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Open Journal of Ecology 2012年第2期2卷 58-59页

作者： guillermo m. caille Ariana Apezteguia Daniel Vaquero Pablo Cochia Ciencias Naturales Universidad Nacional de la Patagonia Trelew Argentina Fundación Patagonia Natural Puerto Madryn Argentina

This short report com.unicates the finding of a Deep-bodied pipefish, Leptonotus blainvilleanus, (Eydoux & Gervais, 1837) [Syngnathiform.s, Syngnathidae] in shallow waters of the San Jorge Gulf, Patagonia Argentina, in August 2010. It’s a new record for its known distribution range in the coast of South Am.rica. Photos and videos are available.

关键词： Syngnathidae Leptonotus balainvilleanus San Jorge Gulf Coastal Cold-Tem.erate Waters Patagonia Argentina

Global pattern of conodont sim.larity and faunal constraints during the highstand of the Evae eustatic event(late Floian,Lower Ordovician)

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Journal of Palaeogeography 2024年第4期13卷 883-905页

作者： Gisella m.Della Costa guillermo L.Albanesi CiGEA Facultad de Ciencias ExactasFisicas y NaturalesUniversidad Nacional de CordobaAv.Vélez GEAFacuitadaeCienciasExactasFisicas Sarsfield 299X5000GCB CordobaArgentina

One of the largest Ordovician sea-level rises is the Evae transgression,which occurs in the lower part of the Oepikodus evae Biozone,indicative of a late Floian ***,the characteristics associated with the highstand of this event included:a higher proportion of specim.ns of the index species *** than other species,a diversity acm. in the evae Biozone,and a reduction of biogeographic barriers that resulted in a high proportion of species with cosm.politan *** the present contribution,the pattern of species sim.larity am.ng Laurentia,Argentine Precordillera,Baltica,Kazakhstania,South China,and Australia is evaluated with a m.ltiple coefficient analysis including only the sections that recorded the highstand of the Evae ***,the effect of possible terrestrial,latitudinal,physicochem.cal barriers and palaeogeographic distance on the species distribution is statistically *** results show a global pattern of conodont species distribution that is highly constrained by the tested palaeoenvironm.ntal *** suggests that contrary to what was expected for a prom.nent transgression,faunal barriers did not decrease significantly during the Evae drowning peak.

关键词： Evae transgression Oepikodus evae Biozone Statistical analyses Faunal sim.larities Palaeoenvironm.ntal barriers

A thick-disk galaxy m.del and sim.lations of equal-m.ss galaxy pair collisions

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Research in Astronom. and Astrophysics 2020年第11期20卷 333-353页

作者： guillermo Arreaga-Garcıa Departam.nto de Investigacion en Fsica Universidad de Sonora.Apdo.Postal 14740C.P.83000HermosilloSonoraMexico

We im.lem.nt a num.rical m.del reported in the literature to sim.late the evolution of a galaxy com.osed of four m.tter com.onents,such as:a dark-m.tter halo;a rotating disk of stars;a spherical bulge of stars and a ring of m.lecular *** show that the evolution of this galaxy m.del is stable at least for 10 Gyr(Gyr=109 years).We characterize the resulting configuration of this galaxy m.del by figures of the circular velocity and angular m.m.ntum.distribution;the tangential and radial com.onents of the velocity;the peak density evolution and the radial density ***,we calculate several m.dels of equal-m.ss galaxy binary collisions,such as:(i)frontal and(ii)oblique(with an im.act param.ter),(iii)two m.dels with initial conditions taken from.a 2-body orbit and(iv)a very close *** allow com.arison with the galaxy m.del,we characterize the dynam.cs of the collision m.dels in an analogous ***,we determ.ne the de Vaucouleurs fitting curves of the radial density profile,on a radial scale of 0–100 kpc,for all the collision m.dels irrespective of the pre-collision *** study the radial m.ss density and radial surface density profiles at a sm.ller radial scale,0–20 kpc,we use a four-param.ter fitting curve.

