사회과에서 인터넷 활용수업이 네트웍 리터러시 함양에 미치는 효과

강운선,김종혜 대구대학교 2006 대구대학교 학술논문집 Vol.1 No.2

이 연구의 목적은 인터넷 활용수업이 중학생들의 네트웤 리터러시 함양에 미치는 효과를 밝히는 것이다. 본 연구에서는 인터넷 활용수업의 방법으로 온라인 카페를 활용한 수업을 진행하였으며, 인터넷 활용수업을 적용한 학습자 집단의 네트웤 리터러시 점수가 전통적인 강의식 수업을 활용한 학습자 집단보다 높다는 가설을 설정하였다. 이를 검증하기 위하여 대구의 능인중학교 1학년 학생을 연구대상으로 선정하였다. 연구대상을 실험집단과 통제집단으로 구분하고 교사변인과 수업내용을 통제하기 위하여 동질성을 확보하였다. 지능과 사회경제적 지위가 학업성취도에 영향을 미칠 가능성을 통제하기 위하여 지능과 사회경제적 지위를 통제변인으로 선정하고 수업방법을 가변수로 처리하여 회귀분석을 실시하였다. 분석결과 인터넷 활용수업을 적용한 집단의 네트웤 리터러시 점수가 전통적인 강의식 수업을 적용한 학습자 집단보다 평균점수가 4.48보다 높게 나타났으며, 그 차이는 통계적으로 유의하였다. This study had an object to present the way of internet in education in sociology, and to prove the effect of internet in education on network literacy cultivation. In relation to this study, internet in education and traditional teaching method were carried out in every class. After that, this study proved the difference of two lessons in network literacy cultivation. For the purpose of this study, a hypothesis was established as follows; Internet in education group will get higher marks than traditional teaching method group in evaluation marks of network literacy. To verify this hypothesis, experimentation was carried out by selecting two classes of boys' middle school in Daegu and they were divided into experiment group and control group. The two groups selected as a sample group were treated according to the following procedure. This study applied the value of Cronbach α to verify trust-degree in a means of measurement, and used multiple regression analysis to analyze the opposite effect in methods of classes. As a result of this study, the group of internet in education got higher marks so much as 4.884 than the group of traditional teaching method for evaluation marks of network literacy. Accordingly, the hypothesis of this study was selected and this study could conclude internet in education was a effective method upon network literacy cultivation by increasing access, analysis, evaluation, mental capacity in information.

미세채널 구조물 상부의 초정밀 연마 기술 연구

강정일,이윤호,안병운,윤종학 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

Micro-Channel ultra-precision polishing is a new technology used in magnetic field-assisted polishing. In this paper, an electromagnet or the jig of test system was designed and manufactured. A size of magnetic abrasive is used on 25~75μm and for the polish a micro-channel upper part. A surface of channel which is not even is manufactured using magnetic abrasive finishing at upper surface of micro-channel. As a result, the surface roughness rose by 80% after upper surface of micro- channel was polished up 8 minutes by polishing.

