The data presented here are from one of the first quantitative research articles on the topic, published in the the lancet in 1975. one-hundred and twenty-four children living near a lead-emitting smelter in el paso, texas were studied for two years. various tests were used to assess neurological responses, including standing on one foot, tandem walking, alternate tapping, tapping with a stylus, visual reaction time, and auditory reaction time. wechsler intelligence tests were also administered. the investigators compared results between children with high blood level concentration and matched ‘control’ children with low blood level concentration. the data set is lead. csv

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?