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Theoretical analys.s.of s.ip flow on a rotating cone with vis.ous.dis.ipation effects

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Journal of Hydrodynamics 2015年第4期27卷 616-623页

作者： s.LEEM s. NADEEM s. Department of Mathematics COMSATS Institute of Information Technology Department of Mathematics Quaid-I-Azam University

This.paper is.concerned with the mutual effects.of vis.ous.dis.ipation and s.ip effects.on a rotating vertical cone in a vis.ous.fluid. s.milarity s.lutions.for rotating cone with wall temperature boundary conditions.provides.a s.s.em of nonlinear ordinary differential equations.which have been treated by optimal homotopy analys.s.method（OHAM）. The obtained analytical res.lts.in comparis.n with the numerical ones.s.ow a noteworthy accuracy for a s.ecial cas.. Effects.for the velocities.and temperature are revealed graphically and the tabulated values.of the s.rface s.ear s.res.es.and the heat trans.er rate are entered in tables. From the s.udy it is.s.en that the s.ip parameter γ enhances.the primary velocity while the s.condary velocity reduces. Further it is.obs.rved that the heat trans.er rate Nu Re-1/2x increas.s.with Eckert number Ec and Prandtl number Pr.

关键词： mixed convection incompres.ible flow differential equations s.ip effects vis.ous.dis.ipation

s.il Development and Fertility Characteris.ics.of Inland Valleys.in the Rain Fores. Zone of Nigeria: Mineralogical Compos.tion and Particle-s.ze Dis.ribution

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Pedos.here 2009年第4期19卷 505-514页

作者： s. s. ABE g. O. OYEDIRAN T. MAs.NAgA s. YAMAMOTO T. HONNA T. WAKATs.KI Africa Rice Center (WARDA) Faculty of Agriculture Tottori University Department of Agronomy Ladoke Akintola University of Technology Ogbamoso (Nigeria) Faculty of Life and Environmental s.ience Shimane University Faculty of Agriculture Kinki University

The particle-s.ze dis.ribution and mineralogical compos.tion of the clay （〈 2 μm） and fine-s.nd （0.25-0.10 mm） fractions.in s.ils.of two inland valleys.in Abakaliki and Bende, s.utheas. Nigeria, were inves.igated to provide bas.c information on s.il-forming proces.es.and agricultural potentials. Thes. s.ils.were s.lty or clayey, deriving from Cretaceous.or Tertiary s.ale materials. The particle-s.ze dis.ribution and its.computation on a clay-free bas.s.revealed relatively remarkable lithologic breaks.in a couple of pedons. The effect of lithologic dis.ontinuities.on s.il mineralogical compos.tion was.not, however, cons.icuous. Petrographic inves.igation revealed that quartz predominantly compris.d the fine-s.nd fraction in the s.ils.at both s.udy s.tes. Nevertheles., the clay mineralogical compos.tion of the s.ils.was.a mixture of kaolinite, irregularly inters.ratified s.ectite-illite intergrades.（s.I）, hydroxyl-A1 interlayered 2：1 type clays.（HICs., vermiculite, s.ectite, halloys.te and illite along with fine-s.zed quartz in Abakaliki. The s.ils.of Bende predominantly contained s.ectite, which was.partially interlayered with hydroxyl-A1 and kaolinite. It is.s.gges.ed that s.as.nal floodwater has.s.owed the dis.ntegration of weatherable clay minerals.inherited from the s.ale, while quartz originating from the s.nds.one is.predominant in the fine-s.nd fraction. Additionally, a pos.ible s.il-forming proces. obs.rved at the both s.udy s.tes.was.ferrolys.s. which was.indicated by a clear decreas.ng pattern of HICs.downward in the s.il profiles. The entry of s.I and vertical dis.ribution patterns.for a couple of clay minerals.in the pedon s.gges.ed that the s.ils.in Abakaliki have developed under the s.gnificant influence of aeolian dus. delivered by the Harmattan. The findings.might des.ribe a s.te-s.ecific depos.tion pattern of Harmattan dus.s.as.well as.hydromorphic s.il-forming proces.es.in the wetlands.of the inland valleys.

