• 한국실내디자인학회논문집
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• 제19권3호
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• pp.172-179
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• 2010

The Sydney Opera House is built on a peninsula of rock that juts out into Sydney Harbor. The site was once a landing place for ships. Utzon, Architect, designed the theatres for the Opera House to fit the shape. The two theatres were placed side by side so that they both had extensive harbor views. The Sydney Opera House is designed the foyers to take full advantage of these sights. Because the building would be seen from all sides, even from above, it was to be a piece of sculpture. The outside was as important as the inside. The audience enters from behind the stage and walks around to the foyers overlooking the harbour. The wing and backstage areas are small because of the way the foyers wrap around the theatre. The stage is made up of large platform lifts which provide the vertical movement for changing scenery. The sets come up from the workshops below stage. The flytower fits under the largest roof shell and doesn't break the skyline. The important elements are the podium, the shells and the reminders. The podium, the huge monolithic concrete structure, contains hundreds of rooms and nearly all the technical equipment. The podium is clad with pink granite slabs and seen from the water. This design eliminated a maze of fire escape stairs and, at the same time, gave people a wonderful view of the harbour. The egg shell is remarkably strong and express the form as the symbol of the site.

• 한국구조물진단유지관리공학회 논문집
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• 제22권3호
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• pp.38-45
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• 2018

건설해체공사와 유사한 특성을 갖는 원전 제염해체공사에서 구조적 리스크 관리는 매우 중요하다(DOE). 하지만 제염해체작업 중 발생할 수 있는 구조적 재난재해 및 위험요소는 크게 고려하지 않고 있다. 이로 인해, 구조적 재난 및 재해에 의해 발생할 수 있는 작업자 리스크 역시 체계적으로 정립되어 있지 않다. 또한, 재난 및 재해 그리고 리스크 분류체계는 작업의 특성(작업프로세스, 활용장비, 작업 위치 등)별로 분류되어 있지 않아 실제 해체공사를 위한 매뉴얼로 활용하기에 무리가 있다. 따라서 차폐 콘크리트 구조물 제염해체공사의 건설해체공사와의 유사성을 기반으로 작업의 특성별로 분류한 리스크를 도출하는 것은 원자력 발전소 해체공사 리스크 관리에 필수적으로 판단한다.

• 한국지반신소재학회논문집
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• 제15권4호
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• pp.105-115
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• 2016

본 연구에서는 강우에 의해 붕괴가 발생한 식생옹벽의 현장사례를 바탕으로 붕괴원인을 분석하였으며, 분석결과를 이용하여 복구방안을 제시하였다. 또한 복구방안으로 제시된 대책공법에 대한 안정성을 평가함으로써, 그 타당성을 검증하였다. 사례현장의 붕괴원인 분석결과, 지반조사 및 옹벽구조물에 대한 안정성 검토를 수행하지 않은 채 구조물 계획을 수립하였고, 배수계획 누락과 재료 및 다짐관리 기준이 현행 국가기준에서 요구하는 수준을 만족하지 못하는 등 현장조건에 부합하는 설계가 이루어지지 않았다. 또한, 가시설 공법 검토 및 시공관리의 미흡 등도 붕괴의 주요 원인으로 판단하였다. 이를 바탕으로 흙막이 구조물, 지반보강 및 블록식 보강토옹벽을 이용하여 현장조건이 고려된 복구 대책공법을 제시하였다. 그리고 각 공법의 안정성을 평가한 결과, 소요안전율을 확보함으로써 제시된 대책공법으로써의 타당성을 검증하였다. 따라서 옹벽구조물의 시공 시에는 적합한 설계법의 적용과 함께 시공관리를 통하여 구조물의 안정성을 확보할 필요가 있음을 확인하였다.