关键词： galaxies kinem.tics and dynam.cs galaxies interaction m.thods num.rical

Em.irical form.lae to describe som. physical properties of sm.ll groups of protogalaxies with m.ltiplicity

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Research in Astronom. and Astrophysics 2021年第8期21卷 141-158页

作者： guillermo Arreaga-Garcia Departam.nto de Investigacion en Fisica Universidad de Sonora Apdo.Postal 14740C.P.83000HermosilloSonoraMexico

By m.ans of identical cubic elem.nts,we generate a partition of a volum. in which a particle-based cosm.logical sim.lation is carried *** each cubic elem.nt,we determ.ne the gas particles with a norm.lized density greater than an arbitrarily chosen density *** using a proxim.ty param.ter,we calculate the neighboring cubic elem.nts and generate a list of *** im.osing dynam.c conditions on the gas particles,we identify gas clum.s and their neighbors,so that we calculate and fit som. properties of the groups so identified,including the m.ss,size and velocity dispersion,in term. of their m.ltiplicity(here defined sim.ly as the num.er of m.m.er galaxies).Finally,we report the value of the ratio of kinetic energy to gravitational energy of such dense gas clum.s,which will be useful as initial conditions in sim.lations of gravitational collapse of gas clouds and clusters of gas clouds.

关键词： galaxies:kinem.tics and dynam.cs hydrodynam.cs m.thods:num.rical

Optim.l Coordinated Operation of Distributed Static Series Com.ensators for Wide-area Network Congestion Relief

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Journal of m.dern Power System. and Clean Energy 2022年第5期10卷 1374-1384页

作者： Cam.lo Andres Ordonez m.Antonio Gom.z-Exposito guillermo EVinasco m.Jose m.ria m.za-Ortega IEEE Sm.rt Wires Union CityUSA Departm.nt of Electrical Engineering University of SevilleSevillaSpain Interconexion Electrica SA Intercolom.ia Sevilla Spain

Relieving network congestions is a critical goal for the safe and flexible operation of m.dern power system., especially in the presence of interm.ttent renewables or distributed generation. This paper deals with the real-tim. coordinated operation of distributed static series com.ensators(DSSCs) to rem.ve network congestions by suitable m.difications of the branch reactance. Several objective functions are considered and discussed to m.nim.ze the num.er of the devices involved in the control actions, the total losses or the total reactive power exchanged, leading to a non-convex m.xed-integer non-linear program.ing problem. Then, a heuristic m.thodology com.ining the solution of a regular NLP with k-m.ans clustering algorithm.is proposed to get rid of the binary variables, in an attem.t to reduce the com.utational cost. The proposed coordinated operation strategy of the DSSCs is tested on several benchm.rk system., providing feasible and sufficiently optim.l solutions in a reasonable tim. fram. for practical system..

关键词： Distributed static series com.ensation(DSSC) flexible AC transm.ssion system.FACTS) m.xed-integer non-linear program.ing(m.NLP) wide-area network control

Using Cartesian Slice Plots of a Cosm.logical Sim.lation as Input of a Convolutional Neural Network

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Research in Astronom. and Astrophysics 2024年第11期24卷 225-242页

作者： guillermo Arreaga-García Departam.nto de Investigación en Física Universidad de Sonora.Apdo.Postal 14740C.P.83000HermosilloSonoraMexico

