Atsushi Tanaka

Wakayama Medical University

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Yasuyuki Shibata

National Institute for Environmental Studies

Jun Yoshinaga

National Institute for Environmental Studies

Masatoshi Morita

Gifu Shotoku Gakuen University

M. Takagi

National Institute for Environmental Studies

Minoru Yoneda

The University of Tokyo

Haruhiko Seyama

National Institute for Environmental Studies

Masataka Nishikawa

National Institute for Environmental Studies

Mitsuyuki Soma

University of Shizuoka

Hideyuki Okuzumi

Tokyo Gakugei University

Takashi Uehiro

National Institute for Environmental Studies

Cooperative Institutions

Centre Hospitalier Universitaire de Liège

229

University of Liège

182

The University of Tokyo

National Institute for Environmental Studies

Tohoku University

Centro Cardiologico Monzino

Kyoto University

Assistance Publique – Hôpitaux de Paris

Hacettepe University

Nagoya University

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Evaluation of Sleep Quality Based on Environment and Vital Sensor Signals Using Big Data Analysis and Deep Learning

IEICE Proceedings Series (2017)

Minami Tsuchiya Atsushi Tanaka Muneki Yasuda Tomochika Harada M. YOKOYAMA

Sleep

Source

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Study of analysis methods of iodine 129 in collected samples from atmosphere - 2

Yasuyuki Shibata Fumiaki Kato Toshiyuki Kobayashi Atsushi Tanaka Taeko Doi

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Compound-Specific Radiocarbon Ages of Fatty Acids in Marine Sediments from the Western North Pacific

Radiocarbon (2001)

Masao Uchida Yasuyuki Shibata Kimitaka Kawamura Yuichiro Kumamoto Minoru Yoneda

Compound-specific radiocarbon analysis of five fatty-acid biomarkers was conducted for marine sediments collected from the western North Pacific. The fatty acids (C 12 to C 34 ) showed a typical bimodal distribution pattern with two maxima at C 16 and C 26 . Their carbon isotopic compositions ranged from −25.1‰ (C 16 ) to −31.8‰ (C 28 ), suggesting that they derived from terrestrial higher plants and marine organisms. A large variations of 14 C ages were found among the fatty acids detected in the same sedimentary horizon of the core, ranging from 530 BP (C 18 ) to 3250 BP (C 28 ). The results of 14 C analysis of fatty acids could be divided into two groups, i.e., lower molecular weight (LMW) fatty acids (C 16 , C 18 ) derived from marine organisms and higher molecular weight (HMW) fatty acids (C 24 , C 26 , C 28 ) derived from terrestrial higher plants. The HMW fatty acids showed older ages, ranging from 2550 BP (C 24 ) to 3250 BP (C 28 ), than LMW fatty acids (530 BP [C 18 ] to 1,820 years BP [C 16 ]). On the other hand, bulk-phase total organic matter (TOM) showed the age of 2260 BP that is between those two groups, suggesting that it was likely a mixture of organic matter derived from marine and terrestrial sources. The compound specific 14 C ages and δ 13 C data of sedimentary fatty acids presented here could provide useful information to decipher the fate and transport process of terrestrial organic matter to marine sediments.

Sedimentary organic matter

10.1017/s0033822200041618

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Citations (38)

Dynamics and Control in Space. Vibration Suppression of Flexible Structures by Bang-Bang Control. 2nd Report. Characteristics of Control Methods and Verification by Computer Simulation and Hardware Experiments.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C (1994)

Atsushi Tanaka Yoshiaki Ohkami Saburo Matunaga Hideyuki Kamiya

Based on the results previously reported, the authors have evaluated the performance of bang-bang vibration control methods using information on velocity, acceleration or displacement. From the results of analysis for a simple 2/3 DOF model and also from the simulation and experimental results for a beam, it turns out that the proposed bang-bang velocity feedback control equals or exceeds the conventional DVFB control in terms of vibration suppression capability, power consumption as well as robustness to system parameter variations.

