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Stress analysis with arbitrary body force by triple-reciprocity BEM
Ochiai, Y.,Kobayashi, T. Techno-Press 2000 Structural Engineering and Mechanics, An Int'l Jou Vol.10 No.4
Linear stress analysis without body force can be easily solved by means of the boundary element method. Some cases of linear stress analysis with body force can also be solved without a domain integral. However, domain integrals are generally necessary to solve the linear stress problem with arbitrary body forces. This paper shows that the linear stress problem with arbitrary body forces can be solved approximately without a domain integral by the triple-reciprocity boundary element method. In this method, the distribution of arbitrary body forces can be interpolated by the integral equation. A new computer program is developed and applied to several problems.
Probing Insulator-quantum Hall Transitions by Current Heating
Kuang Yao Chen,N. Aoki,Y. Ochiai,K. A. Cheng,Li-Hung Lin,C. F. Huang,Yu-Ru Li,Yen Shung Tseng,Chun-Kai Yang,Po-Tsun Lin,Jau-Yang Wu,Sheng-Di Lin,C.-T. Liang 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.1
We report a magneto-transport study on the two-dimensional electron system (2DES) in an Al- GaAs/GaAs heterostructure. The direct insulator to quantum Hall conductor transition is observed at low temperatures by increasing the magnetic field B perpendicular to the 2DES. We can also observe the transition by varying the current I and find a relation Te~Ia between electron effective temperature Te and current. Here, a denotes the exponent for the power law. The exponent a, however, can have different values on the two sides of the transition point, which indicates different inelastic scattering mechanisms in the low-field insulator and in the quantum Hall conductor. We report a magneto-transport study on the two-dimensional electron system (2DES) in an Al- GaAs/GaAs heterostructure. The direct insulator to quantum Hall conductor transition is observed at low temperatures by increasing the magnetic field B perpendicular to the 2DES. We can also observe the transition by varying the current I and find a relation Te~Ia between electron effective temperature Te and current. Here, a denotes the exponent for the power law. The exponent a, however, can have different values on the two sides of the transition point, which indicates different inelastic scattering mechanisms in the low-field insulator and in the quantum Hall conductor.
Enhanced Phase Relaxation in a Hybrid Ferromagnet/Semiconductor System
Kuang Yao Chen,Chun-Kai Yang,N. Aoki,Y. Ochiai,Y. Ujiie,K. A. Cheng,Li-Hung Lin,C. F. Huang,Yu-Ru Li,Yen Shung Tseng,Po-Tsun Lin,Jau-Yang Wu,Sheng-Di Lin,C.-T. Liang 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.1
Hybrid ferromagnet/semiconductor systems have been the focus of considerable attention because of the transport properties of two-dimensional electron systems and their potential applications to magnetic storage and sensing devices. We use the weak localization effect to probe the dephasing mechanism at low temperatures. In our study, the zero-temperature phase-relaxation rate can be enhanced in a hybrid ferromagnet/semiconductor system, which may be due to the inhomogeneous magnetic field emanating from the Ni film. The result may improve understanding of the issue of zero-temperature dephasing in disordered systems. Hybrid ferromagnet/semiconductor systems have been the focus of considerable attention because of the transport properties of two-dimensional electron systems and their potential applications to magnetic storage and sensing devices. We use the weak localization effect to probe the dephasing mechanism at low temperatures. In our study, the zero-temperature phase-relaxation rate can be enhanced in a hybrid ferromagnet/semiconductor system, which may be due to the inhomogeneous magnetic field emanating from the Ni film. The result may improve understanding of the issue of zero-temperature dephasing in disordered systems.
A novel quantum interference probe of the energy spectrum of coupled nanodevices
T.P. Martin,R.P. Taylor,H. Linke,B. Murray,N. Aoki,D. Oonishi,Y. Iwase,Y. OchiaI 한국물리학회 2006 Current Applied Physics Vol.6 No.3
Quantum transport of an array of quantum billiards is investigated as a function of the coupling strength of the quantum point con-invasive probe of two characteristic energy scales of the energy level spectrumthe average energy level spacing and average energy levelbroadening. This analysis reveals a marked transition in the coherent area of the array as the coupling between the billiards is increasedand the array evolves into a combined quantum system.
Korean variant dogs have red blood cells with high amino acid accumulation
Fujise, Hiroshi,Lim, Yoon-kyu,Lee, Kyoung-kap,Kim, Seong-hee,Hahn, Woong,Kim, Gon-hyung,Kim, Ji-hyun,Ko, Young-su,Kim, Sung-sun,Youn, Hwa-young,Youn, Sin-keun,Lee, Yong-soon,Ochiai, Hideharu,Tanaka, Y The Korean Society of Veterinary Science 1999 大韓獸醫學會誌 Vol.39 No.4
Amino acids, Na, K and glutathione (GSH) in red blood cells (RBCs) and hematological indices were examined in Korean dogs. A total of seven dogs possessing RBCs with high K and high glutathione (GSH)(HK/HG) were found in 42 Korean dogs : three from Cheju dog, two from Jindo dog and two from Korean mongrel. The RBCs in Korean HK/HG dog contained abnormally high aspartate (Asp), Glu and glutamine (Gln) the same as in HK/HG RBCs from Japanese Shiba dog. Two dogs possessing RBCs with HK and low GSH (HK/LG) were found in Cheju dog, and they accumulated Asp and Gln. Thus, not only the existence of HK dog was confirmed in Korean dogs, but HK/LG dog was also found. The Asp concentration in RBCs from seven of 33 LK dogs was more than $1000{\mu}mol/lc$, the same as in variant LK RBCs with defective Glu/Asp transport (LK/GAT), while it was less than $800{\mu}mol/lc$ in normal LK RBCs. Thus, there were variant dogs having RBCs with abnormally high amino acids accumulation among HK and LK Korean dogs.