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Acoustic contamination assessment during the transition between the COVID-19 restrictions and reactivation:A exploratory analysis in Guayaquil

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Geography and Sustainability 2023年第2期4卷 138-149页

作者： Andrés Velastegui-Montoya Geancarlo Guerrero-Cabrera Sandra Gonzalez-Camba Yadira jaramillo-Lindao Ricardo Murillo-Portillo j.hidalgo-crespo Luis Encalada-Abarca Centro de Investigación y Proyectos Aplicados a las Ciencias de la Tierra(CIPAT) ESPOL Polytechnic UniversityP.O.Box 09-01-5863GuayaquilEcuador Facultad de Ingeniería en Ciencias de la Tierra(FICT) ESPOL Polytechnic UniversityP.O.Box 09-01-5863GuayaquilEcuador Geoscience Institute Federal University of Pará66075-110BelémBrazil Facultad de Ciencias Naturales y Matemáticas(FCNM) ESPOL Polytechnic UniversityP.O.Box 09-01-5863GuayaquilEcuador Sciences pour la Conception l’Optimisation et la Production(G-SCOP)Centre National de la Recherche Scientifique(CNRS)UniversitéGrenoble Alpes38000GrenobleFrance Facultad de Ingeniería Industrial Universidad de Guayaquil090150GuayaquilEcuador Centre of Geographical Studies Institute of Geography and Spatial PlanningUniversity of Lisbon1600-276LisbonPortugal Universidad Espíritu Santo SamborondónEcuador

Noise pollution is becoming a critical health risk for city *** 2020,the COVID-19 pandemic forced many cities to implement several mobility *** restrictions changed human activity patterns and decreased the noise levels and noise pollution that often affect urban *** the number of infections decreased,so did the outdoor activities,influencing the population’s perception of *** paper aims to evaluate the changes in noise levels associated with mobility restrictions between 2020 and 2021 in Guayaquil,*** study used crowdsourcing with the help of smartphones and mobile applications to collect geo-referenced environmental noise *** data was used to generate noise maps in different time ***,noise level maps were created using GIS-based tools to identify the urban areas that experienced the highest noise level variation during the study *** results show that the most significant noise increase occurred at ***,when analyzing noise level changes in different urban areas,the western area of Guayaquil was the one that experienced the most significant noise level *** inform the perception of noise pollution and could potentially serve as a reference for decision-makers during the proposal of public policies that ensure a better quality of life for its citizens.

关键词： Acoustic contamination Crowdsourcing Data scrubbing Kriging Noise map

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Preliminary Experimental Results of Deep Levels for Dielectronic Recombination in He—Like High—Z Ions at Heidelbreg Electron Beam Ion Trap

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Chinese Physics Letters 2003年第5期20卷 657-659页

作者： ZHANGXue-Mei GUOPan-Lin A.Gonzalez j.crespo AppliedIonBeamPhysicsLaboratory InstituteofModernPhysicsFudanUniversityShanghai200433 ShanghaiInstituteofNuclearResearch ChineseAcademyofSciencesShanghai201800 Max-Planck-InstitutfurKernphysik Saupfercheckweg1D-69117HeidelbergGermany

An experimental system for dielectronic recombination was set-up on H-EBIT in order to carry out dielectronic recombination study. Some preliminary results of He-like Ge32+ and Cu27+ are obtained. Space charge shift on determination of the resonance position for Ge32+ at 100 mA is around 18% and that for Cu27+ is around 38%. Further analysis of experimental data is in progress.

关键词：实验研究二次电子再结合离子捕获电子束自由电子

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Indirect determination of shear wave velocity in slow formations using full-wave sonic logging technique

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journal of Rock Mechanics and Geotechnical Engineering 2020年第6期12卷 1226-1233页

作者： Francisco Beltran Alvaro Yañez-Gonzalez María j.crespo Belgar Engineering Consultants Gabriel García Márquez 9Collado-Villalba28400Spain ESTEYCO Menéndez Pidal 17Madrid28036Spain Principia Engineering Consuxltants Velázquez 94Madrid28006Spain

This article presents a case study concerning a seismic characterization ***-wave sonic logging was used to characterize the shallow compressional wave and shear wave velocity profiles in the *** values of the Poisson’s ratio derived from the velocity profiles suggested that the boreholes might have traversed slow formations(*** shear wave velocity smaller than the borehole fluid compressional wave velocity or“mud-wave speed”)and that conventional processing of the sonic logs might have misinterpreted the direct arrivals of fluid acoustic waves as arrivals caused by shear wave propagation in the ***,the shear wave velocity profiles provided by the contractor were considered to be unreliable by the project *** address these problems,a non-conventional determination of the shear wave velocity was implemented,based on the relationship between the Poisson’s ratio of the rock formation and the shape of the first train of sonic waves which arrived to the receivers in the sonic *** relationship was determined based on several hundreds of finite element simulations of the acoustic wave propagation in boreholes with the same diameter as used in the *** present article describes how this non-conventional approach was developed and implemented to obtain the shear wave velocity profiles from the raw sonic *** approach allows an extension of the range of applicability of full-wave sonic logging to determination of shear wave velocity profiles in formations with low compressional wave *** method could be used to obtain shear wave velocity profiles where compressional wave velocity is as low as slightly larger than the mud-wave speed.A sample sonic log in Log ASCII Standard(LAS)format is provided as supplementary material to this paper via Mendeley Data,together with the FORTRAN source code used to process the log following the approach described in this study.

