Search results for " Reliability."
showing 10 items of 551 documents
Empowering leadership, mindful organizing and safety performance in a nuclear power plant: A multilevel structural equation model
2020
Abstract The aim of this paper is to develop and test a model in which empowering leadership is expected to contribute to developing mindful organizing, which in turn should contribute to safety compliance and safety participation. Empowering leadership was measured at Time 1, and the rest of the variables were measured two years later (Time 2). The sample used for the analyses in this study included 49 teams and 200 employees from a company in the nuclear generation industry with three different sites. The multilevel structural equation analysis performed to test the proposed model revealed an acceptable fit, and most of the paths were statistically significant and presented the expected s…
Validity and Reliability of a Single Question for Leisure-Time Physical Activity Assessment in Middle-Aged Women.
2020
Purpose: To investigate the validity and test–retest reliability of a single seven-level scale physical activity assessment question (SR-PA L7) and its three-level categorization (SR-PA C3). Methods: The associations of SR-PA L7 and C3 with accelerometer-measured leisure-time physical activity (ACC-LTPA) and with the results of four different physical performance tests (6-min walk [n = 733], knee extension [n = 695], vertical jump [n = 731], and grip force [n = 780]) were investigated among women aged 47–55 years participating in the Estrogenic Regulation of Muscle Apoptosis study (n = 795). The reliability was studied using Spearman correlations with 4-month test–retest period (n = 152). R…
Assessing learners’ writing skills in a SLA study: Validating the rating process across tasks, scales and languages
2014
There is still relatively little research on how well the CEFR and similar holistic scales work when they are used to rate L2 texts. Using both multifaceted Rasch analyses and qualitative data from rater comments and interviews, the ratings obtained by using a CEFR-based writing scale and the Finnish National Core Curriculum scale for L2 writing were examined to validate the rating process used in the study of the linguistic basis of the CEFR in L2 Finnish and English. More specifically, we explored the quality of the ratings and the rating scales across different tasks and across the two languages. As the task is an integral part of the data-gathering procedure, the relationship of task p…
Diseño y fiabilidad de un cuestionario sobre la comprensión auditiva/audiovisual
2021
Este trabajo forma parte de una investigación mixta multifase que explora el empleo de preguntas de comprensión audiovisual integradas en el vídeo en forma de subtítulos y sincronizadas con los fragmentos pertinentes para el aprendizaje de lenguas extranjeras. El objetivo principal del artículo es comunicar el diseño y la fiabilidad test-retest de un cuestionario sobre la comprensión auditiva/audiovisual para estudiantes adultos de español como lengua extranjera que sería administrado en estudios posteriores. Además, se analizan las respuestas de los informantes para conocer algunas de sus creencias y preferencias. Veinte aprendientes completaron el cuestionario en dos ocasiones con un inte…
Load capacity and deflection of fire-resistant steel beams
1990
The methodology of defining safety of constructions in fire has not yet been sufficiently verified and agreed upon. This paper includes calculation results for steel beams, which prove that the ultimate load-bearing capacity predicted by plastic design theory, which is valid in engineering calculations, is not sufficient for determining the critical temperature. The reason is that this temperature tends to be limited in some cases by large deflections of beams in fire.
Analysis of a Collapsed Long-Span Reinforced Concrete Roof in South Italy: Design Mistakes and Material Degradation
2020
In 2004, during ordinary maintenance work, consisting of waterproofing a building located in the south of Italy, the long-span (14.5 m) in situ RC roof partially collapsed. The building, constructed in 1950, was in service as a cinema until 1967 and then utilized as a school until 1985. Lastly, it was a hotel until 2000. In 2004, when the building was not in service and was undergoing maintenance work, it partially collapsed under dead load. After the collapse, which involved a large portion of the roof, several beams, and two columns, the Italian court nominated an official technical consultant to investigate the direct and related causes of the failure. After the main causes were identifi…
Excessive Deflection in Long-Span Timber Beams of a Historical Building in the South of Italy: Analysis and Retrofitting Design
2020
AbstractIn 2018, under service conditions, excessive deflections were observed in the long-span timber beams of the first floor of the former Sant’Elisabetta Monastery in Palermo (Italy). The build...
The power of empowering team leadership over time: A multi-wave longitudinal study in nuclear power plants
2021
Abstract Team attitudes in critical infrastructures are essential to achieving reliable operations despite internal and external challenges, and empowering team leadership (ETL) may be an important precursor of these attitudes. The present study aimed to test whether ETL was related to teams’ satisfaction trajectories, measured as changes in job satisfaction and safety satisfaction at three time points. Hypotheses were tested in a sample of 48 teams from two Spanish nuclear facilities in three different waves (2008, 2011, and 2014). Growth Modeling using hierarchical linear models with SPSS 20.0 revealed that ETL was positively related to initial levels of teams’ job and safety satisfaction…
Non linear and linearized combination coefficients for modal pushover analysis
2017
Current design practice and seismic codes tend to assess seismic demand of buildings by Non linear Static Analysis (NSA), based on the evaluation of the pushover curve. Earlier non-linear static analysis procedure estimate the response peak value by evaluating the push-over curve adopting a distribution of invariant forces proportional to the fundamental vibration mode. In order to include the effect of higher modes several multimodal push-over analysis procedures were proposed in literature. In In the most famous of these, namely Modal Pushover Analysis (MPA), nodal response peak values are obtained by combination of "modal" responses by the traditional SRSS or CQC methods: the use of the …
Microcirculatory Assessment of Arterial Below-Knee Stumps: Near-Infrared Spectroscopy Versus Transcutaneous Oxygen Tension—A Preliminary Study in Pro…
2017
International audience; Objective: To examine metrologic properties of near-infrared spectroscopy (NIRS) versus transcutaneous oxygen tension (TcPO2) for micro-circulatory assessment of vascular transtibial stumps at the stabilized period of prosthesis fitting, as a preliminary step before exploring its ability to predict stump healing, considering the previously identified limits of TcPO2 (borderline area between 15 and 35mmHg).Design: Prospective single-center observational study.Setting: University-based rehabilitation center.Participants: Individuals with unilateral transtibial amputation for peripheral artery disease, at the definitive stage of prosthesis fitting, able to perform a 2-m…