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Development of New SCADA System for 500kV Substations
Murakami, Juri,Kimoto, Hirofumi,Ono, Manabu,Kasahara, Kuniyoshi,Hayasaka, Yasushi,Ueno, Yasuhide 대한전기학회 2013 The Journal of International Council on Electrical Vol.3 No.1
We developed a new SCADA system for 500-kV substations. To apply existing LAN-based SCADA system for unmanned 275-kV or 77-kV substations, we had to develop three functions. Firstly, the new SCADA system enables that 500-kV substation is supervised and controlled from multiple operating sites. Secondly, the database of the new SCADA system can be downloaded the maintenance data from the SCADA system for 500-kV control center via an IP network. Finally, the new SCADA system has supervisory control capability for manned 500-kV substations. In this paper, we describe these functional over view of the new SCADA system. Currently, 500-kV substations are manned substations. And these substations are supervised and controlled by human operators on sites. Using the new SCADA system, 500-kV substations will be realized remote supervisory control from the 500-kV control center a few years later. Therefore, manned 500-kV substations will convert into unmanned substations.
Satomi Seki,Naoko Kato,Naomi Ito,Koichiro Kinugawa,Minoru Ono,Noboru Motomura,Atsushi Yao,Masafumi Watanabe,Yasushi Imai,Norihiko Takeda,Masashi Inoue,Masaru Hatano,Keiko Kazuma 한국간호과학회 2010 Asian Nursing Research Vol.4 No.2
Purpose The aim of this study was to evaluate the validity and reliability of the Seattle Angina Questionnaire, Japanese version (SAQ-J) as a disease-specific health outcome scale in patients with coronary artery disease. Methods Patients with coronary artery disease were recruited from a university hospital in Tokyo. The patients completed self-administered questionnaires, and medical information was obtained from the subjects’medical records. Face validity, concurrent validity evaluated using Short Form 36 (SF-36), known group differences, internal consistency, and test-retest reliability were statistically analyzed. Results A total of 354 patients gave informed consent, and 331 of them responded (93.5%). The concurrent validity was mostly supported by the pattern of association between SAQ-J and SF-36. The patients without chest symptoms showed significantly higher SAQ-J scores than did the patients with chest symptoms in 4 domains. Cronbach’s alpha ranged from .51 to .96, meaning that internal consistency was confirmed to a certain extent. The intraclass correlation coefficient of most domains was higher than the recommended value of 0.70. The weighted kappa ranged from .24 to .57, and it was greater than .4 for 14 of the 19 items. Conclusions The SAQ-J could be a valid and reliable disease-specific scale in some part for measuring health outcomes in patients with coronary artery disease, and requires cautious use. [Asian Nursing Research 2010;4(2):57–63]