• 한국생활과학회지
• /
• 제21권4호
• /
• pp.791-803
• /
• 2012

This study intends to identify applicability of natural dye extracted from Aplysia kurodai, aiming to standardization of Aplysia kurodai natural dyeing through scientific validation by analyzing characteristics of pigment elements to review dyeability, colorfastness and antibacterial activity. Such material as silk fabrics that is animal fiber were used for this purpose, and derived following summarized results. UV/VIS spectrum analysis on the pigment of Aplysia kurodai that was extracted from purple gland showed that maximum absorbtion was near 540 nm. The silk fabric optimal dyeing can be achieved at a temperature of $55^{\circ}C$ with a colorant concentration of 5%. Dyed at $55^{\circ}C$ with interval of 10~90 minutes for identifying dye uptake over time to observed slow increase of dye uptake over time, and equilibrium occurred at 50 minutes. For dye uptake according to pH, while dye uptake was superior in acidity, it decreased rapidly in a base after pH 7. For color changes according to pH variation, it was reddish purple in acidity and was purplish red in a base. For color changes according to mordanting method, more clear color change had been obtained when process with aluminium pre-mordanting than non-mordanting and post-mordanting. The colorfastness to light, perspiration and washing was 1, 4~5, and 3~4 ratings respectively. The silk fabric dyed with Aplysia kurodai demonstrated excellent antimicrobial activity to Staphylococcus aureus and Klebsiella pneumoniae. The Aplysia kurodai can be used as a new colorant for the natural dyeing of silk.

• 공학교육연구
• /
• 제23권5호
• /
• pp.68-75
• /
• 2020

In order to cultivate the talents acquired in the fourth industrial revolution, developed countries' government are actively engaged in the campaigns encouraging K-12 students to participate in the maker movement. Maker education is regarded as one possible solution based on high tech in the era of the 4th Industrial Revolution, and it is spreading widely along with STEM education. In South Korea, STEAM education was actively conducted nationwide, and since 2017, STEAM and maker education have been linked showing mutual development. However, compared to STEAM education linked to the curriculum, comparison and activity-based research on maker education for teenagers is still insufficient. Therefore, this study aimed to suggest implications for STEAM education and maker education by analyzing the motivation of Korean youth to participate in maker activities. The subjects of this study are high school students who participated in maker education programs in student community for the first time in Korea. In this study, students were classified into engineering-related career group and non-engineering-related career groups based on their career intentions, and the motivation and understanding of participation in maker activities were compared. As a result of the study, male students participated more in maker education community activities than female students, and the engineering-related career group had a higher intention to participate in games, outdoor activities, IT equipment, digital production, and electrical/electronic production activities than the non-engineering-related career group. In addition, in the fields of handicraft/art, home baking, installing, and horticultural agriculture, there was no difference in the intention of participate in the engineering-related career group and the non-engineering-related career group. It was found that the engineering-related career group believed that there was a strong relationship between the maker education community activity, career exploration and future career choice, while the non-engineering-related career group believed that the relationship is less strong. It was also found that the engineering-related career group was participating more actively in the maker activity than the other group.

• 패션비즈니스
• /
• 제12권3호
• /
• pp.87-98
• /
• 2008

The purposes of this study are to measure physiological reactions of human body according to the scalp treatment, a popularized service in beauty care industry and propose efficient ways of scalp treatment. To meet the goals, total 30 applicants without any medical history(5 males and 5 females in 20's, 30's and 40's respectively) were informed on the purpose of experiment hereof and were investigated and received a 30-minute scalp treatment, which combines standardized scalp treatment massage technique proposed by KAT and ITF with another massage technique operated in the beauty salon run by the author of this paper. 5ml of blood samples were taken from each subject before and after the scalp treatment respectively and the blood sample was divided into 3 different tubes for analysis: 1) 2 ml for blood cell analysis, 2) 2ml for enzyme activity measurement, 3) 1ml for hormone level reading. In order to determine effects of scalp treatment on ALP, GOT, GPT, ${\gamma}-GTP$, WBC, RBC, Hb, Hct, Platelet, MCV, MCH and MCHC, all collected data were used for measuring respective levels of these blood substances by means of enzyme reaction measurement, enzyme activity measurement and automated hematology analyzer. Then, all measured data were analyzed through paired t-test using SPSS WIN 11.5. As a result, the scalp treatment is associated with improving hepatic function, facilitating blood circulation and helping blood coagulation and hemostasis in a effective way. Therefore, it would be necessary to conduct further studies on this subject related to anemia in the future.

