• Korean Journal of Food Science and Technology
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• v.20 no.2
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• pp.252-255
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• 1988

The molding characteristics, hardness and overall quality of the Korean style disposible food tray made from the low and medium density polystyene sheets were investigated and the results were obtained as follows. The volume difference of 8 sectional trays was 56.4% between the two materials, and that of 5 sectional trays was 41.8%. The more the sectional number of the tray, the larger the volume difference. Medium density polystylene tray had the better solid characteristics and overall acceptance than the low density polystlene tray.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05b
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• pp.374-378
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• 1996

피동 원자로용기 냉각계통은 원자로 용기를 둘러싸고 있는 격납공기 외부가 공기에 자연순환에 의해 냉각하는 방식으로 공기 흐름 구동력은 원자로용기의 외부 유로의 공기와 주변 대기와의 밀도 차이에 의하여 피동적으로 형성됨에 따라 높은 작동 신뢰성이 보장된 개념으로서 본 연구에서는 공기입구 위치에 따른 영향 및 격납용기와 유로 벽면간의 복사 효과 까지를 고려 할 수 있도록 해석 모형을 개선 시키고 개선된 모형을 이용하여 계통을 구성하는 설계인자들이 계통의 성능 및 크기에 미치는 영향등을 분석하였다. 이러한 분석을 통하여 공기의 입구 위치가 계통의 열제거용량에 미치는 영향, 상향공기 유로에서의 복사 열전달 고려 유무가 해석 결과에 미치는 영향 그리고 설계인자와 계통 성능간의 상관성을 밝혔다.

• Korean journal of applied entomology
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• v.19 no.4 s.45
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• pp.243-248
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• 1980

Experiments were conducted to study on bionomics and control of cutworms; Agrotis tokionis, A. ipsilon, A. fucosa in Suweon, 1978-1979. A. ipsilon and A. fucosa had two or three generations and A. tokionis had one generation a year. A large number of A. toikonis occured at the end of September, and the major peaks of the first generation of A. tokionis and A. fucosa were in mid-June, the second generation in mid-August, and the third generation was at the end of September. These cutworms laid many eggs on the lower surface of curved downward leaf of Chinese cabbage and the larvae later than 3rd instar began to cut the basal part of stem and then pulled into the soil. A parasite of A. tokionis, a braconid wasp, Meteorus rubens, and two unidentified Ichneumnid wasps were found. Mocap and Volaton gave effective control to the cutworms but Volaton should be applied not to contact with plant.

• The monthly packaging world
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• s.68
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• pp.91-93
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• 1998

• The monthly packaging world
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• s.282
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• pp.93-101
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• 2016

딸기 포장재용으로 새로이 개발된 공중부양형 구조의 용기를 가지고 딸기가 유통 중 발생할 수 있는 짓물림 방지효과가 있는지를 분석하기 위해 일본 후쿠오카 현 쯔꾸시 시에서 도쿄까지 트럭과 항공기에 의한 수송시험을 했다. 일반적으로 사용되는 EPS용기는 수송 중 딸기 간 포장면적이 많아 흠집 발생면적이 컸으며, PET 트레이 위에 딸기를 배열시키는 '보통들이형 용기'는 과일끼리의 접촉부분에서 짓물림 현상이 많이 발생했다. 개발된 '공중부양형 용기'는 과일끼리의 접촉 없이, 유연한 PE필름으로 포장돼 수송 중 발생하는 딸기의 흠집 발생이 가장 적었다. 또한 'EPS 용기' 및 'PET용기'에 25Hz의 정상 진동을 가한 결과, 용기 내부에 발생하는 진동의 주파수 종류에 차이가 있음을 확인할 수 있었다. 'EPS용기'에서는 가진동의 25Hz보다도 큰 주파수의 진동을 많이 확인할 수 있었다

• Korean journal of applied entomology
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• v.38 no.3
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• pp.225-230
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• 1999

This study was conducted to determine the effect of pupal development and adult longevity of Spodoptera litura larvae reared on leaves of different leguminos plants of 11 varieties or cultivars. Pupal duration varied from 8.7 to 9.5 days depending upon different diets and duration of female pupa (8.3~9.1 days) was about 1 day shorter than that of male's (9.4~10.1 days). Prepupal an postpupal duration were 1.7 to 2.0 days and 6.7 to 7.7 days, respectively. Pupal weight ranged from 0.23g to 0.43g for female and 0.24g to 0.35 g for male. Percent change of pupal weight was lowest (11%) on geomjeongkong-1 and highest (16%) on bukwangkong. Adult longevity was in ranging from 7.8 days on dongbu to 11.2 days on bukwangkong and tended to become slightly longer in female than tin male. Significant relationships were recognized between moisture content of feeding leaf, the pupal duration and weight and adult longevity.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2016.05a
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• pp.101-102
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• 2016

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.2
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• pp.568-575
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• 2017

This study examined the effects of courage on happiness and the mediating effects of the decision making ability on the relationship between courage and happiness. The courage Inventory for Young Children (Park & Lee, 2011), The Children's decision making ability Scale (Park, 2012) and the happiness Questionnaire (Kim, 2008) were administered to 220 young children (112 boys, 108 girls, 5 year of age). The collected data were analyzed by descriptive statistics, Pearson's correlation analysis, multiple regression analysis, and a sobel test using the computer program, SPSS/PC 21.0. The results were as follows. First, there were significant positive relationships among courage, decision making ability, and happiness. Second, courage was an important factor in predicting the happiness of young children, and the decision making ability had mediating effects on the relationship between courage and happiness.

• The monthly packaging world
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• s.61
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• pp.118-129
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• 1998

현재 우리나라의 박스컨테이너는 그 자체의 특성상, 제품용도상 관리부문에서 막대한 누수가 발생하고 있으며 박스컨테이너의 난립으로 포장물류의 비표준화, 비규격화로 업체 상호간 거래시 비효율적인 운용등으로 물류비 상승요인으로 작용하고 있다. 또한 국내 산업계의 박스컨테이너 사용실정을 보면 1회용 포장용기에 대한 의존도가 높아 사용하고 난 후의 포장용기, 즉 포장폐기물의 처리가 커다란 문제로 대두되었으며 이는 환경친화적 포장용기 개발이라는 시대적 요구를 불러

• Journal of the Computational Structural Engineering Institute of Korea
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• v.28 no.5
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• pp.451-457
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• 2015

This paper presents the analytical closed form solution for the impact load of a collision between rigid bodies and its application to a spent nuclear fuel disposal canister accidentally dropped and impacted on the ground. This paper performed a study on the numerical rigid body dynamic analysis to compute the impact load between two rigid bodies, especially, the impulsive force which is applied to the spent nuclear fuel disposal canister in the accidental drop and impact event on the ground. Through this study the impulsive force which is occurring in the spent nuclear fuel disposal canister under accidental drop and impact event on the ground and required in the process of structural safety design of the canister is computed numerically. The main content of this numerical study is about the technical method how to compute the impulsive force applied to the canister under the accidental drop and impact event on the ground by using the commercial computer code for the rigid body dynamic analysis. On the basis of this study a problem to compute the impulsive force which is occurring in the canister in the case of collision with the ground is numerically treated. This numerically computed impulsive force is compared with the theoretical value, which shows a good agreement.