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Enhanced o.ange emissio. by do.ing CeB_6 in CaAlSiN_3:Ce^(3+) pho.pho. fo. applicatio. in white LEDs

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Jo.rnal o. Rare Earths 2018年第12期36卷 1250-1255页

作者： Wenjie Wu Kefu Chao.Wenquan Liu Lesi Wei Dahai Hu Taiyang Wang o. Tegus Co.lege o. Physics and Electro.ic Info.matio. Inner Mongolia Normal University Inner Mo.go.ia Key Labo.ato.y fo. Physics and Chemistry o. Functio.al Materials Leshan Vo.atio.al and Technical Co.lege

A series o. CeB6-do.ed and Ceo.-do.ed Ca1-xSiAlN3:xCe3+(deno.ed as CASN:Ce3+@CeB6 and CASN:Ce3+@Ceo., respectively) were synthesized by allo.-nitridatio. metho. under high-purity nitro.en atmo.phere. The mo.pho.o.ies, crystal phases, and luminescence pro.erties were investigated in *** an increase in the co.centratio. o. CeB6, the unit cell vo.ume o. CASN:Ce3+@CeB6slightly increases due to.the substitutio. between io.s, which leads to.a change o. micro.structure aro.nd Ce3+. CASN:Ce3+@CeB6 efficiently emits yello.-o.ange light with a maximum emissio. intensity at aro.nd 550 nm fo. the co.tent x o. 0.01(being in co.parable situatio., CASN:Ce3+@Ceo.is x = 0.04) when excited at460 nm. Co.pared with CASN:Ce3+@Ceo., the red emissio. co.po.ent o. Ce3+ in CASN:Ce3+@CeB6 is much stro.ger. This is ascribed to.energy transfer o. intra-Ce3+(within o.e Ce3+ io.) and inter-Ce3+(between Ce3+ and Ce3+ io.s). In additio., the replacements o. N3-(0.132 nm fo. CN = 4) and o.-(0.124 nm fo. CN = 4) by B2-(0.140 nm fo. CN = 4), which can lead to.a marked expansio. o. the ho.t lattice and a decrease o. the o.idatio. o. samples, are also.respo.sible fo. the increase o. red emissio. co.po.ent. Furthermo.e, CASN:Ce3+@CeB6pho.pho. has an excellent thermal stability because o. the partial substitutio. o. Ce-o.Ce-N) bo.ds by mo.e co.alent Ce-B. As a result, the o.tstanding luminescent pro.erties o. CASN:Ce3+@CeB6 pho.pho. make it practical to.use in the single pho.pho.-co.ted high-co.o.-rendering po.er white LED.

关键词： White LED Nitride CaAlSiN_3:Ce^(3+) CeB_6 Rare earths

Kno.ledge and Attitude o. Salesmen in Nigeria to.ards Telemedicine

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Jo.rnal o. Bio.ciences and Medicines 2023年第5期11卷 275-285页

作者： Emmanuel Chinedum ogu Mo.esta Ifeo.a Mbah Department o. Public Health Science National Open University of Nigeria Abuja Nigeria Department o. Medical Labo.ato.y Science Taraba State University Jalingo Nigeria

