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Boosting hydrogen and chemicals production through ethanol electro-reforming on Pt-transition metal anodes

Journal of Energy Chemistry 2022年第7期31卷 394-406,I0011页

作者： Alberto Rodríguez-Gómez fernando Dorado Paula Sánchez Ana Raquel de la Osa Chemical Engineering Department Faculty of Chemical Sciences and TechnologyUniversity of Castilla-La Mancha

The aim of this work is to boost the combined hydrogen and added-values compounds generation(acetaldehyde, acetic acid and ethyl acetate) through ethanol electrochemical reforming using bimetallic anodes. In particular, the influence of the secondary metal on the electrochemical performance as well as on the product distribution was studied. For that purpose, Pt X/C electrocatalysts(where X corresponds to Cu, Co, Ni and Ru) were synthesized by the modified polyol method and tested in both half-cell and proton exchange membrane(PEM) cell configurations. Characterization results showed that incorporation of Ni and Co into the Pt matrix enhances the morphological properties of the material, providing smaller crystallite sizes, higher active surface areas and hence, better dispersion when comparing to Ru and Cu-based electrocatalysts. Ethanol oxidation reaction(EOR) was evaluated by cyclic, linear voltammetry and chronopotentiometry assays. Pt Co/C and Pt Ni/C exhibited the highest electrocatalytic activity at high polarization levels, which translate into an improvement of more than 30%(up to 1050 m A cm^(-2)) in the hydrogen production and chemical yields. On the other hand, Pt Ru/C results more advantageous for a lower potential interval(<0.85 V) promoting the acetic acid production despite sacrificing ethanol conversion. Pt Cu/C presented the lowest results in both electrochemical performance and product distribution. Such differences in the electrochemical performance can be rationalized in terms of the synergistic effect between both metals(particle size distribution, grade of dispersion and hydrophilic behavior), which demonstrate that the incorporation of a different secondary metal plays an essential role in the EOR development.

关键词： Ethanol electrochemical reforming Bimetallic anodic electrocatalysts PEM cell High current performance Hydrogen Chemicals production

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Stochastic Earned Duration Analysis for Project Schedule Management

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Engineering 2022年第2期8卷 148-161页

作者： fernando Acebes David Poza JoséManuel González-Varona Adolfo López-Paredes GIR INSISOC-Department of Business Organization and CIM School of Industrial EngineeringUniversity of ValladolidValladolid 47011Spain

Earned duration management(EDM)is a methodology for project schedule management(PSM)that can be considered an alternative to earned value management(EVM).EDM provides an estimation of devia-tions in schedule and a final project duration *** is a key difference between EDM and EVM:In EDM,the value of activities is expressed as work periods;whereas in EVM,value is expressed in terms of *** this paper,we present how EDM can be applied to monitor and control stochastic *** explain the methodology,we use a real case study with a project that presents a high level of uncertainty and activities with random *** analyze the usability of this approach according to the activities network topology and compare the EVM and earned schedule methodology(ESM)for PSM.

关键词： Earned duration management Earned value management Stochastic project control Duration forecasting Uncertainty

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Efficient Splitting Methods Based on Modified Potentials:Numerical Integration of Linear Parabolic Problems and Imaginary Time Propagation of the Schrodinger Equation

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Communications in Computational Physics 2023年第4期33卷 937-961页

作者： Sergio Blanes fernando Casas Cesáreo González Mechthild Thalhammer Universitat Politècnica de València Instituto de Matemática Multidisciplinar46022 ValenciaSpain Universitat Jaume I IMAC and Departament de Matemàtiques12071 CastellónSpain Universidad de Valladolid Departamento de Matemática Aplicada47011 ValladolidSpain Leopold–Franzens–Universität Innsbruck Institut für Mathematik6020 InnsbruckAustria.

We present a new family of fourth-order splitting methods with positive coefficients especially tailored for the time integration of linear parabolic problems and,in particular,for the time dependent Schrodinger equation,both in real and imaginary *** are based on the use of a double commutator and a modified processor,and are more efficient than other widely used schemes found in the ***,for certain potentials,they achieve order *** examples in one,two and three dimensions clearly illustrate the computational advantages of the new schemes.