关键词： Sonic logging Slow formation Shear wave velocity Poisson’s ratio P-wave packet

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Secondary relaxation and dynamic heterogeneity in metallic glasses：A brief review

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Chinese Physics B 2017年第1期26卷 32-41页

作者： j C Qiao[[ Q Wang D crespo Y Yang j M Pelletier School of Mechanics Civil Engineering and Architecture Northwestern Polytechnical University Xi＇an 710072 China Centre for Advanced Structural Materials Department of Mechanical and Biomedical Engineering City University of Hong Kong Kowloon Tong Kowloon Hong Kong China Universite de Lyon MATEIS UMR CNRS5510 Bat. B. Pascal INSA-Lyon F-69621 Villeurhanne cedex France Key Laboratory for Structures Institute of Materials Science Shanghai University Shanghai 200444 China Departament de Fisica EETAC Universitat Politecnica de Catalunya 08860-Castelldfels Barcelona Spain

Understanding mechanical relaxation, such as primary（α） and secondary（β） relaxation, is key to unravel the intertwined relation between the atomic dynamics and non-equilibrium thermodynamics in metallic glasses. At a fundamental level, relaxation, plastic deformation, glass transition, and crystallization of metallic glasses are intimately linked to each other, which can be related to atomic packing, inter-atomic diffusion, and cooperative atom movement. Conceptually, βrelaxation is usually associated with structural heterogeneities intrinsic to metallic glasses. However, the details of such structural heterogeneities, being masked by the meta-stable disordered long-range structure, are yet to be understood. In this paper, we briefly review the recent experimental and simulation results that were attempted to elucidate structural heterogeneities in metallic glasses within the framework of β relaxation. In particular, we will discuss the correlation amongβ relaxation, structural heterogeneity, and mechanical properties of metallic glasses.

关键词： metallic glass structural heterogeneity mechanical property secondary relaxation

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Comprehensive insights into the thermal and mechanical effects of metallic glasses via creep

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journal of Materials Science & Technology 2022年第4期99卷 39-47页

作者： Z.R.Xu j.C.Qiao j.Wang E.Pineda D.crespo School of Mechanics Civil Engineering and ArchitectureNorthwestern PolytechnicalUniversityXi’an 710072China State Key Laboratory of Solidification Processing Northwestern PolytechnicalUniversityXi’an 710072China Department of Physics Barcelona Research Center in Multiscale Science and TechnologyInstitute of Energy TechnologiesUniversitat Politècnica de CatalunyaBarcelona 08019Spain

Evolution of deformation and relaxation behaviors of a prototypical Cu_(46)Zr_(46)A_(l8)metallic glass was explored by extensive creep tests under both physical aging and cyclic *** insights into the microstructure-induced dynamic heterogeneity which accommodates creep deformation were successively revealed via experimental measurements and spectral *** annihilation of local defects within metallic glass with increasing annealing time and cyclic numbers was observed through the reduction of amplitude in both activation energy spectra and relaxation-time spectra,which were also accompanied by an ascending value of β_(KWW).It is further found that the corresponding deformation units within the metallic glass do not disappear permanently,but are recoverable over the course of cyclic *** apparent suppressed relaxation process can be gradually alleviated with increasing resuming time between two consecutive cycles,behaving differently from physical aging,which indicates a notable discrepancy between thermal treatment and mechanical treatment.

关键词： Metallic glasses Creep Physical aging Cyclic loading Relaxation-time spectrum

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Terlipressin versus placebo in living donor liver transplantation

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Hepatobiliary & Pancreatic Diseases International 2022年第1期21卷 76-79页

作者： Paschalis Gavriilidis Ernest hidalgo Robert P Sutcliffe Keith j Roberts Department of Hepato-Pancreato-Biliary and Liver Transplant surgery Queen Elizabeth University Hospitals Birmingham NHS Foundation TrustBirmingham B152THUK Department of Hepato-Pancreatico-Biliary Surgery and Transplantation Hospital Universitari Vall d’HebronBarcelona 08035Spain

To the Editor:Terlipressin is a long-acting synthetic analogue of vasopressin,demonstrating several potential benefits in the context of living donor liver transplantation(LDLT).During the recipient hepatec-tomy,terlipressin reduces the portal ***,it may mitigate the extent of bowel congestion following portal vein *** decreasing portal hyperperfusion and hypertension,it protects the graft from further injury and improves renal blood flow.

