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A novel simple procedure to consider seismic soil structure interaction effects in 2D models

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Earthquake Engineering and Engineering Vibration 2014年第3期13卷 535-543页

作者： Juan Diego Jaramillo Juan David gómez Doriam Restrepo Santiago Rivera Universidad EAFIT Medellín Colombia INTEgRAL S.A Medellín Colombia

A method is proposed to estimate the seismic soil-structure-interaction （SSI） effects for use in engineering practice. It is applicable to 2D structures subjected to vertically incident shear waves supported by homogenous half-spaces. The method is attractive since it keeps the simplicity of the spectral approach, overcomes some of the difficulties and inaccuracies of existing classical techniques and yet it considers a physically consistent excitation. This level of simplicity is achieved through a response spectra modification factor that can be applied to the free-field 5%-damped response spectra to yield design spectral ordinates that take into account the scattered motions introduced by the interaction effects. The modification factor is representative of the Transfer Function （TF） between the structural relative displacements and the free- field motion, which is described in terms of its maximum amplitude and associated frequency. expressions to compute the modification factor by practicing engineers are proposed based upon a parametric study using 576 cases representative of actual structures. The method is tested in 10 cases spanning a wide ra.ge of common fundamental vibration periods.

关键词： seismic soil structure interaction simplified procedures modified response spectra

Projective Hilbert modules and sequential approximations

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Science China Mathematics 2025年第1期 137-168页

作者： Lawrence g.Brown Huaxin Lin Department of Mathematics Purdue University Department of Mathematics East China Normal University Department of Mathematics University of Oregon Sha.ghai Institute for Mathematics and Interdisciplinary Sciences

We show that when A is a separable C*-a.gebra,every countably generated Hilbert A-module is projective（with bounded module maps as morphisms）.We also study the approximate extensions of bounded module *** the case where A is a σ-unital simple C*-a.gebra with strict comparison,and every strictly positive lower semicontinuous affine function on quasitraces can be realized as the rank of an element in the Cuntz semigroup,we show that the Cuntz semigroup is equivalent to unitarily equivalent classes of countably generated Hilbert A-modules if and only if A has stable rank one.

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On the Set of grouplikes of a Coring

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Acta Mathematica Sinica,English Series 2012年第1期28卷 195-204页

作者： L.EL KAOUTIT J.gómez-TORRECILLAS Departamento de lgebra.Facultad de Educación y Humanidades Universidad de GranadaEl Greco No 10E-51002 CeutaEspaa Departamento de lgebra.Facultad de Ciencias Universidad de GranadaE18071 GranadaEspaa

We focus our attention to the set gr（ξ） of grouplike elements of a coring ξover a ring A. We do some observations on the actions of the groups U（A） and Aut（ξ~） of units of A and of automorphisms of corings of ξ, respectively, on gr（ξ）, and on the subset gal（ξ）of all galois grouplike elements. Among them, we give conditions on ξ under which gal（ξ） is a.group, in such a way that there is an exact sequence of groups a.g → U（Ag） → U（A） → gal（ξ） → a.g, where Ag is the suba.gebra of coinvaxiants for some g ∈ gal（ξ）.

关键词： galois corings division ring extensions non-abelian cohomology

A stable anthraquinone-derivative cathode to develop sodium metal batteries: The role of ammoniates as electrolytes

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Journal of Energy Chemistry 2023年第2期77卷 572-580,I0015页

作者： Débora Ruiz-Martínez José M.Orts Roberto gómez Departament de Química Física i Institut Universitari d’Electroquímica Universitat d’AlacantApartat 99Alicante E-03080Spain

Recha.geable sodium metal batteries constitute a cost-effective option for energy storage although sodium shows some drawbacks in terms of reactivity with organic solvents and dendritic *** we demonstrate that an organic dye,indanthrone blue,behaves as an efficient cathode material for the development of secondary sodium metal batteries when combined with novel inorganic *** electrolytes are ammonia solvates,known as liquid ammoniates,which can be formulated as NaI·3.3NH_(3) and NaBF_(4)·2.5NH_(3).They impart excellent stability to sodium metal,and they favor sodium non-dendritic growth linked to their exceedingly high sodium ion *** advantage is complemented by a high specific *** battery described here can last hundreds of cycles at 10 C while keeping a Coulombic efficiency of 99%from the first *** of the high capacity of the cathode and the superior physicochemical properties of the electrolytes,the battery can reach a specific energy value as high as 210 W h kgIB^(-1),and a high specific power of 2.2 kW kgIB^(-1),even at below room temperature(4℃).Importantly,the battery is based on abundant and cost-effective materials,bearing promise for its application in la.ge-scale energy storage.

