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Magnetic Property of a Single Crystal of Spin-1/2 Triple-chain Magnet Cu3(OH)4SO4
Yutaka Fujii,Yuya Ishikawa,Hikomitsu Kikuchi,Yasuo Narumi,Hiroyuki Nojiri,Shigeo Hara,Hirohiko Sato 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The spin-1/2 triple-chain magnet Cu3(OH)4SO4 (mineral name: antlerite) is a candidate ‘idlespin’system. In order to study the phase transitions in this compound in detail, we have performedspecific-heat measurements under magnetic fields up to 10 T and in the temperature range downto 1.9 K and proton nuclear magnetic resonance (1H-NMR) experiments with single crystals. Wefound at least three successive phase transitions at zero field around 5 K which strongly dependon the value and the direction of the applied field. Another transition around 3 K was also found. 1H-NMR spectra in a low-temperature and low-field ordered phase indicated an antiferromagneticcommensurate spin structure with at least four sublattices, which is discussed in connection withthe idle-spin state. Phase diagrams show a richness of magnetic phases for this compound.
매립지에서 벤토나이트와 blast-furnace 슬래그 혼합물에 의한 점토성 불투수층에 관한 구조물의 입증실험
( Isamu Norimatsu ),( Fuminori Hirosue ),( Shigeo Kobayashi ),( Ikuo Fujii ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.2
수명이 얼마 남지 않은 구 매립지의 대안으로, 새로운 매립지를 설치하는 것은 종종 지역 주민들과 문제를 야기할 수 있다. 환경 생태나 업무 활동에서 장애물이 항상 쉽게 극복되는 것은 아니다. 매립지의 안전성에 대한 사람들의 불신에서 기인하기 때문에, 영구적인 안전성이 보장되기 위한 더 나은 매립지에서의 발달된 기술이 시급하다. 차수층을 활용하는 매립지를 건설한 때, 차수층 아래에, 노출된 토양은 분쇄된 blast-furnace 슬래그와 벤토나이트를 혼합한 것으로 환경에 오염물질이 노출되지 않도록 차수층으로써 역할을 하도록 경화시키기 위해 놓아둔다. 이처럼 매립지에는 고도로 안전한 새로운 기술이 개발되고 입증되고 있다. Establishing new disposal sites, as an alternative for the old ones with the life-long remained short, is often troublesome with local residents. Obstacles in eco-living and business activities are not always easily overcome. Due to recent unreliable feeling of people on the safety of disposal sites, it is urgently required to develop technology for better disposal sites in order to ensure their permanent safety. During construction of a disposal site with utilizing water-proof sheets, below the sheet, the exposed soil is mixed with pulverized blast-furnace slag and bentonite, then left for hardening to serve as a water-proof soil layer, which can stop propagating contamination to the outside environment. Such a new technology for highly safety disposal sites has been developed and proven.
( Isamu Norimatsu ),( Fuminori Hirosue ),( Shigeo Kobayashi ),( Ikuo Fujii ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.1
Establishing new disposal sites, as an alternative for the old ones with the life-long remained short, is often troublesome with local residents. Obstacles in eco-living and business activities are not always easily overcome. Due to recent unreliable feeling of people on the safety of disposal sites, it is urgently required to develop technology for better disposal sites in order to ensure their permanent safety. During construction of a disposal site with utilizing water-proof sheets, below the sheet, the exposed soil is mixed with pulverized blast-furnace slag and bentonite, then left for hardening to serve as a water-proof soil layer, which can stop propagating contamination to the outside environment. Such a new technology for highly safety disposal sites has been developed and proven.
Kaoru Ichikawa,Wen-Chang Yang,Akihiko Morimoto,Yutaka Yoshikawa,Shigeo Sugitani,Wen-Shan Chiang,Jian-Wu Lai,En Yu Liang,Cho-Teng Liu,Chang-Wei Lee,Kei Yufu,Moeto Kyushima,Satoshi Fujii,Tomoharu Senju 한국해양과학기술원 2013 Ocean science journal Vol.48 No.1
Japanese and Taiwanese institutes have collaborated to obtain ocean radar data with significantly increased coverage in the upstream Kuroshio region. An international joint survey was conducted in June 2012, in which intensive in situ observations were performed within the radar coverage. Details of the joint survey are presented in this paper with brief descriptions of preliminary results on the surface and subsurface currents near and within the Kuroshio.