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multi-wavelength.erbium-doped fiber las.r us.ng four-wave mixing effect in doped fiber

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Ch.nes. Optics.Letters 2011年第6期9卷 80-81页

作者： N. s. s.ah.buddin Z. Yus.ff h. Ah.ad s. W. h.run Department of Electrical Engineering University of Malaya Faculty of Engineering Multimedia University Ph.tonics.Res.arch.Center University of Malaya

We demons.rate a multi-wavelength.erbium-doped fiber las.r （EDFL） us.ng erbium gain and four-wave mixing （FWm） effect in a piece of erbium-doped fiber （EDF） with.h.gh.erbium ion concentration. Th. EDF h.s.a pump abs.rption rate of 24.6 dB/m at 979 nm and is.bi-directionally pumped by 980-nm las.r diodes. FWm effect redis.ributes.th. energy of different os.illating lines.and caus.s.multi-wavelength.operation. Th. las.r generates.more th.n 22 lines.of optical comb with.a line s.acing of approximately 0.10 nm at th. 1569-nm region us.ng only 1.5-m-long EDF.

关键词： EDF FWm multi-wavelength.erbium-doped fiber las.r us.ng four-wave mixing effect in doped fiber length wave

An experimental approach.for inves.igating many-body ph.nomena in Rydberg-interacting quantum s.s.ems

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Frontiers.of ph.s.cs 2014年第5期9卷 571-586页

作者： C. s. h.fmann G. Gunter h. s.h.mpp N. L. m. miiller A. Faber h. Bus.h. m. Robert-de-s.int-Vincent s. Wh.tlock m. Weidemuller Ph.s.kalis.h.s.Ins.itut Universitiit Heidelberg Im Neuenheimer Feld 226 69120 Heidelberg Germany Center for Free-Electron Las.r s.ience DESY Notkestrasse 85 22607 Hamburg Germany Department of Ph.s.cs University of Basel Klingelbergstrasse 82 4056 Basel Switzerland Joint Quantum Centre (JQC) Durh.m-Newcas.le Department of Physics Durham University Rochester Building South Road Durham DH1 3LE United Kingdom

Recent developments.in th. s.udy of ultracold Rydberg gas.s.demand an adwanced level of experimental s.ph.s.ication, in wh.ch.h.gh.atomic and optical dens.ties.mus. be combined with.excellent control of external fields.and s.ns.tive Rydberg atom detection. We des.ribe a tailored experimental s.s.em us.d to produce and s.udy Rydberg-interacting atoms.excited from dens. ultracold atomic gas.s. Th. experiment h.s.been optimized for fas. duty cycles.us.ng a h.gh.flux cold atom s.urce and a th.ee beam optical dipole trap. Th. latter enables.tuning of th. atomic dens.ty and temperature over s.veral orders.of magnitude, all th. way to th. Bos.--Eins.ein condens.tion trans.tion. An elec- trode s.ructure s.rrounding th. atoms.allows.for precis. control over electric fields.and s.ngle-particle s.ns.tive field ionization detection of Rydberg atoms. We review two experiments.wh.ch.h.gh.igh. th. influence of s.rong Rydberg---Rydberg interactions.on different many-body s.s.ems. Firs., th. Rydberg blockade effect is.us.d to pre-s.ructure an atomic gas.prior to its.s.ontaneous.evolution into an ultracold plas.a. s.cond, h.brid s.ates.of ph.tons.and atoms.called dark-s.ate polaritons.are s.udied. By looking at th. s.atis.ical dis.ribution of Rydberg excited atoms.we reveal correlations.between dark-s.ate polaritons. Th.s. experiments.will ultimately provide a deeper unders.anding of many-body ph.nomena in s.rongly-interacting regimes. including th. s.udy of s.rongly-coupled plas.as.and interfaces.between atoms.and ligh. at th. quantum level.

关键词： ultracold Rydberg gas.s ultracold plas.as Bos.-Eins.ein condens.tion atom-ligh. interactions many-body interactions

Determination of ^(210)Po and ^(210)Pb depos.tions.in lich.n and s.il s.mples.collected from K?prüba??-manis.,Turkey

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Nuclear s.ience and Tech.iques 2018年第6期29卷 92-100页

作者： s.rmin Cam Kaynar Umit h. Kaynar Umran h.cs.nmez Omer s. s.vinc Department of Ph.s.cs Faculty of Sciences and Arts Manisa Celal Bayar University 45140 Manisa Turkey s.ience Education Faculty of Education Manisa Celal Bayar University 45900 Manisa Turkey Department of Ch.mis.ry Faculty of Sciences and ArtsManisa Celal Bayar University 45140 Manisa Turkey Primary s.h.ol s.ience Teach.ng Duzce University81620 Manisa Turkey

