용융 AI-10Si 합금의 산화피막강도 및 표면 미세조직에 미치는 Mg첨가의 효과에 관한 연구

김길수,양중식,김기주,백영남 慶熙大學校 材料科學技術硏究所 1992 材料科學技術硏究論集 Vol.5 No.-

This study was carried out to determine the strength of oxide skins of Al-10Si alloy melts and the effect of Mg addition on the morphology of oxide skins as the practical alloy for automobile piston. This has been observed by Rotational Die Movement Equipment for the temperature range from 600℃ to 720℃, the oxidation time range from 2 min. to 60 min. and the Mg weight percent(wt %) range from 1% to 5%. As the surface temperature and the surface oxide time of alloy melts increased, the crystalization of oxide layer and the creation of oxides were verified.

敎科別 集團奬學의 模型 開發을 위한 硏究

權吉重 漢陽大學校 敎育大學院 1989 敎育論叢 Vol.6 No.-

Teachers in general have potential abilities to teach their subject matters more effectively than they actually do now. They also have desires to realize their potentialities in cooperative organizations. Therefore, conditions and atmospheres in a school organization to encourage group supervision are to be formed by creating cooperative 'colleague relationship' between teachers and supervisors. The instructional supervision will accomplish its primary functions when the teachers have a positive and permissive attitudes to believe that eir instructions will be improved through the supervision. Most teachers are not, however, willing to improve and understand supervision, and they do not have permissive attitudes toward it. They not trust in the supervisors and they do not believe that supervision helps them to improve their teaching skills. This study has been conducted with the objectives of developing a model of instructoinal supervision in which teachers show the least resistance against the supervision and they actively take part in improving their teaching skills. The purpose of this study is to develop theoretically an expertise-oriented instructional supervision model. In this study was have reviewed various theories and examined the present conditions and problems of instructional supervision, and then we have tried to find out the relationship between collective effectiveness and supervision. We have also examined, based on this study, a model of informal and collective supervision. the conclusions of the study are as follows: Firstly, the group supervision model by subject matters is a of supervision which can be readily applied to instructional supervision for the following reasons: 1) The collective supervision by this method replaces inspection-view with the problem-solution view, minimizes the tangible authority the supervisors, and maes possible the 'give-and take' relationship between teachers and supervisors. 2) It is effective in helping the teachers to readily improve their teaching skills and in arousing their achievement motivation, be it increases the colleagueship between the teachers and gives them satisfaction with its results. 3) It gives teachers more opportunities to get their specialty recognized in the group, and lets them directly experience the effects of the supervision obtained through cooperation. Secondly, group supervision by subject matters is a model of supervision which intends for cooperative peer supervision or individual supervision. The teacher's acceptant posture will be increased through the problem-solution process during the collective supervision, and the supervisor will be able to choose a form of supervision which is suitable to each of teachers. Thirdly, the model of teaching plan supervision is a form of informal supervision which can be applied to the teacher who has a strong will to improve hs teaching skill but does not want to show his teaching activities to others for various reasons. This is also a means of supervision by which a supervisor can do his job without teacher1s resistance.

일정전압 조건하에서 Rose Bengal과 Nal로 감응 및 초감응된 광전류의 전기화학적 고찰

윤길중,김재훈 金烏工科大學校 1989 論文集 Vol.10 No.-

Rose Bengal sensitized and NaI supersenitized photocurrent on an amorphous SnO₂semiconductor was analized electrochemically under the potentiostatic condition. The results indicated that electron was injected from adsorbed and excited dye molecule into the conduction band and surface of SnO₂.

