Masaoki Kimura

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BACKGROUND Leukocyte telomere length (LTL) is considered a biomarker of human aging and based on cross-sectional studies it shortens with age. However, longitudinal studies reported that many adults display LTL lengthening. METHODS Using Southern blots, we compared cross-sectional rates of age-related LTL change across a ∼20 year age range with those(More)
The OPERA neutrino experiment at the underground Gran Sasso Laboratory has measured the velocity of neutrinos from the CERN CNGS beam over a baseline of about 730 km with much higher accuracy than previous studies conducted with accelerator neutrinos. The measurement is based on high-statistics data taken by OPERA in the years 2009, 2010 and 2011. Dedicated(More)
The southwestern Ryukyu area east of Taiwan Island is an arcuate boundary between Philippine Sea Plate and Eurasian Plate. The topographic features in the area are characterised by (1) a large-scale amphitheatre off Ishi-gaki Island, just on the estimated epicentre of the tsunami-genic earthquake in 1771, (2) lots of deep sea canyons located north of the(More)
A (K,Na)NbO<inf>3</inf> (KNN)-based multilayer piezoelectric ceramic with nickel inner electrodes was successfully fabricated by co-firing in a reducing atmosphere. We studied the compositional modification of KNN in order to increase reducing resistance in the sintering process, and obtained a good composition by using a solid solution with(More)
The high-power piezoelectric characteristics in c-axis oriented ceramics of bismuth layer structured ferroelectrics (BLSF), SrBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> (SBN), Bi<sub>4</sub>Ti<sub>3</sub>O<sub>12</sub> (BIT) and CaBi<sub>4</sub>Ti<sub>4</sub>O<sub>15</sub> (CBT), were studied by constant voltage driving method. These textured ceramics were(More)
Introduction: Ca-Tschermak (hereafter CaTs), CaAl 2 SiO 6 , component has been one of the most important hypothetical members of pyroxene, and CaTs-rich pyroxene was abundantly reported from refractory inclusions in carbonaceous chondrites [e.g., 1]. However, the nature of such pyroxene has not been characterized in detail because of their tiny grain size.(More)
Introduction: Amoeboid olivine aggregates (AOA) are aggregates of olivine grains that condensed in the solar nebula. Therefore, by studying these aggregates we may understand condensation processes in the early solar nebula. Although many studies on AOAs have been made [e.g. 1], many unsolved issues still remain. For instance, we do not know whether olivine(More)
BACKGROUND To clarify the influence of hypertension and blood pressure (BP) control on thromboembolism and major hemorrhage in patients with nonvalvular atrial fibrillation, a post hoc analysis of the J-RHYTHM Registry was performed. METHODS AND RESULTS A consecutive series of outpatients with atrial fibrillation was enrolled from 158 institutions. Of(More)
Introduction: Deciphering the origin and thermal histories of chondrules, metal and other components in chondrites is essential to our understanding of the early solar system. The unusual characteristics of the CB chondrites have generated considerable interest and disagreement over the origin and significance of their components. Their unusual(More)