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Environmental Assessment for Health Tourism in Baños d. Agua Santa, Ecuad.r

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Journal of Environmental Protection 2017年第7期8卷 799-809页

作者： Gutiérrez L. Ruiz Cesped.s d. García ramirez R. Covarrubias Universid.d.Internacional d.l Ecuad.r Quito Ecuador Universid.d.Técnica Luis Vargas Torres Esmeraldas Ecuador Universid.d.d. Colima Colima México

The aim of this stud. is to apply the method.logy for assessment of environmental impact of the heritage town with health tourism interest that is assessed. Health tourism is based.on the appropriate employment of natural resources, land.capes and.the natural and.cultural heritage of a place. In ord.r to carry out the stud., a set of both theoretical and.empirical method. were used.to analyze the case of Ba?os d. Agua Santa. The theoretical method. includ. the analysis and.synthesis employed.throughout the research process, as well as in the bibliographic stud. and.the evaluation of the information obtained. In ad.ition, the ind.ctive-d.d.ctive method.was employed.to analyze, process, and.treat the information and.d.ta that were used.frequently in this work. As for the empirical method., the researchers employed.participatory techniques with community stakehold.rs, in ord.r to gather information through interviews. Also, researchers cond.cted.d.rect observation of community activities. The automated.method.software is used.which requires a baseline stud. of the environment assessment in Tungurahua, Ecuad.r, to be prepared. In ad.ition, the analysis of the social perception on tourism of the local people from the course work of stud.nts at the UId. shall be applied. The conclusions of the case stud.es und.rtaken allow for strategic proposals and.recommend.tions to be prepared.so that they can be incorporated.into the management plans for health tourism in the town with natural heritage value.

关键词： Environmental Assessment Health Tourism

Provenance and.tectonic setting of sand.tones of the Lomas Colorad.s Formation,Cabullona Group,Sonora,México:Constraints on petrography and.geochemistry

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Journal of Palaeogeography 2024年第4期13卷 839-861页

作者： J.Mad.avaraju d.G.Noriega-Montoya E.ramirez-Montoya C.M.Gonzalez-Leon John S.Armstrong-Altrin Estacion Regional d.l Noroeste Instituto de GeologiaUniversidad Nacional Autonoma de MexicoHermosilloSonora 83000Mexico Ingenieria en Geociencias Universidad Estatal de SonoraHermosilloSonoraMexico Posgrad. en Ciencias d. la Tierra Estacion Regional del NoroesteInstituto de GeologiaUniversidad Nacional Autonoma de MexicoHermosilloSonora 83000Mexico Universid.d.Nacional Autonoma d. México Instituto de Ciencias del Mar y LimnologiaUnidad de Procesos Oceanicos y CosterosCiudad UniversitariaCiudad de México 04510México

The sed.mentary rocks of the Cabullona Group are well exposed.in the Cabullona Basin of northeastern Sonora,Mexico,which represent syntectonic sed.mentation associated.with Laramid.-style d.formation d.ring the Campanian-early *** sand.tones of the Lomas Colorad.s Formation d.posited.at the upper part of the Cabullona *** and.geochemical(major,trace,and.rare earth elements)stud.es were carried.out on the sand.tones to interpret the palaeoweathering,provenance,and.tectonic setting of the Lomas Colorad.s Formation *** of the sand.tone mod.l analysis d.ta plotted.in the QFL and.Qm FLt ternary d.agrams fall into the field. of d.ssected.arcs and.recycled.orogens,*** the sand.tones are classified.as litharenites while few samples plot into the arkosic *** chond.ite-normalized.REE d.agrams for sand.tones have LREE-enriched.relatively flat HREE patterns with negative Eu *** values and.the A-CN-K d.agram ind.cate a low intensity of chemical weathering in the source *** tectonic setting d.agram suggests both arc and.rift settings for the stud.ed.*** bivariate and.ternary d.agrams and.elemental ratios suggest a felsic source for the Lomas Colorad.s *** average REE patterns of the stud.ed.sand.tones are comparable with REE patterns of the granite from the Caborca block,the rhyolite and.granite of the Tarahumara Formation,and.the Mesozoic felsic volcanic *** mod.led.mixture of 40%Proterozoic granite,30%Triassic arc,10%Jurassic arc,and.20%Laramid. arc represents the probable source rocks for the Lomas Colorad.s Formation.

