• 정보화사회
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• s.89
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• pp.29-31
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• 1995

정보통신 관련 박랍회로는 세계 최대규모인 "CeBIT '95"를 통해 초고속정보통신기반구축을 위해 부산한 움직임을 보이고 있는 국내 정보통신산업의 현주소를 점검한다.

• 정보화사회
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• s.149
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• pp.40-45
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• 2001

지난 3월은 세계적인 업체들이 한 자라에 모여 저마다 자신의 기술을 뽐내는 기회가 많았던 달이었다. 미 통신기기협회(The Celluar Telecommunications & Internet Association) 주관으로 열리는 ‘2001 CTIA Wireless 쇼’는 예년과 달리 IBM, 컴팩 컴퓨터(Compaq Computer), 썬 마이크로시스템즈(Sun Microsystems) 등 세계적인 컴퓨터 및 반도체 업체까지 대거 참가함으로써 세계 최대규모의 전시회로 부각되고 있다. 또한 "CeBIT-Center for Office and information Technology(사무 자동화, 정보 기술 및 텔레커뮤니케이션 관련 세계 비즈니스 박람회)“ 역시 지난 3월에 세계적인 정보통신기기업체들이 마음껏 자신의 신기술을 뽐내는 자리를 마련했다.정보통신 강국을 향해 끊임없이 노력하고 있는 국내 업체들에게 전시회 리뷰는 좋은 정보가 될 것이다. 지난 3월 21일부터 22까지 미국 라스베가스 Sands Expo & Venetian hotel에서 열린 “CTIA Wireless 2001”과 또한 22일부터 28일 까지 독일 하노버에서 열린 ‘CeBIT 2001 HANNOVER"에서 대한 자료들을 정리, 싣는다.

• Proceedings of the Korean Magnestics Society Conference
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• 2011.12a
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• pp.101-101
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• 2011

The control of magnetization by an electric field at room temperature remains as one of great challenges in materials science. Multiferroics, in which magnetism and ferroelectricity coexist and couple to each other, could be the most plausible candidate to realize this long-sought capability. While recent intensive research on the multiferroics has made significant progress in sensitive, magnetic control of electric polarization, the electrical control of magnetization, the converse effect, has been observed only in a limited range far below room temperature. Here we demonstrate at room temperature the control of both electric polarization by a magnetic field and magnetization by an electric field in a multiferroic hexaferrite. The electric polarization rapidly increases in a magnetic field as low as 5 mT and the magnetoelectric susceptibility reaches up to 3200 ps/m, the highest value in single phase materials. The magnetization is also modulated up to 0.34 mB per formula unit in an electric field of 1.14 MV/m. Furthermore, this compound allows nonvolatile, magnetoelectric reading- and writing-operations entirely at room temperature. Four different magnetic/electric field writing conditions generate repeatable, distinct M versus E curves without dissipation, offering an unprecedented opportunity for a multi-bit memory or a spintronic device applications.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.6A
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• pp.683-689
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• 2004

The power and bandwidth efficient constant-envelope BPSK (CE-BPSK) modulation is proposed. The CE-BPSK signal is realized specifying the phase transition characteristics for the conventional low pass filtered BPSK signal. Since the CE-BPSK signal has constant envelope and modified waveform, the CE-BPSK signal has better power and bandwidth efficiency compared to the conventional BPSK signal while the CE-BPSK signal is backward compatible to the conventional BPSK signal. It is also shown that the bit error rate performance of the CE-BPSK signal is the same as that of the conventional BPSK signal.

• Proceedings of the Korean Magnestics Society Conference
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• 2012.05a
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• pp.28-28
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• 2012

• Journal of Korean Electronics
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• v.23 no.4
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• pp.29-30
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• 2003

• Journal of Korean Electronics
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• v.24 no.4
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• pp.34-36
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• 2004

• Journal of Korean Electronics
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• v.25 no.3
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• pp.33-34
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• 2005

• Journal of Korean Electronics
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• v.21 no.11
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• pp.74-77
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• 2001

• Journal of Korean Electronics
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• v.21 no.10
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• pp.29-32
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• 2001