关键词： Schrodinger equation imaginary time propagation parabolic equations operator splitting methods modified potentials

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Over-height truck collisions with railway bridges:attenuation of damage using crash beams

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Earthquake Engineering and Engineering Vibration 2022年第1期21卷 237-252页

作者： Dan Xu Xinxing Yuan Ali Irmak Ozdagli Marlon Agüero Roya Nasimi Tao Wang fernando Moreu Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina EarthquakeAdministrationSanhe 065201China Department of Civil Construction and Environmental EngineeringUniversity of New MexicoAlbuquerqueNM 87131USA Courtesy Appointment Department of Electrical and Computer EngineeringUniversity of New MexicoAlbuquerqueNM 87131USA Courtesy Appointment Department of Mechanical EngineeringUniversity of New MexicoAlbuquerqueNM 87131USA

Railway bridges are susceptible to over-height truck collisions and to address this issue,it is necessary to attenuate the effect of these impacts to ensure the safety of transportation *** study experimentally investigates the effectiveness of crash beams as a cushioning mechanism for railway bridges against ***-height truck and railway bridge impact events were simulated in a 1:5 scale *** design parameters such as the stiffness of the crash beam and the bridge supports were scaled to evaluate different levels of *** experiments were conducted with five configurations consisting of four different types of crash beams and one no-crash beam *** results show that crash beams attenuate bridge total peak dynamic displacement responses between 14.5%and 35.7%,depending on the intensity of the impact and crash beam *** addition,the results show that the average effectiveness in attenuating residual deformation for all four crash beams ranges from 43.03%to 83.40%.Finally,various designs and their effectiveness against lateral impacts with different speeds are *** overall scope of this research is to provide objective information about the design of crash beams for railway bridges based on their response to over-height truck collisions at various speeds.

关键词： railway bridge over-height truck impact attenuation crash beam dynamic displacement scaled model

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Genetic diversity of Leishmania donovani isolates from cutaneous lesions of military personnel in the Mullaitivu and Kilinochchi districts of the Northern Province,Sri Lanka

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Asian Pacific Journal of Tropical Medicine 2022年第9期15卷 418-424页

作者： Tharaka Wijerathna Nayana Gunathilaka Saveen Semege Nishantha Pathirana Wasana Rodrigo Deepika fernando Department of Parasitology Faculty of MedicineUniversity of KelaniyaRagamaSri Lanka Directorate of Army Preventive Medicine&Mental Health Services Army HeadquartersSri JayawardenepuraSri Lanka Sri Lanka Army Hospital ColomboSri Lanka Department of Zoology Faculty of Natural SciencesOpen University of Sri LankaNawalaNugegoda Department of Parasitology Faculty of MedicineUniversity of ColomboSri Lanka

Objective:To compare the DNA sequences of Leishmania(L.)donovani isolated from individuals in two districts of the Northern Province with other parts of Sri Lanka and neighboring ***:Samples were collected from military personnel at the Army Hospital,Narahenpita,Sri Lanka from November 2018 to March 2020.A portion of the samples was fixed,stained with Giemsa and observed under the light *** genomic The DNA was extracted from the remaining portion of the samples using DNEasy blood tissue kit(Qiagen,Germany)and amplified using Leishmania genus-specific primers for molecular diagnosis *** was amplified using *** species-specific primers by PCR and the amplified product was sequenced for comparison of nucleotide ***:Out of 76 suspected patients,at least one biological sample of 45(59.2%)was positive for *** upon ***,33(43.4%)were positive in Leishmania genus-specific PCR,but only 23(30.3%)were positive in *** specific *** dendrogram indicates that the current sequences clustered together with those from Nepal and Gampaha districts(Western Province),Sri Lanka,while the Indian and Eastern African sequences clustered ***:The genetic diversity was low among the isolates,indicating a single and possibly a local point of ***,the similarity of Sri Lankan and Nepal strains indicate a possibility of a shared point of origin,which needs more extensive evidence to confirm.

关键词： Leishmaniasis Sri Lanka Phylogenetics Kilinochchi Mullaitivu Northern Province

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On the viability of wearing evaluation by Thin Layer Activation in the presence of non-occupationally exposed individuals

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Nuclear Science and Techniques 2022年第3期33卷 103-112页

作者： Michel de Almeida Franca Julio Cezar Suita Paulo fernando Ferreira Frutuoso e Melo Celso Marcelo Franklin Lapa Graduate Program of Nuclear Engineering COPPEFederal University of Rio de JaneiroRio de JaneiroRJ 21941914Brazil Instituto de Engenharia Nuclear(IEN-CNEN) Rio de Janeiro 21941614Brazil Comissao Nacional de Energia Nuclear(SEASE/DRS/CNEN) Rio de Janeiro 22290040Brazil

Thin Layer Activation is a nuclear technique that has key advantages over other wear measuring techniques for mechanical systems,especially for in site experiments on equipment important to safety in nuclear ***,it incurs radioactive dose and,thus,must be proved radiologically safe before use,otherwise,the utilization of this technique may be hindered *** said technique is safe previous to any operational/monetary cost is key,providing a methodology for this early assertion is the main contribution of this work—here,only non-occupationally exposed individuals are *** work offers a methodology,through a case study,to ascertain the Thin Layer Activation parameters to obtain safe levels of radioactive dose while maintaining statistically reliable *** methodology consists of using simulations,through the Monte Carlo Method,to obtain the floors and ceilings for the previously mentioned activation parameters based on operation and work conditions on site.

