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273 results on '"Nagahama S"'

1. Clustering of Lifestyle Factors and Its Association with Low Back Pain: A Cross-Sectional Study of Over 400,000 Japanese Adults

Author

Yoshimoto T, Ochiai H, Shirasawa T, Nagahama S, Uehara A, Muramatsu J, and Kokaze A

Subjects
lifestyle, low back pain, clustering, health checkup, Medicine (General), R5-920
Abstract

Takahiko Yoshimoto,1 Hirotaka Ochiai,1 Takako Shirasawa,1 Satsue Nagahama,2 Akihito Uehara,1 Jun Muramatsu,1 Akatsuki Kokaze1 1Department of Hygiene, Public Health and Preventive Medicine, Showa University School of Medicine, Shinagawa-Ku, Tokyo, Japan; 2All Japan Labor Welfare Foundation, Shinagawa-Ku, Tokyo, JapanCorrespondence: Takahiko Yoshimoto Email yoshimotot@med.showa-u.ac.jpPurpose: Although many studies have indicated the association between low back pain (LBP) and lifestyle factors, the combined effect of lifestyle factors on LBP has not been adequately investigated. We aimed to investigate the association between a cluster of unhealthy lifestyle behaviors and LBP using a large cohort of Japanese adults.Methods: We included 419,003 adults aged over 20 years who underwent an annual health checkup between April 2013 and March 2014 in Japan. Information on the following lifestyle factors was collected using the standardized questionnaire: smoking, alcohol intake, exercise, physical activity, walking speed, weight control, eating habits, and sleep. Each factor was evaluated as a dichotomous variable (1: health risk, 0: no health risk). A lifestyle risk score was calculated by summing the score of each lifestyle factor (range: 0– 12) and was categorized into three groups (low, moderate, high). LBP was defined as self-reported LBP under treatment. Logistic regression analysis was conducted to calculate the odds ratio (OR) and 95% confidence interval (CI) for LBP.Results: In multivariable logistic regression analysis, the OR for LBP was significantly higher in the moderate-risk score group (adjusted OR: 1.33 [95% CI: 1.23– 1.44] in men; 1.40 [95% CI: 1.27– 1.54] in women) and the high-risk score group (adjusted OR: 1.54 [95% CI: 1.43– 1.67] in men; 1.83 [95% CI: 1.64– 2.03] in women) than in the low-risk score group. A trend of higher risk of LBP associated with higher lifestyle risk score was observed in both sexes (p for trend < 0.001). These results were similar even in subgroup analysis by age and body mass index (BMI).Conclusion: Clustering of unhealthy lifestyles was associated with increased risk of LBP regardless of age and BMI. These results may provide implications for better prevention and management of LBP, considering modifiable lifestyle factors.Keywords: lifestyle, low back pain, clustering, health checkup

Published
2020

2. Doubly Enhanced Skyrmions in $\nu =2$ Bilayer Quantum Hall States

Author

Kumada, N., Sawada, A., Ezawa, Z. F., Nagahama, S., Azuhata, H., Muraki, K., Saku, T., and Hirayama, Y.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons
Abstract

By tilting the samples in the magnetic field, we measured and compared the Skyrmion excitations in the bilayer quantum Hall (QH) state at the Landau-level filling factor $\nu =2$ and in the monolayer QH state at $\nu =1$. The observed number of flipped spins is $N_s=14$ in the bilayer system with a large tunneling gap, and $N_s=7$ in the bilayer system with a small tunneling gap, while it is $N_s=7$ in the monolayer system. The difference is interpreted due to the interlayer exchange interaction. Moreover, we have observed seemingly preferred numbers $N_s=14,7,1$ for the flipped spins by tilting bilayer samples., Comment: 4 pages, 4 figures

Published
2000
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8. 1221 Changes in body mass index before and after long-term sick leave due to cancer among workers: j-ecoh study

Author

Kuwahara, K, primary, Endo, M, additional, Nanri, A, additional, Kashino, I, additional, Nishiura, C, additional, Hori, A, additional, Kinugawa, C, additional, Nakagawa, T, additional, Honda, T, additional, Yamamoto, S, additional, Imai, T, additional, Nishihara, A, additional, Uehara, A, additional, Yamamoto, M, additional, Miyamoto, T, additional, Sasaki, N, additional, Ogasawara, T, additional, Tomita, K, additional, Nagahama, S, additional, Kochi, T, additional, Eguchi, M, additional, Okazaki, H, additional, Murakami, T, additional, Shimizu, M, additional, Kabe, I, additional, Mizoue, T, additional, and Dohi, S, additional

Published
2018
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10. Stimulated emission at 474 nm from an InGaN laser diode structure grown on a (11(2)over-bar2) GaN substrate

Author

Kojima, K., Funato, M., Kawakami, Y., Masui, S., Nagahama, S., and Mukai, T.

Abstract

The stimulated emissions from semipolar InGaN laser diode (LD) structures grown on (11[overline 2]2) GaN substrates are observed at room temperature under photopumped conditions. The measured emission peaks are in the photon energy range from 2.62 eV (474 nm) to 3.05 eV (405 nm), and the emission intensity has a threshold behavior with respect to the pumping power. A strong in-plane optical anisotropy is observed between the two perpendicular directions, [[overline 1] [overline 1]23] and [1[overline 1]00], due to anisotropic matrix elements, which depend on the crystal orientation; the stimulated emission measured along the [[overline 1] [overline 1]23] direction occurs with a lower threshold pumping power at a lower energy compared to that obtained along the [1[overline 1]00] direction. The experimental results and the valence band calculations indicate that the transverse-electric mode with an electric vector along the [1[overline 1]00] direction is dominant for gain formation in semipolar and nonpolar InGaN LDs. Compared to c-plane InGaN LDs, semipolar InGaN LDs have comparable or less threshold pumping powers.

