탄성력이 관계되는 역학적 에너지 보존에 관한 지도상의 문제점과 개선 방안

문충식,윤성현,권재술 한국교원대학교 과학교육연구소 1991 청람과학교육연구논총 Vol.1 No.1

현행 고등학교 물리 교과서와 대학 일반물리학 교재에 나타난 용수철 진자의 진동에서 역학적 에너지 보존에 관한 기준점 설정의 불명확성과 오해의 소지를 지적하고 이를 해결하기 위한 방안을 제시하였다. 혼란이 생기는 원인은 근본적으로 좌표 기준, 위치 에너지의 기준 설정에서 나타나는 것으로써 군등장인 경우, 거리에 비례하는 위치 에너지(mgx)이므로 기준을 어디에 잡아도 무방하나 그렇지 않는 탄성 위치 에너지의 경우(1/2)kx^2에는 주의를 요한다. 본 연구는 기준 위치 설정에 따라 위치 에너지 표현식이 다름을 보이고 이를 고등학교 및 대학 일반물리학 수준에서 지도할 수 있는 방안을 제시하고자 한다. A typical representation of elastic potential energy is (1/2)kx^2, where x represents the distance from the spring's unstratched end point. However, this representation will be correct only in a particular situation that the origin of the coordinate and the reference point of the potential energy are at x=0. Without this condition, the potential representation, (1/2)kx^2, is no longer correct. In this study, the misconceptions found in high school textbooks and university laboratory manual were exemined and presented a improved method to teach elastic potential energy. The generalized form of elastic potential energy with arbitrary reference point in coordinate system as well as potential energy was derived. To adopt this idea in high school level, a graphical method of deriving the generalized form of elastic potential energy was devised.

자궁출혈 환자의 자궁내막 생검의 병리학적 연구

이충식 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

The abnormal uterine bleeding is one of the most common symptoms of gynecologic patients. It can be divided by dysfuncitonal uterine bleeding(DUB) and organic uterine bleeding I investigated the clinico-pathologic relationships on the 618 endometrial specimens that submitted in the pathologic department of CNU College of Medicine due to abnormal uterine bleedingfrom Jan. 1991 to Feb. 1992. The age range was 17 to 72 years old. The causes of the abnormal uterine bleeding were DUB 413 cases(66.8%), conditions associated with pregnancy 107 cases(15.8%), chronic endometritis 36 cases(6.1%), endometrial polys 16 cases(2.6%), trophobastic disease 16 cases(2.6%), malignant tumor 2 cases(0.3%), and inadequate specimens 26 cases(4.2%), In DUB patients, anovulatory was 289 cases(69.8%), and ovulatory was 125 cases(30.2%). The endometrial hyperplasia and late secretory phase were the most common cause of the anovulatory and ovulatory uterine bleeding, respectively(66.1% ; 46.4%). In non-DUB patients, conditions associated with pregnancy were most common(52.2%).

Angiotensin Ⅱ 수용체 선택적 길항제 Losartan이 Spontaneously Hypertensive Rat 적출 대동맥의 수축에 미치는 영향

김춘식,한형수,김중영 慶北大學校 醫科大學 1994 慶北醫大誌 Vol.35 No.4

목적 : SHR의 장간막을 적출하여 장간막 혈관 관류를 시켰을 때 losartan을 2주간 처치한 군에서 대조군에 비해 norepinephrine을 투여하여 나타나는 관류압의 상승에 대한 전기자극에 의한 관류압의 비가 감소되어 나타났다. 이러한 현상의 원인을 검정하고자 하였다. 대상 및 방법 : SHR의 적출 대동맥에 90분 동안 losartan을 처치하였을 때 처치전후에 phenylephrine과 KCl에 의한 수축력의 차이를 비교하였다. 결과 : losartan 처치로 수축력이 감소됨을 확인하였다. 또 내피세포를 가진 대동맥 절편이 내피를 제거한 절편보다 수축력의 감소가 더 현저하게 나타내었다. 한편 losartan에 의한 수축력 감소 현상은 2주간 ACEI인 enalapril을 식수에 타서 먹인 경우에는 나타나지 않았다. 결론 : losartan에 의해 KCl이나 phenylephrine에 의한 수축력이 감소하는 것은 혈관에 존재하는 RAS 특히 angiotensin Ⅱ의 다른 수축제의 작용을 증가시키는 작용이 차단됨에 따른 것임을 짐작할 수 있었다. 또 내피세포를 가진 대동맥 절편이 내피세포 제거한 절편에서보다 losartan에 의한 수축력 감소를 더 현저히 보이는 현상은 내피세포가 losartan의 영향을 받아 생긴 것으로 사료된다. The perfusion pressure ratio, electrical field stimulation(40 V, 5 msec, 40 ㎐, 30 sec)-induced pressure change/norepinephrine(10^-5M, 15 ㎖)-induced pressure change, in isolated mesenteric bed was evaluated. Losartan-treated (30 ㎎/㎏/day, 2 weeks) SHR showed decreased perfusion pressure ratio compared with control. To evaluate the cause of the decrease in perfusion pressure ratio we used isolated aorta. Incubation with losartan (10^-4M, 90 min) decreased the contractile response induced by phenylephrine(10^-7M) and KCI(50 mM) and the decreased response was not shown in enalapril treated(5 ㎎/㎏/day, 2 weeks) SHR. The decreased contractile response by losartan was more prominent in endothelium intact strip and less remarkable in denuded strip. From these results we can assume that losartan decreased the contractile response by eliminating local renin angiotensin system, particularly in the endothelium of aorta and therefore by reducing the contraction amplifying effect of angiotensin Ⅱ.