Need fo. pro.pt access to.healthcare led to.this cro.s-sectio.al study aimed to.determine the kno.ledge and attitude o. Sales men in Nigeria. It invo.ved 362 Salesmen fro. so.e selected big co.panies in three states (Taraba, Benue and Adamawa) and Abuja. An electro.ic survey prepared using Go.gle Fo.m was used to.co.lect info.matio. thro.gh so.ial media such as WhatsApp. The research to.l was validated by three experts in public health and the reliability test was do.e using Cro.bach Alpha and a 0.7 co.efficient was o.tained. The findings fro. the study revealed that 98.1% respo.dents have heard abo.t telemedicine while 98.1% agreed that mo.ile health can help especially during emergency. Ho.ever, 97.2% knew telemedicine invo.ves Live co.sultatio. and interactive sessio.s fro. a distance. Nevertheless, 95.9% knew telemedicine makes it po.sible fo. o.e to.access clinical services fro. a distance while 93.4% were aware that telemedicine has pro.isio. fo. sto.age and fo.warding, 82.9% knew telemedicine makes it po.sible fo. o.e to.easily reach medical specialists. o. their attitudes to.ards telemedicine, 49.7% and 49.4% o. the respo.dents stro.gly agreed and agreed respectively that telemedicine makes it easier fo. o.e to.reach his do.to. while 42% and 49.4% agreed and stro.gly agreed that telemedicine helps to.curb the spread o. infectio.. Ho.ever, 47% and 49.7% respectively agreed and stro.gly agreed that telemedicine enables o.e to.receive medical attentio. even at o.d ho.rs o. while in remo.e villages. Meanwhile, 42% and 49.4% respectively agreed and stro.gly agreed that telemedicine reduces co.t. Also. 44.2% and 51.9% o. the respo.dents respectively agreed and stro.gly agreed that telemedicine o.fers appro.riate medical fo.lo.-up. Nevertheless, 43.6% o. the respo.dents agreed while 52.8% stro.gly agreed that telemedicine o.fers medical attentio. while o.e is in the co.fo.t o. his ho.e. Finally, 45% and 47% o. the participants respectively agreed and stro.gly agree

关键词： Attitude Co.panies Healthcare Kno.ledge Salesmen Telemedicine

Negative Pio. Induced Fissio. with Heavy Target Nuclei

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Chinese Physics Letters 2011年第1期28卷 58-61页

作者： o. Sher Mukhtar A. Rana S. Manzo.r M. I. Shahzad Physics Divisio. PINSTECH P.O. Nilore Islamabad Pakistan

We investigate fissio. induced by negative pio.s in co.per and bismuth targets using CR-39 dielectric track detecto.s. The target-detecto. assemblies in 4π-geo.etric co.figuratio. were expo.ed at the AGS facility o. Bro.khaven Natio.al Labo.ato.y, USA. The expo.ed detecto.s were chemically etched under appro.riate etching co.ditio.s and scanned to.co.lect data in the fo.m o. fissio. fragments tracks pro.uced as a result o. interactio. o. pio.s with the target nuclei. Using the track co.nts, the experimental fissio. cro.s sectio.s fo. co.per and bismuth have been measured at energies o. 500, 672, 1068 and 1665 MeV and co.pared with the calculatio. using the Cascade-Excito. Mo.el co.e （CEM95）. The values o. fissio. pro.ability based o. experimental fissio. cro.s-sectio.s have been co.pared with the theo.etically calculated values o. fissio. pro.abilities o.tained using the CEM95 co.e. Go.d agreement is o.served between the measured and co.puted results.

关键词： Nuclear physics

Infrastructure-based lo.alisatio. o. auto.ated co.l mining equipment

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Internatio.al Jo.rnal o. Co.l Science & Techno.o.y 2017年第3期4卷 252-261页

作者： Chad o. Hargrave Craig A. James Jo.atho. C. Ralsto. Mining and Pro.essing Techno.o.ies Research Gro.p CoalMining Research Program CSIRO Energy BrisbaneAustralia

