• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.895-896
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• 2015

With the development of sensor, wireless mobile communication, embedded system and cloud computing, the technologies of Internet of Things have been widely used in logistics, Smart devices security, intelligent building and o on. Bridging between wireless sensor networks with traditional communication networks or Internet, IoT gateway plays n important role in IoT applications, which facilitates the integration of wireless sensor networks and mobile communication networks or Internet, and the management and control with wireless sensor networks. The IoT Gateway is a key component in IoT application systems but It has lot of security issues. We analyzed the trends of security and privacy matters.

• The Journal of the Acoustical Society of Korea
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• v.23 no.3E
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• pp.74-78
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• 2004

As analog audio systems are changing to digital systems, the DAB (Digital Audio Broadcasting) is expected to provide CD quality audio, various data services with interactiveness and excellent mobile reception ability. The DMB (Digital Multimedia Broadcasting), as more advanced successor of the DAB, adds video capability on the audio and data services. The DAB system assures high quality audio services even when the reception is through portable and mobile receivers. In this paper, USB-DAB receiver and PCI-DMB receiver are designed and implemented. The DAB receiver and the DMB receiver incorporate with PC to make use of computational power and application software of Pc. This enables the developed system to be more flexible and to meet various applications easier.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.400-401
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• 2015

It is brought up the electric power shortage for particular dense population areas. Due to this, the high quality economical and eco friendly electric power facilities are needed. Also, the inconvenience of maintenance is significantly increasing in case of power cut and black out. For avoiding power failure of underground electric power facilities, the precise preventive maintenance is compulsory but there are apparent limitations. In this paper, the intelligent rail mobile system is described to overcome the limitations.

• 제어로봇시스템학회:학술대회논문집
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• 2000.10a
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• pp.60-60
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• 2000

CAN(Controller Area Network) is a serial communication protocol which specifies very low cost and high performance. It is widely used in rea1-time control applications such as automobiles, aircraft, and automated factories. The main application fields are industrial control systems and embedded network. In this paper, the CAN monitoring system is proposed and implemented. Also its performance is tested in the mobile robot which is integrated by CAN and its performance lot receipt failure rate is evaluated. This can be used to analyze the performance of the network. It can tie also used to manage and monitor the network.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.278-283
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• 2004

CTQ's choice is an important process for quality improvement. It is difficult to get customer satisfaction if CTQ is not chosen properly in view of improvement effort. However, case study or research about the supporting method for CTQ choice is not yet fully accomplished. In this paper, we propose an effective method for CTQ choice considering customer requirement through QFD as well as safety by using AHP which is one of strategic decision-making techniques for product safety. Also we show an empirical study on its application to the auto test robot system of mobile phone development.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.01a
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• pp.45-47
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• 2014

본 논문에서는 증강현실 기술을 응용하여 한정된 공간에서가 아닌 실제 세상에서 사람들과 상호작용할 수 있는 모바일 응용 프로그램 개발 전략을 클라이언트와 서버 단으로 나누어 설명하였다. ARToolKit이라는 오픈소스 라이브러리를 사용하여 증강현실을 구현하였으며, 클라이언트 시스템은 동시에 다수의 사용자가 상호작용을 하는 것을 이슈로 구현하였고, 서버 시스템은 클라이언트의 요청에 대한 신속한 응답처리를 위해 처리 과정에서의 의사 결정 단계를 최소화 시킨다는 것을 목표로 구현하였다.

• Vacuum Magazine
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• v.4 no.2
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• pp.24-28
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• 2017

Organic light-emitting diodes (OLEDs) have already been commercialized for the mobile-phone display, TV, and lighting panels. Even though the OLED display for the mobile phones is now considered as the main stream display for the application, the OLED TV and lighting panels are having difficulty in their market due to their high prices despite the better performance to the competitors. In recent years, roll-to-roll production of the OLED has begun to be examined, and this method is opening a way to solve the high price problem. In this article, we introduce several important processes for roll-to-roll production of OLED and explain the development status to date.

• Journal of Information Processing Systems
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• v.16 no.4
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• pp.896-914
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• 2020

With the rapid growth of network traffic, a large number of connected devices, and higher application services, the traditional network is facing several challenges. In addition to improving the current network architecture and hardware specifications, effective resource management means the development trend of 5G. Although many existing potential technologies have been proposed to solve the some of 5G challenges, such as multiple-input multiple-output (MIMO), software-defined networking (SDN), network functions virtualization (NFV), edge computing, millimeter-wave, etc., research studies in 5G continue to enrich its function and move toward B5G mobile networks. In this paper, focusing on the resource allocation issues of 5G core networks and radio access networks, we address the latest technological developments and discuss the current challenges for resource management in 5G.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.929-931
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• 2016

최근에 모바일 게임을 즐기는 이용자들이 증가하고 있다. 우리나라 뿐만 아니라 전 세계적으로 모바일 게임의 인기가 식을 줄 모르고 있는 가운데 블루오션이라 불리는 중국시장을 겨냥해서 게임이 개발되고 있다. 게임의 장르는 서바이벌(생존)게임인데, pc게임시장에서는 서바이벌게임이 상위권에 많은 반면 모바일시장에서는 서바이벌 장르의 게임의 비중이 적다. 뿐만 아니라 모바일시장에는 카피캣 게임이 대다수를 차지하고 있다. 본 논문에서는 틈새시장 공략하기 위해서 서바이벌(생존)게임을 기획하고 새롭고 참신한 독자적인 모바일게임을 개발에 대한 연구를 한다. 유비쿼터스 컴퓨팅 환경에서 다양한 접속 채널과 서비스 플랫폼에 대응하는 게임의 개발도 요구 되고 있는 상황에서 본 연구에서 개발된 게임은 좋은 사례가 될 것이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.864-867
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• 2016

In high speed railway system, LTE(Long Term Evolution) based LTE-R(LTE-Railray) mobile technology is used to supply various control signal required for safty operation of train. In this paper, railway communication technology be used in railway communication system based on LTE-R is investigated in focused on application services. Standardization trends for LTE-R technology are also considered. Results of this study can be used as basic data for research and development of LTE-R and railway mobile communication.