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Observation of Domain Wall Structures in Triglycine Sulfate by Using Scanning Probe Microscopy
Makoto Iwata,Fumihiko Itoh,Takuma Morishita,Rintaro Aoyagi,Masaki Maeda,Yoshihiro Ishibashi 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.2
The 180˚ domain wall structure on the (010) cleavage plane in triglycine sulfate (TGS) was investigated using scanning probe microscopy (SPM). We found that a step pattern with an interval of one half the lattice constant b appeared on the cleavage plane. Using friction force microscopy (FFM), the contrast of the friction image was found to be composed of two friction values in the step pattern, implying that the friction image shows an 180± domain wall structure. We also con¯rmed that the lenticular domain wall structure in TGS could be observed in the quenched sample by using FFM. The 180˚ domain wall structure on the (010) cleavage plane in triglycine sulfate (TGS) was investigated using scanning probe microscopy (SPM). We found that a step pattern with an interval of one half the lattice constant b appeared on the cleavage plane. Using friction force microscopy (FFM), the contrast of the friction image was found to be composed of two friction values in the step pattern, implying that the friction image shows an 180± domain wall structure. We also con¯rmed that the lenticular domain wall structure in TGS could be observed in the quenched sample by using FFM.
OPTICAL-INFRARED AND HIGH-ENERGY ASTRONOMY COLLABORATION AT HIROSHIMA ASTROPHYSICAL SCIENCE CENTER
UEMURA, MAKOTO,YOSHIDA, MICHITOSHI,KAWABATA, KOJI S.,MIZUNO, TSUNEFUMI,TANAKA, YASUYUKI T.,AKITAYA, HIROSHI,UTSUMI, YOUSUKE,MORITANI, YUKI,ITOH, RYOSUKE,FUKAZAWA, YASUSHI,TAKAHASHI, HIROMITSU,OHNO, MA The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
The Hiroshima Astrophysical Science Center (HASC) was founded in 2004 at Hiroshima University, Japan. The main mission of this institute is the observational study of various transient objects including gamma-ray bursts, supernovae, novae, cataclysmic variables, and active galactic nuclei by means of multi-wavelength observations. HASC consists of three divisions; the optical-infrared astronomy division, high-energy astronomy division, and theoretical astronomy division. HASC is operating the 1.5m optical-infrared telescope Kanata, which is dedicated to follow-up and monitoring observations of transient objects. The high-energy division is the key operation center for the Fermi gamma-ray space telescope. HASC and the high-energy astronomy group in the department of physical science at Hiroshima University are closely collaborating with each other to promote multi-wavelength time-domain astronomy. We report the recent activities of HASC and some science topics pursued by this multi-wavelength collaboration.
Dynamic angling side-view mirror for supporting recognition of a vehicle in the blind spot
Junpei Kuwana,Makoto Itoh 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper proposes a novel driver support system named DAMS (Dynamic Angling Mirror System) for enhancing driver recognition of a vehicle in the blind spot when his or her vehicle is going to change lanes. The DAMS moves the corresponding side-view mirror dynamically when another vehicle entered the blind spot. A cognitive experiment with a driving simulator was conducted to investigate effectiveness of the DAMS. In addition, we have modified the original DAMS. The new one is named EDAMS (Enhanced Dynamic Angling Mirror System), which turns on a lamp when the system changes the yaw angle of the side-view mirror for supporting driver"s situation awareness. The result of an experiment suggests that EDAMS is more effective and acceptable than the conventional DAMS.