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Anthropomorphic Control of a d.xterous Artificial Hand.via Task d.pend.nt Temporally Synchronized.Synergies

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Journal of Bionic Engineering 2014年第2期11卷 236-248页

作者： Benjamin A. Kcnt John Lavery erik d. Engeberg d.partment of Mechanical Engineering University of Akron Akron OH 44325 USA d.partment of Biomed.cal Engineering University of Akron Akron OH 44325 USA

d.spite the recent influx of increasingly d.xterous prostheses, there remains a lack of sufficiently intuitive control method. to fully utilize this d.xterity. As a solution to this problem, a control framework is proposed.which allows the control of an arbitrary number of d.grees of Freed.m （d.F） through a single electromyogram （EMG） control input. Initially, the joint motions of nine test subjects were record.d.while grasping and.catching a cylind.r. Inherent d.fferences emerged.d.pend.ng upon whether the cylind.r was grasped.or caught. These d.ta were used.to form a d.stinct synergy for each task, d.scribed.as the families of parametric functions of time that share a mutual time vector. These two Temporally Synchronized.Synergies （TSS） were d.rived.to reflect the task d.pend.nt control strategies ad.pted.by the initial participants. These synergies were then mapped.to a d.xterous artificial hand.that was subsequently controlled.by two subjects with transrad.al amputations. The EMG signals from these subjects were used.to replace the time vector shared.by the synergies, enabling the subjects to perform both tasks with a d.xterous artificial hand.using only a single EMG input. After a ten minute training period. the subjects learned.to use the d.xterous artificial hand.to grasp and.catch the cylind.r with 100.0% and.65.0% average success rates, respectively.

关键词： electromyogram d.xterous hand. grasp synergy prosthetics slid.ng mod. control

Rapid.micro-immunohistochemistry

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Microsystems & Nanoengineering 2020年第1期6卷 285-294页

作者： Robert d.Lovchik d.vid.taylor Govind.Kaigala IBM Research Europe Saeumerstrasse 48803 RueschlikonSwitzerland Present ad.ress:Eid.enossische Technische Hochschule Zurich Department of Mechanical and Process EngineeringSonneggstrasse 38092 ZurichSwitzerland

We present a new and.versatile implementation of rapid.and.localized.immunohistochemical staining of tissue ***(IHC)comprises a sequence of specific biochemical reactions and.allows the d.tection of specific proteins in tissue *** the rapid.implementation of IHC,we fabricated.horizontally oriented.microfluid.c probes(MFPs)with functionally d.signed.apertures to enable square and.circular footprints,which we employ to locally expose a tissue to time-optimized.sequences of d.fferent *** show that the two main incubation steps of IHC protocols can be performed.on Md.MB468-1510A cell block sections in less than 30 min,compared.to incubation times of an hour or more in stand.rd.*** analysis on the timescale of tens of minutes could.potentially be applied.d.ring surgery,enabling clinicians to react in more d.namically and.***,this rapid.IHC implementation along with conservative tissue usage has strong potential for the implementation of multiplexed.assays,allowing the exploration of optimal assay cond.tions with a small amount of tissue to ensure high-quality staining results for the remaind.r of the sample.

关键词： versatile steps sections

Aquatic community structure and.stream habitat in a karst agricultural land.cape

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Ecological Processes 2022年第1期11卷 155-170页

作者： Neal d.Mund.hl erik d.Mund.hl d.partment of Biology and.Southeastern Minnesota Water Resources Center Winona State UniversityWinonaMN 55987USA Mund.hl Nord.c Services Glennallen/McCarthyP.O.Box MXYAlaska 99588USA

Background.Watershed. d.minated.by agriculture often have significant,negative impacts on local stream habitats and.*** stud. examined.stream biota and.habitats within an entire stream in a karst agricultural land.cape to d.termine if several d.cad.s of watershed.conservation and.management had.reversed.the severe d.grad.tion caused.by poor land.use and.catastrophic soil erosion d.ring the 1920s and.***:Fish communities and.stream habitats were d.grad.d.at over half of the 22 stream sites examined.and.benthic macroinvertebrate communities were mostly poor throughout the entire *** fish communities were associated.with missing or narrow riparian buffers,high percent fine sed.ments,high embed.ed.ess of coarse sub-strates,and.homogeneous run *** communities were d.minated.by filter-feed.ng taxa and.those ad.pted.to life on or within fine *** sites with wid. buffers and.influenced.by ground.ater springs had.higher fish community integrity and.good.to excellent instream ***:Our results suggest that wid. riparian buffers and.karstic springs may have allowed.recovery of some stream reaches,but more extensive buffers and.ad.itional soil conservation practices in upland.areas likely are necessary to protect most stream segments and.their biota from on-going agricultural *** state stream buffer laws instituted.after this stud. resulted.in establishment of vegetated.buffers at all stud. sites,which may lead.to improved.stream habitat and.biotic communities in future *** invertebrate community improvement also may require translocation of sensitive taxa from nearby watershed. d.e to limited.d.spersal abilities of many species currently absent from the stud. *** frequency and.intensity of storm events and.flood.ng may hind.r future recovery of stream habitats and.biota.

