Michael angelasTro, p.e., pToe inTroducTion The objective of this paper is to establish that vehicle speeds and crash rates at modern roundabouts in the United States are related to driver sight distance. This paper investigated the relationship between driver sight distance and passenger vehicle speeds and vehicle crash rates at roundabouts in the United States based on data collected at 26 si...

background: prevalence of obesity in children has been increasing during recent decades all over the world. obesity, particularly central obesity, is associated with metabolic syndrome and cardiovascular diseases. the present study aimed to assess obesity and central obesity in 6-11 year old birjand elementary school children, east of iran. methods: this cross-sectional study was conducted on 1...

Traditional inferential procedures often fail with censored and truncated data, especially when sample sizes are small. In this paper we evaluate the performances of the double and single bootstrap interval estimates by comparing the double percentile (DB-p), double percentile-t (DB-t), single percentile (B-p), and percentile-t (B-t) bootstrap interval estimation methods via a coverage probabil...

We propose the percentile curves concept as conditional probabilities curves across representative percentiles of the distribution of curves induced by random effects in a logistic model with random intercepts. We extend this concept to a logistic model with random intercepts and slopes and propose a methodology to approximate the percentile curves using the Monte-Carlo technique. We apply this...

Elevated nutrients and sediments are the main factors contributing to the poor biological condition measured in over 40% of US waters, highlighting the need for criteria that can aid management efforts to protect or restore the quality of US waters. A large amount of literature on nutrient criteria has been generated since the USEPA called for their development in 1998. Our objective was to exa...

background: childhood obesity could induce some risk factors for cardiovascular disease (cvd) including serum lipid abnormalities, hypertension, and atherosclerosis. the present study aimed to comparison the lipid profile in normal children with cases having overweight, obesity and central obesity . methods : i n this case control study , which was conducted 2013 , serum lipids for three groups...

PURPOSE The purposes of this study were to determine if young children with rampant dental caries that received complete dental rehabilitation under general anesthesia: 1.) weighed less preoperatively compared to national norms; and 2.) demonstrated significant improvement postoperatively in percentile weight gain and/or quality of life indicators. METHODS The preoperative and postoperative p...