Search results for "validation"
showing 10 items of 620 documents
Psychometric Properties Of A Questionnaire Measuring The Antecedents Of Entrepreneurship Education Intention
2017
A limit of the questionnaires measuring Entrepreneurial Intention (EI) is the lack of a multidimensional vision of its antecedents. The definition of a multidimensional model of the main drivers affecting the intentions of aspiring entrepreneurs in building a start-up seems a fundamental milestone to overcome this pitfall. This paper aims to explore the internal consistency reliability of a new multidimensional questionnaire measuring the antecedents of EI and Entrepreneurial Education Intention (EEI). The tool consists in a self-administered online questionnaire that has been built in accordance with the Theory of Planned Behavior in entrepreneurship research. It includes 54 items adapted …
A novel ensemble computational intelligence approach for the spatial prediction of land subsidence susceptibility.
2020
Land subsidence (LS) is a significant problem that can cause loss of life, damage property, and disrupt local economies. The Semnan Plain is an important part of Iran, where LS is a major problem for sustainable development and management. The plain represents the changes occurring in 40% of the country. We introduce a novel-ensemble intelligence approach (called ANN-bagging) that uses bagging as a meta- or ensemble-classifier of an artificial neural network (ANN) to predict LS spatially on the Semnan Plain in Semnan Province, Iran. The ensemble model's goodness-of-fit (to training data) and prediction accuracy (of the validation data) are compared to benchmarks set by ANN-bagging. A total …
Leisure time physical activity is associated with improved HDL functionality in high cardiovascular risk individuals: a cohort study.
2020
Abstract Aims Physical activity has consistently been shown to improve cardiovascular health and high-density lipoprotein-cholesterol levels. However, only small and heterogeneous studies have investigated the effect of exercise on high-density lipoprotein functions. Our aim is to evaluate, in the largest observational study to date, the association between leisure time physical activity and a range of high-density lipoprotein functional traits. Methods The study sample consisted of 296 Spanish adults at high cardiovascular risk. Usual leisure time physical activity and eight measures of high-density lipoprotein functionality were averaged over two measurements, one year apart. Multivariabl…
En torno al artículo 76.2 del código civil : Comentario a la sap barcelona núm. 21/2020, de 15 de enero
2021
Nullity of marriage due to the spouse´s mistake regarding a significant personal quality of her spouse (art. 73.4º CC) (transvestism). The validation itself requires a conjugal life ininterrupted for a year after the error´s disappearance
Calibration and Validation of Algorithms for the Estimation of Chlorophyll-A in Inland Waters with Sentinel-2
2018
The Ocean Color 2 (OC2), Ocean Color 3 (OC3) and Dall'Olmo three-band (TBDO) algorithms used for the estimation of the chlorophyll-a concentration [Chl-a] have been calibrated and validated for Sentinel-2 spectral bands. Measurements of in situ chlorophyll-a, radiometry and simulations with HydroLight have been used for this purpose within the Ecological Status of AQuatic Systems Satellites (ESAQS) Project to estimate water quality in aquatic systems in Spain. The results show that Sentinel-2 spectral bands are suitable for studying the chlorophyll-a concentration in inland waters. The TBDO algorithm have been applied to Sentinel-2 images and satisfactory results have been obtained in Albuf…
Validação de um questionário de satisfação sobre a formação prática de estudantes de enfermagem
2019
Objetivo: validar un instrumento para valorar la formación práctica y la satisfacción con las asignaturas de Practicum de los estudiantes de Enfermería. Método: estudio observacional, descriptivo, transversal (curso 2014-2015). Validación de un cuestionario autoadministrado y anónimo (17 ítems) de Satisfacción sobre el Practicum en Estudiantes de Enfermería, elaborado por consenso de ocho expertos en formación práctica (en tres sesiones de grupo nominal). Se realizó análisis factorial y confirmatorio, estimándose la consistencia interna para determinar su validez. Se calculó la satisfacción de los estudiantes en cada asignatura y en su totalidad. Resultados: 174 respuestas. Alta correlación…
The structure of Antonovsky's Orientation to Life Questionnaire
1998
The present study investigated the structure of Antonovsky's (1987) short-form (13-item) Orientation to Life Questionnaire (OLQ). The OLQ was developed to measure sense of coherence, which consists of three interrelated components: meaningfulness, comprehensibility and manageability. Confirmatory factor analyses were carried out using data on three occupational groups (technical designers n = 989, teachers n = 1012, managers n = 1035). The factor analysis models were specified and compared in the study: (1) a first-order one-factor model; (2) a first-order correlated-three-factor model; and (3) a second-order model with three first-order factors. The results suggested that the first-order c…
Experimental validation of optimisation strategies in hydroforming of T-shaped tubes
2008
For three dimensional tube hydroforming operations (i.e. T or Y shaped tubes) the calibration of both material feeding history and internal pressure path during the process is crucial and many approaches to such optimization were presented; the authors developed some procedures to optimize pressure paths and punch velocity histories with the application of an integrated method FEM - Gradient based optimization tools. In this paper, an experimental validation campaign of the utilized optimization strategies is presented with the aim to assess the effectiveness of the developed procedures. An optimization procedure (gradient based techniques) was applied on the process parameters leading to t…
Experimental characterization and comparison of TLIM performances with different primary winding connections
2017
Abstract This paper presents an experimental characterization and comparison of the performances achieved by a Tubular Linear Induction Motor (TLIM) prototype with different typologies of primary winding connections. More in detail, three different configurations have been considered, analyzed and discussed: full-pitch star, 5/6 shortened pitch star and 5/6 shortened pitch double star. For this purpose, an experimental test bench at the Sustainable Development and Energy Saving Laboratory (SDESLab), University of Palermo, Italy, has been set-up. The obtained results have allowed the identification of the best winding configuration for different applications intended for the motor. Moreover,…
Experimental validation of a distribution theory based analysis of the effect of manufacturing tolerances on permanent magnet synchronous machines
2017
An experimental study on the effect of permanent magnet tolerances on the performances of a Tubular Linear Ferrite Motor is presented in this paper. The performances that have been investigated are: cogging force, end effect cogging force and generated thrust. It is demonstrated that: 1) the statistical variability of the magnets introduces harmonics in the spectrum of the cogging force; 2) the value of the end effect cogging force is directly linked to the values of then remanence field of the external magnets placed on the slider; 3) the generated thrust and its statistical distribution depend on the remanence field of the magnets placed on the translator.