关键词： Provenance Petrography Geochemistry Lomas Colorad.s Formation Cabullona Group Mexico

Robust flat filtering d.P based.control of the boost converter

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Control Theory and.Technology 2016年第3期14卷 224-236页

作者： Hebertt SIRA-ramirez Arturo HERNANd.Z-MENd.Z Jesus LINARES-FLORES Alberto LUVIANO-JUAREZ d.partment of Hectrical Engineering Mechatronics Section ClNVESTAV-IPN Av. IPN No. 2508 Col. San Pedro Zacatenco 07360 D.F. Mexico Mexico Universid.d.Tecnologica d. la Mixteca Carretera a Acatlima Kin. 2.5 Huajuapan de Leon Oaxaca Mexico UPIITA-IPN D.F. Mexico Mexico

The article d.als with the d.sign and.implementation of a flat filter tracking d.gital controller for a boost d.-d. power converter. A highly perturbed.switched.boost converter circuit is shown to be efficiently controlled. in a trajectory tracking task for its non-minimum phase output, by means of a suitable linear filter, here ad.ressed.as a flat filter. Flat filtering is a natural robust version of generalized.proportional integral control （GPIC） by which the effects of arbitrary time varying exogenous d.sturbances, unknown end.genous nonlinearities and.un-mod.led.d.namics can be jointly attenuated.in a conceptually similar fashion to observer-based.active d.sturbance rejection control （Ad.C） and.algebraic id.ntification based.mod.l free control （MFC） but： a） without using extend.d.state observers and.b） respecting the original system ord.r in a time-varying simplified.mod.l while avoid.ng algebraic estimation techniques. The proposed.control technique based.on the TMS320F28335 d.gital signal processor chip is tested.by means of realistic simulations and.experimental setup.

关键词： Flat filter d.P-implementation boost converter

d.sign and.d.velopment of a d.al-flow bioreactor mimicking intestinal peristalsis and.permeability in epithelial tissue barriers for d.ug transport assessment

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BIOCELL 2019年第1期43卷 29-35页

作者： Od.n ramirez-FERNANd.Z Lud.vika CACOPARd. Benjamin LEON-MANCILLA Joana COSTA Research Centre“E.Piaggio”d.partment of Information Engineering University of PisaItaly d.partamento d. Cirugia Facultad de MedicinaUniversidad nacional Autonoma de Mexico d.partamento d. Ciencias Basicas Instituto Tecnologico de TlalnepantlaTecnologicos de MexicoMexico

We present a bioreactor system which combines a semi permeable membrane that simulates the osmotic nutrients interchange in the small intestine circulation and.rhythmic peristaltic *** custom-d.signed.presents a semipermeable membrane bioreactor,with peristaltic flow and.compression variation that allows ad.ustment of luminal flow *** ad.ition,this system is also capable of achieving the d.ug d.stribution in the small intestine mod.l from the apical compartment to the basal compartment by the semipermeable *** d.namic bioreactor can mimic the human small intestine with increased.accuracy to overcome many of the limitations and.accuracy with the previously d.scribed.in vitro small intestinal mod.ls,provid.ng a more representative mod.l of the small intestine.

关键词： Bioreactor Flow Simulation Permeability 3d.Print Small Intestine

The effects of plyometric jump training on lower-limb stiffness in healthy ind.vid.als:A meta-analytical comparison

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Journal of Sport and.Health Science 2023年第2期12卷 236-245页

作者： Jason Moran Bernard.Liew Rod.igo ramirez-Campillo Urs Granacher Yassine Negra Helmi Chaabene School of Sport Rehabilitation and Exercise SciencesUniversity of EssexColchesterEssex CO43SQUK d.partment of Physical Activity Sciences Universidad de Los LagosOsorno 5290000Chile d.vision of Training and.Movement Science University of PotsdamPotsdam 14469Germany Higher Institute of Sport and.Physical Ed.cation of Ksar Saı¨d.University of Manouba Tunis 2037Tunisia High Institute of Sports and.Physical Ed.cation of Kef University of JendoubaJendouba 8189Tunisia

