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Performance-based Wind-resistant Design for High-rise Structures in Japan
Nakai, Masayoshi,Hirakawa, Kiyoaki,Yamanaka, Masayuki,Okuda, Hirofumi,Konishi, Atsuo Council on Tall Building and Urban Habitat Korea 2013 International journal of high-rise buildings Vol.2 No.3
This paper introduces the current status of high-rise building design in Japan, with reference to some recent projects. Firstly, the design approval system and procedures for high-rise buildings and structures in Japan are introduced. Then, performance-based wind-resistant design of a 300 m-high building, Abeno Harukas, is introduced, where building configuration, superstructure systems and various damping devices are sophisticatedly integrated to ensure a higher level of safety and comfort against wind actions. Next, design of a 213 m-high building is introduced with special attention to habitability against the wind-induced horizontal motion. Finally, performance-based wind-resistant design of a 634 m-high tower, Tokyo Sky Tree, is introduced. For this structure, the core column system was adopted to satisfy the strict design requirements due to the severest level of seismic excitations and wind actions.
Highly transparent Zn1-xMgxO/ITO multilayer for window of thin film solar cells
강동원,Amartya Chowdhury,Porponth Sichanugrist,Yusuke Abe,Hirofumi Konishi,Yuki Tsuda,Tomohiro Shinagawa,Hidetada Tokioka,Hiroyuki Fuchigami,Makoto Konagai 한국물리학회 2015 Current Applied Physics Vol.15 No.9
Texture-etched Zn1-xMgxO films were fabricated and applied as front transparent electrodes for superstrate type thin film solar cells. The Zn0.65Mg0.35O film (x = 0.35) showed optical transparency better than commercially available Asahi VU and double-textured ZnO (WT-ZnO) substrates. To provide pertinent conductivity, ITO film was coated on the texture-etched Zn0.65Mg0.35O. By employing the Zn0.65Mg0.35O/ITO substrate instead of the SnO2, we demonstrated an enhancement of quantum efficiency for amorphous silicon thin film solar cell devices, resulted in efficiency improvement from 8.92 to 9.56%. We also examined effectiveness of the Zn0.65Mg0.35O/ITO substrate for the microcrystalline silicon solar cells which delivered an efficiency of 9.73% with proper anti-reflection coating. Our experimental results suggest that the Zn0.65Mg0.35O/ITO multilayer front contact can be beneficial for reinforcing performances of silicon-based thin film solar cell devices.