• 한국환경복원기술학회지
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• 제15권1호
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• pp.133-140
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• 2012

The study of Arundinaria munsuensis Y. Lee to this day was limited to the field of morphological species classification since its first discovery at Jiri mountain in the late 1990s. This native plants, one of Korean endemic species found in Jiri Mt. necessitates further studies about its use as revegetation plants or groundcover plants in urban areas. This study was launched from this need followed by summaries of results below related to its usage. This targeted species is a native Korean species which its natural distribution on the subalpine zone has merit for the wide range of climatic adaptation. Also, the coverage rate reached 78.3% in three years mostly by rhizome growth with an expectation of full coverage in four years providing less maintenance needs after planting. The net price for the construction of pot seedling methods of this plants is relatively economical than other normal revegetation construction methods. For these reasons, drilling for the plants on cut and fill soil slopes driven from pot seedling adapts Arundinaria munsuensis Y. Lee as efficient revegetation plant. Total construction cost for pot seedling work($30cm{\times}30cm$) of Arundinaria munsuensis was approximately 21,000won which is in reasonable price range when compared to other revegetation construction methods of disturbed slopes. As a native Korean plant, Arundinaria munsuensis has wide range of climatic adaptation with less maintenance requirement after planting. This study may suggest a strong possibility of Arundinaria munsuensis as a pot planting material in sloped area.

• 한국농공학회논문집
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• 제54권6호
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• pp.9-17
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• 2012

In 1960's, Korea had concentrated on economic development, in the meantime the existing problem which is an avoiding rural settlement phenomenon such as a farming population decrease, an unstabel income, poor surroundings, etc. could intensify. And because of an exodus from agricultural area caused by industrialization and a fall of agricultural farm price as a result of domestic agricultural market opening in accordance with FTA, in 2004 Korean government excuted the integrated rural-village development plan as a measure to provide more support for agricultural villages. The integrated rural-village development plan means that inter-connected with villages which have potnetial and developed it as a unit of small-zone, also we can assume it a Down-up development type because residents participate and lead this plan directly. But, this plan made progress rapidly as a countmeasure of government so, it needs to evaluate for completed project area and make an improvement for a sustainable undertaking. Therefore, this study categorized project contents systematically into two parts of Hardware and Software, after that composed of 4 large-parts, 13 mid-parts and 43 small-parts from Inje-Yongdai zone which was designated for an integrated rural-village development plan in 2004. And a result of analysis for project contents priorities by hierarchy analysis method showed the Regional capability reinforcement is selected for the most important project content by 3 stakeholders who are specialists (514pts.), Korea Rural Community Corporation staffs (694pts.), local government officers (688pts.)

• 한국해양공학회지
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• 제22권3호
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• pp.82-88
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• 2008

The diesel engine of the merchant ship has been aperated in severe environments more and more, because the temperature of the exhaust gas of a combustion chamber is getting higher and higher with increasing use of heavy oil of law quality, due to the significant increase in the price of oil in recent some years. As a result, the degree of wear and corrosion between exhaust valve and seat ring is more serious compared to other engine parts. Thus the repair welding of exhaust valve and seat ring is a unique method to prolong the life of the exhaust valve, from an economical point of view. In this study, the corrosion property of both weld metal and base metal was investigated using electrochemical methods such as measurement of corrosion potential, cathodic and anodic polarization curves, cyclic voltammogram, and polarization resistance in 5% H2SO4 solution. The test specimen was a part of an exhaust valve stem being welded as the base metal, using various welding methods. In all cases, the corrosion resistance as well as hardness of the weld metal zone was superior to the base metal. In particular, plasma welding showed relatively good properties for both corrosion resistance and hardness, compared to other welding methods. In the case of DC SMAW (Shielded metal arc welding), corrosion resistance of the weld metal zone was better than that of the base metal, although its hardness was almost same as the base metal.

• 대한기계학회논문집A
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• 제26권5호
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• pp.864-871
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• 2002

Acoustic emission(AE) technique has been applied to not only mechanical property testing but also on-line monitoring of the entire structure or a limit zone only. Although several AE devices have already been developed for on-line monitoring, the price of these systems is very high and it is difficult for the field to apply yet. In this study, we developed a specially designed PC-based leak detection system using A/D board. In this paper, AE technique has been applied to detect leak for heat exchanger by analyzing the characteristics of signal obtained from leak. It was confirmed that the characteristics of the signal generated by the turbulence of gas in the heat exchanger is narrow band signal having between 130-250kHz. Generally, the amplitude of leak signal is increased as the leak size increasing, but showed no significant change at frequency characteristic. Leak source location can be found by determining for the paint of highest signal amplitude by comparing with several fixed sensors. In this paper, AE results are compared with the PC-based leak detection system using A/D board.

