• Journal of KIISE:Software and Applications
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• v.30 no.12
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• pp.1208-1219
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• 2003

The Internet has become a part of our life and has changed our living environments dramatically. However, Electronic Commerce (EC) stays currently at a level that a buyer deals only with an one-sided condition (price) proposed by a seller or compares the proposed condition to find a better one. As the agent technology makes progress, EC requires negotiation that is not one-sided but is a way to maximize profits of both seller and buyer. Moreover, negotiation in EC should consider multiple issues rather than a single issue to replace the traditional commerce. In this paper we propose a negotiation model, which guarantees balanced profits between two agents through negotiation using multi-issues, and makes a deal successfully under time-constraint environment. The proposed negotiation model suggests strategies(alternative and simultaneous strategy) that change the value of issues with each agent has time for negotiation. In this paper, we also suggest a strategy that proposes an offer to each other. We compare the proposed negotiation model with another negotiation model. The experimental results show that dynamic conceder tactic and linear tactic showed balanced profits and a high percentage of deals for negotiation between two agents, and the sum of utilities of two agents is high, when the alternative strategy is used.

• International Area Studies Review
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• v.21 no.1
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• pp.3-24
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• 2017

The effects of strategic partnership can be positive or negative. This paper intends to explain why the partnership produces opposite results. This paper incorporates strategic behavioral direction and perceived values for relational performance. The conceptual model as well as empirical analysis was made and the results are as follows. First, this study uses bi-directional decomposition of two research constructs. The first construct of perceived values is classified into benefits and risks. Also, the behavioral directions are either active or passive behaviors. The critical path is found that the perceived benefits make significant effects on active behavioral direction which does on commitment. Another path is that the perceived risks make passive behavioral direction which results in opportunistic behaviors between strategically partnered firms.

• SUVANNABHUMI
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• v.5 no.1
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• pp.59-105
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• 2013

발리는 '신들의 섬', '세계의 아침', '지상의 마지막 낙원' 등의 이름을 갖고 있는 세계적으로 유명한 관광지이다. 본 논문의 목적은 이러한 세계적으로 유명한 여행목적지인 발리 관광을 통해 한국인은 동남아에 대해 어떤 인상을 갖게 되는가를 연구하고자했다. 최근 한국과 동남아 사이에 인간의 이동이 빈번해짐에 따라 문화교류 및 교차가 발생할 것을 전제로 하여 '한국 속 동남아현상'의 원인과 경로, 결과 등을 연구하는 배경 가운데, 특히 초국가적 단기이동으로서 관광을 통해 문화교류 및 교차에 대한 이해를 높이고자 한 것이다. 우선 관광목적지로 유인하는 요인에는 사회적, 지리적, 생태환경적, 문화적, 심리적 등등 다양한 요인들이 있고, 이러한 유인요인들을 매력적인 관광상품으로 개발하여 세계인들을 더 많이 유치하는 데는 관광정책에 달려있다. 무엇보다 민주화 이후 발리관광정책은 천해의 자연 및 지리조건은 물론 발리가 보유하고 있는 독특한 힌두문화, 그리고 발리를 신, 인간, 자연의 조화와 그 속에서의 평화를 체험할 수 있는 공간으로서 그 목적을 갖고 있다. 이러한 관광전략을 '지속가능한 그리고 공동체에 기초한 발전' 전략이라고 볼 수 있다. 설문지 경험분석을 통해 한국인이 발리에 도착하기 전까지 발리를 관광지로 선택하는데 영향을 준 미디어는 TV 드라마가 제일 크고, 인터넷, 여행정보지 그리고 지인 등의 순으로 나타나고, 한국인이 발리를 관광지로 선택하는 가장 큰 요인은 뜨거운 태양과 해변, 아름다운 자연환경임을 알 수 있었다. 또한 발리에 도착하여 발리에 대한 매력으로 느끼는 요소는 첫째가 역시 자연환경에서 주는 만족도가 제일 높고, 흥미로운 특징으로 볼 수 있는 것은 두 번째 요소가 편리한 숙박시설 즉, 잘 갖춰진 호텔에 대한 만족도가 2순위, 쇼핑이 3순위 그리고 다양한 문화와 예술이 4순위이다. 그리고 마지막으로 발리에 대한 이미지도 역시 자연환경에 대한 이미지가 가장 많은 영향을 차지하고 있고, 평화로움 그리고 신비로움 등이 발리에 대한 이미지로 자리잡고 있음을 알 수 있었다. 결국 초국가적 단기이동으로 한국인 발리행 관광을 통해 동남아적 자연환경과 문화에 대한 체험은 갖게 되지만, 단기이동의 한계로서 문화교류와 교차가 실질적으로 발생하는 것은 아니라고 볼 수 있다. 그러나 발리는 초국가적 문화의 장으로서 한국인을 포함하여 세계인과 함께 문화교류 및 교차의 장으로서 기능하고 있다고 볼 수 있다.

• KDI Journal of Economic Policy
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• v.33 no.1
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• pp.45-72
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• 2011

This study uses Korea's equity fund-related data ranging from Jan. 2002 to Apr. 2010 to analyze the existence of cross-subsidization among funds managed by the same management company. The findings are as follows: i) a transfer of performance outcome is confirmed to move from low-fee funds to high-fee funds, meaning that management companies tend to maximize their own interest than investors' return. And such a tendency has been strengthened since 2008. ii) young funds overperform old funds, iii) funds with high returns in the previous quarter perform better than funds with low return in the same period. These results suggest that in order to protect investors, it is necessary to conduct close monitoring on transactions that might undermine the benefits of investors and comprehensive evaluation on the capability of management companies.