最近에 經驗한 氣道 및 食道異物에 對한 考察

姜基澤,朴鍾雲 全南大醫大 1964 전남의대학술지 Vol.1 No.1

운동부하 흰쥐에서 포도당 증합체가 심근 당원에 미치는 영향

이석강,조성현,김용운,박덕일,김종연,장용찬 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.1

운동부하전 섭취한 탄수화물이 운동흰쥐의 심근 및 골격근이 당원량에 미치는 영향을 측정하여 심근과 골격근의 대사적 차이점의 일단을 연구한 본 논문의 결과는 다음과 같다. 심근과 골격근 당원량(mg/ g wet tissue, 이하 단위 동일)은 정상군에서 심근 2.62±0.51로서 골격근의 3.37±0.58보다 낮았다(p<0.01). 심근 당원량은 정상군이 2.62±0.51이었다. 운동 30분에서 대조군은 정상군의 63%수준으로 감소하였으며(p<0.01), 탄수화물섭취군은 정상군의 86 및 90%수준으로 감소하였으나 통계적으로 유의한 차이는 없었다. 탄수화물 섭취군의 당원량은 대조군의 142 및 137%정도로 양군 모두 대조군보다 유의하게(p<0.01) 높았다. 운동 60분에는 대조군은 운동30분의 78%(정상군의 49%)수준으로 감소하였으며(p<0.05) 탄수화물섭취군은 포도당중합체 및 포도당섭취군에서 각각 운동 30분에 비하여 72(p<0.01, 정상군의 62%), 81%정도(p<0.05, 정상군의 73%)로 감소하였다. 포도당 섭취군의 당원량은 대조군의 147% 정도로 대조군보다 유의하게(p<0.01) 높았다. 운동 120분에서 대조군은 운동 60분에 비하여 63%(정상군의 33%) 수준으로 감소하였으며 (p<0.01) 포도당섭취군은 운동 60분의 69%(정상군의 50%)수준으로 유의하게 감소하였으나, 포도당 중합체 섭취군은 차이가 없었다. 탄수화물 섭취군의 당원량은 포도당 중합체 및 포도당섭취군에서 각각 대조군의 202 및 162% 정도로 양군 모두 대조군보다 유의하게(p<0.01)높았다. 골격근 당원량은 정상군이 3.37±0.58 이었다. 운동 30분에서 대조군은 정상군의 69% 수준으로 감소하였으며(p<0.01) 탄수화물섭취군은 포도당 중합체 및 포도당섭취군에서 각각 정상군의 85 및 88% 수준으로 감소하였으나 통계적으로 유의한 차이는 없었다. 탄수화물 섭취군의 당원량은 포도당 중합체 및 포도당섭취군에서 각각 대조군의 125 및 129% 정도로 양군 모두 대조군보다 유의하게(p<0.05) 높았다. 운동 60분에는 대조군은 운동 30분의 77%(정상군의 53%) 수준으로 감소하였으며(p<0.05)탄수화물섭취군은 포도당중합체 및 포도당섭취군에서 각각 30분에 비하여 93(정상군의 80%), 89(정상군의 78%) %정도로 감소하였으나 통계적으로 유의하지는 않았다. 포도당중합체 및 포도당 섭취군의 당원량은 각각 대조군의 152 및 149% 정도로 대조군보다 유의하게 (p<0.001) 많았다. 운동 120분에서 대조군은 운동 60분에 비하여 50%(정상군의 26%) 수준으로 감소하였으며(p<0.001) 포도당 섭취군은 운동 60분의 75%(정상군의 58%)수준으로 유의하게(p<0.05) 감소하였으나 포도당 중합체 섭취군은 대조군의 84%(정상군의 67%)정도로 감소하는 경향을 보였다. 탄수화물 섭취군의 당원량은 포도당 중합체 및 포도당섭취군에서 각각 대조군우ㅢ 255 및 221% 정도로 양군 모두 대조군보다 유의하게(p<0.001) 높았다. 이상의 결과로 미루어 보아 심근과 골격근 간의 생리, 생화학적 특성의 차이에도 불구하고 탄수화물의 섭취후 중등도 정도의 달리기 운동시 근 당원의 함량에 미치는 영향은 정도의 차이는 있으나 같은 경향을 나타내었으며, 골격근에서 심근보다 더 많은 근 당원 절감효과를 나타내었다. 또한 운동전 탄수화물의 섭취시 이러한 근 당원 절감 효과로 장시간의 운동시 심근 및 골격근 당원의 고갈 지연으로 운동수행능력의 증가가 기대되며, 특히 포도당 보다는 포도당 중합체의 섭취시 효과가 더 크리라고 사료된다. The purpose of this study was to investigate the effect of glucose and glucose plymer ingestion on the concentration of the cardiac muscle glycogen at 30, 60 and 12 minutes of the treadmill running in rats. Rats were randomly assinged to normal, control, and carbohydrate groups. Carbohydrate group was divided into glucose, and glucose polymer ingested rats. The experiment was carried out after overnight fasting. Rats were administrated either water (control) of carbohydrates of formulated glucose(6%), and glucose polymer(6%) via polyethylene tube to the stomaach before treadmill run. Exercise was loaded by a treadmill run at the speed of I ㎞/hr for 30, 60, and 120 minutes. The results of experiment were as follows: Glycogen content of the cardiac muscle was lower than that of the skeletal muscle (plantaris) in normal rats. Glycogen content of the cardiac muscle was decreased in proportion to the exercise time compared to normal in control and carbobydrates ingested rats. It decreased in control, glucose, and glucose polymer compared to normal rats in decreasing order at 120 minutes treadmill running (% change of glycogen content of control, glucose, and glucose polymer compared to normal rats were 33, 50, and 63% in the cardiac muscle at 120 minutes of treadmill running respectively). Glycogen content of the skeletal muscle was decreased in proportion to the exercise time compared to normal in control and corbohydrates ingested rats. It decreased in control, glucose, and glucose polymer compared to normal rats in ecreasing order 120 minutes treadmill running(% change of glycogen content of control, glucose, and glucose polymer compared to normal were 26, 58, and 67% in the cardiac muscle at 120 minutes of treadmill running respectively). Change of the glycogen content of the cardiac and the skeletal muscle during treadmill running after glucose and glucose polymer ingestion showed that both muscles had tendency to decrease in proportion to exercise time similarly in control and carbohydrates ingested rats. Decreasing rate of glycogen content of cardiac and skeletal muscles during treadmill running compared to normal in carbohydrates ingested rats was lower than that of control. From these results, it is suggested glycogen content of cardiac and skeletal muscles had tendency to decrease in proportion to exercise time similarly in control and carbohydrate ingested rats. Glycogen content of cardiac and skeletal muscles in carbohydrate singested rats less decreased than that of control during treadmill running compared to normal. Glucose polymer of the carbohydrates ingested rats in considered as the most effective for glycogen sparing according to exercise time in both muscles. Therefore, intake of carbohydrate, especially glucose polymer, before exercise may be increase performance of the prolonged moderate exercise.

