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장성수,이헌남 漢陽大學校 學生生活硏究所 1992 大學生活硏究 Vol.10 No.-
This study supposed that motivation of helping would be different according to social and cultural background, that is, egoism or altruism. Based on difference of helping motivation, it was proposed that content of egoistic helping was fairness and content of altruistic helping was fraternity in which were social values. The nature of helping behavior were classified in term of these two different social values. Therefore, the previous results of helping research reilluminated based on conceptual framework proposed in this study. Also, it was understood previous findings of helping study conducted in different concern in terms of one meaningful framework. According discussion in this study, the limitations of previous helping research were discussed and were proposed further research.
8-Azaxanthine과 그 유도체의 합성 및 시험관내 항암 활성
李奉憲,辛貞姬,張太植,朴章洙,姜信源 부산대학교 유전공학연구소 1997 분자생물학 연구보 Vol.13 No.-
8-Azaxanthine(1), 3-β-D-ribofuranosyl-8-azaxanthine(2),3-β-D-ribofuranosyl-8-azaxanthine-5'-monophosphate(3), 그리고 3-β-D-ribofuranosyl-8-azaxanthine-5'-(3-pyridinylcarbonyl)monophosphate(4)를 합성한 후 Mouse leukemia P388,Murine mammary carcinoma FM3A, Human histiocytic lymphoma U937암세포들에 대해 시험관내 항암활성을 MTT를 이용한 방법으로 예측하고 IC_50(μmol/mL)으로 나타내었다. 그 결과, 비정상적인 염기의 N-3와 당의 C-1'glycoside결합을 가진 2는 세가지의 암세포에 대해 감수성이 좋아 IC_50이 각각 0.05, 0.06,0.06μmol/mL이었으나 항세균 활성 예측에서는 감수성을 보이지 않았다. Human histiocytic lymphoma U937세포에 대한 IC_50은 1이 0.33,2는 0.06,3은0.25그리고 4는 0.33μmol/mL로 구조 변화에 따라 서로 다른 값을 보였다. 8-Azaxanthine(1), 3-β-D-ribofuranosyl-8-azaxanthine(2),3-β-D-ribofuranosyl-8-azaxanthine-5'-monophosphate(3), 3-β-D-ribofuranosyl-8-azaxanthine-5'-(3-pyridinylcarbonyl)monophosphate(4) were synthesized. The in vitro antitumor activities of the synthesized compounds against P388 mouse leukemia,FM3A mammary carcinoma, and U937 human histiocytic lymphoma cells were determined by MTT assay. 2 with unnatural N-3 and C-1'glycoside bond had activityagnist three tumor cell lines and IC_50s of these compounds were 0.05,0.06μmol/mL against three tumor cell lines, repectively. But these compounds had no antibacterial activity. IC_50s aganist U937 human histiocytic lymphoma cells were verfied with the structural modification:IC_50s of 1,2,3, and 4 were 0.33,0.06,0.25, and 0.33μmol/mL, respectively.
마이크로-매크로 셀룰라 시스템을 위한 계층선정 기법분석
김장섭,이상헌,정우곤,최형진 成均館大學校 科學技術硏究所 1998 論文集 Vol.49 No.1
A control scheme to select the appropriate layer between macro- and microcell hierarchical structure is considered. With the assumption that the each mobile speed is known to the system. the algorithm determines the optimal velocity threshold by which the cell section performed. The optimal criterion is to minimize the Grade of Service(GOS), a service criterion in cellular telephone systems. Mobile station with faster speed relative to the determined optimal speed threshold are assigned to a macrocell, while slower moving terminals are assigned to the smaller cells, i,e.. microcells. For the evaluation purpose for the proposed scheme, two different evaluation perspectives are compared and the algorithm proves to work
배일헌,한기석,차상훈,김성진,박길선,이건국,홍장수 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2
선천성 낭성 선종양 기형은 태생 16주 이후 말단세기관지의 형성이 중단되어 미성숙기관지들과 중배엽성분들이 과도하게 증식하여 발생하는 드문 선천성 폐질환이다. CT소견은 낭종의 크기 숫자, 내용물 등에 따라 다양하나, 병변내에 정상적인 폐혈관이 보인 예는 전세계적으로 보고된 적이 없었다. 저자들은 역동적 흉부 CT상 균일한 저음영의 병변내에 정상 폐혈관상이 유지된 선천성 낭성 선종양 기형 1예를 경험하였기에 보고한다. Congenital cystic adenomatoid malformation(CCAM) is a rare pulmonary disease that is thought to be developed by abnormal proliferation of immature alveoli and other mesenchymal component from the abrupt halting of the terminal alveoli formation after 16 weeks of gestation. On CT scan, there are no consistencies regarding to size, numbers, and its contents but no cases were reported in past showing normal pulmonary vascularities. We reports a case of CCAM that showed normal pulmonary vascularities within the hypodense lesions on a dynamic chest CT
邕章祐,金載勳,朴昞俊 충남대학교 공업교육연구소 1986 論文集 Vol.8 No.3
It has been very important to evaluate the J_IC in Elastic-Plastic Fracture toughness test and to develope the certain method that we can precisely obtain the J_IC from any material. In this study, R-curve Method, Stretch Zone Method, and Ultrasonic Method are used to evaluate the J_IC of Aluminums, i.e., Al 2024, Al 5083, Al 7075. The echo energy of Ultrasonic Method increased rapidly in the unstable crack growth stage and then it is decreased at less rapidly slope. Therefore, the value of J_IC exists between linearly decreased region and the point of deviation. J_IC can be obtained precisely by Stretch Zone Method and approximately obtained by Ultrasonic Method. Stretch Zone Method can be used to evaluate J_IC very quantitively, but we have the trouble with the method in measurement. Ultrasonic method is required that the research for the more exact evaluation about correlation between echo energy and the crack openning behavior of precrack tip will be continued.
장경훈,이정훈,최연성,김장형 濟州大學校 情報通信硏究所 1998 情報通信硏究所論文集 Vol.1 No.-
In this paper, we implement ITU-T Recommendatio H.323^[3] that is multimedia communication system. Video conferencing system is implemented software using RTP, H.261^[1.9] and G.721^[9] by Visual C+ + 5.0 language in Windows-95. Also Video post-office box is implemented. We should prove the result of H.323 through experiment.
배일헌,한기석,차상훈,김성진,박길선,홍장수 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2
뇌혈관내 공기 색전증은 뇌혈관 조영술, 혈관내 도자술 시행시 발생하여 매우 심각한 합병증을 유발할 수 있다. 그러나 기흉의 합병증으로 발생한 경우는 보고된 적이 없다. 저자들은 기흉에 의하여 발생한 뇌혈관내 공기 색전증 1예를 경험하였기에 보고한다. Cerebral arterial air embolism is a potentially fatal event that may occur during the cerebral angiography and intravascular catheterization. The CT findings of cerebral arterial air embolism following pneumothorax have not been reported. We report a case of cerebral arterial air embolism following pneumothorax, and describe the CT findings.