Olympus Optical Company, Ltd.

Nec Corporation

Sharp Kabushiki Kaisha Corporation

The University of Tokyo

Hoechst Japan Limited

Toru Nakamura

Yoshiharu Yamamoto

Motoki Sone

Keiji Toriyama

Makoto Murata

Zbigniew Struzik

A body motion detection section () for continuously detecting the frequency of a user's activity as an activity level is provided. The activity level detected by the body motion detection section () is outputted to a fatigue detection section () for estimating a user's fatigue level on the basis of the activity level.

Fatigue estimation device and electronic apparatus having the fatigue estimation device mounted thereon

Improved process for producing a polybenzimidazole compound in solution by dissolving a fully dried polybenzimidazole of the following general formula (1) or (2) in N,N-dimethylacetamide of a sufficiently reduced water content at an elevated temperature of 260.degree. C. or higher in an inert gas atmosphere and a solution of the polybenzimidazole compound produced by the process. The solution remains useful for an extended time without using metal salts or any other stabilizers: ##STR1## where R.sup.1, R.sup.2 and R.sup.5 are tetra-, di- and trivalent aromatic groups, respectively; R.sup.3, R.sup.4 and R.sup.6 are each independently a hydrogen atom, an alkyl group or an aryl group; n is an integer of 2 or more.

Polybenzimidazole compounds in solution and a process for the

A semiconductor device has a plurality of chip regions each having semiconductor elements disposed therein and a plurality of electrode pads disposed on a surface thereof. The chip regions are separated and defined by scribing line regions. A plurality of dummy pads are disposed in the scribing line regions for use in positioning the electrode pads upon wafer probe test. The dummy pads are disposed in diagonally opposite positions across each of the chip regions one on each side of the each of the chip regions.

Semiconductor device

A lens system for optical recording type disks comprising a first and second lenses wherein the first lens is a positive lens and the second lens is a positive lens, the lens system being arranged that at least one of the exit surface of the first lens and respective surfaces of the second lens is formed as an aspherical surface, the lens system being small in size and light in weight and having a long working distance and favorably corrected aberrations.

Lens system for optical recording type disks

A compact and light-weight lens system for optical recording type disks comprising only one lens element and arranged to have favorably corrected aberrations and a long working distance by forming both surfaces of the lens element as aspherical surfaces.

A lens system for optical recording type disks comprising a first lens and a second lens wherein the first lens is a positive lens and the second lens is a positive lens, the lens system for optical recording type disks being arranged that the entrance surface of the first lens is an aspherical surface, the working distance is long and aberrations are corrected favorably.

Growing community of inventors

Tokyo, Japan

Toru Nakamura