씨름선수에서 체중 감량과 회복기의 Leptin과 PAI-1 변화

김용운,도경오,권태동,박덕일,장응찬,박소영,김종연,이석강 대한스포츠의학회 2000 대한스포츠의학회지 Vol.18 No.2

Obesity which is defined as accumulation of excess body fat, is central factor of insulin resistance syndrome. Recently, it is revealed tat adipose tissue is not simply an energy storage organ but it also secretes a variety of molecules which affect the metabolism of the whole body, those are leptin and plasminogen activator inhibitor-1(PAI-1). Therefore, leptin and PAI-1 are increased in the obese state. Leptin regulates energy homeostasis and satiety and PAI-1 regulates fibrinolytic system. For these reasons, elevated levels of leptin and PAI-1 are considered as link factors between obesity and insulin resistance syndrome. However, the exact regulating mechanism for serum levels of leptin and PAI-1 is not fully understood yet. In this study, to evaluate the regulating mechanisms of serum levels of leptin and PAI-1 according to the weight changes, we measured leptin, PAI-1, physical, metabolic, and endocrine parameters during 10 days of weight reduction and 10 days of regain period in 7 young athletes. The mean body weight change was -4.7 kg(5.0%) in the weight reduction period and -2.4 kg(2.5%) in the weight regain period compared to baseline value. Baseline level of leptin in athletes was 1.7±0.66 ng/ml, which was significantly correlated with body weight, BMI, percent body fat, body fat mass, triglyceride, insulin, and PAI-1. Baseline level of PAI-1 in athletes was 16.6±5.26 ng/ml, which was significantly correlated with body weight, BMI, triglyceride, insulin, and leptin. Leptin was decreased to 0.7±0.39(44% of the basaline value) in the weight reduction period, and increased to 1.9±0.64(119% of the baseline value) in the regain period. PAI-1 was decreased to 7.4±2.72(44% of the basaline value) in the weight reduction period, and increased to 22.8±7.33(138% of the baseline value) in the regain period. The changes of leptin during weight reduction period were significantly correlated with the changes of insulin(r=0.890, P<0.01) and triglycerides(r=0.874, P<0.01). The changes of PAI-1 during weight reduction period were significantly correlated with the changes of FFA(r=0.889, P<0.01) and triglycerides(r=0.869, P<0.05). The changes of both leptin and AAI-1 during weight regain period were significantly correlated with the changes of insulin(r=0.755 and 0.849, P<0.05, respectively). In summary, these results suggest that serum levels of leptin and PAI-1 were affected by weight cycling, the percentages of change were more greater than that of weight change, and rebound phenomena were occurred during weight regain period.