• 의료법학
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• 제15권1호
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• pp.239-262
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• 2014

The conventional medical appraisal which was done in the process of medical lawsuit was requested from the court to the designated hospital and was delivered as a pattern of one question and one answer in each. However, the comprehensiveness of medical appraisal which was pursued, for example, in Korea Medical Dispute Mediation and Arbitration Agency, could be guaranteed in terms of in-depth medical analysis as well as the broader capacity of the causality estimation besides. The comprehensiveness of appraisal would also include how well organized hospital system of medical care is and how well correlated job system among medical staffs, when medical dispute was happened at the hospital. This comprehensiveness will exert a big contribution on making a demonstrative medical care to prevent from the medical dispute and it could achieve the national plan of building the patient safety net which is effective in restoring the worsened quality of contemporary medical service. Therefore, the comprehensiveness of medical appraisal has to be designed to go forward interdisciplinary fused speciality rather than one division of medicine, which is also aiming at the reliable and consistent appraisal with the supreme dignity from one window. In addition to that, the objective and concrete frame of comprehensive appraisal under the computed connection has to be deliberated to make itself possible in collaboration with positive participation of medical community. The comprehensiveness of medical appraisal would serve to expand not only the capacity of speciality but also the ability of influence on a restorative justice, so that it give effect to an increased number of mediation and arbitration rather than medical lawsuit as well as a decreased number of the social cost and social conflict.

• 한국강구조학회 논문집
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• 제14권4호
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• pp.549-556
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• 2002

바닥구조의 진동을 평가하는데 있어 기존의 고유진동수 예측식에 의한 방법이 사용되어지고 있다. 그러나, 이러한 예측식들은 재료에 따른 구분이 없기 때문에 실제와느나 다른 결과를 보이게 된다. 또한, 합성데크 플레이트 슬래브의 경우, 고유진동수를 예측하기 위해 슬래브의 단면을 환산해야 하는데, 각 데크 플레이트의 특성상 그 형태가 상이함으로 인하여 많은 어려움을 느끼게 된다. 따라서, 본 논문에서는 슬래브의 단면을 환산하기 위한 새로운 단순화된 방법을 제시하였다. 그리고, 실제 측정값과 가장 오차율이 적은 "LRFD"에 제안된 고유진동수 산출식을 보정하여 기존 예측시에 비해 약 14.3%의 오차율을 개선하는 새로운 예측보정식을 제안하고, 이에 대한 일반적인 적용가능성을 검증하였다.

• Journal of the Korean Wood Science and Technology
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• 제19권4호
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• pp.34-42
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• 1991

Protection of tropical forest affects on significant reduce of tropical hardwood supply, and softwood resources will be increasingly important for the timber security in Korea. U.S. softwood log was most favorite species for Korean softwood log importers in overall import conditions except price stablization and consistency of export policy. Reduced export volume from Pacific Northwest to Korean market has been immediately replenished by rediata pine from New Zealand and Chilean plantation. Siberian timber will hardly play major roles in Korean timber market unless budding structure. softwood plywood and softwood furniture uses are enhanced. Recent rapid rise of labor cost and reducing tariff rrate in Korea provided better opportunities for import lumber in building materials market. Dry dimension lumber was relatively profitable when processed from import U.S. soft-wood log while green lumber was favorable products processed from radiata pine log in Korean lumber market. This means U.S. softwood lumber would have better opportunity to market for '2${\times}$'4 studs when wood frame housing is introduced. On the other hand while radiata pine is competitive on temporary construction lumber such as supporter and concrete forming frame in Korea. Shortage of raw material for the new capacity of board plants in Korea will be it bottle neck. Major log export countries to Korea as U.S. New Zealand and Chile showed high trade intensity indices of composite hoard produces for Korean market. As Korea efforts to diversify import sources, and tariffs are reduced to 8% as scheduled by 1994. countries of scoring higher comparative advantages as Portugal. Brazil, Austria as well as New Zealand will have better opportunity to penetrate into promised Korean composites hoard market.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2018년도 춘계학술대회 논문집
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• pp.101-101
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• 2018

Quantitative measurement of chloride ion concentration has an important role in various fields of electrochemistry, medical science, biology, metallurgy, architecture, etc. Among them, its importance of architecture is ever-growing due to unexpected degradations of building structure. These situations are caused by corrosion of reinforced concrete (RC) structure of buildings. And chloride ions are the most powerful factors of RC structure corrosion. Therefore, precise inspection of chloride ion concentration must be required to increase the accuracy of durability monitoring. Multi-walled Carbon nanotubes (MWCNTs) have high chemical resistivity, large surface area and superior electrical property. Thus, it is suitable for the channels of electrical signals made by the sensor. Silver nanoparticles were added to giving the sensing property. CuBTC, one of the metal organic frameworks (MOFs), was employed as a material to improve the sensing property because of its hydrophilicity and high surface area to volume ratio. In this study, sensing element was synthesized by various chemical reaction procedures. At first, MWCNTs were functionalized with a mixture of sulfuric acid and nitric acid because of enhancement of solubility in solution and surface activation. And functionalized MWCNTs, silver nanoparticles, and CuBTC were synthesized on PTFE membrane, one by one. Electroless deposition process was performed to deposit the silver nanoparticles. CuBTC was produced by room temperature synthesis. Surface morphology and composition analysis were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), respectively. X-ray photoelectron spectroscopy (XPS) was also performed to confirm the existence of sensing materials. The electrical properties of sensor were measured by semiconductor analyzer. The chloride ion sensing characteristics were confirmed with the variation of the resistance at 1 V.

