• Applied Chemistry for Engineering
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• v.34 no.3
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• pp.285-290
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• 2023

Poly-lactic acid (PLA) is the most promising polymer in additive manufacturing as an alternative to acrylonitrile butadiene styrene (ABS). Since it is produced from renewable resources such as corn starch and sugar beets, it is also biocompatible and biodegradable. However, PLA has a couple of issues that limit its use. First, it has a comparatively low glass transition temperature of around 60 ℃, such that it exhibits low thermal resistance. Second, PLA has low impact strength because it is brittle. Due to these problems, scientists have found methods to improve the crystallinity and ductility of PLA. Polyethylene glycol (PEG) is one of the most studied plasticizers for PLA to give it chain mobility. However, the blend of PLA and PEG becomes unstable, and phase separation occurs even at room temperature as PEG is self-crystallized. Thus, it is necessary to investigate the optimal mixing ratio of PLA-PEG at the molecular scale. In this study, molecular dynamics will be conducted with various ratios of L-type PLA (PLLA) or DL-type PLA-PEG (PDLA-PEG) systems by using BIOVIA Materials Studio.

• Journal of Food Hygiene and Safety
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• v.15 no.4
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• pp.304-314
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• 2000

Following the recent policy, enlargement of foodservice and contracted management systems of high school foodservices have been accelerated, and the scales of foodservices have been gradually increased. A sudden growth of domestic foodservice companies have remarkably disparated. Yet compared to that of the foodseuice control in advanced countries, domestic foodservice control has a lot more to learn. Due to the characteristics of foodservice establishment serving many people at a time, there is always a high potential of food bone outbreak. The purpose of this study was to evluate hazard factors in the steps of production, holding and assembly and service of fried curry hair-tail, cold seaweed and cucumber, fried pork cutlet, that were served by contracted management in high school foodservice centre, then to suggest method of control with the Hazard Analysis Critical Control Point(HACCP) program. Also we suggested the possibility that the contracted management of foodservice system can be established and utilized to identify the variation of holding temperature among floods up to 6 hours after cooking. The results are as follows; The hazard factors in food product had come from the temperature, time, pH, Aw, equipment and utensils. The critical control point(CCP) of each food product; curry hair-tail, cold seaweed and cucumber and pork cutlet was cooked and held before serving, prepared and held before serving, cooked and held before serving, and prepared, cooked and held before serving, respectively.

• Journal of Digital Convergence
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• v.6 no.3
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• pp.93-107
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• 2008

The aim of this study was to draw some suggestions for Internet Policy by using empirical analyses of key factors in Internet addiction in youths. Internet addiction in youths is perceived as a current and significant issue throughout the world. For the purpose of this study, factors that have influence on the Internet addiction of the youth have been explored and analysed empirically of its hypothetical relationships by using the SEM(structural equation modelling). As a result, a few key factors that suggest a strong relationship to Internet addiction in youths have been drawn: subjects' personality, accessibility to the Internet, psychology and communication factor. Particularly accessibility to the Internet, and specifically the duration of time spent online causes the phenomenon of the Internet addiction. This study shows, however, the subjects' personality and communication factor have the most significant causal relationship to Internet addiction. In other word, the Internet addiction has been changing with the various factors including the factors drawn in this study, which are subjects' personality, accessibility to the Internet, psychology and communication factor. Therefore, Internet addiction should not be merely treated as the isolated problem of the Internet itself; rather it should be understood as various dimensions of society, economy, culture etc. Furthermore, some alternatives to deal with the Internet addiction should be found in various approaches.