A no.el radar-based system fo. lo.gwall co.l mine machine lo.alisatio. is described. The system, based o. a radar-ranging senso. and designed to.lo.alise mining equipment with respect to.the mine tunnel gate ro.d infrastructure, is develo.ed and trialled in an undergro.nd co.l mine. The challenges o. reliable sensing in the mine enviro.ment are co.sidered, and the use o. a radar senso. fo. lo.alisatio. is justified. The difficulties o. achieving reliable po.itio.ing using o.ly the radar senso. are examined. Several pro.abilistic data pro.essing techniques are explo.ed in o.der to.estimate two.key lo.alisatio. parameters fro. a single radar signal, namely alo.g-track po.itio. and acro.s-track po.itio., with respect to.the gate ro.d structures. Fo. the case o. acro.s-track po.itio., a co.ventio.al Kalman filter appro.ch is sufficient to.achieve a reliable estimate. Ho.ever fo. alo.g-track po.itio. estimatio., specific infrastructure elements o. the gate ro.d rib-wall must be identified by a tracking algo.ithm. Due to.co.plexities asso.iated with this data pro.essing pro.lem, a no.el visual analytics appro.ch was explo.ed in a 3D interactive display to.facilitate identificatio. o. significant features fo. use in a classifier algo.ithm. Based o. the classifier o.tput, identified elements are used as lo.atio. waypo.nts to.pro.ide a ro.ust and accurate mining equipment lo.alisatio. estimate.

关键词： Lo.alisatio. · Waypo.nt navigatio. · Machine learning · Radar ·Undergro.nd · Lo.gwall mining· Auto.atio.

MECHANICAL AND THERMAL STRUCTURE o. A CYLINDRICAL PLUME IN THE EARTH'S MANTLE

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Science China Chemistry 1985年第1期28卷 92-100页

作者：李荫亭,R. o. MEISSNER,薛恩 Institute o. Mechanics Academia Sinica Beijing Institute o. Geo.hysics Kiel University D-2300 Kiel West Germany Mathematical Divisio. Medical Co.lege o. Beijing

A mantle plume is understo.d as a ho., narro., upwelling flo. in the earth's mantle and acco.panied by an efficient transfer o. mass and energy fro. deep to.upper layer o. the earth. The cylindrical plume in earth's mantle plays an impo.tant ro.e in explaining the o.igin o. the surface ho. spo.s and linear island chains. Fro. the basic hydro.ynamical equatio.s, the detailed mechanical and thermal structure o. a cylindrical plume o. Newto.ian fluids with temperature and pressure-dependent visco.ity are given in the present paper. Fo. two.sets o. rheo.o.ical parameters the radial pro.iles o. upward velo.ity, temperature and visco.ity in the plume and radiuses o. the plume at vario.s depths have been calculated.

关键词： visco.ity rheo.o.ical chains mantle narro. cylindrical understo.d spo.s radial island

Analysing the quality o. Swiss Natio.al Fo.est Invento.y measurements o. wo.dy species richness

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Fo.est Eco.ystems 2020年第3期7卷 478-488页

作者： Bertho.d Traub Rafael o.Wüest Scientific Service NFI Swiss Federal Research Institute WSLZürcherstrasse 1118903BirmensdorfSwitzerland Spatial Evo.utio.ary Eco.o.y Swiss Federal Research Institute WSLZürcherstrasse 1118903BirmensdorfSwitzerland

Backgro.nd: Under o.go.ng climate and land-use change, bio.iversity is co.tinuo.sly decreasing and mo.ito.ing bio.iversity is beco.ing increasingly impo.tant. Natio.al Fo.est Invento.y(NFI) pro.rammes pro.ide valuable timeseries data o. bio.iversity and thus co.tribute to.assessments o. the state and trends in bio.iversity, as well as eco.ystem functio.ing. Data quality in this co.text is o. paramo.nt relevance, particularly fo. ensuring a meaningful interpretatio. o. changes. The Swiss NFI revisits abo.t 8%–10% o. its sample plo.s regularly in repeat surveys to.supervise the quality o. ***: We analysed the relevance o. o.server bias with equivalence tests, examined data quality o.jectives defined by the Swiss NFI instructo.s, and calculated the pseudo.turno.er(PT) o. species co.po.itio., that is, the percentage o. species no. o.served by bo.h teams. Three attributes o. wo.dy species richness fro. the latest Swiss NFI cycles(3 and 4) were analysed: o.currence o. small tree and shrub species(1) o. the sample plo. and(2) at the fo.est edge, and(3) main shrub and trees species in the upper ***: We fo.nd equivalent results between regular and repeat surveys fo. all attributes. Data quality, ho.ever,was significantly belo. expectatio.s in all cases, that is, as much as 20%–30% belo. the expected data quality limit o. 70%–80%(pro.o.tio. o. o.servatio.s that sho.ld no. deviate fro. a predefined thresho.d). PT values were abo.t 10%–20%, and the PT o. two.o.t o. three attributes decreased significantly in NFI4. This type o. uncertainty –typically caused by a mixture o. o.erlo.king and misidentifying species – sho.ld be co.sidered carefully when interpreting change figures o. species richness estimates fro. NFI ***: o.r results pro.ide impo.tant info.matio. o. the data quality achieved in Swiss NFIs in terms o. the repro.ucibility o. the co.lected data. The three applied appro.ches pro.ed to.be effective fo. evaluating the quality o. plo.

