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An attempt to organize bioassays' data of various chemicals
Sakoda, Akiyoshi,Shoji, Ryo,Sakai, Yasuyuki,Suzuki, Motoyuki,Utsumi, Hideo 嶺南大學校 環境問題硏究所 1998 環境硏究 Vol.18 No.1
Abstract Environmental waters such as river and lake waters are most likely polluted by a numerous number of chemicals produced and emitted by human activities nowadays. Bioassays are considered to be rational methodologies for evaluating their toxicities against human beings and ecosystems. The various kinds of bioassays data for chemicals have been accumulated so far in the literature. Organizing bioassays data of various chemicals was tried in this work in order to make use of those data much more effectively and practically for the toxicity control and management of environmental waters. Environmental waters such as river and lake waters are most likely polluted by a numerous number of chemicals produced and emitted by human activities nowadays. Bioassays are considered to be rational methodologies for evaluating their toxicities against human beings and ecosystems. The various kinds of bioassays data for chemicals have been accumulated so far in the literature. Organizing bioassays data of various chemicals was tried in this work in order to make use of those data much more effectively and practically for the toxicity control and management of environmental waters.
Akira Iijima,Hideo Shoji 대한기계학회 2006 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.20 No.9
Controlled Auto-ignition (CAI) combustion processes can be broadly divided between a CAI process that is applied to four-cycle engines and a CAI process that is applied to two-cycle engines. The former process is generally referred to as Homogeneous Charge Compression Ignition (HCCl) combustion and the later process as Active Thermo-Atmosphere Combustion (AT AC). The region of stable engine operation differs greatly between these two processes, and it is thought that the elucidation of their differences and similarities could provide useful information for expanding the operation region of HCCl combustion. In this research, the same two-cycle engine was operated under both the ATAC and HCCI combustion processes to compare their respective combustion characteristics. The results indicated that the ignition timing was less likely to change in the AT AC process in relation to changes in the fuel octane number than it was in the HCCI combustion process.
Iijima, Akira,Shoji, Hideo The Korean Society of Mechanical Engineers 2006 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.20 No.9
Controlled Auto-ignition (CAI) combustion processes can be broadly divided between a CAI process that is applied to four-cycle engines and a CAI process that is applied to two-cycle engines. The former process is generally referred to as Homogeneous Charge Compression Ignition (HCCI) combustion and the later process as Active Thermo-Atmosphere Combustion (ATAC) The region of stable engine operation differs greatly between these two processes, and it is thought that the elucidation of their differences and similarities could provide useful information for expanding the operation region of HCCI combustion. In this research, the same two-cycle engine was operated under both the ATAC and HCCI combustion processes to compare their respective combustion characteristics. The results indicated that the ignition timing was less likely to change in the ATAC process in relation to changes in the fuel octane number than it was in the HCCI combustion process.
Masahiko YAMAZOE,Kazuhisa HAEIWA,Shoji HIROSE,Masayoshi FUKUMOTO,Hideo SATO 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
We developed an evolutional wideband (3 to 26㎒) short-wave transmitter with an output of 1㎾ using PSM (Pulse Step Modulation) that digital (DRM: Digital Radio Mondiale) and analog AM modulation are possible. This equipment employs digital processed PSM method that high sound quality can be easily achieved in the modulation section and Class-E amplification for obtaining higher efficiency in the PA section composed of eight 125W PA. In addition, new output circuit for phase compensation of the load impedance. As a result, in the 125W PA, a drain efficiency of 95% at 3.925㎒ and 86% at 25.885㎒ was obtained. As analog AM characteristics, S/N of 54㏈ and above, distortion factor of 4% and under were obtained ranging from 3M to 26㎒. In digital modulation (DRM), S/N of about 24.5㏈ (at 25.885㎒ at 16QAM) that satisfies target performance sufficiently was obtained.