• Journal of the Korean Institute of Educational Facilities
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• v.3 no.3
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• pp.41-57
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• 1996

본 연구는 광희중학교 학구내에서 재개발로 인하여 증가되는 인구수을 예측하여 장래 중학교 학생수를 예측하였다. 2016까지 학급당 학생수를 37명으로 하고 36학급 규모의 학교를 추구한다면 중학교는 적어도 1개 더 건축하여야만 재개발로 늘어나는 제1학군의 학생수를 수용할 수있을 것음을 분석하였다. 또, 교과과정을 분석한 결과 도덕 2.5교실, 국어 6교실, 사회 5교실, 수학 5교실, 과학 5교실, 체육 4교실, 음악 2교실, 미술 2교실, 가정 1.5교실, 기술 3교실, 영어 5.5교실, 한문 1교실, 컴퓨터 1교실로 분석되어 이용율이 88%가 되었다. 본 연구는 광희중학교 구체적 건축계획에 앞서 계획의 모델을 설정하여 이를 토대로 계획에 임하였다. 광희중학교 주변의 접근성, 교통 조건, 소음 상태, 지역사회인의 이용, 전망 등의 환경 분석을 토대로 4개의 죠닝(Zonning)안을 제시하여 평가한 후 가장 바람직한 안을 선정하였다. 이를 토대로 브록(Block)프랜을 5개 작성하여 평가후 1개 안을 채택하여 구체적 평면 계획안을 작성하였다. 36학급 37명 학생수를 기준으로 교과교실형으로 계획하였으며 특별 교실형의 학습도 가능하게 계획하였다. 교수, 학습의 복합화에 대처하여 칸막이를 이동 가능한 형태로 계획하였으며, 일반 교과도 컴퓨터를 이용한 수업이 가능하게 정보 코너를 설치하였다. 지역사회인에게 열린 교실이 되게 계획하였고 개별 학습이 가능한 구조로 계획하교 기자재의 선진화를 대비한 학습 환경의 제고도 고려하였다. 본 연구의 입면 형상은 주변 건물과 조화되게 수평적 요소가 강조되는 형상이 되도록 계획하며 고층의 아파트의 위협을 상쇄시키기 위하여 지붕이 있는 구조로 계획하여 지역사회에서 중심임을 강조하도록 계획하였다.

• Journal of Digital Convergence
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• v.20 no.1
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• pp.481-488
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• 2022

This study was conducted on 130 nursing college students who had experience taking simulation learning to confirm the relationship between simulation learning and nursing competency. Participant's satisfaction and confidence were positively associated with overall nursing competency and patient safety. The teaching method and design of the facilitator were also positively correlated with overall nursing competency, and participants' age and simulation design was a predictive factor explaining 21.5% of the nursing competency. In applying simulation to develop nursing competency, it is necessary to consider the satisfaction and confidence of participants and to systematically diversify the teaching method and design.

• 한국벤처창업학회:학술대회논문집
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• 2021.04a
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• pp.75-78
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• 2021

최근 대학을 둘러싼 외부 환경은 학령인구 감소로 인한 대학 입학자원 감소, 4차 산업혁명 도래에 따른 청년 일자리 감소 등의 급진적인 변화가 나타나고 있으며 이에 따라 내부 역량 강화 및 고도화, 대외 경쟁력 강화 및 사회적 역할 변화 등 체계적인 대응이 요구되고 있는 상황이다. 향후 학령인구 감소가 본격화될 것으로 예상되는 가운데 국내 대다수의 대학 특히 지방 대학의 경우 학령 인구 감소로 인해 나타날 다양한 변화에 대한 대책 마련이 절실히 요구되는 있다. 지방대학의 위상 약화로 지방대 졸업생의 취업의 질이 낮아지고, 우수 학생의 지방대학 기피로 이어지는 구조적 문제 발생하고 있으며, 이러한 지역 대학의 위기는 특정한 지역의 일부 대학만의 문제가 아닌 현재 우리 사회 전체가 직면하고 있는 구조적이고 복합적 원인에 기인하여 악순환의 고리를 형성하고 있다. 이에 본 연구에서는 지역 혁신을 위한 대학 역할 및 활성화 방안 도출 및 지역 혁신에 기여하는 대학의 국내외 우수사례 분석 지역을 중심으로 한 창업 생태계 현황 및 구성 체계, 창업선도대학, 캠퍼스 타운사업 등 대학을 중심으로 한 지역기반 창업 생태계 선도 모델 분석을 통해 지역사회와 상생하는 대학 중심 지역 창업생태계 구축을 위한 창업기반 지역 혁신형 대학 모델 발굴 및 제언하고자 한다.

