Search results for "Instrument"

showing 10 items of 5652 documents

Impact of humic acids on EYL liposome membranes: ESR method

2015

Abstract In this paper, the effects of model (commercial) and natural (extracted from peat) humic substances on the membrane of liposomes formed with egg yolk lecithin (EYL) are presented. In our research, mass concentrations of fulvic and humic acids were used, which in relation to lecithin varied from 0% to 13%. To study membrane fluidity, electron spin resonance (EPR) was used with two spin probes, penetrating various regions of the lipid bilayer. The effects of model and natural humic substances (humic acids – HAs and fulvic acids – FAs) on the lipid membrane in different regions were researched: the lipid-water interphase, and in the middle of the lipid bilayer. It was shown that FA an…

esr methodNuclear and High Energy PhysicsLiposomeChromatographyhumic substanceseyl liposomesScienceQCondensed Matter Physicscomplex mixturesMembraneNuclear Energy and EngineeringSafety Risk Reliability and QualityWaste Management and DisposalInstrumentationNukleonika
researchProduct

Fiabilidad y evidencias de validez de un instrumento para la evaluación de la calidad de los mapas conceptuales

2017

Diversos autores han señalado el interés y la pertinencia de los mapas conceptuales como herramientas para el aprendizaje significativo. Sin embargo, la revisión de la literatura pone de manifiesto la escasez de propuestas dirigidas a la evaluación de los mapas con criterios objetivables y la complejidad de las existentes. El objetivo del presente estudio fue desarrollar un instrumento para la evaluación de los mapas conceptuales en formato rúbrica. De esta manera, se consigue que los alumnos posean una herramienta que permita, mediante indicadores precisos, la evaluación de la calidad tanto de sus ejecuciones como de las ejecuciones realizadas por otros. Se construyó una rúbrica que incluy…

estrategia de aprendizajeConcept mapmedia_common.quotation_subjectApplied psychologyDiscriminant validityRubricEducation (General)General MedicineinstrumentoLevaluaciónmapas conceptualesEducationinstrumento de medidaInter-rater reliabilityMeaningful learningenseñanza superiorRelevance (information retrieval)Quality (business)L7-991intervenciónTraining programPsychologymedia_commonmapa conceptual
researchProduct

Elaboración de un instrumento para la evaluación de la docencia por parte de los estudiantes para el Instituto Tecnológico de Costa Rica

2014

La presente investigación tiene como objetivos principales determinar si el instrumento para evaluar la docencia en el Instituto Tecnológico de Costa Rica (ITCR) puede identificar una docencia de calidad por parte del profesorado, cuáles son los niveles de validez, fiabilidad y sesgos en el instrumento y finalmente poder suministrar un nuevo instrumento al Instituto para evaluar al profesorado. Para ello, se elaboró un instrumento de evaluación docente tomando como base el utilizado en el ITCR, el instrumento contó con 32 ítems separados en 12 dimensiones con una escala de valoración del desempeño de 6 puntos y una escala para conocer la importancia de los ítems de 4 puntos. Este instrument…

estudiantesinstrumento:PEDAGOGÍA [UNESCO]UNESCO::PEDAGOGÍAevaluacióndocencia
researchProduct

La evaluación psicopedagógica del alumnado con altas capacidades

2012

Se describen los instrumentos de evaluación psicopedagógica aplicables al alumnado con altas capacidades. Instrumentos referidos al alumno, al contexto escolar, a las variables socio-familiares y la determinación de las necesidades educativas especiales.

evaluación psicopedagógicaaltas capcidadesinstrumentos evaluación
researchProduct

Recent advances in ground-based ultraviolet remote sensing of volcanic SO2 fluxes

2011

Measurements of volcanic SO2 emission rates have been the mainstay of remote-sensing volcanic gas geochemistry for almost four decades, and they have contributed significantly to our understanding of volcanic systems and their impact upon the atmosphere. The last ten years have brought step-change improvements in the instrumentation applied to these observations, which began with the application of miniature ultraviolet spectrometers that were deployed in scanning and traverse configurations, with differential optical absorption spectroscopy evaluation routines. This study catalogs the more recent empirical developments, including: ultraviolet cameras; wide-angle field-of-view differential …

event.disaster_typegeographygeography.geographical_feature_categorySpectrometerEarth scienceDifferential optical absorption spectroscopylcsh:QC801-809Volcanologylcsh:QC851-999Volcanology Volcanic Gases Volcano monitoring Volcanic effects upon atmosphere Atmospheric instruments and techniques.Volcanic GasesAtmospherelcsh:Geophysics. Cosmic physicsGeophysicsVolcanoRemote sensing (archaeology)Radiative transfereventlcsh:Meteorology. ClimatologyGeologyRemote sensingAnnals of Geophysics
researchProduct

First multi-GAS based characterisation of the Boiling Lake volcanic gas (Dominica, Lesser Antilles)