Bang–bang control

Robustness

10.1299/kikaic.60.4049

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Elemental Composition of Japanese House Dust and the Source of Lead

Indoor Environment (2008)

Yuki Nakamura M. Takagi Jun Yoshinaga Atsushi Tanaka Haruhiko Seyama

室内塵の非意図的摂取によるPb等重金属の摂取量を低減化するための対策に向けた基礎的調査として, 首都圏の一般家庭10軒から提供された掃除機ごみの2mm以下の粒径の粒子を室内塵とし, それ以下の粒径毎 (2-1mm; 1mm-500μm; 500-250μm; 250-100μm; 100-53μm, <53μm) に20元素 (Al, Ba, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, P, Pb, S, Sr, Ti, V, Zn) の濃度をICP発光法とICP質量分析法によって測定した。室内塵を構成する%オーダー以上の主要元素としてはCa, Al, Feがあり, ついでアルカリ, アルカリ土類元素濃度が高かった。多くの元素は地殻存在度レベルであったが, Cd, Cu, Pb, S, Znなどは地殻に比べて10~30倍濃縮しており, 室内塵にはこれら元素の人為汚染があることが示唆された。一般に粒径が小さくなるほど元素濃度は増大する傾向があったが, Pbなどは最小粒径では最大濃度を示さず, 汚染形態が粒子表面への吸着によるものだけではない可能性を示していた。因子分析の結果, 室内塵の元素組成は土壌, 汚染, 塗料, アルカリ金属の4因子によってその70%以上が説明可能で, わが国の室内塵中Pbの起源として塗料が示唆された。

10.7879/siej2007.11.11

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Citations (9)

Changing Tendency Analysis of Sleep Quality on the Basis of Temperature and Respiratory Frequency Using a Neural Network Model

International Journal of Fuzzy Logic and Intelligent Systems (2020)

Minami Tsuchiya Seung-Il Cho Atsushi Tanaka Muneki Yasuda Tomochika Harada

Minami Tsuchiya, Seung-Il Cho, Atsushi Tanaka, Muneki Yasuda, Tomochika Harada, and Michio Yokoyama. International Journal of Fuzzy Logic and Intelligent Systems 2020;20:87-95. https://doi.org/10.5391/IJFIS.2020.20.2.87

Sleep

Basis (linear algebra)

10.5391/ijfis.2020.20.2.87

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Citations (2)

Characteristics of lead isotope ratios and elemental concentrations in PM10 fraction of airborne particulate matter in Shanghai after the phase-out of leaded gasoline

Atmospheric Environment (2004)

Jian Zheng Mingguang Tan Yasuyuki Shibata Atsushi Tanaka Yan Li

Isotope Analysis

Fraction (chemistry)

10.1016/j.atmosenv.2003.11.004

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Citations (249)

The Damage of Geranium Exposed to Boron Compounds in the Atmosphere by the Exposure Chamber

Journal of Environmental Chemistry (2004)

Seiichi TORIYAMA Takayuki Kondo Tsuyoshi Mizuhata Hideichi Okumura Akihiro Mizukami

40℃～100℃で1.3mg/m3～2.7mg/m3の濃度のホウ素化合物を数時間発生させることができる装置を作製した。ゼラニウムの入った人工植物曝露装置ヘホウ素化合物を導入したところ, 葉の先端部等に障害が現れ, 過去に発生した植物被害状況と同じであった。その葉中のホウ素濃度は160～5, 000μg/gであった。大気中ホウ素化合物による植物被害が実証された。

10.5985/jec.14.825

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Citations (2)

Arsenic and heavy metal contamination of rice, pulses and vegetables grown in Samta village, Bangladesh

Elsevier eBooks (2003)

Mehboob Alam Elizabeth T. Snow Atsushi Tanaka

Tube well

Contaminated water

10.1016/b978-044451441-7/50009-9

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Citations (23)

Specimen banking at National Institute for Environmental Studies, Japan

Chemosphere (1997)

Morita Masatoshi Jun Yoshinaga Hitoshi Mukai Yoshinari Ambe Atsushi Tanaka

10.1016/s0045-6535(97)00052-0

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Citations (10)