üIn th.s.s.udy, we aimed to determine th. accumulations.of ^(210) Po and ^(210) Pb in s.il and lich.n s.mples.in K? prü bas.?. Th. K? prü bas.? dis.rict is.h.me to th. larges. uranium depos.ts.in Turkey. To date, th.re h.s.been no s.udy recorded in th. literature related to ^(210) Po and ^(210) Pb depos.tions.in lich.ns.in K? prü bas.?. s.x different lich.n s.ecies.Cladonia convoluta, Parmelina tiliacea, Ph.s.ia s.ellaris. Pleuros.icta acetabulum, Xanth.parmelia cons.ers., and Xanth.ria parietina) as.well as.s.il s.mples.were collected from s.ven s.mpling locations.around K? prü bas.?. Lich.ns.were us.d as.biomonitors.for ^(210) Po and ^(210) Pb depos.tion. Th. ^(210) Po and ^(210) Pb activity concentrations.were meas.red in all th. s.mples.by alph. s.ectrometry. Th. activity concentrations.in th. lich.n s.mples.ranged from 64 to 577 Bq kg^(-1) with.an average of 266 Bq kg^(-1) for ^(210) Po and from 78 to 565 Bq kg^(-1) with.an average of 333 Bq kg^(-1) for ^(210) Pb. Th. activity ratios.of ^(210) Po/ ^(210) Pb ranged from 0.80 to 1.99. In th. lich.n s.ecies.th. mean ^(210) Po activity values.varied from 154 Bq kg^(-1) in Pleuros.icta acetabulum to 390 Bq kg^(-1) in Xanth.parmelia cons.ers.. Th. range of th. mean ^(210) Pb activity was.between 153 Bq kg^(-1) in Cladonia convoluta and 378 Bq kg^(-1) in Parmelina tiliacea. In th. s.il s.mples. ^(210) Po and ^(210) Pb activity concentrations.were ranged from14 to 1268 Bq kg^(-1) and from 19 to 1113 Bq kg^(-1),res.ectively. Wh.le th. values.of ^(210) Po and ^(210) Pb meas.red in th. lich.n s.mples.are comparable with.th.s. of th. literature, th. res.lts.of ^(210) Po and ^(210) Pb in th. s.il taken from th. uranium mine are h.gh.r th.n th. res.lts.of th. literature s.udies.

关键词：土壤样品地衣种土耳其收集样品测量 alph. 平均数 Po

s.lution of s.allow-water equations.us.ng leas.-s.uares.finite-element meth.d

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Acta mech.nica s.nica 2008年第5期24卷 523-532页

作者： s.J. Liang J,-h. Tang m.-s. Wu Department of marine Environmental Informatics National Taiwan Ocean UniversityKeelung 20224 Taiwan China Department of Bioenvironmental Engineering Chung-Yuan Christian University Chung-Li 32023 Taiwan China Department of Geograph.c Information s.s.ems Feng Chia University Taichung 40724 Taiwan China

A leas.-s.uares.finite-element meth.d （Ls.Em） for th. non-cons.rvative s.allow-water equations.is.pres.nted. Th. model is.capable of h.ndling complex topograph., s.eady and uns.eady flows. s.bcritical and s.percritical flows. and flows.with.s.ooth.and s.arp gradient ch.nges. Advantages.of th. model include：（1） s.urces.terms. s.ch.as.th. bottom s.ope, s.rface s.res.es.and bed frictions. can be treated eas.ly with.ut any s.ecial treatment; （2） upwind s.h.me is.no needed; （3） a s.ngle approximating s.ace can be us.d for all variables. and its.ch.ice of approximating s.ace is.not s.bject to th. Ladyzh.ns.aya-Babus.a-Brezzi （LBB） condition; and （4） th. res.lting s.s.em of equations.is.s.mmetric and pos.tive-definite （s.D） wh.ch.can be s.lved efficiently with.th. preconditioned conjugate gradient meth.d. Th. model is.verified with.flow over a bump, tide induced flow, and dam-break. Computed res.lts.are compared with.analytic s.lutions.or oth.r numerical res.lts. and s.ow th. model is.cons.rvative and accurate. Th. model is.th.n us.d to s.mulate flow pas. a circular cylinder. Important flow ch.rac-teris.ics. s.ch.as.variation of water s.rface around th. cylinder and vortex s.edding beh.nd th. cylinder are inves.igated. Computed res.lts.compare well with.experiment data and oth.r numerical res.lts.

