제7학년 과학의 조석현상 학습을 위한 교재개발과 적용

김은지,임성규 慶北大學校 師範大學 科學敎育硏究所 2007 科學敎育硏究誌 Vol.31 No.-

To help middle school students understand concept of tide, we developed a model of tide, and applied it to students in a middle school in Daegu city to find its effectiveness. The subjects consisted of 136 students of the 7th grade, divided into the experimental group and the control group. The experimental group (N=68) were given a learning cycle model, and the control group (N=68) were given a traditional lecture. The formative evaluation of the experiment was as follows: the average score of the experimental group was 6.43, and that of the control group was 5.68 (its full score 9), The result shows that the teaching method using the tidal model is more effective than the lecture-centered traditional one in helping the students understand the concept of tide. 이 연구는 조석개념에 대한 중학생들의 이해를 돕기 위해 수업에 사용할 조석모형을 개발하였다. 이 조석 모형을 활용한 수업이 중학생들의 조석의 이해에 얼마나 효과적인지 현장에 적용해 보았다. 이 연구의 적용은 대구 시내에 있는 한 중학교의 7학년 136명을 실험집단과 통제집단 의 두 집단으로 나누어 실시하였다 실험 집단(N=68)은 조석 모형을 순환학습 모형의 수업으로 실시하고 통제 집단(N=68)은 전통적 강의식 수업으로 실시하였다. 수업 후에 실시한 형성평가의 결과는,조석모형을 적용한 실험 집단의 평균점수는 6.43점(9점 만점),전통적 강의식으로 수업한 통제집단 은 5.68점으로 실험집단의 평균점수가 더 높았다. 그러므로 조석모형이 7학년 중학생 들의 조석현상의 개념이해에 효과적이었음을 보여준다.

청소년의 온라인 친구관계

김은지,이소희 숙명여자대학교 아동연구소 2004 兒童硏究 Vol.17 No.2

A change in the living pattern is happening in the flow of sudden changes of a modern society. That is the development of the communications by internet and the social relationship. Internet is not only the space that can fulfill lacking mental actions within friends in adolescence periods, but also it is used for a meeting place for friends and a place to escape from reality while transcending time and space. According to its equal characteristic not as hierarchic as adults, a friendship in adolescence accelerates social abilities and helps solving problems in social adaptations. Therefore, by investigating such friendships according to sex, school and the levels of internet addiction and the difference in adolescence's online homogeneous and heterogeneous friendships, thee exists a purpose to understand adolescence's friendships and help direct their friendships in a stable and desirable way. The samples chosen far this research were 319 students(150 males and 169 females) from 8 different co-ed middle and high schools located in Seoul, Korea. The apparatus used for measurements were the quality measure from Lee, Eun-Hae(1999) of friendships which is edited by Nam, Yoon-Ju and the questionnaire for internet addiction that was improved from the measure Young(1996) by Kang, Min-Chul and Oh, Ik-Soo(2000) and developed exclusively oir Korean adolescence were used in order to investigate the levels of internet addiction of adolescence. The collected data were used by SPSS 10.0 statistic program. In order to find out the samples' demographic background, several factors such as frequency, percentage, mean and standard deviation were produced and In order to verify the reliance of the apparatus, each measure's Cronbach's a coefficient was produced. Also, t-test was used to find out if there is a difference in homogeneous and heterogeneous friendships according to sex, school and internet addiction levels. The results of this study are as follows: 1) After looking at any difference in both online homogeneous and heterogeneous friendships by adolescence's sex, there was a significant difference. For online homogeneous friendships, male students were sensible of conflicts and as well as for heterogeneous friendships, male students were sensible even highly in such areas as mental stability, trust, assistance, recognition, enjoyment of friendship, competition and satisfaction. 2) After looking at any difference in both online homogeneous and heterogeneous friendships by adolescence's grade level, the homogeneous friendships didn't show any signifiant difference, but the heterogeneous friendships did show some distinctive differences. 3) After looking at any difference in both online homogeneous and heterogeneous friendships by adolescence's level of internet addiction, there wasn't any significant difference at all.

