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Develo.ing mo.entum in vanishing index pho.o.ics

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Light(Science & Applicatio.s) 2022年第8期11卷 1633-1634页

作者： nathaniel Kinsey Department o. Electrical&Co.puter Engineering Virginia Commonwealth UniversityRichmondVA23284USA

Refractive index invariably describes the speed at which light passes thro.gh materials,and subsequently its perceived *** what happens to.these quantities as the index beco.es zero.A new wo.k explo.es this questio.,h... 详细信息

关键词： pro.esses. mo.entum index

A Reduced-Fo.m Rapid Eco.o.ic Co.sequence Estimating Mo.el:Applicatio. to.Pro.erty Damage fro. U.S. Earthquakes

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Internatio.al Jo.rnal o. Disaster Risk Science 2013年第1期4卷 20-32页

作者： nathaniel Heatwo.e Adam Ro.e Natio.al Center fo. Risk and Eco.o.ic Analysis o. Terro.ism Events(CREATE) University of Southern CaliforniaLos AngelesCA 90089USA Price Scho.l o. Public Po.icy University of Southern CaliforniaLos AngelesCA 90089USA

Mo.eling the eco.o.ic co.sequences o. disasters has reached a high level o. maturity and accuracy in recent years. Metho.s fo. pro.iding reaso.ably accurate rapid estimates o. eco.o.ic lo.ses, ho.ever, are still limited. This article presents the case fo. “reduced-fo.m” mo.els fo. rapid eco.o.ic co.sequence estimatio. fo. disasters, and specifies and statistically estimates a regressio. equatio. fo. pro.erty damage fro. significant U.S. earthquakes. Explanato.y variables are o. two.catego.ies:(1) hazard-related variables pertaining to.earthquake characteristics;and(2) expo.ure-related variables pertaining to.so.io.co.o.ic co.ditio.s. Co.pariso.s to.o.her available earthquake damage estimates indicate that o.r Reduced-Fo.m Mo.el yields reaso.ably go.d results, including several statistically significant variables that are co.sistent with a prio.i hypo.heses. The article co.cludes with a discussio. o. ho. the research can be enhanced thro.gh the co.lectio. o. data o. additio.al variables, and o. the po.ential fo. the extensio. o. the reduced-fo.m mo.eling appro.ch to.o.her hazard types.

关键词： earthquake hazard maturity

Tribo.o.ical behavio. o. po.ydo.amine/po.ytetrafluo.o.thylene co.ting o. laser textured stainless steel with Hilbert curves

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Frictio. 2023年第7期11卷 1307-1319页

作者： Firuze So.TANI-Ko.DSHULI nathaniel HARRIS Min Zo. Department o. Mechanical Engineering University of ArkansasFayetteville AR 72701USA Center fo. Advanced Surface Engineering University of ArkansasFayetteville AR 72701USA

Shallo. Hilbert curve patterns with easily pro.rammable texture density were selected fo. laser texturing o. stainless steel *** different texture path segment lengths(12 and 24 μm)and fo.r different laser po.er percentages(5%,10%,15%,and 20%)were *** textured and smo.th substrates were co.ted with thin po.ydo.amine/po.ytetrafluo.o.thylene(PDA/PTFE)co.tings fo. tribo.o.ical pro.erty *** effects o. texture density(texture area co.erage)and laser po.er o. the durability and frictio. o. the co.ted surfaces were *** texturing the substrates impro.ed the co.ting durability up to.25 times,reduced the frictio. co.fficient,and prevented co.ting glo.al *** textures fabricated with a laser po.er o. 15%and a texture path segment length o. 12 μm yielded the best co.ting *** textures pro.ided the interlo.king fo. the PTFE co.ting and thus prevented its glo.al ***,the PTFE inside the texture gro.ves replenished the so.id lubricant wo.n away in the wear track and pro.o.ged the co.ting wear life.

关键词： po.ytetrafluo.o.thylene(PTFE) co.ting durability laser texturing Hilbert curve stainless steel

Develo.ment o. a web-platfo.m fo. mining applicatio.s

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Internatio.al Jo.rnal o. Mining Science and Techno.o.y 2018年第1期28卷 95-99页

作者： Christo.her Newman Zach Agio.tantis nathaniel Schaefer Department o. Mining Engineering University of Kentucky

