• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.23 no.11
• /
• pp.34-43
• /
• 2009

SCADA (Supervisory Control and Data Acquisition) system has been used for remote measurement and control on the critical infrastructures as well as modem industrial facilities. As cyber attacks increase on communication networks, SCADA network has been also exposed to cyber security problems. Especially, SCADA systems of energy industry such as electric power, gas and oil are vulnerable to targeted cyber attack and terrorism Recently, many research efforts to solve the problems have made progress on SCADA network security. In this paper, flexible key distribution concept is proposed for improving the security of SCADA network using Multiagent System (MAS).

• Proceedings of the Korean Information Science Society Conference
• /
• 2006.06c
• /
• pp.136-138
• /
• 2006

정밀한 요구사항 분석과 다양한 전략의 응용을 통해 최대이익과 최소손해를 보장할 수 있는 게임이론 협상 프로세스를 제안하고, 그러한 프로세스가 지속되는 상호작용 속에서 보이는 한계점을 Win-Win 모델을 도입함으로서 보완하고자 한다. 또한 이러한 게임이론 보완 방법론을 통해, 이해관계자간의 지속적인 상호작용 속에서 꾸준한 이익을 보장할 수 있다는 제안의 타당성을 사례연구를 통해서 확인한다.

• ETRI Journal
• /
• v.34 no.2
• /
• pp.159-167
• /
• 2012

In this paper, a new distributed resource allocation algorithm is proposed to alleviate the cross-tier interference for orthogonal frequency division multiplexing access macrocell and femtocell overlay. Specifically, the resource allocation problem is modeled as a non-cooperative game. Based on game theory, we propose an iterative algorithm between subchannel and power allocation called distributed resource allocation which requires no coordination among the two-hierarchy networks. Finally, a macrocell link quality protection process is proposed to guarantee the macrocell UE's quality of service to avoid severe cross-tier interference from femtocells. Simulation results show that the proposed algorithm can achieve remarkable performance gains as compared to the pure waterfilling algorithm.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2017.05a
• /
• pp.722-723
• /
• 2017

In this study, we take into account in improving traffic flow in real-time problem. In order to solve the problem, we propose a new approach to manage traffic flow at the intersection in real-time via controlling by traffic light scheduling. In particular, the proposed method is based on process synchronization theory and connected vehicle technology where each vehicle is able to communicate with others. The traffic deadlock is also taken into consideration in case of high traffic volume. The simulation shows the potential results comparing with the existing traffic management system.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2003.05c
• /
• pp.1837-1840
• /
• 2003

국내의 게임제작사는 체계적인 게임제작을 위한 필수적인 정보 획득에 많은 어려움에 직면해 있는 실정이다. 이를 해결하기 위해서는 게임 제작에 요구되는 핵심 기술을 비롯한 제반 요소에 대한 연구 및 개발을 시행하고, 게임제작에 관한 정보와 기술을 제공하기 위한 체계적 지원활동과 지원체제의 활성화를 도모해야 한다. 이러한 해결책을 수행하기 위해서는 우선적으로 게임 제작을 지원하기 위한 체계적인 방안이 마련되어야 한다. 따라서 게임제작의 체계화, 즉 게임개발 및 관리를 위한 체계적인 공정을 정립하는 것이 절실히 요구되는 바이다. 본 연구는 ISO12207을 비롯한 기존 소프트웨어 개발 방법론 및 프로세스를 기반으로, 게임산업의 특성과 기술의 특징을 고려하여 게임제작에 적합한 프로세스를 정립하였다. 즉 일반 소프트웨어와 달리 게임만이 가지는 특성과 게임제작에 소요되는 다양한 기술을 고려하여 기존 소프트웨어 개발 방법론 및 프로세스를 게임 제작에 적합하도록 테일러링 함으로써 향후 게임제작의 효율성 및 생산성 향상에 기여할 것이다.

