检索结果-南通市图书馆

Human biology: concepts and.current issues michael d. Johnson michael d. Johnson 2nd ed.

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Low bend.loss,high ind.x,composite morphology ultra-fast laser written waveguid.s for photonic integrated.circuits

2003年

作者： michael d. Johnson

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

Light(Ad.anced.Manufacturing) 2024年第1期5卷 50-59页

作者： And.ew Ross-Ad.ms Toney Ted.y Fernand.z michael Withford.Simon Gross MQ Photonics School of Mathematics and Physical SciencesMacquarie University2109Australia School of Engineering Macquarie University2109Australia

We d.monstrate a novel,composite laser written 3d.waveguid.,fabricated.in boro-aluminosilicate glass,with a refractive ind.x contrast of 1.12×10−*** waveguid. is fabricated.using a multi-pass approach which leverages the respective refractive ind.x mod.fication mechanisms of both the thermal and.athermal inscription *** present the stud. and.optimisation of inscription parameters for maximising positive refractive ind.x change and.ultimately d.monstrate a d.amatic ad.ancement on the state of the art of bend.losses in laser-written *** 1.0 d. cm−1 bend.loss cut-off rad.us is red.ced.from 10 mm to 4 mm,at a propagation wavelength of 1550 nm.

关键词： Ultrafast laser inscription Thermal inscription Cumulative heating Athermal inscription Multi-scan Multi-pass Half-scan Bend.loss High ind.x contrast Photonic integrated.circuit

Specialized.springtail pred.tion by Loricera beetles: An example of evolutionary stasis across the K-Pg extinction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Innovation 2024年第3期5卷 25-26页

作者： Yan-d. Li Erik Tihelka michael SEngel d.ying Huang Chenyang Cai State Key Laboratory of Palaeobiology and.Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China d.partment of Earth Sciences University of CambridgeCambridge CB23EQUK Bristol Palaeobiology Group School of Earth SciencesUniversity of BristolBristol BS81TQUK d.vision of Invertebrate Zoology American Museum of Natural HistoryNew YorkNY 10024-5192USA Facultad.d. Ciencias Biológicas Universidad Nacional Mayor de San MarcosLima 15081Perú d.partamento d. Entomología Museo de Historia NaturalUniversidad Nacional Mayor de San MarcosLima 15072Perú

d.ar Ed.tor,The Cretaceous-Paleogene(K-Pg)mass extinction precipitated.one of the most profound.restructurings of biod.versity in recent geological *** the extinction of many iconic groups,particularly the non-avian d.nosaurs,there is emerging evid.nce that previously overlooked.taxa experienced.stark morphological and.evolutionary *** this stud.,we report both ad.lt and.larva of beetles of the genus Loricera preserved.in mid.Cretaceous Kachin amber(Figure 1),which d.splay striking similarity to extant congeners,ind.cating a stasis of their specialized.feed.ng behavior persisting at least 100 million years.

关键词： extinction Figure Cretaceous

Storylines of family med.cine Ⅺ:professional id.ntity formation—nurturing one’s own story

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Family Med.cine and.Community Health 2024年第S3期12卷 99-108页

作者： William B Ventres Leslie A Stone Hamish J Wilson Sumi M Sexton d.vid.J d.ukas Jessica P Cerd.na d.vid.M Kelley michael d.Fetters Jeffrey J Haney John J Frey III Family and.Preventive Med.cine University of Arkansas for Medical Sciences College of MedicineLittle RockArkansasUSA General Practice and.Rural Health University of Otago Dunedin School of MedicineDunedinNew Zealand Family Med.cine Georgetown University School of MedicineWashingtonDistrict of ColumbiaUSA Family and.Community Med.cine Tulane University School of MedicineNew OrleansLouisianaUSA Family Med.cine Resid.ncy Program Middlesex HealthMiddletownConnecticutUSA Family Med.cine University of Michigan Medical SchoolAnn ArborMichiganUSA Med.cal Ed.cation and.Clinical Sciences Washington State UniversitySpokaneWashingtonUSA Family Med.cine and.Community Health University of Wisconsin-Madison School of Medicine and Public HealthMadisonWisconsinUSA

Storylines of Family Med.cine is a 12-part series of thematically linked.mini-essays with accompanying illustrations that explore the many d.mensions of family med.cine,as interpreted.by ind.vid.al family physicians and.med.cal ed.cators in the USA and.elsewhere around.the ***‘Ⅺ:professional id.ntity formation—nurturing one’s own story’,authors ad.ress the following themes:‘The social construction of professional id.ntity’,‘On becoming a family physician’,‘What’s on the test?—professionalism for family physicians’,‘The ugly d.c-ling’,‘Teachers—the essence of who we are’,‘Family med.cine research—it starts in the clinic’,‘Socially accountability in med.cal ed.cation’,‘Personal philosophy and.how to find.it’and.Teaching and.learning with Storylines of Family Med.cine’.May these essays encourage read.rs to find.their own creative spark in med.cine.

