1 Study on Effectiveness of Flyash as Deteriorarion Prevention Method Against Acid Rain Kazuto FUKUDOME, Tatsuo KITA, Yuuji MURAKAMI 2 Study on Anchor Performance of Friction Welded Plate Using Mechanical Anchorage with High Strength Reinforcing Bar Takeju MATSUKA, Yuji MURAKAMI, Motoyuki SUZUKI, Naonobu TAKAHASHI 3 Possibility of Fixation of Carbon Dioxide by a Man-Made Sea Mount Tatsuo SUZUKI, Yoichi HONDA 4 The Effect of Light Supplement for Lettuce Cultivation using Fertilizing Supply System by Mat -Trial for Increasing Production- Yutaka IKEDA, Hirofumi TANIGUCHI