Search Results - "Shin-ichiro Sakai"

In-orbit estimation of time-varying residual magnetic moment by Soken, Halil Ersin, Sakai, Shin-ichiro, Wisniewski, Rafal

“…A method for in-orbit estimation of time-varying residual magnetic moment (RMM) is presented. By use of a simple approach, the covariance of the Kalman filter…”
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Adaptive Tuning of the Unscented Kalman Filter for Satellite Attitude Estimation by Soken, Halil Ersin, Sakai, Shin-ichiro

“…AbstractDetermining the process noise covariance of the unscented Kalman filter (UKF) is a difficult procedure. The analytical approximation method gives…”
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Filtering-Based Three-Axis Attitude Determination Package for Spinning Spacecraft: Preliminary Results with Arase by Soken, Halil Ersin, Sakai, Shin-ichiro, Asamura, Kazushi, Nakamura, Yosuke, Takashima, Takeshi, Shinohara, Iku

“…JAXA’s ERG (Exploration of Energization and Radiation in Geospace) Spacecraft, which is nicknamed Arase, was launched on 20 December 2016. Arase is a…”
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Exploration of energization and radiation in geospace (ERG): challenges, development, and operation of satellite systems by Nakamura, Yosuke, Fukuda, Seisuke, Shibano, Yasuko, Ogawa, Hiroyuki, Sakai, Shin-ichiro, Shimizu, Shigehito, Soken, Ersin, Miyazawa, Yu, Toyota, Hiroyuki, Kukita, Akio, Maru, Yusuke, Nakatsuka, Junichi, Sakai, Tomohiko, Takeuchi, Shinsuke, Maki, Kenichiro, Mita, Makoto, Ogawa, Emiko, Kakehashi, Yuya, Nitta, Kumi, Asamura, Kazushi, Takashima, Takeshi, Shinohara, Iku

“…The exploration of energization and radiation in geospace (ERG) satellite, nicknamed “Arase,” is the second satellite in a series of small scientific…”
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Attitude estimation and magnetometer calibration using reconfigurable TRIAD+filtering approach by Soken, Halil Ersin, Sakai, Shin-ichiro

“…This paper proposes using TRIAD and Unscented Kalman Filter (UKF) algorithms in a sequential architecture as a part of a small satellite attitude estimation…”
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A new likelihood approach to autonomous multiple model estimation by Soken, Halil Ersin, Sakai, Shin-ichiro

“…This paper presents an autonomous multiple model (AMM) estimation algorithm for hybrid systems with sudden changes in their parameters. Estimates of Kalman…”
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Robust Kalman filtering for small satellite attitude estimation in the presence of measurement faults by Soken, Halil Ersin, Hajiyev, Chingiz, Sakai, Shin-ichiro

“…In normal working conditions it is possible to achieve sufficient attitude estimation accuracy for a satellite using regular Kalman filter algorithm. On the…”
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Dimethyl carbonate synthesis by oxidative carbonylation on activated carbon supported CuCl2 catalysts : catalytic properties and structural change by TOMISHIGE, K, SAKAIHORI, T, SAKAI, S.-I, FUJIMOTO, K

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Real-Time Attitude Independent Calibration of Spinning Spacecraft Magnetometers Using Quasi-Measurements by Cetin, Mustafa Efe, Soken, Halil Ersin, Sakai, Shin-ichiro

“…Magnetometers are essential sensors for attitude estimation in small spacecraft due to their robust, inexpensive, and lightweight characteristics. However, the…”
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Antinociceptive action of mitragynine in mice: Evidence for the involvement of supraspinal opioid receptors by Matsumoto, Kinzo, Mizowaki, Maho, Suchitra, Thongpradichote, Takayama, Hiromitsu, Sakai, Shin-ichiro, Aimi, Norio, Watanabe, Hiroshi

“…Mitragynine is a major alkaloidal constituent extracted from the young leaves of Mitragyna speciosa Korth. (Rubiaceae). We investigated an antinociceptive…”
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Dynamic driving/braking force distribution in electric vehicles with independently driven four wheels by Sakai, Shin-Ichiro, Sado, Hideo, Hori, Yoichi

“…A novel algorithm for the dynamic driving/braking force distribution is proposed for electric vehicles (EV) with four in‐wheel motors. In such EVs, the vehicle…”
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Motion control in an electric vehicle with four independently driven in-wheel motors by Sakai, S., Sado, H., Hori, Y.