Published
2007

13. Doubly Enhanced Skyrmions in $��=2$ Bilayer Quantum Hall States

Author

Kumada, N., Sawada, A., Ezawa, Z. F., Nagahama, S., Azuhata, H., Muraki, K., Saku, T., and Hirayama, Y.

Subjects
Condensed Matter::Soft Condensed Matter, Strongly Correlated Electrons (cond-mat.str-el), Condensed Matter::Superconductivity, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), FOS: Physical sciences, Condensed Matter::Strongly Correlated Electrons, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Abstract

By tilting the samples in the magnetic field, we measured and compared the Skyrmion excitations in the bilayer quantum Hall (QH) state at the Landau-level filling factor $��=2$ and in the monolayer QH state at $��=1$. The observed number of flipped spins is $N_s=14$ in the bilayer system with a large tunneling gap, and $N_s=7$ in the bilayer system with a small tunneling gap, while it is $N_s=7$ in the monolayer system. The difference is interpreted due to the interlayer exchange interaction. Moreover, we have observed seemingly preferred numbers $N_s=14,7,1$ for the flipped spins by tilting bilayer samples., 4 pages, 4 figures

Published
2000
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15. Stimulated emission at 474 nm from an InGaN laser diode structure grown on a (11(2)over-bar2) GaN substrate

Author

70240827, 30214604, Kojima, K., Funato, M., Kawakami, Y., Masui, S., Nagahama, S., Mukai, T., 70240827, 30214604, Kojima, K., Funato, M., Kawakami, Y., Masui, S., Nagahama, S., and Mukai, T.

Abstract

The stimulated emissions from semipolar InGaN laser diode (LD) structures grown on (11[overline 2]2) GaN substrates are observed at room temperature under photopumped conditions. The measured emission peaks are in the photon energy range from 2.62 eV (474 nm) to 3.05 eV (405 nm), and the emission intensity has a threshold behavior with respect to the pumping power. A strong in-plane optical anisotropy is observed between the two perpendicular directions, [[overline 1] [overline 1]23] and [1[overline 1]00], due to anisotropic matrix elements, which depend on the crystal orientation; the stimulated emission measured along the [[overline 1] [overline 1]23] direction occurs with a lower threshold pumping power at a lower energy compared to that obtained along the [1[overline 1]00] direction. The experimental results and the valence band calculations indicate that the transverse-electric mode with an electric vector along the [1[overline 1]00] direction is dominant for gain formation in semipolar and nonpolar InGaN LDs. Compared to c-plane InGaN LDs, semipolar InGaN LDs have comparable or less threshold pumping powers.

Published
2007

30. Recent progress of nitride-based light emitting devices

Author

Mukai, T., primary, Nagahama, S., additional, Sano, M., additional, Yanamoto, T., additional, Morita, D., additional, Mitani, T., additional, Narukawa, Y., additional, Yamamoto, S., additional, Niki, I., additional, Yamada, M., additional, Sonobe, S., additional, Shioji, S., additional, Deguchi, K., additional, Naitou, T., additional, Tamaki, H., additional, Murazaki, Y., additional, and Kameshima, M., additional

Published
2003
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38. CCDC102B confers risk of low vision and blindness in high myopia

Author

Yoshikatsu Hosoda, Munemitsu Yoshikawa, Masahiro Miyake, Yasuharu Tabara, Noriaki Shimada, Wanting Zhao, Akio Oishi, Hideo Nakanishi, Masayuki Hata, Tadamichi Akagi, Sotaro Ooto, Natsuko Nagaoka, Yuxin Fang, Nagahama Study group, Kyoko Ohno-Matsui, Ching-Yu Cheng, Seang Mei Saw, Ryo Yamada, Fumihiko Matsuda, Akitaka Tsujikawa, and Kenji Yamashiro

Subjects
Science
Abstract

Myopic maculopathy is a complication of myopia that often progresses to blindness. Here, in a genome-wide association study, Hosoda et al. find that rs11873439 intronic to CCDC102B is associated with myopic maculopathy, but not with myopia, thus representing a risk factor independent of myopia.

Published
2018
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50. Two-Dimensional Hydrogen Bond Networks Supported by CH/π Interaction Leading to a Molecular Packing Appropriate for Topochemical Polymerization of 1,3-Diene Monomers

Author

Nagahama, S., Inoue, K., Sada, K., Miyata, M., and Matsumoto, A.

Abstract

Strong and weak hydrogen bonds, as intermolecular interactions, are used for the construction of designer crystals with organic small molecules as the building blocks. We report here crystal engineering for the synthetic plan of the topochemical polymerization using the ammonium derivatives of 1,3-diene mono- and dicarboxylic acids on the basis of intermolecular interactions such as NH/O and CH/π interactions. The isomerism of hydrogen bond network structures obstructs the prediction of crystal structure and reactivity, although topochemical polymerization requires that monomer molecules stack in a column with a stacking distance of 5 Å in the crystals. The structures of hydrogen bond networks are roughly classified into a two-dimensional type appropriate for topochemical polymerization, and the others consisting of two-dimensional sheets or one-dimensional ladders not for polymerization. We conclude that the CH/π interaction of naphthylmethyl and benzyl substituents promises to give polymerizable lamella crystals, of which the interface is supported by robust two-dimensional hydrogen bond networks reinforced by lining with CH/π interaction between benzylic and aromatic hydrogens and π-electrons.

Published
2003

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