著者

Takashi Maki Taichu Y. Tanaka Tsuyoshi Koshiro Atsushi Shimizu Tsuyoshi T. Sekiyama Mizuo Kajino Yasunori Kurosaki Toshiya Okuro Naga Oshima

出版者

公益社団法人 日本気象学会

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

pp.2022-035, (Released:2022-09-06)

被引用文献数

1

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Ensemble future climate projections were performed using the Meteorological Research Institute Earth System Model version 2.0 (MRI-ESM2.0) for sand and dust storms (SDS), which have a significant social, economic, and climatic impact on East Asia. A past replication experiment using MRI-ESM2.0 reproduced the decreasing trend of SDS in the Gobi Desert in the early 21st century. Prediction experiments by MRI_ESM2.0 in CMIP6 future scenarios indicated no significant differences in the total amount of SDS emissions in the Gobi Desert for 2015-2100; however, SDS emissions increased with warmer scenarios in spring and autumn. In particular, March in the highest warming scenario (SSP5-8.5) exhibited an annual increase rate in SDS emissions of 3.0% for 2015-2100. Friction velocity was the factor most highly correlated with SDS emissions, with a correlation generally higher than 0.6 for all climate scenarios throughout the year. In spring and autumn, snow cover exhibited a low negative correlation with SDS emissions, while ground temperature exhibited a positive correlation. The increase in SDS emissions and subsequent dust transport by midlatitude westerlies in spring and autumn in the accelerated warming scenarios is likely due to the changes in friction velocity and erodibility due to the decrease in snow accumulation.

著者

by Shinobu Iwamura with the collaboration of Natsuki Osada and Tadashi Yamasaki with prelimina[r]y remarks on the Zirni manuscript by Nicholas Poppe

出版者

Kyoto University, Committee for the Kyoto University Scientific Expeditions to the Karakoram and the Hindukush

巻号頁・発行日

1961

著者

F. Estelle R. Simons Ledit R. F. Ardusso M. Veatrice Bilo Yehia M. El-Gamal Dennis K. Ledford Johannes Ring Mario Sanchez-Borges Gian Enrico Senna Aziz Sheikh Bernard Y. Thong 海老澤 元宏 伊藤 浩明 岡本 美孝 塩原 哲夫 谷口 正実 永田 真 平田 博国 山口 正雄 Ruby Pawankar

出版者

一般社団法人 日本アレルギー学会

雑誌

アレルギー (ISSN:00214884)

巻号頁・発行日

vol.62, no.11, pp.1464-1500, 2013-11-30 (Released:2017-02-10)

被引用文献数

5

著者

YUMIMOTO Keiya TANAKA Taichu Y. YOSHIDA Mayumi KIKUCHI Maki NAGAO Takashi M. MURAKAMI Hiroshi MAKI Takashi

出版者

Meteorological Society of Japan

雑誌

気象集誌. 第2輯 (ISSN:00261165)

巻号頁・発行日

pp.2018-035, (Released:2018-04-08)

被引用文献数

21

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The Japan Meteorological Agency (JMA) launched a next-generation geostationary meteorological satellite (GMS), Himawari-8, on October 7, 2014 and began its operation on July 7, 2015. The Advanced Himawari Imager (AHI) onboard Himawari-8 has 16 observational bands that enable the retrieval of full-disk maps of aerosol optical properties (AOPs), including aerosol optical thickness (AOT) and the Ångström exponent (AE) with unprecedented spatial and temporal resolution. In this study, we combined an aerosol transport model with the Himawari-8 AOT using the data assimilation method, and performed aerosol assimilation and forecasting experiments on smoke from an intensive wildfire that occurred over Siberia between May 15 and 18, 2016. To effectively utilize the high observational frequency of Himawari-8, we assimilated 1-h merged AOTs generated through the combination of six AOT snapshots taken over 10-min intervals, three times per day. The heavy smoke originating from the wildfire was transported eastward behind a low-pressure trough, and covered northern Japan from May 19 to 20. The southern part of the smoke plume then traveled westward, in a clockwise flow associated with high pressure. The forecast without assimilation reproduced the transport of the smoke to northern Japan; however, it underestimated AOT and the extinction coefficient compared with observed values, mainly due to errors in the emission inventory. Data assimilation with the Himawari-8 AOT compensated for the underestimation and successfully forecasted the unique C-shaped distribution of the smoke. In particular, the assimilation of the Himawari-8 AOT during May 18 greatly improved the forecast of the southern part of the smoke flow. Our results indicate that the inheritance of assimilation cycles and the assimilation of more recent observations led to better forecasting in this case of a continental smoke outflow.

