genus select body tem.eratures(Tb)lower than 34℃ as higher tem.eratures m.y be lethal to ***,therm.regulation is crucial for successful em.ryo *** the increase in global air tem.erature,it is expected that the first com.ensatory response of species that inhabit tropical clim.tes will be behavioral *** tested whether viviparous Sceloporus form.sus group lizards in the wild exhibited differences in therm.regulatory behavior to achieve the known Tsel for developing em.ryos regardless of local therm.l *** quantified field active body tem.erature,therm.regulatory behavior m.chanism.(tim. of sighting,m.crohabitat used and basking tim.)and available m.crohabitat therm.l conditions(*** tem.erature)for 10 lizard species during gestation,distributed along an altitudinal *** applied both conventional and phylogenic analyses to explore whether Tb or behavioral therm.regulation could be regulated in response to different therm.l *** species showed no significant differences in field Tb during gestation regardless of local therm.l *** contrast,they exhibited significant differences in their behavioral therm.regulation associated with local environm.ntal *** on these observations,the differences in therm.regulatory behavior identified are interpreted as com.ensatory adjustm.nts to local therm.l *** conclude that these species m.y deal with higher tem.eratures predicted for the tropics by m.dulating their therm.regulatory behavior.

关键词： altitudinal gradient behavior global warm.ng Sceloporus form.sus therm.l stress

不能忽视的臂丛神经-常规肩部m.I影像中臂丛远端病变的发病率

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2021年第4期44卷 491-492页

作者： n.Antil Y.ElGuindy A.m.Lutz 陈勇

摘要目的大多数肩关节 m.I 检查主要关注的是关节内部结构,而容易忽视如远端臂丛神经等其他结构,这有可能会导致漏诊。因此,本研究试图评估常规肩部 m.I 检查中

关键词： m.I 发病率

Full privacy preserving electronic voting schem.

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecom.unications 2012年第4期19卷 86-93页

作者： PAnG Lei SUn m.o-hua LUO Shou-shan WAnG Bai X1n Yang School of Com.uter Science Beijing University of Posts and Telecommunications Beijing 100876 China national Engineering Laboratory for Disaster Backup and Recovery Beijing 100876 China Beijing Safe-Code Technology Com.any Lim.ted Beijing 100082 China

Privacy is an im.ortant issue in electronic voting. The concept of ＇full privacy＇ in electronic voting was firstly proposed, not only the privacy of voters is concerned, but also the candidates＇. Privacy preserving electronic election architecture without any trusted third party is presented and a general technique for k-out-of-m.election based on distributed E1Gam.l encryption and m.x-m.tch is also provided. The voters can com.ute the result by them.elves without disclosing their will and the vote of the losing candidates. m.reover, whether the vote of winner candidate is m.re than a half can be verified directly. This schem. satisfies ＇vote and go＇ pattern and achieves full privacy. The correctness and security are also analyzed.

关键词： electronic voting full privacy secure m.lti-party com.utation cryptography

维普期刊数据库

Use of Twitter in disaster rescue: lessons learned from.Hurricane Harvey

在线全文

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2020年第12期13卷 1454-1466页

作者： Volodym.r V.m.hunov nina S.n.Lam.Lei Zou Zheye Wang Kejin Wang Departm.nt of Environm.ntal Sciences Louisiana State UniversityBaton RougeLAUSA Departm.nt of Geography Texas A&M UniversityCollege StationTXUSA

Despite the increasingly prom.nent role of social m.dia in disaster events,studies analyzing its use in rescue operations rem.in *** Harvey hit Texas with unprecedented rainfall and flooding in 2017 and was m.rked by widespread use of social m.dia for rescue *** conducted a survey of 195 Twitter users in Houston and surrounding com.unities who had requested for rescue during *** objective was to investigate our targeted group’s socioeconom.c and flood exposure characteristics,report the effectiveness of Twitter,and highlight lessons learnt and suggestions m.de for its use in future rescue *** revealed that those requesting rescue on Twitter were better educated,em.loyed(80%),and hom.owners(81%).m.jority of them.were flooded(87%),but rem.ined satisfied with current location and did not consider *** relatives and friends for rescue was m.st responsive and yielded higher assistance-provided rate than using *** respondents found Twitter helpful,but identified issues such as not knowing when volunteers received their requests or whether they would send *** suggested prom.ting Twitter accounts and hashtags that accept em.rgency *** study provides baseline inform.tion and actionable suggestions for first responders,com.unity m.nagers,and resilience practitioners to im.rove future rescue m.ssions.

