• The Optical Journal
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• s.111
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• pp.40-44
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• 2007

한국광학기기협회는 한.일 광학협력기술사업의 일환으로 해마다 기술세미나, 기술지도, 기술연수 등 다양한 프로그램을 운영하고 있다. 올해에도 국내 광학업체에서 기술연수단을 구성하여 일본 'InterOpto 2007' 참관과 광학세미나 청강, 일본 광학회사 견학, '나노정밀 특수광학계 및 생산' 기술교육, '차세대 초정밀 광학부품 나노가공' 기술교육 등의 연수를 실시했다. 본 고에서는 주요 연수일정과 내용을 간략하게 정리해 보았다.

• Electronics and Telecommunications Trends
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• v.6 no.3
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• pp.187-202
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• 1991

CAD 프레임워크는 다양한 CAD 툴들의 이용법을 사용자 관점에서 통합하여 사용의 편이성과 설계 작업의 생산성을 높이고 CAD 시스팀 관리의 효율성을 높이고자 창안된 개념이다. 본 고에서는 CAD 프레임워크의 개념과 기능, 구성과 DEC 의 Power Frame을 예로 한 프레임워크의 형태와 발전 현황, 그리고 표준화 동향과 제 4세대 프레임워크를 중심으로 한 앞으로의 전망에 대해 살펴본다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.25-29
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• 2004

멀티미디어 및 인터넷의 기술의 발전과 더불어 브라운관 중심의 디스플레이 기술은 평판디스플레이 기술로 발전하였으며, 유비궈터스 및 디지털 컨버전스 기술의 발전은 무기물을 중심으로 한 평판디스플레이 기술로부터 유기물을 중심으로한 플렉서블 디스플레이 기술로 디스플레이 기술의 진화가 예상된다. 플렉서블 디스플레이는 90년대 후반 주로 저가형 수동구동 방식을 이용한 디스플레이를 중심으로 발전해 왔으나 현재에는 능동구동 방식을 이용한 디스플레이로 방향이 전환된 상태이다. (중략)

• 정보보호뉴스
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• s.127
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• pp.24-26
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• 2008

최근 인터넷전화(VoIP) 사용이 증가하고 있는 가운데, 지난 4월 7-8일 양일간 삼성동 코엑스에서 의미 있는 전시회가 개최됐다. KISA가 LG데이콤, 웨어플러스 등 3개 업체와 공동으로 지난 2006년부터 3개년 사업으로 추진하고 있는 VoIP의 정보보호 연구와 그 결과물인 정보보호 시스템 전시회가 그것이다. 특히 이번 전시회에서는 종단간(End to End) 보안통신을 지원하는 인터넷전화기기를 비롯해, 스팸 확산을 방지하는 VoIP 스팸 대응, VoIP 서비스망 보호를 위한 보안세션제어 시스템 등이 선보여, 차세대 IT 서비스로 주목받는 인터넷전화 서비스의 정보보호 수준을 한 단계 끌어올릴 것으로 평가받고 있다.

• Journal of Technology Innovation
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• v.24 no.4
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• pp.221-248
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• 2016

In this study, we conducted an in-depth literature review of the innovation characteristics of nuclear technology. We understood that the main issue may be a transition of fourth generation nuclear energy technology. We also analyzed a present status of Korean policy on nuclear energy technology and identified some implications for a successful settlement of the fourth generation nuclear energy technology. This study could provide some policy implications for maintaining the sustainable competitiveness of the fourth generation nuclear energy technology in Korea. According to our study, the factors that influence on a transition of nuclear energy technology are a policy-induced market for technical application and demonstration, stable and long-term resource allocation, constant interaction among stakeholders of innovation, accumulation of skill and know-how for an entire system. In addition, we conducted a case analysis on policy for Korean fourth generation nuclear energy technology. According to this case study, it would be necessary for Korea to pursue systematic training of human resources, active response to a social acceptance and reaction, establishment of specific plan for technical demonstration, long-term policy suggestion, and active promotion of constant interaction between stakeholders.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.7A
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• pp.730-737
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• 2007