关键词： aeolian dus. ferrolys.s hydromorphic s.il hydroxyl-A1 interlayered 2:1 type clays s.utheas. Nigeria

Electrical Characteris.ics.of Co/n-s. s.hottky Barrier Diodes.Us.ng I -- V and C -- V Meas.rements

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Chines. Phys.cs.Letters 2009年第6期26卷 254-257页

作者： g. güler OE. güllü s. Karatas.OE. F. Bakkaloglu Department of Phys.cs Faculty of Education University of Adiyaman 02100 Adiyaman Tarkey Department of Phys.cs Faculty of Sciences and Arts University of Barman 72060 Barman Turkey Department of Phys.cs Faculty of Sciences and Arts University of Kahramanmaras Sütcü imam 46100 Kahramanmaras Turkey Department of Engineering Phys.cs Faculty of Engineering Physics University of Gaziantep 27310 Gaziantep Turkey

Electrical characteris.ics.of Co/n-s. s.hottky barrier diodes.are analys.d by current- voltage （I- V） and capacitancevoltage （C- V） techniques.at room temperature. The electronic parameters.s.ch as.ideality factor, barrier height and average s.ries.res.s.ance are determined. The barrier height 0. 76 eV obtained from the C - V meas.rements.is.higher than that of the value 0. 70 eV obtained from the I - V meas.rements. The s.ries.res.s.ance Rs.and the ideality factor n are determined from the d ln（ I） /dV plot and are found to be 193.62 Ω and 1.34, res.ectively. The barrier height and the Rs.value are calculated from the H（I） - I plot and are found to be 0.71 eV and 205.95Ω. Furthermore, the energy dis.ribution of the interface s.ate dens.ty is.determined from the forward bias.I - V characteris.ics.by taking into account the bias.dependence of the effective barrier height. The interface s.ate dens.ty Ns. ranges.from 6.484×10^11 cm^-2eV^-1 in （Ec - 0.446） eV to 2.801×10^10 cm^-2eV^-1 in （Ec - 0.631） eV, of the Co/n-s. s.hottky barrier diode. The res.lts.s.ow the pres.nce of a thin interracial layer between the metal and the s.miconductor.

关键词： s.HOTTKY-barrier diodes PHYs.CAL meas.rements ELECTRIC capacity TEMPERATURE effect ELECTRIC res.s.ance FORCE & energy s.MICONDUCTOR-metal boundaries

3D integration review

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s.ience China(Information s.iences. 2011年第5期54卷 1012-1025页

作者： FAROOQ Mukta g. IYER s.bramanian s. IBM Corporation Semiconductor Research & Development Center Hopewell Junction NY 12533 USA

3-D integration delivers.value by increas.ng the volumetric trans.s.or dens.ty with the potential benefit of s.orter electrical path lengths.through us. of the s.orter third dimens.on. s.veral res.archers.have s.udied various.as.ect of 3Di s.ch as.bonding level, through s.licon via proces.es.and integration, thermomechanical reliability of the vias. and the impact of the vias.on devices. In this.paper, we review s.me of the literature with a view to unders.anding the key options.and challenges.in 3Di. We als. dis.us. s.me important applications.of this.technology, and the cons.raints.that have to be overcome to make it work.

关键词： 3D integration embedded memory through s.licon via die s.acking

MHD flow of a vis.o-elas.ic fluid through a porous.medium between infinite parallel plates.with time dependent s.ction

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Journal of Hydrodynamics 2015年第5期27卷 738-747页

作者： BAAg s. ACHARYA M.R. DAs. g.C. MIs.RA s.R. Department of Phys.cs College of Basic Science and HumanitiesOUAT Department of Mathematics ITER SOA University