著者

dirección y edición Jorge Lirola Delgado José Miguel Puerta Vílchez

出版者

Fundación Ibn Tufayl de Estudios Árabes

巻号頁・発行日

2006

著者

Kasahara S. Watashige T. Hanaguri T. Kohsaka Y. Yamashita T. Shimoyama Y. Mizukami Y. Endo R. Ikeda H. Aoyama K. Terashima T. Uji S. Wolf T. von Lohneysen H. Shibauchi T. Matsuda Y.

出版者

National Academy of Sciences

雑誌

Proceedings of the National Academy of Sciences (ISSN:00278424)

巻号頁・発行日

vol.111, no.46, pp.16309-16313, 2014-11

被引用文献数

315

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「ボース・アインシュタイン凝縮に最も近い超伝導状態」を発見. 京都大学プレスリリース. 2014-11-05.

著者

Hattori T. Ihara Y. Nakai Y. Ishida K. Tada Y. Fujimoto S. Kawakami N. Osaki E. Deguchi K. Sato N. Satoh I.

出版者

American Physical Society

雑誌

Physical Review Letters (ISSN:00319007)

巻号頁・発行日

vol.108, no.6, 2012-02

被引用文献数

115

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磁石でありながら超伝導にもなる物質の超伝導発現の新しい仕組みを解明 -磁石が生み出す超伝導-. 京都大学プレスリリース. 2012-02-07.

著者

N. Y.

出版者

公益社団法人 日本農芸化学会

雑誌

日本農芸化学会誌 (ISSN:00021407)

巻号頁・発行日

vol.53, no.4, pp.N41a-N42, 1979 (Released:2008-11-21)

著者

Takashi Maki Taichu Y. Tanaka Tsuyoshi Koshiro Atsushi Shimizu Tsuyoshi T. Sekiyama Mizuo Kajino Yasunori Kurosaki Toshiya Okuro Naga Oshima

出版者

公益社団法人 日本気象学会

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.18, pp.218-224, 2022 (Released:2022-10-27)

参考文献数

29

被引用文献数

1

---

Ensemble future climate projections were performed using the Meteorological Research Institute Earth System Model version 2.0 (MRI-ESM2.0) for sand and dust storms (SDS), which have a significant social and climatic impact on East Asia. A replication experiment using MRI-ESM2.0 reproduced the decreasing trend of SDS emissions in the Gobi Desert in the early 21st century. Prediction experiments using MRI-ESM2.0 in Coupled Model Intercomparison Project phase 6 future scenarios indicated no considerable differences in the total amount of SDS emissions in the Gobi Desert for 2015-2100; however, SDS emissions increased with warmer scenarios in spring and autumn. In particular, March in the highest warming scenario (SSP5-8.5) exhibited an annual increase rate of 3.0% in SDS emissions for the years 2015-2100. Friction velocity was highly correlated with SDS emissions, with a correlation of ∼0.6 for all climate scenarios throughout the year. In spring and autumn, snow cover exhibited a low negative correlation with SDS emissions, while ground temperature exhibited a positive correlation. The increase in SDS emissions and subsequent dust transport by midlatitude westerlies in spring and autumn during accelerated warming scenarios could be attributed to the changes in friction velocity and erodibility due to the decrease in snow accumulation.

著者

久田 由佳子 ヒサダ ユカコ Y. HISADA

雑誌

紀要. 地域研究・国際学編

巻号頁・発行日

vol.43, pp.231-245, 2011

著者

椎木 泰華 松原 由布子 川西 舞 米山 直樹 Y. Shiinoki Y. Matsubara M. Kawanishi Naoki Yoneyama

雑誌

関西学院大学心理科学研究 = Kwansei Gakuin University Bulletin of Psychological Science Research (ISSN:21876355)

巻号頁・発行日

vol.44, pp.37-42, 2018-03-25

著者

Kenichi Kusunoki Ken-ichiro Arai Hanako Y. Inoue Chusei Fujiwara

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.15, pp.234-237, 2019 (Released:2019-11-15)

参考文献数

23

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On 11 December 2012, a wind gust caused an F0-intensity wind damage in the Shonai area, Yamagata Prefecture, Japan. This paper provides an overview of an anticyclonic misocyclone (i.e., anticyclonic circulation in the Doppler velocity) related to a wind gust from X-band Doppler radar data. The anticyclonic misocyclone was embedded within a cell with a spiral echo diameter of approximately 3-4 km. The misocyclone over the Sea of Japan moved southeastward at a speed of 11 m s−1, made landfall, and passed over the damaged area; this timing is consistent with the Japan Meteorological Agency (JMA) wind damage assessment. Over the damaged area, the diameter of the misocyclone in the Doppler velocity was estimated to be smaller than 893 m, and the peak tangential wind speed and the vorticity of the vortex were estimated to be at least 8 m s−1 and −3.6 × 10−2 sec−1, respectively. This study discusses various possible explanations for the relationship between the misocyclone and wind gust and provides a first overview of a wintertime anticyclonic misocyclone associated with a surface wind gust on the coast of the Sea of Japan and may provide useful insights to the understanding of wintertime vortices.

