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A METHOD ON AUTOMATIC TRANSLATION OF SEQUENTIAL PROGRAMS INTO DATA FLOW PROGRAMS
朴斗淳,黃鐘善,白斗權 순천향대학교 1987 논문집 Vol.10 No.3
기존의 Von Neumann Model 방식의 Sequential Program을 Speed-up 시키는 방법들이 연구되어왔다. 이는 Von Neumann Model방식의 Uni-processor를 사용해서 program을 execution시키는 speed-up에 한계가 있다는 것이다. 그래서 sequential program을 speed-up execution 시키기 위해서 multi-processor를 도입하였고 multi-processor에서는 program을 execution 시키는데 parallel processing을 해야만 execution time을 speed-up시킬 수 있다. 이런 parallel processing에 근거를 두고 개발 된 system 이 data flow system이다. 그러나 기존의 Von Neumann 방식의 sequential program은 data flow system에서 직접 execution 시킬 수 없다. 그러므로 기존의 sequential program을 data flow execution 시키기 위한 automatic translation 방법을 도입하였다. 이를 위하여 본 paper에서는 dependency testing algorithm 과 automatic translation algorithm을 도입하였고, 이를 이용하여 sequential program을 data flow program으로 automatic 하게 translation하였다.
有機色素(Pyronine G)의 Metachromasy에 關한 鹽效果의 吸收分光學的 硏究
朴鍾會,金一斗,宋基東 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1
The metachromatic behavior of organic dye(pyronine G) in the presence of various salt was investigated by means of absorption spectroscopy. The salts examined for the addition effect were LiCl, NaCl, KCl, NH_4Cl and (CH_3)_4 NCl. A remarkable increase in pyronine G aggregation with on increase in the salts concentration was observed. This phenomenon has been explained by the activity of counter ions from the salts which presumably reduce the repulsive force between the cationic dye molecules. But in this study the degree of aggregation differed with addition of various salts and this Is ascribed not only to the contribution of counter ions but aIso to the cations from the salt. The different changes in pyronine G aggregation are also discussed in term of the effect of the structure of water.
김동현,박종현,권오상,김두응 중앙대학교 의과대학 의과학연구소 1997 中央醫大誌 Vol.22 No.2
Since the development of magnetic stimulation as a way of assessing the function of central motor pathways, various neurologic diseases have been investigated by motor evoked potentials(MEP). This study was carried out to evaluate the usefulness of clinical application of MEP to the stroke patients. MEP were elicited with transcranial cortical stimulation using a magnetic coil in 21 healthy subjects and 18 stroke patients. Average of age was 37.5±18.0 and 63.7±7.7 years in normal and patient groups respectively. All stroke patients had a mild to severe clinical unilateral motor weakness, and also were proven to have unilateral infarction or hemorrhage at various regions of brain radiologically. During MEP studies, neither significant side effects nor pin were encountered. MEP latency of abductor pollicis brevis(APB) and extensor digitorum brevis(EDB) in controls measured 22.4±2.0 msec and 41.8±2.9 msec respectively. Normal central motor conduction time(CMCT) was 9.7±1.6 msec and 19.3±2.3 msec respectively. The amplitudes of MEP were not reliable due to great variability. Abnormal responses were noted in 5 patients on the APB and in 12 patients on the EDB motor evoked potentieal studies. Mean latency and CMCT were significantly prolonged in involved sites of the other 16 patients, comparing with control data. Prolonged latency and CMCT, increased inter-side difference of CMCT. Any potential was not a useful indicator in determining abnormality of MEP study. More paralyzed patients were apt to show abnormal responses in MEP studies. There were also more abnormal results during acute stage compared with chronic stage More abnormal results were observed in the patients with cerebral cortex or corona radiata involvements. It is suggested that MEP study is a useful and sensitive method in the evaluation of stroke patients and be a effective method for further understanding of central motor system.
40ㆍ50대 일부 남성근로자의 골감소증 및 골다공증 유병실태와 위험요인
장윤균,서현주,진영우,정미선,성숙희,박두용,김종순,김수근 大韓産業醫學會 2006 대한직업환경의학회지 Vol.18 No.2
목적: 최근 국내에서도 골다공증과 관련된 생활양식의 규명에 관한 연구가 이루어지고 있으나, 아직까지 남성 골다공증에 대한 연구가 활발하게 이루어지지 않아 40, 50대 남성근로자를 대상으로 유병률을 파악하고, 골감소증 및 골다공증 관련 위험요인을 확인하고자 하였다. 방법: 원자력발전소에 근무하는 40, 50대 남성 근로자 2,073명을 대상으로 2004년 3월~7월 기간동안 생활습관을 파악하기 위하여 자기기입식 전산입력 방식으로 최종학력, 흡연여부, 음주여부, 신체활동 횟수를 조사하였고, 골밀도검사, 체성분검사(체지방률, 허리-엉덩이둘레비), 신체계측(신장, 체중)을 시행하였고, 골밀도 검사는 Osteosys사의 EXE-3000을 이용하여 종골부위를 측정하였고, 체지방률, 허리-엉덩이 둘레비는 Biospace사의 Inbody 3.0을 이용하여 측정하였다. 통계분석은 골감소증 및 골다공증의 관련요인을 분석하기 위해 다중로지스틱회귀분석을 시행하였다. 결과: 연구대상자의 골감소증 및 골다공증 유병률은 22.8%와 3.0%이었으며, 골감소증 및 골다공증의 관련요인으로는 연령이 증가할수록, 흡연자이거나 과거흡연자일 경우, 체질량지수가 25 kg/m^(2) 미만일 경우, 30분 이상 신체활동 횟수가 주 3회 미만일 경우가 유의한 연관성이 있었다. 결론: 성인 남성 40, 50대의 골감소증 및 골다공증의 유병률이 높은 편이었으며, 골감소증 및 골다공증으로 이환을 예방하기 위하여 금연, 활발한 신체활동을 촉진하여 골밀도를 개선시키는 생활습관으로의 변화를 권고해야 할 것이다. Objective: This study was conducted to investigate the prevalence and risk factors of osteopenia and osteoporosis in 40-59 year-old male workers working at nuclear power plants. Methods: Bone density, body composition, and anthropometry data were analyzed for 2,073 subjects were carried out from March 2004 to July, 2004. Educational level, smoking status, drinking status and frequency of physical activity were investigated by self-reported questionnaires through internet to identify lifestyles related to bone mass density. Bone mass density was measured by EXE-3000 of Osteosys Co. And body fat percentage, and waist-to-hip ratio by inbody 3.0 of Biospace Co. Results: The prevalence of ostepeniaosteopenia and osteoporosis was 22.8% and 3.0%, respectively. According to multinominal multinomial logistic regression analysis, age, smoking status (current smoker and former smoker), low body mass index (< 25kg/m^(2)), and frequency of physical activity were significantly associated with osteopenia and osteoporosis. Conclusions: The prevalence of ostcopenia and osteoporosis wasseemed high for the, when it was inferred from subjects' age compared to the results of previous studies. The This study results suggeststhat it is necessary for 40-59 year-old male workers to stop smoking, and exercise regularly in order to prevent osteopenia and osteoporosis.