• The Journal of the Korea Contents Association
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• v.10 no.4
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• pp.175-185
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• 2010

This article aims to compare the implications of masked dance in Hahoe with Gangneung masquerade and analyze them, in terms of the transition of the rituals. The results are as followings; Byulsin exorcism of Hahoe was the worship for God who people believe protects us from the evil. However, from the making of the mask in Hahoe masquerade. The movement of the dance features the spontaneous, changeable, depending on atmosphere of the stage or the host of the performance. Hahoe masquerade has the religious suggestion in the organization; it is one of the festivals, wishing for peace, good harvest of the village, in the content of the performance. From the roles of casts, the implications of the rituals are inferred; such the characters as Yangbankwangdae, Somaekaksi, Sisittakttaki, and Jangjamari have the implication of the repelling. But, the movement of the masked dance lost the original fashion in the process of restoration and faced the change. Therefore, most of the movements are tuned to falk of Gangneung; it doesn't have essence of the rituals. Finally, Gangneung masquerade has a factor of amusement of the Dano festival, wishes for well-being, good harvest of the village and includes the ritual of a guardian deity of the town, like the tutelary masquerade.

• Journal of Elementary Mathematics Education in Korea
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• v.13 no.2
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• pp.247-268
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• 2009

The purpose of this study was to examine the mathematical components of word problems and the structure of the components, to examine the characteristics of the understanding of mathematics high achievers about word problems, and ultimately to devise a teaching method geared toward facilitating learner understanding of the word problems. Given the findings of the study, the following conclusion was reached: First, word problems could be categorized according to their mathematical components, namely the mathematical structure of multiple variables provided to learners for their problem solving. And learner's reaction might hinge on the type of word problems. Second, the mathematics high achievers relied on diverse strategies to understand the mathematical components of word problems to solve the problems. The use of diverse strategies made it possible for them to succeed in problem solving. Third, identifying the characteristics of the understanding of the mathematics high achievers about word problems made it possible to layout successful lesson plans that stressed understanding of the mathematical structure of word problems. And the teaching plans enabled the learners to get a better understanding of the given word problems.

• The Journal of the Korean dental association
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• v.22 no.10 s.185
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• pp.855-860
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• 1984

국산 세치제와 잇솔이 갖추어야 할 기본요건과 개발방향이 제시된 세미나가 지난해에 이어, 지난 7월 14~15일 양일간에 걸쳐 속리산 관광호텔에서 구강보건학계와 럭키ㆍ부광ㆍ태평양등 국내 3대 세치제 제조회사의 52명이 참석한 가운데 서울치대 예방치학교실 주최로 개최되었다. 총 13개 연제가 발표된 이번 세미나에서는, 국민 복지를 빨리 증진시키기 위하여, 기업간의 건전한 경쟁을 유도하고, 기술개발을 촉진하며, 국산품의 품질 개선, 가격인하, 국제경쟁력의 신장등, 정부의 기본방향을 재확인하는 동시에 거시적이고 원시적인 안목으로 볼때 기술개발을 위한 산학활동과 선업간의 협력은 산업발전을 통하여 국민복지 증진에 분명히 기여할 수 있음을 강조한 서울치대 김종배교수의 주제 발표와 세치제의 주요작용, 세치제의 abrasiveness 및 polishing 효과와 용어의 정의, 개인에 적합한 세치제의 선택방법, Monofluorophosphate와 plaque 및 타액의 상호작용, 세치제의 선호변인 분석, 세치제 광고문안상의 문제점, 세치제의 전망, 세치제의 전망, 세치제 개발의 제요소, 세치제의 검정 기준과 과정, 잇솔의 기본요건과 시판잇솔의 규격, 잇솔의 강모형태와 탄력성에 관한 이론적 고찰, 개인에 적합한 강모강도를 가진 잇솔의 선택방법, 「A study on the F'ion concentration of commercial dentifrices」에 대해 폭넓고 진지한 토의가 있었다. 다음은 이날 발표된 내용을 요약정리한 것이다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.04a
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• pp.228-231
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• 2011

Burning rate of a propellent is an essential factor when designing a propulsion system. In order to come up with burning rate, first we need to design and build propellent grain to get neutral pressure curve. Then check the pressure with ground test and calculate the burning rate using burning rate equation. This burning rate is then compared to the burning rate of a propellent which was resulted from making a standardized specimen and combusting it using a strand burner. An accurate burning rate is calculated after comparing those two burning rates. For this study, compact propulsion system was designed, produced, tested and analyzed in order to get burning rates, an essential factor in propulsion system design, in an effective way.

• Journal of the Korean Society for Marine Environment & Energy
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• v.6 no.4
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• pp.45-51
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• 2003

The reflection and transmission of submerged breakwater with trapezoidal type are computed numerically using boundary element method. The analysis method is based on the wave pressure function with the contlnuit? in the analytical region including fluid and porous structures. Wane motion within the porous structures is simulated by introducing the linear dissipation coefficient and added mass coefficient. The results indicate that transmission and reflection coefficient are determined due to the change of slope of submerged breakwater with trapezoidal type.