关键词： Sodium metal batteries Anthraquinone-based cathode Vat dye Indanthrone blue Inorganic electrolytes Liquid ammoniates

Ta.geting epidermal growth factor receptor signaling to facilitate cortical injury repair?

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Neural Regeneration Research 2024年第5期19卷 935-936页

作者： Ricardo gómez-Oliva Pedro Nunez-Abades Carmen Castro Área de Fisiología Facultad de Medicina Universidad de CádizCadizSpain Instituto de Investigación e Innovación en Biomedicina de Cádiz CadizSpain Departamento de Fisiología Facultad de FarmaciaUniversidad de SevillaSevilleSpain

The existence of neural stem cells(NSC)in specific areas of the adult mammalian brain leads to the generation of new neurons involved in homeostatic *** is the case of the NSC of the subventricular zone(SVZ)that produces olfactory bulb(OB)*** neurons integrate into circuits to modulate sensory information and participate in olfactory processing(Bragado Alonso et al.,2019).A series of hierarchical events need to take place to produce OB neurons from NSC of the ***,the activation of quiescent NSC is necessary to produce intermediate transit amplifying progenitors(TAP),which will generate *** latter are cells that maintain a proliferative phenotype while in an immature ***,once they initiate migration toward the OB,they progressively undergo their differentiation into neurons(Kjell et al.,2020).

关键词： ventricular maintain

Electrochemical synthesis and the functionalization of few layer graphene in ionic liquid and redox ionic liquid

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Science China Chemistry 2018年第5期61卷 598-603页

作者： Maria.gómez-Mingot Amarnath Chellachamy Anbalagan Hyacinthe Randriamahazaka Jalal ghilane Universite Paris Diderot Sorbonne Paris Cite ITODYS UMR 7086 CNRS SIELE group Paris 75013 France Laboratoire de Chimie des Processus Biologiques UMR 8229 CNRS University Pierre et Marie Curie College de France Paris 75231 France Chemistry Division Bhabha Atomic Research Centre Trombay Mumbai 400085 India

Electrochemical reductive exfoliation of graphite to few layered graphene(FLg) in presence of 1-ethyl-2,3-dimethyl imidazolium bis(trifluoromethylsulfonyl) imide ionic liquid and redox ionic liquid based ferrocene has been investigated. Thus, by applying a mild negative potential(-2.7 V vs. Fc/Fc^+) to carbon electrode in ionic liquid graphene flakes could be generated. The generated materials have been characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, high resolution transmission electron microscopy and atomic force microscopy. XPS and Raman analysis show that the electrochemical reductive exfoliation provides the formation of FLg. The thickness of the resulting FLg was found to be ra.ged between 4 and1 nm. HR-TEM images reveal the formation of few graphene layers and in some cases single graphene layer was ***, this electrochemical route conduces to the formation of ionic liquid functionalized FLg. Finally, the reductive exfoliation was further investigated in the presence of redox ionic liquid. XPS and electrochemical measurements confirm the presence of ferrocene.

关键词： electrochemistry reductive exfoliation ionic liquid graphene

Litter buffet:On the use of trash bins by birds in six boreal urban settlements

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Avian Research 2023年第2期14卷 182-190页

作者： Michelle garcía-Arroyo Miguel a.gomez-Martínez Ian Ma.gregor-Fors Ecosystems and Environment Research Programme Faculty of Biological and Environmental SciencesUniversity of HelsinkiNiemenkatu 73Lahti15140Finland Instituto de Biotecnología y Ecología Aplicada(INBIOTECA) Universidad VeracruzanaXalapa91090Mexico

Unintentional food resources in urban areas(street litter,food leftovers,overflowing trash bins)are dietary components of some urban-exploiter bird *** this study,we report on 13 bird species in six southern Finnish cities using urban trash bins and describe differences in their activity when provided with food resources(i.e.,bait)in different bin *** used generalized linear models(gLM)and classification and regression trees(CART)to test for associations between environmental variables and bird activity at the *** activity at the binscapes significantly differed among all cities and among types of bins and was significantly higher after placing bait in all *** with the la.gest opening had more activity as opposed to those with smaller openings or *** and gulls had the highest activity,with corvids usually being present before the bait was placed and gulls increasing their activity *** differences show that trash bin foraging is highly malleable and thus susceptible to management preventing its *** waste management measures could aid in reducing the number of species close to bins and their surroundings,benefiting both bird and human health.

