Search results for "Hf"

showing 10 items of 909 documents

Zr, Hf and REE fractionation between dissolved pool and sediments in river waters. Effect of changing ionic strength conditions in element partitioni…

Rare Earth ElementsZr and HfColloids
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Numerical Simulation of Friction Stir Welding by Natural Element Methods

2008

In this work we address the problem of numerically simulating the Friction Stir Welding process. Due to the special characteristics of this welding method (i.e., high speed of the rotating pin, very large deformations, etc.) finite element methods (FEM) encounter several difficulties. While Lagrangian simulations suffer from mesh distortion, Eulerian or Arbitrary Lagrangian Eulerian (ALE) ones still have difficulties due to the treatment of convective terms, the treatment of the advancing pin, and many others. Meshless methods somewhat alleviate these problems, allowing for an updated Lagrangian framework in the simulation. Accuracy is not affected by mesh distortion (and hence the name mes…

Regularized meshless method0209 industrial biotechnologyMaterials scienceMechanical engineering010103 numerical & computational mathematicsWelding02 engineering and technology01 natural scienceslaw.invention[SPI.MAT]Engineering Sciences [physics]/Materialssymbols.namesakeFSW Meshless020901 industrial engineering & automation0203 mechanical engineeringlawMeshfree methodsFriction stir weldingGeneral Materials Science0101 mathematicsSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneMaterial point methodComputer simulationbusiness.industryEulerian pathStructural engineering[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]Finite element method020303 mechanical engineering & transportssymbolsbusiness
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Unconditionally stable meshless integration of time-domain Maxwell’s curl equations

2015

Grid based methods coupled with an explicit approach for the evolution in time are traditionally adopted in solving PDEs in computational electromagnetics. The discretization in space with a grid covering the problem domain and a stability step size restriction, must be accepted. Evidence is given that efforts need for overcoming these heavy constraints. The connectivity laws among the points scattered in the problem domain can be avoided by using meshless methods. Among these, the smoothed particle electromagnetics, gives an interesting answer to the problem, overcoming the limit of the grid generation. In the original formulation an explicit integration scheme is used providing, spatial a…

Regularized meshless methodElectromagneticsDiscretizationMeshless methodsApplied MathematicsMathematical analysisADI leapfrog methodSettore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaComputational MathematicsAlternating direction implicit methodProblem domainSmoothed particle electromagneticsComputational electromagneticsMeshfree methodsApplied mathematicsTime domainMathematicsApplied Mathematics and Computation
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A novel numerical meshless approach for electric potential estimation in transcranial stimulation

2015

In this paper, a first application of the method of fundamental solutions in estimating the electric potential and the spatial current density distribution in the brain due to transcranial stimulation, is presented. The coupled boundary value p roblems for the electric potential are solved in a meshless way, so avoiding the use of grid based numerical methods. A multi-spherical geometry is considered and numerical results are discussed.

Regularized meshless methodMathematical optimizationmethod of fundamental solutionQuantitative Biology::Neurons and CognitionNumerical analysistranscranial electrical stimulationCurrent density distributionGrid basedBoundary valuesPhysics and Astronomy (all)Settore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaApplied mathematicsMethod of fundamental solutionsMeshfree methodsmeshless methodElectric potentialnumerical approximationMathematics
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Studying the User Experience in Online Banking Services: An Eye-Tracking Application

2019

Abstract Neuromarketing as research method contrbutes to understanding consumer behavior a step further than traditional marketing research. The aim of the current study is to explore the usability and cognitive understanding of banking services webpages. In this regard, the theoretical part of the article reviews the relevant literature related to neuromarketing as research method and the use of eye-tracker as research technique. Further on, a two-step research design was developed for studying the consumers’ attention and memory during and after viewing two Romanian banking services websites. The results showed that the way information is structured and presented on the webpages influence…

Research design010407 polymersKnowledge managementHF5001-6182Social PsychologyComputer scienceEconomics Econometrics and Finance (miscellaneous)Neuromarketingconsumer attention01 natural sciencesUser experience design0502 economics and businessBusinessMarketing researchConsumer behaviourbusiness.industry05 social sciencesUsabilityCognitionconsumer memoryeye-tracker0104 chemical sciencesbanking servicesBusiness Management and Accounting (miscellaneous)Eye tracking050211 marketingneuromarketingbusinessStudies in Business and Economics
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Turning the tide: Registered nurses' job withdrawal intentions in a Finnish university hospital

