Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Kei Kuwabara"'
Publikováno v:
Micromachines, Vol 13, Iss 4, p 575 (2022)
Temperature elevation due to global warming increases the risks of dehydration, which can induce heat-related illness. Proper rehydration with appropriate amounts of water and electrolytes is essential to aid body fluid homeostasis. Wearable sweat se
Externí odkaz:
https://doaj.org/article/42f6c0fcf6a74898ab6f65219c5537b7
Publikováno v:
Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference. 2022
We have developed a lightweight heartbeat detection algorithm for electrocardiogram (ECG) measurement in consumer-grade wearable devices. Based on a principle of calculating the clearance height in the inverted time differential of an ECG, the algori
Autor:
Kazuhiko Takagahara, Yuki Hashimoto, Kenichi Matsunaga, Yuichi Higuchi, Nobuaki Matsuura, Kei Kuwabara, Hiroyoshi Togo, Takashi Kawahara, Akimasa Hirata, Hideto Tanaka, Taiki Miyazawa
Publikováno v:
NTT Technical Review. 19:48-54
Autor:
Kei Kuwabara, Kazuhiko Takagahara
Publikováno v:
Journal of Japan Institute of Electronics Packaging. 18:417-421
Publikováno v:
Journal of Microelectromechanical Systems. 21:1218-1228
This paper describes an analysis and a performance limit of a vibrational energy harvester with a novel slit-and-slider structure. This structure has a separable electret and microelectromechanical systems (MEMS) parts. In the MEMS parts, movable ele
Publikováno v:
ECS Transactions. 16:29-35
A technique for cleaning a gold surface using a dry process is described for the fabrication of microelectromechanical system (MEMS) devices. X-ray photoelectron spectroscopy (XPS) shows that gold is oxidized after exposure to oxygen plasma used for
Autor:
Hiroki Morimura, Kei Kuwabara, Satoshi Shigematsu, Mamoru Ugajin, Jun Terada, Norio Sato, Toshishige Shimamura, Katsuyuki Machida
Publikováno v:
Japanese Journal of Applied Physics. 47:3418-3422
In this paper, we describe a new capacitive-sensing scheme that detects the displacement of a movable structure for the control of a microelectoromechanical-systems (MEMS) device stacked on a complementary metal–oxide–semiconductor (CMOS) LSI. Th
Autor:
Tomomi Sakata, Norio Sato, Kazuhisa Kudou, Masao Nagase, Nobuhiro Shimoyama, Toshishige Shimamura, Hiromu Ishii, Kei Kuwabara, Katsuyuki Machida
Publikováno v:
Japanese Journal of Applied Physics. 46:6454-6457
In this paper, we propose a technique of preventing both wet-release-related and in-use sticking of actuators in microelectromechanical system (MEMS) devices. The technique involves the electrodeposition of a water-repellent organic dielectric film t
Autor:
Tomomi Sakata, Masaki Yano, Norio Sato, Hiromu Ishii, Kazuyoshi Ono, Hiroki Morimura, Kei Kuwabara, Katsuyuki Machida, Jun Terada, Toshikazu Kamei, Kazuhisa Kudou
Publikováno v:
Japanese Journal of Applied Physics. 46:6062-6067
This paper describes a fabrication process to integrate different types of energy-converting microelectromechanical system (MEMS) devices for a power generator. MEMS structures and a fabrication process for the monolithic integration are proposed for
Autor:
Tomomi Sakata, Katsuyuki Machida, Kei Kuwabara, Hiromu Ishii, Toshikazu Kamei, Kazuhisa Kudou, Norio Sato, Masami Urano, Junichi Kodate, Hiroki Morimura, Masaki Yano
Publikováno v:
Japanese Journal of Applied Physics. 45:6849-6853
This paper describes a novel structure and fabrication process for the integration of several types of RF microelectromechanical-system (MEMS) device, such as switches and varactors having different structures. It also describes an encapsulation tech