SnO₂박막의 물리적 성질이 염료감응 전류에 미치는 영향

윤길중,장진해 金烏工科大學校 1989 論文集 Vol.10 No.-

Control of thickness, concentration of dopant and preparing temperature was carried out in the process of manufacturing the electrode. And the effects of physical and electrochemical properties of thin film Sno₂semiconductor electrode on the dye sensitized photocurrent were investigated systematically. The results showed that there is an optimum condition for maximum condition

현대성 속의 전통 : 스타인과 앤더슨

김길중 서울대학교 국제지역원 1993 국제지역연구 Vol.2 No.1

이 논문의 의도는 미국문학에서 거트루드 스타인과 셔우드 앤더슨이 차지하는 일정한 역사적 의미와 역할을 규정하면서 그들의 문학이 지향하는 바가 어떻게 현대적이고 이 현대적 정신이 어떻게 미국적 상상력의 소산인가를 대표적인 작품과 자서전을 통하여 밝히려는데 있다. 논문은 모두 네 부분으로 구성되어 있는데, 제 1장에서는 주로 전기적 사실에 근거하여 이 두 작가의 개성과 역할에 관한 문학적 내지 문학사적 의의를 규명하였고, 제 2장의 스타인론에서는 비교적 전통적인 초기의 Three Lives에서 극도로 실험적인 Tender Buttons에 이르는 소위 스타인 문체의 전개과정을 논의하면서 이 파격적 모더니즘의 징후가 휘트먼류의 낙관적 자아탐닉의 소산임을 지적하였으며, 제 3장의 앤더슨론에서는 주로 Winesburg. Ohio와 Dark Laughter의 분석을 통하여 로렌스 내지 프로이드적인 직관으로 사회의 인습적 가치를 부정하는 이 작가의 현대적 정신에서 트웨인과 휘트먼의 에덴과 민주주의의 미국적 상상력이 얼마나 큼 배경인가를 밝히고 있다. 제 4장은 결론인데, 스타인과 앤더슨이 함께 계도한 미국 모더니즘은 새로운 국면이면서도 유럽 모더니즘의 반전통과 고립, 허무의식과 달리 트웨인과 휘트먼의 긍정과 낙관의 비젼을 일면 물려받고 있음을 논하였다. The main object of the present study is bifocal: to adumbrate the significant roles of Gertrude Stein and Sherwood Anderson in the specific historical phases of American literature and to define the central characteristics of their imagination in the light of national tradition as well as modernist perspectives. The rationale of the comparison is grounded in two simple facts of history plus and observation: that the two writers were devoted life-long friends reciprocating sympathy and admiration between them; that both of them, born in the 1870's were a guiding influence on some of the most important literary moderns of the following generation notably including Faulkner and Hemingway; and that it would be meaningful to examine and define the common denominator that binds them together. The discussion proceeds in the division of four parts. In part One, lives of the two writers are selectively reviewed with an especial focus on the formation of literary minds, their own definition of self, the range of influence they exercised, and the issues of modernity in their achievements. The second and third parts concentrate on stein and Anderson respectively. the discussion of Stein is focused on the significance of her experimental style which, starting mildly with the Flaubertian three lives, could go, by way of prolific "steinese", as far as to the extremes of Tender Buttons. The heart of her modernist gestures is Whitmanesque self-celebration, a turing back to the american tradition of innocence and acceptance. Anderson is discussed with regards to his Lawrentian and Freudian vision as reflected in Winesburg, Ohio and Dark Laughter. He is modern in his rejection of repectable society and in his embrace of the conceptual frameworks of our century. But in his undoubting indulgence in the poetic vision, which is bought at the cost of realism, Anderson inherits the American tradition of the Edenic and democratic optimism by way of Twain and Whitman. The concluding fourth, part considers the necessary distinction of American modernism, of which Stein and Anderson were progenitor and/or mentor, from the mainstream European modernism and its inherent nihilism. Here, aspects of such distinction as represented by these two writers, including colloquial easefulness in style, are seen as part of the afore-mentioned American literary heritage.

화물터미널 건립의 경제적 분석에 관한 연구 : 익산시(춘포면) 만경강 하천부지를 중심으로

김중식,배종길 조선대학교 경영경제연구소 2002 經營經濟硏究 = Management and economics research Vol.25 No.1

쑥 과산화효소 촉매력의 pH 의존성에 관한 연구

윤길중 청주대학교 산업과학연구소 2006 産業科學硏究 Vol.24 No.1

An enzyme electrode for the determination of hydrogen peroxide was developed by immobilization of mugwort tissue in a carbon paste, and the effect of pH on ell catalytic power was investigated. Current profile of the biolenlor well pH slowed two peaks, which mean that mugwort contains two kinds of peroxide. Assuming that the reduction function of peroxide is Gaullist distribution std pH-dependent current profile is the sum of two Gosling, current profiles were resolved into two galloons at various monitoring concentrations of substrate. This enabled to determine the optimum pH of each ilozyme.

