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Jiro Yonezaki,Maki Ikeda 한국재활복지공학회 2019 한국재활복지공학회 학술대회논문집 Vol.2019 No.11
SMART seating Systems for PD was researched and developed in Osaka city Rehabilitation Center Assistive Technology Department as a new seating system for postural instability and movement disabilities due to Parkinson’s disease. We will explain to outline of this system and report case studies.
Jiro Watari,Toshihiko Tomita,Katsuyuki Tozawa,Tadayuki Oshima,Hirokazu Fukui,Hiroto Miwa 거트앤리버 소화기연관학회협의회 2020 Gut and Liver Vol.14 No.3
Whether Helicobacter pylori eradication actually reduces the risk of metachronous gastric cancer (MGC) development remains a controversial question. In this review, we addressed this topic by reviewing the results of clinical investigations and molecular pathological analyses of the roles of H. pylori eradication and aspirin administration in the prevention of MGC. In regard to the clinical studies, the results of meta-analyses and randomized control trials differ from those of retrospective studies: the former trials show that H. pylori eradication has a preventive effect on MGC, while the latter studies do not. This discrepancy may be at least partly attributable to differences in the follow-up periods: H. pylori eradication is more likely to prevent MGC over a long-term follow-up period (≥5 years) than over a short-term follow-up period. In addition, many studies have shown that aspirin may have an additive effect on MGC-risk reduction after H. pylori eradication has been achieved. Both H. pylori eradication and aspirin use induce molecular alterations in the atrophic gastritis mucosa but not in the intestinal metaplasia. Unfortunately, the molecular pathological analyses of these interventions have been limited by short follow-up periods. Therefore, a long-term prospective cohort is needed to clarify the changes in molecular events caused by these interventions.
Jiro Abe,Masafumi Kobune,Tetsuo Yazawa 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
High-density (Bi0:5Na0:5TiO3)0:94(BaTiO3)0:06 (BNBT-6) ceramics were fabricated under varying oxygen partial pressure conditions to develop useful lead-free piezoelectric materials with high mechanical quality factors (Qm). In uence of oxygen partial pressure-controlled sintering on physical properties of BNBT-6 ceramics was investigated. A liquid phase occurred in the sample sintered under logP(O2) = 3.50 atm because part of the Bi, a highly volatile element, evaporated from the sample surface during sintering. The mechanical quality factor, Qm, for the radial vibration mode exhibited a maximum (= 270) at logP(O2) = 3.50 atm that was 1.4 times as large as that of the sample sintered at logP(O2) = 0.12 atm. The temperature coecients of resonant and antiresonant frequencies (TCFfr1 and TCFfa1) of the BNBT-6 sample sintered under logP(O2) = 3.50 atm were almost constant: TCFfr1 = 465 ppm/C for the fundamental resonant frequency and TCFfa1 = 381 ppm/C for the fundamental antiresonant frequency. The current technology produces a substantial improvement in Qm characteristics without lowering other piezoelectric parameters, such as relative permittivity, "r, and electromechanical coupling factors, kp and kt, and can be expected to extend the selectivity of electrode materials used in multilayer ceramic actuators.
Jiro, Otsubo,Shigeru, Mariko,Ichiroku, Hayashi The Ecological Society of Korea 2010 Journal of Ecology and Environment Vol.33 No.2
Betula platyphylla var. japonica and Betula ermanii segregate vertically at an elevation of approximately 1,850 m on Mt. Neko in Nagano Prefecture, Japan. B. platyphylla var. japonica and B. ermanii were the dominant species below and above this altitude, at which the mean-annual and growing-season air temperatures were $4^{\circ}C$ and $14.1^{\circ}C$, respectively. Based on a modification of Kira's warmth index which employs cumulative temperature represented as $^{\circ}C$ day, leaf unfolding in both species was observed to be initiated at $58^{\circ}C$ day and $169^{\circ}C$ day, respectively. In 1996, leaf unfolding was initiated on 18 May in B. platyphylla var. japonica (+/-6 days) and on 5 June in B. ermanii (+/-8 days), shortly after the last frost which occurred on 5 May 1995 above 1,850 m; below this elevation there was no risk of frost at the time. At elevations above 1,850 m, the unfolded leaves of B. platyphylla were damaged by late frost, while B. ermanii escaped injury because the leaves were still protected by winter buds. The optimum temperature for seed germination in both B. platyphylla and B. ermanii was $30^{\circ}C$. Temperature alternation from 10 to $30^{\circ}C$ and moist storage of seeds at $4^{\circ}C$ (stratification) prior to incubation increased germination rates in both species. The seedlings of B. ermanii had a greater survival rates than those of B. platyphylla var. japonica when planted above 1,850 m. Comparisons of the timing of leaf unfolding and the latest frost at a site appeared to be the main factors affecting the vertical distribution of these species.
Jiro Abe,Hiroshi Masumoto,Kazuya Kitada,Masafumi Kobune,Takashi Goto,Tetsuo Yazawa 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.2I
High-density (1.x)(Na0.5K0.5)NbO3-xLiTaO3 [(1.x)NKN.xLT] ceramics with x = 0 . 0.2 were successfully fabricated by spark-plasma sintering (SPS). The effect of SPS on the microstructure and the piezoelectric properties of the fabricated NKN-LT ceramics are discussed and compared with those of the same NKN-LT ceramics prepared by conventional mixed-oxide ceramic processing. The morphotropic phase boundary (MPB) between the orthorhombic and tetragonal phases for the NKN-LT series was found to be in the vicinity of x = 0.06 . 0.08. The MPB was shifted to the slightly LT-rich side of that previously reported by excess addition of 2.5 mol% K2CO3. The dielectric, ferroelectric and piezoelectric properties of the NKN-LT ceramics fabricated by using the SPS process were excellent compared to those for the conventionally prepared sample. The values of "T 33/"0, kp and Pr were 1.9, 1.4 and 2.3 times larger than the values for the conventionally prepared sample, respectively. These improvements in the ferroelectric and piezoelectric properties of the present ceramics are shown to originate from both the slight excess addition of K2CO3 and the particle orientation imparted by SPS.