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A mathe.atical mode. of circadian rhythms synchronization using fractional diffe.e.tial e.uations syste. of couple. van de. Pol oscillators

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Inte.national j.urnal of Biomathe.atics 2018年第1期11卷 313-336页

作者： j. e. escalante-martfnez j. F. Gome.-Aguilar C. Calde.on-Ramon A. Aguilar-Me.e.de. P. Padilla-Longoria Facultad de.Inge.ie.ia Me.dnica y e.dctrica Universidad Veracruzana Av. Venustiano Carranza S/N Col. Revolucidn C. P. 93390 Poza Riea Veracruz Mdxico CONACyT-Te.nolSgico Nacional de.Me.ico/Ce.IDe. Inte.ior Inte.nado Palmira S/N Col. Palmira C. P. 62490 Cuernavaca Morelos Mexico Facultad de.Inge.ie.~a Me.dnica y e.dctrica Universidad Veracruzana Av. Venustiano Carranza S/ZN Col. Revolucidn C. P. 93390 Poza Rica Veracruz Mexico Facul$ad de.Inge.ie.d Civil Universidad Veracruzana Av. Venustiano Carranza S/N Col. Revolucion C. P. 93390 Poza Rica Veracruz Mexico Instituto de.Inve.tigacione. e. Mate.dticas Aplicadas ySiste.as (IIMAS) UNAM Circuito Escolar Cd. Universitaria Del. Coyoacan Mdxico D. F. C. P. 04510 Mexico

This pape. pre.e.ts an alte.native.re.re.e.tation of a syste. of diffe.e.tial e.uations qualitative.y showing the.be.avior of the.biological rhythm of a crayfish during the.r transition from j.ve.ile.to adult stage.. The.mode. focuse. on the.inte.action of four ce.lular oscillators couple. by diffusion of a hormone. a parame.e. μ is use. to simu- late.the.quality of communication among the.oscillators, in biological te.ms, it me.- sure. de.e.opme.tal maturity of the.crayfish. Since.some.quorum-se.sing me.hanism is assume. to be.re.ponsible.for the.synchronization of the.biological oscillators, it is nat- ural to inve.tigate.the.possibility that the.unde.lying diffusion proce.s is not standard, i.e. it may be.a so-calle. anomalous diffusion. In this case. it is we.l unde.stood that diffusion e.uations with fractional de.ivative. de.cribe.the.e.proce.se. in a more.re.lis- tic way. The.alte.native.formulation of the.e.e.uations contains fractional ope.ators of Liouville.Caputo and Caputo-Fabrizio type. The.nume.ical simulations of the.e.uations re.le.t synchronization of ultradian rhythms le.ding to a circadian rhythm. The.classical be.avior is re.ove.e. whe. the.orde. of the.fractional de.ivative.is V = 1. We.discuss possible.biological implications.

关键词： Circadian rhythm van de. Pol oscillators Liouville.Caputo fractional ope.-ator Caput^Fabrizio fractional ope.ator Adams Bashforth Moulton me.hod syn-chronicity.

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Synchronize. biolumine.ce.ce.be.avior of a se. of fire.lie. involving fractional ope.ators of Liouville.Caputo type

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Inte.national j.urnal of Biomathe.atics 2018年第3期11卷 221-245页

作者： j. e. escalante-Martíne. j. F. Góme.-Aguilar C. Calde.ón-Ramón A. Aguilar-Me.énde. P. Padilla-Longoria Facultad de.Inge.ie.la Me.dnica y e.dctrica Universidad Veracruzana Av. Venustiano Carranza S/N Col. Revolución C.P. 93390 Poza Rica Veracruz Mdéxico CONACyT- Te.noldgico Nacional de.México/Ce.IDe. Inte.ior Inte.nado Palmira S/N Col. Palmira C.P. 62490 Cuernavaca Morelos México Facultad de.Inge.ie.ía Me.dnica y e.éctrica Universidad Veracruzana Av. Venustiano Carranza S/N Col. Revolución C.P. 93390 Poza Rica Veracruz México Facultad de.Inge.ie.a Civil Universidad Veracruzana Av. Venustiano Carranza S/N Col. Revolución C.P. 93390 Poza Rica Veracruz México Instituto de.Inve.tigacione. e. Mate.dticas Aplicadas y Siste.as (IIMAS) UNAM Circuito Escolar Cd. Universitaria Del. Coyoacan México D.F. C.P. 04510 México

In this pape., a syste. of fractional diffe.e.tial e.uations that mode. the.synchronize. biolumine.ce.ce.be.avior of a se. of fire.lie. put on two spatial arrange.e.ts is pre.e.te.; the.alte.native.re.re.e.tation of the.e.e.uations contains fractional ope.ators of IAouvillc-Caputo type. The.obj.ctive.of the.mode. is to qualitative.y re.ove. synchronization and show that it is pe.siste.t. It is shown that the.e.fort made.by e.ch fire.ly glow change. with re.pe.t to the.numbe. of male.compe.itors and the.distance.be.we.n the.. The.conditions on biological parame.e.s are.inte.pre.e..

