• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -3
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• pp.1515-1518
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• 2002

This paper proposes an active contour model to detect facial regions in a given image. Accordingly we use the color information human faces which is represented by a skin color model. We evolve the active contour using the level set method which allows for cusps, corners, and automatic topological changes. Experimental results show the effectiveness of the proposed method.

• 디지털융복합연구
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• 제7권1호
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• pp.73-80
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• 2009

In this study, the pricing performances of alternative simple option models are examined by creating a simulated market environment in which asset prices evolve according to a stochastic volatility process. To do this, option prices fully consistent with Heston[9]'s model are generated. Assuming this prices as market prices, the trading positions utilizing the Black-Scholes[4] model, a semi-parametric Corrado-Su[7] model and an ad-hoc modified Black-Scholes model are evaluated with respect to the true option prices obtained from Heston's stochastic volatility model. The simulation results suggest that both the Corrado-Su model and the modified Black-Scholes model perform well in this simulated world substantially reducing the biases of the Black-Scholes model arising from stochastic volatility. Surprisingly, however, the improvements of the modified Black-Scholes model over the Black-Scholes model are much higher than those of the Corrado-Su model.

• 한국정보시스템학회:학술대회논문집
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• 한국정보시스템학회 2004년도 추계학술대회
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• pp.444-453
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• 2004

This research investigates the rising new role of mileage system as private e-money in a exploratory study. The key research questions are 'How does mileage system evolve with expansion of e-business and what are the cases for real experiences in 'money-like' mileage and their implications?' This research focuses on the proposition that mileage points created in commercial transactions as a royalty program are observed to serve a new role as payment tool. In an attempt to identify factors that determine mileage system as private money, we employ three factors: confidence, transaction cost, and monetary freedom. Also, this research proposes a direction for further research and follow-up studies to establish legal and institutional issues and the relevant architecture, all of which are essential elements to make the mileage points global money with a certain trade ratio in the near future.

• 천문학회보
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• 제38권1호
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• pp.51.2-51.2
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• 2013

We present observational results of CO outflows towards 24 embedded young stellar objects (YSOs), which are selected from the targets of the Herschel key program, "Dust, Ice, and Gas in Time" (DIGIT). Molecular outflow activity, which is believed to have strong dependence on accretion process, is the most powerful in the early embedded phase of star formation and declines as the central protostars evolve to the main sequence stage. In order to study the relation between the CO outflows observed in low J transitions and the properties of protostars, we mapped the CO outflows of the selected targets in J=1-0 and J=2-1 with the 14-m TRAO telescope and the 6-m SRAO telescope, respectively. We also compare the CO outflow momentum fluxes with the FIR molecular line luminosities of CO, $H_2O$, OH, and OI, which were detected by the Herschel-PACS observations.

• 한국조경학회지
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• 제18권3호통권39호
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• pp.11-22
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• 1990

Culture has long been associated with and advanced by stone as observed in prehistoric dolmen, menhir, megalith monuments, memo-rial stones, and others. The closs association of monuments is seen even in an earlist form of culture and is witnessed to evolve with human history. Korea, with its large quality granite repository, has been active with granite-based monuments in various forms of towers, bridges, and larterns. These stone structures are so abundant throughout Korea that Korea has been called the country of stone tower in Asia. With this historical background, we survey these Korean memorial stone and monuments, found at roadsides, momerial buildings, village entrances, scenic places, schools, sermon halls, public pleasure ground, and other common places. Based on installation orientation, location, and size, a particular emphasis is on the structural value, meaning, beauty, and function of these momnuments coupled with trees, shrubs, water and appropriative landscapes.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.314-316
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• 2017

금전적 수확 등의 목적으로 네트워크 사용자들의 컴퓨터 및 파일을 잠근 후 금품을 요구하는 악성 프로그램 랜섬웨어(Ransomware)의 진화가 계속될 전망으로, 메일 시스템에서 업무정보를 주고 받는 기업의 생존권에 있어 랜섬웨어는 위협적인 존재이다. 이러한 위협에 있어, 분산원장(Distributed Ledger) 기술인 블록체인(Blockchain)을 활용하여 랜섬웨어 이상징후 데이터로써 자동 생성되는 블록을 기업 내 보안정책에 바로 연계되도록 하여 메일 시스템에서의 랜섬웨어를 사전방지하는 블록체인 모델을 설계한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 G
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• pp.2183-2185
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• 1998

In this paper, we propose a method of designing neural networks using biological inspired developmental and evolutionary concept. The living things are best information processing system in themselves. One individual is developed from a generative cell. And a species of this individual have adapted itself to the environment by evolution. Ontogeny of organism is embodied in cellular automata and phylogeny of species is realized by evolutionary algorithms. The connection among cells is determined by a rule of cellular automata. In order to obtain the best neural networks in the environment, we evolve the arrangement of initial cells. The cell, that is neuron of neural networks, is modeled on chaotic neuron with firing or rest state like biological neuron. A final output of network is measured by frequency of firing state. The effectiveness of the proposed scheme is verified by applying it to navigation problem of robot.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 C
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• pp.961-963
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• 1998

Power telecommunication networks, being used to support the operation and management of power utility services, exhibits different characteristics from those of public domain networks. KEPCO is planning to evolve its own power network infrastructure to exploit ATM (Asynchronous Transfer Mode) technology. The ATM network to be developed needs to effectively utilize existing network of KEPCO and to fully support new and emerging power-utility-services. This paper summarizes the features of power communication services and the characteristics of Power telecommunication networks, and reports our evolution methodology for KEPCO network.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 C
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• pp.1050-1052
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• 1998

As the power systems evolve, they are incorporating increasingly complex control and protection functions. Due to this, utilities are relying more and more on real-time simulators to study complex system interaction problems. This paper addresses some key questions regarding the needs of such simulators and their characteristic features/requirements. In countries like France and Canada, large scale simulators are developed and placed in practical use, and in others are now under development. Following this background, three typical simulators(ARENE, RTDS/HYPERSIM) will be examined focusing on the purpose, technology and experiences in a real-time simulator. Discussion will be extended to the future issues and potentials of the power system simulation.

• Genomics & Informatics
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• 제2권4호
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• pp.167-173
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• 2004

The main mechanism of evolution is that biological entities change, are selected, and reproduce. We propose a different concept in terms of the main agent or atom of evolution: in the biological world, not an individual object, but its interactive network is the fundamental unit of evolution. The interaction network is composed of interaction pairs of information objects that have order information. This indicates a paradigm shift from 3D biological objects to an abstract network of information entities as the primary agent of evolution. It forces us to change our views about how organisms evolve and therefore the methods we use to analyze evolution.