• Proceedings of the Korean Society of Applied Pharmacology
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• 1993.04a
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• pp.176-176
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• 1993

임상적으로 많이 노출될수록 간단백과 결합하여 항원을 생성함으로써 면역매개성 간염을 유발하는 Halothane을 사용하여 mice에서의 세포매개성 면역선택하였다. Halothane을 복강투여로 2회, 4회 투여한 후 11, 15, 18일 후 지라세포를 이용하여 ConA유도 임파구 분열능을 검색해본 결과 2회 및 4회 투여 시에 15일까지는 대조군과 비교하여 현저히 저하되나 18일 후 오히려 증가하고 ConA유도 IL-2의 생성능은 2회 투여 시 15일 까지는 정상군에 비해 유의적인 차이가 없었으나 18일 이후 현저히 증가하였다. 4회 투여 시 15일까지는 대조군에 비하여 현저히 저하되었고 18일 이후에는 오히려 증가하는 것으로 관찰되었다. 혈청 ALT, AST는 유의적인 차이가 없었다. 또한 이와 같은 실험 결과가 개체간의 차이를 보이는가 알아보기 위하여 개체별로 검정을 한 결과 개체간의 편차는 없는 것으로 관찰되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1229-1231
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• 2011

대량의 분류 규칙 탐사 과정은 앙상블기법을 사용하여 다양한 연구들이 이루어지고 있다. 본 논문에서는 의사결정 트리의 분열 문제와 singleton 포함 한계를 해결하기 위하여 Cascading-and-Sharing 앙상블 기법을 적용하여 점진적 다중 의사결정 트리를 구축하였다. 또한 분류의 정확도를 향상시키고, 트리의 복잡도와 모델 과잉접합을 피하기 위하여 다중 트리 구축과정에서 선형 상관분석기법을 기반으로 훈련 데이터 속성들의 중복성을 제거하였다. 실험 결과, 속성들의 중복성을 제거하여 구축한 트리들은 원래 기법보다 더 좋은 결과를 보여주었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.547-548
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• 2021

In this paper, we consider inner inheritance of parent objects to their child objects in SR DEVS. The inheritance process of function is implemented by the inside inheritance function when the inherited parent object is determined. In the inside inheritance, the integrity and fragment inheritance can be divided as th asset property. Also, the function process is requested when the inheritance selection in th inheritance is occurred to several assets. The child object can receive assets from the parent object through the determination method of selection function to the inside inheritance.

• Journal of Service Research and Studies
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• v.11 no.4
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• pp.21-42
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• 2021

This study was conducted to derive a Korean model that can permanently maintain and develop Korea. After analyzing Korean society, especially modern Korea, which was the foundation of the founding of the Republic of Korea, a Korean model that can lead Korean society as a sustainable society in human society was derived. The situation of Korea and Koreans was analyzed from a fundamental level. We analyzed the root causes of deepening division and conflict and vague concepts of freedom and justice, and presented a Korean model of the Republic of Korea based on the founding ideology and constitutional spirit of the Republic of Korea to solve these problems. The necessary conditions for being a Korean were derived from the founding ideology and constitutional spirit of the Republic of Korea, the indigenous ideology of Korea, and the fashion and lifestyle of Koreans, derived. In addition, basic axioms for the Korean model were presented, and the structure of the Korean model was designed based on this. The Korean model is presented so that Korean society can lead the human society and be happy for a long time. Reflecting the results of in-depth analysis of the ideological foundations of modern Koreans, a new long-term sustainable structure for Koreans with various ideologies to live well together was proposed. The new Korean model was named the service-oriented Korean model. This is because it is a model centered on thorough checks and balances between all opponents, because it is a multidimensional dynamic Korean model rather than a simple linear one-dimensional Korean model, and because it is a Hwajaengtaeguk model that accurately expresses the identity of Koreans. It was proposed as a model for the sustainable development of Korean society. A follow-up study on specific Korean education programs is needed in the future.

• Journal of Digital Convergence
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• v.13 no.4
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• pp.303-310
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• 2015

Game technologies are now applied in various engineering areas such as the simulation of surgical operation or the implementation of a cyber model house. One of the essential and important technology in these applications is cutting of the 3D polygon model in real time. Real-time cutting technology is an essential technology needed to implement the simulation of a building demolition or a car assembly for training or educational purpose. Previous cutting method using the conventional BSP-Tree structure has some limitations in that they divide the whole world including the 3D model and its environment, only into two parts with respect to an infinite plane. In this paper, we show a technique cutting the 3D model in a finite extent in order to solve this problem. Specifically, we restricted the cut surface in a finite rectangular area and constructed the mesh for the divided surface. To show the usefulness of our partial cutting technique, an example of the dismantling process simulation of a nuclear reactor polygon model was illustrated.

