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

홋카이도 남쪽 태평양 판의 심부 지각 구조를 규명하기 위해 다중채널 탄성파 반사법 탐사가 2009년에 수행되었다. 탐사 측선은 250km 넓이의 WCR을 가로지르며, 쿠로시오 속류에 의해 생성된 난류가 흐르는 지역에 위치한다. 본 논문에서는 다중채널 탄성파 반사법 자료를 사용하여 WCR의 세부 구조를 규명하고자 하였다. 탐사 측선은 2개의 프로파일로 구성되는데, 그 중 하나는 송신원 간격이 200미터이고, 다른 하나는 50미터 간격이다. 밀집된 송신원을 갖는 측선의 기록자료가 성긴 송신원 측선의 기록자료보다 배경 잡음이 훨씬 많은 것을 관찰할 수 있다. 이 잡음의 발생원은 이전 송신원으로부터 발생한 해수면과 해저면, 그리고 지하 불연속면 사이의 음향 다중반향음으로 확인되었다. 음파 속도 정보가 동시에 수행하는 온도 측정으로부터 구해질 수 있다면 중합전 구조보정 기술을 통해 배경잡음에 묻혀 있는 신호를 효과적으로 강조할 수 있음을 알 수 있었다. WCR은 음향학적으로 볼 때 해양쪽으로 급경사(~2°)이고 해변쪽으로 완경사(~1°)인 오목한 반사면들의 집합체라고 할 수 있다. WCR 내부에서 30km 넓이의 반사면들로 둘러싸인 렌즈 형태의 구조를 확인할 수 있었다. 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.

SIZ1-mediated sumoylation of ICE1 controls CBF3/DREB1A expression and freezing tolerance in Arabidopsis.

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>

The American Revolution Considered as an Economic Movement

Miura, Susumu 한국아메리카학회 1976 美國學論集 Vol.9 No.-

MOSFET Model HiSIM Based on Surface-Potential Description for Enabling Accurate RF-CMOS Design

Miura-Mattausch, M.,Mattausch, H.J.,Ohguro, T.,Iizuka, T.,Taguchi, M.,Kumashiro, S.,Miyamoto, S. The Institute of Electronics and Information Engin 2004 Journal of semiconductor technology and science Vol.4 No.3

The origin of the phenomena, obstructing circuit performance in the RF operating regime, as well as their modeling will be discussed. The applied surface-potential-based modeling allows self-consistent description of all phenomena important for accurate circuit simulation, as demonstrated with the MOSFET model HiSIM.

Establishment of Laser Sintering Technique for Titanium Powder

Miura Hideshi,Takemasu Teruie,Uemura Makoto,Otsu Masaaki 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1

This paper investigates the characteristic of single-layered and multi-layered compacts made by selective laser sintering using titanium powder (TILOP45 and TILOP150, Sumitomo Titanium Corp.) There were few defects in smooth surface of laser sintered specimen in vacuum as compared to the laser sintered specimen in argon. Maximum tensile strength of singlelayered compact was about 200MPa. Multi-layered compacts show the density of around 75% and the adhesive bonding was not observed between layers, resulted in 70MPa of maximum bending strength and 50MPa of maximum tensile strength.

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.

Use of Movies for Young English Language Learners in School Education

Miura. Hiroko 영상영어교육학회 2015 영상영어교육 (STEM journal) Vol.16 No.1

The aim of this study is to examine how movies can be used for young English language learners in Japanese school education. With public elementary schools as the target, teaching materials for English, especially DVDs of movies, are the focus. Teachers currently receive materials based on a supplementary textbook from the Ministry of Education, Culture, Sports, Science and Technology (MEXT). Among the materials, CDs are extensively used in classes but only 23.1 percent of teachers report using the DVDs. In this paper, Japanese educational settings will be described to establish an understanding of the English teaching environment. Next, ways of using movies effectively will be investigated and examples of how to conduct classes using specific movies presented. All movies chosen contained children in the same age range of the target students. Movies can be used to teach proper behavior, recall words that students have already learned, deal with moral education and learn classroom English. Teachers can adjust the difficulty of tasks to their students’ language level. Although excellent materials for language classes, finding appropriate movies that match lesson aims remains difficult. To solve this problem, teacher collaboration is necessary to create a list of movies for teaching specific lessons in the elementary school context.

A New PIM Joining Process

Miura, Hideshi The Korean Powder Metallurgy Institute 2002 한국분말재료학회지 (KPMI) Vol.9 No.4

A new PIM in-process joining technique has been developed for more complicated and functional PIM components by application of the exuded wax from the green compacts during solvent debinding step. At first, various stainless steels and iron compacts with rectangular shape were combined, and the joining behaviors and properties were investigated by shear and tensile test, and microscopic observation. Subsequently, perfect joined three pieces of thin and hollow compacts were obtained for the combination of same and different stainless steels, and it was difficult to join the iron and stainless steel compacts in hydrogen atmosphere because of the different starting temperature of shrinkage. However, pretty good joined iron and stainless steel compacts were obtained by consideration of particle size and vacuum atmosphere. Finally, for the combination of ferro-silicon and austenitic stainless steel compacts, high functionality (magnetic (1.60Tes1a) & non-magnetic) and perfect joint were obtained.

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).