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김완수(Kim, Wansoo),한영희(Han, Younghee) 한국생활과학회 2020 한국생활과학회지 Vol.29 No.2
To investigate the consumption and the purchasing behavior of beverages according to gender and intake level among students, a total of 370 urban college students in Cheongju and Gwangju were surveyed with respect to general characteristics, dietary habit, purchasing behavior, and intake level of beverages. The main timing and site of purchasing beverages were for quenching the thirst or for resting, and convenience stores, respectively, and the most important reason was ‘taste’ when choosing beverages. Among the subjects, 44.6% checked the nutrition label of beverages when purchasing, and 52.7 and 94.1% responded ‘no’ with respect to their experiences in educational programs on nutrition labeling and reducing sugar intake, respectively. These results show significant differences between gender, but not among different levels of drinking groups. A 3.5 L of average drink level and 3.7 beverage types weekly with the most consumption of sweetened carbonated soda, unsweetened Americano coffee, milk, ion supply drinks, and tea were revealed. The highest drinking level group, comprising a habitual drinker with 6.6 L weekly of an average level, showed 9.4 and 3.2 times higher in drinking level and the type of beverages, respectively (p<0.001) than the lowest level drinking group. Based on these findings, the consumption of beverages becomes habitual and increases in level among college students, which would be considered with respect to health problems from excessive intake of sugar and caffeine. Thus, educational and promotional support for the intake level of beverages in moderation are needed.
효소저항성 쌀전분의 첨가가 마들렌의 품질 및 텍스처 특성에 미치는 영향
김완수(Kim, Wansoo) 한국생활과학회 2010 한국생활과학회지 Vol.19 No.1
This study attempted to examine the application of retrograded starch (RS3) isolated from rice flour into Madeleine which is easy to make, supply enough energy and micro nutrients with adequate drinks, and prevent an adult disease. This could be a popular food to anyone regardless of age and gender who avoid rice and become high value-added, processed rice foods. For this, control Madeleine was made from wheat flour and an experimental one was made from 5 or 10% rice RS3 addition as well as wheat flour. Four different types of rice were produced from Premium Ho-Pyong Rice, that is, dry milled rice flour(RFD), soaked for 8 hours and milled, followed by air-dried rice flour(RFW), rice starch(RST), and retrograded rice starch or enzyme-resistant starch(RS3). The results found were as follows: Proximate compositions were decreased with soaking to make RFW, RST and RS3, compared to RFD. RS3 had the highest L, +a and △E with the lowest +b, changing it to a dark color, explaining the need for heat control during processing. At 80℃, the swelling power was shown in the order of RST>RFW>RFD>RS3 and the solubility of RS3 was the highest. There were significant differences in viscosities of peak, trough, cold, breakdown and total setback of all rice samples using RV A (p<0.00 I). Due to the pH of RS3, the Madeleine batter became acidic (p<.01) and expanded, resulting in more air cells and open texture. With an increasing RS3 level in Madeleine, several textural attributes among 'fresh' and 'stored at room temperature' Madeleine samples were significantly different by using Texture Analyzer. While the addition of RS3 in Madeleine did not significantly affect the sensory evaluation, indicating RS3 isolated from rice as a beneficial ingredient for processed rice products.
