• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.3
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• pp.288-293
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• 2010

In these information-communication society, the wireless system technologies are increasing to do all things with wireless solution for fast and convenient works. This trend drives ubiquitous solutions which are based on broadband wireless network that gives network connection whenever, everywhere. This paper deals a bookshelf management system using plower line communication and RFID module. This system includes a 900 MHz RFID reader, Passive RFID-Tags, an Atmeg128 microprocessor board attached LED Display Module, and a management PC with GUI Software. This system works well in power line communication, tag reading and LED display, and PC Management Software.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.992-995
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• 2010

We propose an Power line communication, also known as Power line Digital Subscriber Line (PDSL), mains communication, power line telecom (PLT), or power line networking (PLN), or Broadband over Power Lines (BPL) are systems for carrying data on a conductor also used for electric power transmission. Power line communications can also be used to interconnect home computers, peripherals or other networked consumer peripherals. Specifications for power line home networking have been developed by a number of different companies within the framework of the HomePlug Powerline Alliance, the Universal Powerline Association and the HD-PLC Alliance.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.2064-2065
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• 2007

우리나라는 1960년대 이후 계속적인 경제성장에 따라 전력에너지의 수요도 끊임없이 증가하였고, 이후 꾸준한 전력계통의 설비 및 용량의 증가로 인해 현재에는 선진국 수준의 송전망을 구축하고 있으며, 765kV급 초고압 송전선로를 자체기술로 건설하여 운영하고 있는 상황이다. 향후 대용량 송전을 위한 초고압 송전계통 구성설비 증대가 계속 될 전망이다. 따라서, 전력의 신뢰도와 안전성 확보가 가능한 유지보수 방안이 필요 할 것이다. 특히 765kV 송전선로 고장시 전력계통에 미치는 영향은 막대할 것으로 사료되며 유지보수를 위해 휴전시 1일 수 억원의 발전제약비용이 발생 될 것으로 예상된다. 이에 765kV 송전선로의 휴전 없는 활선공법 활용의 필요성이 대두되고 있던 바, 산업자원부 전력산업연구개발사업으로 추진된 "초고압 송전선로 활선공법 및 관련장비 개발"(한국전기공사협회, 2006)과제가 성공적으로 개발되었고, 활선작업에서 중요한 직접활선작업원에 대한 전기적 안전성을 충분히 검토 분석되었다. (참고문헌 [1], [2], [3] 분석). 따라서 본 연구에서는 초고압 직접활선 기능을 보유할 수 있는 현장인력 양성을 위한 보다 효율적이고 안전한 교육 프로그램 개발 방안을 제시하고자 한다.

• Journal of Food Hygiene and Safety
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• v.16 no.1
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• pp.76-81
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• 2001

The germination test was used to detect biological changes in irradiated rice and glutenous rice at low doses. Grains were irradiated at below 0.5 kGy, husked and placed on distilled water moistend filter paper in a covered petri-dish. A germination test of 20 grains was carried out at room temperature for 5 days. The shoots and roots of non-irradiated rices grew well in comparison with those of irradiated rices above 0.3 kGy. The roots of rices were more sensitive to irradiation than the shoots, and the growth of roots was significantly decreased with the increasing doses. In glutinous rices, the growth of shoots and roots was retarded by irradiation at 0.2 kGy or more after 3rd days. We concluded that if the shoot or root length is 10 mm or longer within 5 day, the rices and glutinous rices are identified as non-irradiated.

• Journal of the Microelectronics and Packaging Society
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• v.21 no.3
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• pp.67-71
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• 2014

An attempt to grow high quality GaN on silicon substrate using metal organic chemical vapor deposition (MOCVD), herein GaN epitaxial layers were grown on various Si(111) substrates. Thin Platinum layer was deposited on Si(111) substrate using sputtering, followed by thermal annealing to form Pt nano-clusters which act as masking layer during dry-etched with inductively coupled plasma-reactive ion etching to generate nano-patterned Si(111) substrate. In addition, micro-patterned Si(111) substrate with circle shape was also fabricated by using conventional photo-lithography technique. GaN epitaxial layers were subsequently grown on micro-, nano-patterned and conventional Si (111) substrate under identical growth conditions for comparison. The GaN layer grown on nano-patterned Si (111) substrate shows the lowest crack density with mirror-like surface morphology. The FWHM values of XRD rocking curve measured from symmetry (002) and asymmetry (102) planes are 576 arcsec and 828 arcsec, respectively. To corroborate an enhancement of the growth quality, the FWHM value achieved from the photoluminescence spectra also shows the lowest value (46.5 meV) as compare to other grown samples.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.27 no.3
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• pp.130-134
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• 2017

In this study, numerical simulation was performed to focus on optimized process condition for obtaining a long-term growth and high quality SiC crystal. It could be optimized by considering the change of fluid and a carbon flow in the Si melt added with 40 % Cr. The Crystal Growth Simulator ($CGSim^{TM}$, STR Group Ltd.) was used as a numerical simulation. It was confirmed that many parameters such as temperature, rotation speed of seed crystal and crucible, and seed position during the crystal growth step had a strong influence on the speed and direction of solution flow for uniform temperature gradient and stable crystal growth. The optimized process condition for the solution growth of SiC crystal was successfully exhibited by adjusting various process parameters in the numerical simulation, which would be helpful for real crystal growth.

• 한국전자현미경학회:학술대회논문집
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• 2005.11a
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• pp.85-88
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• 2005

• Digital Contents
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• no.9 s.148
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• pp.69-71
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• 2005

국내의 이동통신 및 초고속인터넷 인프라와 자동차 산업의 경쟁력을 기반으로 2001년 국내에 첫 선을 보인 텔레매틱스 서비스는 이제 시장 도입기를 지나 초기 성장기에 진입하고 있다. 정부에서도 2003년 9대 신성장동력사업 가운데 하나로서 텔레매틱스 서비스를 선정하는 등 각종 시범사업, 기술 표준화 등을 시행하고 있고, 대기업에서 중소기업에 이르기까지 다수의 기업들이 상당한 자금투자와 기술개발로 텔레매틱스 성장을 이끌고 있다. 이처럼 텔레매틱스 서비스는 자동차업체, 이동통신사·콘텐츠 제공업체·단말기 업체 등 다양한 부문의 사업자들에게 신규투자 및 시장창출의 기회를 제공할 수 있다는 점에서 블루 오션 산업 중 하나로 꼽히고 있다.

• Applied Microscopy
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• v.6 no.1
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• pp.33-38
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• 1976

Formation of crystal defects which may occur during and after the vacuum deposition of silver films on rocksalt substrates were studied by electron microscopy. To obtain defect free films, various evaporation conditions, such as evaporation rate, substrate temperature, substrate treatments and annealing of films were examined. Stacking faults and micro-twins are dominant defects in silver films.

• The tire
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• s.245
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• pp.16-25
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• 2011

세계 경제가 회복세를 보이고 있으나 2011년 경제성장률은 금년보다 둔화될 전망이다. 2010년에 7,000만대 선을 회복한 세계 자동차 수요는 2011년에 전년비 8.8%가 증가한 7,580만대로 증가할 예상이다. 이에 따라 세계 타이어 수요도 높은 증가세를 나타낼 전망이다. 이하에서는 2011년 국내외 자동차산업의 환경 변화와 국내 자동차산업의 내수, 수출 및 생산을 전망해 본 후 이를 근거로 2011년 타이어 수출입을 전망해 보기로 한다. 또한 본격적인 FTA시대를 맞이한 타이어산업의 경영전략 방향에 대해서 살펴보기로 한다.