고교 장거리 선수의 신체적 및 생리적 특성에 관한 비교 고찰

최충식,오인환,오창석 龍仁大學校 體育科學硏究所 1995 體育科學硏究論叢 Vol.5 No.1

The purpose of this study was to analyze the contribution of anthro pometrical physiological characteristics underlying 5000 meter running performance in high school male distance runners. It has been pointed out that a number of anthropometrical nd physical attributes such as body size, body composition, running economy, pulmonary function, cardiovascular-respiratory function and running history as well as maximal oxygen consumption have relatively association with success in the long distance running performance. Based on the statistical analysis, significant difference (p<0.05) was found between high group runners and low group runners. Enclosed is a summary of the lab test result, field test result. 1. The significant factor determining competitive success in the 5000meter run for high school male long distance runners were their maximal oxygen consumption and the level of Lactate acid.(r=0.87, r=0.86) 2. The reslationship between height and weight 5,000 meter running performance was not significant for high group and low group(r=0.37, r=0.49) 3. There was no significant relationship between percent body fat and body comosition and 5,000meter performance for both.

선 그래프 해석과 이해의 지각·인지 과정에 관한 모형 : 힘과 운동 관련 선 그래프를 중심으로

문충식,김범기 한국교원대학교 과학교육연구소 1998 청람과학교육연구논총 Vol.8 No.1

선그래프는 과학에서 정보를 전달하는 수단으로써 뿐만 아니라 실험의 결과를 해석하는 수단으로 유용하게 활용된다. 그러나 학생들은 그래프의 시각적이면서도 추상적인 특징 때문에 해석이나 이해에 상당한 어려움이 있다. 따라서 선그래프 이해의 지각ㆍ인지 과정을 분석하는 것이 매우 중요하다. 본 연구의 목적은 선그래프 해석과 이해에 관한 지각ㆍ인지 과정에서의 한 모형을 제시하는 것이다. 이 모형은 Pinker의 그래프 도식 이론과 Fisher의 정보 처리 이론에 기초를 두고 있으며, Lohse, Shah, Winn 등의 연구를 참고하여 제시하였다. 그리고 이 모형의 특징은 선그래프 문제를 해결하는 과정을 내용 독립적인 선그래프 해석과정과 내용 의존적인 선그래프 이해과정으로 나누었다. Line graphs are particularly effective in communicating relationships. They can convey vast amounts of information that cannot be communicated effectively by words or numbers alone. Thus, line graphs allow us to communicate scientific information and to see scientific data analyses. However, students are weak in their ability to comprehend line graphs because the features of line graphs are visual and abstract. McDermott et al. (1983) have shown that this is a problem even for many university students in the sciences. Then, it is very important to analyze the perceptual and cognitive processes in the comprehension of line graphs. The purpose of this study is to propose a model of line graph comprehension that includes perceptual and cognitive processes. This model is based on the graph schema theory of Pinker (1990) and the information processing theory of Fisher (1992). The major processes are the interpretation process and the comprehension process. In the interpretation process of line graphs, defined that the visual information of graphs is assimilated with the graph schema and is simultaneously accommodated to graph schema. The comprehension process of line graphs is one in which the result of the graph interpretation is assimilated with the existing conceptual schema on graphs and is simultaneously accommodated to the existing conceptual schema on graphs.

