Search results for "SAMPLE"
showing 10 items of 2270 documents
Blood absorption capacity of different xenograft bone substitutes. An in-vitro study
2019
Background Commercially available xenograft blocks, claim to have adequate characteristics to interact with biological media and thus permitting biological fluid absorption. The objective of this in vitro study was to compare the blood absorption capacity of four different xenograft block materials of different composition of collagen and porosity. Material and Methods Four brands of xenograft block materials were used (NuOss®, Bio-Oss®, Osteobiol® and Smartbone®). Five samples of each brand were analyzed, making a total of 20 tests. Human blood was used as the absorption liquid for the present experiment. The time period, in which the block remains in contact with the blood, was registered…
Validation of a Modified Version of the Psychological Capital Questionnaire (PCQ12) in Spain
2018
Background : Previous studies have found some limitations and inconsistencies in the functioning of the short Psychological Capital Questionnaire (PCQ12), suggesting the need to improve it. The objective of the current study is to validate a modified version of the PCQ12 in Spain. Method : The sample consists of 792 employees from 42 Spanish organizations. A cross-validation was carried out to test the factorial validity of the modified scale. Reliability and convergent, discriminant, and criterion validity were also tested. Results : The modified PCQ12 showed good psychometric qualities. A four-factor structure showed a better fit to the data than the original second-order structure. Conc…
Protective ventilation with high versus low positive end-expiratory pressure during one-lung ventilation for thoracic surgery (PROTHOR): study protoc…
2018
Postoperative pulmonary complications (PPC) may result in longer duration of in-hospital stay and even mortality. Both thoracic surgery and intraoperative mechanical ventilation settings add considerably to the risk of PPC. It is unclear if one-lung ventilation (OLV) for thoracic surgery with a strategy of intraoperative high positive end-expiratory pressure (PEEP) and recruitment maneuvers (RM) reduces PPC, compared to low PEEP without RM.PROTHOR is an international, multicenter, randomized, controlled, assessor-blinded, two-arm trial initiated by investigators of the PROtective VEntilation NETwork. In total, 2378 patients will be randomly assigned to one of two different intraoperative me…
Un estudio sobre la praxis docente del violonchelo en los conservatorios profesionales de la provincia de Valencia / A study about the practice of te…
2016
El presente estudio tiene como objetivo conocer la metodología empleada en la especialidad de violonchelo en los conservatorios de enseñanzas profesionales de la provincia de Valencia. El instrumento de recogida de la información ha sido el cuestionario y la muestra ha estado formada por 34 profesores de 22 conservatorios. Se ha empleado una metodología de complementación, tanto cualitativa como cuantitativa. Los resultados muestran que a pesar de existir algunas coincidencias en la forma y herramientas de trabajo, cada profesor aplica su propia metodología adaptada a las necesidades y características de cada alumno.
Analysis of toxic elements in plastic components for toys. Multi-elemental determination by x-ray fluorescence
1993
Abstract An x-ray fluorescence method is proposed for the multi-elemental determination of toxic elements in plastic articles for children, viz., Sb(III), Ba, Cd, Cr(III), Hg, Pb and As(III). Mineralization is achieved by using molten sodium hydroxide to decompose the organic matrix, with sodium nitrate as auxiliary oxidant. Stable solutions containing the chemical species for analysis are obtained. The species are separated from the solution by (co)precipitation, in a medium of NH+4-NH3 buffer (pH 8.5) with sodium diethyldithiocarbamate, sodium rhodizonate and Fe3+, which acts as a carrier. The precipitates deposited on filter-paper are placed in the x-ray spectrometer in fine layer morpho…
Psychometric properties of the parental bonding instrument in a Spanish sample.
1993
The Parental Bonding Instrument was translated into Spanish and administered to a sample of 205 Spanish primiparae 3 days after childbirth. Reliability, factorial structure and predictive validity for affective disorders were evaluated. The Spanish version of the PBI has psychometric features similar to those described in other cultures. However, the results suggest that in future research the predictive power of the “Control” factor in affective disorders might be improved by splitting it into two subfactors: “Overprotection” and “Restraint”.
Nuevas herramientas y nuevas ideas para los responsables de recursos humanos. Validez estructural y predictiva del cuestionario de satisfacción ponde…
2013
One of the fundamental tasks for an Human Resource Management (HRM) practitioner consists in designing a reward system that can be broadly understood and can influence the attitudes and, subsequently, the behavior of individuals to permit achievement of organizational objectives. To do so, appropriate tools are necessary to allow key actions to be identified in terms of motivating employees; thereby, avoiding opportunistic costs derived from allocating resources needed to close the gap in employee satisfaction, with regard to non-priority factors for workers in satisfying their own personal needs. This article, thus, presents a dual assessment scale consisting of 44 items, categorized into …
Validation of a measure of Service Climate in organizations
2012
El Clima de Servicio resulta crítico en organizaciones del sector servicios. Refleja la importanciaque las organizaciones atribuyen a la calidad del servicio así como los esfuerzos para complacer a los clientes. Considerando el trabajo de Schneider, White y Paul (1998) como punto de partida, este trabajo valida una medida del clima de servicio en español. Para ello se han desarrollado dos estudios de campo. Un total de 120 hoteles, ubicados en España, participaron en la investigación. La muestra estuvo conformada por 508 empleados de hoteles distribuidos en 152 unidades de trabajo. Nuestros resultados confirmaron que la validez de constructo y predictiva son satisfactorias, con cuatro facto…
Validating justice climate and peer justice in a real work setting
2016
In this study we tested the validity of justice climate and peer justice, measured as second-order constructs, in a real work setting. First, we investigated the appropriateness of aggregating first-order facets of justice climate and peer justice to work-unit level of analysis. Second, we examined the construct validity of justice climate and peer justice as two different factor structures. Third, we tested the hierarchical structure of justice climate and peer justice as second-order factors. Finally, we examined the predictive validity of second-order factors justice climate and peer justice within a nomological network composed of reciprocity with the supervisor and reciprocity with cow…
The predictive and incremental validity of the German adaptation of the Static-2002 in a sexual offender sample released from the prison system
2015
Purpose The aim of this study was to examine the predictive validity of the German adaptation of the Static-2002 and to compare it with the results of the Static-99. Method The predictive validity of Static-2002 was investigated in a sample of n = 452 sexual offenders released from the Austrian Prison System. The instrument was coded retrospectively using file information. Afterwards, the predictive estimates of the Static-2002 were related to officially documented reconviction data. Results The Static-2002 was found to have large effect sizes for predicting sexual, violent, and general recidivism (area under the receiver operating characteristic curve [AUC] = .78, .75, .75, respectively) f…