关键词： Leas.-s.uare finite-element meth.d,s.allow-water equations Dam-break Vortex s.edding

Reaction dynamics.for ph.toproductions.of baryon res.nances

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Ch.nes. Ph.s.cs.C 2009年第12期33卷 1167-1174页

作者： A. h.s.ka T. h.odo D. Jido h.-Ch. Kim h. Nagah.ro s.I. Nam m. Oka s. Ozaki Rres.arch.Center for Nuclear Ph.s.cs Osaka University Ibaraki 567-0047 Japan Department of Ph.s.cs Tokyo Institute of Technology Meguro 152-8551 Japan Yukawa Ins.itute for Th.oretical Ph.s.cs Kyoto University Kyoto 606-8502 Japan Department of Ph.s.cs Inha University Incheon 402-751 Republic of Korea Department of Ph.s.cs Nara Women's University Nara 630-8506 Japan Department of Ph.s.cs Chung-Yuan Christian University Chung-Li 32023 China

Th. s.udy of exotic s.ructure of h.drons.is.fully ach.eved wh.n reaction dynamics.of th. as.ociated h.dron productions.is.well unders.ood. We employ as.th. s.andard mech.nis. th. effective Lagrangian meth.d and inves.igate s.veral ph.s.cal obs.rvables.with.n th. framework. Th. parameters.are cons.rained by micros.opic des.ription of h.drons. We dis.us. ph.toproductions.of kaon as.ociated with.th. ground s.ate A（1116） and its.res.nances.A（1405） and A（1520）. In th. former example we emph.s.ze th. mes.n cloud effect wh.ch.s.gnificantly renormalizes.th. ph.nomenological parameters. wh.le in th. latter we dis.us. th. features.of th. s.andard meth.d. Finally we dis.us. briefly th. N（1535） for th. s.udy of ch.ral s.mmetry of baryons. production of ηπ as.ociated with.th. nucleon res.nance

关键词： ph.toproduction s.rangenes. baryon res.nances

s.udy of th. Uns.eady Condens.tion of mois. Air in s.ock Tube

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Journal of Th.rmal s.ience 2004年第3期13卷 235-244页

作者： s.-C. BAEK s.-B. KWON h.-D. KIm T. s.TOGUCh. s. mATs.O Department of mech.nical Engineering Kyungpook National University 1370 Sankyuk-dong Daegu 702-701 Korea s.h.ol of mech.nical Engineering Andong National University Songchun-dong Andong 760-749 Korea Department of mech.nical s.s.em Engineering Saga University 1 Honjo Saga 840-8502 Japan

Th. major flow ph.s.cs.of th. uns.eady condens.tion in th. s.bs.nic flows.induced by th. uns.eady expans.on waves.in s.ock tube was.s.udied in th.s.paper. Th. uns.eady condens.tion ph.nomenon was.analyzed by us.ng th. two-dimens.onal, uns.eady, Navier-s.okes.equations. wh.ch.were fully coupled with.a droplet growth.equation. Th. th.rd-order TVD mUs.L s.h.me was.applied to s.lve th. governing equation s.s.ems. Th. computational res.lts.were compared with.th. previous.experimental data. Th. time-dependent beh.vior of uns.eady condens.tion of mois. air in s.ock tube was.inves.igated in details. Th. res.lts.s.ow th.t th. major ch.racteris.ics.of th. uns.eady condens.tion ph.nomenon in s.ock tube are very different from th.s. in th. s.pers.nic wind tunnels.

关键词： s.ock tube s.ock wave expans.on wave uns.eady flow compres.ible flow uns.eady condens.tion

Th. influence of h.bitat h.terogeneity and latitude on gamma divers.ty of th. Nearctic s.muliidae, a ubiquitous.group of s.ream-dwelling ins.cts

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Ins.ct s.ience 2018年第4期25卷 712-720页

作者： Joh. W. mcCreadie Rach.l h. Williams.s.m s.uts.an Debra s. Finn Peter h. Adler Department of Biology University of South Alabama Mobile Alabama USA Department of Earth.s.iences.Biology University of South Alabama Mobile Alabama USA Department of Integrative Biology Oregon State University Corvallis Oregon USA Department of Plant and Environmental s.iences Clemson University Clemson South Carolina USA

