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조수행,윤기석,임종호,박성원 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.10
In the development of the advanced spent fuel management process based on the molten salt technology, it is essential to choose the optimum material for the process equipment handling molten salt. The corrosion behaviors of 304 S.S., 321 S.S., 316 LN S.S. and Incoloy 800 H in a molten salt of LiCI-Li₂O were investigated in the temperature range of 650-800℃. The oxide scales consisting of Fe₃O₄i FeCr₂O₄and Cr₂O₃ were formed in the 304 S.S., 321 S.S., 316 LN S.S. and Incoloy 800 H regardless of reaction temperature and time. The order of corrosion rate was Incoloy 800 H < 316 LN S.S. < 321 S.S. < 304 S.S.. Incoloy 800 H showed uniform corrosion behavior, whereas 304 S.S., 321 S.S. and 316 LN S.S. showed intergranular corrosion behavior. Incoloy 800 H with high Ni content exhibited the highest corrosion resistance among the examined alloys. (Received February 27, 2004)
이기종 운영체계에 기반한 고성능 트랜잭션 처리 시스템의 개발
김기형,남영환,조행래 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.2
Recently, workstation clusters have been utilized for high performance transaction processing systems. In such systems, transactions are usually processed by multi-threads. Workstations in the clusters can have heterogeneous operating systems in the viewpoint of the thread processing mechanism. This paper focuses on the portability issues which should be considered from the design stage of the workstation cluster-based transaction processing systems. Especially, this paper analyzes the differences between single-threaded and multi-threaded operating systems. Based on this analysis this paper presents the architecture of a high performance transaction processing system which works on both operating systems.
급성 심근경색증에 동반된 승모판 폐쇄부전증의 임상적 특징
정상만,조영일,조화상,유광하,송기호,인행환 건국대학교 의과학연구소 1997 건국의과학학술지 Vol.7 No.-
The early detection and proper management of mitral regurgitation(MR) associated with acute myocardial infarction(MI) is very important to improve the clinical course and outcome of disease. The change of left ventricular shape and regional function, papillary muscle rupture are major determinant of the existence and severity of MR. We performed 2D and M mode echocardiography of 28 patients at the early stage of acute MI to evaluate the existance and degree of MR and its pathogenetic factor. Significant MR occured in 12 (42.9%) patients. In the group of MI with MR, the inferior MI was frequent (7 case) than anterior MI (5 case) comparing to the patient group of MI without MR (inferior MI : 6 case, anterior MI : 10 case) (p<0.01).The left ventricular end diastolic dimension(LVEDD), end systolic dimension (LVESD) and left atrial dimension (LAD) were significantly increased in MI with MR than MI without MR (LVEDD : 57.3 ±8.6 vs 46.4 ±9.2, p<0.05 ; LVESD : 52.9 ±9.2 vs 38.3 ±7.4, p<0.01 ; LAD : 45.4 ±3.8 vs 37.7 ±3.7, p<0.05).However, the ejection fraction was not different between two group two groups. These datas showed that MR was more frequent in inferior MI and the hemodynamic derangement was more serious in acute MI with MR.