代替然料로서 米糖油의 噴霧微粒化에 관한 硏究

朱恩選,姜大雲,金鍾天 慶尙大學校生産技術硏究所 1995 生産技術硏究所論文集 Vol.11 No.-

Experiments were conducted to investigate the atomization characteristics of rice-bran oil which is an alternative fuel. For the study, an ultrasonic system, an injection system, and six different nozzles(three kinds of single-hole type and three kinds of pintle-type) were made To investigate the effects of ultrasonic energy on a high viscous fuel, an immersion method and a phase doppler particle analyzer were used for the measurements of droplets distribution. Diameters of rice-bran oil droplets were apparently decreased by applying the ultrasonic energy, with the increasing open pressure, and when samples were collected at more distant position from the nozzle.

Effects of Nelumbinis Semen on Contractile Dysfunction in Ischemic and Reperfused Rat Heart

Kim, Jong-Hoon,Kang, Moon-Kyu,Cho, Chong-Woon,Chung, Hwan-Suck,Kang, Chang-Woon,Parvez, Shoukat,Bae, Hyun-Su The Pharmaceutical Society of Korea 2006 Archives of Pharmacal Research Vol.29 No.9

Nelumbinis Semen (NS), or lotus seed, is one of the most well-known traditional herbal medicines and is frequently used to treat cardiovascular symptoms in Korea. The anti-ischemic effects of NS on ischemia-induced isolated rat heart were investigated through analyses of changes in blood pressure, aortic flow, coronary flow, and cardiac output. The subjects in this study were divided into two groups: a control, untreated ischemia-induced group, and an ischemia-induced group treated with NS. There were no significant differences in perfusion pressure, aortic flow, coronary flow and cardiac output between the groups before ischemia was induced. The supply of oxygen and buffer was stopped for ten minutes to induce ischemia in isolated rat hearts, and NS was administered during ischemia induction. NS treatment significantly prevented decreases in perfusion pressure, aortic flow, coronary flow and cardiac output under ischemic conditions (p<0.01). In addition, the mechanism of the anti-ischemic effects of NS was also examined through quantitation of intracellular calcium content in rat neonatal cardiomyocytes. NS significantly prevented intracellular calcium increases induced by isoproterenol (p<0.01). These results suggest that NS has distinct anti-ischemic effects through calcium antagonism.

연구논문(硏究論文) : 호텔기업 종사원의 직무변화가 직무불안정성과 조직시민행동에 미치는 영향

윤종운 ( Jong Woon Youn ),정강국 ( Kang Kuk Jung ),최종학 ( Jong Hak Choi ) 한국관광산업학회 2010 Tourism Research Vol.30 No.-

The purpose of this study is to inquire into how hotel corporations can lower the job insecurity for their survivors, and get the desired result in any array in the process of restructuring, by establishing a theory of what does the job insecurity for their survivors on hotel employees raise the results, and empirically analyzing this theory on survivors in hotel corporations, which the restructuring was undergone. For this, this study intends to be carried out with a specific objective as follows. First, it intends to arrange the theoretical concept and results of precedent studies based on the job change(change in job technology, change in job performance competency), job insecurity and organizational citizenship behavior of organizational members with reference to the job insecurity. Second, it intends to analyze the effect of job change on job insecurity. Third, it intends to furnish basic data for an efficient and scientific management of human resources in hotel corporations based on the effect of job insecurity on organizational citizenship behavior. The SPSS WIN 12.0 was applied to analyze the collected data. For the analytical technique, statistical analyses - frequency analysis, factor analysis, reliability analysis, simple regression analysis, - were carried out.

Poster Session : Model Organisms and Disease ; Anti-ischemic effect of Aurantii Fructus on contractile dysfunction of ischemic and reperfused rat heart

( Chong Woon Cho ),( Jong Hoon Kim ),( Moon Kyu Kang ),( Hwan Suck Chung ),( Jae Yoon Kim ),( Na Youn Lee ),( Chang Woon Kang ),( Yang Seok Kim ),( Min Kyu Shin ),( Moo Chang Hong ),( Hyun Su Rae ) 한국생화학분자생물학회 (구 한국생화학회) 2007 생화학분자생물학회 춘계학술발표논문집 Vol.2007 No.-

SW 품질 향상을 위한 테스트, 품질 전문가 자격제도

강지운(Ji-woon Kang),김지희(Ji-hee Kim),강진미(Jin-mi Kang),윤종민(Jong-min Yoon) 한국통신학회 2018 한국통신학회 학술대회논문집 Vol.2018 No.6