• Journal of Korean Philosophical Society
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• v.126
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• pp.79-108
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• 2013

Is the development of linguistic competence due to the learning process or the maturational process? According to Piaget, its development is a genuine learning process involving authentic constructions with gradual disclosure of new possibilities. But According to Chomsky, the acquisition of linguistic competence is due to a genetically conditioned maturational process. So it merely involves the actualization of a set of possibilities existing from the beginning Consequently, Piaget supposes that interaction with the environment plays a shaping role, while Chomsky allows it to have a mere triggering role. In broad respective, Chomsky supposes the rationalism that knowledge is largely inborn, while Piaget in the constructivist position which strives to find a middle course between radical rationalism and radical empiricism. In the one hand, an ultra-rationalistic concept such as 'fixed nucleus' supposed by Chomsky is, in my eye, nor plausible. In the other hand, if Piagetian constructivism is to be sustained, it must be sustained independently of its dubious biological fundament, and merely as a developmental psychological theory. In one word, we need to synthesize Piagetian cognitive approach and Chomskian syntactical, in order to explain exactly the source of human linguistic competence.

• Journal of the Korean Ceramic Society
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• v.38 no.7
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• pp.608-614
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• 2001

수지결합질 탄소재의 사출성형시 중요한 요소는 열유변학적 거동이다. 수지결합질 탄소재의 열유변성, 기계적 물성은 충진제(흑연)의 표면상태에 영향을 받는다. Coupling 처리에 의한 충진제의 표면개질은 binder와의 젖음성과 호환성 등에 영향을 미쳐 수지결합질 탄소재의 특성을 향상시킨다. 본 연구에서는 충진제의 표면개질을 위해 실란 coupling 처리하였다. 충진제의 표면에 코팅된 실라놀은 FT-IR과 침수거동 관찰결과 충진제 표면에 단층으로 코팅되었음을 보였다. Coupling 처리는 충진제 표면에 활성을 가함으로써 수지결합질 탄소재의 열유변학적 거동과 기계적 물성에 기여하였다.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2011.04a
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• pp.773-777
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• 2011

본 논문에서는 국부적으로 비선형 거동을 보이는 고전적인 $J_2$ 소성흐름 이론에 근거한 탄소성 문제의 해를 효율적으로 구하기 위해 전체-국부 확장함수를 지닌 일반유한요소법을 제안한다. 제안된 기법은 비선형 거동을 보이는 영역을 포함하는 국부 문제의 비선형 해를 구하고 이를 일반유한요소법의 단위 오목 분할의 개념을 통해 전체 문제의 해 공간을 확장하는데 이용한다. 이는 적은 계산량으로 복잡한 탄소성문제의 정확한 해를 얻는 것을 가능하게 하며 기법의 강건성과 정확성을 입증하기 위한 수치해석 예제가 다루어진다.

• Journal of Animal Science and Technology
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• v.51 no.1
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• pp.25-32
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• 2009

This study was conducted to determine the effects of probiotics supplementation on growth performance, nutrient digestibility, occurrence of diarrhea and immune response in weaning pigs. Treatments were 1) NC (basal diet), 2) PC (basal diet + 0.12% avilamycin) and 3) A (basal diet + 0.2% Aspergillus oryzae), 4) B (basal diet + 0.2% Lactobacillus casei), 5) C (basal diet + 0.2% Bacillus subtilis), 6) D (basal diet + 0.2% Lactobacillus crispatus). A total of 120 pigs ($7.16\pm0.01$ kg average body weight, weaned at $23\pm3$days of age) were assigned to 6 treatments, 5 replicates and 4 pigs per pen in a randomized complete block (RCB) design. During the whole experimental period, body weight (P<0.01), average daily gain (ADG; P<0.01), and average daily feed intake (ADFI; P<0.05) of treatment PC were higher than other treatments. However, the probiotics treatments tended to increase ADG and G:F ratio compared to treatment NC. The G:F ratio in treatment A (Aspergillus oryzae) was similar to treatment PC during the whole experimental period (P<0.05). The supplementation of probiotics in the diet of weaning pig did not change nutrient digestibility (dry matter, crude protein, crude fat and ash) and nitrogen retention of weaning pigs. In blood urea nitrogen (BUN) concentration, treatment B had lower value than other treatments at 2 and 4 weeks (P<0.05). Treatments PC and C tended to decrease diarrhea score than other treatments (P=0.18). At 3h after lipopolysaccharide (LPS) injection, treatments NC and PC had higher count of $CD^{4+}$ T-cells than probiotics treatments, and treatment C showed the lowest value (P<0.01). There were no differences on count of $CD^{8+}$ T-cells and $CD^{4+}:CD^{8+}$ ratio among all treatments (P>0.10). These results suggest that the dietary probiotics are likely able to improve the growth performance, occurrence of diarrhea and immune response although they do not have similar effects like antibiotics in weaning pigs.

• Journal of Radiation Protection and Research
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• v.17 no.2
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• pp.49-59
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• 1992

A new model was developed in order to investigate the effects of chelating agents on the migration of a radionuclide in the form of ion or chelate. The migration behavior of the chelated radionuclide was analyzed by formulating a convective-dispersion transport equation which included a degradation of chelating agent and chelated radionuclide. The mathematical model was analytically solved and checked with the existing retardation factor. The results show that the migration velocity of the chelated radionuclide was much faster than the ionic one due to the decreased retardation. Therefore, it was concluded that a new remedial action should be developed to reduce the generation and release of chelating agents from the nuclear power plant into the environment.