Search results for "VALIDATION"

STRATEGIC NEED PERSPECTIVE TO STRATEGIC ALLIANCE FORMATION: A THEORETICAL CONSTRUCTION AND EMPIRICAL VALIDATION

2011

The role of prognostic stratification on prescription of anticoagulants in older patients with atrial fibrillation : a multicenter, observational, pr…

2022

Background: Literature suggests that different risks of mortality could influence physicians in prescribing or not anticoagulants in older patients with atrial fibrillation (AF). The Multidimensional Prognostic Index (MPI) can be considered a tool for the detection of multidimensional frailty. The aim of this cross-sectional study was to evaluate whether prescription patterns of oral anticoagulants exist, based on MPI values. Methods: Older hospitalised patients (age >= 65 years) with non-valvular AF were included across 24 European centres. MPI was calculated using validated and standardised tools derived from a comprehensive geriatric assessment. Other functional and clinical information …

A Critical Comparison of Remote Sensing Leaf Area Index Estimates over Rice-Cultivated Areas: From Sentinel-2 and Landsat-7/8 to MODIS, GEOV1 and EUM…

2018

Leaf area index (LAI) is a key biophysical variable fundamental in natural vegetation and agricultural land monitoring and modelling studies. This paper is aimed at comparing, validating and discussing different LAI satellite products from operational services and customized solution based on innovative Earth Observation (EO) data such as Landsat-7/8 and Sentinel-2A. The comparison was performed to assess overall quality of LAI estimates for rice, as a fundamental input of different scale (regional to local) operational crop monitoring systems such as the ones developed during the "An Earth obseRvation Model based RicE information Service" (ERMES) project. We adopted a multiscale approach f…

Permanent Stations for Calibration/Validation of Thermal Sensors over Spain

2016

The Global Change Unit (GCU) at the University of Valencia has been involved in several calibration/validation (cal/val) activities carried out in dedicated field campaigns organized by ESA and other organisms. However, permanent stations are required in order to ensure a long-term and continuous calibration of on-orbit sensors. In the framework of the CEOS-Spain project, the GCU has managed the set-up and launch of experimental sites in Spain for the calibration of thermal infrared sensors and the validation of Land Surface Temperature (LST) products derived from those data. Currently, three sites have been identified and equipped: the agricultural area of Barrax (39.05 N, 2.1 W), the mars…

A carbon sink-driven approach to estimate gross primary production from microwave satellite observations

2019

Abstract Global estimation of Gross Primary Production (GPP) - the uptake of atmospheric carbon dioxide by plants through photosynthesis - is commonly based on optical satellite remote sensing data. This presents a source-driven approach since it uses the amount of absorbed light, the main driver of photosynthesis, as a proxy for GPP. Vegetation Optical Depth (VOD) estimates obtained from microwave sensors provide an alternative and independent data source to estimate GPP on a global scale, which may complement existing GPP products. Recent studies have shown that VOD is related to aboveground biomass, and that both VOD and temporal changes in VOD relate to GPP. In this study, we build upon…

Orthorexia Nervosa vs Healthy Orthorexia:Preliminary Results of the Italian Validation of the Teruel Orthorexia Scale (TOS)

2022

Knowledge Management in R&D Teams at a Spanish Technical University: Measurement and Relations with Organizational Culture

2015

The aim of this study was to create and analyze the psychometric properties of an instrument (Knowledge Creation and Dissemination Survey, KCD) to evaluate the knowledge management on Spanish R&D teams based on the Leonard-Barton’s (1995) model of knowledge flows. For this purpose, three different tasks were carried out: firstly analyzing the psychometric properties of the instrument; secondly, analyzing the knowledge management levels of the R&D teams at a technical university as well as the relationship between organizational culture and knowledge management. This instrument was developed to cover the existing gap in the evaluation of knowledge management. The “Knowledge Creation and Diss…

The shortened Corporate Ethical Virtues scale

2018

So far, the field of business ethics lacks validated measures for assessing virtues at the organizational level. The aim of this study is to investigate the measurement invariance of a shortened Corporate Ethical Virtues scale. In this manner, we contribute to validating an instrument that is both psychometrically sound and efficient to use. We conducted two survey studies of two independent groups (managers and school psychologists). Confirmatory factor analysis supported the eight‐factor model of the scale, and we found it to be invariant in two different occupational groups. The managers gave higher appraisals of ethical culture than the psychologists did in seven out of the eight dimens…

Development and validation of a scale to assess social entrepreneurship competency in Higher Education

2019

This paper proposes an instrument to assess social entrepreneurship competency in higher education (SECS). 19 Features of social entrepreneurship competency were identified. The pilot test (n = 497) confirmed the validity and reliability of the SECS. Exploratory factor analysis proposed a set of categories consistent with the initial approach. Confirmatory factor analysis showed acceptable relationships among the scale categories and items, while the fit indices suggested that the data fit adequately to the default model. Pearson’s test verified significant, positive correlations among the revised categories in all cases. Therefore, the scale carries the potential to contribute to social en…

Analysis of enniatins and beauvericin by LC-MS/MS in wheat-based products

2017

Due to the matrix complexity for wheat-based products, a comparative study of different rapid extraction procedures was performed for the extraction of enniatins (ENA, ENA1, ENB, ENB1) and beauvericin in flour, pasta, breakfast cereals, and biscuits. Three different approaches were studied during the extraction and purification steps (shaker, Ultra-Turrax, and QuEChERS) for each matrix. Liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) with electrospray source working in a positive mode was used. For the analysis of the five mycotoxins, the three methods were tested in terms of recovery, matrix effect, and sensibility, concluding that Ultra-Turrax extraction was the most …