• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권7호
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• pp.3413-3430
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• 2017

With the fast increasing popularity of mobile services, ubiquitous mobile devices with enhanced sensing capabilities collect and share local information towards a common goal. The recent Mobile Crowd Sensing (MCS) paradigm enables a broad range of mobile applications and undoubtedly revolutionizes many sectors of our life. A critical challenge for the MCS paradigm is to induce mobile devices to be workers providing sensing services. In this study, we examine the problem of sensing task assignment to maximize the overall performance in MCS system while ensuring reciprocal advantages among mobile devices. Based on the overlapping coalition game model, we propose a novel workload determination scheme for each individual device. The proposed scheme can effectively decompose the complex optimization problem and obtains an effective solution using the interactive learning process. Finally, we have conducted extensive simulations, and the results demonstrate that the proposed scheme achieves a fair tradeoff solution between the MCS performance and the profit of individual devices.

• 한국정보컨버전스학회:학술대회논문집
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• 한국정보컨버전스학회 2008년도 International conference on information convergence
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• pp.125-128
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• 2008

The aim this master thesis is to find out if is possible to Integrate haptic hardware support in the source 3D game engine Crystal Space. Integrating haptic support would make it possible to get a haptic representation of 3D geometry in Crystal Space and therefore take advantage of all the benefits a 3D game engine provides, when building haptic applications, An implementation of the support should be as low-cost as Possible by taking advantage of available source haptic API alternatives. The thesis report presents an evaluation of available haptic APIs and comes up with a design and an implementation. The solution has been implemented as a Crystal Space plugin by using modified parts of the e-Touch open module API. The plugin makes it possible to utilize the Phantom haptic device to touch and feel the 3D environments in a Crystal Space application. Two demo applications have also been constructed to show the capabilities of the plugin.

• 한국중재학회지:중재연구
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• 제33권3호
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• pp.129-146
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• 2023

We construct a signaling game model between the arbitrator and claimants, in which the arbitrator's marketing amount is adopted as the signaling device. Assuming that the parties to the dispute select an arbitrator, and if there is a difference in the arbitrator's fee depending on the arbitrator's reputation, the arbitrator will pay to further enhance his reputation. We would like to analyze the cost differences between arbitrators who already have a high reputation and arbitrators who strive to further enhance their reputation using the signal model. From the Analysis of our study, We derive perfect Bayesian equilibrium of the signaling game and refine the equilibrium into a unique equilibrium by invoking the Intuitive Criterion of Cho and Kreps (1987). Further, we characterize the refined equilibrium.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2009년도 춘계 종합학술대회 논문집
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• pp.635-641
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• 2009

본 논문에서는 다양한 휴대형 단말기기의 플랫폼 친화적이며 컨텐츠 개발의 신속성, 확장성 및 용이성이 고려된 3D 컨텐츠 플랫폼 엔진과 Application Frame 기술을 Convergence하였으며, Mobile Device에 탑재 가능한 3D 그래픽 사용자 인터페이스(GUI)의 시제품을 제작 및 응용하고, Mobile Game 등 컨텐츠의 개발을 효과적으로 빠르고 쉽게 구현할 수 있는데 필요한 3D GUI 객체(widget) 및 툴킷을 포함하는 Frame을 표준화 하는데 기본이 되는 연구를 하였다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2023년도 제68차 하계학술대회논문집 31권2호
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• pp.365-366
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• 2023

메타버스는 점차 빠른 속도로 발전되며 응용 분야가 확대되고 있다. 스포츠 분야에서 다양한 메타버스 시도가 이루어지고 있으며, 축구, 야구, 농구 등 인기 종목에 대한 메타버스 구축 및 운영이 이루어지고 있다. 그러나 사용자의 새로운 경험을 이끌어 내기보다, 오프라인 대체 수단으로 활용되고 있다. 본 연구에서는 웨어러블 디바이스를 통해 사용자 생체 정보를 수집하여 메타버스에 적용 가능한 데이터로 가공하는 과정에 대한 연구내용을 기술한다.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 1부
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• pp.1-6
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• 2008

본 연구에서는 게임에서의 몰입도 증가를 위해 기존 버튼 방식의 입력에 사용자의 자연스러운 동작을 이용한 입력과 진동 촉감을 출력하는 게임 컨트롤러를 제안한다. 동작을 이용한 입력장치는 가속도 추적기와 적외선 비디오 카메라를 동시에 사용한다. 두 정보의 장단점을 보완/융합해서 컨트롤러의 움직임을 추적하고, 사용자의 동작을 인식한다. 다양한 종류의 진동촉감은 보이스코일 진동자를 이용하여 제공된다. 또한, 제안하는 게임 컨트롤러를 게임의 상호작용에 적용하는 방법을 제공하고, 응용 프로그램에의 적용가능성을 살펴본다.

