Search results for: H. Yamaguchi

Items from 1 to 20 out of 697 results

article

Anisotropic thermomagnetic effects on the universal stability of a diffusive state in porous media

S. Saravanan, D. Brindha, H. Yamaguchi

ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für... > 101 > 8 > n/a - n/a

A nonlinear study is made to find the influence of transverse anisotropy on the onset of thermomagnetic convection in a homogeneous and rotating porous medium. The medium is filled with a magnetic fluid and is subjected to centrifugal force with alternating directions. Unconditional nonlinear stability bounds are found by exploiting the variational principles. Effects of various parameters on the...

article

Low-active high-density Noctiluca scintillans cells in surface seawater

K. Tada, T. Asahi, S. Kitatsuji, M. Nomura, more

Oceanologia > 2020 > 62 > 3

article

MITA: A Multilayer Ionization-chamber Telescope Array for low-energy reactions with exotic nuclei

N. R. Ma, L. Yang, C. J. Lin, H. Yamaguchi, more

The European Physical Journal A > 2019 > 55 > 6 > 1-11

. We report on the development of a new, portable detector array for charged particles with a low detection threshold to study the reaction mechanisms of exotic nuclear systems at energies around the Coulomb barrier. In order to identify both light and heavy particles simultaneously, the array consists of ten units of $\Delta E$ Δ E - $E_{\mathrm{R}}$ E R telescopes, where each one is...

article

On-Chip Piezoelectric Actuation of Nanomechanical Resonators Containing a Two-Dimensional Electron Gas

A. A. Shevyrin, A. K. Bakarov, A. A. Shklyaev, A. S. Arakcheev, more

JETP Letters > 2019 > 109 > 4 > 261-265

The on-chip piezoelectric actuation is experimentally shown to be a suitable method for driving the resonant vibrations of AlGaAs/GaAs-based nanomechanical resonators containing a two-dimensional electron gas. Both flexural and torsional vibrations of 166 nm-thick cantilevers and doubly clamped beams can be driven using this method at room temperature. At least two points should be addressed when...

article

Is cefmetazole effective like carbapenems to treat ESBL-producing bacterial infections in vivo?

A. Takuma, H. Yamaguchi, T. Soga, N. Fukuumi, more

International Journal of Infectious Diseases > 2019 > 79 > S1 > 53

article

Enrichment of the Hot Intracluster Medium: Observations

F. Mernier, V. Biffi, H. Yamaguchi, P. Medvedev, more

Space Science Reviews > 2018 > 214 > 8 > 1-40

Four decades ago, the firm detection of an Fe-K emission feature in the X-ray spectrum of the Perseus cluster revealed the presence of iron in its hot intracluster medium (ICM). With more advanced missions successfully launched over the last 20 years, this discovery has been extended to many other metals and to the hot atmospheres of many other galaxy clusters, groups, and giant elliptical galaxies,...

article

Study of α-cluster Structure in ²²Mg Using a Radioactive Ion Beam

S. M. Cha, K. Y. Chae, M. J. Kim, M. S. Kwag, more

Journal of the Korean Physical Society > 2018 > 73 > 8 > 1055-1060

The α-clusterization of an atomic nucleus has been studied for a long time, even from the earliest days of nuclear physics. Our understanding of the α-cluster structure is, however, mainly limited to the self-conjugate A = 4n (n = 2, 3, 4, · · · ) light nuclei and some of the neutron-rich radionuclides such as ¹⁰Be, ¹¹B, and ¹⁴C. In order to study the α-cluster structure of a neutron-deficient ²²Mg...

article

Study of ¹⁹F Levels with E_x = 6.7 - 7.7 MeV by the ¹⁵N+α Scattering Experiment

D. Kim, G. W. Kim, S. Y. Park, A. Kim, more

Journal of the Korean Physical Society > 2018 > 73 > 3 > 265-270

The intense γ-rays from classical novae are emitted due to the β-decay of ¹⁸F which is produced by the Hot-CNO cycle. The reaction rate of ¹⁸F(p,α)¹⁵O affects the prediction of the abundance of ¹⁸F. The main contribution to this reaction rate is from the resonances in ¹⁹Ne near and above the proton threshold. Hence, many experiments and theoretical works have been performed on the low-lying ¹⁸F+p...

article

Dietary patterns and colorectal cancer risk in middle-aged adults: A large population-based prospective cohort study

