• Journal of The Korean Association For Science Education
• /
• v.34 no.2
• /
• pp.155-163
• /
• 2014

The present study tries to identify the characteristics of Problem Based Learning (PBL), which affects the development of middle school students' science self-efficacy. Additionally, we have tried to analyze the relationship within those characteristics to demonstrate the processes of science self-efficacy development. In line with this reasoning, we have developed a 20-module, problem-based learning science program and applied this program to 9th grade students (n=17). Two rounds of qualitative interviews have been conducted with each participant after the program, which has been analyzed with the well-documented method by Corbin and Strauss (2007). As a result, three characteristics of problem based learning have been identified to affect the development of science self-efficacy: a) authentic and ill-structured problem sets, b) small group activity, and c) result sharing. Further analysis has revealed that an authentic and ill-structured problem set as a condition precedent of self-efficacy development, while small group activity has worked as an acceleration condition. Lastly, sharing the result works as a transition condition to future interest on science-related activity or choosing science-related majors.

• Journal of Life Science
• /
• v.20 no.9
• /
• pp.1394-1401
• /
• 2010

The purpose of this study was to examine the effect of 12 wk of aerobic exercise on lipid profiles, antioxidant enzyme activities, oxidative products, and autonomic nervous activity (ANA) in children with obesity. We studied 16 children with obesity and 19 age-matched normal weight controls over a period of 12 wk, during which time moderate intense running exercise was performed. Measurements included peak oxygen uptake, body composition, blood lipid profiles, ox-LDL, 8-OHdG, SOD, GPx activities, total mRNA, and ANA. There were no differences in body weight between periods in the OW group, but body weight increased after 12 wk in OR and CO groups. There were no differences in WHR between periods in the OR and CO groups, but the WHR values decreased after 12 weeks in the OW group. In the obese group, the baseline TG was higher than in the controls (p<0.05), while the ANA level was lower. There were differences in antioxidant enzyme gene expressions between periods in all groups. In conclusion, oxidative damage and antioxidant enzyme activities in obese children were found to be similar to those of normal weight children. However, TG was higher and ANA was lower in obese children than in normal weight children. These results indicated that increased TG and decreased ANA levels begins in childhood in obese patients. Also, regular aerobic exercise may modify the antioxidant enzyme gene expression in early life.

• Journal of muscle and joint health
• /
• v.23 no.3
• /
• pp.169-178
• /
• 2016

Purpose: The purpose of this study was to evaluate effects of a cognitive improvement program on cognition, activities of daily living (ADL), depression, life satisfaction, and grasping power in small groups. Methods: A nonequivalent control group pretest-posttest design was used. Participants were 127 elders who were never diagnosed with dementia and could read (experimental: 61, control: 66). The program was consisted of 8 sessions to improve vocabulary and writing skills and fine motor skills. Each session was applied once a week for 8 weeks. A group was consisted of less than five members. Results: Cognition (t=3.82, p<.001), depression (t=-2.24, p=.027), life satisfaction (t=2.25, p=.027), and grasping power (Rt: t=2.44, p=.016, Lt: t=2.63, p=.010) except ADL (t=-0.49, p=.622) were significantly increased in the experimental group after the cognitive improvement program compared to the control group. Conclusion: This study indicates that the cognitive improvement program was effective to improve cognition, depression, life satisfaction and grasping power. Further study is needed in order to identify continuous effects of this cognitive improvement program.