The new wireless multimedia environment is coming because of the variety of an user requirement and a traffic increase which we can not accept in the IMT-2000 present systems. To offer the wireless multimedia service the world wireless communication company which included the ITU-R is developing the standard and technique of 4G systems. We analyzed the technique criteria of the 4G wireless communication system in this paper which is based on that of WiBro System. We referred to the technique criteria of the WiBro system and deduced an occupied frequency bandwidth which is the common element of the uplink and downlink system among main wireless communication technique criteria. And we verified this through the simulation. So we proposed the occupied frequency bandwidth for 4G wireless communication in this paper.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.3
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• pp.101-113
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• 2008

The new wireless multimedia environment is coming because of the variety of an user requirement and a traffic increase which we can not accept in the IMT-2000 present systems. To offer the wireless multimedia service the world wireless communication company which included the ITU-R is developing the standard and technique of 4G systems. We analyzed the technique criteria of the 4G wireless communication system in this paper which is based on that of WiBro System. The mobile communication traffic is predicted Up/Down-link of non-symmetric in the future. And we proposed the PHY layer parameters of occupied frequency bandwidth of Up/Down-link with both 1:3 and 1:6. And we verified this through the simulation. So we proposed the technique criteria for 4G wireless communication in this paper.

• Journal of Advanced Navigation Technology
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• v.17 no.1
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• pp.56-62
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• 2013

Recently with smart phones and tablets, next generation mobile communication systems have supported various multimedia contents services. Thus, multimedia communication systems have been gradually increased compared to voice communication systems. Since the growth of multimedia services has increased users' duration on systems and decreased systems' effectiveness on power, a study on effective usage of power needs to be researched. Furthermore, radio shadow areas under heavy urban environments have generated unnecessary power consumption which reduces the usage duration of power on next generation mobile communication systems. This paper has reviewed the communication network architecture on next generation mobile communication systems and the unnecessary power consumption in radio shadow areas. This paper has also proposed the method of the effective power usage and analyzed the effective power usage on next generation mobile communication systems with simulation.

• The Journal of the Acoustical Society of Korea
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• v.30 no.6
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• pp.337-343
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• 2011

With commencing trial 3D digital broadcasting, the studies on next generation digital broadcasting technology for coming UHDTV era is being actively progressing. In this paper, I propose surround audio formats for next-generation digital TV broadcasting, along with comparative study of major surround audio formats in use or under development. I did comparative study on current major competing surround formats such as Dolby True HD and DTS HD MA, along with NHK proposed 22.2 channel surround format for UHDTV system. Upon this comparative study and our housing situation consideration, I propose lossy compression 3D surround 7.1 channel surround format along with loosless 2.0 and 4.0 hi-fi format as next generation digital TV broadcasting standard. In lieu with this, I also propose transmitting binaural 2 channel audio data as sub-audio. It will give holographic sound experience when properly processed with individual HRTF (Head Related Transfer Function) with headphone. The table for data rate of each proposed audio format is also presented.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.44 no.6
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• pp.51-61
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• 2007

In this paper, Air-interface protocols of ISO 18000-6 Types and EPCglobal Classes applied to RFID system in UHF band are analyzed, and those anticollision algorithms are realized. Also, the each algorithm which improves the performance of standard protocol is proposed, and the performance is compared when clock period of link timing is a identical condition on $12.5{\mu}s$. As the result, when 500 tags exist simultaneously inside reader interrogation zone, the tag recognition performance of a standard protocol is better in preceding order of Class-1 Generation-1, Type B, Type A, Class-0 and Class-1 Generation-2. And also the performance of improved protocol is better in ascending order of Type B, Type A, Class-1 Generation-1, Class-0 and Class-1 Generation-2. Therefore, performance of tag recognition remarkably depends on the regulated clock period in the protocol and link timing between a reader and a tag.