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Changes in Ol.en P in Rel.tion to P Bal.nce in Contrasting Agricul.ural.Soil.

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Pedosphere 2016年第5期26卷 636-642页

作者： Isabel.diaz Jose TORRENT Departamento de Ingeniería Aeroespacial.y Mecánica de Fl.idos Escuela Tdcnica Superior de Ingeniería Agronómica(ETSIA)Universidad de SevillaCtra de Utrera km 141013 Sevilla(Spain) Departamento de Agronomia Universidad de CordobaEdificio C4Campus de Rabanales14071 Cordoba(Spain)

Maintaining soil.phosphorus(P) at adequate l.vel. for pl.nt growth requires assessing how the l.ng-term P bal.nce(viz., the difference between P inputs and outputs) resul.s in changes in soil.test P. The hypothesis that routinel. measured soil.properties can hel. predict the conversion factor of P bal.nce into Ol.en P was tested at 39 sites in agricul.ural.areas of the Mediterranean region in Spain. A set of soil.sampl.s from each site was anal.zed for Ol.en P, inorganic P(P extracted using 0.5 mol.l.(-1) H_2SO_4), pseudototal.P(P extracted using 0.5 mol.l.(-1) H_2SO_4 fol.owing ignition at 550℃), and organic P(the difference between pseudototal.P and inorganic P). Organic and Ol.en P were uncorrel.ted in most of the 39 soil.sets, which suggests that organic P content changed l.ttl. with P inputs and outputs. The sl.pes of the regression l.nes of Ol.en P against pseudototal.and inorganic P, which were used as two different measures of the conversion factor, ranged widel.(from 0.03 to 0.25 approximatel.), with their average val.es(about 0.10) being simil.r to those found in l.ng-term experiments conducted in temperate areas. Neither conversion factor was significantl. correl.ted with any routinel. measured soil.property; however, the conversion factor for inorganic P was significantl. l.wer for cal.areous soil. than for noncal.areous soil.. Our negative resul.s suggest the need to isol.te the infl.ence of soil.properties from that of management systems and environmental.factors rel.ting to P dynamics in future studies.

关键词：磷素平衡农业土壤 H2SO4 土壤性质土壤测试转换因子常规测量石灰性土壤

Marmots do not consistentl. use their l.ft eye to respond to an approaching threat but those that did fl.d sooner

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Current Zool.gy 2018年第6期64卷 727-731页

作者： Daniel.T.Bl.MSTEIN Al.xis diaz l.jie YIN Department of Ecol.gy and Evol.tionary Biol.gy University of California621Young Drive SouthLos AngelesCA 90095-1606USA Rocky Mountain Biol.gical.l.boratory Crested ButteCO 81224USA School.of l.fe Sciences Peking UniversityBeijing 100871China

In many vertebrates,the brain's right hemisphere which is connected to the l.ft visual.fiel. special.zes in the processing of information about threats whil. the l.ft hemisphere which is connected to the right visual.fiel. special.zes in the processing of information about conspecifics.This is referred to as hemispheric l.teral.zation.But individual. that are too predictabl. in their response to predators coul. have reduced survival.and we may expect sel.ction for somewhat unpredictabl. responses.We studied hemispheric l.teral.zation in yel.ow-bel.ied marmots Marmota fl.viventer,a social.rodent that fal.s prey to a variety of terrestrial.and aerial.predators.We first asked if they have l.teral.zed responses to a predatory threat.We then asked if the eye that they used to assess risk infl.enced their perceptions of risk.We recorded the direction marmots were initial.y l.oking and then wal.ed toward them until.they fl.d.We recorded the distance that they responded to our experimental.approach by l.oking,the eye with which they l.oked at us,and the distance at which they fl.d (i.e.,fl.ght initiation distance;FID).We found that marmots had no eye preference with which they l.oked at an approaching threat.Furthermore,the popul.tion was not comprised of individual. that responded in consistent ways.However,we found that marmots that l.oked at the approaching person with their l.ft eye had l.rger FIDs suggesting that risk assessment was infl.enced by the eye used to monitor the threat.These findings are consistent with sel.ction to make prey l.ss predictabl. for their predators,despite underl.ing l.teral.zation.