关键词： Avian Behavior Binscape Food resources Urban ecology

BANCO DE BILBAO HEADQUARTERS:FIRST LOW-ENERgY BUILDINg IN SPAIN?

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Journal of green Building 2011年第4期6卷 37-44页

作者： César Martín gómez School of Architecture Installations and Energy Section

Francisco Javier Sáenz de Oíza was perhaps the greatest architect of the twentieth century in Spain,and his masterpiece was the Banco de Bilbao Headquarters,located in the Paseo de la Castellana in Madrid(Spain).Sáenz de Oíza was a university professor in the Installations and Energy Areas at the University of *** him,concepts such as indoor comfort,lighting,heat production,cooling,and solar houses were an indispensable part of the student’s learning and,of course,he included them in his building *** applied these concepts in the Banco de Bilbao ***,the purpose of this paper will be to examine the Banco de Bilbao technical knowledge in depth-including its passive architectonical design-and to present the main good decisions(and mistakes)of this first low-energy Spanish building after almost 30 years of intensive use,to extend its lessons for future buildings.

关键词： office building design techniques Sáenz de Oíza façade radiation skyscraper

THE PASSIVHAUS STANDARD IN THE MEDITERRANEAN CLIMATE:EVALUATION,COMPARISON AND PROFITABILITY

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Journal of green Building 2015年第4期10卷 55-72页

作者： Saldaña-Márquez gómez-Soberón Arredondo-Rea Almaral-Sánchez gómez-Soberón Rosell-Balada Universitat Politècnica de Catalunya Escola Tècnica Superior d’Arquitectura de BarcelonaDepartament de Construccions ArquitectòniquesⅠDepartament d’Estructures a l’ArquitecturaBarcelonaSpain Universitat Politècnica de Catalunya Escola Politècnica Superior d’Edificacióde BarcelonaDepartament de Construccions ArquitectòniquesⅡBarcelonaSpain Universidad Autónoma de Sinaloa Facultad de Ingeniería MochisLos MochisMexico Universidad Autónoma Metropolitana Escuela de Ingeniería CivilDepartamento de MaterialesMexico D.F.Mexico

INTRODUCTION One of the main environmental problems faced by the global community in the twenty-first century is unquestionably the reduction of greenhouse gas emissions(Fuller and Crawford 2011).To face this challenge,the European Union(EU)has set the so-called 2020 Horizon as one of its main objectives:limiting the emission of greenhouse gas emissions by 20%,satisfying 20%of all energy needs through renewable sources,and improving energy efficiency by 20%(The Euro-pean Union 2012).The last projection forecast in 2012 by the European Envi-ronmental Agency(EEA)established that Spain was one of the countries in the EU furthest from reaching these objectives(The European Union 2013).As a result,implementing measures devised to meet the 2020 objectives is currently a priority for the Spanish *** recent decades,the housing sector has played a decisive role in increas-ing global energy demands and greenhouse gas emissions(Nejat et al.2015).In 2014 Spain’s housing sector’s energy consumption needs represented 19%of total national consumption and 31%of the electricity demand(IDAE 2013).Starting from the design phase,reduction in energy consumption per square meter has become a prerequisite for the majority of buildings(Parameshwaran et al.2012;Koo et al.2014).The importance and urgency exhibited by the EU housing sector in achiev-ing the government objectives outlined in the 2020 Horizon have led the energy market to show a clear trend towards buildings with higher energy performance in the future(Shimschar et al.2011).Similarly,the success factor of energy efficiency initiatives will depend to a la.ge degree on the method or the indica-tors used when measuring energy performance in each building(Abu Bakar et al.2015;Day and gunderson 2015).As a result,selecting one energy evaluation methodology over another can be decisive in the path taken by Spain,cha.ge the current perception of the country,and increase Spain’s standing within the *** studies(Feist et

关键词： passivhaus standard energy efficiency PHPP Mediterranean climate construction costs