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라돈방사능농도의 측정을 통한 지진발생 예측에 관한 연구
김윤신,이철민,이승일,Iida, Takao,Yoshioka, Katsuhiro 한국환경과학회 2003 한국환경과학회지 Vol.12 No.6
The purpose of this study was to predict occurrence of earthquakes in Korea by measuring the concentration of radon radioactivity in the air and in the underground water. Two monitoring systems of radon concentration detection in the air were installed in Seoul, East Coast area, whereas of radon concentration in the underground water in Kyungju area during December, 1999 to June, 2001. The distribution of radon concentration in the air in Seoul is as follows : winter (10.10 ± 2.81 Bq/m³), autumn (8.41 ± 1.35 Bq/m³), summer (5.83 ± 0.05 Bq/m³) and spring (5.34 ± 0.44 Bq/m³), whereas the distribution of radon in the air in the East Coast area showed some difference as follows : autumn (14.08 ± 5.75 Bq/m³), summer (12.04 ± 0.53 Bq/m³), winter (12.02 ± 1.40 Bq/m³) and spring (8.93 ± 0.91 Bq/m³). In the meanwhile, the distribution of radon in the water is as follows : spring (123.59 ± 16.36count/10min), winter (93.95 ± 79.69counter/lOmin), autumn (68.96 ± 37.53counter/lOmin) and spring (34.45 ± 9.69counter/l0min). The daily range of the density of radon concentration in Seoul and East Coast area was between 5.51 Bq/m³ - 9.44 Bq/m³, 7.15 Bq/m³ - 15.27 Bq/m³, respectively. Correlation of the distributions of radon concentrations in the air and in underground water with earthquake showed considerable variations of radon concentration before the occurrence of the earthquake. The results suggested that radon radioactivity seemed to be helpful for the prediction of the occurrence of earthquake.
Mitsuru UESAKA,Atsushi FUKASAWA,Fumito SAKAMOTO,Haruyuki OGINO,Junji URAKAWA,Katsuhiro DOBASHI,Kazutaka TAKAO,Mitsuo AKEMOTO,Tomohiko YAMAMOTO,Toshinobu MIYOSHI,Toshiyasu HIGO 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.1
A Compton scattering X-ray source consisting of an X-band (11.424 GHz) electron linear accelerator (linac) and Q-switched Nd:YAG laser is currently under construction. Monochromatic hard X-rays are required for a variety of medical and biological applications. The new hard X-ray source produces monochromatic X-rays via collision between a 35-MeV multi-bunch (104 bunches in a 1 μs RF pulse) electron beam and 1.4 J/10 ns (532 nm) Nd:YAG laser beam. The linac uses an X-band 3.5-cell thermionic cathode RF gun and an alpha magnet as an injector. The thermionic cathode RF gun is the first of its kind and can generate a high current (2 μA) and a multi-bunch 2-MeV electron beam. To increase the efficiency of the X-ray yield, a laser pulse circulation system is adopted, that can increase the X-ray intensity by up to 50 times. This scheme can produce monochromatic tunable X-rays (10 40 keV) with intensities of 108 109 photons/sec. In addition, the X-ray energy can be changed rapidly over 40 ms by two different wavelength lasers (YAG fundamental (1064 nm), 2nd harmonic (532 nm)) and an optical switch. This quick energy change is very important for living specimens and is very difficult to achieve in light sources such as a large SR (Synchrotron Radiation) source. The system can be used for dual-energy X-ray CT and subtraction X-ray CT to determine the 3D distribution of the atomic number density and electron density, and specified atomic distribution, respectively. In this paper, we describe the details of the system, report on experiments on the X-band thermionic cathode RF gun, and discuss applications of monochromatic X-rays.?
TREATMENT OF SOFT TISSUE INFECTIONS WITH HYPERBARIC OXYGEN (HBO) THERAPY
Uchida, Kazuhiro,Kawashima, Mahito,Tamura, Hiroaki,Yamasaki, Yasuhiro,Takao, Katsuhiro 고신대학교 의학부 1986 高神大學校 醫學部 論文集 Vol.2 No.1
Breathing oxygen under high pressure increases the concentration of oxygen in the blood and reduces hypoxia. Hyperbanc oxygen(HBO) is useful in treating many diseases. It is used orthopedics, for example, to treat anaerobic gas gangrene. At our hospital good results were obtained using it adjunctively to the surgical and antibiotic treatment of soft tissue infections (including aerobic infections).
TREATMENT OF SOFT TISSUE INFECTIONS WITH HYPERBARIC OXYGEN(HBO) THERAPY
Kazuhiro Uchida,Mahito Kawashima,Hiroaki Tamura,Yasuhiro Yamasaki,Katsuhiro Takao 고신대학교(의대) 고신대학교 의과대학 학술지 1986 고신대학교 의과대학 학술지 Vol.2 No.1
Brathing oxygen under high pressure increases the concentration of oxygen in the blood and reduces hypoxia. Hyperbaric oxygen(HBO) is useful in treating many diseases. It is used orthopedics, for example, to treat anaerobic gas gangrene. At our hospital good results were obtained using it adjunctively to the surgical and antibiotic treatment of soft tissue infections (including aerobic infections).
SEPARATION OF MICROCYSTIS SP. BY POLYSILICATOIRON COAGULANT
橋本克絃,HASEGAWA, Takao,WANG, Jianzhong,KUROKAWA, Mayumi,WATANABE, Yoshimasa 嶺南大學校 環境問題硏究所 1997 環境硏究 Vol.17 No.1
ABSTRACTRecently attention has been paid to algae which are very difficult to remove and often interfere with conventional drinking water treatment units such as coagulation, sedimentation and filtration. In this paper polysilicatio-iron coagulant, a new inorganic polymer coagulant developed by the authors, was employed. It's coagulation characteristics were investigated by jar test as for algae such as blue-green alga Microcystis sp. and diatom Stephanodiscus sp. contained in impounded waters of estuary dam. The coagulation effect of polysilicatio-iron was also compared with that of conventional aluminum coagulants. Results indicated that polysilicatio-iron coagulant was very effective in coagulation and separation of Microcystis sp. and Stephanodiscus sp. in comparison with the conventional aluminum coagulants.