• Proceedings of the Technology Innovation Conference
• /
• 2002.02a
• /
• pp.237-268
• /
• 2002

실리콘밸리는 보이지 않는 인적 네트워크(Human Network)로 움직인다. 실리콘밸리내 핵심정보와 세상 돌아가는 진짜 이야기는 인종별, 대학출신별, 출신기업별 소그룹 네트워크를 통해서만 이루어진다. 본 연구에서는 실리콘밸리라고 하는 창조적 공간과의 연결고리 강화를 통해 미래기회를 선점하기 위한 수단으로서 $\ulcorner$한국계 벤처 네트워크$\lrcorner$ 를 촉진하는 방안에 대해 살펴보고자 한다. 본 연구에서는 중국, 인도, 이스라엘 등 각 민족별 네트워크가 본국과 실리콘밸리간에 어떠한 협력관계를 보이고 있는가를 조사.분석한 후, 여러가지 가설을 도출하였다. 본 연구의 주요 결과는 다음과 같다. 첫째, 각 민족별 역사적 이민과정 및 배경에 따라 네트워크의 특성이 달라진다. 둘째, 본국의 산업발전 정도에 따라 본국과 실리콘밸리내 네트워크간의 관계가 달라진다. 셋째, 본국의 정책적 의지가 얼마나 강하냐에 따라 네트워크 활동의 강도도 달라진다. 넷째, 연구모형 인자간의 흐름방향에 따라 본국과 실리콘밸리 간의 역할 관계가 다르게 나타난다. 아울러 본 연구에서는 각 민족별 네트워크의 특성을 비교 분석한 후, 한국계 벤처 네트워크의 모델도 함께 제시하였다. 끝으로 본 연구의 관찰 및 분석을 바탕으로, 한국계 Global Network 발전방안에 대한 정책적인 제안을 제시하였다.

• The Journal of the Korea Contents Association
• /
• v.21 no.4
• /
• pp.14-25
• /
• 2021

The purpose of this study is to explore what are the interactive factors of synchronous online education in university and identify the level of interaction. This study used mixed research method. As a result of the interaction level, it was recognized that face-to-face education could be more interactive than synchronous online education. Synchronous online education could have better interactive between instructor and learner, and among learners than asynchronous online education. Factors which influencing the interaction were as follows: small group activities and scaffolding, diversification of communication channels and integration of learner's question in learning content. Detrimental elements were distance felt between instructor and learners, low intimacy among learners, content-focused lecture, restrictions on non-verbal communication, unstable systems and misusing microphones. The necessary factors to promote interaction are planning interactive class activities, etc. Based on the results, it was to suggest what kinds of efforts are needed to make interaction more effective in terms of teaching and learning method & activity, tool & system, and environment.

• The Journal of Korean Association of Computer Education
• /
• v.23 no.3
• /
• pp.9-15
• /
• 2020

This study analyzed high school informatics textbooks that were developed based on the 2015 Revised National Curriculum. Content analysis was adopted to analyze the organization system of the textbooks. Learning objectives were also analyzed according to Anderson's taxonomy of educational objectives. Through content analysis, it was revealed that the textbooks were composed of activities, differentiated learning, and small group learning to promote core competencies. The analysis of learning objectives of the textbooks showed that 'understanding' (41%), 'developing' (20%), and 'applying' (18%) were the three highest criteria in terms of cognitive processes; in terms of type of knowledge, conceptual knowledge accounts for the highest(45%), followed by procedural (32%), and factual (12%). Further methods to improve the textbook quality is proposed based on the results from this analysis.

• Journal of Engineering Education Research
• /
• v.22 no.5
• /
• pp.29-36
• /
• 2019

Here we analyze a case of redesigned course named "Prospect of Nuclear Engineering" as an example of student-entered education which came to the fore of university education innovation. This course was reformed from lecture-based to student-centered class by changing the context as follows: Stimulating students by addressing various problems or episodes behind scientific and mathematical concepts in the history; Offering experimental project to perceive the importance of differential equations; Exploring the research status and issues of nuclear engineering and the ways of attacking them by discipline; Discussing the public acceptance of nuclear power plants. Small group activities using 'small group discussion' and 'peer-learning' have been applied in this course to enhance students' critical and creative ability. In the survey, students rated highly in the fact that they could actively interact with the peers and that they could think for themselves through 'small group discussion' and 'peer-learning' which is not just the way of conveying knowledge.