• 한국구조물진단유지관리공학회 논문집
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• 제22권5호
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• pp.101-109
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• 2018

모듈형 구조시스템은 학교 및 아파트 건물과 같은 저층 및 중층 구조물에 점점 더 많이 사용되고 있다. 최근에는 고층 건물에 모듈러 구조시스템을 적용하는 방법에 대한 연구가 수행되고 있다. 고층 모듈러 구조시스템에 대해 충분한 저항력과 경제적인 구조를 제공하기 위해 복합모듈 구조시스템이 제안되었다. 본 연구에서는 일련의 실험을 통해 단위 복합모듈 구조에 적용하기 위한 목적으로 비대칭 복합 기둥의 강도를 평가하고자 하였다. 실험적 연구는 기둥의 세장비, 편심율 및 관통바 유무에 따라 기둥의 강도에 미치는 영향에 중점을 두었다. 단위 모듈구조에 대한 비대칭 기둥단면의 설계식을 제안하였다. 결과로부터, 설계식은 단위 복합모듈 구조에서 비대칭 기둥단면의 적절한 강도 예측을 제공한다는 것을 알 수 있다.

• 한국시스템다이내믹스연구
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• 제14권3호
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• pp.25-49
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• 2013

As global competition for green car, that is environmentally friendly car, is getting tougher, the governments and the related industries are putting their core efforts in its diffusion. However, the green car sales are disappointing so far. To overcome the gridlock, it is necessary to develop concrete analytical framework to understand the diffusion process. Based on causal loop analysis from the previous work, we have identified main variables and relationships of them in the diffusion process and developed a stock-flow diagram and mathematical formula for the main components. The model would be applied for further quantitative simulation on the diffusion process of green car and other innovative goods as well. Also, we have suggested constructive insights for the policy makers and for the related industries. First, it is important to increase consumers' willingness to consider through marketing and word of mouth to accelerate the diffusion process. Second, in the perspective of the industry, the market share of green car should be increased at the earliest possible stage and this could be done by enhancing each components of green car attractiveness(e.g. price, driving range, social infra). Third, companies should develop a balanced investment between consumer and technology sector through a flexible financial policy. Fourth, the government continuously has the role of investing in the related R&D and social infra building. We expect the green car diffusion model and related formula from the research can provide meaningful tools to analyze the diffusion process of other new and innovative goods based on its deep researched literature review.

• 한국구조물진단유지관리공학회 논문집
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• 제22권4호
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• pp.121-125
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• 2018

본 연구에서는 음향 방출 기법을 사용하여 강연선(7-wire strand)의 손상을 감지하기 위한 기초 실험을 수행하였다. 강연선은 주로 교량에 추가적인 인장력을 제공하기 위해 널리 사용되는 건설 자재이다. 프리스트레스 교량 또는 사장교가 대표적인 경우이다. 그러나 교량 노화가 급격히 진행되면서 강연선 부식 문제가 대두되고 있다. 이러한 이유로 케이블 점검을 위한 다양한 비파괴 방법이 연구되고 있고 현장 적용이 시도되고 있다. 비파괴 방법 ??중 하나인 음향 방출 기법은 케이블 손상 및 파단을 감지하는 효과적인 기술로 알려져 있다. 본 연구에서는 음향 방출 기법의 교량에 대한 적용 가능성을 평가하기 위해 강연선의 손상에 따른 음향 방출 신호 특성을 인장 실험을 분석 하고, 현장 적용을 위한 최적 센서 주파수 타입을 선정하였다. 결과적으로, 음향 방출 기법을 활용하여 향후 교량 케이블의 부식 파단 및 파단 징후를 감지 할 수 있다고 여겨진다.