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Intramolecular [2+2] Photocycloaddition and Cycloreversion of Ferulic Acid Derivatives
Maeda, Hajime,Nishimura, Keisuke,Yokoyama, Akihiro,Sugimoto, Akira,Mizuno, Kazuhiko,Hosoda, Asao,Nomura, Eisaku,Taniguchi, Hisaji Korean Society of Photoscience 2015 Rapid communication in photoscience Vol.4 No.1
Intramolecular photocycloaddition of ferulic acid derivatives proceeded in high yields to give head-to-head intramolecular photodimers as three atropisomers. The photocycloaddition was sensitized by triplet sensitizers such as benzophenone, whereas photocycloreversion was promoted by 9,10-dicyanoanthracene (DCA) as an electron-transfer photocatalyst. On the other hand, intermolecular photocycloaddition afforded a head-to-tail photodimer.
A Music Watermark in Consideration of Global Gain and Scalefactor in MP3 Compression
Akio Ogihara,Nobuhiko Maeda,Motoi Iwata,Akira Shiozaki 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
The objective of this work is to demonstrate a new watermarking method for audio data in consideration of MP3 (MPEG audio layer-3) compression which is usually used in personal computer, portable IC audio player, etc.