29 research outputs found
Learning Curves and p-charts for a preliminary estimation of asymptotic performances of a manufacturing process
This paper presents a method for a preliminary estimation of asymptotic performances of a manufacturing process based on the knowledge of its learning curve estimated during the setting up of p-chart. The main novelties of the method are the possibility of estimating the asymptotic variability of a process and providing a simple approach for evaluating the period of revision of process control limits. An application of the method to a real example taken from the literature is also provided
Rapid determination of surfactant critical micelle concentrations using pressure-driven flow with capillary electrophoresis instrumentation
Influence of ecdysterone, precocene and compounds with juvenile hormone activity on induction, termination and maintenance of diapause in the parasitoid wasp, Nasonia vitripennis
Organization, replication and modification of the human genome: Temporal order of synthesis and methylation of two classes of HeLa nDNA separated in Ag+?Cs2SO4 gradients
Walking mediates associations between neighborhood activity supportiveness and BMI in the Women's Health Initiative San Diego cohort
OBJECTIVES: To investigate whether walking mediates neighborhood built environment associations with weight status in middle- and older-aged women. METHODS: Participants (N=5085; mean age=64±7.7; 75.4% White non-Hispanic) were from the Women’s Health Initiative San Diego cohort baseline visits. Body mass index (BMI) and waist circumference were measured objectively. Walking was assessed via survey. The geographic information system (GIS)-based home neighborhood activity supportiveness index included residential density, street connectivity, land use mix, and number of parks. RESULTS: BMI was 0.22 units higher and the odds ratio for being obese (vs. normal or overweight) was 8% higher for every standard deviation decrease in neighborhood activity supportiveness. Walking partially mediated these associations (22–23% attenuation). Findings were less robust for waist circumference. CONCLUSIONS: Findings suggest women who lived in activity-supportive neighborhoods had a lower BMI than their counterparts, in part because they walked more. Improving neighborhood activity supportiveness has population-level implications for improving weight status and health