“…We study methods of motion control for an electric vehicle (EV) with four independently driven in-wheel motors. First, we propose and simulate a novel robust…”
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Suppressive Effect of Mitragynine on the 5-Methoxy-N,N-dimethyltryptamine-Induced Head-Twitch Response in Mice by Matsumoto, Kinzo, Mizowaki, Maho, Takayama, Hiromitsu, Sakai, Shin-Ichiro, Aimi, Norio, Watanabe, Hiroshi

“…We investigated the effects of mitragynine, a major alkaloid isolated from the leaves of Mitragyna speciosa Korth (Rubiaceae), on the 5-HT 2A receptor-mediated…”
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The first total synthesis of (−)-mitragynine, an analgesic indole alkaloid in mitragyna speciosa by Takayama, Hiromitsu, Maeda, Moriyoshi, Ohbayashi, Satoshi, Kitajima, Mariko, Sakai, Shin-ichiro, Aimi, Norio

“…Starting from an optically pure alcohol, ( R)-( 3), which was prepared by enzymatic hydrolysis of the racemic acetate ( 2) or enantioselective reduction of the…”
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Structure revision of mitragynaline, an indole alkaloid in Mitragyna speciosa by Takayama, Hiromitsu, Ishikawa, Hayato, Kurihara, Mika, Kitajima, Mariko, Sakai, Shin-ichiro, Aimi, Norio, Seki, Hiroko, Yamaguchi, Kentaro, Said, Ikram M, Houghton, Peter J

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Effects of Mitragynine on cAMP Formation Mediated by δ-Opiate Receptors in NG108-15 Cells by TOHDA, Michihisa, THONGPRADITCHOTE, Suchitra, MATSUMOTO, Kinzo, MURAKAMI, Yukihisa, SAKAI, Shin-ichiro, AIMI, Norio, TAKAYAMA, Hiromitsu, TONGROACH, Pavich, WATANABE, Hiroshi

“…Mitragynine, a major constituent of the young leaves of Mitragyna speciosa KORTH., has been reported to exert antinociceptive activity in mice. To determine…”
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Final solution on the long-standing structural arguments on the C-3 stereochemistries of three glucoindole alkaloids: Palicoside, dolichantoside, and isodolichantoside — through chemical conversions and spectroscopic studies by Ohmori, Osamu, Kumazawa, Kyoko, Hoshino, Hiroyuki, Suzuki, Takako, Morishima, Yuka, Kohno, Hiroko, Kitajima, Mariko, Sakai, Shin-ichiro, Takayama, Hiromitsu, Aimi, Norio

“…Three natural strictosidine/vincoside-class glucoindole alkaloids have been chemically correlated with strictosidinic acid possessing a rigorously established…”
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Effects of hirsutine, an antihypertensive indole alkaloid from Uncaria rhynchophylla, on intracellular calcium in rat thoracic aorta by Horie, S, Yano, S, Aimi, N, Sakai, S, Watanabe, K

“…The effects of hirsutine, an indole alkaloid from Uncaria rhynchophylla (MIQ.) Jackson, on cytosolic Ca2+ level ([Ca2+]cyt) were studied by using fura-2-Ca2+…”
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A series of small scientific satellite with flexible standard bus by Saito, Hirobumi, Sawai, Syujiro, Sakai, Shin-ichiro, Fukuda, Seisuke, Kitade, Kenji

“…Japan Aerospace Exploration Agency has a plan to develop the small satellite standard bus for various scientific missions and disaster monitoring missions. The…”
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Central antinociceptive effects of mitragynine in mice: contribution of descending noradrenergic and serotonergic systems by Matsumoto, Kinzo, Mizowaki, Maho, Suchitra, Thongpradichote, Murakami, Yukihisa, Takayama, Hiromitsu, Sakai, Shin-ichiro, Aimi, Norio, Watanabe, Hiroshi

“…Mitragynine is a major alkaloidal constituent of young leaves of Mitragyna speciosa Korth, that is known to exhibit narcotic-like activity. In this study, we…”
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