• Journal of Advanced Navigation Technology
• /
• v.19 no.5
• /
• pp.417-422
• /
• 2015

A service size of the IoT environment is determined by the number of sensors. The number of sensors increase means increases the amount of data generated by the IoT environment. There are studies to reliably operate a network for research and operational dynamic buffer for data when network congestion control congestion in the network environment. There are also studies of the stream data that has been processed in the connectionless network environment. In this study, we propose a sensor gateway for processing big data of the IoT environment. For this, review the RESTful for designing a sensor middleware, and apply the double-buffer algorithm to process the stream data efficiently. Finally, it generates a big data traffic using the MJpeg stream that is based on the HTTP protocol over TCP to evaluate the proposed system, with open source media player VLC using the image received and compare the throughput performance.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2007.06a
• /
• pp.121-124
• /
• 2007

This paper describes the development of a brickwork game with three-dimensional computer graphics as one of web-based game contents. Client user using web can access and run lava applet program with the independence of hardware system. It consists of graphic user interface module, initial space generation module, event handler module, player control module, and thread control module. It uses 3-D array data structure for the 3-D graphic objects that are located in three-dimensional space for high-speed object searching and sorting. It enhances to compare with predetermined construction in three-dimensional space. We can use the developed racing game to inform game users of information for an advertisement like tourism information, and can apply the proposed 3-D drawing technology to 3-D game graphic engine core.

• Convergence Security Journal
• /
• v.9 no.2
• /
• pp.79-84
• /
• 2009

Recently, Move Picture Files have the same file format and a compression technique as Window Media Video form. but Moving Pictures using file format and a compression technique have question about Motion blur and compressibility. In this paper, we design and Implement for new Move Picture Solution EZ-MOV using FLV different from developed FLV(Flash Video) in the Macromedia company. EZ-MOV have advantages as follow. first, FLV player is able to compact disk access time and DRM (Digital Rights Management) with a built-in self and unable to an illegal video recording, second, whenever WMV formal file encoded FLV are able to lossless compression to fifty percent, third, FLV is able to Moving Picture streaming no buffering. fourth, FLV file is able streaming service no streaming server. fifth, FLV file is able to streaming service keep pace with download and streaming. sixth, FLV file is able to full duplex service.

• Journal of Korea Game Society
• /
• v.6 no.3
• /
• pp.13-22
• /
• 2006

Games such as sports, RTS, RPG, which teams of players play, require advanced artificial intelligence technology for team management. The existing artificial intelligence enables an intelligent agent to have the autonomy solving problem by itself, but to lack interaction and cooperation between agents. This paper presents "Level Unified Approach Method" with effective role allocation and autonomy in multiagent system. This method allots sub-goals to agents using role information to accomplish a global goal. Each agent makes a decision and takes actions by itself in dynamic environments. Global goal of Team coordinates to allocated role in tactics approach. Each agent leads interactive cooperation by sharing state information with another using Databoard, As each agent has planning capacity, an agent takes appropriate actions for playing allocated roles in dynamic environments. This cooperation and interactive operation between agents causes a collision problem, so it approaches at tactics side for controlling this problem. Our experimental result shows that "Level Unified Approach Method" has better performance than existing rental approach method or de-centralized approach method.

• The Journal of the Korea Contents Association
• /
• v.11 no.2
• /
• pp.152-161
• /
• 2011

The FPS, featured with high quality graphic of superior visual reality, is steadily growing because of the improvement of computer performance and technological advancement of game production. But most of the FPS games provide monotonous freedom with which players can only change the weapons in one character and this will make users lose their interests when playing games for long hours. Valve has introduced 'Team Fortress Classic' in 1999, in order to change the monotonous game methods. This game has attracted great attention because of the composition of various and unique characters through the introduction of military specialty system: that is the first trial in the history of FPS game. I, by analyzing this using MBTI, intend to analyze how much of immersion and interest the characters of various military specialties can provide to players when FPS games are developed.