关键词： Thin Layer Activation Safety evaluation Simulation Equipment wearing

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Smart Contract to Traceability of Food Social Selling

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Computers, Materials & Continua 2023年第3期74卷 4703-4728页

作者： Cristian Valencia-Payan Joséfernando Grass-Ramírez Gustavo Ramirez-Gonzalez Juan Carlos Corrales University of Cauca Calle 5#4-70190003Popayan-CaucaColombia

Traditionally,food sustainability has been considered solely in the stage of agricultural ***,globalization,the expansion of the food production industry,and the emergence of supermarket chains that control the retail food market require specific significant changes in supply chains in the food sector and,therefore,we need to address the economic,social,and environmental impacts of these *** the other hand,social selling has increased rapidly in recent years,with a further boom,following current events related to the coronavirus disease(COVID-19).This explosion of social sales,where there are usually no control and regulation entities,can bring problems associated with mishandling *** this paper,we expose how Blockchain technology supports the traceability of social sales by validating the data provided by the chain participants such as digital health passports,production and transport data in the sale process;the proposed solution generates recommendations on productmanagement considering the agreements previously made by the network *** evaluate the proposed smart contracts,we useHyperledger Caliper,obtaining an average throughput of 12.6 transactions per second and an average latency of 0.3 s for the asset update *** also use a study case to evaluate the proposed project platform’s selling-transport stage using Internet of Things(IoT)sensors.

关键词： Blockchain reliability smart contracts social selling traceability artisan sweets

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Meso-Archean to Mid-Paleozoic Granitoids in Oulad Dlim Massif(the Pericratonic Terrane of the Reguibat Shield,West African Craton,Morocco):Petrology,Geochemistry,Geochronology and Geological Implications

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Journal of Earth Science 2022年第5期33卷 1152-1165页

作者： Haissen Faouziya Montero Pilar Molina Jose Francisco Lodeiro Francisco Mouttaqi Abdellah Chaib Mustapha Bea fernando LGAGE Département de GéologieFacultédes Sciences Ben M’sikHassan II University of CasablancaB.P.5366MaarifCasablancaMaroc Department of Mineralogy and Petrology University of GranadaCampus FuentenuevaGranada18002Spain Office National des Hydrocarbures et des Mines 5 Avenue Moulay HassanRabatMaroc

The Oulad Dlim Massif,adjacent to the Reguibat Shield in South Morocco was considered up to now as part of the Variscan belt(Mauritanides)with a polyphase geologic history and a complex geodynamic evolution implicating oceans closures and accretion of exotic terranes(Avalonian and Meguman)during the Variscan-Alleghanian *** use of modern technology to characterize the petrology,the geochemistry and the geochronology of the lithological units forming this region,combined to field surveys has led to an updated geological architecture and different geological *** Oulad Dlim Massif is mainly a deformed Archean terrane,as recorded by its eastern and western sectors,dominated in its central part by a bimodal felsic-mafic magmatism forming the Ediacaran *** study of these magmatic complexes supports strongly the intracontinental origin of this bimodal magmatism *** oceanic origin published before in *** exploration of this massif conducted also to the identification of a Silurian-Devonian sector in the western ***,up to date,different magmatic events lasting from the Meso-Archean to the Cretaceous are recorded in the Oulad Dlim Massif rocks,among them different generations of granitoids are *** data on granitoids from the Ediacaran sector are presented in this *** recent data demonstrates that Oulad Dlim Massif has been affected by the main Ediacaran–Cambrian extensional event widely documented in other structural domains of Morocco and other parts of North ***,the study of the Silurian-Devonian sector rocks highlighted the presence of a Caledonian tectonic event challenging the ideas about the paleogeography of this part of northwestern Africa and its geological evolution during the ***,despite the significant contribution of this extensive survey and the abundance of data on the Oulad Dlim Massif,more studies are required to reconstruct the puzzle at plate tectonic scale.

