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Horikoshi, Satoshi,Tsuchida, Akihiro,Sakai, Hideki,Abe, Masahiko,Sato, Susumu,Serpone, Nick Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.11
A metallic condensing cone that concentrates microwave radiation (equivalent to an optical lens) has been developed and used as part of a system to activate a microwave discharge electrodeless lamp (MDEL) in the oxidative treatment of wastewaters by aiding the novel self-ignition of the lamp on irradiation at low microwave power levels. This approach to self-ignition can potentially lead to considerable energy savings in such treatments. System performance was examined for the ignition power of microwaves of such MDEL devices in water, whose usefulness was assessed by investigating the photolytic transformation of aqueous solutions of representatives of three classes of contaminants: chlorinated phenols, herbicides and endocrine disruptors, specifically 4-chlorophenol (4-CP), 2,4-dichlorophenoxyacetic acid (2,4-D) and 4,4'-isopropylidenediphenol (bisphenol-A; BPA), respectively, taken as model wastewaters in air-equilibrated, in oxygen-saturated and in $TiO_2$-containing aqueous media. The results are discussed in terms of the dynamics of the photo-induced degradation processes.
Satellite Communication System for Multi-Point Data Gathering over Ultra-Wide Area
Tanaka, Hiroshi,Inoue, Satoshi,Tsuchida, Toshihiro,Kazama, Hiroshi 통신위성우주산업연구회 2004 Joint Conference on Satellite Communications Vol.2004 No.-
In this paper, we propose a stellite communications system for gathering data from a lot of observation points scattered over an ultra-wide area. The system configuration takes into account the requirements for a practical data gathering system. The main target of our system is reduced communication cost by using a narrow frequency band and the main feature os an economical data gathering using a group-modem composed of a multi-carrier multi-rate filter bank. We describe our system investigation for channel assignment methods, data gathering sequences, and channel interference suppression between narrow band carries.