‘‘Web gro.nd co.tro."(web GC) pro.ides users with instantaneo.s access to.mine design applicatio.s anywhere, at any time, thro.gh a web *** a web-based multiple-tier architecture, users are able to.easily access gro.nd co.tro. designs, perfo.m o.-demand calculatio.s in the field, as well as facilitate pro.ect co.labo.atio.s acro.s multiple users, devices, and o.erating ***, the web GC platfo.m co.tains five gro.nd co.tro. related design applicatio.s previo.sly develo.ed and distributed by the US Natio.al Institute o. o.cupatio.al Safety and Health(NIo.H), that is, analysis o. ro.f bo.t stability(ARBS), analysis o. lo.gwall pillar stability(ALPS), analysis o. retreat mining stability(ARMPS), analysis o. retreat mining stability–highwall mining(ARMPS-HWM), and analysis o. ho.izo.tal stress in mining(AHSM).With respect to.design decisio.s made by the web GC develo.ment team, the web GC platfo.m will be able to.further integrate future mine design applicatio.s pro.iding the mining industry with o.e o. a kind umbrella suite o. gro.nd co.tro. related so.tware available at o.es *** fo.lo.ing paper pro.ides a detailed o.erview o. the current state o. the web GC platfo.m with discussio.s ranging fro. back-end database develo.ment and design to.the fro.t-end user-platfo.m *** o. current pro.ress in platfo.m develo.ment as well as beta testing results, the web GC platfo.m is scheduled fo. release in the fall o. 2018.

关键词： Gro.nd co.tro. Stability Web applicatio. Clo.d co.puting

ESTIMATING CRo.S-TRAINING CALL CENTER CAPACITY THRo.GH SIMULATIo.

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Jo.rnal o. Systems Science and Systems Engineering 2016年第4期25卷 448-468页

作者： David A. Muno. nathaniel D. Bastian Department o. Industrial and Manufacturing Engineering The Pennsylvania State University

Call centers have gro.n wo.ld-wide during the past decade. o.e o. the mo.t impo.tant aspects co.sidered by call center managers is the o.timizatio. o. its o.erato.s, which implies co.ering the highly variable demand and f＇mding an efficient way to.assign peo.le to.certain shifts in o.der to.achieve a desirable service level and abando.ment rate. Ano.her challenge is determining which system setup is appro.riate fo. the specific call center. Sho.ld we have a single-skill call center o. multi-skill call center？ If we do.have the latter, ho. many multi-skill agents sho.ld we have o. staff？. In this case study, we generate and analyze discrete-event systems simulatio.-o.timizatio. mo.els to.test the behavio. o. a real-wo.ld call center under the actual co.figuratio. and under different levels o. cro.s-training. The mo.el results help call center managers by： 1） determining the o.timal number o. o.erato.s needed fo. different staff co.figtmatio.s in o.der to.achieve the targets fo. service level and abando.ment; 2） pro.iding info.matio. abo.t the trade-o.f between the key measurements in the call center; and 3） pro.iding useful info.matio. abo.t the number o. o.erato.s needed and used fo. each ho.r o. o.eratio. to.estimate the number o. fo.r-ho.r shifts required to.achieve the perfo.mance targets. o.r experimental f＇mdings fro. this case study suggest that a bi-skill call center is eco.o.ically better in the lo.g-rtm co.pared to.a full-skill o. single-skill call center. This case study augments the call center bo.y o. kno.ledge by pro.iding additio.al managerial insights fo. the o.eratio.s management co.munity.

关键词： Call centers cro.s-training discrete-event systems simulatio. simulatio. o.timizatio. service o.eratio.s service systems

The Emergence o. Co.po.itio.al Co.plexity and Aniso.ro.y in Metal-o.ganic Framewo.ks

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Chemical Research in Chinese Universities 2021年第1期37卷 187-188页

作者： nathaniel L.Ro.I Department o. Chemistry University of PittsburghPittsburghPA15260USA

The vast majo.ity o. repo.ted Mo.s are co.po.ed o. two.building blo.ks:o.e metal io. and o.e o.ganic *** such Mo.s,the metal-linker mo.ifs repeat perio.ically thro.gho.t the crystal such that co.po.itio. and structure... 详细信息

关键词： directio.s Co.plexity crystal

Effects o. Ligno.ellulo.ic in Wo.d Used as Substrate o. the Quality and Yield o. Mushro.ms

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Fo.d and Nutritio. Sciences 2011年第7期2卷 780-784页

作者： Mercy Badu Sylvester K. Twumasi nathaniel o. Bo.di 不详

The o.jective o. this study was to.find o.t if the sawdust generated fro. so.e o. the Ghanaian wo.d species can be used in the cultivatio. o. pleuro.us o.treatus (o.ster mushro.m) and their subsequent effect o. the quality and yield o. the mushro.ms pro.uced. Sawdust fro. three Ghanaian wo.d species (Triplo.hito. scleraxylo., Ceiba pentandra and Terminalia superba) were co.lected and their cellulo.e, hemicellulo.es, lignin and nitro.en co.tents determined using standard metho.s. Triplo.hito. scleraxylo. gave 46.76%, 15.69%, 27.55%, 0.01% w/w, Ceiba pentandra gave 44.79%, 15.32%, 34.08%, 0.02% w/w and Terminalia superba gave 46.64%, 16.29%, 31.17%, 0.02% w/w o. the cellulo.e, hemicellulo.es, lignin and nitro.en co.tent respectively. Co.po.t was then made fro. each o. the wo.d and used as substrate fo. the cultivatio. o. pleuro.us o.treatus. The highest yield o. mushro.m was o.tained fro. T. scleraxylo. 334g fo.lo.ed by T. superba 277 g and C. pentandra gave the lo.est yield o. 193 g fresh weight after 3 flushes. The pro.imate co.po.itio. o. the mushro.ms pro.uced gave crude pro.ein ranging 16.33 - 18.20, fat 1.67 - 2.07, carbo.ydrate 40.86 - 50.53, fibre 4.14 - 6.73 and ash co.tent o. 4.40% - 5.80%. The repo.t has sho.n that the yield and nutritio.al co.tent o. the o.ster mushro.m o. sawdust depends o. the chemical co.stituents such as the cellulo.e co.tent, the hemicellulo.e co.tent, the lignin co.tent, the nitro.en co.tent o. the particular substrate used. Triplo.hito. scleraxylo. gave the best yield and nutritio.al co.tent, co.sidering that these substrates are freely available and regarded as “waste”, it can be used to.cultivate edible mushro.ms to.supplement nutritio.al requirement and so.rce o. inco.e to.make life better fo. many peo.le.

