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홋카이도 남부 Warm Core Ring의 탄성파 반사법 영상화
( Mikiya Yamashita ),( Kanako Yokota ),( Yoshio Fukao ),( Shuichi Kodaira1 ),( Seiichi Miura1 ),( Katsuro Katsumata ) 한국지구물리·물리탐사학회 2011 지구물리와 물리탐사 Vol.14 No.1
A multi-channel seismic reflection (MCS) survey was conducted in 2009 to explore the deep crustal structure of the Pacific Plate south of Hokkaido. The survey line happened to traverse a 250-km-wide Warm Core Ring (WCR), a current eddy that had been generated by the Kuroshio Extension. We attempted to use these MCS data to delineate the WCR fine structure. The survey line consists of two profiles: one with a shot interval of 200mand the other with a shot interval of 50m. Records from the denser shot point line show much higher background noise than the records from the sparser shot point line. We identified the origin of this noise as acoustic reverberations between the sea surface, seafloor and subsurface discontinuities, from previous shots. Results showed that a prestack migration technique could enhance the signal buried in this background noise efficiently, if the sound speed information acquired from concurrent temperature measurements is available. The WCR is acoustically an assemblage of concave reflectors dipping inward, with steeper slopes (~2°) on the ocean side and gentler slopes (~1°) on the coastal side. Within the WCR, we recognised a 30-km-wide lens-shaped structure with reflectors on the perimeter.
HYERS-ULAM-RASSIAS STABILITY OF THE BANACH SPACE VALUED LINEAR DIFFERENTIAL EQUATIONS y′ = λy
Miura, Takeshi Miura,Jung, Soon-Mo,Takahasi, Sin-Ei Korean Mathematical Society 2004 대한수학회지 Vol.41 No.6
The aim of this paper is to prove the stability in the sense of Hyers-Ulam- Rassias of the Banach space valued differentialequation y' = λy, where λ is a complex constant. That is, suppose f is a Banach space valued strongly differentiable function on an open interval. If f is an approximate solution of the equation y' = λy, then there exists an exact solution of the equation near to f.
Miura, Kenji,Jin, Jing Bo,Lee, Jiyoung,Yoo, Chan Yul,Stirm, Vicki,Miura, Tomoko,Ashworth, Edward N,Bressan, Ray A,Yun, Dae-Jin,Hasegawa, Paul M Americ 2007 The Plant cell Vol.19 No.4
<P>SIZ1 is a SUMO E3 ligase that facilitates conjugation of SUMO to protein substrates. siz1-2 and siz1-3 T-DNA insertion alleles that caused freezing and chilling sensitivities were complemented genetically by expressing SIZ1, indicating that the SIZ1 is a controller of low temperature adaptation in plants. Cold-induced expression of CBF/DREB1, particularly of CBF3/DREB1A, and of the regulon genes was repressed by siz1. siz1 did not affect expression of ICE1, which encodes a MYC transcription factor that is a controller of CBF3/DREB1A. A K393R substitution in ICE1 [ICE1(K393R)] blocked SIZ1-mediated sumoylation in vitro and in protoplasts identifying the K393 residue as the principal site of SUMO conjugation. SIZ1-dependent sumoylation of ICE1 in protoplasts was moderately induced by cold. Sumoylation of recombinant ICE1 reduced polyubiquitination of the protein in vitro. ICE1(K393R) expression in wild-type plants repressed cold-induced CBF3/DREB1A expression and increased freezing sensitivity. Furthermore, expression of ICE1(K393R) induced transcript accumulation of MYB15, which encodes a MYB transcription factor that is a negative regulator of CBF/DREB1. SIZ1-dependent sumoylation of ICE1 may activate and/or stabilize the protein, facilitating expression of CBF3/DREB1A and repression of MYB15, leading to low temperature tolerance.</P>
Advanced Powder Processing Techniques of Ti Alloy Powders for Medical and Aerospace Applications
Miura, Hideshi The Korean Powder Metallurgy Institute 2013 한국분말재료학회지 (KPMI) Vol.20 No.5
In this paper, two kinds of advanced powder processing techniques Metal Injection Molding (MIM) and Direct Laser Forming (DLF) are introduced to fabricate complex shaped Ti alloy parts which are widely used for medical and aerospace applications. The MIM process is used to strengthen Ti-6Al-4V alloy compacts by addition of fine Mo, Fe or Cr powders. Enhanced tensile strength of 1030 MPa with 15.1% elongation was obtained by an addition of 4 mass%Cr because of the microstructural modification and also the solution strengthening in beta phase. However, their fatigue strength was lower compared to wrought materials, but was improved by HIP. Subsequently, the effect of feeding layer height (FLH) on the characteristics of the DLF compacts was investigated. In the case of 100 ${\mu}m$ FLH, surface roughness was improved and nearly full density (99.8%) was obtained. Also, tensile strength of 1080 MPa was obtained, which is higher than the ASTM value.
DEVELOPMENT OF POSITION-SENSITIVE PROTON RECOIL TELESCOPE (PSPRT)
Miura, Takako,Baba, Mamoru,Kawata, Naoki,Sanami, Toshiya 대한방사선 방어학회 2001 방사선방어학회지 Vol.26 No.3
We have developed a position-sensitive proton recoil telescope(PSPRT) which employs a position-sensitive photomultiplier (PS-PMT) and a scintillator for both a radiator and a proton-detector. This system is expected to achieve high energy resolution under a large solid angle, because it enables to obtain the information not only on the proton energy but also the recoil angle from the position data for both detectors. The response of the PSPRT for 14.1 MeV mono-energetic neutrons was measured, and the PSPRT proved to be operating as expected.
