SEISAN KENKYU
Online ISSN : 1881-2058
Print ISSN : 0037-105X
ISSN-L : 0037-105X
Volume 60 , Issue 3
Showing 1-28 articles out of 28 articles from the selected issue
Introduction to Special Section
Research Flash
Research Review
  • Mai Van KHIEM, Ryozo OOKA, Hong HUANG, Hiroshi HAYAMI
    2008 Volume 60 Issue 3 Pages 251-260
    Published: 2008
    Released: June 11, 2008
    JOURNAL FREE ACCESS
       In recent years, the urban atmospheric pollution is still an important environmental problem due to the rapid urbanization and industrial development. It is found that atmospheric pollutant concentration can be strongly affected by some local climatic factors (e.g., temperature, humidity, wind, radiation, etc.). In this study, we use the MM5/CMAQ model to examine relationship between these climatic factors and ground ozone (O3) concentration over Kanto (Japan) area. The nested grid system which cover a region of Kanto with grid resolutions of 9 km, 3 km, and 1 km respectively, have been employed to this study. The relationship between the simulated O3 concentration with temperature, solar radiation, relative humidity, and wind were analyzed over the August 2005, representing typical summer climate. The numerical simulation shows O3 concentration as function of temperature, solar radiation, relative humidity and wind direction. The positive correlation was found between O3 concentration with temperature and solar radiation, while the negative correlation was found between O3 concentration and relative humidity. The result of this study suggests that O3 concentration has a close relationship with climatic factors over Kanto area.
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Research Flash
Research Paper
Research Flash
  • Aleksandr CHEKHOVSKIY, Yasutaka OHIRA, Yukiko OTSUKA, Kazuhiko HIRAKAW ...
    2008 Volume 60 Issue 3 Pages 291-294
    Published: 2008
    Released: June 11, 2008
    JOURNAL FREE ACCESS
       A new optical apparatus for displaying three-dimensional motion images has been developed by using a series of water plasma created by the laser breakdown mechanism. A pulse YAG laser output is spatially scanned by using optical scanners and projected into a water tank. Maximum 3D bitmap image size of 1 centimeter and the image resolution of 10 pixels per millimeter were obtained at the pulse frequency of 500 Hertz. The three-dimensional motion image could be colored by seeing through the electronically controlled liquid-crystal color panel. [This abstract is not included in the PDF]
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