著者

Hanako Y. Inoue Kenichi Kusunoki Toru Adachi Chusei Fujiwara Naoki Ishitsu Ken-ichiro Arai

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

vol.15, pp.228-233, 2019 (Released:2019-11-12)

参考文献数

24

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The characteristics and finescale evolution of misovortices within a snowband were examined using low-level high-resolution single- and dual-Doppler radar analysis. From 02:00 to 06:00 JST on 17 January 2017, many misovortices developed within three snowbands in the Japan Sea coastal region. The vortices developed along the shear line between the offshore north-northwesterly and the coastal northeasterly. As discussed in several previous studies of misovortices along airmass boundaries, horizontal shearing instability was considered to be a possible mechanism responsible for misovortex formation. A detailed investigation was performed on the most distinct snowband and misovortices embedded within it. Dual-Doppler analysis revealed a detailed behavior of vortex during merger, such as the morphological change from quasi-circular to elliptical shape, and the counterclockwise rotation which caused high-amplitude inflection of the shear line in less than 10 minutes. During the decay stage, the vortices weakened along with weakening convergence. The results suggest that evolution of the misovortex appears to have been closely tied to the low-level convergence within the vortex.

著者

Hanako Y. Inoue Kenichi Kusunoki Toru Adachi Chusei Fujiwara Naoki Ishitsu Ken-ichiro Arai

出版者

Meteorological Society of Japan

雑誌

SOLA (ISSN:13496476)

巻号頁・発行日

pp.2019-041, (Released:2019-10-18)

---

The characteristics and finescale evolution of misovortices within a snowband were examined using low-level high-resolution single- and dual-Doppler radar analysis. From 02:00 to 06:00 JST on 17 January 2017, many misovortices developed within three snowbands in the Japan Sea coastal region. The vortices developed along the shear line between the offshore north-northwesterly and the coastal northeasterly. As discussed in several previous studies of misovortices along airmass boundaries, horizontal shearing instability was considered to be a possible mechanism responsible for misovortex formation. A detailed investigation was performed on the most distinct snowband and misovortices embedded within it. Dual-Doppler analysis revealed a detailed behavior of vortex during merger, such as the morphological change from quasi-circular to elliptical shape, and the counterclockwise rotation which caused high-amplitude inflection of the shear line in less than 10 minutes. During the decay stage, the vortices weakened along with weakening convergence. The results suggest that evolution of the misovortex appears to have been closely tied to the low-level convergence within the vortex.

著者

N. Y.

出版者

公益社団法人 日本農芸化学会

雑誌

日本農芸化学会誌 (ISSN:00021407)

巻号頁・発行日

vol.56, no.4, pp.309-311, 1982 (Released:2008-11-21)

著者

Moritake Iguchi Yuji Tezuka Hisashi Ogawa Yasuhiro Hamatani Daisuke Takagi Yoshimori An Takashi Unoki Mitsuru Ishii Nobutoyo Masunaga Masahiro Esato Hikari Tsuji Hiromichi Wada Koji Hasegawa Mitsuru Abe Gregory Y.H. Lip Masaharu Akao

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-17-1155, (Released:2018-03-09)

参考文献数

32

被引用文献数

27

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Background:Heart failure (HF) is a heterogeneous syndrome, but the effect of the type and severity of HF on the incidence of stroke or systemic embolism (SE) in atrial fibrillation (AF) patients is unclear.Methods and Results:The Fushimi AF Registry is a community-based prospective survey of AF patients in Fushimi-ku, Kyoto, Japan. Follow-up data were available for 3,749 patients. We defined pre-existing HF as having one of the following: prior hospitalization for HF, presence of HF symptoms (NYHA ≥2), or reduced ejection fraction (<40%). At baseline, 1,008 (26.9%) patients had pre-existing HF. On multivariate analysis, the incidence of stroke/SE was not associated with pre-existing HF (hazard ratio (HR), 1.24; 95% confidence interval (CI), 0.92–1.64) or each criterion for the definition of pre-existing HF, but was associated with high B-type natriuretic peptide (BNP) or N-terminal proBNP levels (above the median of the pre-existing HF group) at baseline (HR, 1.65; 95% CI, 1.06–2.53). Stroke/SE was markedly increased in the initial 30-day period following hospital admission for HF (HR, 12.0; 95% CI, 4.59–31.98).Conclusions:The effect of HF on the incidence of stroke/SE may depend on the stage or severity of HF in patients with AF. The incidence of stroke/SE was markedly increased in the 30 days after admission for HF, but compensated ‘stable’ HF did not appear to confer an independent risk.