关键词： donor liver Terlipressin

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The role of copper in enhancing the performance of heteronuclear diatomic catalysts for the electrochemical CO_(2)conversion to C_(1) chemicals

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journal of Energy Chemistry 2023年第10期85卷 490-500,I0013页

作者： Qi Zhao Rachel crespo-Otero Devis Di Tommaso Department of Chemistry School of Physical and Chemical SciencesQueen Mary University of LondonLondon E14NSUK Department of Chemistry University College LondonLondon WC1H 0AJUK

Diatomic catalysts(DACs)with two adjacent metal atoms supported on graphene can offer diverse functionalities,overcoming the inherent limitations of single atom catalysts(SACs).In this study,density functional theory calculations were conducted to investigate the reactivity of the carbon dioxide(CO_(2))reduction reaction(CO_(2)RR)on metal sites of both DACs and SACs,as well as their synergistic effects on activity and *** of the Gibbs free energies of CO_(2)RR and associated values of the limiting potentials to generate C_(1) products showed that Cu acts as a promoter rather than an active catalytic centre in the catalytic CO_(2)conversion on heteronuclear DACs(CuN_(4)-MN_(4)),improving the catalytic activity on the other metal compared to the related SAC MN_(4).Cu enhances the initial reduction of CO_(2)by promoting orbital hybridization between the key intermediate*COOH 2p-orbitals and the metals 3d-orbitals around the Fermi *** degree of hybridization in the DACs CuN_(4)-MN_(4) decreases from Fe to Co,Ni,and *** work demonstrates how Cu regulates the CO_(2)RR performance of heteronuclear DACs,offering an effective approach to designing practical,stable,and high-performing diatomic catalysts for CO_(2)electroreduction.

关键词： Electrocatalytic CO_(2)reduction Single atom catalysts Diatomic catalysts Graphene Density functional theory calculations

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Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

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Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

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Software Project Effort Estimation Based on Multiple Parametric Models Generated Through Data Clustering

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journal of Computer Science & Technology 2007年第3期22卷 371-378页

作者： juan j.Cuadrado Gallego Daniel Rodríguez Miguel Angel Sicilia Miguel Garre Rubio Angel García crespo Department of Computer Science The University of Alcalá AlcaláSpain Department of Computer Science Carlos Ⅲ University.Madrid Spain

Parametric software effort estimation models usually consists of only a single mathematical relationship. With the advent of software repositories containing data from heterogeneous projects, these types of models suffer from poor adjustment and predictive accuracy. One possible way to alleviate this problem is the use of a set of mathematical equations obtained through dividing of the historical project datasets according to different parameters into subdatasets called partitions. In turn, partitions are divided into clusters that serve as a tool for more accurate models. In this paper, we describe the process, tool and results of such approach through a case study using a publicly available repository, ISBSG. Results suggest the adequacy of the technique as an extension of existing single-expression models without making the estimation process much more complex that uses a single estimation model. A tool to support the process is also presented. Keywords software engineering, software measurement, effort estimation, clustering

关键词： software engineering software measurement effort estimation clustering

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Analysis of the hydrological safety of dams combining two numerical tools:Iber and DualSPHysics

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journal of Hydrodynamics 2018年第1期30卷 87-94页

作者： j.González-Cao O.García-Feal j.M.Domínguez A.j.C.crespo M.Gómez-Gesteira Environmental Physics Laboratory (EPHYSLAB) Universidade de Vigo Campus AsLagoas

The upgrade of the hydrological safety of dams is a critical issue to avoid failures that can dramatically affect people and assets. This paper shows a numerical methodology to analyse the safety of the Belesar dam（NW, Spain） based on two different numerical codes. First, a mesh-based code named Iber, suited to deal with large 2-D domains, is used to simulate the impoundment. The initial conditions and the inlet provided to Iber correspond to the maximum water elevation and the maximum expected inflow to the impoundment defined in the technical specifications of the dam, which are associated to the more hazardous operation conditions of the dam. Iber provides information about the time needed for water to attain the crest of the dam when floodgates are closed. In addition, it also provides the velocity of discharge when gates are opened. Then, a mesh-free code named DualSPHysics, which is especially suited to deal with complex and violent 3-D flows, is used to reproduce the behaviour of one of the spillways of the dam starting from the results obtained with Iber, which are used as inlet conditions for DualSPHysics. The combined results of both model show that the left spillway can discharge the surplus of water associated to the maximum inflow to the reservoir if the gates of the spillways are opened before the overtopping of the dam was observed. In addition, water depth measured on the spillway is considerably lower than the lateral walls, preventing overtopping. Finally, velocities at different points of the spillway showed to be in good agreement with theoretical values.

关键词： Hydrological safety dam numerical simulation Iber DualSPHysics

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