• 소성∙가공
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• 제24권2호
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• pp.138-146
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• 2015

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2008년도 Asian Magnetics Conference
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• pp.256.1-256.1
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• 2008

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2008년도 Asian Magnetics Conference
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• pp.30.1-30.1
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• 2008

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2008년도 Asian Magnetics Conference
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• pp.50.1-50.1
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• 2008

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2011년도 추계학술발표대회
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• pp.483-484
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• 2011

본 내용은 이동성이 큰 해상 이동형 기지국 상에서 최적 라우팅을 하기 위해서는 이웃 기지국들 중 상대적으로 출력 정보 및 위치 정보와 같은 벡터 값이 가장 큰 기지국을 선택하는 방법과 같은 최적 조건을 찾는 최적 라우팅 방법이다.

• 한국경제지리학회지
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• 제7권1호
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• pp.83-96
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• 2004

본 연구는 우리나라의 대표적인 새로운 공업도시에 해당하는 광양시를 사례로 광양제철소의 입지와 관련된 기업활동이 지역의 인구변화에 미친 영향을 분석하였다. 지역의 인구변화를 파악하기 위해 광양제철소의 입지과정과 관련된 1981년부터 2001년까지를 연구기간으로 설정하였다. 광양제철소의 입지에 의해 광양시의 인구수는 1981년 78,478명에서 2001년 138,468명으로 증가하였고, 가구수 또한 1981년 14,917호에서 2001년 43,176호가 크게 증가하였다. 광양지역의 인구성장은 전입인구에 의한 사회적 증가에 의해 주도되었고, 광양제철소의 제1기 건설공사가 준공된 1987년부터 1991년 사이에 가장 현저하게 나타났다. 지역의 인구증가는 면부 지역을 제외한 광양읍과 동광양 지역에서 나타났고, 광양제철소가 입지한 동광양 지역에서 주로 발생하였다. 특히 동광양 지역의 인구는 1981년 13,211명에서 2001년 74,956명으로 크게 증가하였고, 광양시 전체 인구의 약 54.1%가 동광양 지역에 거주하고 있다. 전체적으로 보면, 1982년 광양지역이 광양제철소의 건설후보지로 결정된 이후, 지난 20년 동안 광양제철소의 입지와 기업활동은 광양지역의 인구구조 변화와 인구성장에 중요한 영향을 미친 것으로 분석되었다.

• Corrosion Science and Technology
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• 제17권2호
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• pp.74-80
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• 2018

The electronic industries require environmentally-friendly and highly functional materials to enhance the quality of human life. Home appliances require insect repellent steels that work to protect household microwave ovens from incurring damage by insects such as fire ants and cockroaches in tropical regions. Thus, POSCO has developed new types of functional steels, coated with an array of organic-inorganic hybrid composites on the steel surface, to cover panels in microwave ovens and refrigerators. The composite solution uses a fine dispersion of hybrid solution with polymeric resin, inorganic and a pyrethroid additive in aqueous media. The hybrid composite solution coats the steel surface, by using a roll coater and is cured using an induction curing furnace on both the continuous galvanizing line and the electro-galvanizing line. The new steels were evaluated for quality performances, salt spray test for corrosion resistance and biological performance for both insect repellent and antimicrobial activity. The new steels with organic-inorganic composite coating exhibit extraordinarily biological functionalities, for both insect repellent and antimicrobial activities for short and long term tests. The composite-coating solution and experimental results are discussed and suggest that the molecular level dispersion of insecticide on the coating layer is key to biological functional performances.

• Journal of Welding and Joining
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• 제24권6호
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• pp.39-43
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• 2006

A ferritic stainless steel, STS430, and a galvanized steel for case and frame of electronic goods are welded by resistance spot welding and resistance projection welding methods. In this study, resistance spot welding has been performed to investigate the weldability of dissimilar materials such as a ferritic stainless steel and a galvanized steel. Tensile load of the spot weld without heat treatment was 196 kN and brittle fracture occurred at interface between STS430 and nugget due to the high hardness, 380 Hv, in nugget. It was found that the hardness of as-welded nugget increased with higher cooling rate during resistance spot welding by comparing with GTA weld of same materials. Heat treatment by applying second current made nugget softened. Tensile load of heat treated weld increased and reached to 303 kN and fracture occurred at base metal, a galvanized steel.

• Journal of Welding and Joining
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• 제25권1호
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• pp.57-62
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• 2007

In the coarse grained HAZ of conventional TiN steel, most TiN particles are dissolved and austenite grain growth easily occurrs during high heat input welding. To avoid this difficulty, thermal stability of TiN particles is improved by increasing nitrogen content in EH36-TM steel. Increased thermal stability of TiN particle is helpful for preventing austenite grain growth by the pinning effect. In this study, the mechanical properties and microstructures of high heat input welded Tandem EGW joint in EH36-TM steel with high nitrogen content were investigated. The austenite grain size in simulated HAZ of the steel at $1400^{\circ}C$ was much smaller than that of conventional TiN steel. Even for high heat input welding, the microstructure of coarse grained HAZ consisted of fine ferrite and pearlite and the mechanical properties of the joint were sufficient to meet all the requirements specified in classification rule.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.504-511
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• 2010

After facing the fact such as fossil-fuel depletion, global warming, the Kyoto Protocol coming into force of mandatory reductions of carbon dioxide, the world is actively promoting the spread of the solar, wind, tidal, geothermal and other clean renewable energy technology development. Among them, wind power is the only alternative energy to secure a comparable price competition with fossil fuels because cheaper price power generation than other renewable energy when creating large-scale wind farm, thus wind power is the fastest growing industries in the world in the renewable energy field. Especially the offshore wind power is showing rapid growth as most of the wind power sector because of less changes of wind speed, no restrictions of land use, and large-scale development of offshore wind power. In this paper, the field of site selection and spatial location analysis techniques for development of large-scale offshore wind farm are discussed primarily. This paper shows overview of offshore wind power and establishment procedure for development of offshore wind farm.