2012

Orientation: Given the global shortage of registered nurses, it is important to investigate the intentions for job withdrawal of nurses, and resolve these, in order to retain nurses in the field. Research purpose: The objective was to examine the intentions for job withdrawal of ageing and younger nurses, and the antecedents of these intentions, with special reference to job control and perceived development opportunities. The age of 45 was adopted as a starting point when referring to ageing employees. Motivation for the study: Different forms of job withdrawal have rarely been studied together and associated. Research design, approach and method: A quantitative study was applied with logi…

Research designResponse rate (survey)Organizational Behavior and Human Resource Managementlcsh:Personnel management. Employment managementJob controlControl (management)lcsh:HF5549-5549.5nursing professionJob attituderetirementNursingJob performanceHuman resource managementsurveyJob satisfactionPsychologySocial psychologyta512Human Resource ManagementFinlandDemographySA Journal of Human Resource Management
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Como as práticas ecológicas e o desperdício de alimentos influenciam o capital de marca do restaurante?

2020

Resumen El presente trabajo tuvo por objetivo evaluar la incidencia de las prácticas verdes, la innovación sostenible y el manejo del desperdicio alimentario en la construcción del capital de marca de los restaurantes. A partir de una investigación cuantitativa dirigida a responsables de restaurantes en Ecuador, se obtuvieron 120 cuestionarios válidos que permitieron estimar un modelo de ecuaciones estructurales a través de la regresión de mínimos cuadrados parciales. Los resultados obtenidos evidencian que las prácticas verdes orientadas a la formación del empleado y la innovación sostenible contribuyen significativamente a la reducción del desperdicio alimentario, que, a su vez, junto a l…

Residuos alimentariosRestaurantsStrategy and ManagementRestaurantesConsumidoresServices//vocabularies.unesco.org/thesaurus/concept1545 [http]PercepciónResources managementCapital de marca//vocabularies.unesco.org/thesaurus/concept10043 [http]Tratamiento de desechos//vocabularies.unesco.org/thesaurus/concept6382 [http]Management of Technology and Innovation//id.loc.gov/authorities/subjects/sh00005605 [http]waste recyclingConsumo alimentarioMercadoSupply and demandWastesMarketingM31 Marketing//id.loc.gov/authorities/subjects/sh85099708 [http]//id.loc.gov/authorities/subjects/sh2011004561 [http]Tratamiento de desperdiciosmanejo del desperdicio alimentarioConsumo de alimentos//id.loc.gov/authorities/subjects/sh85031491 [http]sustainable innovation//id.loc.gov/authorities/subjects/sh85050268 [http]SostenibilidadResiduos de alimentosWaste treatmentQ56 Sustainabilitycapital de marcaSustainabilityConsumo alimenticio//id.loc.gov/authorities/subjects/sh85113249 [http]sustentabilidadeMarketsgreen practicesEconomics and Econometrics//vocabularies.unesco.org/thesaurus/concept1833 [http]Organic wastesTratamiento de residuosServiciossostenibilidadlcsh:BusinessL83 RestaurantsManejo del desperdicio alimentarioInnovación sostenible//vocabularies.unesco.org/thesaurus/concept6436 [http]innovación sosteniblefood waste managementdesperdício de alimentosDesechosPrácticas verdesFood consumptionBusiness and International Management//id.loc.gov/authorities/subjects/sh2009000375 [http]//vocabularies.unesco.org/thesaurus/mt6.65 [http]Desperdicio alimentarioOferta y demandaFood wasteReciclaje de desperdiciosbrand equityResiduos orgánicospráticas verdesGestión de recursosDesperdiciorestaurantesinovação sustentávelWaste//vocabularies.unesco.org/thesaurus/concept15060 [http]PerceptionConsumersprácticas verdeslcsh:HF5001-6182//vocabularies.unesco.org/thesaurus/concept4056 [http]Finance
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O modelo da economia do bem comum: abordagem a partir da abordagem organizacional e análise bibliométrica

2019

Resumen El trabajo tuvo por objeto realizar una aproximación al modelo de la economía del bien común desde la organización de empresas, así como desde un análisis bibliométrico. Se realizó una comparación entre el enfoque empresarial de la economía del bien común y dife- rentes teorías organizativas: recursos y capacidades, stakeholders y creación de valor compartido. Mediante el análisis bibliométrico, se identificaron los trabajos publicados sobre la economía del bien común desde su surgimiento en 2010 hasta 2018, mediante búsqueda realizada en Web of Science y Dialnet. Se demuestra que su enfoque empresarial está relacionado con diferentes teorías de la organiza- ción de empresas y que a…