• The Journal of the Korea Contents Association
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• v.17 no.12
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• pp.34-48
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• 2017

The narratives of the digital age have attempted interactions, and the interactive storytelling represented by the Branch Narratives has a problem of the expensive production cost of many optional implementations and poor narrative compared to linear story. As an alternative to this, this study proposes a user-oriented storytelling using user's personality traits. Using the Enneagram, a model of human psyche, and the Actantial model of the semiotician Greimas, when stories and characters are the same, the story could be reconstructed by deriving different topics from the same story according to the user's Enneagram personality type. The theme is determined by defining the axis of the desire of the Actantial model by respectively setting the character with the user's Enneagram type as the subject and the core value in the type as the object. The axis of Power could be defined by the stress and security points in Enneagram. In this way, we can derive the themes of 9 Enneagram types and the corresponding Actantial model and make plots. The users will appreciate one of these reconstructed plots in different perspectives and themes, depending on their personality type. In this study, we applied the above methodology to the story of the pansori novel "Tokkijeon". User-centered storytelling is a new attempt to predict user's choice and reconstruct the story based on the user's personality and perspective.

• Journal of Advanced Marine Engineering and Technology
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• v.28 no.7
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• pp.1123-1130
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• 2004

Numerical simulations have been carried out to investigate the effect of nozzle hole geometry on the combustion characteristics of the large diesel engine. 6S90MC-C. Spray and combustion phenomena were examined numerically using FIRE code. Wane breakup and Zeldovich models were adopted to describe the atomization characteristics and NOx formation processes. Predictions on the cylinder peak pressure and NOx emission were first verified with the experimental data to confirm the reliability of numerical calculations. The comparison results showed good agreements within the range of 0.64% and 4.6% respectively. Finally, the effects of fuel spray angle and diameter on the engine performance were investigated numerically to find the optimum nozzle hole geometry considering fuel consumption, NOx emission and heat flux of the combustion chamber wall. It was concluded that the combustion gas recirculation in cylinder by changing fuel injection direction is an effective method to reduce NOx emission by about 10% with increasing fuel oil consumption, 1.4% in a large diesel engine.

• Journal of ILASS-Korea
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• v.5 no.2
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• pp.53-60
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• 2000

An aerodynamically progressed model, which is called APTAB model. has been proposed for more accurate prediction of the deformation and breakup of a spray. Especially, the effects of the droplet deformation on the droplet aerodynamic external force are considered in this model, which was neglected in TAB model. It is found that the predicted droplet deformation using APTAB model shows better agreement with experimental data than those of other models for the droplets in both bag-type and shear-type breakup regimes. A new breakup criterion has been proposed to predict more reasonable breakup quantities, such as breakup deformation length, time and so on; i.e., it is defined that the breakup occurs when the internal liquid phase pressure of the deformed droplet at the equator is greater than that of the pole. The proposed breakup criterion shows more physical relationship between the degree of droplet deformation at breakup and the corresponding breakup Weber number as compared with the results with TAB and DDB models. Therefore, it provides better predictions of the experimental data than TAB and DDB models for the droplet deformation and time in both bag-type and shear-type breakup regimes.

• Journal of ILASS-Korea
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• v.24 no.4
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• pp.185-193
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• 2019

The effervescent atomizer is one of twin-fluid atomizers that aeration gas enters into bulk liquid and two-phase flow is formed in the mixing section. The effervescent atomizer requires low injection pressure and small amount of aeration gas, as compared to other twin-fluid atomizers. In this study, cold flow test was conducted to investigate the spray characteristics of aerated impinging jets. The present effervescent impinging atomizers were composed of the aerator device and like-on-like doublet impinging atomizer which had different impinging angles. To analyze the spray characteristics such as breakup length and droplet size distribution, the image processing technique was adopted by using instantaneous images at each flow condition. Non-dimensional parameters, induced by the homogeneous flow model, were used to predict the breakup length. The breakup length was decreased with the mixture Reynolds number and impinging angle increasing. The result of droplets showed that the size distribution was axisymmetric about the center of the injector and their diameter tended to decrease with increasing GLR.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.72-75
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• 2009

XML과 웹서비스의 등장으로 전자문서 관리의 중요성이 대두되었고, 효율적인 관리를 위해 많은 기업들이 기술 개발을 해오고 있다. 그러나 웹언어나 프로토콜에 대한 공개 표준이 제정 되지 않아 기업들은 개별적으로 웹서비스를 구축하고 이는 인터넷 시장과 웹의 분열을 가져왔다. 이에 W3C에서는 웹 상호운용성을 목표로 XML표준안을 공표했다. MusicXML, MathML, CML(Chemistry Markup Language), WML(Wireless Markup Language)등은 모두 특정한 용도를 가지는 XML기반의 마크업 언어들이다. XML은 단지 웹 환경만을 위한 표준이 아니라 인터넷 전반에서 데이터를 생성, 저장, 변환하기 위한 보편적인 표준으로 자리 잡고 있다. 본 논문에서는 모바일환경과 웹 환경에서 동시 서비스가 가능한 XML 웹서비스를 구현하였다. XML 웹서비스는 인터넷 표준기술인 XML과 HTTP를 사용하는데, XML기반의 SOAP메시지를 파싱하기 위하여 WIPI와 HTML기반으로 설계, 개발하였다. 제안하는 XML Parser는 PULL모델을 변형한 이벤트 방식이다. 제안한 Parser는 모바일기기와 웹 환경에서 동시 사용가능한 인터넷 서점에 적용하였고, 제안하는 XML Parser와 기존의 Parser들과의 벤치마킹을 통해 속도비교를 함으로써 Parsing속도의 향상을 나타내었다.