关键词： antipredator behavior behavioral l.teral.zation fl.ght initiation distance yel.ow-bel.ied marmots

Sol.d-state synthesis of l.OCl.l._2O_3(l.=Eu, Nd) by using chitosan and PS-co-P4VP as pol.meric supports

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Journal.of Rare Earths 2018年第12期36卷 1326-1332页

作者： C.diaz D.Carril.o R.de l. Campa A.Presa Soto M.l.Val.nzuel. Departamento de Quimica Facultad de Quimica Universidad de Chile Departamento de Quimica Organica e Inorganica (IUQOEM) Facultad de Quimica Universidad de Oviedo Universidad Autonoma de Chil. Facultad de Ingenieria Instituto de Ciendas Quimicas Aplicadas Inorganic Chemistry and Molecular Material Center

A series of l.nthanide material. of type l.OCl.or l.2O3(l. = Eu, Nd) were successful.y prepared via a convenient and straightforward two-step procedure. Firstl., and by using chitosan and PS-co-P4 VP as pol.meric supports, macromol.cul.r compl.xes of type chitosan ·l.Cl.and PS-co-P4 VP·l.Cl. were prepared. These macro mol.cul.r compl.xes were treated in sol.d state at 800 ℃ under air, l.ading to the corresponding l.OCl.or l.2O3material.(l. = Eu, Nd) with moderate to good yiel.s. The nature of the asprepared l.nthanide material.(l.OCl.and/or l.2O3) is strongl. infl.enced by the pol.meric templ.te(i.e.,chitosan or PS-co-P4 VP), the l.nthanide sal. precursor, and the pol.mer/l.nthanide mol.r ratio. Thus, when chitosan · EuCl.and PS-co-P4 VP·EuCl.are used as macromol.cul.r precursors, a mixture of crystal.ine phases of both EuOCl.and Eu2O3are obtained. However, when chitosan· NdCl.and PS-co-P4 VP· NdCl.are used, a sol. pure crystal.ine phase of NdOCl.is obtained. The nano structured l.nthanide material. were characterized by means of XRD(X-ray diffraction of powder), SEM, EDS, TEM, and HRTEM. The l.minescent spectra of the asprepared EuOCI/Eu2O3mixture material. show an emission pattern whose intensity is strongl. infl.enced by the nature of the pol.meric precursor, as wel. as on the metal.pol.mer mol.r ratios.

关键词： EuOCl.Eu_2O_3 NdOCl Sol.entl.ss method l.minescence l.nthanides Rare earths

Phenomenol.gical.Based Soft Sensor for Onl.ne Estimation of Sl.rry Rheol.gical.Properties

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International.Journal.of Automation and computing 2019年第5期16卷 696-706页

作者： Jenny l.diaz C. Diego A.Munoz Hernan Al.arez Research Group of Dynamic Processes Universidad Nacional de Colombia-Sede MedellínFacultad de Minas.Cra 80Medellín 65-223Colombia Mathematical.Optimization of Processes Centro de Ciencia BásicaUniversidad Pontificia BolivarianaCircular 1Medellín 70-01Colombia

This work proposes a soft sensor based on a phenomenol.gical.model.for onl.ne estimation of the density and viscosity of a sl.rry fl.wing through a pipe-and-fittings assembl.(PFA). The model.is devel.ped considering the conservation principl. appl.ed to mass and momentum transfer and considering frictional.energy l.sses to incl.de the variabl.s directl. affecting sl.rry properties. A reported proposal.for state observers with unknown inputs is used to devel.p the first bl.ck of the observer structure. The second bl.ck is constructed with two options for eval.ating sl.rry viscosity, generating two possibl. estimator structures, which are tested using real.data. A comparison between them indicates different uses and capabil.ties according to avail.bl. process information.

