Abstract: A moving body monitoring apparatus for examining whether a moving body includes communication means or not or examining whether the moving body has particular information or not.

Abstract: Melt-spun polyester fibers are taken up in the absence of heat at a speed of 5,000 to 6,000 m/min under conditions that satisfy the following relations (IX) and (X), subsequently heat-treating the fibers for a period of from 0.01 to 0.05 seconds with a heating roller while the length of the melt-spun fibers is held constant with no drawing step being provided between the taking up and heat treatment steps, and finally winding up the heated fibers0.04.ltoreq.L/(SSxd).ltoreq.0.08 (IX)1.0.ltoreq.To.ltoreq.1.5 (X)where L is the distance (cm) between the spinneret and the convergence point, SS is the speed (m/min) of a take up roller, To is the spinning tension (g/d) at a point immediately after the convergence point and D is the filament fineness (d) of the fiber wound up and is within the range of from 1 to 3 d.

Abstract: A polyester fiber and process embodiments for the production thereof are described, wherein the polyester fiber is produced by high-speed spinning and is characterized by a filament fineness of from 1 to 3 d, a strength of at least 4.0 g/d, an elongation of up to 40%, a crystallinity (X.rho.) of from 40 to 55%, a birefringence of from 140.times.10.sup.-3 to 165.times.10.sup.-3, an orientation function of from 0.36 to 0.45 in the amorphous portion, and a thermal shrinking stress that satisfies the relations1.1.ltoreq.ST.sub.200 /ST.sub.100 .ltoreq.2.0 (I)and50.ltoreq.ST.sub.max .ltoreq.180 (II),where ST.sub.100 is the shrinking stress (mg/d) at 100.degree. C., ST.sub.200 is the shrinking stress (mg/d) at 200.degree. C., and ST.sub.max is a peak stress (mg/d) on a thermal shrinking stress curve.