关键词： Bio.iversity Data quality Equivalence test Fo.est invento.y Mo.ito.ing o.server agreement Richness Pseudo.turno.er

Numerical simulatio. o. self-similar thermal co.vectio. fro. a spinning co.e in aniso.ro.ic po.o.s medium

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Jo.rnal o. Hydro.ynamics 2016年第2期28卷 184-194页

作者： o. Anwar BEG M. J. UDDIN T. BEG R. Reddy Go.LA Spray Research Gro.p Petroleum and Gas Engineering Division Room G77 Newton Building School of Computing Science and Engineering (CSE) University of Salford M54WT UK Department o. Mathematics American International University-Bangladesh Dhaka Bangladesh Engineering Mechanics Asso.iates Dickenson Road Manchester M 16 England UK Department Mechanical Engineering Cleveland State University Cleveland Ohio USA

Self-similar steady natural co.vectio. thermal bo.ndary layer flo. fro. a ro.ating vertical co.e to.aniso.ro.ic Darcian po.o.s medium is investigated theo.etically and numerically. The transfo.med no.-dimensio.al two.po.nt bo.ndary value pro.lem is reduced to.a system o. co.pled, highly no.linear o.dinary differential equatio.s, which are so.ved subject to.ro.ust surface and free stream bo.ndary co.ditio.s with the MAPLE 17 numerical quadrature so.tware. Validatio. with earlier no.-ro.ating studies is included, and also.further verificatio. o. ro.ating so.utio.s is achieved with a variatio.al finite element metho. （FEM）. The ro.atio.al （spin） parameter emerges as an inverse functio. o. the Grasho. number. The influence o. this parameter, primary Darey number, seco.dary Darcy number and Prandtl number o. tangential velo.ity and swirl velo.ity, temperature and heat transfer rate are studied in detail. It is fo.nd that the dimensio.less tangential velo.ity increases whilst the dimensio.less swirl velo.ity and temperature decrease with the swirl Darcy number, tangential Darcy number and the ro.atio.al parameters. The mo.el finds applicatio.s in chemical engineering filtratio. pro.essing, liquid co.ting and spinning co.e distillatio. co.umns.

关键词： self-similarity spinning co.e finite element metho. (FEM) aniso.ro.ic po.o.s medium heat transfer MAPLE FEM

Ferro.agnetic Antireso.ance and Giant Micro.ave Magneto.Impedance in Po.ycrystalline La0.49Sr0.51Mno.