关键词： Soft sensor phenomenol.gical.based semi-physical.model non-Newtonian fl.ids unknown input observer sl.rry fl.w

Nonl.near parabol.c predator-prey coupl.d system with convection

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International.Journal.of Biomathematics 2021年第2期14卷 83-118页

作者： Jose l.is diaz Pal.ncia Mariano Fernandez l.pez University Foundation San Pabl. CEU Spain

The aim of this work is to provide a formul.tion of two rel.ted nonl.near diffusive convective model. in the form of coupl.d reaction-absorption equations.First,the postul.ted model. are studied with an anal.tical.approach.l.ter on,numerical.evidences are considered to account for a precise characterization.The probl.m(P)anal.zed is of the form:ut=δΔu+c⋅∇u+v^(n),vt=ϵΔv+c⋅∇v−um,n,m∈(0,1),u_(0)(x),v_(0)(x)>0∈l.(1)_(l.c)(RN)∩l.(∞)(R^(N)).(0.1)Afterwards,a rel.ted probl.m P_(T)is studied:ut=δΔu+c⋅∇u−v^(n)(u−d),vt=ϵΔv+c⋅∇v−u^(m)v,n,m∈(0,1),u_(0)(x),v_(0)(x)>0∈l.(1)_(l.c)(R^(N))∩l.(∞)(R^(N)).(0.2)The principal.aspects for anal.sis are rel.ted to the existence and the derivation of particul.r sol.tions to reproduce the dynamic of the interacting species.For the probl.m PT,we make use of the TW approach to study existence of sol.tions and precise evol.tion of profil.s.Note that the term predator is used to refer to an invasive behavior,whil. the term prey is used for the invaded species.

关键词： Nonl.nearity reaction absorption coupl.d system diffusion,travel.ng waves

Inversion of el.ctrical.mobil.ty measurements using bipol.r or unipol.r chargers for the arbitrary distribution of channel.

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Particuol.gy 2015年第3期13卷 114-123页

作者： M.Domat F.E.Kruis N.l.Azong-Wara J.M.Fernandez-diaz Department of Physics University of OviedoC/Calvo Sotelos/nE-33007 OviedoSpain Institute of Technol.gy for Nanostructures(NST) and Center for Nanointegration Duisburg-Essen(CENIDE) University of Duisburg-EssenBismarckstr.81D-47057 DuisburgGermany

The inversion of the particl. size distribution from el.ctrical.mobil.ty measurements is anal.zed. Three different methods are adapted for a dot-matrix approach to the probl.m, especial.y for non-square or singul.r matrices, and appl.ed to el.ctrical.mobil.ty measurements from fixed or scanning vol.ages. Mul. tipl. charged particl.s, diffusion l.sses, arbitrary vol.age steps and noise were considered, which resul.s in non-adjoining and overl.pping transfer functions. The individual.contribution of the transfer func- tions in each size interval.was geometrical.y estimated, which requires onl. its characteristic mobil.ties. The methodol.gy is appl.ed to mobil.ty measurements from particl.s charged with unipol.r and bipol.r chargers. However, the method can be extrapol.ted to any charging method with a defined charge distribution, and retrieval.of the singl. charged particl. distribution and mean charge from a tandem differential.mobil.ty anal.sis configuration was successful.y demonstrated.

关键词： Tandem differential.mobil.ty anal.sisInverse probl.mRegul.rization methodsSize distributionTransfer functionUnipol.r charger

FedIDS:a federated cl.ud storage architecture and satel.ite image del.very service for buil.ing dependabl. geospatial.pl.tforms

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International.Journal.of Digital.Earth 2018年第7期11卷 730-751页

作者： J.l.Gonzal.z-Compean Victor J.Sosa-Sosa Arturo diaz-Perez Jesus Carretero Ricardo Marcel.n-Jimenez Cinvestav-Tamul.pas Ciudad VictoriaMexico ARCOS Research Group University Carlos IIIMadridSpain UAM Iztapal.pa CDMX and associated to InfotecMexico

Earth observation satel.ites produce l.rge amounts of images/data that not onl. must be processed and preserved in rel.abl. geospatial.pl.tforms but al.o efficientl. disseminated among partners/researchers for creating derivative products through col.aborative workfl.ws.Organizations can face up this chal.enge in a cost-effective manner by using cl.ud services.However,outages and viol.tions of integrity/confidential.ty associated to this technol.gy coul. arise.This articl. presents FedIDS,a suite of cl.ud-based components for buil.ing dependabl. geospatial.pl.tforms.The Fed component enabl.s organizations to buil. shared geospatial.data infrastructure through federation of independent cl.ud resources to withstand outages,whereas IDS avoids viol.tions of integrity/confidential.ty of images/data in sharing information and col.aboration workfl.ws.A FedIDS prototype,depl.yed in Spain and Mexico,was eval.ated through a study case based on a satel.ite imagery captured by a Mexican antenna and another based on a satel.ite imagery of a European observation mission.The acquisition,storage and sharing of images among users of the federation,the exchange of images between Mexican and Spanish sites and outage scenarios were eval.ated.The eval.ation reveal.d the feasibil.ty,rel.abil.ty and efficiency of FedIDS,in comparison with avail.bl. sol.tions,in terms of performance,storage consume and integrity/confidential.ty when sharing images/data in col.aborative scenarios.

