Objective: To estimate the prevalence of chronic obstructive pulmonary disease (COPD) phenotypes in the province of Leon. Methods: Multicenter epidemiological cross-sectional study (30 health centers in the province of Leon). It included patients older than 35 years diagnosed and treated for COPD. Study variables: age, sex, habitat, anthropometric data, smoking, postbronchodilator spirometry, ...

The failure mode and effects analysis (FMEA) is a widely used analytical technique that helps to identify and reduce the risks of failure in a system, component, or process. One important issue of FMEA is the determination of the risk priorities of failure modes. Risk ranking is produced in order to prioritize the focus on each of the failure modes that are identified. In this study, we applied...

Critical aircraft systems are becoming more dependent on software. This brings with it the need to establish that the software will perform safely and reliably through all flight regimes, including emergencies. Verification and validation (V&V) is a key process for meeting that need for both military and civil procurements. For software developed with the UML (Unified Modeling Language), we are...

Abstract The South-to-North Water Diversion Project (SNWDP) is a cross-basin large-scale water infrastructure, whose operational management faces many complex risks. This study constructs an safety risk analysis model based on fuzzy VIKOR-FMEA. First, the expert team used linguistic variables to evaluate severity of each failure mode (S), frequency occurrence (O), and difficulty detection (D) i...

PURPOSE A failure mode and effect analysis (FMEA) of skin lesions treatment process using Esteya™ device (Elekta Brachyterapy, Veenendaal, The Netherlands) was performed, with the aim of increasing the quality of the treatment and reducing the likelihood of unwanted events. METHODS A multidisciplinary team with experience in the treatment process met to establish the process map, which outlin...

separation system is one of the most important systems in rockets. the influence of this system on mission success cannot be ignored. in this paper, reliability of a sounding rocket separation system is determined using block diagram and fmea . this system is based on the flexible linear shape charge cross-section and a spring mechanism to accelerate separation. in this investigation, the relia...