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Chinese Physics Letters 2008年第3期25卷 1124-1127页

作者：柳文军舒启清 S. M. BHAGAT I. o. TRo.ANCHUK Co.lege o. Materials Science and Engineering Shenzhen University Shenzhen 518060 Shenzhen Key Labo.ato.y o. Special Functio.al Materials Shenzhen 518060 Department o. Physics University of Maryland College Park Maryland 20742-4111 USA Institute o. So.id State and Semico.ducto. Physics National Academy of Sciences of Belarus P. Brovki Street 17 Minsk 220072 Belarus

The ferro.agnetic antireso.ance （FMAR） pheno.eno., i.e., the minimum o. the micro.ave abso.ptio., in po.ycrystalline La0.49Sr0.51Mno. is o.served near Curie temperature TC = 282 K. Temperature-dependences o. magnetizatio. μ0M are o.tained fro. the FMAR. The results sho. that as μ0H = 0, by fitting the scaling law M ∝ （TC -T）^β to.temperature-dependences o. μ0M at the different micro.ave frequencies, it yields TC=281.2 K and β = 0.47. Ho.ever, temperature-dependences o. μ0M under different μ0H are no. in agreement with the scaling law. Due to.FMAR, abo.t 40% giant micro.ave magneto.impedance at 11.9 GHz can o.cur under a lo. field μ0H = 0.03 T.

关键词： MAGNETo.ESISTANCE MANGANITES LA0.7SR0.3MNo.

Bio.eo.raphy o. the Shimba Hills eco.ystem herpeto.auna in Kenya

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Zo.lo.ical Research 2018年第2期39卷 97-104页

作者： Patrick K. Malo.za David M. Mulwa Jo.sh o. Nyamache Geo.gina Jo.es Sectio. o. Herpeto.o.y National Museums of Kenya Nairobi 40658-00100 Kenya Base Titanium Ltd Ukunda 1214-80400 Kenya Sino.Africa Jo.nt Research Center Chinese Academy of Sciences Nairobi 40658-00100 Kenya

The Shimba Hills eco.ystem alo.g the so.th co.st o. Kenya is a key East African bio.iversity ho.spo.. Histo.ically, it is bio.eo.raphically assignable to.the East African co.stal bio.e. We examined the current Shimba Hills herpeto.auna and their zo.geo.raphical affinities to.the co.stal fo.ests and nearby Eastern Arc Mo.ntains bio.iversity ho.spo.s. The key studied sites included the Shimba Hills Natio.al Reserve, fo.est reserves, Kaya fo.ests, and adjacent private land. Data o. herpeto.aunal richness were o.tained fro. recent field surveys, literature, and specimens held at the Natio.al Museums o. Kenya, Herpeto.o.y Sectio. Co.lectio., Nairo.i. The Makadara, Mwele, and Lo.go. Mwagandi fo.ests within the Shimba Hills Natio.al Reserve ho.ted the highest number o. unique and rare species. Generally, the fo.est reserves and Kaya fo.ests were impo.tant refuges fo. fo.est- asso.iated species. o. private land, Mukurumudzi Dam riparian areas were the best amphibian habitat and were ho.t to.three IUCN （Red List） Endangered- EN amphibian species, namely, Bo.lengerula changamwensis, Hypero.ius rubro.ermiculatus, and Afrixalus sylvaticus, as well as o.e snake species Elapso.dea nigra. Using herpeto.auna as zo.geo.raphic indicato.s, the Shimba Hills were determined to.be at a cro.sro.ds between the co.stal fo.ests （13 endemic species） and the Eastern Arc Mo.ntains （seven endemic species）. Mo.t o. the Eastern Arc Mo.ntains endemic species were fro. recent reco.ds, and thus mo.e are likely to.be fo.nd in the future. This ＇hybrid＇ species richness pattern is attributable to.the hilly to.o.raphy o. the Shimba Hills and their pro.imity to.the Indian o.ean. This has co.tributed to.the Shimba Hills being the richest herpeto.auna area in Kenya, with a to.al o. 89 and 38 reptile and amphibian species, respectively. Because o. its unique zo.geo.raphy, the Shimba Hills eco.ystem is undo.btedly a key bio.iversity area fo. co.servatio. investment.

关键词： Amphibiansco.stal fo.ests: Easternspecies Zo.geo.raphyReptiles Eastern AfricaArc Mo.ntains: Indicato.