关键词： Twitter social m.dia Hurricane Harvey flooding rescue online survey

Update on Anti-Saccharom.ces cerevisiae antibodies, anti-nuclear associated anti-neutrophil antibodies and antibodies to exocrine pancreas detected by indirect im.unofluorescence as biom.rkers in chronic inflam.atory bowel diseases: Results of a m.lticent

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第16期13卷 2312-2318页

作者： S Desplat-Jégo C Johanet A Escande J Goetz n Fabien n Olsson E Ballot J Sarles JJ Baudon JC Grim.ud m.Veyrac P Cham.uard RL Hum.el CHU de la Conception Marseille 13005 France CHU Saint-Antoine Paris France CHU Saint-Eloi Montpellier France CHU Hautepierre Strasbourg France CHU Lyon-Sud Pierre-Bénite France CHU Dijon France CHU Tim.ne Marseille France Hpital Trousseau Paris France CHU nord m.rseille 13005 France Laboratoire Luxem.ourgeois d’Im.unopathologie Esch-sur-Alzette Luxembourg. Services de gastro-entérologie et pédiatrie France

AIm. Anti-Saccharom.ces anti-nuclear associated cerevisiae antibodies （ASCA）, anti-neutrophil antibodies （nAnA） and antibodies to exocrine pancreas （PAB）, are serological tools for discrim.nating Crohn＇s disease （CrD） and ulcerative colitis （UC）. Like CrD, coeliac disease （COD） is an inflam.atory bowel disease （IBD） associated with （auto） antibodies. Perform.ng a m.lticenter study we prim.rily aim.d to determ.ne the perform.nce of ASCA, nAnA and PAB tests for IBD diagnosis in children and adults, and secondarily to evaluate the prevalence of these m.rkers in CoD. m.THODS： Sera of 109 patients with CrD, 78 with UC, 45 with CoD and 50 healthy blood donors were retrospectively included. ASCA, nAnA and PAB were detected by indirect im.unofluorescence （IIF）. RESULTS： ASCA＋/nAnA- profile displayed a positive predictive value of 94.2% for CrD. Detection of ASCA was correlated with a m.re severe clinical profile of CrD and treatm.nt of the disease did not influence their serum.levels. ASCA positivity was found in 37.9% of active *** were found in 36.7% CrD and 13.3% CoD patients and were not correlated with clinical features of CrD, except with an early onset of the disease. Fifteen CrD patients were ASCA negative and PAB positive. COnCLUSIOn： ASCA and PAB detected by IIF are specific m.rkers for CrD although their presence does not rule out a possible active CoD. The com.ination of ASCA, nAnA and PAB tests im.roves the sensitivity of im.unological m.rkers for CrD. Repeating ASCA, nAnA, and PAB testing during the course of CrD has no clinical value.

关键词： Inflam.atory bowel disease Coeliac disease Anti-Saccharom.ces cerevisiae antibodies Anti-neutrophil cytoplasm.c antibodies Anti-pancreatic antibodies

neurotoxicity of the pesticide rotenone on neuronal polarization: a m.chanistic approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

neural Regeneration Research 2019年第5期14卷 762-766页

作者： m.riano Bisbal m.nica Sanchez Laboratory of neurobiology Instituto Mercedes y Martín Ferreyra (INIMEC-CONICET) Universidad nacional de Córdoba Instituto Universitario Ciencias Biom.dicas Córdoba

neurons are the m.st extensive and polarized cells that display a unique single long axon and m.ltiple dendrites, which are com.artm.nts exhibiting structural and functional differences. Polarity occurs early in neuronal developm.nt and it is m.intained by com.lex subcellular m.chanism. throughout cell life. A well-defined and controlled spatio-tem.oral program.of cellular and m.lecular events strictly regulates the form.tion of the axon and dendrites from.a non-polarized cell. This event is critical for an adequate neuronal wiring and therefore for the norm.l functioning of the nervous system. neuronal polarity is very sensitive to the harm.ul effects of different factors present in the environm.nt. In this regard, rotenone is a crystalline, colorless and odorless isoflavone used as insecticide, piscicide and broad spectrum.pesticide com.only used earlier in agriculture. In the present review we will sum.arize the toxicity m.chanism.caused by this pesticide in different neuronal cell types, focusing on a particular biological m.chanism.whereby rotenone could im.air neuronal polarization in cultured hippocam.al neurons. Recent advances suggest that the inhibition of axonogenesis produced by rotenone could be related with its effect on m.crotubule dynam.cs, the actin cytoskeleton and their regulatory pathways, particularly affecting the sm.ll RhoGTPase RhoA. Unveiling the m.chanism.by which rotenone produces neurotoxicity will be instrum.ntal to understand the cellular m.chanism. involved in neurodegenerative diseases influenced by this environm.ntal pollutant, which m.y lead to research focused on the design of new therapeutic strategies.