• 예술인문사회 융합 멀티미디어 논문지
• /
• 제9권5호
• /
• pp.259-271
• /
• 2019

본 연구는 우리나라 교육상황에서 플립드 학습의 잠재력을 시험해 볼 필요성이 있고 특히 이와 가장 잘 접목될 것으로 생각되는 지방대학의 대학 일반영어 교육을 통해서 그 가능성을 탐색하고자 하는 것이다. 지방 중소도시에 소재한 C대학교에서 2017년 2학기에 개설된 영어과 일반영어 수업인 미디어 영어 수업을 대상으로 하여 플립드 수업 방식을 적용하고 그 과정에서 생성되는 질적·양적 자료를 수집하고 분석하여 탐색적 방법으로 대학 일반영어 수업의 개선책을 마련하고자 하는 탐색적 사례연구이다. 효과의 측정을 위한 실험연구가 아니기 때문에 비교반 없이 실험반 한 클라스를 중심으로 연구가 이루어지고 강의평가와 건의문, 중간과 기말고사, 조별 수행평가, 온라인 수업시청률과 학습참여횟수 등과 같은 연구도구에서 나온 자료를 분석하였다. 결과는 중간고사보다는 기말고사의 성적이 유의하게 높았고, 조별 수행평가 점수도 갈수록 나아졌다. 온라인 수업참여율은 수준별로 상집단이 가장 높고, 중집단이 뒤를 잇고 하집단이 그 뒤를 이었다. 그러나 중/하 집단의 경우 플립러닝의 자기주도적 수업 참여율이 높은 경우에는 영어에 많은 향상이 있었다.

• 공학교육연구
• /
• 제24권1호
• /
• pp.24-33
• /
• 2021

As online learning continues to be extended, many engineering colleges are engaged in online learning activities. One of the core competencies required of engineering students in a knowledge-convergence society is communication skills. Online discussion activities are frequently used in educational field to improve communication skills. Efforts are being made to provide visual dashboards in online discussion activity systems to more effectively support online discussion activities. However there is less qualitative studies on students' experience in discussion activities. The purpose of this study is to explore the experience of engineering students participating in discussion activities using online discussion systems and visual dashboards. We interviewed 15 students who participated in online discussion activities to achieve their research objectives about their experience in utilizing the online discussion system, their perception of visual dashboards, and their experience in discussion activities. As a result of the study, students' perception of the use of the online discussion activity system, the visual dashboard, and the perception of a sense of social presence were understood. To be more effective in providing tool support, such as discussion activity systems and visual dashboards in online discussion activities, instructors need to understand the nature of learners' online discussion activities.

• International Journal of Computer Science & Network Security
• /
• 제22권9호
• /
• pp.7-14
• /
• 2022

COVID-19 has caused a global disturbance, increased anxiety, and panic, eliciting diverse reactions. While its cure has not been discovered, new infection cases and fatalities are being recorded daily. The focus of the present study was to analyze the reaction of gifted undergraduate students on social media during the quarantine period of the COVID-19. A special group of gifted students, who joined the program of attracting and nurturing talents at the University of Jeddah, University students as were the target sample of this study. To analyze online reactions during the pandemic; the choice of university students was arrived at as they are perceived to be gifted academically. Hence, the analysis of the impacts on their behavior on social media use is imperative. This study presented accurate and consistent data on the effects of social media using Twitter platforms on gifted students during the quarantine occasioned by the COVID-19 pandemic. The behavior of learners due to during the use of social media was extensively explored and results analyzed. The study was carried out between April and May 2020 (quarantine period in Saudi Arabia) to establish whether the online behavior of gifted students reflects positive or negative feelings. The methods used in conducting this study the research were online interviews and scraping participants' Twitter accounts (where most of the online activities and studies take place). The study employed the Activity theory to analyze the behavior of gifted students on social media. The sample size used was 60 students, and the analysis of their behavior was based on Activity theory Overall, the results showed proactive, positive behavior for coping with a challenging situation, educating society, and entertaining. Finally, this study recommends investing in gifted students due to their valuable problem-solving skills that can help handle global pandemics efficiently.

