• Journal of the Korean Institute of Telematics and Electronics
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• v.3 no.1
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• pp.3-11
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• 1966

An optimum pattern control procedure for the TV, FM broadcasting antennas being constructed in Seoul & Pusan is described. For the pattern control, 4 antenna elements were romoved from Seoul toward Inchen. Resulting pattern was measured and compared to the results of theoretical value. Similar results were obtained for Pusan antenna.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.4
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• pp.469-474
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• 2014

Installed on telephone poles laid scrambling to monitor the status of the communication lines, and cost information can provid eadditional information tools to develop systems to support on-site monitoring. Aerial support for a maintenance monitoring module to apply an embedded system, and information processing applications manufactured. In this study, a comprehensive plan in accordance with the government's aerial maintenance work to prevent accidents spread support for the device to immediately take advantage of big cities and aerial maintenance business, Construction worker accused of bias and aims to improve efficiency of maintenance puts.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.04a
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• pp.443-447
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• 2010

본 연구에서는 우리나라의 소 중 대형 산불의 공중진화 방화선 구축형태에 대하여 제안하였다. 산불확산은 현장의 지세, 경사, 바람, 수종 등에 영향을 받으므로 공중진화 방화선을 구축할 때에는 연소방향 및 형태, 강도 등을 분석한 후 진화작업을 실시하여야 하며, 공중진화 방화선 형태를 A형에서 M형까지 13개로 제안하였다.

• Fire Science and Engineering
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• v.24 no.5
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• pp.26-31
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• 2010

In this study, attack process and aerial control line construction type which were considered forest fire type and a case of operations were suggested using the experience of aerial fire attack of all type of forest fires. As the spread rate of forest fire is effected by terrain, slope, wind speed, forest species and etc., we needed to analyze spreading direction, behavior type and intensity before heli-team constructed a aerial control line. Especially, It is important to consider safety of attack team as a their views were obstructed. In this study, we suggested a 13 methods from type A to type M about attack and construction of aerial indirect control line.

• JOURNAL OF ELECTRICAL WORLD
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• s.437
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• pp.30-34
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• 2013

• 대한방사선방어학회:학술대회논문집
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• 2009.04a
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• pp.190-191
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• 2009

• Journal of the Korean Institute of Telematics and Electronics
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• v.2 no.2
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• pp.23-29
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• 1965

• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.128-129
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• 2008

전력거래 계량시스템은 회원사의 계량기가 생성한 계량데이터로부터 계량값을 산출하고 각 계량기의 특성을 관리하며, 정산금 지급을 위한 시간대별 계량값을 정산시스템에 전송하는 기능을 수행한다. 또한 정보공개 시스템과 연계하여 회원사 계량값을 공개하는 전력거래 핵심 시스템이다. 현재 계량데이터 취득 방식은 전용선 및 공중선에 기반한 유선방식 위주이며, 향후 CDMA 통신망을 활용한 계량시스템을 구축하여 IT 무선기술을 계량체계에 도입할 예정이다.

• Polymer(Korea)
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• v.36 no.3
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• pp.344-350
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• 2012

New pressure sensitive adhesives (PSAs) for polarizer film were prepared by electron beam (e-beam) radiation to acrylic copolymers, and their adhesive properties were investigated. The acrylic copolymers were synthesized by free radical polymerization of $n$-butylacrylate (BA), 2-hydroxyethyl methacrylate (HEMA), and acrylic acid (AA). The acrylic copolymers were coated on PET release films to a thickness of 25 ${\mu}m$, laminated to polarizer films, and then radiated with e-beam at room temperature. Gel fractions of all the acrylic copolymers after e-beam radiation at 50 kGy were higher than 93%, and their crosslinking densities were increased with increasing the content of HEMA units. PSA prepared by e-beam radiation of acrylic copolymer synthesized with a feed ratio of BA/HEMA/AA = 89.5/10/0.5 (w/w/w) at a dose of 50 kGy exhibited the best adhesion performances in terms of peel strength, creep resistance, durability and reliability, and light leakage. It is expected that the preparation method of PSAs via e-beam irradiation will improve the producibility and workability of polarizer film for liquid crystal display.

• 전기의세계
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• v.14 no.1
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• pp.13-25
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• 1965

A super gain antenna relating to TV & FM broadcasting for Seoul area is designed and manufactured. It is analyzeied with the equivalent circuit, and then manufactured according to the design method. Some practical measurements pertaining to various characteristics of the antenna have been accomplished and shown us good results.