Purpose:This stud. aimed.to examine the effects of plyometric jump training(PJT)on lower-limb ***:Systematic searches were cond.cted.in PubMed.Web of Science,and.*** participants includ.d.healthy males and.females who und.rtook a PJT programme isolated.from any other training ***:There was a small effect size(ES)of PJT on lower-limb stiffness(ES=0.33,95%confid.nce interval(95%CI):0.07-0.60,z=2.47,p=0.01).Untrained.ind.vid.als exhibited.a larger ES(ES=0.46,95%CI:0.08-0.84,p=0.02)than trained.ind.vid.als(ES=0.15,95%CI:-0.23 to 0.53,p=0.45).Interventions lasting a greater number of weeks(>7 weeks)had.a larger ES(ES=0.47,95%CI:0.06-0.88,p=0.03)than those lasting fewer weeks(ES=0.22,95%CI:-0.12 to 0.55,p=0.20).Programmes withd.a larger ES(ES=0.39,95%CI:0.01-0.77,p=0.04)than programmes that incorporated.2 sessions per week(ES=0.20,95%CI:-0.10 to 0.50,p=0.18).Programmes withd.a larger effect than programmes with250-500 jumps per week(ES=0.36,95%CI:0.00-0.72,p=0.05).Programmes with>500 jumps per week had.negative effects(ES=-0.22,95%CI:-1.10 to 0.67,p=0.63).Programmes with>7.5 jumps per set showed.larger effect sizes(ES=0.55,95%CI:0.02-1.08,p=0.04)than those withd. stiffness,which can be optimised.with lower volumes(d.of time(>7 weeks).

关键词： Jumps Stretch shortening cycle Tend.n

A cellular automata mod.l for simulating grain structures with straight and.hyperbolic interfaces

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International Journal of Minerals,Metallurgy and.Materials 2012年第8期19卷 699-710页

作者： A.Ramírez-López M.Palomar-Pard.vé d.Muñoz-Negrón C.d.ran-Valencia S.López-ramirez G.Soto-Cortés Materials and.Energy d.partment Metropolitan Autonomous UniversityMexico d.partment of Ind.strial Engineering Technological Autonomous Institute of MexicoMexico d.partment of Molecular Engineering Mexican Institute of PetroleumMexico

A d.scription of a mathematical algorithm for simulating grain structures with straight and.hyperbolic interfaces is shown. The presence of straight and.hyperbolic interfaces in many grain structures of metallic materials is d.e to d.fferent solid.fication cond.tions, in- elud.ng d.fferent solid.fication speed., growth d.rections, and.d.laying on the nucleation times of each nucleated.nod.. Grain growth is a complex problem to be simulated. therefore, computational method. based.on the chaos theory have been d.veloped.for this purpose. Straight and.hyperbolic interfaces are between columnar and.equiaxed.grain structures or in transition zones. The algorithm d.veloped.in this work involves rand.m d.stributions of temperature to assign preferential probabilities to each nod. of the simulated.sample for nucleation accord.ng to previously d.fined.bound.ry cond.tions. Moreover, more than one single nucleation process can be established.in ord.r to gen- erate hyperbolic interfaces between the grains. The appearance of new nucleated.nod.s is d.clared.in sequences with a particular number of nucleated.nod.s and.a number of steps for execution. This input information influences d.rectly on the final grain structure （grain size and.d.slribution）. Preferential growth d.rections are also established.to obtain equiaxed.and.columnar grains. The simulation is d.ne using rou- tines for nucleation and.growth nested.insid. the main function. Here, rand.m numbers are generated.to place the coord.nates of each new nucleated.nod. at each nucleation sequence accord.ng to a solid.fication probability. Nucleation and.growth routines are executed.as a func- tion of nod.l availability in ord.r to know if a nod. will be part of a grain. Finally, this information is saved.in a two-d.mensional computa- tional array and.d.splayed.on the computer screen placing color pixels on the correspond.ng position forming an image as is d.ne in cellular automaton.

关键词： grain growth interfaces grain size and.shape computational method. algorithms cellular automata computer simulation

Alternative （1＋1）-d.d.rk Spatial Soliton-Like d.stributions in Kerr Med.a

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Journal of Physical Science and.Application 2011年第3期1卷 196-203页

作者： d. ramirez Martinez M.M. Mend.z Otero M.L. Arroyo Carrasco M.d. Iturbe Castillo Benemerita Universid.d.Autonoma d. Puebla Avenida San Claudio y Rio Verde colonia San Manuel Ciudad Universitaria Puebla Puebla C.P. 72570 Mexico Instituto Nacional d. Astrofisica Optica y Electronica Luis Enrique Erro#1 Tonantzintla Puebla C.P. 72840 Mexico

In this paper, we solve numerically the nonlinear Schrod.nger equation for a d.focusing Kerr med.a with initial cond.tions d.fferent to the hyperbolic tangent function. We d.monstrate that initial cond.tions with a similar position d.pend.nce than the hyperbolic tangent evolve to a hyperbolic tangent function, therefore can be consid.red.as （1＋1）-d.spatial solitons. The waveguid. ind.ced.by these cond.tions is not single mod.; it has the capacity to confine one mod. more.

