Advanced search    

Search: authors:"Takashi Nakamura"

134 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Changing Mechanisms of Surface Relief and the Damage Evaluation of Low Cycle Fatigued Austenitic Stainless Steel

To quantitatively investigate the cause of the changes in arithmetic mean roughness Ra and arithmetic mean waviness Wa of austenitic stainless steel under low-cycle fatigue loading, precise observation focusing on persistent slip bands (PSBs) and crystal grain deformations was conducted on SUS316NG. During the fatigue tests, the specimen’s surface topography was regularly...

Extranodal spread of primary and secondary metastatic nodes: The dominant risk factor of survival in patients with head and neck squamous cell carcinoma

appreciate Junya Miyamoto for his assistance in statistical analysis. 12 / 14 Author Contributions Conceptualization: Takashi Nakamura. Data curation: Misa Sumi. Formal analysis: Misa Sumi, Shuntaro Sato ... . Investigation: Misa Sumi, Takashi Nakamura. Methodology: Misa Sumi. Project administration: Takashi Nakamura. Supervision: Takashi Nakamura. Validation: Shuntaro Sato. Visualization: Misa Sumi. Writing

Combined classification system based on ACR/EULAR and ultrasonographic scores for improving the diagnosis of Sjögren's syndrome

ACR-based SS diagnosis. P-values <0.05 were considered statistically significant (bold values). (DOCX) 13 / 15 Author Contributions Conceptualization: Takashi Nakamura. Data curation: Yukinori ... . Project administration: Takashi Nakamura. Supervision: Atsushi Kawakami, Takashi Nakamura. Validation: Misa Sumi. Visualization: Takashi Nakamura. Writing ± original draft: Takashi Nakamura. Writing

Molecular recognition by multiple metal coordination inside wavy-stacked macrocycles

Science (TIMS), University of Tsukuba, 1-1-1 Tennodai, Ibaraki, Tsukuba, 305-8571, JapanTakashi Nakamura, Yuya Kaneko, Eiji Nishibori & Tatsuya Nabeshima AuthorsSearch for Takashi Nakamura in:Nature

Perfusion MR imaging detection of carcinoma arising from preexisting salivary gland pleomorphic adenoma by computer-assisted analysis of time-signal intensity maps

Tumor perfusion can be evaluated by analyzing the time-signal intensity curve (TIC) after dynamic contrast-enhanced (DCE) MR imaging. Accordingly, TIC profiles are characteristic of some benign and malignant salivary gland tumors. A carcinoma ex pleomorphic adenoma (CXPA) arises from a long-standing pleomorphic adenoma (PA) and has a distinctive prognostic risk depending on the...

Gravitational wave quasinormal mode from Population III massive black hole binaries in various models of population synthesis

Nakamura 0 Subject Index 0 Department of Physics, Kyoto University , Kyoto 606-8502 , Japan 1 Institute for Cosmic Ray Research, The University of Tokyo , Chiba 277-8582 , Japan

Selberg’s orthonormality conjecture and joint universality of L-functions

, Voronin [22] discovered the so-called universality property, which is one of the most remarkable result concerning the value-distribution of ζ (s). The modern version states that Takashi Nakamura was

How close can we approach the event horizon of the Kerr black hole from the detection of gravitational quasinormal modes?

Using the Wentzel–Kramers–Brillouin method, we show that the peak location ($r_{\rm peak}$) of the potential, which determines the quasinormal mode frequency of the Kerr black hole, obeys an accurate empirical relation as a function of the specific angular momentum $a$ and the gravitational mass $M$. If the quasinormal mode with $a/M \sim 1$ is observed by gravitational wave...

Formation of the chaperonin complex studied by 2D NMR spectroscopy

expression plasmid (pETESwild). Author Contributions Conceptualization: Koichi Kato, Kunihiro Kuwajima. Data curation: Toshio Takenaka, Takashi Nakamura. Formal analysis: Toshio Takenaka, Takashi Nakamura ... . Funding acquisition: Koichi Kato, Kunihiro Kuwajima. 12 / 15 Investigation: Toshio Takenaka, Takashi Nakamura, Saeko Yanaka, Maho Yagi-Utsumi, Mahesh S. Chandak, Kazunobu Takahashi, Subhankar Paul, Koki

Relationship between plasma xanthine oxidoreductase activity and left ventricular ejection fraction and hypertrophy among cardiac patients