关键词： Archean Ediacaran bimodal magmatism extension intracontinental rifting Caledonian tectonic event petrology geochemistry

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Delay Times and Clinical Outcomes in Acute Myocardial Infarction: Comparison of Periods before and during the COVID-19 Pandemic—Myocardial Infarction and the Pandemic

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World Journal of Cardiovascular Diseases 2024年第6期14卷 392-400页

作者： Clarice Teixeira Silva Araújo Arnon Salviato Mameri Thúlio Carrera Guarçoni Venturini Marcus Tadeu Aguilar Constantino Matos Igor Morais Araujo Lopes Luiz Gustavo Ribeiro de Carvalho Murad Cleberson Duartes Ovani Guilherme Vassalo Morais Fernanda Venturini de Castro Danielle Lopes Rocha Lucas Crespo de Barros Rodolfo Costa Sylvestre Luiz fernando Machado Barbosa Roberto Ramos Barbosa Internal Medicine Universidade Federal do Esprito Santo (UFES) Vitria Brazil Hospital Santa Casa de Misericrdia de Vitria Vitria Brazil Hospital Santa Rita de Cssia Vitria Brazil Hospital Estadual Dr. Jayme Santos Neves Serra Brazil Grupo Kora Sade Vitria Brazil Hospital Estadual Infantil e Maternidade Alzir Bernardino Alves (HIMABA) Vila Velha Brazil

Introduction: At the beginning of the COVID-19 pandemic, a drop in the number of patients treated for cardiac emergencies raised concern about cardiovascular mortality in that period. An increase in care delay for patients with ST-segment elevation myocardial infarction (STEMI) may have affected clinical outcomes. Objectives: To analyze delay times and clinical outcomes of patients with STEMI undergoing primary percutaneous coronary intervention (PPCI), before and during the COVID-19 pandemic. Methods: Retrospective observational study that included patients with STEMI undergoing PPCI from December 2018 to July 2021. The COVID-19 pandemic cases were divided into two groups: pandemic I—from March to August 2020;and pandemic II—from September 2020 to July 2021. Patients were compared according to the period of hospitalization. Primary outcomes were delay times in assistance and clinical outcomes (acute kidney injury [AKI], post-procedural vascular complications and in-hospital mortality). Results: 108 patients were included, 39 (36.1%) in the pre-pandemic period, 13 (12.1%) in pandemic I and 56 (51.8%) in pandemic II. Time from onset of symptoms to arrival at the service and door-to-balloon time did not differ significantly among groups. Vascular complications were more frequent during the pandemic (I and II) than in the pre-pandemic period (2.5% pre-pandemic vs 15.4% pandemic vs 12.5% pandemic II;p = 0.03). AKI incidence was similar in all three periods. There was a non-significant increase in in-hospital mortality during the COVID-19 pandemic. Conclusion: In patients with STEMI, there was an increase in vascular complications and a trend toward increased mortality during the COVID-19 pandemic. Delay times to admission and reperfusion did not differ significantly between before and during the pandemic.

关键词： Myocardial Infarction Primary Percutaneous Coronary Intervention Coronary Reperfusion Pandemic COVID-19

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Challenges in Implementing DVI Best Practice Guidelines Due to the Brumadinho Disaster

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Forensic Medicine and Anatomy Research 2024年第1期12卷 1-12页

作者： Reinaldo Moreira Silva Bruno Diniz Sander Morais Carlos Danilo Ruas Silva Elza Cristina Lopes de Oliveira fernando Pereira Macedo Giovanni Vitral Pinto Guadalupe Dell’Arret Coutinho Higgor Gonçalves Dornelas João Luiz Silva Moreira Laila Evangelista de Almeida Fernandes Marcia Lobão Iannini Patrícia Siqueira Valéria Rosalina Dias e Santos Sordaini Maria Caligiorne Instituto de Criminalística Polícia Civil de Minas Gerais Belo Horizonte Brazil

The broke of a tailings dam from Vale S.A. destroyed a gigantic area killing 270 persons in Brumadinho/Brazil. Organizing activities after a mass disaster is a complex process that requires the involvement of many people and resources in the laboratory. To DNA identification of the victims, a daunting work had to be made by DNA laboratory staff in a collaborative effort with many partners. Efforts to implement good practice guidelines in Disaster Victim Identification (DVI) have revealed several important aspects that need to change in the forensic DNA laboratory. This article highlights the challenges of implementing DVI best practice guidelines in resource-poor settings, but with professionals from different sectors engaged in the same goal of briefly identifying victims and helping families and society.

关键词： Disaster Victim Identification DNA Brumadinho

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