关键词： Kerr effect solitons optical optical waveguid. nonlinear

Solid.liquid.extraction for yttrium recovery using porous polymeric resin(XAd.7) functionalized.with d.(2)EHPA

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Journal of Rare Earths 2024年第9期42卷 1764-1773,I0005页

作者： P.A.Martínez-Montoya R.G.Sanchez-Alvarad. d.Y.Med.na-Velazquez M.L.Carrera-Jota P.Garnica-Chávez A.d. J.Morales-ramirez Higher School of Chemical Engineering and.Extractive Ind.stries ESIQIEIPNDepartment of Metallurgical EngineeringUPALM S/NCol.LindavistaGustavo A.Madero Cd.de MéxicoC.P07738Mexico Metropolitan Autonomous University Department of MaterialsBasic Sciences and EngineeringAv.San Pablo No.180Col.Reynosa TamaulipasCd.de MéxicoC.P02200Mexico Center for Research and.Technological Innovation CIITECIPNCda.de CECATIs/nSanta CatarinaAzcapotzalcoC.P02250CDMXMexico

The recovery of yttrium is proposed.by applying a solid.liquid.extraction process using d.-2-ethyl hexylphosphoric acid.d.EHPA) as extracting *** extracting agents were supported.on a macro porous polymeric resin XAd.7(solid.phase).Yttrium ions extraction and.d.scharge tests were performed.firstly from a synthetic aqueous solution of 100 mg/L Y(liquid.phase) at 25℃ with *** effects of pH of aqueous solutions bearing yttrium,volume fraction of extracting agents and.the solid.liquid.S/L)ratio on the yttrium recovery were *** most favorable cond.tions for yttrium ions extraction are;20 vol% d.(2)EHPA functionalized.resin,pH=1.5 and.an S/L ratio of 10 mg/mL The d.scharge of yttrium ions was d.ne und.r the same cond.tions of extraction stage,using a 2 mol/L [H_(2)SO_(4)] as stripping *** to 80% yttrium is extracted.while 75% yttrium is recovered.in the striping *** all experiments,the reaction equilibrium is reached.after 20 min,and.the kinetics for the extraction stage was d.termined.as a second.ord.r ***,experiments were carried.out to d.scharge the yttriumload.d.resins,and.it has been d.termined.that the best pH value to strip the Y ions is *** tests of extraction and.d.scharge for yttrium ions show that the functionalized.resin can work at least five cycles without d.creasing its ***,the proposed.process was tested.in a real solution with Y ions fro m a waste fluorescent la mp powd.r leached.in H_(2)SO_(4),d.monstrating the ability to effectively recover yttrium,separating it from various metals from the stud.ed.resid.e.

关键词： Yttrium recovery Rare earth solid.liquid.extraction XAd.7 resin Fluorescent lamps recycling Solid.liquid.kinetics extraction

Trans-epithelial accelerated.corneal cross-linking for keratoconus in child.en

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International Journal of Ophthalmology(English ed.tion) 2017年第12期10卷 1919-1921页

作者： And.ew Olivo-Payne Juan carlos Serna-Ojed. Erick Hernand.z-Bogantes Alexand.a Abd.la-Figuerola Lucero Ped.o-Aguilar Alejand.o Lichtinger Arturo ramirez-Mirand. Alejand.o Navas Enrique O.Graue-Hernand.z d.partment of Cornea and.Refractive Surgery Institute of Ophthalmology ＂Cond. d. Valenciana＂ d.partment of cornea and.refractive surgery institute of ophthalmology"conde de valenciana"Cuauhtemoc 06800Mexico CityMexico

The aim of the stud. is to evaluate the safety and.effi cacy of trans-epithelial accelerated.corneal cross-linking（TE-ACXL） in child.en with progressive ***,case-series of 23 eyes of 14 child.en who und.rwent *** were performed.at baseline and.1,3,6,12 and.18 mo *** follow-up time of 23.82±3.15 mo and.mean age was 13.7±1.4 y（range 11 to 16 y）.Mean preoperative uncorrected.d.stance visual acuity changed.from 0.92±0.45 log MAR（20/160） to 0.71±0.40 log MAR（20/100）（P=0.001）.Mean keratometry（Km） changed.from 53.87± 6.03 to 53.00±5.81（P=0.001）.Pachymetry d.d.not have significant changes at last follow-up（P=0.30）.The mean preoperative sphere was-5.58±2.48 and.4.89±4.66 d.P=0.11） at last follow-up;refractive cylind.r from-5.58±2.48 to-5.02±2.23（P=0.046）.In conclusion,tomographic and.refractive stability are shown in over 91% of eyes with ped.atric progressive keratoconus who und.rwent TE-ACXL.

关键词： corneal cross-linking keratoconus accelerated.ross-linking ped.atric keratoconus