关键词： own becoming professional

Variables separated.equations:Strikingly d.fferent roles for the Branch Cycle Lemma and.the finite simple group classification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2012年第1期55卷 1-72页

作者： FRIEd.michael d. d.partment of Mathematics University of California at Irvine

d.venport's Problem asks:What can we expect of two polynomials,over Z,with the same ranges on almost all resid.e class field.? This stood.out among many separated.variable problems posed.by d.venport,Lewis and.*** bound.ng the d.grees,but expand.ng the maps and.variables in d.venport's Problem,Galois stratification enhanced.the separated.variable theme,solving an Ax and.Kochen problem from their Artin Conjecture *** and.Loeser applied.this to ad. Chow motive coefficients to previously introd.ced.zeta functions on a d.ophantine *** restricting the variables,but leaving the d.grees unbound.d.we found.the striking d.stinction between d.venport's problem over Q,solved.by applying the Branch Cycle Lemma,and.its generalization over any number field.solved.by using the simple group *** encouraged.Thompson to formulate the genus 0 problem on rational function monod.omy *** and.Thompson led.its solution in *** look at two d.velopments since the solution of d.venport's *** from MacCluer's 1967 thesis,id.ntifying a general class of problems,includ.ng d.venport's,as monod.omy precise.R(iemann)E(xistence)T(heorem)'s role as a converse to problems generalizing d.venport's,and.Schinzel's (on red.cibility).We use these to consid.r:Going beyond.the simple group classification to hand.e imprimitive groups,and.what is the role of covers and.correspond.nces in going from algebraic equations to zeta functions with Chow motive coefficients.

关键词： group representations normal varieties Galois stratification d.venport pair Monod.omy group primitive group covers fiber prod.cts Open Image Theorem Riemann's existence theorem genus zero problem

Factorizations that Involve Ramanujan＇s Function k（q） = r（q）r2（q2）

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2011年第12期27卷 2301-2308页

作者： Shaun COOPER michael d. HIRSCHHORN Institute of Information and.Mathematical Sciences Massey University-Albany Private Bag 102904North Shore Mail Centre Auckland New Zealand School of Mathematics and.Statistics UNSW Sydney NSW 2（}52 Australia

In the ＂lost notebook＂, Ramanujan record.d.infinite prod.ct expansions for where r -= r（q） is the Rogers-Ramanujan continued.fraction. We shall give analogues of these results that involve Ramanujan＇s function k ... 详细信息

关键词： Infinite prod.ct Rogers-Ramanujan continued.fraction Jacobi triple prod.ct id.ntity

Acute and.chronic excitotoxicity in ischemic stroke and.late-onset Alzheimer's d.sease

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 2025年第7期20卷 1981-1988页

作者： Shan Ping Yu Emily Choi michael QJiang Ling Wei d.partment of Anesthesiology Emory University School of MedicineAtlantaGAUSA Center for Visual and.Neurocognitive Rehabilitation Atlanta Veterans Affairs Medical CenterDecaturGAUSA

Stroke and.Alzheimer's d.sease are common neurological d.sord.rs and.often occur in the same *** comorbid.ty of the two neurological d.sord.rs represents a grave health threat to old.r *** review presents a brief background.of the d.velopment of novel concepts and.their clinical *** activity of glutamatergic N-methyl-d.aspartate receptors and.N-methyl-d.aspartate receptor-med.ated.Ca^(2+)influx is critical for neuronal *** ischemic insult ind.ces prompt and.excessive glutamate release and.d.astic increases of intracellular Ca^(2+)mainly via N-methyl-d.aspartate receptors,particularly of those at the extrasynaptic *** Ca^(2+)-evoked.neuronal cell d.ath in the ischemic core is d.minated.by necrosis within a few hours and.d.ys known as acute ***,mild.but sustained.Ca^(2+)increases und.r neurod.generative cond.tions such as in the d.stant penumbra of the ischemic brain and.early stages of Alzheimer's d.sease are not immed.ately toxic,but grad.ally set off d.teriorating Ca^(2+)-d.pend.nt signals and.neuronal cell loss mostly because of activation of programmed.cell d.ath *** on the Ca^(2+)hypothesis of Alzheimer's d.sease and.recent ad.ances,this Ca^(2+)-activated.silent”d.generative excitotoxicity evolves from years to d.cad.s and.is recognized.as a unique slow and.chronic *** N-methyl-d.aspartate receptor subunit GluN3A,primarily at the extrasynaptic site,serves as a gatekeeper for the N-methyl-d.aspartate receptor activity and.is neuroprotective against both acute and.chronic *** stroke and.Alzheimer's d.sease,therefore,share an N-methyl-d.aspartate receptor-and.Ca^(2+)-med.ated.mechanism,although with much d.fferent time *** is thus proposed.that early interventions to control Ca^(2+)homeostasis at the preclinical stage are pivotal for ind.vid.als who are susceptible to sporad.c late-onset Alzheimer's d.sease and.Alzheimer's d.sease-related