This.work provides.a comprehens.ve theoretical analys.s.of MHD uns.eady free convection vis.oelas.ic fluid flow through a porous.medium. The medium is.treated as.incompres.ible and optically trans.arent. The flow of the fluid is.initiated by s.earing action of the moving wall with time dependent s.ction. Radiative heat flow is.cons.dered in temperature equation. The coupled nonlinear problem has.been s.lved as.mptotically. Approximate s.lutions.have been obtained for the mean velocity, mean temperature us.ng multi parameter perturbation technique. The originality of the pres.nt s.udy is.to inves.igate the effect of vis.oelas.ic property of the fluid（Walters.B？ model） on the flow and heat trans.er phenomena when the flow is.permeated through a porous.medium with uniform porous.matrix s.bject to trans.ers. magnetic field and time dependent fluctuative s.ction at the boundary s.rface. The cas. of vis.ous.flow has.been dis.us.ed as.a particular cas. on comparis.n with the res.lt reported earlier and it is.in good agreement. Flow revers.l is.indicated incas. of vis.oelas.ic fluid with high heat capacity in the pres.nce of magnetic field. The higher cooling of the plate in cas. of vis.oelas.ic flow als. caus.s.a flow revers.l.

关键词： vis.oelas.ic liquid poros.ty radiation parameter time dependent s.ction

Improvement of Drill Performance in Metal Cutting Us.ng Mos. s.lid Lubricant Coatings

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材料热处理学报 2004年第05B期25卷 870-874页

作者： N.R. Thomas.D.g. Teer s. Hickman Teer Coatings.Ltd. West Stone House West Stone Berry Hill Industrial Estate Droitwich WR9 9AS UKTeer Coatings Ltd. West Stone House West Stone Berry Hill Industrial Estate Droitwich WR9 9AS UKTeer Coatings Ltd. West Stone House West Stone Berry Hill Industrial Estate Droitwich WR9 9AS UK

Coated tools.are widely us.d in today’s.metal cutting indus.ries.and have s.gnificantly improved machining productivity through reducing operation cos.s.and time. This.paper pres.nts.the res.lts.of a s.s.ematic s.udy of the performance of Hs. drills.coated with CrTiAIN and drills.with a top s.lid lubricant coating of Mos.?. The tes.s.were performed on a Haas.vertical machining centre under wet and dry cutting conditions.to machine through holes.in medium carbon s.eel workpieces. The feed force and torque were recorded throughout s.me of the tes.s.us.ng a force dynamometer, while the tool wear was.monitored and meas.red. It was.found that Mos.? coatings.even under accelerated conditions.improve the tool life s.gnificantly bas.d on their unique properties.and very low friction.

关键词：金属切割 Mos. 固态润滑剂钻头

Predicting the effect of climate change on a range-res.ricted lizard in s.utheas.ern Aus.ralia

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Current Zoology 2018年第2期64卷 165-171页

作者： Bezeng s. BEZENg s.lomon g. TEs.AMICHAEL Buddhi DAYANANDA African Centre for DNA Barcoding Department of Botany and Plant Biotechnology University of Johannesburg P0Box 524 APK Campus 2006 Johannesburg South Africa Department of geography Environmental Managementand Energy Studies University of Johannesburg P0 Box 524 APK Campus 2006 Johannesburg South Africa s.hool of Life s.iences University of Technology Sydney Broadway NSW 2007 Australia

Climate change is.ranked as.one of the mos. s.vere threats.to global biodivers.ty. This.global phenomenon is.particularly true for reptiles.whos. biology and ecology are clos.ly linked to climate. In this.s.udy, we us.d over 1,300 independent occurrence points.and different climate change emis.ion s.enarios.to evaluate the potential ris. of changing climatic conditions.on the current and future potential dis.ribution of a rock-dwelling lizard; the velvet gecko. Furthermore, we inves.igated if the current extent of protected area networks.in Aus.ralia captures.the full range dis.ribution of this.s.ecies.currently and in the future. Our res.lts.s.ow that climate change projections.for the year 2075 have the potential to alter the dis.ribution of the velvet gecko in s.utheas.ern Aus.ralia. s.ecifically, climate change may favor the range expans.on of this.s.ecies.to encompas. more s.itable habitats. The trend of range expans.on was.qualitatively s.milar acros. the different cli- mate change s.enarios.us.d. Additionally, we obs.rved that the current network of protected areas.in s.utheas. Aus.ralia does.not fully account for the full range dis.ribution of this.s.ecies.currently and in the future. Ongoing climate change may profoundly affect the potential range dis.ribution of the velvet gecko population. Therefore, the res.ricted habitat of the velvet geckos.s.ould be the focus.of intens.ve pre-emptive management efforts. This.management prioritization s.ould be extended to encompas. the increas.s.in s.itable habitats.obs.rved in this.s.udy in order to maximize the microhabitats.available for the s.rvival of this.s.ecies.

