• 한국생활과학회지
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• 제22권6호
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• pp.571-586
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• 2013

The purpose of this study was to examine educational meanings of snack and lunch time of 4-year-old children and their teachers in a kindergarten class. The study was done in the Class of 4-year-old children in S Kindergarten located in Songpa-gu, Seoul. And 30 children of this class, Teacher A who is the teacher in charge of the Class, and Teacher B who is the researcher and teacher in charge of it participated in it. The study was carried out by the ethnography method and data collection was done through participation observation, interviews, video and voice recording, and data collection of photography shooting. The results are as follow: First, the children had private conversations, shared their cultures, deepened and expanded their existing concepts, expressed their emotions and relieved their tension, and strengthened relations with friends during the snack and lunch time. Second, the teachers promoted conversation and communication, gave the opportunity that the children can set the lunch table by themselves and tried to make the snack and lunch time with the children by discussing what they are how they are operated with them together. In conclusion, the snack and lunch time can be more meaningful time for children when there are proper educational plans and support of teachers which are considered children's viewpoints.

• 창의정보문화연구
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• 제6권3호
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• pp.169-177
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• 2020

본 연구에서는 초등학교에서 시행되는 온라인 수업 운영 방법 중 '콘텐츠 활용 및 과제수행 수업 운영 방법'과 '실시간 쌍방향 수업 운영 방법'에 대한 수업만족도를 비교 분석하였다. 연구자는 '콘텐츠 활용 및 과제수행 수업 운영 방법'과 '실시간 쌍방향 수업 운영 방법'의 수업만족도를 비교·분석하기 위해 실험연구를 진행하였으며, 연구 집단은 경기도 화성시의 D 초등학생 98명을 선정하였다. 학생들을 대상으로 '콘텐츠 활용 및 과제수행 수업' 과 '실시간 쌍방향 수업'을 각각 진행하였으며, 각각의 수업 운영 방법에 따른 학생들의 수업만족도를 분석하였다. 분석결과 '실시간 쌍방향 수업 운영 방법'에 대한 수업만족도가 높게 나왔으며, 학생의 특성에 따른 만족도를 분석한 결과 과제수행을 잘 못 하는 학생과 수업에 집중을 잘하지 못하는 학생의 경우 '콘텐츠 활용 및 과제수행 수업 운영 방법'의 만족도가 더 높게 나왔다. 이를 통해 '콘텐츠 활용 및 과제수행 수업 운영 방법'과 '실시간 쌍방향 수업 운영 방법' 간의 장단점이 있으며, 학생의 실태를 명확히 조사하여 수업을 진행함으로써 맞춤형 온라인 수업이 될 수 있도록 제언한다.

• 대한지역사회영양학회지
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• 제11권2호
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• pp.161-171
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• 2006

This study was carried out to investigate the dietary attitudes and nutritional status of preschool children in different income levels in Busan. The survey was conducted from November 1 to November 30, 2004 by questionnaires mid data analyzed by the SPSS program. The results are summarized as follows: The Kaup index of the upper income class group was higher than that of the other income classes. In the middle income class group, nutrition knowledge scores were higher than in any other income class. Sixty-four point nine percent of the upper income class children, 25.7% of the middle income class children and 15.7% of the low income class children had nutrition education experiences. Intake of protein was higher than that of the Korean recommended dietary allowances (RDAs) for children. In the upper income class group, intake of calcium was higher than in any other income class. Intakes of calcium and iron were lower than those of the RDAs in all children. Dietary attitude had positive correlation with frequency of breakfast, time for outdoor activity, and height and weight, and had negative correlation with frequency of fast food and time for watching television. Frequency of snack had positive correlation with frequency of fast food and time for watching television, but frequency of breakfast had negative correlation with those. These results indicate that nutrition education programs linking parents to children should be carried out to improve their nutritional status.

• Management Science and Financial Engineering
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• 제17권2호
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• pp.23-37
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• 2011

In this paper, we address a layout design problem for determining an optimal 4-class-based dedicated linear storage layout in a class of unit load storage systems. Assuming that space requirement for a class is the sum of the maximum inventory levels of products assigned to the class, and that one-way travel time is a linear function of storage index, we formulate a 4-class-based dedicated linear storage problem PTL[4] and provide an exact splitting algorithm with $O(n{\lceil}logn{\rceil})$. Our algorithms could be applied to more than a 4-class-based dedicated storage layout problem with slight modification in order to reduce computational execution time.

