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전도성 필름 전극을 이용한 수중 내압용기의 누수탐지 방법에 관한 연구
오상우(Sang-Woo Oh),최혁진(Heyuk-Jin Choi),이승훈(Seung-Hoon Lee),이승국(Seung-Gook Lee),김진민(Jin-Min Kim) 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6
Underwater pressure vessel is generally designed and manufactured to resist the water pressure of operating depth. But on account of various unexpected errors in the process of design, manufacture and integration, the pressure vessel can be deformed and water can leak into it at the operating depth. Because there is various equipment taking the roles of control, communication, instrumentation and power source inside the pressure vessel, leakage can occur a fatal influence to the total system. So the leakage detection and notice are very important functions on the underwater pressure vessel. This paper deals with the development of water leakage detector which consists of the conductive adhesive film as a sensing electrode and the ohmmeter as a sensing instrument. To figure out and standardize the shape of water leakage, the underwater pressure vessel having the loose bolts is simulated in the tests at the case of vertical and horizontal position. To find out the effective material of electrode, through the experiment, various kinds of material (aluminum, copper and conductive fabric) as an electrodes are compared to improve sensitivity. Also, to find out the relation between electrode's gap and sensitivity, the experiment was performed and the optimal size of electrode is derived. Though these experiments, small leakage droplet up to 0.1 ㎖ can be detected by optimal design of sensor and these results will be reflected in the development of complete leakage sensing system as a future work.
한국 웩슬러 아동지능검사-4판(K-WISC-Ⅳ)에서의 성차
오상우(Sang-Woo Oh),오미영(Mi-Young Oh),김선희(Seon-Hee Kim) 한국재활심리학회 2011 재활심리연구 Vol.18 No.3
This study investigates cognitive sex differences in child and adolescent intelligence as measured by the Korean WISC-Ⅳ. It was hypothesized that there would be no differences attributable to sex in Full Scale IQ (FSIQ), but on various composite score levels. Sex effects were expected to be more pronounced during/after puberty than before. Some of the standardization sample of the Korean WISC-Ⅳ (N=508) was used to assess and evaluate sex differences in test performance across defined age groups (6-9, 10-12, and 13-16 years). At all ages, there were no gender effects in the Full-Scale IQ, Verbal Comprehension Index and Working Memory Index. Age-specific effect with 10-12-year-old children was found in the Perceptual Reasoning Index. In the Processing Speed Index, girls scored higher than boys and this finding was the most prominent in our data. No significant sex-by-age interaction effect was found in Full-Scale IQ, Verbal Comprehension Index, Perceptual Reasoning Index, Working Memory Index and Processing Speed Index using two-way ANOVA. The limitations of this study and suggested directions for future research were discussed.
오상우(Sang Woo Oh),조유숙(You Sook Cho),임미경(Mi Kyoung Lim),유빈(Bin Yoo),문희범(Hee Bom Moon) 대한천식알레르기학회 1999 천식 및 알레르기 Vol.19 No.5
Background and objective : The outcome of asthma treatment has traditionally been assessed by measuring the conventional clinical parameters such as symptoms, expiratory flow rates and needs for medications. But none of them tells us whether the patients are actually able to func- tion properly in their lives. Only assessment of the quality of life (QOL) can reflect the parts of patients lives affected by the disease. However, there is no measure to assess the quality of life of patients with any chronic diseases in Korea yet. We developed the QOL Questionnaire for Ko- rean Asthmatics and evaluated its measurement properties. Method: The questionnaire was composed of 18 items in four domains : i.e. activity limitation (6 items), symptoms (5 items), emotional function (3 items) and environmental stimuli (4 items). At our out-patient clinic, 32 adults with moderate to severe persistent bronchial asthma were enrolled. The study design consisted of 4 week unblinded single cohort with visits at 0 and 4 weeks, and the patients were asked to answer the questionnaire by self administration method at the two separate visits. Forced expiratory volume for 1 second (FEV1) and peak expiratory flow rate (PEFR) were recorded at each visit. According to the patients and physicians global assessment, the patients were divided into two groups, i.e. stable and changed (improved). The responsiveness, reproducibility and validity of the questionnaire were evaluated. Results : The total QOL scores at the second visit in the changed group were significantly higher than those at the first visit. The score differences between the two visits in the changed group were higher than in the stable group. In the stable group, the responses to the question- naire were reproducible. The QOL scores showed good longitudinal correlation with the expirato- ry flow rates, whereas FEV1 did not correlate with the QOL in cross-sectional analysis. Conclusion : The questionnaire proved to be reproducible, responsive and valid in the subjects. It could be recommended for the outcome evaluation of Korean asthmatics.