• 한국게임학회 논문지
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• 제13권6호
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• pp.85-94
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• 2013

모바일 기기의 성능 향상과 사용자 증가에 따라 모바일 게임 시장이 확대되고 다양한 모바일 게임들이 등장하고 있다. 하지만 이와 더불어 최근 모바일 게임에 대한 다양하고 심각한 보안 위협들이 나타나고 있으며 이에 대한 대응방안 마련이 필요한 상황이다. 특히 안드로이드 환경에서 모바일 게임의 리패키징은 모바일 게임 사용자와 제작자 그리고 생태계에 심각한 문제를 야기시킨다. 본 논문에서는 축약된 인스트럭션 시퀀스를 이용하여 안드로이드 게임의 리패키징 여부를 탐지하는 기법을 제안하고 구현하였으며 실험을 통해 제안한 기법이 효과적으로 리패키징 여부를 탐지할 수 있음을 보였다. 제안한 기법은 축약된 인스트럭션 시퀀스를 이용하기 때문에 여러 제약사항이 많은 모바일 기기에 적용이 가능하며 이를 통해 다양한 경로에서 유입되는 리패키징된 앱을 탐지 및 차단하고 리패키징으로 발생하는 악성 앱의 확산과 불법복제를 예방할 수 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권9호
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• pp.4606-4623
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• 2019

Nowadays modern cities develop in a very rapid speed. Buildings become larger than ever and the interior structures of the buildings are even more complex. This drives a high demand for precise and accurate indoor navigation systems. Although the existing commercially available 2D indoor navigation system can help users quickly find the best path to their destination, it does not intuitively guide users to their destination. In contrast, an indoor navigation system combined with augmented reality technology can efficiently guide the user to the destination in real time. Such practical applications still have various problems like position accuracy, position drift, and calculation delay, which causes errors in the navigation route and result in navigation failure. During the navigation process, the large computation load and frequent correction of the displayed paths can be a huge burden for the terminal device. Therefore, the navigation algorithm and navigation logic need to be improved in the practical applications. This paper proposes an improved navigation algorithm and navigation logic to solve the problems, creating a more accurate and effective augmented reality indoor navigation system.

• International journal of advanced smart convergence
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• 제11권4호
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• pp.129-140
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• 2022

The purpose of this study to improve the shoulder wheel that is used frequently during shoulder circumduction exercise in a park, to link the shoulder wheel to a game application comprising various shoulder circumduction exercise and shoulder ROM exercise, and to enjoy the game during the exercises. A step motor was added to the shoulder wheel, and the rotating speed and rotating angle, and rotating direction can be controlled. The shoulder height, different for different people, can be controlled as well, so that any user can use this device. The developed application content includes the game elements, to enjoy the repetitive and boring exercise with fun and interest, and the control to adjust the degree of difficulty. This was to help users heighten their desire to rehabilitate by inducing active participation during repetitive shoulder rehabilitation exercise because the game vests users with intrinsic motivation and immersion. If the shoulder wheel and application contents proposed in this study are used, shoulder diseases can be prevented in advance by performing muscle strengthening exercises required in an aging society. This study is expected to contribute to the field of research related to serious games and rehabilitation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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• pp.78-80
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• 2005

Haptic interface apparatus is the device which can offer users virtual reality not only by visualization of virtual space but also by force or tactile feedback. In this paper, we designed and fabricated a 2D haptic interface device that can be used for various purposes, and implemented a virtual air-hockey system that users can easily find in game rooms. By suitable modeling and haptic rendering, users can feel the impact and the reaction force with his/her hand holding the handle through 2D haptic interface device when he/she hit an air-hockey puck with the handle. Through the trial demonstration. we observed the reasonable effect of direction and speed of a ball like doing in reality.