In the course of making high-accuracy measurements of arsenic, we found that the most recently published and compiled half-life of 76As did not agree with our data as well as the earlier accepted value. To redetermine this parameter, 76As sources were measured on four Ge gamma detector systems, and an exponential function was fitted to the decay data by two different nonlinear least-squares met...

In July 1935, 1 month before the slgnmg of t,lle Socd Security Act, the first government henlth msurance bill m us 111st,ory \Ins mtroduced m Congress Sponsored by Senator Arthur Capper of Kansas, the leglslatlon aould have provided compulsory protectlon on the State level for wrtually all Ameixnn ~nge-enmers It attracted llttle notlce, however, because It lacked the bnckmg of key leg’slators a...

Second solution: For any λ > 0, the map (x,y) 7→ (λx,λ−1y) preserves both areas and the hyperbola xy = 1. We may thus rescale the picture so that A,B are symmetric across the line y = x, with A above the line. As P moves from A to B, the area of APB increases until P passes through the point (1,1), then decreases. Consequently, P = (1,1) achieves the maximum area, and the desired equality is ob...