Sangah Shin, Eiko Saito, Norie Sawada, Junko Ishihara, more

Clinical Nutrition > 2018 > 37 > 3 > 1019-1026

A finding between dietary pattern and cancer may provide visions beyond the assessment of individual foods or nutrients. We examined the influence of dietary pattern with colorectal cancer (CRC) among a Japanese population.A total of 93,062 subjects (43,591 men, 49,471 women) who participated in the Japan Public Health Center-based Prospective Study were followed from 1995–1998 to the end of 2012,...

article

Plasma levels of n-3 fatty acids and risk of coronary heart disease among Japanese: The Japan Public Health Center-based (JPHC) study

Kei Hamazaki, Hiroyasu Iso, Ehab S. Eshak, Satoyo Ikehara, more

Atherosclerosis > 2018 > 272 > C > 226-232

Higher intake of fish or n-3 polyunsaturated fatty acids (PUFAs) has been associated with reduced risk of coronary heart disease (CHD). However, it is unclear whether increased blood levels of n-3 PUFAs are associated with reduced risk of CHD in the Japanese population.The relationship between circulating levels of n-3 PUFAs (eicosapentaenoic acid + docosapentaenoic acid + docosahexaenoic acid) and...

article

Superoxide dismutase activity in hip osteoarthritic cartilage significantly decreases in an age-independent manner

M. Koike, H. Nojiri, H. Kanazawa, K. Miyagawa, more

Osteoarthritis and Cartilage > 2018 > 26 > S1 > S186

article

Incidence of anterior disc displacement without reduction of the temporomandibular joint in patients with dentofacial deformity

K. Ooi, N. Inoue, K. Matsushita, H. Yamaguchi, more

International Journal of Oral and Maxillofacial Surgery > 2018 > 47 > 4 > 505-510

The aim of this study was to investigate the incidence of anterior disc displacement without reduction (ADDwoR) of the temporomandibular joint (TMJ) in patients with dentofacial deformity. Eighty-eight female patients (176 joints) with skeletal class III malocclusion and 33 female patients (66 joints) with skeletal class II malocclusion, with or without anterior open bite and asymmetry, were evaluated...

article

Two patients with PNKP mutations presenting with microcephaly, seizure, and oculomotor apraxia

M. Taniguchi‐Ikeda, N. Morisada, H. Inagaki, Y. Ouchi, more

Clinical Genetics > 93 > 4 > 931 - 933

article

Differences in pain thresholds elicited by intraoral electrical stimuli between individuals with and without diabetes mellitus

T. Ogawa, S. Kimoto, Y. Nakashima, N. Furuse, more

Journal of Oral Rehabilitation > 45 > 3 > 235 - 239

There is little evidence of sensation in individuals with diabetes mellitus (DM) in the dental research field. We investigated whether pain thresholds (PTs) differ between individuals with and without DM (non‐DM; NDM). To this end, we assessed whether PTs obtained from the oral cavity, hands, and feet differed from each other and across groups, and whether PTs differed for the three current frequencies...

article

Effect of Rotational Transform on Thermal Transport in Stellarator–Heliotron Plasmas on LHD

H. Yamada, M. Yokoyama, R. Seki, C. Suzuki, more

Journal of Fusion Energy > 2017 > 36 > 6 > 197-203

Experimental evidence that indicates a positive effect of rotational transform on thermal transport has been shown for electron cyclotron heated plasmas on large helical device (LHD). Although this positive dependence was suggested by earlier scaling studies on energy confinement time, there was a concern that rotational transform is strongly correlated with another major non-dimensional parameter,...

article

n-Butyllithium-promoted regioselective elimination of vicinal bis-triflate having an adjacent ether oxygen

N. Kutsumura, K. Shibuya, H. Yamaguchi, T. Saito

Tetrahedron Letters > 2017 > 58 > 43 > 4099-4102

Regioselective elimination of a vicinal bis-triflate having an adjacent ether oxygen functional group has been developed. Considered in the context of our studies of the regioselective elimination of vicinal dibromide, the key to the mechanism involves the electron-withdrawing inductive effect of the neighboring oxygen functional group. Aliphatic vinyl triflate was shown to be effective in Suzuki-Miyaura...

article

Alcohol consumption and bladder cancer risk with or without the flushing response: The Japan Public Health Center‐based Prospective Study