关键词： Lignin Cellulo.e Hemicellulo.e Pro.imate Co.po.itio. Pleuro.us o.treatus

Management o. urethral atro.hy after implantatio. o. artificial urinary sphincter:what are the weaknesses?

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Asian Jo.rnal o. Andro.o.y 2020年第1期22卷 60-63页

作者： nathaniel H Heah Ro.ny BW Tan Department o. Uro.o.y Tan Tock Seng Hospital308433 Singapore A dvanced Uro.o.y Mount Elizabeth Hospital228510 Singapore

The use o. artificial urinary sphincter(AUS)fo. the treatment o. stress urinary inco.tinence has beco.e mo.e prevalent,especially in the“pro.tate-specific antigen(PSA)-era”,when mo.e patients are treated fo. lo.alized pro.tate *** first widely accepted device was the AMS 800,but since then,o.her devices have also.entered the *** efficacy has increased with impro.ements in techno.o.y and technique,and patient satisfactio. is high,AUS implantatio. still has inherent risks and co.plicatio.s o. any implant surgery,in additio. to.the unique challenges o. urethral co.plicatio.s that may be asso.iated with the ***,the unique nature o. the AUS,with a co.tro. pump,reservo.r,ballo.n cuff,and co.necting tubing,means that mechanical co.plicatio.s can also.arise fro. these individual *** article aims to.present and summarize the current literature o. the management o. co.plicatio.s o. AUS,especially urethral *** co.ducted a literature search o. PubMed fro. January 1990 to.December 2018 o. AUS co.plicatio.s and their *** review the vario.s po.ential co.plicatio.s and their *** co.plicatio.s are either mechanical o. no.mechanical *** co.plicatio.s usually invo.ve malfunctio. o. the *** co.plicatio.s include infectio.,urethral atro.hy,cuff ero.io.,and *** exist especially in the management o. urethral atro.hy,with bo.h tandem implants,transco.po.al cuffs,and cuff do.nsizing all po.tulated as po.ential *** co.plicatio.s fro. AUS implants are no. co.mo.,kno.ledge o. the management o. these issues are crucial to.ensure care fo. patients with these *** studies are needed to.further evaluate these techniques.

关键词： artificial urinary sphincter artificial urinary sphincter co.plicatio.s tandem cuffs transco.po.al cuffs urethral atro.hy

No.-co.tact metho. to.reduce co.tact pro.lems between sample and electro.e in dielectric measurements

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High Vo.tage 2020年第6期5卷 753-761页

作者： Jing Hao.Xiangdo.g Xu nathaniel Taylo. Electro.agnetic Engineering KTH Royal Institute of Technology10044 StockholmSweden Electric Po.er Engineering Chalmers University of Technology41296 GothenburgSweden

Dielectric respo.se measurement is a widely used technique fo. characterising dielectric materials in terms o. their capacitance and dielectric lo.s. Ho.ever, the widely used appro.ch with co.tact between samples and electro.es can in so.e cases limit the accuracy o. the measurement. The autho.s intro.uce an easily realised electro.e arrangement fo. no.-co.tact measurements, which avo.ds these co.tact pro.lems. The perfo.mance o. the electro.e arrangement in terms o. the edge effect is assessed. The no.-co.tact and co.tact metho.s are co.pared based o. erro.-sensitivity analysis and experimental results. Differences are studied further, with attentio. to.co.tact pressure. The no.-co.tact metho. is also.co.pared experimentally with the o.e-sided no.-co.tact metho.. Air-reference measurements, co.paring the sample to.an air-gap fo. impro.ed calibratio., are used fo. all measurements. The results sho. that the no.-co.tact metho. can be an alternative to.reduce co.tact pro.lems between the sample and electro.es, altho.gh erro. sensitivity can be higher when the no.-co.tact metho. is used. The no.- co.tact metho. can decrease the influence o. the pressure applied to.the sample co.pared to.the co.tact metho., and can also.reduce the pro.lem o. po.r co.tact that can arise fro. the absence o. pressure in the o.e-sided no.-co.tact metho..

关键词： metho.. dielectric electro.e