• Proceedings of the KAIS Fall Conference
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• 2011.12b
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• pp.485-487
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• 2011

본 논문에서는 인간의 근력을 보조 또는 증폭시켜 줄 수 있는 유압 구동식 외골격 로봇을 개발하였다. 인간 신체 데이터와 보행 분석 데이터를 기반으로 로봇의 외골격을 설계 하였으며, 이를 구동하기 위한 알고리즘, 제어기 H/W 등을 개발하였다. 근력지원 외골격 로봇을 설계 제작하여, 실제 실험을 통해 설계, 제어 등 로봇의 현장 적용 가능성 등을 판단할 수 있는 플랫폼을 가질 수 있었다.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 1995.03a
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• pp.202-212
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• 1995

지리정보시스템은 1980년 이후에 자연자원 관리뿐만 아니라 환경관리를 비롯하여 현재에는 지하시설물 관리 및 도시정보 관리 등을 위한 수단으로써 여러 분야에서 필수적으로 활용되고 있는데 그러한 예로 한국의 사회기반 시설물 GIS 구축방안(이태식 외, 1994), GIS를 이용한 통신선로 시설관리(최지선, 1994), GIS를 이용한 하천공간 데이타베이스 구축에 관한 연구(이태식 외, 1994), 금강유역 토양 유실 분석을 위한 GIS 응용연구(김윤종 외, 1994)등 있다. (중략)

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.3 no.2
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• pp.91-93
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• 1974

본(本) 논문(論文)은 유효온도차(有效溫度差)에 의(依)한 하기랭방부하계산법(夏期冷房負荷計算法)의 기초가 되는 서울에서의 상당외기온도(相當外氣溫度)를 구(求)한 것이다. 상당외기온도(相當外氣溫度)는 유효온도차(有效溫度差)를 구(求)하기 위한 것으로 이것의 산출(算出)은 서울의 외기온(外氣溫)을 T.A.C.(Technical Advisory Committee) 2.5% 위험율을 기준치(基準値)로 한 하기(夏期)의 설계용(設計用) 외기온도(外氣溫度)와 이론식(理論式)에 의한 전일사량(全日射量)에서 7월(月) 22일(日) 서울의 상당외기온도표(相當外氣溫度表)를 작성(作成)하였다.

• Journal of the Korea Concrete Institute
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• v.17 no.4 s.88
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• pp.551-558
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• 2005

The setting and hardening of concrete is accompanied with nonlinear temperature distribution caused by development of hydration heat of cement. Especially at early ages, this nonlinear distribution has a large influence on the crack evolution. As a result, in order to predict the exact temperature history in concrete structures it is required to examine thermal properties of concrete. In this study, the convection heat transfer coefficient which presents thermal transfer between surface of concrete and air, was experimentally investigated with variables such as velocity of wind, curing condition and ambient temperature. At initial stage, the convection heat transfer coefficient is overestimated by the evaporation quantity. So it is essential to modify the thermal equilibrium considered with the boiling effect. From experimental results, the convection heat transfer coefficient was calculated using equations of thermal equilibrium. Finally, the prediction model for equivalent convection heat transfer coefficient including effects of velocity of wind, curing condition, ambient temperature and boiling effects was theoretically proposed. The convection heat transfer coefficient in the proposed model increases with velocity of wind, and its dependance on wind velocity is varied with curing condition. This tendency is due to a combined heat transfer system of conduction through form and convection to air. From comparison with experimental results, the convection heat transfer coefficient by this model was well agreed with those by experimental results.

• Journal of Life Science
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• v.15 no.1 s.68
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• pp.15-20
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• 2005

The unstructured model was tested to describe mycelial growth, exopolysaccharide formation, and substrate consumption in submerged mycelial culture of Paeeiliomyees tenuipes C240. The Logistic equation for mycelial growth, the Luedeking-Piret equation for exopolysaccharide formation, and Luedeking­Piret-like equations for glucose consumptions were successfully incorporated into the model. The value of the key kinetic constants were: maximum specific growth rate ${\mu}m,\;0.7281\;h^{-1};$ growth­associated constant for exopolysaccharide production $(\alpha),\;0.1743g(g\;cells)^{-1}$; non-growth associated constant for exopolysaccharide production $(\beta),\;0.0019g(g\;cells)^{-1}\;;$ maintenance coefficient $(m_s),\;0.0572g\;(g\;cells)^{-1}$. When compared with batch experimental data, the model successfully provided a reasonable description for each parameter during the entire growth phase. The model showed that the production of exopolysaccharide in P. tenuipes C240 was growth-associated. The model tested in the present study can be applied to the design, scale-up, and control of fermentation process for other kinds of basidiomycetes or ascomycetes.