• The Journal of the Korea Contents Association
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• v.9 no.2
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• pp.446-452
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• 2009

This study on strategy and its function in debate offer the materials of education concrete and practical to be able to improve the expression ability and comprehension ability of the students, and can give lots of help to improve the ability of application that can answer quickly in trouble circumstances. The type of strategy in the course of set up the theory are (1) the form of concept definition, (2) the form of solution offer, (3) inductive form and deductive form, (4) the form of example offer. The type of strategy in the course of contradict are (1) the form of soliloquy, (2) the form of claim comparison, (3) the form of partial recognition. The type of strategy in the course of cross examination are (1) the form of question in return and contradict, (2) the form of partial consent contradict. We believe this study will improve the communication ability and negotiation ability and also make a great contribution to improve the leadership of 21-century type if this study will be used in the field of education.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2203-2205
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• 2004

본 논문은 전략 기반 유전 알고리즘을 이용한 새로운 비선형 시스템의 퍼지 제어 시스템 설계 기법을 제안한다. 제안된 기법은 기존의 수학적인 접근 방법이 아닌 지능적 설계 방법을 사용하여 퍼지 제어피론 설계한다. 전략 기반 유전 알고리즘은 제어기의 안정화 조건을 만족시키며 최적의 성능을 잦는 제어 이득을 얻기 위해 유전 전략을 사용하여 교차와 돌연변이 영역을 변화시킨다. 최종적으로 모의실험을 통해 제안된 기법의 우수성을 확인하였다.

• Journal of Intelligence and Information Systems
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• v.29 no.1
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• pp.377-396
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• 2023

As the cryptocurrency market continues to grow, it has developed into a new financial market. The need for investment strategy research on the cryptocurrency market is also emerging. This study aims to conduct an empirical analysis on an investment methodology of cryptocurrency that combines short-term trading strategy and deep learning. Daily price data of the Ethereum was collected through the API of Upbit, the Korean cryptocurrency exchange. The investment performance of the experimental model was analyzed by finding the optimal parameters based on past data. The experimental model is a volatility breakout strategy(VBS), a Long Short Term Memory(LSTM) model, moving average cross strategy and a combined model. VBS is a short-term trading strategy that buys when volatility rises significantly on a daily basis and sells at the closing price of the day. LSTM is suitable for time series data among deep learning models, and the predicted closing price obtained through the prediction model was applied to the simple trading rule. The moving average cross strategy determines whether to buy or sell when the moving average crosses. The combined model is a trading rule made by using derived variables of the VBS and LSTM model using AND/OR for the buy conditions. The result shows that combined model is better investment performance than the single model. This study has academic significance in that it goes beyond simple deep learning-based cryptocurrency price prediction and improves investment performance by combining deep learning and short-term trading strategies, and has practical significance in that it shows the applicability in actual investment.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2004.04a
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• pp.247-250
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• 2004

본 논문은 비선형 시스템의 새로운 퍼지 제어기 설계 기법을 제안한다. 퍼지 제어기는 비선형 시스템을 제어하는데 많이 사용되는 기법 중에 하나이다. 퍼지 제어기를 설계하는 것은 시스템에 대한 깊은 수학적인 접근이 필요로 하기 때문에 수학적 배경 없이 설계하기 힘들다. 본 논문에서는 이를 해결하기 위해 길은 수학적인 접근이 아닌 지능적인 접근 방법을 사용하여 안정화된 퍼지 제어기의 설계하는 기법을 제안한다. 제안된 기법은 퍼지 제어기의 안정화 조건을 만족시키는 제어 파라메터를 전략 기반 유전 알고리즘을 사용하여 동정한다. 전략 기반 유전 알고리즘은 제어기의 안정화 조건을 만족시키는 해를 찾기 위해 전략적으로 교차와 돌연변이를 변화시킨다. 최종적으로 모의 실험을 통해 제안된 기법의 우수성을 확인한다.

• The Korean Journal of Financial Management
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• v.23 no.1
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• pp.243-266
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• 2006

This paper tests cross hedging performance of the KOSPI 200 stock index futures to hedge the downside risk of the KOSPI, KOSPI 200 and KOSDAQ50 spot market. For this purpose we introduce the minimum variance hedge model, bivariate GARCH(1,1) and EGARCH(1,1) model as hedge models. The main results are as follows; First, we find that the direct hedge performance of KOSPI 200 index futures is better than those of indirect hedge performance. second, in case or cross hedge performance the hedge effect of KOSPI 200 stock index futures market against KOSPI 200 stock index spot market is relatively better than those of KOSPI 200 index futures against KOSPI and KOSDAQ spot position. Third, for the out-sample, hedging effectiveness of the risk-minimization with constant hedge ratios is higher than those of the time varying bivariate GARCH(1,1) and EGARCH(1,1) model. In conclusion, investors are encouraged to use simple risk-minimization model rather than the time varying hedge models like GARCH and EGARCH model to hedge the position of the Korean stock index cash markets.

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.5
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• pp.593-597
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• 2004

This paper presents the new design method of fuzzy control system for nonlinear system. Many conventional design methods for fuzzy controller find the control gain for stabilizing fuzzy controller with some mathematical approaches. However, there exist some controllers which are hard to design with mathematical approach. In order to solve these problems, we propose the intelligent design method for fuzzy controller by using genetic algorithm with evolution strategy. The genetic algorithm with evolution strategy finds the control gain by changing the evolution region of chromosome. Finally, an application example of stabilizing a cart-pole typed inverted pendulum system will be given to show the stabilizability of the fuzzy controller.