• School Mathematics
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• v.10 no.1
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• pp.23-42
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• 2008

The purpose of this study was to describe characteristics of thinking in elementary gifted students' solutions to algebraic tasks. Especially, this paper was focused on the students' strategies to develop generalization while problem solving, the justifications on the generalization and metacognitive thinking emerged in stildents' problem solving process. To find these issues, a case study was conducted. The subjects of this study were four 6th graders in elementary school-they were all receiving education for the gifted in an academy for the gifted attached to a university. Major findings of this study are as follows: First, during the process of the task solving, the students varied in their use of generalization strategies and utilized more than one generalization strategy, and the students also moved from one strategy toward other strategies, trying to reach generalization. In addition, there are some differences of appling the same type of strategy between students. In a case of reaching a generalization, students were asked to justify their generalization. Students' justification types were different in level. However, there were some potential abilities that lead to higher level although students' justification level was in empirical step. Second, the students utilized their various knowledges to solve the challengeable and difficult tasks. Some knowledges helped students, on the contrary some knowledges made students struggled. Specially, metacognitive knowledges of task were noticeably. Metacognitive skills; 'monitoring', 'evaluating', 'control' were emerged at any time. These metacognitive skills played a key role in their task solving process, led to students justify their generalization, made students keep their task solving process by changing and adjusting their strategies.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.5
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• pp.3139-3147
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• 2015

The aim of this study was to investigate the condition surrounding attempted suicide and related factors among middle and high school students in Korea. Methods : Data from 72,435 participants of 2013 Korea Youth Risk Behavior Web-based Based Survey were analyzed. Statistical analyses were conducted on weighted data using SPSS 21 software to account for the complex sampling designs. Results : Complex samples logistic regression analysis, school level, socioeconomic status, drinking alcohol, drug use, experience of school bullying were associated with an increased proportion of attempted suicide for boys and girls. Particularly, male students was associated with living type. Conclusion : The results of this study highlight the important of developing a program that focuses on enhancing suicidal prevention & respect life program with life skills program, to effectively reduce the likelihood of attempted suicide among adolescents in Korea.

• Journal of Digital Convergence
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• v.17 no.9
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• pp.439-450
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• 2019

The purpose of the study was to critically explore the academic identity of dance education as a paradigm of practice-based education. Dance education is recognized as a school dance since the first curriculum was designed, which was announced by the Ministry of Education in 1955. Although Korea's dance education has 65 years of history, its academic identity as a dance education is not very strong. Traditional dance education was teacher-centered, skills-oriented, and exercise-oriented by following the practice-based paradigm. Recently, an initiative was taken to establish a new paradigm for dance education in schools, communities, and professional fields. This study followed the keyword network analysis and reviewed the main contents of each section of dance education research from a time-series perspective. The first section (1968-1979) is a practice of dance education based on physical education; the second section (1980-1989) is a creative-based movement education for primary education; the third section (1990-1999) is a systematization of dance education courses by class; the fourth section (2000-2009) is a paradigm for cultural and artistic education; the fifth section (2010-2019) consisted of various educational practices and institutions. Based on the research results, efforts are requested to establish an academic identity that can support dance education, interdisciplinary practice, and research.

• Journal of Digital Convergence
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• v.12 no.5
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• pp.25-37
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• 2014

This study aims to localize the national policies of SMART education for regional educational development in Jeollanamdo province. To achieve the goal, this study analyzed the current status of ICT use in education in the province through a survey, interviews, and the existing relevant policies in national and international levels. The suggested policies were validated by experts from the field of education. As a result, 20 tasks in educational policies of 4 domains were suggested for the Jeollanamdo SMART education. Among them, the development of SMART educational models, building a professional development of teachers for successful implementation, and the development of online performance support system were prioritized for successful educational innovation for Jeollanamdo.