, Takahide Ito, Koichi Sohmiya, Masaaki Hoshiga. Methodology: Takayo Murase, Takashi Nakamura, Takahide Ito, Koichi Sohmiya, Masaaki Hoshiga. Project administration: Nobukazu Ishizaka. 9 / 12 10 / 12

Estimate of the radius responsible for quasinormal modes in the extreme Kerr limit and asymptotic behavior of the Sasaki–Nakamura transformation

The Sasaki–Nakamura transformation gives a short-ranged potential and a convergent source term for the master equation of perturbations in the Kerr space-time. In this paper, we study the asymptotic behavior of the transformation, and present a new relaxed necessary and sufficient condition for the transformation to obtain the short-ranged potential in the assumption that the...

Gorlin syndrome-derived induced pluripotent stem cells are hypersensitive to hedgehog-mediated osteogenic induction

Nakamura, Akira Yamaguchi, Toshifumi Azuma. Data curation: Daigo Hasegawa, Hiromi Ochiai-Shino, Shoko Onodera, Takashi Nakamura, Akiko Saito, Katsuhito Watanabe, Kenjiro Kosaki, Toshifumi Azuma. Funding ... acquisition: Hiromi Ochiai-Shino. Investigation: Daigo Hasegawa, Takashi Nakamura, Akira Yamaguchi, Takahiko Shibahara, Toshifumi Azuma. Methodology: Hiromi Ochiai-Shino, Takashi Nakamura, Ken Nishimura

Possible confirmation of the existence of the ergoregion by the Kerr quasinormal mode in gravitational waves from a Population III massive black hole binary

The existence of the ergoregion of the Kerr space-time has not yet been confirmed observationally. We show that the confirmation would be possible by observing the quasinormal mode in gravitational waves. As an example, using the recent population synthesis results of Population III (Pop III) binary black holes, we find that the peak of the final merger mass ($M_f$) is about $50...

The detection of quasinormal mode with a/M = 0.95 would prove a sphere 99% soaking in the ergoregion of the Kerr space-time1

Recent numerical relativity simulations of mergers of binary black holes suggest that the maximum final value of $a/M$ is ${\sim }0.95$ for the coalescence of two equal-mass black holes with aligned spins of the same magnitude $a/M=0.994$, which is close to the upper limit $a/M=0.998$ of accretion spin-up shown by Thorne [Astrophys. J. 191, 507 (1974)]. Using the Wentzel–Kramers...

A multicenter, retrospective, observational study of the clinical outcomes and risk factors for relapse of ulcerative colitis at 1 year after leukocytapheresis

from Asahi Kasei Medical Co. Ltd., and JIMRO Co. Ltd.; Takashi Nakamura, Tomoko Ino, Toyoko Numata, Hiroshi Shibata, Hirofumi Aoki, and Yoshihiro Matsuno are employees of Asahi Kasei Medical Co. Ltd

Pannexin 3 regulates proliferation and differentiation of odontoblasts via its hemichannel activities

Highly coordinated regulation of cell proliferation and differentiation contributes to the formation of functionally shaped and sized teeth; however, the mechanism underlying the switch from cell cycle exit to cell differentiation during odontogenesis is poorly understood. Recently, we identified pannexin 3 (Panx3) as a member of the pannexin gap junction protein family from...

Podocyte Injury and Albuminuria in Experimental Hyperuricemic Model Rats

Although hyperuricemia is shown to accelerate chronic kidney disease, the mechanisms remain unclear. Accumulating studies also indicate that uric acid has both pro- and antioxidant properties. We postulated that hyperuricemia impairs the function of glomerular podocytes, resulting in albuminuria. Hyperuricemic model was induced by oral administration of 2% oxonic acid, a uricase...

Experimental analysis of neutron and background gamma-ray energy spectra of 80-400 MeV 7Li(p,n) reactions under the quasi-monoenergetic neutron field at RCNP, Osaka University

To develop the 100-400 MeV quasi-monoenergetic neutron field, we measured neutron and unexpected gamma-ray energy spectra of the 7Li(p,n) reaction with 80-389 MeV protons in the 100-m time-of-flight (TOF) tunnel at the Research Center for Nuclear Physics (RCNP) cyclotron facility. Neutron energy spectra with energies above 3 MeV were measured by the TOF method, which had been...