• 한국농촌건축학회논문집
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• 제14권4호
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• pp.89-96
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• 2012

The purpose of the study is to identify land use characteristics which have influence on residents' mental health. Land use and housing types indicators including green areas and parks were selected by analyzing the related environment and health researches. Research database for every variable from 33 neighborhoods in Jeonju city were established through National Health Insurance Corporation, where is available for getting mental and behavioral disabilities (F code) expenses. The relation between those indexes and mental health were analysed. The findings of this study are as follows : First, the higher price area like apartments and raw houses the residents lived in, the more expenditure of F-code was paid. It could be interpreted by the relatively high frequency of medical treatment and interests on the health. Second, the more green area except park were there, the more F-code expenditure was given, which could be explicated with the spatial co-relation between location of green area and apartments of Jeonju city. It was very high, and apartment element's affect on the F-code was much more than the green zone. Third, the nearer to park were the residents, the less F-code expenses was paid.

• 한국식생활문화학회지
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• 제18권4호
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• pp.346-355
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• 2003

The purpose of this study was designed to analyze the food preference and behavior on food away from home between Korean, Japanese and Chinese. The sample was selected each 200 people who were waiting departure in duty free zone, Incheon International Airport. The survey was developed by researcher and it consist of four parts that demographic characteristic, preference food material, preference cooking method and behavior on food away from home. As a result of the study, korean preferred soup, pork and raw vegetable and dine out with their family. Japanese preferred soup, beef, salad and dine out by themselves. Chinese preferred meat, fish, sauteed vegetable, and dine out with their family. When they were dine-out, Korean frequently ate Korean food, Fast food, Japanese food and Chinese, however Japanese frequently ate Japanese food, Chinese food and Italian food. Chinese frequently ate Chinese food and Fast food. Korean were sensitive of food price, but Japanese were sensitive of food taste and Chinese were sensitive of new experience and taste.

• Journal of Advanced Marine Engineering and Technology
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• 제38권4호
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• pp.409-417
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• 2014

최근 수년 동안 유가의 현저한 상승으로 인하여 상선의 디젤 기관은 저질 중유를 주로 사용하게 되었다. 따라서 저질 중유의 사용 증가에 따른 디젤 기관의 연소실 배기가스 온도는 점차 상승하여 가혹한 부식 환경에 직면하게 되었다. 그 결과 연소실 주변의 모든 기관 부품들의 부식과 마모는 다른 기관 부품들에 비해서 심각하다. 그러므로 이들 부품들의 적절한 덧살 용접은 수명 연장을 위하여 경제적인 측면에서 매우 중요하다. 본 연구에서는 피스톤 크라운 재질로 통상 사용되는 단강에 4종류의 용접재료로 SMAW와 GTAW로 용접하였다. 실험은 모재, 열영향부 및 용접금속의 부식 특성을 35% 황산용액에서 부식전위, 양극분극 곡선, 사이클릭볼타모그램 및 임피던스 등의 전기화학적인 방법으로 하여 고찰하였다. Inconel 625, 718 용접재료의 경우 용접금속의 내식성이 가장 우수하였고, 모재의 내식성이 가장 좋지 않았으며, 반면에 1.25Cr-0.5Mo와 0.5Mo는 모재가 용접금속에 비해서 더 좋은 내식성을 나타내었다. 또한, 용접금속 중 Inconel 625가 가장 내식성이 우수하였으며, 그 다음으로 Inconel 718 용접재료로 나타났다. 경도 역시 용접금속이 상대적으로 모재, 열영향부에 비해서 높은 값을 나타내었다. 특히 Inconel 718 용접재료의 경우 다른 용접재료에 비하여 가장 높은 경도값을 나타내었다.

• 도시과학
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• 제11권1호
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• pp.49-57
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• 2022

Semi-industrial zone is the area where manufacturing, residential, commercial zones are mixed. Despite of their potentials in that proximity to city and convenient transportation infrastructure, a lot of semi-industrial zones in Korea have converted to other uses due to many issues such as change of industry, increasing land price, real estate speculations. Recently, local government is trying to solve their existing issues and develop them through a restoration of publicness. Now publicness is thought of as a key factor of regeneration in semi-industrial areas. In this regard, this study aims to examine the way of restoring publicness revealed in Brooklyn Navy Yard mainly focus on their urban contexts and architectural ways. Brooklyn Navy Yard, an exemplary case, is an industrial complex that has grown economically, socially and culturally through emphasizing publicness and it is evaluated as an advanced example of public industrial complex. Through the analysis of Navy Yard, this study was trying to emphasize the importance of publicness in the regeneration of semi-industrial areas and to provide implications for the Seoul Government's solutions, which are still in the conceptual stage. To analyze the publicness of the study subjects, framework and elements were derived by examining related theories and prior researches. Depending on this frame, the results of the publicness of the Navy Yard were as follows. First of all, the 'Publicness as an officiality' was identified at the characteristic of the site and Navy Yard development corporation. Second, the 'Publicness as a public interest' of the Navy Yard Development Corporation was identified in various ways of its operation methods. Finally, the 'Publicness as an accessibility' was identified in the opening of urban and architectural spaces in Navy Yard. These publicness were analyzed with seven Navy Yard's success factors. Thus, it can be interpreted that the publicness of the semi-industrial areas can contribute significantly to their success. The publicness restoring methods of Navy Yard could be used as a basic data in semi-industrial areas in the future in Korea. However they are limited to be applied directly, so extensive and in-depth research in terms of their applicability should be conducted.