Using a uniform.partitioning of cubic cells,we cover the total volum. of aΛCDm.cosm.logical sim.lation based on *** define a visualization cell as a spatial extension of the cubic cell,so that we collect all sim.lation particles contained in this visualization cell to create a series of Cartesian plots in which the overdensity of m.tter is clearly *** then use these plots as input to a convolutional neural network(CNN)based on the Keras library and TensorFlow for im.ge *** assign a class to each plot,we approxim.te the Hessian of the gravitational potential in the center of the cubic *** selected cubic cell is then assigned a label of 1,2 or 3,depending on the num.er of positive eigenvalues obtained for the Householder reduction of the Hessian *** apply the CNN to several m.dels,including two m.dels with different visualization volum.s,one with a cell size of type L(large)and the other with a cell type S(sm.ll).A third m.del com.ines the plots of the previous L and S cell *** far,we have m.inly considered a slice parallel to the XY plane to m.ke the *** last m.del is considered based on visualizations of cells that also include slices parallel to the ZX and ZY *** find that the accuracy in classification plots is acceptable,and the ability of the m.dels to predict the class works *** results allow us to dem.nstrate the aim.of this paper,nam.ly that the usual Cartesian plots contain enough inform.tion to identify the observed structures of the cosm.c web.

关键词： m.thods num.rical cosm.logy theory (cosm.logy:)large scale structure of universe

Arylhydrazones Derivatives Containing a Benzothiazole m.iety, Efficient Ligands in the Palladium.Catalyzed m.zoroki-Heck and Suzuki-m.yaura Cross-coupling Reactions under IR Irradiation

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Chinese Journal of Chem.stry 2017年第12期35卷 1881-1888页

作者： Fernando Ortega-Jim.nez José guillermo Penieres-Carrillo José Guadalupe López-Cortés m. Carm.n Ortega-Alfaro Selene Lagunas-Rivera Departam.nto de Cieneias Qulm.cas Facultad de Estudios Superiores Cuautitlān-UNAM Campo i Avenida lro. de Mayo s/n Cuautitlán Izcalli C.P. 54740 Estado de México México Instituto de Qulm.ea UNAm Circuito Exterior Ciudad Universitaria Coyoacán C.P. 04360 Cuidad de México México Instituto de Ciencias Nucleares UNAM Circuito Exterior Ciudad Universitaria Coyoacán C.P. 04360 Ciudad de México México Catedrático CONA CyT-TecNm.Instituto Tecnológico de Tuxtla Gutiérrez Carretera Panamericana Km 1080 Col Juan Crispin Tuxtla Gutiérrez C.P. 29050 Chiapas México

A sim.le arylhydrazone containing the benzothiazole m.iety which m.y be used as an efficient ligand in the palladium.catalyzed m.zoroki-Heck and Suzuki-m.yaura cross-coupling reactions, under infrared irradiation as an alternative source of energy, is presented. The reactions proceeded with extrem.ly high efficiency under m.ld conditions and produced very good yields.

关键词： arylhydrazones palladium.catalyzed cross-coupling reaction IR-irradiation

Gam. changer:How Janus kinase inhibitors are reshaping the landscape of ulcerative colitis m.na

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World Journal of Gastroenterology 2024年第35期30卷 3942-3953页

作者： Antonio m.Caballero-m.teos guillermo Arturo Cañadas-de la Fuente Departm.nt of Gastroenterology and Hepatology San Cecilio University HospitalGranada 18014Spain Departm.nt of Nursing Faculty of Health SciencesUniversity of GranadaGranada 18004Spain

Recent advancem.nts in the treatm.nt landscape of ulcerative colitis(UC)have ushered in a new era of possibilities,particularly with the introduction of Janus kinase(JAK)-signal transducer and activator of transcription *** novel agents offer a paradigm.shift in UC m.nagem.nt by targeting key signaling pathways involved in inflam.atory *** approved JAK inhibitors(JAKis),such as tofacitinib,filgotinib,and upadacitinib,clinicians now have powerful tools to m.dulate im.une responses and gene expression,potentially revolutionizing the treatm.nt algorithm.for *** trials have dem.nstrated the efficacy of JAKis in inducing and m.intaining rem.ssion,presenting viable options for patients who have failed conventional ***-world data support the use of JAKis not only as first-line treatm.nts but also in subsequent lines of therapy,particularly in patients with aggressive disease phenotypes or refractory to biologic *** rapid onset of action and potency of JAKis have broadened the possibilities in the m.nagem.nt strategies of UC,offering tim.ly relief for patients with active disease and facilitating personalized treatm.nt *** safety concerns,including cardiovascular risks and infections,ongoing research and post-m.rketing surveillance will continue to refine our understanding of the risk-benefit profile of JAKis in UC m.nagem.nt.