• Journal of Korea Multimedia Society
• /
• v.10 no.3
• /
• pp.325-334
• /
• 2007

In order to increase the promotion of multimedia processing techniques in MPEG standard, MPEG Multimedia Middleware (M3W) which supports middleware interface for multimedia processing is set up. In this paper, multimedia protection and management service interfaces based on MPEG Multimedia Middleware (M3W) are introduced. The service interfaces are based on component models of M3W and support normative IPMP messages. The proposed interfaces are composed of Tool interfaces and Trust management interfaces: Tool interfaces provide the functionality supporting terminal and tool based on the governed decoder model and Trust management interfaces provide the supporting functionality such as license managing and authentication required in DRM devices. As an application of the proposed interfaces, a JAVA based player simulator is shown. The proposed interfaces can be easily implemented under various device and application environments as an ISO/IEC 23004-2 standard middleware platform.

• KIISE Transactions on Computing Practices
• /
• v.21 no.3
• /
• pp.257-262
• /
• 2015

As software grows more complex, it contains more bugs that are not recognized by developers. Attackers can then use exploitable bugs to penetrate systems or spread malicious code. As a representative method, attackers manipulated documents or multimedia files in order to make the software engage in unanticipated behavior. Recently, this method has gained frequent use in A.P.T. In this paper, an automatic analysis method to find software security bugs was proposed. This approach aimed at finding security bugs in the software which can arise from input data such as documents or multimedia. Through dynamic taint analysis, how input data propagation to vulnerable code occurred was tracked, and relevant instructions in relation to input data were found. Next, the relevant instructions were translated to a formula and vulnerable input data were found via the formula using an SMT solver. Using this approach, 6 vulnerable codes were found, and data were input to crash applications such as HWP and Gomplayer.

• Journal of Korea Game Society
• /
• v.17 no.4
• /
• pp.63-70
• /
• 2017

It has been a year since the $Pok{\acute{e}}monGo$ has been released. Over the past year, the $Pok{\acute{e}}monGo$ have become a social phenomenon. This study analyzes the dual characteristics play of the original $Pok{\acute{e}}mon$ game. The Pocket Monster game, which has both casual and hardcore capabilities, has a broader player base and enjoys popularity for 20 years, satisfying the requirement of easy and convenient access, which is an advantage of casual games. In addition, the rating battle system of $Pok{\acute{e}}mon$ game turns casual play into hardcore play. In this paper, we analyze the dual play characteristics of longevity games such as Pocket Monsters, and propose strategies and directions for game development that can survive long term in the competitive game market.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2014.07a
• /
• pp.499-502
• /
• 2014

본 논문에서는 'M-virus'게임의 설명과 작업자들의 제작의도를 보여준다. 'M-virus'는 '꿀사주세요'팀의 졸업 작품 게임으로 딸의 감염을 치료하기 위해 숙주를 찾는 아버지의 스토리를 기반으로한 3인칭 액션게임이다. '캐릭터 변이'를 특징으로 플레이어의 성향에 따라 캐릭터를 자유자재로 바꿀 수 있으며 캐릭터마다의 고유 스킬로 다양한 플레이를 경험할 수 있다.

• The KIPS Transactions:PartD
• /
• v.14D no.7
• /
• pp.719-726
• /
• 2007

Recently, NAND flash memory has been used for a storage device in various mobile computing devices such as MP3 players, mobile phones and laptops because of its shock-resistant, low-power consumption, and none-volatile properties. However, due to the very distinct characteristics of flash memory, disk based systems and applications may result in severe performance degradation when directly adopting them on flash memory storage systems. Especially, when a B-tree is constructed, intensive overwrite operations may be caused by record inserting, deleting, and its reorganizing, This could result in severe performance degradation on NAND flash memory. In this paper, we propose an efficient buffer management scheme, called IBSF, which eliminates redundant index units in the index buffer and then delays the time that the index buffer is filled up. Consequently, IBSF significantly reduces the number of write operations to a flash memory when constructing a B-tree. We also show that IBSF yields a better performance on a flash memory by comparing it to the related technique called BFTL through various experiments.