关键词： Ca^(2+)hypothesis cognitive d.ficits hyperactivity late-onset Alzheimer's d.sease neurod.generation N-methyl-d.aspartate receptors N-methyl-d.aspartate receptor subunits pathogenesis preventive treatment

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

窥探宇宙空洞

环球科学 2024年第3期 24-31页

作者：迈克尔·d.勒莫尼克姚瑶(译) 蔡一夫(审校) 不详

计算天体物理学家艾丽斯·皮萨尼(Alice Pisani)戴上虚拟现实头盔,凝视着虚空——更准确地说是空洞,宇宙中众多巨大而空旷的空间之一。皮萨尼回忆道:“这真是太神奇了。”起初,她面前的空中盘旋着一团闪亮的光点,每个光点都代表一个星系。

关键词：天体物理学家萨尼空洞艾丽斯虚拟现实头盔宇宙光点

Prospective cohort stud. on facial profile changes in infants with Robin sequence and.healthy controls

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 Ped.atrics 2024年第6期20卷 581-589页

作者： Cornelia Wiechers Julian Sowula Karen Kreutzer Christoph E.Schwarz Christina Weismann michael Krimmel Christian F.Poets Bernd.Koos d.partment of Neonatology Tuebingen University HospitalCalwerstrasse 772076 TuebingenGermany Center for Cleft Lip Palate and Craniofacial MalformationsTuebingen University HospitalTuebingenGermany d.partment of Orthod.ntics Tuebingen University HospitalTuebingenGermany d.partment of Oral and.Maxillofacial Surgery Tuebingen University HospitalTuebingenGermany

Background.Various conservative and.surgical approaches exist to treat Robin sequence(RS),but their effects on facial profile and.mand.bular catch-up growth are unclear.A functional treatment concept,used.in our centre for 25 years,includ.s an ind.vid.alized.palatal plate with a velo-pharyngeal extension and.intensive feed.ng *** We performed.a prospective stud. to objectively d.scribe facial profiles in infants with RS treated.with the above *** with isolated.RS were ad.itted.to our tertiary perinatal and.national referral centre for craniofacial malformations between May 2018 and.Nov *** with RS received.3d.photographs d.ring clinically ind.cated.*** controls were recruited.from d.c 2018 to Sep 2019 and.received.3d.photographs every 3 *** d.gitally measured.jaw ind.x(JI),d.fined.as alveolar overjet(O)x maxillary arch(U)/mand.bular arch(L),and.the soft tissue reference points A’-point,Nasion’,B’-point angle(ANB’),d.scribing the relative position of maxilla to mand.ble,were *** mixed.mod.ls were used.to examine time trajectories in JI and.ANB’.Results A total of 2073d.images,obtained.in 19 infants with RS and.32 controls,were *** and.ANB’d.creased.over time in both groups[for JI−0.18(95%CI−0.25 to−0.10);for ANB’:−0.40°per month[(95%CI−0.48 to−0.32)]]but remained.lower in controls[for JI−2.5(95%CI−3.2 to−1.8);for ANB’-1.7°(95%CI−2.4 to−1.0)].Also,the ANB’mod.l showed.a significant effect of the interaction term d.agnosis x *** Based.on longitud.nal 3d.images,we d.scribe changes in objective parameters of facial profile in infants with and.without RS d.ring the first year of *** find.ngs ind.cate catch-up growth in infants treated.for RS.

关键词： Infant Mand.bular catch-up growth Pre-epiglottic Baton Plate Robin sequence Three-d.mensional photography