KINDAI UNIVERSITY


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OGAWA Yoshihiro

Profile

FacultyDepartment of Applied Sociology, Environmental Studies and Design Major / Graduate School of Liberal Arts / Atomic Energy Research Institute
PositionAssociate Professor
Degree
Commentator Guidehttps://www.kindai.ac.jp/meikan/260-ogawa-yoshihiro.html
URL
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Last Updated :2020/09/01

Education and Career

Education

  •  - 1980 , Osaka University
  •  - 1980 , Osaka University, Graduate School, Division of Engineering
  •  - 1977 , Kindai University, Faculty of Science and Engineering
  •  - 1977 , Kinki University, Faculty of Science and Engineering

Academic & Professional Experience

  •   1995 ,  - 2008 , Kindai University
  •   1980 ,  - 1995 , Kindai University
  •   1995 ,  - 2008 , Kinki University, Assistant Professor
  •   2008 , - Kinki University, Associate Professor
  •   1980 ,  - 1995 , Kinki University, Research Assistant

Research Activities

Research Areas

  • Energy, Nuclear engineering
  • Environmental science/Agricultural science, Environmental policy and society
  • Environmental science/Agricultural science, Environmental impact assessment
  • Humanities & social sciences, Geography
  • Informatics, Information theory

Research Interests

  • Nuclear Reactor Physics, Environmental Radiation and Radioactivity, Computer Science, Spatial Information Science

Conference Activities & Talks

  • Construction of spatial information system around nuclear facilities,   2008 06
  • Construction of spatial information system around nuclear facilities - environmental radiation monitoring system -,   2007 06
  • Spatial Information System around Nuclear Facilities,   2007 06
  • Web Application for Dose Evaluation using Neutron Spectrometer with Moderator,   2006 06