• 한국식품영양학회지
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• 제10권2호
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• pp.201-207
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• 1997

경기 북부 지역의 3개 전문대학에서 주, 약간별 학생들의 학교식당 이용실태를 조사하였다. 학교식당의 이용율에서 거의 매일 이용하는 주간 학생은 64.29%였고, 야간 학생들은 44.35%로 주간 학생의 이용이 더 많았다. 학교식당을 이용하는 이유로는 '달리 먹을 만한 장소가 없어서'가 주, 야간 각각 49.38, 68.01%로 나타났고, 다음으로는 '가격이 저렴해서', '시간이 절약되므로'의 순으로 나타났다. 학교식당을 이용하지 않는 이유로는 주간의 경우 52.09%, 야간의 경우 31.99%가 '맛이 없어서' 이용하지 않는 것으로 나타났고, 학교식당을 이용하지 않는 경우 주간의 경우 68.63%, 야간의 경우 37.37%가 학교 밖에서 매식하는 것으로 나타났다. 평균적인 식사의 형태는 밥식>라면, 국수류>과자류>빵류의 순이었다. 학교식당의 음식에 대한 만족도는 음식의 양을 제외하고는 맛, 기호, 반찬수 등에서 만족도가 낮은 것으로 나타났다. 학교식당의 개선점으로는 '음식의 맛과 질이 향상되어야 한다'는 점에 가장 많이 응답했고, 그 다음으로 '메뉴가 다양해야 한다', '가격이 저렴해야 한다', '위생적이어야 한다'의 순으로 나타났다.

• 한국운동역학회지
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• 제24권3호
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• pp.209-216
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• 2014

The purpose of this study was to explore the effect of 8 weeks after school classes of track sports on students' start motion through kinematic variables. 30 students in D National university of education participated for this study. These students divided into two groups, 17 students for experimental group and 13 students for control group. The two groups participated in general athletic class as common class, and the experimental group participated in after school class additionally. The general class taught track and jump skill for 3 hours a week, and the after school class taught only athletic running skill for 30 minutes a week. Pre and post test assessed to assess students' kinematic changes. Findings indicated that velocity and step rate were increased, and contact time, step length, displacement of center of mass were decreased in the experimental group. In the control group, early velocity, knee/hip angle velocity were increased, and contact time, step length, displacement of center of mass were decreased. In conclusion, the students who only participated in general class, could not maintain athletic skills obtained from the class. However, students who participated in both general and after school class accomplish athletic start skill. This is because Continuous learning effect helped students keep the skill and did not lose the skill. Thus, in order for students to learn specific sport skills, joining after school class with general class together is recommended.

• 대한산업공학회지
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• 제14권1호
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• pp.31-42
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• 1988

This paper studies class-based turnover assignment rule in terms of the expected travel time in automated storage/retrieval systems (AS/RS). With the rack face not necessarily in square in time, travel time models of two and three-class systems are developed, from which class partition values are determined for single command cycle. Also, the effects of the system parameters such as the rack shape factor and the skewness of the ABC curve are evaluated on the travel time through example problems.

• 한국컴퓨터정보학회논문지
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• 제22권1호
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• pp.153-159
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• 2017

In recent years there has been a rise in the use and interest of the flipped learning as a teaching and learning paradigm. The flipped learning model includes any use of Internet technology to enrich the learning in a classroom, so that a professor can spend more time interacting with students instead of lecturing. In the flipped model, students viewed video lectures online outside of class time. Students then performed two kinds of assignments, a teamwork assignment and an individual work assignment, through the class time. In this paper, we propose a flipped educational model for a college class. This experimental research compares class of college algorithm using the flipped classroom methods and the traditional lecture-homework structure and its effect on student achievement. The result data of mid-term exam and final exam were analyzed and compared with previous year data. The findings of this research show that there was not a significant difference in the scores of student between two lecturing methods. The survey result and lecture evaluation by students show that students are in favor of the flipped learning.

• 공학교육연구
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• 제26권3호
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• pp.42-48
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• 2023

We compare engineering students' learning performance in introductory Statistics classes of the two class types, traditional in-classroom classes with a few reports and real-time online classes with quizzes. Rates of missing classes and turning in homeworks are also included to explain learning attitude. Scores of quizzes, midterm test and final test are used to assess performance. Upto the midterm, the class type is not significant, but rates of missing classes and turning in homeworks are significant. Since the midterm, in-classroom class type reveals better final performance than real-time online class type, rate of turning in homeworks is significant, but rate of missing classes is not significant.

• Journal of information and communication convergence engineering
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• 제6권2호
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• pp.154-157
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• 2008

A class-E RF(Radio Frequency) power amplifier for wireless application is designed using standard CMOS technology. To drive the class-E power amplifier, a class-F RF power amplifier is used and the reliability characteristics are studied with a class-E load network. The reliability characteristic is improved when a finite-DC feed inductor is used instead of an RF choke with the load. After one year of operating, when the load is an RF choke the output current and voltage of the power amplifier decrease about 17% compared to initial values. But when the load is a finite DC-feed inductor the output current and voltage decrease 9.7%. The S-parameter such as input reflection coefficient(S11) and the forward transmission scattering parameter(S21) is simulated with the stress time. In a finite DC-feed inductor the characteristics of S-parameter are changed slightly compared to an RF-choke inductor. From the simulation results, the class-E power amplifier with a finite DC-feed inductor shows superior reliability characteristics compared to power amplifier using an RF choke.