• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.473-476
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• 2008

Mobile network environments are the environments where mobile devices are distributed invisible in our daily lives so that we can conventionally use mobile services at any time and any place. But, Mobile devices has a many security vulnerabilities caused by lower computing of devices and security problem of wireless network. So in this paper, PKI structure is proposed to minimize encrypting and decrypting operation by compounding session key and public key on WIPI environment. Proposed secure authentication system based on korean standard cryptography algorithm will give a more firmness in mobile network and support a more secure service for mobile academic information service that KISTI future plan.

• Journal of Game and Entertainment
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• v.2 no.2
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• pp.25-34
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• 2006

Game and Animation are considered as two different fields. The definition of animation is 'moving picture' and game is a kind of animation which can be controlled by users. Actually, many principles of animation are applied to the production of games, and are even more emphasized in the mobile game contents which are becoming popular these days because of the characteristics of mobile devices such as small screen size. In this paper, we study on the application of the 12 principles of animation through the making of a mobile 3D game called 'Fly to the music' and that game is going to be serviced in late 2006 by SK Telecom. Moreover, we studied the differences between 3d mobile game animation and ordinary animation.

• Journal of Korea Multimedia Society
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• v.7 no.2
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• pp.241-250
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• 2004

In this paper, an application layer protocol between sewer and client is proposed for mobile on-line contents in heterogeneous distributed environments. The proposed protocol guarantees the global state consistency in the distributed environments and controls the flow of communication. The protocol reduces the overhead of handsets for flow control and does not need to maintain state information for contents. CPs, by using the proposed sealable protocol, can easily develop their contents as application processes.

• Journal of the Korea Society of Computer and Information
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• v.9 no.4 s.32
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• pp.149-155
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• 2004

Current wireless internetservice of domestic five mobile communication companies are being limited to the service using markup-language. platform and Contents. Therefore, research on integration Contents of different Wireless internet platform and its development are necessary. For the easiness of maintenance and compensation. this paper attempts to design a Wireless internet Contents converter for integrate wired and wireless platform which automatically converts to WML and C-HTML through analysis of HTML document.

• Annual Conference of KIPS
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• 2014.11a
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• pp.591-592
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• 2014

Visitor 패턴은 구조 문제로 새로운 ConcreteElement 클래스가 추가될 때 Visitor 클래스 및 ConcreteVisitor 클래스를 수정해야 한다. 이 논문에서는 Visitor 패턴을 적용한 시나리오 생성기가 유연한 구조를 가지기 위해서 Visitor 패턴과 Composite 패턴을 병합하여 적용하는 기법을 제안한다. 그래서 시나리오 생성기에 ConcreteElement 클래스를 추가할 때마다 ConcreteVisitor 클래스의 멤버 함수를 유연하게 추가 및 삭제를 할 수 있는 클래스 구조를 제공한다.

• Journal of the Korea Society of Computer and Information
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• v.20 no.8
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• pp.93-104
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• 2015

In this paper, the design of intelligent_advertisement_operation system(IAdOS) based on user's feedback is proposed for mobile environments. The proposed system stores the advertising contents created by the advertising provider and recommends the personalized advertising contents by analyzing the context information, and then feedback information of the advertisements. Since the proposed system which can recommends provide the smart advertisement contents based on personal preference, it is expected to contribute the new service model development of in the field of advertising market.

• The Journal of the Korea Contents Association
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• v.8 no.9
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• pp.10-18
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• 2008

The most critical element in the real-time operation of RFID application programs that are suitable for the mobile environment is the RFID middleware, made exclusively for mobile handsets, which processes collected data on a real-time basis and sends only the useful information to the application client. In this paper, we intend to design and implement a mobile RFID middleware system that supports the mobile handset environment for real-time based processing of the necessary data in the mobile environment. The proposed mobile RFID middleware system includes a mobile reader interface that collects the tag data, a mobile filtering engine that processes the tag data into more meaningful data that is sent to the application interface, and finally the mobile application interface that supports the m-SOAP application access protocol for interfacing with existing mobile applications. The filtering speed of the newly-developed middleware engine was found to be suitable for the characteristics of mobile handsets.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.431-438
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• 2015

Smartphone is popularized, it is a lot of development of the mobile advertising industry, is born many types of mobile advertising. Many developers in the mobile game is the advertised profitable by using the SDK of service companies that service the advertising the launch of free games. Mobile IGA banner, front advertising, we use the ad in the three forms of the front video advertising, each of advertising, have advantages and disadvantages. Although many of the games currently use a full-page ad and front video ads, these ads profitable model is use the user game play time. In order to improve the disadvantage of this method, Commonly used to analyze the three ad revenue model, looking for the element, by using the research result of the previous studies, we have proposed a new advertising Convergence profitable models.

• The Journal of the Korea Contents Association
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• v.15 no.7
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• pp.353-367
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• 2015

From the era of feature phone to the current smart phone which bloomed Social Network Games(SNGs), mobile games have held the top position as killer contents of mobile market. Mobile game has many constraints such as specification of device, network status, and external environment. Based on common perspective of game research, these factors have negative influences on flow of user. Even with these opinions, most mobile gamers have felt satisfaction. To explain this phenomenon, our research focuses on the constraints. Referring to theoretical concepts, we attempt to clarify the relationship between game features and flow through survey methodology. Our finding shows that the constraints have a positive effect on flow even though it disaccords with previous studies. Therefore, we argue that users of mobile game have sense of satisfaction not a cognitive overload as discomforts.

• The Journal of the Korea Contents Association
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• v.17 no.1
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• pp.662-672
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• 2017

Recently, with the development of mobile devices and near field communication, mobile P2P networks have been actively studied to improve the limits of the existing centralized processing system. A peer has limited components such as batteries, memory and storage spaces in mobile P2P networks. The trust of a peer should be discriminated in order to share reliable contents in mobile P2P networks. In this paper, we propose a trust discrimination scheme considering limited resources in mobile P2P environments. The proposed scheme discriminates the trust of a peer by direct rating values using the rating information of the peer and indirect rating values by the other peers. The recent update time is included in the rating information. The proposed scheme reduces the redundant rating information by comparing the recent update times of the rating information. It is shown through performance evaluation that the proposed scheme reduces the number of messages and improves the accuracy of trust over the existing scheme.