Heparin이 망내계세포에 미치는 영향에 관한 초미형태학적 연구

이동철,김중길,임정교,손윤경,서인수,손태중 慶北大學校 醫科大學 1991 慶北醫大誌 Vol.32 No.3

저자들은 heparin 투여후 세망내피계의 초미형태학적 변화를 관찰하기 위해 Sprague-Dawley계 숫쥐에 heparin과 endotoxin을 투여한 후 비장을 채취하여 실험에 이용하였다. 실험군은 heparin 전처치군과 heparin 후처치군으로 나누었으며 비교군으로 heparin 단독투여군과 endotoxin 단독투여군을 설정하여 각각을 투약후 비장을 채취하여 광학현미경 및 전자현미경적 검색을 실시하였다. 실험결과를 요약하면 heparin 단독투여군은 대식세포, 형질세포양 림프아구 및 다핵백혈구가 증가되었고, 대식세포의 탐식능도 항진되었다. 그러나 대식세포자체의 소기관 발달은 현저하지 않았다. Endotoxin 단독투여군은 시간이 갈수록 대식세포의 탐식능이 저하되고, 파괴가 증가되어 수가 감소하였다. 미소혈전이 자주 관찰되었으며 기타세포들의 파괴가 관찰되었다. Heparin 전처치 및 후처치군은 공히 endotoxin군에 비해 대식세포 탐식능이 증가되었다. 이상의 성적으로 보아 heparin의 망내세포에 대한 영향은 주로 대식세포의 탐식능과 수의 증가로 생각되며 이는 정상 및 병적상태 모두에서 일어난다고 생각된다. 또한 ET 투여 전후 heparin을 투여한 실험군에서 공히 대식세포 탐식능이 증가되었으므로 이는 ET shock 후 조직손상으로 분비되는 세망내피계 저하물질에 대해 heparin이 길항작용을 할 것으로 생각된다. 또한 heparin의 대식세포 탐식능항진에 대한 효과는 세포의 직접적인 자극이라기 보다는 탐식과정중 특히 oposonization에 효과를 미칠 것으로 생각된다. The authors studied an ultrastructural changes of reticuloendothelial system after administration of heparin. Male Sprague-Dawley rats were examined after administration of heparin and endotoxin. The experimental groups were divided into heparin pretreated groups and heparin posttreated groups. The control groups were divided into heparin-only groups and endotoxin-only groups. Each animals were sacrificed and spleens were extirpated and examined by light and electron microscopy. The results obtained were summarized as follows: Heparin-only groups showed proliferation of macrophages, lymphocytes and neutrophils. The phagocytic activity of marcophage is enhanced. The cytoplamic organellar change is not remarkable except increase of secondary lysosomes. Endotoxin-only groups showed decrease of phagocytic cells. The phagocytic activity is also depressed. Destruction of macrophages and other cells are noted. Microthrombi are frequently seen. Both heparin pretreated and heparin posttreated groups revealed relative enhancement of phagocytic activity compaired to endotoxin-only groups. From the result of the experimental study, it appears that the effect of heparin on the reticuloendothelial system is enhancement of phagocytic activity of macrophages both in the coditions of normal and pathologic one. And it also suggests that heparin may act as an antagonizing factor to the reticuloendothelial depressing agent that may be derived from injured organ of endotoxin shock. And the effect of heparin to the phagocytic activity of macrophage may be related to the process of phagocytosis such as opsonization or to the direct cellular stimulation.

