• Architectural research
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• 제20권1호
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• pp.1-8
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• 2018

Gojong(高宗) had experienced extravagant change during a period of reign and he was located in the center of the change. He was the king who also experienced various changes in construction and accomplished a large number of construction activities aggressively. Gojong could acquire the information and details about anarchitecture, through the experience of a lot of large-scale construction activities in a regency period of Heungseon-Daewongun(興宣大院君). After opening of a port, as the western culture and technology was flowed in Korea, the knowledge of western architecture also was introduced. Gwanmungak(觀文閣) was constructed in Kyeongbokgung Palace under that influence in 1888, but the construction was not successfully finished. Due to the failure of Gwanmungak, Gojong no more constructed a western architecture until 1897. He was aware of the merits of western architectures while living in the western architecture during Agwanpacheon(俄館播遷). And he led a lot of constructions of the western architectures in Kyeongungung(慶運宮). It is possible to arrange in two reasons about the interest in an architecture of Gojong. Firstly, Gojong was individually interested in the architectures, and he constantly accomplished constructions of new buildings from childhood. And secondly, Gojong thought that western architecture has an advantage in the international situations. He held out the tendencies to construct the western architectures with excessive investments.

• 한국항해학회지
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• 제5권1호
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• pp.1-23
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• 1981

As far as transportation problems are concerned, the minimization of transportation cost is the most prevailing object. But in some cases, the cargo delivery time is the utter problem rather than the cost. For instance, we may imagine the case that the delivery of the construction materials is delayed behind the schedule and this makes the construction cost increased because of idle time of other materials and man power, in addition to the indemnity. Therefore the allocation of ships, in marine transportation which is now the main route of overseas trade, to the needed area on the required time is to be appropriately performed. However, there are several restrictions for cargo delivery to meet the demand, such as ship's size, number to be employed and cargo handling capacity of the ports, etc. And there are some other factors to be considered, that is, the degree of necessities of commodities, on their kinds, amount, and the time of arrival, etc. This paper deals with the problem of optimum allocation of ships emphasizing the cargo delivery time adopting Linear Programming technique with those cargo delivery restrictions and factors transformed by introducing the multi-speed conception, the conversion of multi-commodity to a single commodity, allowable delivery time, weight penalty number and nominating priority. This paper presents a case of optimum allocation of ships in the light of cargo delivery time for a construction company which has two different construction places and analyzes the result. This study will give a planner a good tool for optimum planning of maring transportation and be used for decision of schemes.

• 드라이브 ㆍ 컨트롤
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• 제15권3호
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• pp.49-56
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• 2018

Construction machinery is used to improve productivity in civil engineering work and construction work, and it is a lengthy operation, and consumes considerable fuel to cope with large loads. As a result, productivity and fuel consumption of the construction machine become the main deciding factors. In the hydraulic system of the excavator, the main control valve is the most critical position for control. The flow distribution for control performance is achieved by the metering orifice, that causes critical energy loss. To improve this, we propose a combination of a three port proportional pressure reducing valve and a poppet type flow control valve as an IMV to replace the existing spool type MCV. To validate the proposal, we analyze static characteristics by modeling mathematically, and analyze dynamic characteristics. Simulation using the AMESim software on the regeneration circuit of the boom cylinder up-down operation, verifies the energy-saving effect compared to the existing MCV when IMV is used.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2018년도 공동국제학술발표회
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• pp.167-167
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• 2018

• 전자공학회논문지A
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• 제29A권2호
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• pp.8-17
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• 1992

In this paper a push-push oscillator using DR (dielectric resonator) at K-band is designed and constructed. Two identical oscillators are arranged in a push-push configuration that has the frequency of oscillator that is twice frequency each oscillator. A dielectric resonator is placed at the input of an active two-port device(FET) yielding a stable frequency source. The oscillators realized with this technique exhibit excellent spectral purity and cancellation of fundamental frequency.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 1999년도 춘계학술발표회논문집
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• pp.93-105
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• 1999

In Vessel Traffic Service, the management information on marine traffic control is almost transported by VHF. It is so difficult to exchange a lot of the related information necessary for marine traffic control exactly and in real time. Aiming at improved visualized data transporting network, we examine the methods for transporting and displaying the data on marine traffic controls. In this paper, we design the information networks established by broadcasting method and by internet method using home page in order to manage marine traffics in Masan port.