Misc

  • Web Application to Dose Evaluation Using Neutron Spectrometer with Moderators, RADIOISOTOPES, 56, 10, 613, 620,   2007 10 , 10.3769/radioisotopes.56.613
  • Neutron Characteristics in Reactor Radiation Field for Calibration of Personal Dosimeters, RADIOISOTOPES, 55, 9, 515, 524,   2006 09 , 10.3769/radioisotopes.55.515
  • Measurements of Depth Doses by Thermal Neutron and of Neutron Energy Spectra Using Passive Neutron Dosimeter with Spherical Polyethylene Moderator, RADIOISOTOPES, 55, 1, 1, 12,   2006 01 , 10.3769/radioisotopes.55.1
  • Development of Simple Passive Neutron Dosimeter with Cylindrical Acrylic Resin Moderator Using Thermoluminescent Detector, RADIOISOTOPES, 54, 8, 287, 295,   2005 08 , 10.3769/radioisotopes.54.287
  • The decoding in the history of the environmental pollution using the Lake Biwa sediment,   2002 03
  • Noise characteristics of neutron images obtained by cooled CCD device, Ryoichi Taniguchi, Ryoya Sasaki, Shuichi Okuda, Ken-Ichi Okamoto, Yoshihiro Ogawa, Tadashi Tsujimoto, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 605, 1-2, 85, 90,   2009 06 , 10.1016/j.nima.2009.01.221
    Summary:The noise characteristics of a cooled CCD device induced by neutron and gamma ray irradiation have been investigated. In the cooled CCD images, characteristic white spot noises (CCD noise) frequently appeared, which have a shape like a pixel in most cases and their brightness is extremely high compared with that of the image pattern. They could be divided into the two groups, fixed pattern noise (FPN) and random noise. The former always appeared in the same position in the image and the latter appeared at any position. In the background image, nearly all of the CCD noises were found to be the FPN, while many of them were the random noise during the irradiation. The random CCD noises increased with irradiation and decreased soon after the irradiation. In the case of large irradiation, a part of the CCD noise remained as the FPN. These facts suggest that the CCD noise is a phenomenon strongly relating to radiation damage of the CCD device. (C) 2009 Elsevier B.V. All rights reserved.
  • Concentrations and their ratio of Rn-222 decay products in rainwater measured by gamma-ray spectrometry using a low-background Ge detector, M Takeyasu, T Iida, T Tsujimoto, K Yamasaki, Y Ogawa, JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 88, 1, 74, 89,   2006 , 10.1016/j.jenvrad.2006.01.001
    Summary:The concentrations and the concentration ratios of individual short-lived Rn-222 decay products (Pb-214 and Bi-214) in rainwater were measured at Kumatori village (34.39 degrees N, 135.35 degrees E, approximately 70 m above sea level) in Osaka, Japan, by gamma-ray spectrometry using a low-background Ge detector. The dependence of the time variations of the concentrations and their ratios on rainfall rate was investigated. It was observed that the concentrations were negatively correlated with the rainfall rate in some rainfall events, and that there was no clear correlation in other rainfall events. The changes in the dependence of the concentration on the rainfall rate occurred after the passage of a cold front during a single rainfall event. The concentration ratios showed a weak negative correlation with the rainfall rate for most of the observed rainfall events. A scavenging model was designed in this study in order to explain the observation results. Based on the relationship between the concentrations of Pb-214 and Bi-214 in the rainwater and the rainfall rate for an individual rainfall event, the increase in the environmental gamma-ray dose rate from Pb-214 and Bi-214 deposited on the ground was calculated, and the calculated increase agreed well with that observed by the in situ measurement on flat ground. (c) 2006 Elsevier Ltd. All rights reserved.
  • Statistical image analysis of high-sensitivity neutron images obtained by cooled CCD systems, R Taniguchi, S Fujine, Y Tsujii, K Okamoto, K Yoneda, S Okuda, Y Ogawa, T Niwa, T Tsujimoto, APPLIED RADIATION AND ISOTOPES, 61, 4, 465, 470,   2004 10 , 10.1016/j.apradiso.2004.03.071
    Summary:Neutron sensitivity and noise characteristics of cooled CCD NR systems were investigated. Eighteen species of neutron sensitive scintillators were tested by the use of two types of cooled CCD devices. The statistical analysis of the S/N ratio of the neutron images showed that the ZnS + LiF type was the highest sensitivity scintillator. The generation rate of the CCD noises increased with increasing exposure time, temperature of the device and dose rate of the environmental radiation. The generation rate and the pulse height distribution of the noise were quite different between the two CCD devices. Thus, the origin of the noise is considered to be strongly related to the internal structure of the CCD devices. (C) 2004 Elsevier Ltd. All rights reserved.
  • Estimation of Low Level Neutron Doses Based on Neutron Spectra in the Vicinity of a Nuclear Reactor, American Society for Testing Materials, 276,   2001
  • Decoding of historical trend of human activities recorded in sediments, Daishiki, 30, 65, 72,   1998
  • Variation of Dose Rates by Cosmic-Ray Charged Particles around Nuclear Facilities in Wakasa Area, Proceedings of International Conference on Radiation Dosimetry and Safety, 1, 252,   1997
  • Measurement of Flux Densities of Cosmic-Ray Charged Particles Using a Spherical Plastic Scintillation Detector, 32, 3, 277, 283,   1997 , 10.5453/jhps.32.277
  • Radon-222 Concentration in Outdoor Air at Wakasa District, 30, 303,   1995
  • Development of the High Sensitivity Real-Time Neutron Radiography for Low-Flux Neutron Source, 43, 8, 531,   1994
  • Radon-222 progeny in precipitation, Proceedings of Asia congress on radiation protection, 618-621,   1993
  • Measurement of outdoor radioactivities of radon and thoron by the passive radon-thoron monitor of cup type with cellulose nitrate film, Proceedings of Asia congress on radiation protection, 596-599,   1993
  • Radon Daughters in Rain Water,   1992
  • Classification of Monitoring sites around TSURUGA nuclear power station based on various variational patterns of average monthly exposure rates, Proceedings of IRPA 8,   1992
  • Analysis of time series exposure rates obtained at a monitoring station around nuclear power stations, Proceedings of the third International Symposium on Advanced Nuclear Energy Research,   1991
  • Studies on the Concentration of Radioactive Substances by Plankton, Chlorella pyrenoidosa, 25,   1990 , 10.5453/jhps.25.361
  • A simple Passive neutron spectrum indicator using CaSO4 Tm Thermoluminesoent deteotors, Radiation Protection Dosimetry, 34,   1990
  • A new method for generating group constants for analysis of blanket parameters of HCLWR with monte carlo method, progress in Nuclear Energy, 24,   1990 , 10.1016/0149-1970(90)90039-8
  • Studies on the Physico-chemical behavior of 60Co, 106Ru, and 144Ce in fresh water, 24,   1989 , 10.5453/jhps.24.237
  • Application of a CR-System to neutron Radiography, Proceedings of the third world conterence Neutron Rodiography,   1989
  • Studies on the Physico-Chemical behavior of 60Co, 106Ru and 144Ce in sea water, 23,   1988 , 10.5453/jhps.23.105
  • Studies on the interaction of radiocobalt with dissolved organic matter in seawater, 22,   1987 , 10.5453/jhps.22.429
  • Calculation of Gamma-Ray Dose Rate at the Ground Surface Due to Radon Progeny in the Atmosphere around the Complicated Topography, 34, 67, 10.5453/jhps.34.67

Research Grants & Projects

  • Spatial Information Analysis with GIS
  • Measurement and evaluation of envivonmental neutron
  • Computer simulation and visualization