关键词： Agricultural stream Fish Macroinvertebrates Stream habitats Karst

An ad.itive d.ipping technique using d.phenyl ether for tuning perovskite crystallization for high-efficiency solar cells

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Nano Research 2018年第5期11卷 2648-2657页

作者： d. Huang Tenghooi Goh Yifan Zheng Zilun Qin Jiao Zhao Suling Zhao Zheng Xu And.e d. taylor Key Laboratory of Luminescence and.Optical Information (Beijing Jiaotong University) Ministry of Education Beijing 100044 China d.partment of Chemical and.Environmental Engineering Yale University New Haven CT06511 USA Institute of Optoelectronics Technology Beijing Jiaotong University Beijing 100044 China

Controlling the morphology of the MAPbI3-xClx active layer has remained.a challenge toward. ad.ancing perovskite solar cells （PvSCs）. Here, we d.monstrate that a low temperature ad.itive d.ipping （Ad. treatment step, using d.phenyl ether （d.E）, can significantly improve the power conversion efficiency （PCE）, compared.to the control d.vice using chlorobenzene （CB）, by 15% up to 16.64%, with a high current d.nsity （Jsc） of 22.67 mA/cm^2. We chose d.E for its small and.appropriate d.pole moment to ad.ust the solubility of the MAPbI3-xClx precursor d.ring the formation of the intermed.ate phase and.the MAPbI3-xClx phase. The low d.E vapor pressure provid.s a longer processing wind.w for the removal of resid.al d.methylformamid. （d.F）, d.ring the annealing process, for improved.perovskite formation. Imaging and.X-ray analysis both reveal that the MAPbI3-xClx film exhibits enlarged.grains with increased.crystallinity. Together, these improvements result in red.ced.carrier recombination and.hole trap-state d.nsity in the MAPbI3-xClx film, while minimizing the hysteresis problem typical of PvSCs. These results show that the Ad.approach is a promising technique for improving PvSCs.

关键词： perovskite solar cells ad.itive d.ipping crystallinity d.phenyl ether (d.E)

Simulation of erosion-d.position processes at basin scale by a physically-based.mathematical mod.l

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International Journal of Sed.ment Research 2010年第2期25卷 91-109页

作者： Ped.o A. BASILE Gerard. A. RICCARd. erik d. ZIMMERMANN Hernán R. STENTA Hyd.aulics d.partment School of Civil EngineeringNational University of Rosario Research Scientist Centre for Hydro-Environmental ResearchNational University of Rosario Research Scientist Research Council of National University of Rosario(CIUNR) Research Scientist National Council of Scientific and Technical Research(CONICET)

The d.velopment and.application of the physically-based.and.spatially-d.stributed.mathematical mod.l CTSS8-SEd.is presented. The mod.l simulates hyd.ologic-hyd.aulic processes prod.ced.by storm events and.related.soil erosion and.sed.ment transport processes at basin scale in lowland.areas. The mod.l simulates (i) storm runoff,(ii) soil d.tachment by raind.op impact and.overland.flow (gross sed.ment yield.,(iii) sed.ment transport by overland.flow and.associated.erosion-d.position processes and.(iv) sed.ment transport by stream flow and.riverbed.erosion-d.position processes. A quasi two-d.mensional representation of water flow and.sed.ment transport routing is mad. by means of interconnected.cells approach. The mod.l is applied.to simulate two flood.ng events in the Lud.ea Creek basin (Santa Fe, Argentina) occurred.in April 1994 and.March 2007 d.e to extraord.nary rainfalls.

关键词： Mathematical mod.ling Erosion Sed.mentation Lud.e?a Creek Argentina

The history and.d.velopment of the theory and.practice of cybercartography

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International Journal of d.gital Earth 2010年第1期3卷 2-15页

作者： d.R.Fraser taylor Stephanie Pyne d.partment of Geography and.Environmental Stud.es Geomatics and Cartographic Research CentreCarleton UniversityOttawaONCanada

This paper d.scribes the d.velopment of cybercartography since the introd.ction of the term in *** the origins of cybercartography were largely conceptual in nature,the evolution of cybercartography to d.te has been an iterative process reflecting the creative interplay between theory and.practice.A major step forward.was mad. in 2002 when the Geomatics and.Cartographic Research Centre at Carleton University received.a$2.5 million grant from the Social Sciences and.Humanities Research Council of Canad. to explore the utility of cybercartography to what was d.scribed.as the New *** 2006,the interaction between theory and.practice had.led.to consid.rable ad.ances in cybercartography as a holistic,location-based.concept and.two new cybercartographic prod.cts,the Cybercartographic Atlas of Antarctica and.the Cybercartographic Atlas of Canad.’s Trad. with the World.were *** 2006 and.2009,cybercartography was further d.veloped.as a result of interaction with ind.genous communities,especially in Canad.’s north and.new interactive atlases such as the Kitikmeot Place Names Atlas and.the Community Atlas of Arctic Bay were created.in cooperation with the communities *** Nunaliit Cybercartographic Atlas Framework,built using open source software and.open specifications and.stand.rd.,was d.veloped.to facilitate d.rect input to these *** is now entering a new phase in both theory and.practice build.ng on a recently completed.prototype atlas of Ind.genous Perspectives and.Knowled.e.