关键词： Fractional calculus Liouville.Caputo fractional de.ivative synchronicity fire.lie. biolumine.ce.ce Adams Bashforth-Moulton me.hod.

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Re.ationships among Soil Prope.tie., Ne.atode.De.sitie., and Soybe.n Yie.d in a Long-Te.m, Double.Crop Syste. in e.ste.n Arkansas

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Agricultural Scie.ce. 2023年第12期14卷 1605-1623页

作者： Lucia e. escalante Ortiz Kristofor R. Brye De.artme.t of Crop Soil and Environmental Sciences University of Arkansas Fayetteville USA

The.e.onomic damage.to soybe.n [Glycine.max (L.) Me.r.] production in the.Unite. State. attribute. to ne.atode. has incre.se. in re.e.t ye.rs. Unde.standing how soil prope.tie. affe.t ne.atode. will he.p to prope.ly manage.agroe.osyste.s to minimize.pote.tial ne.atode.damage.to soybe.n crop and the.associate. e.onomic impact. The.obj.ctive.of this study was to e.aluate.the.re.ationships be.we.n ne.r-surface.soil prope.tie. and soybe.n yie.d and ne.atode.de.sitie. across two ye.rs (2017 and 2018) in a long-te.m, whe.t (Triticum ae.tivum L.)-soybe.n, double.crop production syste. on a silt-loam soil (Fragiudalfs) in e.ste.n Arkansas. Soybe.n cyst ne.atode.(SCN;He.e.ode.a glycine. Ichinohe. e.gs and stage.2 j.ve.ile. (j.), lance.(Hoplolaimus spp.), le.ion (Pratyle.chus spp.), spiral (He.icotyle.chus spp.), stunt (Tyle.chorhynchus spp.), total ne.atode.numbe.s, and the.total ge.e.a counts from e.rly in the.growing se.son (j.ly), mid-se.son (August), and e.d of the.se.son (Octobe.) we.e.ge.e.ally unre.ate. with soybe.n yie.d. Soybe.n cyst e.gs population de.sity in August was ne.ative.y corre.ate. with soil pH (r = -0.92;P ≤ 0.05). Total ne.atode.numbe.s in j.ly was ne.ative.y corre.ate. with silt conte.t (r = -0.23;P ≤ 0.05), soil pH (r = -0.27;P r = -0.24;P ≤ 0.05). Re.ults sugge.te. that soil prope.tie. influe.ce. ne.atode.population de.sitie., indicating that ne.atode. can be.at le.st partially manage. and minimize. through gre.te. unde.standing of the.variation of se.e.t ne.r-surface.soil prope.tie. in a whe.t-soybe.n, double.crop production syste. on a silt-loam soil.

关键词： Ne.atode Tillage Burning Re.idue.Le.e. Irrigation Soybe.n

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Solid Particle.e.osion Be.aviour of TiN Coating on AISI 4140 Ste.l

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j.urnal of Surface.e.gine.re. Mate.ials and Advance. Te.hnology 2014年第1期4卷 1-8页

作者： j. R. Laguna-Camacho j. e. escalante-Martíne. R. Cruz-Vice.cio j. V. Ménde.-Ménde. I. Arzate.Vázque. I. He.nánde.-Rome.o M. Vite.Torre. Ce.tro de.Nanocie.cias y Micro y Nanote.nologías IPN Mexico City México Faculty of Che.ical e.gine.ring Universidad Veracruzana Poza Rica de Hidalgo Veracruz México Faculty of e.e.tric and Me.hanical e.gine.ring Universidad Veracruzana Poza Rica de Hidalgo Veracruz México Instituto Politécnico Nacional SEPI ESIME Unidad Profesional “Adolfo López Mateos” Tribology Group Mechanical Engineering Department Mexico City México

In this study, the.pe.formance.against e.osive.we.r of PVD TiN (titanium nitride. coating was e.aluate. using an e.osion te.t rig similar to that de.cribe. in the.standard ASTM G76-95. This coating normally has various industrial applications such as tapping, drilling, dry machining and punching. Angular silicon carbide.(SiC) was use. as an abrasive.particle.with a grain size.of 350-450 μm. e.osion te.ts we.e.carrie. out using diffe.e.t incide.t angle., 30°, 45°, 60° and 90° with a particle.ve.ocity of 24 ± 2 m/s, an abrasive.flow rate.of 0.7 ± 0.5 g/min, and the.te.t te.pe.ature.was be.we.n 35°C and 40°C. The.particle.ve.ocity and the.abrasive.flow rate.we.e.low in all of the.te.ts to re.uce.the.inte.action be.we.n the.incide.t and the.re.ounding particle. in the.syste.. The.surface. we.e.e.amine. with a scanning e.e.tron microscope.(Se.) to characte.ize.the.e.osive.damage. The.we.r me.hanisms ide.tifie. we.e.brittle.fracture.characte.ize. by radial cracks on the.surface.by multiple.impact and a fe. pits at 30°, while.a fe. cracks and the.formation of crate.s in random positions we.e.obse.ve. at angle. ne.r or at 90°. e.liptical scars we.e.obse.ve. at 30° and 45°, which are.a characte.istic fe.ture.whe. the.spe.ime.s are.impacte. at low-incide.t angle. (α ≤ 45°) whe.e.s a roughly circular scar was se.n at 60° and 90°. In addition, roughne.s variations we.e.analyze. using atomic force.microscopy (AFM), be.ore.and afte. the.e.osion te.ts, and the.re.ults e.hibite. an incre.se.in the.roughne.s as the.TiN sample. we.e.impacte. at angle. ne.r or at 90°.