著者

Stephen J.H. Yang Owen H.T. Lu Anna Y.Q. Huang Jeff C.H. Huang Hiroaki Ogata Albert J.Q. Lin

出版者

Information Processing Society of Japan

雑誌

Journal of Information Processing (ISSN:18826652)

巻号頁・発行日

vol.26, pp.170-176, 2018 (Released:2018-02-15)

参考文献数

29

被引用文献数

34

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With the rise of big data analytics, learning analytics has become a major trend for improving the quality of education. Learning analytics is a methodology for helping students to succeed in the classroom; the principle is to predict student's academic performance at an early stage and thus provide them with timely assistance. Accordingly, this study used multiple linear regression (MLR), a popular method of predicting students' academic performance, to establish a prediction model. Moreover, we combined MLR with principal component analysis (PCA) to improve the predictive accuracy of the model. Traditional MLR has certain drawbacks; specifically, the coefficient of determination (R2) and mean square error (MSE) measures and the quantile-quantile plot (Q-Q plot) technique cannot evaluate the predictive performance and accuracy of MLR. Therefore, we propose predictive MSE (pMSE) and predictive mean absolute percentage correction (pMAPC) measures for determining the predictive performance and accuracy of the regression model, respectively. Analysis results revealed that the proposed model for predicting students' academic performance could obtain optimal pMSE and pMAPC values by using six components obtained from PCA.

著者

T. Abe K. Kawamoto T. Yasuda C. F. Kearns T. Midorikawa Y. Sato

出版者

日本加圧トレーニング学会

雑誌

International Journal of KAATSU Training Research (ISSN:13494562)

巻号頁・発行日

vol.1, no.1, pp.19-23, 2005 (Released:2008-07-18)

参考文献数

17

被引用文献数

17 68

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The purpose of this study was to investigate the effects of short-term KAATSU-resistance training on skeletal muscle size and sprint/jump performance in college athletes. Fifteen male track and field college athletes were randomly divided into two groups: KAATSU (resistive exercise combined with blood flow restriction, n=9) and control (n=6) groups. The KAATSU group trained twice daily with squat and leg curl exercises (20% of 1-RM, 3 sets of 15 repetitions) for 8 consecutive days while both KAATSU and control groups participated in the regular sprint/jump training sessions. Maximal strength, muscle-bone CSA, mid-thigh muscle thickness (MTH), and sprint/jump performance were measured before and after the 8 days of training. The muscle-bone CSA increased 4.5% (p<0.01) in the KAATSU group but decreased 1% (p>0.05) in the control group. Quadriceps and hamstrings MTH increased (p<0.01) by 5.9% and 4.5%, respectively, in the KAATSU group but did not change in the control group. Leg press strength increased (9.6%, p<0.01) in the KAATSU group but not (4.8%, p>0.05) in the control group. Overall 30-m dash times improved (p<0.05) in the KAATSU-training group, with significant improvements (p<0.01) occurring during the initial acceleration phase (0-10m) but not in the other phases (10-20m and 20-30m). None of the jumping performances improved (p>0.05) for either the KAATSU or control groups. These data indicated that eight days of KAATSU-training improved sprint but not jump performance in collegiate male track and field athletes.

著者

Tsutsumi Naotaka Kimura Takeshi Arita Kyohei Ariyoshi Mariko Ohnishi Hidenori Yamamoto Takahiro Zuo Xiaobing Maenaka Katsumi Park Enoch Y Kondo Naomi Shirakawa Masahiro Tochio Hidehito Kato Zenichiro

出版者

Nature Publishing Group

雑誌

Nature communications (ISSN:20411723)

巻号頁・発行日

vol.5, 2014-12-15

被引用文献数

92

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免疫・神経難治疾患の治療薬開発を促進するインターロイキン18複合体立体構造を解明. 京都大学プレスリリース. 2014-12-16.

著者

Endurance A. Ophori Musa Y. Tula Azuka V. Azih Rachel Okojie Precious E. Ikpo

出版者

日本熱帯医学会

雑誌

Tropical Medicine and Health (ISSN:13488945)

巻号頁・発行日

pp.2013-13, (Released:2014-04-23)

被引用文献数

2 83

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Immunization is aimed at the prevention of infectious diseases. In Nigeria, the National Programme on Immunization (NPI) suffers recurrent setbacks due to many factors including ethnicity and religious beliefs. Nigeria is made up of 36 states with its federal capital in Abuja. The country is divided into six geo-political zones; north central, north west, north east, south east, south west and south south. The population is unevenly distributed across the country. The average population density in 2006 was estimated at 150 people per square kilometres with Lagos, Anambra, Imo, Abia, and Akwa Ibom being the most densely populated states. Most of the densely populated states are found in the south east. Kano with an average density of 442 persons per square kilometre, is the most densely populated state in the northern part of the country. This study presents a review on the current immunization programme and the many challenges affecting its success in the eradication of childhood diseases in Nigeria.