• 한국해안해양공학회:학술대회논문집
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• 한국해안해양공학회 2003년도 한국해안해양공학발표논문집
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• pp.154-157
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• 2003

부산신항은 대규모 컨테이너 단지로서 1998년부터 공사를 시작하여 아직 공사중이며 낙동강하구에 근접해 위치하고 있다. Fig. 1은 지금 현재 상태의 해안선을 보여주고 있으며, Fig. 2는 부산 신항 완공후의 해안선을 보여주고 있다. (중략)

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2019년도 추계학술발표대회
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• pp.1116-1118
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• 2019

로봇 프로세스 자동화는 반복적이고 평범한 작업을 로봇이 하게 해 조직의 시간을 절약해 주는 기술이다. 복잡한 전산 및 수기로 작성하는 항만 관련 단순 방법적 수작업을 RPA를 활용하여 AI기반의 자동구성을 하고자 하는 프로젝트이다.

• Computers and Concrete
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• 제18권5호
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• pp.1041-1051
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• 2016

In this study, the construction of a reinforced concrete bridge pier was analyzed from durability point of view. The goal of the study is to analyze the crack iniation condition due to construction and present some recommendations for construction conditions of the reinforced concrete bridge pier. The bridge is located at the western port area of Shenzhen, where the climate is high temperature and humidity. To control the cracking of concrete, a construction simulation was carried out for a heat transfer problem as well as a thermal stress problem. A shrinkage model for heat produced due to cement hydration and a Burger constitutive model to simulate the creep effect are used. The modelling based on Femmasse(C) is verified by comparing with the testing results of a real underground abutment. For the bridge pier, the temperature and stress distribution, as well as their evolution with time are shown. To simulate the construction condition, four initial concrete temperatures ($5^{\circ}C$, $10^{\circ}C$, $15^{\circ}C$, $20^{\circ}C$) and three demoulding time tips (48h, 72h, 96h) are investigated. From the results, it is concluded that a high initial concrete temperature could result in a high extreme internal temperature, which causes the early peak temperature and the larger principle stresses. The demoulding time seems to be less important for the chosen study cases. Currently used 72 hours in the construction practice may be a reasonable choice.

• 무역학회지
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• 제48권3호
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• pp.217-242
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• 2023

본 연구는 장강 내수로 항만의 물류 수요에 영향을 미치는 요인을 분석하고, 이를 바탕으로 미래의 항만 물류 수요를 예측하는 것을 목적으로 한다. 장강 상류의 충칭항, 이빈항, 중류의 징저우항, 우후항, 하류의 난징항, 쑤저우항 등 총 6개 항만을 대상으로, 시스템 다이내믹스 기법을 활용한 물류 수요 예측을 수행하였다. 모든 항만의 물류 수요는 2026년까지 중단기 예측에서 증가세를 보였다. 충칭항의 물류 수요는 배후지 경제 규모의 영향을 주로 받았으며, 이빈항은 항만의 자동화 수준에 크게 의존하는 것으로 파악되었다. 상류 및 중류 항만의 경우, 배후지의 에너지 소비량 증가와 대기 오염 상황이 심각할수록 물류 수요가 증가하였다. 중류 항만의 물류 수요는 배후지 인프라의 영향을 주로 받았으며, 하류 항만은 도시 건설 면적의 변화에 민감하게 반응하는 것으로 나타났다. 민감도 분석 결과, 대도시에 의존하는 항만의 물류 수요는 영향 요인들의 증감폭에 대해 상대적으로 안정적이었으나, 배후지 도시 규모가 작은 항만은 영향 요인들의 변동에 민감하게 반응하는 경향을 보였다. 따라서 충칭항을 장강 상류의 핵심 항만으로 정책적 지원을 강화하고, 주변 항만들이 충칭항의 보조 역할을 수행하도록 하는 전략을 마련해야 한다. 상류 항만은 충칭항의 보조 역할을 수행하는 동시에, 중하류 항만과의 연결성을 강화하고 입항 산업의 발전을 도모하는 방안도 고려해야 할 것이다. 장강 내수로 항만의 개발 전략은 한국의 항만 및 이해관계자들에게 직항로의 개설과 교통 네트워크의 확장을 시사한다. 배후지 네트워크를 확장하고 물류허브와 연계된 효율적인 교통 체계의 구축을 제시할 수 있다. 협력을 통해 두 지역 모두에서 물류 효율성이 향상될 수 있으며, 이는 각 항만의 국제적인 위치와 경쟁력을 강화하는 데 기여할 것이다.