서울 시내 일부 중년층 남성의 금연 결정요인에 관한 연구

김 명,김은지 韓國保健敎育學會 1991 보건교육건강증진학회지 Vol.8 No.1

The purpose of this study was to investigate determinants of stop smoking. The data on which the analysis was based come from a survey of 355 middle-aged men in Seoul. The data was analyzed using proportion, X²-test, Pearson's Correlation Coefficient and Stepwise Multiple Regression. The following were the results : 1. Success rate of stop smoking is 19.9% of 229 persons who attempted to quit smoking. 2. As for the number of quit attempts, 33.3% of ex-smokers tried once; 25.4% of current smokers tried twice. 3. As for methods of quit attempts ex-smokers showed higher tendency in using will power and books/guides than current smokers who in using will power alone. 4. For the attitudes on smoking of family, the majority of ex-smokers and current smokers were opposed absolutely. 5. The main opposite to smoking were wives in cases of both ex-smokers and current smokers but More ex-smokers answered that the main opposite to smoking were others than current smokers 6. As for the measures of smoking in the office, more ex-smokers answered inviting than current smokers and more current smokers assigned a smoking spot than ex-smokers. 7. Majority of ex-smokers approve of restriction at public spot strongly. 8. As for the attitude about caution on a cigarette case, more ex-smokers insisted than current smokers. 9. There was a relation between the degree of exposure about knowledge and the degree of knowledge. 10. Stepwise Multiple Regression portray that following factors influence stop smoking in order named. (1) attitude on the smoking restriction at public spot, (2) methods of quit attempt, (3) attitude about caution on cigarette case. Even so, it turned out that these factors alone can explain only 20% of self-examination. Therefore study for the other factors ought to be continued. I submit following suggestions ending this study. 1. Continuous study of the other factors affecting stop smoking must be carried on. 2. Since there was a relation the degree of exposure about knowledge and the degree of knowledge, efficient health education is required using campaign and mass media

혈관내피세포-U937세포의 부착에 미치는 Eicosapentaenoic Acid의 효과

김은지,전재은,임현주,차성철,정의룡,조용근,조용근 경북대학교 병원 1998 경북대학교병원의학연구소논문집 Vol.2 No.1

연구배경: 역학적연구에서 어류의 섭취가 많은 집단에서 관상동맥질환의 빈도가 낮은 것이 보고되었고, 이것은 어류에 많이 함유된 불포화지방산(polyunsaturated fatty acid) 특히 eicosapentaenoic acid 때문으로 생각되어지고 있다. 본 연구에서는 동맥경화증 발생의 초기단계로 여겨지는 단핵구와 혈관내피세포 사이의 adhesion에 미치는 다불포화지방산의 영향을 in vitro system에서 관찰하고자 하였다. 방 법: 제대정맥에서 얻은 혈관내피세포를 배양하여 96 well에 옮기고 25, 50, 100, 200 ㎛ 농도의 eicosapentaenoic acid(EPA)를 6시간 동안 처리한 U937세포를 부착시켜 adhesion assay를 시행하였다. 혈관내피세포를 자극하기 위해서는 lipopolysaccharide(LPS)를 well당 100 ng씩을 투여하였다. 음성대조군으로는 LPS로 자극하지 않은 혈관내피세포에 EPA처리를 하지 않은 U937세포로 adhesion assay한 성적을 사용했고, 양성대조군으로는 LPS로 자극한 혈관내피세포에 EPA처리를 하지 않은 U937세포로 adhesion assay한 성적을 사용했다. 그리고 EPA(3.3 mM)을 5㎛ CuSO4 및 300 ㎛ asscorbic acid와 혼합하여 섭씨 37도에서 16시간 두어 산화-EPA를 만들어 같은 실험을 반복하였다. 결 과: U937세포에 25, 50, 100, 200 ㎛의 EPA로 6시간 처리하였을 때 U937세포의 생존율은 99% 이상이었다. 혈관내피세포를 LPS로 자극했을 때 adhesion assay에서 혈관내피세포에 붙는 U937세포의 수는 현저히 증가하였다. 그러나 EPA를 U937세포에 25, 50, 100, 200 ㎛의 농도로 6시간 처리 후에 lipopolysac-charide를 처리한 제대정맥 내피세포에 부착(adhesion)시켰을 때 처리한 EPA의 각 농도에 따른 부착된 U937세포의 수는 통계적으로 유의한 차이를 나타내지 못했다. EPA처리가 부착된 U937세포의 수에 영향을 미치지 못하였다. 결 론: EPA는 U937세포에 영향을 미쳐 혈관내피세포-U937 세포부착을 감소시키지는 못하였다. 따라서 EPA에 의한 혈관내피세포-단핵구 부착 억제 효과는 EPA의 단핵구에 미치는 영향에 의하지는 않는 것으로 생각되나 추후 더 많은 연구가 필요하리라 생각된다. Background : Epidemiological studies have shown correlation between low incidence of coronary heart disease and high consumption of fish products. It has been suggested that this may be due to the high content of polyunsaturated fatty acids of the n-3 fatty acid group in fish oil. In animal studies eicosapentaenoic and (EPA) inhibited attachment of monocytes to the arterial endothlium. Method : Adhesion assay was performed on the endothelial cells of the human umbilical vein with 25, 50, 100, 200 ㎛ EPA-treated U937 cells. The endothelial cells were activated with lipopoysaccharide (LPS). The adhesion assay was repeated with oxidized EPA. EPA was oxidized with CuSO4 and ascorbic acid. Result : Viability of U937 cells were not afected by concentrations up to 200 ㎛ of EPAand oxidized EPA. LPS treatment of endothelium notably increased the number of U937 cells attached to endothelial cells on the adhesion assay. However, treatment of EPA, native or oxidized, to U937 cells did not afect the number of U937 cells attached to LPS activated endothelial cells. Conclusion : EPA treatment, native or oxidized, of U937 cells did not affect U937 cell-endothlial cell adhesion. This suggests that inhibition of monocyte-endothlial cells ◎attachment by EPA is not due to the effects of EPS on monocytes.(Korean Circulatin J 1998;28(4):606-610)