2013

We used a Multi-component Gas Analyser System (Multi-GAS) to measure, for the very first time, the composition (H2O, CO2, H2S, SO2) of the volcanic gas plume issuing from the Boiling Lake, a vigorously degassing, hot (T ~ 80-90°C) volcanic lake in Dominica, West Indies. The Multi-GAS captured in-plume concentrations of H2O, CO2 and H2S were well above those typical of ambient atmosphere, while no volcanic SO2 was detected (<0.05 ppm). These were used to derive the Boiling Lake plume characteristic ratios of CO2/H2S (5.2±0.4) and H2O/CO2 (31.4±6). Assuming that other volcanic gas species (e.g., HCl, CO, H2, N2, etc.) are absent in the plume, we recalculated a (air-free) composition fo…

event.disaster_typegeographygeography.geographical_feature_categorylcsh:QC801-809GeochemistryInstruments and techniquesGases Volcano monitoringlcsh:QC851-999Geochemical dataFumarolePlumeVolcanic GasesAtmospherelcsh:Geophysics. Cosmic physicsGeophysicsVolcano13. Climate actionBoilingeventlcsh:Meteorology. ClimatologyGas compositionGeomorphologyData scrubbingGeologyVolcanic riskAnnals of Geophysics
researchProduct

Development and Psychometric Validation of the Brief Nurses' Practice Environment Scale and Its Relation to Burnout Syndrome and Job Satisfaction: A …

2020

Introduction: Nursing environment is a vast concept that traditionally has included a wide range of job characteristics and has been related to burnout and job satisfaction. For its measurement, the Practice Environment Scale of the Nursing Work Index (PESNWI) stands out. However, shorter instruments are needed. The purpose of the study is to develop and test the Brief Nurses' Practice Environment (BNPE) Scale.Methods: The BNPE Scale was developed and tested in a sample of 210 Spanish nurses (data collection 2018).Results: Cronbach's alpha was 0.702. The confirmatory factor analysis (CFA), with an excellent fit, offered evidence of internal validity. Regarding validity, the BNPE Scale predi…

factor analisysData collectionburnout - professionalPsychometricspractice nursingPublic Health Environmental and Occupational HealthNursesBrief Research ReportBurnoutConfirmatory factor analysisTest (assessment)instrument development (MeSH)Cronbach's alphaNursingScale (social sciences)HumansJob satisfactionPublic HealthInternal validityPublic aspects of medicineRA1-1270PsychologyBurnout Professionaljob satisfactionFrontiers in Public Health
researchProduct

Diseño y validación de un instrumento para evaluar los Estilos Educativos Familiares. EVALEF.

2017

En la sociedad, la familia supone un núcleo que suscita gran interés por su importancia y repercusiones en las personas tanto a nivel individual como grupal. Dentro de la misma, este estudio se centra en diseñar y validar un instrumento de evaluación de los Estilos Educativos Familiares (EEF, de aquí en adelante) que ejercen los padres hacia sus hijos, dentro del marco de referencia del Proyecto EVALEF . A través de una revisión bibliográfica a nivel nacional e internacional sobre la temática abordada y tras un proceso de síntesis y análisis de la información registrada, se define el constructo que sustenta el estudio. EEF y su clasificación (Autoritario, Democrático, Permisivo, Sobreprotec…

familiaestilos educativos familiaresinstrumentos de evaluaciónpracticas parentalesproceso de validaciónUNESCO::PEDAGOGÍA
researchProduct

Exploiting Data Analytics and Deep Learning Systems to Support Pavement Maintenance Decisions

2021

Road networks are critical infrastructures within any region and it is imperative to maintain their conditions for safe and effective movement of goods and services. Road Management, therefore, plays a key role to ensure consistent efficient operation. However, significant resources are required to perform necessary maintenance activities to achieve and maintain high levels of service. Pavement maintenance can typically be very expensive and decisions are needed concerning planning and prioritizing interventions. Data are key towards enabling adequate maintenance planning but in many instances, there is limited available information especially in small or under-resourced urban road authorit…

feature importancepavement management systemComputer science0211 other engineering and technologiespavement maintenance decision02 engineering and technologypavement management systemslcsh:Technologylcsh:ChemistryGoods and services021105 building & construction0502 economics and business11. SustainabilitySettore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials Scienceroad asset databasesInstrumentationlcsh:QH301-705.5Fluid Flow and Transfer Processes050210 logistics & transportationbusiness.industryLevel of servicelcsh:TProcess Chemistry and TechnologyDeep learning05 social sciencesGeneral EngineeringPavement managementdeep learningTimelinedata mininglcsh:QC1-999Computer Science Applicationsroad asset databaseWorkflowRisk analysis (engineering)lcsh:Biology (General)lcsh:QD1-999lcsh:TA1-2040Key (cryptography)Settore ICAR/17 - DisegnoArtificial intelligencepavement maintenance decisionsbusinesslcsh:Engineering (General). Civil engineering (General)Predictive modellinglcsh:PhysicsApplied Sciences
researchProduct

Cladding-Pumped Er/Yb-Co-Doped Fiber Amplifier for Multi-Channel Operation

2022

The Institute of Solid State Physics, University of Latvia, as a Center of Excellence, has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART2. We express our gratitude to rer. nat. Nicoletta Haarlammert from Fraunhofer Institute for Applied Optics and Precision Engineering IOF for the refractive index measurements of ytterbium/erbium-co-doped fibers. This work is supported by the European Regional Development Fund project No. 1.1.1.1/18/A/068.

fiber-optic systemsabsorption and emission spectra:NATURAL SCIENCES::Physics [Research Subject Categories]overlap factorRadiology Nuclear Medicine and imagingerbium/ ytterbium co-dopingwavelength division multiplexingInstrumentationcladding-pumped doped fiber amplifierAtomic and Molecular Physics and Opticsabsorption and emission spectra; cladding-pumped doped fiber amplifier; erbium/ytterbium co-doping; fiber-optic systems; overlap factor; wavelength division multiplexingPhotonics
researchProduct