• 유통과학연구
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• 제9권1호
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• pp.29-38
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• 2011

우리나라 대부분의 소매업태가 성장 또는 성숙단계에 머물고 있는 현재, 어떤 혁신적인 소매업태가 새로 출현하고 발전해 갈 것인가? 그리고 그 혁신적인 소매업태가 출현하고 발전해 갈 성장동력은 무엇인가? 본 연구는 이러한 문제인식에 근거하여 소매업태의 차별화경쟁과 소비자선택과의 상호행동을 연동하여 논의할 수 있는 소비자선택모델을 구축하여 혁신적인 소매업태의 출현과 발전과정을 분석하는 것이다. 본 연구에서의 분석결과는 다음과 같이 요약할 수 있다. 첫째, 소매시장에서 새로운 진공지대가 발생하면 그곳에 저가격·저서비스 또는 고가격·고서비스의 혁신적인 소매업태가 출현한다. 둘째, 진공지대에서 신규업태의 수가 많아지면 신규업태간의 수평적 경쟁이 야기되고, 이를 통해 각 신규업태는 격올림을 전개한다. 셋째, 신규업태가 격올림을 전개하면 신규업태와 기존업태간의 이업태간 경쟁이 야기되고, 이 경쟁에서 기존업태와 신규업태간의 동화과정이 전개된다. 넷째, 각 소매업태는 기존의 유통기술 프론티어를 돌파하기 위해 유통혁신을 추진하게 되고, 다른 소매업태는 그 혁신자를 추종한다. 위에서 언급한 분석결과를 근거로 하여 본 연구에서는 세가지 시사점을 제언할 수 있다. 첫째, 본 연구는 소매업태가 차별화전략을 추진할 때 사용되는 점포 속성에 대한 소비자의 의사결정과정구도에 대응하면서 최종적으로는 시장점유율의 변화와도 연동하여 논의할 수 있는 소비자선택모델을 구축하였다는 점이다. 둘째, 본 연구는 이러한 소비자선택모델을 토대로 혁신적인 소매업태의 출현과 발전과정에 대한 분석을 보다 정교한 논리 구조에 입각해서 설명하였다는 점이다. 셋째, 본 연구에서의 논의한 소매업태의 발전과정은 시장에서 경쟁우위를 획득하기 위해서 소매업태가 소매믹스를 어떻게 전개할 것인지에 대한 소매업자의 경영관리 측면에서의 해법을 제시하였다는 점이다.

• 자원환경지질
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• 제43권2호
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• pp.73-84
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• 2010

전라남도 영암군에 위치하고 있는 은적 및 상은 금은광상은 백악기의 유문암질 응회암의 열극을 충진한 맥상광체로 구성되어 있다. 은적광산은 유문암질응회암내열극을 충진한 3개조의 함 금은 열수 석영 맥이 발달하고 있다. 은적, 상은광산의 주요 광석광물로는 유비철석, 황철석, 황동석, 섬아연석, 방연석 등이 확인되었고, 일부 엘렉트럼과 자연은, 휘은석이 산출되고 있다. 광화작용과 관련된 열수변질작용은 견운모화작용이 지배적이며, 녹니석화작용 및 딕카이트화 작용이 관찰된다. 은적, 상은광산 일대의 석영맥은 brecciated, crustiform, comb, open vuggy 조직과 관련된 공생 광물군을 보여주고 있는데, 이는 두 광상의 광화작용이 전형적인 천열수 환경에서 형성되었음을 지시해 주고 있다. 또한, 상은 및 은적 광산에서 산출되는 광석시료를 대상으로 광물자원의 부존특성을 규명하고 광종에 따른 광산별 예비 재평가를 수행하기 위하여 범용자원으로서 Pb, Zn, Cu, Fe, Mo, W, Au, U와 산업원료자원으로서 In, Re, Ga, Ge, Se, Te, Y, Eu, Sm 함량을 분석했다. 예비연구결과, 철, 연, 아연, 동, 텅스텐, 우라늄을 대상으로 개발할 가치가 있는 광상은 없는 것으로 잠정적으로 사료되며, 몰리브덴과 은의 경우 정밀탐광을 통한 매장량이 확보되면 국제적 가격추이에 따라 경제적으로 개발할 가치가 있는 것으로 잠정적으로 사료된다. 맥폭을 0.25m부터 변질대를 포함한 최대 2m까지 적용하고, 금품위를 80 g/t로 적용할 경우, 상은 및 은적광산의 자원량은 6.5톤부터 65톤까지 산출될 수 있다. 그러나, 상은-은적광산의 맥 구조가 변질대와 같이 발달하고 있어 개발 가능한 변질대를 포함한 평균 품위의 산출이 되어야 하며, 변질대를 포함한 평균 품위에 따라 매장량이 달라질 수 있어 향후 많은 탐사가 수행되어야 한다.