대전대학교 지하수의 수질특성과 관리대책

정찬호,김은지 대전대학교 산업기술연구소 2000 산업기술연구소 論文集 Vol.11 No.2

The purpose of this study is to investigate the chemical quality and characteristics of groundwater in the area of Taejon university, and to suggest long-term strategy for groundwater management. The geology in the study area is mainly composed of Jurassic biotite granite and schistose granite, and phyllite and shistose phyllite of Okcheon system. All groundwater samples except one sample were classified into Ca-HCO3 type in chemical composition, and showed the hardness ranging from moderately hard to hard. The pH of groundwater showed weak acidic and neutral conditions. The results of factor analysis of hydrochemical data indicated that major chemical constituents of groundwater were derived by three main factors: the contribution of two different water-rock interaction processes and the effect of contamination. A part of groundwater samples showed a little high iron and nitrate content, which were likely to be influenced by contamination sources. The environmental assessment of groundwater hydrology and regular monitoring work should be carried out to maintain high quality and plentiful quantity of groundwater in Taejon University.

악성종양환자와 정상인이 발성한 모음의 좁은대역 스펙트럼값의 상관계수와 절대차이합 비교

양병곤,왕수건,조철우,김형순,김은지,권순복 한국음성과학회 2003 음성과학 Vol.10 No.4

The objective of this study was to examine two new parameters by which we could screen people with malignant vocal folds. The new parameters were the difference sums and Pearson correlation coefficients between adjacent pairs of intensity level matrices of narrow-band spectra. Audio files from the Korean Disordered Speech Database were analyzed by Praat, a speech analysis softWare, to obtain matrices of 400 intensity levels at 16 time points of each sustained vowel spectra. We limited our study to 12 normal subjects and 20 patients with malignant vocal folds who recorded at least three Korean vowels at a sound-proofed booth in Busan National University Hospital. Results indicated that the average coefficients of the abnormal subjects were much lower than those of the normal subjects while the average difference sums of the patients were much higher than those of the normal ones. Also, we found that the degree of the malignancy of the vocal folds was related to the coefficients and sums. However, some subjects at the initial stages of cancerous vocal folds yielded almost comparable coefficients and difference sums to those of the normal speakers. Further studies on larger databases will be desirable to set certain criteria or threshold levels for screening people with vocal fold diseases.

얌빈 재배형태와 재식거리에 따른 생육 및 상품수량 비교

엄미정(Mijeong Uhm),김치선(Chiseon Kim),김은지(Eunjji Kim),정현수(Hyunsoo Jung) 한국원예학회 2018 한국원예학회 학술발표요지 Vol.2018 No.10