• Journal of Korea Game Society
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• v.8 no.1
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• pp.79-90
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• 2008

This paper describes a motivation-based hierarchical behavior planning framework to allow autonomous agents to select adaptive actions in simulation game environments. The combined behavior planning system is formed by four levels of specification, which are motivation extraction, goal list generation, action list determination and optimization. Our model increases the complexity of virtual human behavior planning by adding motivation with sudden and cumulative attributes. The motivation selection by probability distribution allows NPC to make multiple decisions in certain situations in order to embody realistic virtual humans. Hierarchical goal tree enhances the effective reactivity. Optimizing for potential actions provides NPC with safe and satisfying actions to adapt to the virtual environment. A restaurant simulation game was used to elucidate the mechanism of the framework.

• The Journal of the Korea Contents Association
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• v.6 no.11
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• pp.126-134
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• 2006

The object oriented co-modeling methodology, previously introduced, employs a layered approach in war game models development in which an upper layer models abstract behavior of an object and a lower one models details of the object. Within the methodology military domain experts and simulation experts models an object at the upper and the lower layers, respectively in concurrent manner. This paper proposes a method of constructing a war game simulator using parametric behavior modeling technique, which provides a means for military domain experts/users to change model's detailed behavior with no knowledge on modeling semantics. The proposed simulator would support new algorithms or strategies with minimal cost and could be modified even by the users who are ignorant about modeling technique. To demonstrate the effectiveness of the proposed framework, a naval war game simulator is exemplified.

• Journal of Korea Game Society
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• v.18 no.4
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• pp.65-74
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• 2018

As commercial game engines become available to the public, attempts have been made to use it for general purpose research. This study uses the game engine to develop a medical simulation. Specifically, when the user selects an important portion of the human body, the focus+context visualization is applied to the volume data. We proposes the accumulation based method to make the background part more transparent and naturally fuse it with the focus part. Since the proposed method combines well with the existing volume visualization, the virtual surgery function such as incision is performed smoothly. The game engine is useful for general-purpose research, because auxiliary functions such as collision handling and UI can be efficiently created with the help of it.

• Journal of Korea Game Society
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• v.11 no.6
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• pp.159-170
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• 2011

It seems that social distrust toward morality of video games has not been deducted even the influence of video game has increased drastically for last few decades. To rationalize the identity of video game and its social legitimacy, this paper first considered video game genre as a new art form. By doing so, we could derive various aesthetical and moral issues to dispute in modern society. Secondly, by considering former issues, this study could figure out moral vulnerabilities of the genre according to its own form, by categorizing them into virtual reality, interactivity and simulation. To suggest most effective way to overcome its immorality by functionalize social feedbacks which elaborately designed based on John Dewey's pragmatist aesthetics and immoralism.

• Journal of Korea Game Society
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• v.15 no.5
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• pp.49-56
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• 2015

As the popularity of casual games, they are increasing the needs to satisfy personal dispositions and the gameplay requirements of the various users in the game development process. These require analysis of action patterns of gameplay of various users in the testing phase of the game development. In this paper, we propose a method to analyze action patterns of gameplay through Petri net model simulation with gameplay metrics data. The proposed method has practical simulation environments because of using gameplay metrics data, and it can analyze diversely like reachability, coverbility, and liveness given by Petri net model analysis. An application example of the proposed method using a Petri net modeling tool GPenSIM v4.0 is given to analyze the patterns of gameplay in game Pacman. The results of simulations is presented. The presented results show that the proposed method can analysis patterns of gameplay diversely.

• Journal of the Korean Operations Research and Management Science Society
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• v.3 no.2
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• pp.41-45
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• 1978

Duel models are frequently used in war game simulation. Both game-theoretic approach and stochastic approach are applied to duel situations in war game. Game-theoretic models are usually classified into three categories, noisy duel, silent duel, and duel of continuous firing. Stochastic duels are classified depending upon assumptions. In this paper formulation and a general solution for each model will be summarized.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.52 no.11
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• pp.668-674
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• 2003

The electric marketplace is in the midst of major changes designed to promote competition. No longer vertically integrated with guaranteed customers and suppliers, electric generators and distributors will have to compete to sell and buy electricity. Unit commitment (UC) in such a competitive environment is not the same as the traditional one anymore. The objective of UC is not to minimize production cost as before but to find the solution that produces a maximum profit for a generation firm. This paper presents a hi-level formulation that decomposes the UC game into a generation-decision game (first level game) and a state(on/off)-decision game (second level game). Derivation that the first-level game has a pure Cournot Nash equilibrium(NE) helps to solve the second-level game. In case of having a mixed NE in the second-level game, this paper chooses a pure strategy having maximum probability in the mixed strategy in order to obviate the probabilistic on/off state which may be infeasible. Simulation results shows that proposed method gives the adequate UC solutions corresponding to a NE.

• Journal of Korea Multimedia Society
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• v.9 no.5
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• pp.635-648
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• 2006

As the advances of Internet infra structure and the support of console and mobile for network games, the industry of online game has been growing rapidly, and the online game traffic in the Internet has been increasing steadily. For design and simulation of game network, the analysis of online game traffic have to be preceded. Therefore a number of papers have been proposed for the purpose of analyzing the traffic data of network games and providing the models. We make and use GameNet Analyzer as a dedicated tool for game traffic measurement and analysis in this paper. We measure the traffic of FPS Quake 3, RTS Starcraft and MMORPG World of Warcraft (WoW), and analyze the packet size, packet IAT(inter-arrival time), data rate and packet rate according to the number of players and in-game behaviors. We also present the traffic models using measured traffic data. These analysis and models of game traffic can be used for effective network simulation, performance evaluation of game network and the design of online games.

• Journal of Korea Game Society
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• v.17 no.2
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• pp.165-174
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• 2017

This research was conducted to find out determinant variables which can influence the degree of flow in smoking simulation game. We set up flow experience as a dependent variable. Several factors including empathy, health concern, and brainwave(${\alpha}$, ${\beta}$) EEG(Electroencephalogram) as a physiological indicator, which was expected to affect flow, were set up as independent variables to perform regression analysis. As a result, empathy, health consciousness, and ${\beta}$ wave had positive influences on flow in smoking simulation game but ${\alpha}$ wave had negative effect. This research empirically analyzed users' experience and neurophysiological changes which can influence on flow in serious game and contributed to theoretical and methodological development in health-related game research.

• Proceedings of the Korea Society for Simulation Conference
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• 2001.05a
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• pp.54-54
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• 2001

인터넷으로 비롯된 신경제의 큰 특징중의 하나는 계층간의 격차 (Digital Divide)이다. 이러한 계층간의 격차는 인터넷의 특성인 Winner-takes-all 현상에 의해 일어나며 이는 확률적으로 Nonlinear Polya Game을 따르는 것으로 알려져 있다. 본 논문에서는 다양한 가정하에서 Nonlinear Polya Game의 행태를 분석해 보고 Digital Divide를 최소화시키거나 제거할 수 있는 방안을 모색해 보고자 한다. 또한 이러한 분석의 경제적이고 정책적인 의미를 제시해 보고자 한다.