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Masatoshi Sato,Yoshiaki Kobayashi,Takayuki Kawamata,Yukio Yasui,Kazunori Suzuki,M. Itoh,Ryoichi Kajimoto,Kazuhiko Ikeuchi,M. Arai,Phillipe Bourges 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
To identify the superconducting symmetry of Fe-based superconductors, we studied effects ofnonmagnetic-impurities on Tc, magnetic excitation spectra 00 and NMR 1/T1 − T curve, whichare sensitive to the relative signs between the order parameters on the disconnected Fermi surfacesin reciprocal space, because the symmetry is closely connected with the pairing mechanism:If the signs are opposite (symmetry S±), the mechanism is considered to be a magneticone, but when the signs are the same (symmetry S++), a novel mechanism is plausible becausethe ordinary phonon mechanism cannot realize the Tc value as high as 55 K found in Ln1111(Ln=lanthanide). Results are as follows: (a) The very small rates of Tc-suppression by impurityatoms M of LnFe1−yMyAs0.89−xF0.11+x (M=Ni, Co, Ru) can be explained only by S++. (b) The00-data for Ba(Fe, Co)2As2 (Tc 23 K) and Ca-Fe-Pt-As crystals seem to be well explained byS++ rather than by S±. (c) The nuclear magnetic resonance data can be consistently understoodby S++, too. These results suggest the S++ symmetry and a novel pairing mechanism, which canbe considered to be related to the elastic softening of C66 induced by the orbital fluctuation of thesystem.
Yukihiko Shirayama,Michio Takahashi,Masatoshi Suzuki,Yoshiaki Tsuruoka,Koichi Sato 대한정신약물학회 2014 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.12 No.3
Objective: This open-label study examined the effects of ramelteon on cognitive functions in 10 outpatients with schizophrenia. Methods: Ramelteon (8 mg/day) was administered to 10 patients with schizophrenia for six months. The verbal fluency test,Trail-Making Test, the Wisconsin Card Sorting Test, the Stroop Test, the Digit Span Distraction Test, Iowa Gambling Task, theRey Auditory Verbal Learning Test were evaluated at baseline and 6 months after treatment with ramelteon. Results: Ramelteon improved significantly the scores of Rey Auditory Verbal Learning Test. Additionally, ramelteon exerted improvementsin the verbal fluency and Iowa Gambling Task in 4 patients. Conclusion: Ramelteon could be a potential therapeutic drug, in adjunctive treatment of learning and memory deficits seenin patients with schizophrenia.
Japanese Kindergarten Teachers' Belief on Intellectual and Social Development
Bernard Spodek,Hiroshi Ashida,Riyo Kadota,Masatoshi Suzuki,Kiyomi Akita,Yutaka Oda,Takako Noguchi 한국유아교육학회 2004 INTERNATIONAL JOURNAL OF EARLY CHILDHOOD EDUCATION Vol.10 No.1
Early childhood education in Japan has traditionally been described by researchers from abroad in dichotomous terms, for example, “individualism vs. collectivism,” “formal and intellectual learning vs. affective learning.” “independence vs. interdependence.” This study illustrates the facilitation of intellectual and social development by Japanese kindergarten teachers not as two opposing ideas, instead, it shows intellectual and social development as complementing each other as children develop intelligence and independence.Building on Tobin’s methodology and video recording of kindergartens, a new approach portrays teachers’ personal philosophies on early childhood education and instruction. Although the methodology can and will be improved, its basic validity has been affirmed.
Hasib Maruf Mohammad,Yamada Kentaro,Hoshino Masatoshi,Yamada Eiji,Tamai Koji,Takahashi Shinji,Suzuki Akinobu,Toyoda Hiromitsu,Terai Hidetomi,Nakamura Hiroaki 대한척추외과학회 2021 Asian Spine Journal Vol.15 No.4
Study Design: Retrospective radiological comparative design.Purpose: To investigate whether conventional magnetic resonance imaging (MRI) could substitute three-dimensional (3D)-MRI for the calculation of the foraminal stenotic ratio (FSR) and clarification of which patients can be assessed more accurately using 3D-MRI.Overview of Literature: Previous studies have indicated that 3D-MRI is useful for diagnosing lumbar foraminal stenosis. The FSR obtained using 3D-MRI, described as the ratio of stenosis length, characterized by perineural fat obliteration, to the length of the entire foramen, could indicate the stenosis severity; however, this method is time-consuming and expensive. The FSR also can be calculated using conventional MRI.Methods: We investigated 154 foramina at L5–S1 in 77 patients. All the patients had degenerative lumbar disorders and had undergone both conventional MRI and 3D-MRI during the same visit. Differences between the FSRs calculated from conventional and 3D-MRI reconstructions and any correlations with the plain radiography findings were assessed.Results: In foramina that had a FSR of <50% on conventional MRI, the difference between the FSR obtained using conventional MRI and 3D-MRI was 5.1%, with a correlation coefficient of 0.777. For foramina with a FSR ≥50% on conventional MRI, the difference was 20.2%, with a correlation coefficient of 0.54. FSR obtained using 3D-MRI was significantly greater in patients who required surgery than in those who were successfully treated with conservative methods (88% and 42%, respectively). Segments with spondylolisthesis or lateral wedging showed higher FSRs than those without these conditions on both types of MRI.Conclusions: FSRs <50% obtained using conventional MRI were sufficiently reliable; however, the results were inaccurate for FSRs ≥50%. Patients with high FSRs on 3D-MRI were more likely to require surgical treatment. Therefore, 3D-MRI is recommended in patients with suspected stenosis detected using conventional MRI or plain radiographs.
Ishimura, Shota,Kim, Byung Gon,Tanaka, Kazuki,Nishimura, Kosuke,Kim, Hoon,Chung, Yun C.,Suzuki, Masatoshi IEEE 2018 IEEE photonics journal Vol.10 No.1
<P>We demonstrate a broadband and long-distance intermediate frequency-over-fiber (IFoF) transmission scheme employing a transmitter composed of parallel intensity/phase (IM/PM) modulators with appropriate bandwidth allocations to IM and PM. Due to the proposed scheme, we can eliminate all the null frequencies caused by dispersion-induced RF power fading, which, in turn, enables us to significantly increase the available bandwidth. In addition, our system does not require any synchronization between IM and PM, which reduces complexity compared to conventional parallel transmitter architecture. We successfully transmitted 20 <TEX>$\times$</TEX> 360 MHz filtered orthogonal-frequency-division-multiplexed signals corresponding to a common public radio interface equivalent data rate of 524.28 Gbps over a 30- and 40-km single-mode fiber satisfying the 8% threshold for the error-vector magnitude values for all the subcarriers. These results show that our proposed IFoF transmission scheme is scalable to long-distance mobile fronthaul links for 5G and beyond.</P>