• Korean Journal of Applied Biomechanics
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• v.15 no.1
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• pp.1-18
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• 2005

The purpose of this study was to evaluate performance characteristics. in the success of team attack during volleyball competition. For this, real game was analyzed using S-VHS video camera for three dimensional cinematography. The contents of this research were receive to set time, set to spike time, setter moving distance, ball position during set and attacker's relative ball position during jump and spike, and open area at spike. Among the various kinematical factors considered in this study, the ball height relative spiker and open area were found to be related to offensive performance. This finding implies that although their direct impact were not significant the other factors could have indirect impact on offensive performance by increasing open area. Thus, receiver, setter, assistant attacker, and main attacker should practice for successful performance in each stage. Lastly, it is necessary to develop kinematic variables to evaluate performance characteristics of players. Further study may consider the best defense position against the attack of the opponent player.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.33 no.4
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• pp.130-137
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• 2010

This paper analyzes the main factors affecting user selection of a small-sum electronic payment system using survey data of 396 users. Several findings emerge. First, users consider three pillars and eight factors in adopting a new system : system features(stability, security, and flexibility), transaction cost(payment commission and settlement period), and financial capability of provider(stability of financial structure, risk management capability, and funding capability). Second, the stability of the financial structure of the system provider is the most important factor to user acceptance of a new e-payment system. Users tend to consider uncertainty risk more seriously than transaction cost. This reflects the reality that electronic payment system service industry has not fully fledged yet. Third, some moderating effects exist according to payment methods and business usages. As for payment methods, speedy settlement cycle for wired/wireless phone payment, system stability for credit card and account transfer payment, and security for advance payment means are crucial factors. As for business usages, the stability of financial structure for online game content, system stability for music and video content, proxy payment commission for e-learning content, flexibility of the payment system for digital adult content, and security for public services are decisive ones.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.487-490
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• 2009

본 연구는 가정용 게임기를 이용한 재활 운동을 적용하여 뇌졸중 장애인의 보행능력에 효과가 있는 가를 알아보고자 하였다. 뇌졸중으로 6개월 이상 장애를 가진 32명이 연구에 참여하였고 게임운동군 16명과 대조군 16명으로 나누었다. 게임운동군은 가정용 게임기(PS2, sony)를 이용하여 1시간씩 주 3회, 6주간 실시하였다. 대조군은 운동의 적용 없이 평상시 생활을 유지하도록 하였다. 운동 전과 후에 보행능력을 측정하여 효과를 비교하였다. 통계처리 방법으로 전 후 차이를 검증하기 위하여 대응표본 t 검정을 실시하였고 대조군과의 차이 검증을 위하여 독립표본 t 검정을 실시하였다. 모든 통계적 유의 수준은 0.05로 하였다. 본 연구의 결과 보행능력에서 10m 보행속도가 유의하게 증가하였고(p<.05), 6분 보행거리도 유의하게 증가하였다(p<.05). 결론적으로 가정용 게임기를 이용한 재활운동이 뇌졸중 장애인의 보행능력에 효과가 있는 것으로 나타났다. 향후 뇌졸중 장애인에게 흥미를 유발하고 기능회복의 효과를 가진 게임형태의 재활운동이 다양하게 개발되어 적용하는 연구가 필요하다고 생각한다.

• Knowledge Management Research
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• v.16 no.4
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• pp.17-34
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• 2015

Mobile causal games have unique features differentiating itself with video or online games and a good understanding of user experience is important to save time, effort and money by focusing on key features. The purpose of this study is to empirically investigate relationships among flow experience, customer satisfaction, and customer loyalty in the context of mobile casual games. Fun, skillfulness, ease of use, instant connectivity, challenge were suggested as important characteristics of mobile casual games and included in the research model to see what factors might influence flow experience of mobile casual game users.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.7
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• pp.1458-1464
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• 2005

A P2P is a method that can share and exchange on digital resources through a direct connection on personnel without a central server. In this paper, Although the P2P application that uses our proposed framework should obtain one or more IP addresses of the neighbor peers manually, after instantiate, the application can do its job while maintaining connection to the network continuously and automatically. To evaluate our proposed scheme, we measured and analyzed the time for a peer to reconnect to the network when the mediating peer fails and the network isolation occurs.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.1
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• pp.129-137
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• 2010

There are a lot of multimedia functions getting included in mobile devices recently, not only simple audio but visual functions as well, such as video playing, game and web browsing. Such the visual multimedia functions brought the strong requirement for much bigger LCD Display and high resolution. And the brightness of LCD is also one of major requirements and it is required to be more bright. However, LCD brightness is limited to increase because of power consumption. It occupies nearly 30% of the whole system power. This thesis suggests an effective and simple method of adjusting the LCD backlight brightness, considering a characteristic of battery and user pattern.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2992-2998
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• 2013

The future mobile communication system can support not only voice but also multimedia applications such as data, image and video. It requires greater resources than the voice-oriented mobile system. We propose user and sub-channel priority based resource allocation for mobile multimedia services in the OFDMA systems. Our method is able to guarantee QoS continuity of realtime services and carry the maximum number of non-realtime subscriber. Simulation is focused on total throughput and blocking rate. The simulation results show that our proposed method provides a better performance than the conventional method.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.514-517
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• 2016

동영상이나 게임에서 2차원적인 시야를 제공해주는 물건(컴퓨터,TV,스크린 등)이나 입체감을 주기위한 3D기술을 사용하여 보는 것에 만족하던 시대가 가고 VR(Virtual Reality)이 등장함으로 인해서 사람들이 점점 가상현실에 대한 환상을 가지고 있다. 본 연구에서는 많은 관심을 받는 VR과 동영상 Converter기술을 합쳐 공포 게임을 만들어 보며, 일반적인 공포 영상이 VR과 접목되면서 가져올 감정변화가 사람들의 관심을 끌 수 있음을 보이고자 한다.

• Journal of the Korea Society of Computer and Information
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• v.5 no.2
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• pp.1-6
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• 2000

According as the Internet has expanded. technology of multimedia has developed, information has been expressed and provided in many ways, and users have been faced with various forms of data. However, data process probable has many problems from the developer's point of view. The Problem of compatibility caused by the different data structure in the media and multimedia such as sound, image, video and so forth. Even if they have the same structure requires the more task to the developers, makes developer work more. The object oriented theory has recently come to the fore as the effectual solution to this problem. This paper provides how to Proceed multimedia data more effectively by using inheritance and polymorphism, which come from the main concept of object oriented theory, and shows the example of then applied to the development of a game program.

• Proceedings of the KOSOMBE Conference
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• v.1995 no.05
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• pp.179-182
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• 1995

Although air, water, and noise pollutions have been widely recognized, electromagnetic forces(EMF) hazard has been rarely recognized as a pollution and very little studies has been done in this country. Thus, in this study electromagnetic forces radiated by various home appliances, once machines, and communication equipments were measured and so were several places radiating strong EMF such as subway stations and electric substations. Among the home appliances microwave oven senates lots of magnetic field and microwaves, and electric mattress does strong magnetic field. In video game room strong magnetic and considerable electric fields were measured. It was observed strong magnetic field inside of electric powered train and very strong magnetic and electric fields on some platforms. Hand-phone and car-phone radiate very hazardous level of microwaves to brain and that they rapidly come into wide use. In this study data base for various electric machines and places radiating strong EMFs were constructed and could be used for future epidemiological studies.