• Journal of the Korea Concrete Institute
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• v.15 no.2
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• pp.305-313
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• 2003

The setting and hardening of concrete is accompanied with nonlinear temperature distribution caused by development of hydration heat of cement. Especially at early ages, this nonlinear distribution has a large influence on the crack evolution. As a result, in order to predict the exact temperature history in concrete structures it is required to examine thermal properties of concrete. In this study, the coefficient of air convection, which presents thermal transfer between surface of concrete and air, was experimentally investigated with variables such as velocity of wind and types of form. From experimental results, the coefficient of air convection was calculated using equations of thermal equilibrium. Finally, the prediction model for equivalent coefficient of air convection including effects of velocity of wind and types of form was theoretically proposed. The coefficient of air convection in the proposed model increases with velocity of wind, and its dependance on wind velocity is varied with types of form. This tendency is due to a combined heat transfer system of conduction through form and convection to air. From comparison with experimental results, the coefficient of air convection by this model was well agreed with those by experimental results.

• KSBB Journal
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• v.19 no.6 s.89
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• pp.457-461
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• 2004

DO-stat fed-batch cultures of Agaricus blazei were carried out using various feeding solutions, for the production of mycelial biomass and exopolysaccharides (EPS). It was observed to be more effective to use a feeding solution containing both carbon and nitrogen sources than that containing only carbon source. The best result was obtained when a feeding solution containing 450 g/l glucose, 60 g/l yeast extract, 30 g/l soytone peptone was used. The maxium mycelial biomass and EPS concentrations were 36.5 g/l and 10.9 g/l, respectively, at 100 hours of cultivation. The mycelial and EPS productivities were 0.37 g/l-h and 0.11 g/l-h, respectively. As compared with the batch culture, the mycelial biomass concentration and its productivity were 6.0- and 2.2-folds increased, respectively. The EPS concentration and its productivity were increased by 4.7 times and 1.8 times, respectively.

• Journal of Nutrition and Health
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• v.51 no.5
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• pp.455-464
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• 2018

Purpose: This study was conducted to examine the status of dietary behavior and its association with study-related factors in middle school students. Methods: Study-related factors, dietary habit score and dietary behaviors were surveyed by questionnaire and then analyzed. A total of 580 students in some middle schools in Gyeonggi-do participated in this study. Collected data were analyzed using SPSS for windows Ver. 22.0. Results: 71.3% of the subjects slept for 6 ~ 8 hours, and the studying time outside of school was the highest (2 ~ 4 hours). The highest score for stress from studying by private lessons or academies was 'seldom stressed', with higher stress being observed in male students than female students. The average dietary habit score was 3.69 in male students and 3.62 in female students. The highest average time for meal eating was 10 ~ 20 minutes, with shorter times being observed for male students than female students. Eating meals was regular in most students and the highest number of snack eating was 1 ~ 2 times a day. For dietary behaviors by study-related factors, students with more than 2 hours of studying time outside of school showed higher dietary habit scores than those with less than 2 hours, who showed significantly higher rates of eating 2 meals a day. As the sleeping hours and daily average studying hours increased, the rate of regular meal eating increased significantly. Conclusion: The students showed good, above average dietary behaviors, but gender differences in study-related factors and dietary behaviors. Moreover, the sleeping hours and the studying time outside of school were correlated with dietary habit scores and dietary behaviors. Thus, continuous and systematic education for proper dietary behavior is needed along with greater interest in students with problems of study-related factors, particularly those due to study burden.

• Journal of the Korea Institute of Building Construction
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• v.21 no.5
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• pp.507-518
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• 2021

The application of an adhesive calcium carbonate-based hybrid insulation board with quasi-combustibility in the external thermal insulation composite system(ETICS) ensures effective thermal performance and fire safety. This study aimed to conduct a mechanical test of the quasi-non-combustible hybrid insulation board as well as its constituent materials to obtain the basic data for the structural design of the adhesive ETICS. Test specimens were fabricated based on domestic and foreign test standards to examine and evaluate their tensile, compressive, flexural, and shear strengths. The strength characteristics of the quasi-non-combustible hybrid insulation board were identified from the test results, which verified that the minimum required physical properties suggested by the current KS M ISO 4898 were met. Furthermore, the quasi-non-combustible ETICS used in this study was found to be suitable for use as an external insulation system for walls unless subjected to continuous gravity load, such as a heavy exterior finish.

• River and Culture
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• v.10 no.3
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• pp.106-108
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• 2014