Abstract: A self-position estimation system for a mobile body, includes: a first self-position estimation unit that estimates a first self-position in a first coordinate system by using a first positioning sensor mounted on the mobile body; a second self-position estimation unit that estimates a second self-position in a second coordinate system by using a second positioning sensor mounted on the mobile body; a self-position convert unit that converts the first self-position estimated by the first self-position estimation unit and expressed in the first coordinate system into an expression format in the second coordinate system; and a self-position correction unit that corrects the first self-position converted into an expression format in the second coordinate system using correction information map data that stores, as correction information, a positional deviation amount of a recording point in a real space expressed in the first coordinate system with respect to the second coordinate system.

Abstract: A composite organic filament comprises an organic resin matrix and extrafine inorganic fiber-like segments having a diameter of 1 .mu.m or less and uniformly distributed throughout the organic resin filament matrix. The composite filament has a diameter of 3 to 500 .mu.m, and the fiber-like segments comprise carbon fibers produced by a vapor phase growth process and potassium titanate whiskers.