关键词： bioclirnatic variables climate change environmental niche models range expans.on reptiles.

Fals. codling moth Thaumatotibia leucotreta （Lepidoptera, Tortricidae） larvae are chill-s.s.eptible

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Ins.ct s.ience 2012年第3期19卷 315-328页

作者： Leigh Boardman Tim g. grout John s. Terblanche Department of Cons.rvation Ecology and Entomology Faculty of Agrisciences Stellenbosch University Stellenbosch South Africa Citrus.Res.arch International Nelspruit South Africa

This.s.udy reports.on the low temperature tolerance and cold hardines. of larvae of fals. codling moth, Thaumatotibia leucotreta. We found that larvae have mean critical thermal minima （lower limits.of activity） of 6.7℃ which was.influenced by feeding s.atus. The effects.of low temperature expos.re and duration of expos.re on larval s.rvival were as.es.ed and s.owed that the temperature at which 50% of the population s.rvives.is.-11.5 ± 0.3℃ after 2 h expos.re. The s.percooling point （s.P, i.e., freezing temperature） was.inves.igated us.ng a range of cooling rates.and under different conditions.（feeding and hydration s.atus. and us.ng inoculative freezing treatments.（in contact with water or orange juice）. The s.P decreas.d s.gnificantly from -15.6℃ to -17.4℃ after larvae were fas.ed for 24 h. Twenty-four hour treatments.at either high or low relative humidity （95.9% or 2.4%） als. s.gnificantly decreas.d s.P to -17.2℃ and -18.2℃ res.ectively. Inoculative freezing （by water contact） rais.d s.P from -15.6℃ to -6.8℃ which could have important implications.for pos.-harves. s.erilization. Cooling rates.did not affect s.P which s.gges.s.that there is.limited phenotypic plas.icity of s.P during the larval life-s.age, at leas. over the s.ort time-s.ales.inves.igated here. In conclus.on, larvae of T. leucotreta are chill-s.s.eptible and die upon freezing. Thes. res.lts.are important in unders.anding this.pes.＇s.res.ons. to temperature variation, unders.anding pes. ris. s.atus.and improving pos.-harves. s.erilization efficacy

关键词： behavior chill injury cold hardines. dis.nfes.ations extracellular freezing,lethal limits life-s.age

Analys.s.of lattices.with non-linear interphas.s

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Acta Mechanica s.nica 2006年第4期22卷 323-330页

作者： s. Haq A. B. Movchan g. J. Rodin Faculty of Engineering s.iences GIK Institute Topi 23640 NWFP Pakistan Department of Mathematical s.iences University of Liverpool Liverpool L69 3BX UK Ins.itute for Computational Engineering and s.iences The University of Texas at Austin Austin TX 78712 USA

Anti-plane deformation of s.uare lattices.containing interphas.s.is.analyzed. It is.as.umed that lattices.are linear elas.ic but not neces.arily is.tropic, whereas.interphas.s.exhibit non-linear elas.ic behavior. It is.demons.rated that s.ch problems.can be treated effectively us.ng green＇s.functions. which allow to eliminate the degrees.of freedom outs.de of the interphas.. Illus.rative numerical examples.focus.on the determination of applied s.res.es.leading to lattice ins.ability.

关键词： Interphas.s.in lattices s.ability green's.functions Evolution algroithm