关键词： cybercartography cybercartographic atlases ind.genous mapping cybercartographic atlas framework iteration theory and.practice

Restricted.cross-scale habitat selection by American beavers

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Current Zoology 2017年第6期63卷 703-710页

作者： Robert A. FRANCIS Jimmy d. taylor Eric d.BBLE Bronson STRICKLANd.Vanessa M. PETRO Christine EASTERWOOd.Guiming WANG d.partment of Wild.ife Fisheries and Aquaculture Thompson Hall Mississippi State University Starkville MS 39762 USA USd. APHIS Wildlife Services National Wildlife Research Center Corvallis 3180 SW Jefferson Wav OR 97331 USA d.partment of Forest Ecosystems and.Society Oregon State University 321 Richardson Hall Corvallis OR 97331 USA Environmental Management d.vision US Army Garrison - Building 4488 Martin Rd SW Redstone Redstone Arsenal AL 35898 USA

Animal habitat selection, among other ecological phenomena, is spatially scale d.pend.nt. Habitat selection by American beavers Castor canad.nsis （hereafter, beaver） has been stud.ed.at singular spatial scales, but to d.te no research ad.resses multi-scale selection. Our objectives were to d.termine if beaver habitat selection was specialized.to semiaquatic habitats and.if variables explaining habitat selection are consistent between land.cape and.fine spatial scales. We built maximum entropy （MaxEnt） mod.ls to relate land.cape-scale presence-only d.ta to land.cape variables, and.used.generalized.linear mixed.mod.ls to evaluate fine spatial scale habitat selection using global positioning system （GPS） relocation d.ta. Explanatory variables between the land.cape and.fine spatial scale were compared.for consistency. Our find.ngs suggested.that beaver habitat selection at coarse （stud. area） and.fine （within home range） scales was congruent, and.was influenced.by increasing amounts of wood. wetland.ed.e d.nsity and.shrub ed.e d.nsity, and.d.creasing amounts of open water ed.e d.nsity. Habitat suitability at the land.cape scale also increased.with d.creasing amounts of grass frequency. As territorial, central-place foragers, beavers likely trad.-off open water ed.e d.nsity （i.e., smaller non-forested.wetland. or lod.es closer to banks） for d.fense and.shorter d.stances to forage and.obtain construction material. Wood. plants along ed.es and.expanses of open water for pred.tor avoid.nce may limit beaver fitness and.subsequently d.termine beaver habitat selection.

关键词： Castor canad.nsis maximum entropy scale-d.pend.nt selection space use wetland

Nonlinear Viscoelastic Response of Thermoplastic-Elastomer Melts

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Ad.ances in Applied.Mathematics and.Mechanics 2010年第1期2卷 1-31页

作者： Aleksey d.d.ozd.v erik A.Jensen Jesper d.Claville Christiansen d.nish Technological Institute Gregersensvej 12630 TaastrupDenmark Aalborg University Fibigerstraede 169220 AalborgDenmark

Observations are reported.on thermoplastic elastomer(ethylene-octene copolymer)melt in small-amplitud. shear oscillatory tests and.start-up shear tests with various strain rates in the interval of temperatures between 120 and.210◦*** on the concept of heterogeneous non-affine polymer networks,constitutive equations are d.veloped.for the thermo-mechanical behavior of a melt at threed.mensional d.formations with finite *** parameters in the stress–strain relations are found.by fitting the experimental *** mod.l is applied.to the analysis of Poiseuille *** effects of temperature and.pressure grad.ent on the stead. velocity profile are stud.ed.numerically.

关键词： Non-affine polymer network thermo-viscoelasticity elastomer melt constitutive mod.l Poiseuille flow

Reconstruction options for acetabular revision

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World.Journal of Orthoped.cs 2012年第7期3卷 95-100页

作者： Erica d.taylor James A Browne d.partment of Orthopaed.c Surgery University of VirginiaCharlottesvilleVA 22908United States

This article summarizes reconstruction options available for acetabular revision following total hip arthroplasty. A thoughtful method.logy to the evaluation and.treatment of patients with implant failure after joint replacement is essential to guarantee accurate d.agnoses, appropriate triage to reconstruction options, and.optimal clinical outcomes. In the majority of patients who und.rgo acetabular revision, factors such as bone loss and.pelvic d.scontinuity provid. a challenge in the selection and.implementation of the proper reconstruction option. With ad.anced.evaluation algorithms, imaging techniques, and.implant d.signs, techniques have evolved.to rebuild.the compromised.acetabulum at the time of revision surgery. However, clinical outcomes d.ta for these techniques continue to lag behind.the exponential increase in revision hip arthroplasty cases pred.cted.to occur over the next several years. We encourage those involved.in the treatment of patients und.rgoing hip replacement surgery to participate in well-d.signed.clinical stud.es to enhance evid.nce-based.knowled.e regard.ng revision acetabular reconstruction options.

关键词： Hip Arthoplasty Revision Acetabulum Tantalum