Development of High-Performance Nox Sensors Based on Solid Electrolytes
MIURA, Norio 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1
Three types of high-performance solid-electrolyte devices for detecting NO_(x) in the combustion exhausts or in ambient environments were proposed and investigated. First, a mixed-potential type device for the selective detection of NO_(x) was designed by using stabilized zirconia and oxide electrode. The mixed oxide, CdCr_(2)O_(4), was found to be best suited for the sensing electrode among the tested oxides. The obtained device gave rapid and selective responses to NO_(x) in air at 550°C. The sensing mechanism of the sensor was confirmed to involve a mixed potential at the oxide electrode. Secondly, a zirconia-based device using oxide electrode was developed for amperometric detection of NO at high temperature. The obtained CdCr_(2)O_(4)-attached device showed quick and selective response to NO at 500°C. Lastly, a novel solid-state amperometric sensor for NO_(2) measurements was developed by combining the Na^(+)conductor (NASICON) based device with the NaNO_(2) layer which was deposited on the counter electrode. The current response was linear to the NO_(2) concentration in the range 10 ppb - 1 ppm at 150°C. The NO_(2) sensitivity was hardly or only slightly affected by variations in the concentration of coexistent CO_(2), H_(2)O or O_(2).
Miura Kousei,Kadone Hideki,Abe Tetsuya,Koda Masao,Funayama Toru,Noguchi Hiroshi,Kumagai Hiroshi,Nagashima Katsuya,Mataki Kentaro,Shibao Yosuke,Sato Kosuke,Kawamoto Hiroaki,Sankai Yoshiyuki,Yamazaki Ma 대한척추외과학회 2021 Asian Spine Journal Vol.15 No.1
Study Design: Prospective experimental study in humans.Purpose: To determine whether the hybrid assistive limb (HAL) for Care Support can reduce lumbar load during a patient transfer.Overview of Literature: The prevalence of work-related low back pain (LBP) among nurses is high. In particular, transferring patients poses a high risk for LBP due to the large lumbar load. Attempts to reduce the lumbar load are crucial to avoid the risk of LBP. Therefore, we investigated the effects of the HAL for Care Support.Methods: Nineteen volunteers (16 men, three women) lifted a 60-kg doll from a seated position to a standing position. The first transfer was performed without the HAL for Care Support, and the second was performed with the HAL for Care Support assistive robot. We evaluated transfer performance, the visual analog scale (VAS) score for lumbar fatigue, and electromyogram analyses of the trunk and hip.Results: Four participants (two men, two women) succeeded with the HAL for Care Support even though they were unable to perform the task without it. The mean lumbar fatigue VAS score for all participants without the HAL for Care Support was 62 mm, while that with it was 43 mm. With lumbar assistance from the HAL for Care Support, subjective lumbar fatigue during the transfer decreased significantly. A power analysis indicated adequate statistical power to detect a difference in the VAS score for lumbar fatigue (0.99). The activity of the left gluteus maximus alone increased significantly during transfers with the HAL for Care Support. No adverse events occurred during use of the HAL for Care Support for transfers.Conclusions: The HAL for Care Support was able to reduce lumbar load in a simulated patient transfer.
The Arabidopsis SUMO E3 ligase SIZ1 controls phosphate deficiency responses.
Miura, Kenji,Rus, Ana,Sharkhuu, Altanbadralt,Yokoi, Shuji,Karthikeyan, Athikkattuvalasu S,Raghothama, Kashchandra G,Baek, Dongwon,Koo, Yoon Duck,Jin, Jing Bo,Bressan, Ray A,Yun, Dae-Jin,Hasegawa, Paul National Academy of Sciences 2005 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.102 No.21
<P>Plants sense phosphate (Pi) deficiency and initiate signaling that controls adaptive responses necessary for Pi acquisition. Herein, evidence establishes that AtSIZ1 is a plant small ubiquitin-like modifier (SUMO) E3 ligase and is a focal controller of Pi starvation-dependent responses. T-DNA insertional mutated alleles of AtSIZ1 (At5g60410) cause Arabidopsis to exhibit exaggerated prototypical Pi starvation responses, including cessation of primary root growth, extensive lateral root and root hair development, increase in root/shoot mass ratio, and greater anthocyanin accumulation, even though intracellular Pi levels in siz1 plants were similar to wild type. AtSIZ1 has SUMO E3 ligase activity in vitro, and immunoblot analysis revealed that the protein sumoylation profile is impaired in siz1 plants. AtSIZ1-GFP was localized to nuclear foci. Steadystate transcript abundances of Pi starvation-responsive genes AtPT2, AtPS2, and AtPS3 were moderate but clearly greater in siz1 seedlings than in wild type, where Pi is sufficient. Pi starvation induced the expression of these genes to the same extent in siz1 and wild-type seedlings. However, two other Pi starvation-responsive genes, AtIPS1 and AtRNS1, are induced more slowly in siz1 seedlings by Pi limitation. PHR1, a MYB transcriptional activator of AtIPS1 and AtRNS1, is an AtSIZ1 sumoylation target. These results indicate that AtSIZ1 is a SUMO E3 ligase and that sumoylation is a control mechanism that acts both negatively and positively on different Pi deficiency responses.</P>