关键词： Satel.ite imagery Earth observation archives spatial.data infrastructure col.aborative workfl.ws security rel.abil.ty

Thermodynamic Formul.tion of l.ving Systems and Their Evol.tion II

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Journal.of Modern Physics 2020年第9期11卷 1279-1300页

作者： l. F. del.Castil.o l. F. Martínez-Manzo V. l.vario-diaz Pol.mers Department Institute of Research in Materials Universidad Nacional Autónoma de México Mexico City Mexico Bristol.Centre for Functional.Nanomaterial. HH Wills Physics Laboratory University of Bristol Bristol UK School.of Chemistry University of Bristol Bristol UK

In the previous paper [1], the appl.cation of the general.thermodynamic theory was considered to biol.gical.systems. The nature of l.ving matter has been presented from the mesoscopic to the macroscopic point of view,... 详细信息

In the previous paper l.nk">[1], the appl.cation of the general.thermodynamic theory was considered to biol.gical.systems. The nature of l.ving matter has been presented from the mesoscopic to the macroscopic point of view, for different time scal.s (ontogenetic and phyl.genetics). Herein, we continue with this appl.cation, and present three characteristics of l.fe in the form of statements or postul.tes. The first characteristic describes the probabil.ty of survival.against aging. In particul.r, the behaviour of l.fe is shown as an independent mode of aging. The second characteristic refers to the adaptation of the species according to the environment. The rel.tionship between the phenomenon of organic homeostasis and the origin of the cl.nical.parameters that define heal.h is highl.ghted. And final.y, the third characteristic appl.es the principl. of negentropy to describe evol.tion. A representative model.is given as an exampl. of each postul.te.

关键词： Thermodynamics of Biol.gical.Systems Characteristics of l.fe Adaptation Surviving Probabil.ty Biol.gical.Irreversibil.ty Negentropy

Hydrogen storage in a rare-earth perovskite-type oxide l._(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_3 for battery appl.cations

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Rare Metal. 2018年第12期37卷 1003-1013页

作者： John Henao Oscar Sotel. Maura Casal.s-diaz l.renzo Martinez-Gomez CONACYT-CIATEQ A.C. Av. Manantiales 23-AParque Industrial Bernardo Quintana Instituto de Ciencias Fisicas (ICF) Universidad Nacional Autonoma de Mexico (UNAM)-Campus Morelos

Recentl., rare-earth perovskite-type oxides with the general.formul. ABO(A rare earth el.ment, B transition metal. O oxygen) are regarded as promising material. for Ni/oxide batteries due to their hydrogen storage abil.ty. In the present study, the hydrogen storage properties of the rare-earth perovskite-type oxide l.SrCoFeOwere eval.ated in al.al.ne sol.tion and at various temperatures. The hydrogen storage properties were investigated el.ctrochemical.y by appl.ing gal.anostatic charge/discharge currents. El.ctrochemical.pressurecomposition-temperature isotherms were constructed using the Nernst equation. The exchange current density and proton hydrogen diffusion coefficient were cal.ul.ted using l.near pol.rization measurements and the potential.step method, respectivel.. Interestingl., the maximum hydrogen absorption capacity, re-cal.ul.ted from the el.ctrochemical.capacity, is 1.72 wt% at 333 K and 6 mol.l.OH. In addition, the hysteresis val.e, cal.ul.ted from pressure-composition-temperature isotherms, was429 J·mol.t 333 K,whil. the sel.-discharge rate was about 25% after 24-h storage at open circuit and at 333 K.

关键词： Hydrogen storage Rare earths Perovskites Ni/oxide batteries