• The Journal of the Korea Contents Association
• /
• v.20 no.11
• /
• pp.511-524
• /
• 2020

Purpose: This study aims to examine the effect of increased physical activity (PA) regarding health-related quality of life (QOL) and nutrition intake in hemodialysis patients. Methods: The research was quasi-experimental using pre-test and posttest design. The participants were 60 patients, 30 each in the experimental and control group. The program was up to eight weeks long and involved two kinds of aerobic exercises: intradialytic aerobic exercise to be performed thrice a week and walking for up to seven days a week. The 60 patients undergoing hemodialysis for end-stage renal disease underwent assessment of International Physical Activity Questionnaires (IPAQ), 24-hour diet recall and a 12-item short-form health survey (SF-12; physical component summary score(PCS) and mental component summary score(MCS)) before and after the exercise program. Nutrition intake was assessed using CAN-2.0. Data were analyzed using descriptive statistics, independent t-test, 𝑥2 test, and Mann-Whitney U test. Results: In the experimental group, PA post-test scores were also significantly higher than the pre-test scores and the levels of physical component summary score (PCS) in QOL were significantly improved post-test, but the scores on nutrient intake did not improve. The levels of PCS were significant correlations animal protein, manganese, selenium, and Vitamin C. Although there was no group effect, total calorie of nutrition intake was higher than the comparison group. Conclusion: Combined intradialytic exercise and walking was found to be effective on PA, and PCS in QOL. Therefore, the findings of the current study may provide an appropriate guidance for encouraging exercise by hemodialysis patient.

• Journal of Nutrition and Health
• /
• v.55 no.3
• /
• pp.359-375
• /
• 2022

Purpose: Adult Korean men belonging to the main economically active population are known to have long sedentary hours. This study was undertaken to determine the difference and relevance of sedentary hours on the nutrition, diet, and health status of adult men, and to suggest how to prevent health risk factors. Methods: Subjects (n = 1,068) were classified into 4 groups based on their sedentary hours, ranging from the first quartile (Q1) having the least hours spent sitting, to the fourth quartile (Q4) spending the longest hours. Results: Subjects belonging to Q4 had the lowest average age, the largest waist circumference, and the highest level of education. Among those engaged in economic activities, the ratio of white-collar workers was significantly higher in Q4. Accordingly, the rate of not doing high-intensity or moderate-intensity physical activity while working was also the highest in Q4. A significant difference was obtained in the drinking frequency between groups, but this was found to be associated with the average working hours rather than sedentary hours. The proportion of not doing aerobic exercise was higher with longer sitting hours. The highest diagnosis of diabetes (8.8%) was obtained in the Q4 group. Among the factors related to cardiovascular disease, only low density lipoprotein-cholesterol showed a significant difference, with Q4 being significantly higher than Q1. Considering energy and nutrient intake, vitamin B₁ and calcium intake were the lowest in the group with the longest sitting hours, as well as the least consumption of vitamin C than the recommended estimated average requirement. Conclusion: The results of this study suggest that the health and nutritional status of Korean adult men are affected by sedentary hours. This should be recognized as a health risk factor and guidelines need to be developed for sedentary lifestyle management.

• Journal of the Korea Convergence Society
• /
• v.10 no.6
• /
• pp.299-308
• /
• 2019

This quasi-experimental study was conducted to develop and implement a team facilitation program as well as to evaluate the effects of the program on Problem Based Learning (PBL) and how these influence on team dynamics. Data were collected in a convenient sample of 126 nursing students (intervention group=69; control group=57). Data were analyzed using ${\chi}^2$ test, T-test, and ANCOVA. SPSS23 was used. The intervention group received the PBL team facilitation program, whereas the control group received a human interaction training. The intervention group than the control group demonstrated significantly higher scores in a team dynamic among team members(F=10.35,p<0.01), trust among team members(F=9.86,p<0.01), communication(F=5.69,p<0.05), learning behavior of a team(F=4.57,p<0.05), and individual capability evaluation(F=5.12,p<0.05). Team performance was not significantly different between groups. This study reveals that the team facilitation program is an effective strategy to maximize the effects of PBL. We propose the need for educational strategy to support team function.