• 한국엔터테인먼트산업학회논문지
• /
• 제15권8호
• /
• pp.443-456
• /
• 2021

본 연구는 서울시 소재 청소년들을 대상으로 음악 예술교육이 코로나-19, 사회적 거리두기로 인해 발생된 우울증 및 스트레스 해소에 어느 정도 영향이 있는지를 도출하기 위하여 진행되었다. 이를 위해 서울시 교육청의 협조하에 서울시 소재 초·중·고등학교에 공문을 시행하여 약 1,745여명의 학생들을 대상으로 현황 연구를 실시하였다. 주지하다시피 코로나-19가 지속됨에 따라 특히 청소년들의 우울증과 스트레스가 점점 높아지고 있는 추세이다. 이는 무엇보다 감염의 차단을 위한 대외 활동의 제한이 큰 비중을 차지한다. 그런 이유로 청소년들의 정서의 안정과 자존감 형성을 도모하기 위해서 문화예술교육이 반드시 필요하다. 이에 있어 무엇보다 장르의 특성상 음악 예술교육은 청소년들의 우울증 및 스트레스 해소에 상당히 기여할 수 있음을 본 연구를 통해서 확인할 수 있었다.

• The Korean Journal of Physiology and Pharmacology
• /
• 제28권4호
• /
• pp.295-302
• /
• 2024

Walking can have a positive impact on cognitive function in adolescents. This study aimed to compare the effects of walking with sneakers and barefoot on cognitive ability in adolescents. Fifty-nine adolescent male students were included in the study and assigned to the control (n = 20), sneaker (n = 19), and barefoot (n = 20) groups. The barefoot and sneakers group performed a 40-min walking exercise four times a week for 12 weeks during the morning physical activity time, while the control group performed self-study. Electroencephalogram (EEG) and brain activity variables were measured before and after the exercise program. The results showed that after 12 weeks, the barefoot group had a significant decrease in Gamma and H-beta waves and a significant increase in sensorimotor rhythm (SMR) and Alpha waves. Conversely, the control group showed a significant decrease in SMR waves and increase in Theta waves. The sneaker group showed a significant decrease in SMR waves alone. In an eyes-open resting state, the barefoot group showed a significant increase in H-beta, M-beta, SMR, and Alpha waves. The barefoot group also had a significant increase in cognitive speed and concentration and a significant decrease in brain stress. Taken together, barefoot walking can effectively enhance cognitive ability in adolescents, as demonstrated by the significant variation in EEG activity. This research highlights the potential benefits of barefoot walking as a simple and effective form of exercise for enhancing cognitive function in adolescents.

• 복식
• /
• 제66권6호
• /
• pp.1-16
• /
• 2016

This study identifies the impact of celebrity stylists' individual psychographic characteristics, including their lifestyle, and social characteristics, including person-environment fit on their job commitment and satisfaction. A survey was conducted with currently working celebrity stylists, and a total of 203 responses were analyzed using descriptive analysis, factor analysis, reliability test, and multiple regression analysis. The results of this study were as follows: 1) The results of the factor analysis and reliability test on celebrity stylists' lifestyle and person-environment fit clearly revealed factorial structures, respectively. 2) Regarding the results of the influences of celebrity stylists' lifestyle on their job commitment and satisfaction, respondents who had higher new information-oriented, success-oriented, and conservation-oriented, but lower outdoor activity-oriented lifestyle tended to show higher job commitment and role satisfaction of job satisfaction. 3) Respondents who had higher person-job fit, person-organization fit, person-celebrity fit, and person-coworker fit tended to demonstrate a higher level of job commitment and role satisfaction of job satisfaction. Both celebrity stylists' lifestyle and person-environment, which revealed to have a significant relationship to their job commitment and satisfaction, could be used as an index to evaluate potential employees' job attitudes for recruiting celebrity stylist.

• 한국산업보건학회지
• /
• 제24권2호
• /
• pp.208-218
• /
• 2014

Objectives: The major objective of this study was to develop and validate a tier 1 exposure model utilizing worker exposure monitoring data and characteristics of worker activities routinely performed at construction sites, in order to estimate worker exposures without sampling. Methods: The Registration, Evaluation, Authorization and Restriction of Chemicals(REACH) system of the European Union(EU) allows the usage of exposure models for anticipating chemical exposure of manufacturing workers and consumers. Several exposure models have been developed such as Advanced REACH Tools(ART). The ART model is based on structured subjective assessment model. Using the same framework, a tier 1 exposure model has been developed. Worker activities at construction sites have been analyzed and modifying factors have been assigned for each activity. Korean Occupational Safety and Health Agency(KOSHA) accrued work exposure monitoring data for the last 10 years, which were retrieved and converted into exposure scores. A separate set of sampling data were collected to validate the developed exposure model. These algorithm have been realized on Excel spreadsheet for convenience and easy access. Results: The correlation coefficient of the developed model between exposure scores and monitoring data was 0.36, which is smaller than those of EU models(0.6~0.7). One of the main reasons explaining the discrepancy is poor description on worker activities in KOSHA database. Conclusions: The developed tier 1 exposure model can help industrial hygienists judge whether or not air sampling is required or not.