Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Nippon Pillar Packing Co., Ltd.

Masatoshi Sasaki

Isao Kidoguchi

Koji Morikawa

Toru Takayama

Akira Nakatsu

Tomoya Satoh

Koichi Ikemoto

Satoshi Kanai

Koichi Hayakawa

Tatsunari Koyama

Tomomi Honda

Yasuteru Asakawa

Shinya Nagahata

Satoshi Ootsuka

Tomoyuki Kato

An oil condition determination system includes a resistance value measurement unit and a determination unit. The resistance value measurement unit applies a measurement voltage between a pair of measurement electrodes in contact with oil to measure a resistance value of the oil. The determination unit determines, when a change tendency of the resistance value of the oil is reversed, that condition of the oil is changed.

Oil condition determination system, oil condition determination method, and oil condition determination program

A blood pressure estimation apparatus includes: a pulse wave measurement unit measuring a user's pulse wave signal; an electrocardiogram signal measurement unit measuring a user's electrocardiogram signal; and a processing circuit estimating a user's blood pressure value by using the pulse wave and electrocardiogram signals, wherein the processing circuit (a) acquires a pulse wave signal feature by using the pulse wave signal, (b) acquires an electrocardiogram signal feature by using the electrocardiogram signal, (c) acquires a pulse wave propagation time by using the pulse wave and electrocardiogram signals, (d) selects a blood pressure group indicating a relationship between a pulse wave propagation time and blood pressure of the user by using the pulse wave signal feature, electrocardiogram signal feature, and pulse wave propagation time, and (e) estimates the blood pressure value by using the blood pressure group, pulse wave signal feature, electrocardiogram signal feature, and pulse wave propagation time.

Blood pressure estimation apparatus, blood pressure estimation method, and non-transitory computer-readable recording medium

A semiconductor laser device includes an n-type clad layer, an active layer, and a p-type clad layer having a ridge and wing regions. The wing regions are provided with a first trench present on one side of the ridge and a second trench provided on the other side thereof being interposed therebetween. A reflectivity Rf at a front end face of a resonator, a reflectivity Rr at a rear end face of the resonator, a minimum value Wof a width of the first trench in a region adjacent to the front end face, a minimum value Wof a width of the second trench in the region adjacent to the front end face, a width Wof the first trench at the rear end face, and a width Wof the second trench at the rear end face satisfy Rf&#x3c;Rr, W&#x3c;Wand W&#x3c;WA width Wf of the ridge at the front end face, and a width Wr of the ridge at the rear end face satisfy Wf&#x3e;Wr. The ridge includes a region where a width decreases with distance from the front end side toward the rear end side.

Semiconductor laser device

Growing community of inventors

Osaka, Japan

Masatoshi Sasaki