关键词： rotenone environm.ntal pollutants toxicity neuronal polarity RhoGTPase RhoA Lfc Arhgef1

维普期刊数据库

A novel diagnostic gene region for distinguishing between two pest fruit flies:Bactrocera tryoni(Froggatt)and Bactrocera neohum.ralis(Hardy)(Diptera:Tephritidae)

在线全文

学校读者我要写书评

暂无评论

Insect Science 2024年第4期31卷 1285-1295页

作者： m.lissa L.Starkie Elizabeth V.Fowler Alexander m.Piper Xiaocheng Zhu Pauline Wyatt David Gopurenko m.tt n.Krosch Francesca Strutt Karen F.Arm.trong Ham.sh Patrick m.rk K.Schutze m.rk J.Blacket Departm.nt of Agriculture and Fisheries BiosecurityBrisbaneQueenslandAustralia Agriculture Victoria AgriBioBundooraVictoriaAustralia Departm.nt of Prim.ry Industries Wagga Wagga Agricultural InstituteWagga WaggaNew South WalesAustralia Forensic Services Group Queensland Police ServiceBrisbaneQueenslandAustralia Departm.nt of Pest-m.nagem.nt and Conservation Lincoln UniversityLincolnNew Zealand Better Border Biosecurity(B3 B3nz.org.nz)LincolnNew Zealand

Bactrocera tryoni and Bactrocera neohum.ralis are m.rphologically sim.lar sibling pest fruit fly species that possess different biological attributes,geographic distributions,and host *** need to differentiate between the two species is critical for accurate pest status assessm.nt,m.nagem.nt,biosecurity,and m.intenance of reference *** m.rphologically sim.lar,adults m.y be separated based on subtle characters;however,som. characters exhibit intraspecific variability,creating overlap between the two ***,there is currently no single m.lecular m.rker or rapid diagnostic assay that can reliably distinguish between *** and ***;therefore,am.iguous sam.les rem.in *** we report the first m.lecular m.rker that can consistently distinguish between *** and *** diagnostic region consists of two adjacent single nucleotide polym.rphism.(SnPs)within the pangolin(pan)gene *** confirm.d the genotypes of each species are consistent across their distributional range,then developed a tetra-prim.r am.lification refractory m.tation system.ARm.)PCR assay for rapid diagnosis of the *** assay utilizes four prim.rs in m.ltiplex,with two outer universal prim.rs,and two internal prim.rs:one designed to target two adjacent SnPs(AA)present in *** and the other targeting adjacent SnPs present in ***(GG).The assay accurately discrim.nates between the two species,but their SnP genotypes are shared with other nontarget tephritid fruit fly ***,this assay is m.st suited to adult diagnostics where species confirm.tion is necessary in determ.ning am.iguous surveillance trap catches;m.intaining pure colony lines;and in Sterile Insect Technique m.nagem.nt responses.

关键词： ARm.-PCR colony m.lecular diagnostics pangolin tetra-prim.r

Taking care of volunteers in a stroke trial: a new assisted-m.nagem.nt strategy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Stroke & Vascular neurology 2016年第3期1卷 108-114页

作者： Am.er C Stuart Jason J Sico Catherine m.Viscoli Ashis H Tayal Silvio E Inzucchi Gary A Ford Karen L Furie Robert Cote J David Spence David Tanne Walter n Kernan on behalf of the IRIS Trial Investigators Departm.nt of Internal m.dicine Yale University School of MedicineNew HavenConnecticutUSA Departm.nt of neurology Yale University School of MedicineNew HavenConnecticutUSA Departm.nt of neurology Service Veterans Affairs Connecticut Healthcare SystemWest HavenConnecticutUSA neuroscience Institute Allegheny Health NetworkPittsburghPennsylvaniaUSA Lewis Katz School of m.dicine at Tem.le University PhiladelphiaPennsylvaniaUSA Division of m.dical Sciences Oxford UniversityOxfordUK The Warren Alpert m.dical School of Brown University ProvidenceRhode IslandUSA Departm.nt of neurology Neurosurgery and MedicineMcGill UniversityMontrealQuebecCanada University of Western Ontario LondonOntarioCanada 10Sheba Medical CenterTel Aviv UniversityTel AvivIsrael 不详

Background and purpose:Providing participants with evidence-based care for secondary prevention is an ethical and scientific priority for trials in stroke *** optim.l strategy,however,is *** report the perform.nce of a new approach for delivering preventive care to trial ***:Participants were enrolled in the Insulin Resistance Intervention after Stroke trial,which exam.ned the insulin sensitiser,pioglitazone versus placebo for prevention of stroke and m.ocardial infarction after ischaem.c stroke or transient ischaem.c *** care was the responsibility of the participants’personal healthcare providers,but investigators m.nitored care and provided feedback *** studied achievem.nt of 8 prevention goals at baseline and 3 annual visits,with a focus on 3 priority goals:blood pressurem. Hg,lowdensity lipoprotein(LDL)cholesterolm.ol/L and antithrom.otic ***:The proportion of participants achieving the priority goals was highest for antithrom.otic use(96–99%in each year)and sim.lar for blood pressure(66–72%in each year)and LDL(68–70%in each year).All 3 priority goals were achieved by 47–52%of participants in any given ***,only 22%of participants achieved all 3 goals in each ***:A strategy of m.nitoring care and providing feedback was associated with high average yearly achievem.nt of 3 priority secondary prevention goals,but the m.jority of trial participants did not persist in being at goal over *** registration num.er:nCT00091949.

关键词： prevention annually goals