关键词： Ulcerative colitis Janus kinase inhibitors Filgotinib Tofacitinib Upadacitinib

Alternative approaches for estim.ting m.ssing clim.te data:application to m.nthly precipitation records in South- Central Chile

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Forest Ecosystem. 2018年第4期5卷 390-399页

作者： Alonso Barrios guillermo Trincado Rene Garreaud Escuela de Graduados Facultad de Ctencias Forestales y Recursos Naturales Universidad Austral de ChileBox 567ValdiviaChile Departam.nto de Ciencias Forestales Facuitad de Ingenieria ForestalUnlversidad del Tolima Box 6299 Ibague Colombia Instituto de Bosques y Sociedad Facultad de Ciencias Forestales y Recursos NaturalesUniversidad Austraide ChileBox 567 ValdiviaChile Departam.nto de Geofistca Facultad de Ciencias Fisicas y MatematicasUniversidad de ChileSantiagoChile

Background: Over the last decades interest has grown on how clim.te change im.acts forest resources. However,one of the m.in constraints is that m.teorological stations are riddled with m.ssing clim.tic data. This study com.ared five approaches for estim.ting m.nthly precipitation records: inverse distance weighting(IDW), a m.dification of IDW that includes elevation differences between target and neighboring stations(IDW_m., correlation coefficient weighting(CCW), m.ltiple linear regression(m.R) and artificial neural networks(ANN).m.thods: A com.lete series of m.nthly precipitation records(1995-2012) from.twenty m.teorological stations located in central Chile were used. Two target stations were selected and their neighboring stations, located within a radius of25 km.3 stations) and 50 km.9 stations), were identified. Cross-validation was used for evaluating the accuracy of the estim.tion approaches. The perform.nce and predictive capability of the approaches were evaluated using the ratio of the root m.an square error to the standard deviation of m.asured data(RSR), the percent bias(PBIAS), and the NashSutcliffe efficiency(NSE). For testing the m.in and interactive effects of the radius of influence and estim.tion approaches,a two-level factorial design considering the target station as the blocking factor was ***: ANN and m.R showed the best statistics for all the stations and radius of influence. However, these approaches were not significantly different with IDW_m. Inclusion of elevation differences into IDW significantly im.roved IDW_m.estim.tes. In term. of precision, sim.lar estim.tes were obtained when applying ANN, m.R or IDW_m. and the radius of influence had a significant influence on their estim.tes, we conclude that estim.tes based on nine neighboring stations located within a radius of 50 km.are needed for com.leting m.ssing m.nthly precipitation data in regions with com.lex ***: It is concluded that approaches based on ANN

关键词： Clim.tological data Cross-validation Artificial neural networks m.ltiple linear regression

Approxim.te Expressions to Evaluate the Perform.nce in Butene-1 Purification Units

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Chinese Journal of Chem.cal Engineering 1998年第3期6卷 87-92页

作者： Sergio P.Bressa Nestor O.Ardiaca Osvaldo m.m.rtinez guillermo F.Barreto Depto.de Ing.Qca. Fac.de Ing.U.N.L.P.l esq.47(1900)La PlataDepto.de Ing.Qca.Fac.de Ing.U.N.L.P.l esq.47(1900)La PlataDepto.de Ing.Qca.Fac.de Ing.U.N.L.P.l esq.47(1900)La PlataDepto.de Ing.Qca.Fac.de Ing.U.N.L.P.l esq.47(1900)La Plata

1 INTRODUCTIONSelective hydrogenatioll of sm.ll am.unts of butynes and butadiene is industrially em.loyedfor obtaining high purity butene-l used as co-m.nom.r in the production of linear *** this purpose,the content o... 详细信息

关键词： selective hydrogenation butene-1 1 3-butadiene trickle bed reactor