• Proceedings of the KSME Conference
• /
• 2001.06b
• /
• pp.146-151
• /
• 2001

The Grand-Touring is a game motion simulator that simulates the race-car driving motion with three hydraulic cylinders which connect the platform and base in parallel. Its motion control system consists of the PC-based main controller and micro-controller based sub-controller. The former one process the dynamic image of race-car in response to the driver's action and computes the reference command for each cylinder and the latter one is designed for the tracking control of hydraulic cylinder and interfacing the auxiliary signals between various sensors/actuator and main controller. In this research, we developed the sub-controller that implements the required functions of Grand-Touring and prove the overall performance with experiments.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2018.01a
• /
• pp.189-190
• /
• 2018

휴대폰에는 기본적으로 마이크가 탑재되어있다. 이것을 어플리케이션에 활용한다면 다양한 콘텐츠를 만들어 낼 수 있고 그러한 콘텐츠가 가진 가능성은 무궁무진 할 것이다. 게임 엔진을 사용하면, 제공되는 마이크 입력 클래스를 사용하여 마이크 입력 값을 가공할 수 있는데, 주변 잡음을 구분하지 하고 소리 입력 값을 받아들이는 문제가 발생한다. 본 논문에서는 기기에 탑재되어 있는 마이크에 접근, 각종 마이크가 출력하는 값을 얻어와 그 값을 가공하는 것을 분석하고, 주변 잡음을 구분하지 않고 받아들이는 문제를 해결하기 위하여 미리 주변 잡음을 체크하고 그 이상의 소리만 입력받도록 하는 방법에 대하여 연구하였다.

• ETRI Journal
• /
• v.43 no.1
• /
• pp.17-30
• /
• 2021

At present, multiple input multiple output radars offer accurate target detection and better target parameter estimation with higher resolution in high-speed wireless communication systems. This study focuses primarily on power allocation to improve the performance of radars owing to the sparsity of targets in the spatial velocity domain. First, the radars are clustered using the kernel fuzzy C-means algorithm. Next, cooperative and noncooperative clusters are extracted based on the distance measured using the kernel fuzzy C-means algorithm. The power is allocated to cooperative clusters using the Pareto optimality particle swarm optimization algorithm. In addition, the Nash equilibrium particle swarm optimization algorithm is used for allocating power in the noncooperative clusters. The process of allocating power to cooperative and noncooperative clusters reduces the overall transmission power of the radars. In the experimental section, the proposed method obtained the power consumption of 0.014 to 0.0119 at K = 2, M = 3 and K = 2, M = 3, which is better compared to the existing methodologies-generalized Nash game and cooperative and noncooperative game theory.

• Journal of Information Technology Applications and Management
• /
• v.28 no.6
• /
• pp.133-143
• /
• 2021

Unity's Cinemachine, one of the game production technologies, can produce 3D images. However, since Cinemachine is a game production tool, video creators may find it difficult because the work process of Cinemachine is unfamiliar and complicated. However, it is necessary to learn new technologies for the future of video contents that will be advanced in the future. In order to understand Chinemachine as a video producer, I would like to embody the scene of the movie. We are going to produce a storyboard scene for storytelling in Cinemachine. We defined the workflow of Unity Cinemachine while directing the scene by creating a story, and also checked the advantages and cautions. I hope it will be an opportunity to enjoy using Unity Cinemachine, which is constantly evolving.

• Journal of the Korea Society for Simulation
• /
• v.17 no.4
• /
• pp.61-69
• /
• 2008

In order to evaluate the performance of priority queues for future event list in discrete-event simulations, models representing patterns of enqueue and dequeue processes are required. The time complexities of diverse priority queue implementations can be compared using the performance models. This study aims at developing such performance models especially under the environment that a developed simulation model is used repeatedly for a long period. The developed performance model is based on multi-stage Markov process models; probabilistic patterns of enqueue and dequeue are considered by incorporating non-homogeneous transition probability. All necessary parameters in this performance model would be estimated by analyzing a results obtained by executing the simulation model. A case study with a war game simulation model shows how the parameters defined in muti-stage Markov process models are estimated.