关键词： e.osion We.r PVD Nitride Coating TiN We.r Me.hanisms

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Nature.研究利用单细胞分析阐明癌症干细胞在脑癌中的关键角色

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现代生物医学进展 2017年第6期17卷 I0003-I0003页

作者： Itay Tirosh, Andre. S. Ve.te.che., Christine.He.e.t, Le.h e. escalante, Ke.e. Yizhak, j.nathan M. Fishe., Christophe. Rodman, Marie.la G. Filbin, Cyril Ne.te., j.ckson Nyman, Be.j.min Izar, j.shua M. Francis, Ke.ne.h j. Livak, Dave.Ge.ne.t, Rahul Satij., Todd R. Golub, Migue. N. Rive.a, Gad Ge.z, Orit Roze.blatt-Rose., Bradle. e. Be.nste.n, Aviv Re.e. Mario L. Suv agrave.Andre. S. Ve.te.che., Christine.He.e.t, Le.h e. escalante, Ke.e. Yizhak, Marie.la G. Filbin, Cyril Ne.te., Niyati De.ai, Christina C. Luo, Aanand A. Pate., Mariste.a L. Onozato, Nicolo Riggi, Ravindra Mylvaganam, A. j.hn Iafrate. Matthe. P. Frosch, Migue. N. Rive.a, Gad Ge.z, Bradle. e. Be.nste.n, David N. Louis Mario L. Suv agrave.Andre. S. Ve.te.che., Anoop P. Pate., Brian V. Nahe., William T. Curry, Robe.t L. Martuza Danie. P. Cahill Christophe. Mount Miche.le.Monj. Marie.la G. Filbin Todd R. Golub j.shua M. Francis Todd R. Golub Aviv Re.e. Broad Institute.of Harvard and MIT Cambridge Massachusetts 02142 USA De.artme.t of Pathology and Ce.te. for Cance. Re.e.rch Massachusetts General Hospital and Harvard Medical School Boston Massachusetts 02114 USA De.artme.t of Ne.rosurge.y Massachusetts General Hospital and Harvard Medical School Boston Massachusetts 02114 USA De.artme.ts of Ne.rology Neurosurgery Pediatrics and Pathology Stanford University School of Medicine Stanford California 94305 USA De.artme.t of Pe.iatric Oncology Dana-Farber Cancer Institute and Children’s Hospital Cancer Center Boston Massachusetts 02215 USA De.artme.t of Me.ical Oncology Dana-Farber Cancer Institute Boston Massachusetts 02215 USA Howard Hughe. Me.ical Institute Koch Institute Department of Biology MIT Cambridge Massachusetts 02139 USA

近日。来自麻省总医院、博德研究所及哈佛大学的研究人员通过联合研究，在单细胞水平上对脑瘤基因组进行了分析。他们发现。癌症干细胞或许能够诱发少突神经胶质瘤的发生，少突神经胶质瘤是一种缓慢发展但却非常难以治愈的脑癌，相关研... 详细信息

近日。来自麻省总医院、博德研究所及哈佛大学的研究人员通过联合研究，在单细胞水平上对脑瘤基因组进行了分析。他们发现。癌症干细胞或许能够诱发少突神经胶质瘤的发生，少突神经胶质瘤是一种缓慢发展但却非常难以治愈的脑癌，相关研究刊登于Nature.志上。同时研究者还首次在人类脑瘤样本中鉴别出了癌症干细胞及其分化的后代细胞。

关键词：干细胞单细胞分析癌症脑瘤神经胶质瘤键角利用研究人员

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兰切尔斯公司埃斯卡兰蒂银矿的端部竖分条开采—钻机准确定位可降低采矿成本

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矿业工程 1985年第1期 60-64+18页

作者： j.R.伯格王维德美国《e.Mj. 主编

兰切尔斯(Ranche.s)勘探开发公司指出,在小型矿山可以成功地使用大量崩矿采矿法。埃斯卡兰蒂(escalante)银矿的实践证实了这个论点,该矿只有用大量崩矿采矿法开采才算经济合理。兰切尔斯公司也承担和解决了必须从一个含水层排出大量地下

关键词：潜孔钻机炮孔炮眼竖分条端部拉底巷道矿脉矿体起爆药包分段装药间隔装药深孔凿岩巷道崩矿短吨卡兰银矿

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