최대운동 후 회복기 스포츠마사지 처치시간에 따른 혈중 젖산 및 암모니아 농도의 변화
조기행 ( Ki Haeng Cho ),김성수 ( Soeng Su Kim ) 대한무도학회 2010 대한무도학회지 Vol.12 No.1
본 연구는 건강을 목적으로 태권도를 수련하는 태권도 동아리 소속 일반학생 7명을 대상으로 운동 후 느끼는 스트레스로 인하여 근육의 뭉침과 같은 피로를 느끼는 상태에서 피로를 회복하는 방법으로 회복운동과 휴식, 영양섭취 등 다양한 기법이 있을 수 있으나 운동 후 회복기 스포츠마사지 처치가 운동 전·후 혈중 대사산물의 젖산과 암모니아 농도의 변화를 분석하여 운동 후 스포츠 마사지가 회복에 도움을 줄 수 있는 기초자료를 제공하고자 하는 데 그 목적이 있다. 자료처리는 SPSS Window 10.0 프로그램을 이용하여 각 측정항목에 대한 평균치와 표준편차를 산출하였다. 자전거 에르고미터 최대운동 후 스포츠 마사지 처치시간에 따른 혈중 젖산 및 암모니아 농도의 변화를 알아보기 위해 repeated ANOVA를 이용하여 분석하였으며, 다음과 같은 연구결과를 얻었다. 최대운동 후 혈중 젖산농도의 변화는 스포츠마사지를 실시한 마사지 처치 30분에서 혈중 젖산농도의 제거가 빠르게 일어난 것으로 나타났다. 최대운동 후 혈중 암모니아농도의 변화는 마사지 처치 30분과 마사지 처치 15분은 안정성 회복보다 혈중 암모니아농도를 빨리 제거하였나, 마사지 처치 30분과 마사지 처치 15분간에 혈중 암모니아농도 제거측면에서 차이가 나지 않았다. 이상의 결과를 종합하면 운동 후 회복기에 스포츠 마사지 처치가 안정성 회복에 비하여 근육의 피로회복에 긍정적인 영향을 미치는 것으로 나타났다. The purpose of this study was to investigate blood lactate and ammonia concentration by sports massage treatment time after maximal exercise. seven male students of participate of taekwnondo club in K university were selected as the object of study. The 30 minutes` massage recovery group, the 15 minutes` massage recovery group, the static recovery group and the dynamic recovery group after maximal exercise were measured repeatedly to get results on the change of blood lactate and ammonia concentration by sports massage. The result of this study were as follows: First, the change of the blood lactate concentration after maximal exercise runs as follows: The 30 minutes` massage recovery group by sports massage gets rid of the blood lactate concentration fastest. Second, the change of the blood ammonia concentration runs as follows: The 30 minutes` massage recovery group, the 15 minutes` massage recovery group, and the dynamic recovery group get rid of the blood concentration faster than the static recovery group. There`s no change of the blood ammonia concentration in the 30 minutes` massage recovery group.
조명기,허길행 한국식품유통학회 2003 食品流通硏究 Vol.20 No.3
This paper aims to intensify strategies for enhancing competitiveness of the agricultural wholesale markets to cope with pooling system currently increasing rapidly at producing areas in Korea. For this purpose, the impacts of joint marketing and pooling to agricultural marketing as a whole and agricultural wholesale markets are analysed after discussion on current situations of joint marketing and pooling of farm produce. It also analyses problems of the facilities, labor productivities, and laws and regulations of the agricultural wholesale markets. Based on these analyses, it suggests various development strategies for the agricultural wholesale markets to cope with changing marketing circumstances.
Cho, Sung Haeng,Ko, Jong Beom,Ryu, Min Ki,Yang, Jong-Heon,Yeom, Hye-In,Lim, Sun Kwon,Hwang, Chi-Sun,Park, Sang-Hee Ko Institute of Electrical and Electronics Engineers 2015 IEEE transactions on electron devices Vol. No.
<P>We report the electrical characteristics of backchannel etch (BCE) metal–oxide–semiconductor thin-film transistor (TFT) comprised of aluminum-doped tin–zinc–indium oxide (ATZIO). It has high etch selectivity in wet chemical etchants, which consist of H<SUB>3</SUB>PO<SUB>4</SUB>, CH<SUB>3</SUB>COOH, and HNO<SUB>3</SUB>. This is contrary to the conventional metal–oxide–semiconductors of indium–gallium–zinc oxides, which are highly soluble in the acidic chemicals. As a result, no etch stop layer is needed to protect the backchannel from the wet etchant damage during the source and drain patterning in the bottom-gate-staggered TFT structure. This provides the possibility of oxide TFT fabrication process made as simple as that of the current amorphous silicon TFT using three or four photomasks with short channel length and less parasitic capacitance. The electrical characteristics of our ATZIO BCE-TFTs have the mobility of 21.4 cm<SUP>2</SUP>/ <TEX>$\text{V}\cdot \text{s}$</TEX>, subthreshold swing (S.S) of 0.11 V/decade, and threshold voltage of 0.8 V. In spite of the BCE structure, they have excellent stability against bias temperature stress, which shows the threshold voltage shifts of +0.75 V and −0.51 V under the prolonged positive (+20 V) and negative (−20 V) gate bias stresses for 10 000 s at 60 °C, respectively.</P>