Hiroyuki Masaoka, Keitaro Matsuo, Norie Sawada, Taiki Yamaji, more

International Journal of Cancer > 141 > 12 > 2480 - 2488

The association between alcohol consumption and bladder cancer risk has been insufficiently investigated in East Asian populations, who frequently have the inactive enzyme for metabolizing acetaldehyde. Given that acetaldehyde associated with alcohol consumption is assessed as a carcinogen, consideration of differences in acetaldehyde exposure would aid accuracy in assessing the bladder cancer risk...

article

Smoking and alcohol and subsequent risk of myelodysplastic syndromes in Japan: the Japan Public Health Centre‐based Prospective Study

Tomotaka Ugai, Keitaro Matsuo, Norie Sawada, Motoki Iwasaki, more

British Journal of Haematology > 178 > 5 > 747 - 755

Smoking and alcohol are important modifiable risk factors for human cancers. However, few epidemiological studies have investigated their association with the risk of myelodysplastic syndromes (MDS). Here, we investigated the association of smoking and alcohol consumption and the risk of MDS in a large‐scale population‐based cohort study in Japan. We included 95 510 Japanese subjects (45 451 men and...

article

High serum total cholesterol is associated with suicide mortality in Japanese women

T. Svensson, M. Inoue, N. Sawada, H. Charvat, more

Acta Psychiatrica Scandinavica > 136 > 3 > 259 - 268

Objective To investigate the association between serum total cholesterol (TC) and suicide using a large general population cohort with long follow‐up times. Method Analyses included 16 341 men and 28 905 women aged 40–69 from the Japan Public Health Center‐based Prospective Study followed from 1990 to 2012. TC levels were defined per clinical guidelines: low (<4.66 mmol/l [180 mg/dl]), normal...

article

Conductive heat transfer in a gas confined between two concentric spheres: From free-molecular to continuum flow regime

H. Yamaguchi, M.T. Ho, Y. Matsuda, T. Niimi, more

International Journal of Heat and Mass Transfer > 2017 > 108 > PB > 1527-1534

The conductive heat transfer through a gas confined between two concentric spherical shells maintained at different temperatures is investigated from the free-molecular to the continuum flow regime. The heat flux, measured using a recently proposed experimental system to extract the thermal accommodation coefficient, is compared with analytical expressions and numerical results. From this comparison...

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INFONA - science communication portal

Search results for: H. Yamaguchi

Anisotropic thermomagnetic effects on the universal stability of a diffusive state in porous media

Low-active high-density Noctiluca scintillans cells in surface seawater

MITA: A Multilayer Ionization-chamber Telescope Array for low-energy reactions with exotic nuclei

On-Chip Piezoelectric Actuation of Nanomechanical Resonators Containing a Two-Dimensional Electron Gas

Is cefmetazole effective like carbapenems to treat ESBL-producing bacterial infections in vivo?

Enrichment of the Hot Intracluster Medium: Observations

Study of α-cluster Structure in ²²Mg Using a Radioactive Ion Beam

Study of ¹⁹F Levels with E_x = 6.7 - 7.7 MeV by the ¹⁵N+α Scattering Experiment

Dietary patterns and colorectal cancer risk in middle-aged adults: A large population-based prospective cohort study

Plasma levels of n-3 fatty acids and risk of coronary heart disease among Japanese: The Japan Public Health Center-based (JPHC) study

Superoxide dismutase activity in hip osteoarthritic cartilage significantly decreases in an age-independent manner

Incidence of anterior disc displacement without reduction of the temporomandibular joint in patients with dentofacial deformity

Two patients with PNKP mutations presenting with microcephaly, seizure, and oculomotor apraxia

Differences in pain thresholds elicited by intraoral electrical stimuli between individuals with and without diabetes mellitus

Effect of Rotational Transform on Thermal Transport in Stellarator–Heliotron Plasmas on LHD

n-Butyllithium-promoted regioselective elimination of vicinal bis-triflate having an adjacent ether oxygen

Alcohol consumption and bladder cancer risk with or without the flushing response: The Japan Public Health Center‐based Prospective Study

Smoking and alcohol and subsequent risk of myelodysplastic syndromes in Japan: the Japan Public Health Centre‐based Prospective Study

High serum total cholesterol is associated with suicide mortality in Japanese women

Conductive heat transfer in a gas confined between two concentric spheres: From free-molecular to continuum flow regime

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