천체투영관 수업이 학생들의 천문 개념 이해에 미치는 효과
김완수 ( Wansoo Kim ),심현진 ( Hyunjin Shim ) 경북대학교 과학교육연구소 2018 科學敎育硏究誌 Vol.42 No.1
천문학은 학생들이 쉽게 흥미를 느끼는 분야로 과학에 대한 호기심을 토대로 과학적 핵심역량 함양에 중요한 역할을 한다. 그러나 제한된 공간인 교실에서 이루어지는 학교 교육을 통해서는 천문학의 핵심 개념 이해에 필요한 공간적 사고를 발달시키기 어렵다. 주로 과학관에 위치하며 체험, 관람시설의 성격을 지닌 천체투영관은 시간과 공간의 제약을 넘어 천문학 개념을 교수할 수 있는 공간으로, 천체투영관에서 진행되는 비형식 교육은 정규 교육과정을 보완할 수 있다. 본 연구에서는 천체투영관을 이용한 교육 프로그램을 개발하고 이를 초등, 중등, 고등학생에게 적용하여 천체투영관이 천문 개념에 미치는 효과를 살펴보았다. 국립대구과학관 1박 2일 캠프에 참가하여 천문 교육 프로그램을 수료한 학생을 대상으로 연구를 진행하였으며, 총 연구 기간은 8개월, 연구 대상 인원은 761명이다. 기존 캠프에서는 교실에서 방위, 별자리, 지구의 자전 등에 관한 수업을 진행하였는데 이와 동일한 내용을 천체투영관 수업용으로 개발하였으며, 수업 전과 후에 개념 이해 정도를 측정할 수 있는 검사 문항을 제작하였다. 이후 실제로 교실 수업 혹은 천체투영관 수업을 진행하여 수업의 효과를 비교하는 이질통제집단 전후검사 설계에 기초하여 연구를 수행하였다. 연구 결과 첫째, 천체투영관 수업은 교실 수업에 비해 방위, 지구의 자전, 별자리 개념 이해에 효과적이었다. 둘째, 성별이나 학생들의 사전 천문학 지식 정도 등과 같은 메타 요인과 무관하게 천체투영관 수업은 개념 이해도 향상에 긍정적인 효과가 있었다. 셋째, 고등학생에게 천체투영관 수업은 교실 수업 이후 추가적으로 수행하는 야간 관측 활동과 동일한 효과가 있었다. 따라서 야간 관측이 불가능한 환경에서 천체투영관은 이를 대체할 수 있을 것이다. 종합하면 천체투영관은 학생들의 천문 개념 이해에 도움이 되는 효과적인 교육 수단이라 할 수 있으며, 보다 효율적인 활용을 위해 앞으로 더 많은 연구가 필요하다. Astronomy is the subject that can easily draw students’ interest in studying science, therefore plays an important role in developing scientific core competence. However, it is difficult to develop spatial thinking that is required in understanding astronomical concepts through the classroom lessons. Planetarium, along with the science museum, is one of the most representative informal educational institution where astronomical concepts can be taught beyond time and space constraints. In this study, we developed the astronomy education program that is operated in the planetarium and applied the program to the elementary, middle and high-school students to investigate the effects of the planetarium lesson compared to the classroom lesson. The duration of this research was about 8 months, and the number of the students involved is 761, including participants of the 1 night and 2 days camps in the Daegu National Science Museum. The newly developed planetarium lesson is comparable to the previous classroom lesson of which topics are cardinal points, constellation, and the rotation of the earth. Test items were developed to evaluate the understanding of the astronomical concepts. The study was conducted based on the pre- and post-test with non-equivalent groups design comparing classroom and planetarium lessons. The results of this study are as follows. First, planetarium lesson is more effective for understanding astronomical concepts such as the cardinal points, earth's rotation, and the constellation than classroom lesson. Second, planetarium has a positive effect irrespective of gender and previous knowledge. Third, planetarium for high school students has the same effect as additional observation activities followed by the classroom instruction. Therefore, planetarium can be used as an alternative, effective tool when night observation is not available. In summary, planetarium is an effective tool that helps students to understand the astronomical concepts.
김완수(Wansoo Kim),이교구(Kim, Kyogu Lee) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.11
In this paper, we propose and evaluate a novel modular neural network model for sound event localization and detection (SELD). One SELD module extracts arrival time differences and detects sound events from phase and magnitude spectrogram. The assembled neural network model consists of nC2 numbers of SELD modules where n is the number of channels in the microphone array. The modular structure of the proposed model makes the model easier to train using less training data. The structure also makes the model scalable to microphone array shape change.