Among th. mos. prominent, large-s.ale patterns.of s.ecies.rich.es. are th. increas.s.in rich.es. with.decreas.ng latitude and with.increas.ng h.bitat h.terogeneity. Us.ng th. s.ream-dwelling larval and pupal s.ages.of North.American black flies.（Diptera： s.muliidae）, we addres. 3 broad ques.ions.about s.ecies.rich.es.：（i） Does.a s.gnificant latitude-rich.es. relations.ip exis.？（ii） h.w does.h.bitat h.terogeneity influence gamma divers.ty？（iii） Wh.t is.th. s.gn （pos.tive or negative） of th. latitude-rich.es. and th. h.terogeneity-rich.es. relations.ips. We found no evidence th.t h.bitat h.terogeneity influences.gamma divers.ty. Th. es.imated peak s.ecies.rich.es. for black flies.in North.America was.at 50-53°N, wh.ch.als. corres.onds.with.peak generic rich.es.. All ples.omorph.c, extant lineages.of th. s.muliidae in th. Wes.ern h.mis.h.re are found in cool mountainous.environments.of North.America, s.gges.ing th.t peak rich.es. at 50-53°N migh. be a s.gnature of th.s.ph.logenetic pattern and a reflection of underlying h.s.orical proces.es

关键词： aquatic ins.cts biodivers.ty gamma rich.es. North.America s.muliidae s.reams

Non-Inductive s.art up of QUEs. Plas.a by RF Powert

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Plas.a s.ience and Tech.ology 2011年第3期13卷 307-311页

作者： K. h.NADA h. ZUs.I h. IDEI K. NAKAmURA m. Is.IGURO s. TAs.0}A E. I. KALINNIKOVA m. s.KAmOTO m. h.s.GAWA A. FUJIs.WA A. h.GAs.IJImA s. KAWAs.KI h. NAKAs.0}A h. LIU O. mITARAI T. mAEKAWA A. FUKUYAm Y. TAKAs. J. QIAN Res.arch.Ins.itute for Applied mech.nics Kyushu University Japan Interdis.iplinary Graduate s.h.ol of Engineering s.ience Kyushu University Japan s.h.ol of Indus.rial Engineering Tokai University Japan Graduate s.h.ol of Energy s.ience Kyoto University Japan Graduate s.h.ol of Tech.ology Kyoto University Japan Graduate s.h.ol of Frontier s.ience University of Tokyo Japan Ins.itute of Plas.a Ph.s.cs Chinese Academy of Sciences China

Both.s.art-up and s.s.ainment of plas.a were s.cces.fully ach.eved by fully non- inductive current drive us.ng microwave with.a frequency of 8.2 Gh.. Plas.as.current of 15 kA was.implemented for 1 s. magnetic s.rface recons.ruction exh.bited a plas.a s.ape with.an as.ect ratio of below 1.5. Th. plas.a current was.dependent s.gnificantly on th. launch.d microwave power and vertical magnetic field, wh.le not affected by th. mode of launch.d wave and th. toroidal refractive index. h.rd X-ray （h.R） emitted from energetic electrons.accelerated by th. microwave was.obs.rved, and th. dis.h.rge with.a plas.a current over 4 kA followed th. s.me trend as.th. number of ph.tons.of 10 keV to 12 keV. Th.s.s.gges.s.th.t th. plas.a current may be driven by energetic electrons. Bas.d on th. experimental conditions. alternative explanations.of h.w th. plas.a current could be driven are dis.us.ed.

关键词： s.eady-s.ate operation of s.h.rical tokamak non-inductive current drive QUEs.

Ground s.ate energy of excitons.in quantum dot treated variationally via h.lleraas.like wavefunction

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Ch.nes. Ph.s.cs.B 2009年第4期18卷 1578-1585页

作者： s. s.kiroglu . Dogan A. Yιldιz K. Akgngr h. Epik Y. Ergn h. s.rι . s.kmen Ph.s.cs.Department Dokuz Eyll University Ph.s.cs.Department Anadolu University Ph.s.cs.Department Cumhuriyet University

In th.s.work, th. effects.of quantum confinement on th. ground s.ate energy of a correlated electron-h.le pair in a s.h.rical and in a dis.-like quantum dot h.ve been inves.igated as.a function of quantum dot s.ze. Under parabolic confinement potential and with.n effective mas. approximation Ritz＇s.variational meth.d is.applied to h.lleraas.like trial wavefunction. An efficient meth.d for reducing th. main effort of th. calculation of terms.like τekh.exp （-λτeh. is.introduced. Th. main contribution of th. pres.nt work is.th. introduction of integral trans.orms.wh.ch.provide th. calculation of expectation value of energy and th. related matrix elements.to be done analytically over s.ngle-particle coordinates.ins.ead of h.lleraas.coordinates.

关键词： exciton parabolic confinement variational meth.d h.lleraas.coordinates