Search results for "reliability"
showing 10 items of 1563 documents
Swine flu in Buenos Aires: beyond the principle of resilience
2011
PurposeThroughout April/May of 2009 a new type of virus surfaced in Mexico and the USA, denominated H1N1 or swine flu, that has been immediately disseminated worldwide. Even though the mortality of this virus has been slow, comparing with other antecedents, the mass‐media articulated a troublesome discourse that put the world in tenterhooks waiting for the evolution of the symptoms. Emulating the mythical archetype of what we knew as Spanish flu, which affected more than 50 million people during 1918 and 1920, journalism triggered panic in the four corners of the world. Under such a context, the purpose of this paper is to explore the connection between the coverage of mass‐media and press …
Developing empowering health counseling measurement
2006
Abstract Objective This article describes the derivation of an instrument (Empowering Speech Practices Scale) for assessing the empowerment of dyadic counseling, the evaluation of the validity and reliability of the ESPS and the results acquired with the instrument from hospital counseling. Methods ESPS was constructed on the basis of empowerment theory and foregoing conversation analytic research. Nurses and patients assessed the same counseling session by way of parallel statements. Structure and reliability of the scale were evaluated with Cronbach alpha, percentage of agreement, factor analysis and logistic regression analysis. Results According to these preliminary results, ESPS descri…
Fragebogen zur Messung der psychosozialen Belastungen bei chronisch-entzündlichen Darmerkrankungen (FBCED): Konstruktion und Evaluation
2002
The "Inflammatory Bowel Disease Stress Inventory (IBD-SI)" measures a broad spectrum of disease-specific every day stress factors in patients with inflammatory bowel disease (IBD). Based on a multistage factor analysis on 300 CED patients, the final form comprises 32 items assigned to 8 different domains: depressed mood, doctor-patient relationship, anxiety about loss of bowel control, occupational impairment, worries about deteriovation, stress from medical treatment, impairment of sexuality/partnership and physical complaints. In addition, a global stress score can be obtained. The reliability values of the 8 subscales with 4 items each indicate a good internal consistency (alpha = 0.76 -…
Psychosocial safety climate: Conceptual distinctiveness and effect on job demands and worker psychological health
2012
Abstract Psychosocial safety climate is an emerging construct that refers to shared perceptions regarding policies, practices, and procedures for the protection of worker psychological health and safety. The purpose of the research was to: (1) demonstrate that psychosocial safety climate is a construct distinct from related climate measures (i.e., physical safety climate, team psychological safety, and perceived organizational support); and (2) test the proposition that organizational psychosocial safety climate determines work conditions (i.e., job demands) and subsequently worker psychological health. We used samples from two different cultures; an Australian sample (N = 126 workers in 16…
Life Cycle Assessment of repurposed electric vehicle batteries: an adapted method based on modelling energy flows
2018
Abstract After their first use in electric vehicles (EVs), the residual capacity of traction batteries can make them valuable in other applications. Although reusing EV batteries remains an undeveloped market, second-use applications of EV batteries are in line with circular economy principles and the waste management hierarchy. Although substantial environmental benefits are expected from reusing traction batteries, further efforts are needed in data collection, modelling the life-cycle stages and calculating impact indicators to propose a harmonized and adapted life-cycle assessment (LCA) method. To properly assess the environmental benefits and drawbacks of using repurposed EV batteries …
Simulation of parasitic effects on Silicon Carbide devices for automotive electric traction
2020
Wide Band Gap (WBG) semiconductors are increasingly addressed towards Electric Vehicle (EV) applications, due to their significant advantages in terms of high-voltage and low-losses performances, suitable for high power applications. Nevertheless, the packaging in WBG devices represents a challenge for designers due to the notable impact that inductive and capacitive parasitic components can bring in high switching frequency regime in terms of noise and power losses. In this paper, a comparison between conventional Silicon (Si) and emerging Silicon-Carbide (SiC) power switching devices is presented. The effects of inductive parasitic effects and switching frequency are investigated in simul…
Volatile Compounds in Red Wines Processed on an Industrial Scale by Short Pre-fermentative Cold Maceration
2012
Nero d’Avola and Shiraz grapes were subjected to pre-fermentative cold maceration at 4°C for about 24 h in industrial winemaking, in order to evaluate the effects of the pre-treatment on aroma profile. The volatile compounds were identified by gas chromatography-mass spectrometry and grouped into 14 chemical families 4 and 9 months after bottling. Principal components analysis (PCA) plots of the volatile compounds showed clear separation among wines from the Shiraz and Nero d’Avola varieties. For instance, Shiraz wines were characterized along the PC1 axe by esters of organic acids, norisoprenoids and C6 alcohols, while Nero d’Avola wines were characterized by acetates and monoterpenic oxid…
Economic Robustness Analysis of Adaptive Chart Schemes for Monitoring the Total Nonconformities Number in Inspection Units
2015
In recent years, a variety of enhanced schemes for the c chart have been developed aimed at the effectiveness improving of the related statistical process control (SPC) procedures. However, the performance of such chart schemes can be very sensitive to values assumed for some operating and cost parameters, in particular to the considered process shift magnitude arising from out-of-control conditions. In such a circumstance, the effectiveness of such chart schemes can be subjected to substantial reductions when they are implemented in operative contexts given that, in practice, such value is unknown and it can be very difficult to accurately estimate. For this reason, in the present paper i…
A Multi-Objective Design Approach for the c Chart Considering Taguchi Loss Function
2013
The present paper proposes a multi-objective design approach for the c chart, considering in the optimization process of the chart parameters both the statistical and the economic objectives. In particular, the minimization of the hourly total quality related costs is the considered objective to carry out the economic goal, whereas the statistical objective is reached by the minimization the out-of-control average run length of the chart. A mixed integer non-linear constrained mathematical model is formulated to solve the treated multi-objective optimization problem, whereas the Pareto optimal frontier is described by the e-constraint method. In order to show the employment of the proposed …
Comparing the Economic Effectiveness of Various Adaptive Schemes for the c Chart
2013
In an attempt to improve the effectiveness of statistical process control (SPC) procedures, a variety of adaptive schemes has been developed in the last decades. However, considering control charts for attributes, relatively few works about adaptive schemes have been proposed, and most of them were proposed only recently. The common characteristic of those schemes is that one or more chart parameters are allowed to adaptively vary during the SPC operations according to the sampling information history, typically the current point plotted on the chart. In this way, the adaptive schemes are smarter than the related static ones, but they are also more complicated in terms of implementation. Th…