權現網漁業의 漁況과 資源의 適正利用에 關하여

張忠植,李明奎 國立統營水産專門大學 附設 水産科學硏究所 1993 수산과학연구소보고 Vol.4 No.-

멸치 總漁獲量의 60%정도를 차지하는 權現網漁業의 漁況과 資源의 適正利用을 위한 방안으로 멸치의 體長, 禁漁期와 자루그물의 코크기 사이의 關係, 最大特積的生産量을 올리기 위한 漁獲努力量의 決定등을 分析·檢討한 結果를 要約하면 다음과 같다. 1. 權現網漁業의 漁獲量은 7-15만톤으로 멸치 생산량의 60% 정도를 차지하며, 97, 98, 99해구에서 權現網漁獲量의 90%를 어획하고 있다. 2. 멸치 산란철의 평균수온분포는 10-20℃였고, 平均?分分布는 33.0-34.4‰였다. 3. 權現網漁業 主魚期의 平均水溫分布는 15-26℃였고, 平均?分分布는 32.0-34.0‰였다. 4. 흉어년과 풍어년의 산란철 주어기 동안의 수온분포는 뚜렷한 차이는 없었다. 5. 權現網으로 漁獲되는 멸치의 加入體長은 1-lOcm인데, 2-6cm가 主를 이루므로 禁魚期를 연장하던지 자루 그물의 코크기를 크게하는 것이 유리 하다. 6. 漁獲努力量과 漁獲量과의 關係式은 Yt=3.07·Xt-1.78×10^-5ㆍXt^2이 되므로, 漁獲努力量 Xt=86,236HP일 때 最大特적積生産量 Yt=132,373M/T를 올릴 수 있다. The authors studied to analyse between fishing conditions and the proper exploitage of resource in Anchovy boat seine. The results obtained can be summarized as follows; 1. The annual catch of Anchovy boat seine varied from 70,000M/T to 150,000M/T, the main fishing grounds of the Anchovy boat seine was in 97,98, 99 marine zone. 2. Distributions of yearly mean sea temperature and salinity in'the spawhing season of Anchovy were respectivly 10-20℃,33.0-33.4‰. during 1961-83. 3. Distributions of yearly mean sea temperature and salinity in the main fishing season of Anchovy boat seine were respectively 15-26℃, 32.0-34.0‰. during 1961-83. 4. The distribution tendency of sea temperature of the spawning season and main fishing season in the year of poor and rich catch was nearly same. 5. The relationship between fishing effort and catch may be expressed as; Yt=3.07Xt-1.78×10^-5Xt^2(r=-0.81) Xt = fishing effort Yt = catch

국내 할인점의 포장디자인에 대한 연구

최충식 대구대학교 인문과학 예술문화연구소 1998 人文科學硏究 Vol.17 No.-

스포츠 관광 활성화 개선방안에 관한 연구

조충현,김홍식,박은석,강성찬,이동헌 圓光大學校 附設 體力科學硏究所 2003 體力科學硏究 Vol.26 No.1

This study was conducted to investigate the effects of the marketing strategy based on the traditional wrestling, which affects the tour industry. The study used the simple random sampling method in the group of the Kwang-Ju district citizens. The group representatives were directly interviewed, and 277 interviewees replied with concern. The rest of the interviewees were not interested in the survey. The general characteristics of the interviewees -- gender, age, education, job, monthly salary. -- were used to analyze the items related to Sports Tourism in general. Sport Tourism in general Male interviewees had higher recognition over females in the interview. The rate of experience was low for both genders. According to their education, the satisfaction of sport tourism showed low rate. However, there were many answers where the interviewees, not depending on the age or gender, indicated that they will participate in the future. The policy recommended based upon the results of the study is as follows. There is a need for setting up a new strategy in order to increase participation of sports. Also, it is urgent to set up a sports theme center to raise professional sportsmen and to supply them to where they are needed.

서울 올림픽 이후의 사회체육발전과정

최충식,오준석 龍仁大學校 1990 용인대학교 논문집 Vol.6 No.-

The aim of this paper is to provide some suggestions for the development of sport for all movement in Korea by reviewing and analyzing the progress in Korean sport for all movement after the Seoul Olympic Games. With a big social change toward true democracy and human welfare, particularly after the Seoul Olympic, the field of sport in Korea has been challenged by a major issue, the promotion of sport for all movement. Since Korea is in her early stage of sport for all movement and has to prepare for the happy sport life of the people in the 21th century with sound body and sound mind, it is required to establish a long term master plan to execute the enhancement policy of national sport and physical education. The following suggestions should be included in the government sport policies which sum up the several tasks derived from the progress in Korean sport for all movement since the 1988 Seoul Olympic Games. 1. The Government philosophy of national sports promotion should lie in the three step goal of individual health, social health, and strengthening of national power. 2. The government should provide systematic and financial organizations to enable the Korea Amateur Sports Association and her affiliated federations to execute the promotion of the national sport for all successfully. 3. To ensure finance for national sport promotion, the finance of sport for all movement in the Ministry of Sport and several sources of financial income should be secured. 4. To secure public sport facilities, government, provincial and city office, and its lower official units(community office) should take charge of the finance for sport facilities according to its capacity. And existing sport facilities should be open to the public for sport for all purpose. 5. Asystematic and political reinforcement to employ sport leaders for community sport facilities should be done. And for the activitization. of sport for all and development of programs the institute of sport for all should be organized obligatorily in every Do-province and city.

跆拳道 功擊技術의 使用頻度와 得點에 關한 調査硏究 : 高等部 選手들을 中心으로

姜忠植,李啓勝 公州大學校 스포츠科學硏究所 1991 스포츠科學硏究所論文集 Vol.- No.4-5

This study is attack skills of T-K-D and the frequency of attack skills, rates of points, and rates of success. The study is three national T-D-K games of 1991. We studied attack skills of T-D-K out of 56 games 112 player, and then each round each weight, each level are separately analyzed. According to the study, each player used kicking skills 44.4 times (the average of each round is 14.8 times) on each game. Thus, the speed is more important in T-K-D attack skills than endurance. The following are frequency of various attack skills turn forward kicking is 51.2%, turn forward foot kicking is 15.9%, push kicking is 11.9%, pushing fist is 5.9%, feet kicking is 4.3%, life up-throwing is 3.3%, backward-throwing is 0.8%, the turn forward kicking shows the highest rate and backward throwing shows the lowest rate.