Interleukin-2를 이용한 진행성 위장관암의 비장을 경유한 자가 LAK Cell의 면역학적 반응

안우섭,강중신,김인호,전석길,손수상 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.3

To elucidate the anticancer effect by observing the effect of LAK cells after infusion of IL-2 through splenic artery for the advanced gastrointestinal cancer, randomized study was performed for the 8 patients who had liver metastasis from gastic and rectal cancer. 4 patients were performed subtotal gastrectomy for stomach cancer and the others were done abdominoperineal resections for rectal cancer. The liver metastasis were noted all of the cases after surgery between October 1989 and December 1992 at the Department of Surgery, Keimyung University School of Medicine. After confirmation of the hepatic metastasis from gastorintestinal cancer, we performed selective splenic arterial infusin of IL-2 with the dosage of 20,000 units/kg B.W. We checked the immune function pre-and post-IL2 infusion therapy, such as total lymphocyte count, T-cell percentage and CMI multitest with blood count and hepatorenal function. There was no difference between the pre-and post IL-2 infusion in the hemoglobin, serum protein, albumin, BUN and creatinin. The total lymphocyte counts of pre-and post IL-2 infusion were 1641.2 and 1727.4, respectively. The T cell percentage of pre-and infusion were 62.51% and 64.27%, respectively and had the tendency to increase in comparison with pre-IL-2 infusion, but there were not stastical differences. The results of CML muiltitest of pre-and post IL-2 infusion were not definite differences. From the above results, it could be suggested that LAK cell after infusion of IL-2 via selective splenc artery had the slightly positive effect of the immune function of advanced gastrointestinal cancer patient, with hepatic metastasis.

영아기 자녀의 발달 수준에 대한 어머니의 지식정확도

심성경,변길희,박주희,박경신,김중근 이화여자대학교 교육과학연구소 2006 교육과학연구 Vol.37 No.3

본 연구는 현재 0~36개월 영아를 양육하고 있는 어머니를 대상으로 0~36개월 영아의 발달 수준에 대한 지식의 정확도를 알아보고 영아 및 어머니의 배경변인에 따른 어머니의 지식 정확도의 차이를 살펴보는 것이다. 연구대상은 전라북도에 거주하는 생후 36개월 이하 영아의 어머니 218명이다. 영아기 자녀의 발달 수준에 대한 어머니의 지식 정확도를 알아보기 위하여 이영석(1998)이 만 2세 이하 영아의 발달수준 조사를 위해 제작한 도구를 사용하였다. 연구 결과 현재 양육하는 영아기 자녀의 발달 수준에 대한 어머니의 지식정확도는 전체와 하위영역 모두에서 50% 내외의 정답율을 보여 낮은 수준의 정확도를 나타냈으며, 1세아 어머니의 경우 0세아와 2세아 어머니에 비해 특히 낮은 지식정확도를 보였다. 또한 영아 및 어머니의 배경변인에 따른 발달 수준에 대한 어머니의 지식 정확도는 차이가 있었다. 즉 0세 어머니의 경우 영아의 출생순위, 어머니의 연령에 따라, 1세아 어머니들은 영아의 성, 어머니의 연령과 학력에 따라, 2세아 어머니의 경우 어머니의 학력에 따라 영아기 자녀의 발달수준 대한 지식정확도에서 유의한 차이를 나타냈다. The purpose of this study is to investigate the mother's accuracy on the knowledge of infant's developmental levels and analyze the differences according to infant gender, birth order, mother's age, education level, and job. The questions for this research are as follows : 1. What is the accuracy of the knowledge of mothers about their infant's developmental levels according to their infant's age? 2. What is difference in accuracy of the knowledge of mothers about their infant's developmental levels according to infant gender, birth order, mother's age, education level, and job? The subject of this study were 218 mothers with infants aged from 0 to 36 months at J and I city in Jeonbuk. The instrument of this study is "The rating scale of knowledge of infant's developmental levels" of Young-suk, Lee(1998). The collected data has been analyzed by mean, SD, percentage, t-test and F-test with SPSS/PC 11.0 Program. The results of this study are summarized as follows : 1. The accuracy of the knowledge of mothers' with their infant's developmental levels is low. Specially, the accuracy of the knowledge of mothers with a 1 year old infant is very low 2. There are differences in the mothers' accuracy of the knowledge about their infant's developmental levels according to infant gender, birth order, mother's age, education level, and job. In the cases of 0 year old infants the mother's accuracy of knowledge showed a difference according to the infant's gender, mother's age, education level, and job. In the case of 1 year old infants the infant birth order, mother's age, and for the 2 year old infant the mother's education level affected the mothers' accuracy of knowledge.