Responsabilidad social empresarialEconomics and EconometricsStrategy and Managementvalor compartilhadolcsh:Businesseconomia do bem comum050105 experimental psychologyEconomía03 medical and health sciencesbibliometric analysisStakeholdersBien común -- Aspectos económicos0302 clinical medicineManagement of Technology and Innovationanálise bibliométrica0501 psychology and cognitive sciencesBusiness and International Managementshared valuevalor compartidoModelos económicoseconomia baseada em recursosteoria dos stakeholdersMarketingresource-based economystakeholder theory05 social scienceseconomía basada en recursoseconomía del bien comúnDesarrollo empresarialanálisis bibliométricoValor (Economía)teoría de los stakeholderseconomy for the common goodlcsh:HF5001-6182Bibliometría.030217 neurology & neurosurgeryFinanceEstudios Gerenciales
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Efeitos da sustentabilidade e valor logístico nas relações entre empresas de transporte marítimo

2020

Resumen El objetivo de este trabajo fue analizar cómo la sostenibilidad (económica, social y ambiental), bajo el enfoque de triple línea base, afecta la calidad de servicio, el valor logístico y la satisfacción en empresas del sector marítimo. Se propone un modelo teórico que se contrasta con la información suministrada por una muestra de 50 responsables de empresas (transitarios, importadores y exportadores) en Panamá. La información se analiza mediante la estimación de regresión por mínimos cuadrados parciales, que permite confirmar el carácter multidimensional de la sostenibilidad y del valor logístico. Los resultados también confirman que las percepciones de los clientes sobre las inici…

Responsabilidad social empresarialrelaciones business to businessEconomicsStrategy and Management//vocabularies.unesco.org/thesaurus/concept585 [http]Calidad de servicioRelaciones business to businessSatisfactionInternational tradeSocial responsibilityshipping industry//id.loc.gov/authorities/subjects/sh87004890 [http]Crecimiento económicoEmbarque de mercancíaspráticas sustentáveisCompañías de navegaciónindústria marítimaComercio internacionalManagement of Technology and InnovationShipment of goods//vocabularies.unesco.org/thesaurus/concept16052 [http]//vocabularies.unesco.org/thesaurus/concept3534 [http]logistic valueMarketing//id.loc.gov/authorities/subjects/sh85081260 [http]//id.loc.gov/authorities/subjects/sh85127728 [http]Responsabilidad socialCommerce internationalPrácticas sosteniblesMarine resources conservationSostenibilidadqualidade de serviçoQ56 SustainabilitySustainabilitybusiness-to-business relationships//vocabularies.unesco.org/thesaurus/concept6828 [http]Transporte marítimosustainable practicesEmploymentEconomics and Econometricsdemand supply and congestion [R41 Transportation]//id.loc.gov/authorities/subjects/sh85121576 [http]Steamboat linesConservación de los recursos marinos//id.loc.gov/authorities/subjects/sh85121579 [http]lcsh:Businessvalor logísticoindustria marítima//vocabularies.unesco.org/thesaurus/concept11744 [http]EconomíaShippingComercio exteriorSatisfacciónTransporte acuáticoBusiness and International Management//id.loc.gov/authorities/subjects/sh2009000375 [http]Economic growth//vocabularies.unesco.org/thesaurus/concept682 [http]calidad de servicioEconómicasprácticas sosteniblesIndustria marítimarelações business to businessSocial responsibility of business//id.loc.gov/authorities/subjects/sh85040850 [http]Maritime transport//id.loc.gov/authorities/subjects/sh85020473 [http]quality of service//id.loc.gov/authorities/subjects/sh85117681 [http]CarriersValor logísticolcsh:HF5001-6182Empresas de transporteEmpleoFinance
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Measuring Firm Performance: Testing a Proposed Model

2018

Abstract Firm performance is a very complex and exhaustive concept. It can be related to many factors: starting with variables from balance sheet, income statement or cash-flow statement, continuing with research and development expenses or IT competences, and last but not least with intangible assets like human capital, goodwill, or brand value. The purpose of the present paper is to develop and test a model in order to measure firm performance by considering US companies that are ranked into the Global Fortune 500. In this study we used control variables (assets growth rate, net income growth rate and revenue growth rate) and depended variables – return on assets (ROA), debt to equity, re…

Return on assetsmodelSocial PsychologyHF5001-618205 social sciencesEconomics Econometrics and Finance (miscellaneous)us-based companiesHuman capitalfirm performanceMicroeconomicsDebt-to-equity ratioNet incomeIncome statement0502 economics and businessGoodwillBusiness Management and Accounting (miscellaneous)Balance sheetBusinessBusiness050207 economicsOperating expense050203 business & managementStudies in Business and Economics
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