• 해운물류연구
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• 제27권1호
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• pp.79-98
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• 2011

반잠수식(B1) 모바일 하버의 임시 저장 공간을 효율적으로 활용하기 위하여 자동 창고 시스템 개념을 모바일 하버에 활용하는 개념을 소개하고, 이 때 발생할 수 있는 문제점들을 도출 하였다. 또한, 새로운 개념인 반잠수식(B1) 모바일 하버의 운영 시에 발생할 수 있는 여러 가지 상황을 고려하여, 반잠수식(B1) 모바일 하버에 적합한 운영 시나리오를 제안하였다. 대상 항만을 선택하여 컨테이너선 별 처리 물량을 조사함으로써 운영 시나리오에 따라 컨테이너의 환적, 수입, 수출 처리 물량을 각각 18.8%, 5%, 16.5%로 예상하였다. 모바일 하버에 도입될 자동 창고의 크기를 예측하기 위하여, 반잠수식(B1) 모바일 하버와 컨테이너선 그리고 피더선을 정적인 상황으로 가정하고, 입고량과 출고량을 선형적으로 고려하여 시뮬레이션을 수행하였다. 결과적으로 반잠수식(B1) 모바일 하버의 재고 예측량은 6800 TEU로 계산되었다.

• 방사선산업학회지
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• 제17권4호
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• pp.321-326
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• 2023

Radiopharmaceuticals that need to be transported in a low-temperature state must satisfy both radiation safety and proper temperature maintenance. However, an efficient transport system considering the characteristics of radiopharmaceuticals that require low temperature maintenance has not yet existed. In order to secure a transportation system for the safe and stable transportation of the radiopharmaceutical ¹³¹I mIBG, which requires transportation in cryogenic conditions, we have developed a transportation system that can maintain cryogenic conditions below -60℃ for 6 days while stably fixing the inner container. In addition, by applying a data logger that can simultaneously measure the temperature and the dose of radiation, safety and stability in the transportation process can be secured at the same time. The cryogenic transportation system for ¹³¹I mIBG will be applied to products currently being supplied, and we expect to dramatically improve the management of cold chain radioactive material transportation.

• 한국항만학회지
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• 제2권1호
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• pp.29-73
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• 1988

Since the middle of 1950's when sea transportation service by container ship was established, containerization has been rapidly spread over the world with realization of intermodalism, and becomes an index of economy growth of a country. Our country has established Pusan Container Terminal at Pusan harbour in 1978 in step with worldwide trend of containerization, and is constructing New Container Terminal at Pusan outharbour which will be completed in 1990. This paper aims to make a quantitative analysis of the Pusan Container Terminal system through the computer simulation, especially focusing on its subsystems such as ship stevedoring system, storage system and transfer system. First, the capacity of various subsystems are evaluated and it is checked whether the current operation is being performed effectively through the computer simulation. Secondly, the suggestion is presented to improve the operation by considering the throughput that Pusan Container Terminal will have to accept until 1990, when New Container Terminal will be completed. The results are as follows ; 1) As the inefficiency is due to the imbalance between various subsystems at Pusan Container Terminal on the basis of about 1.2 million TEU of container traffic, transfer equipment level must be up to 33% for transfer crane, and free period must be reduced into 4/5 days for export/import. 2) On the basis of about 1.4 million TEU of container traffic, transfer equipment level must be up to $12\%$ for gantry crane, $11\%$ for straddle carrier and $66\%$ for transfer crane, and free period must be reduced into 3/4 days for export/import. 3) On the basis of about 1.7 million TEU of container traffic, transfer equipment level must be up to $25\%$ for gantry crane, $28\%$ for straddle carrier and $100\%$ for transfer crane, and free period must be reduced into 3/4 days for export/import. 4) On the basis of about 2 million TEU of container traffic, transfer equipment level must be up to $25\%$ for gantry crane, $30\%$ for straddle carrier and $110\%$ for transfer crane, and free period must be reduced into 2/3 days for export/import, and it is necessary to enlarge storage yard.

• Journal of Biosystems Engineering
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• 제32권6호
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• pp.422-429
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• 2007

To prevent deterioration of agricultural products during cold transportation, optimized temperature control is essential. Because the control of temperature and thermal uniformity of transported products are mainly governed by cooling air flow pattern in the transportation equipment, the accurate understanding and removal of appearance of stagnant air zone by poor ventilation is key to design of optimized cooling environment. The objectives of this study were to develop simulation model to predict the airflow and heat transfer phenomena in the cold container and to evaluate the effect of fan blowing velocity on the temperature level and uniformity of products using the CFD approach. Comparison of CFD prediction with PIV measurement showed that RSM turbulent model reveals the more reasonable results than standard $k-{\varepsilon}$ model. The increment of fan blowing velocity improved the temperature uniformity of product and reduced almost linearly the averaged temperature of product.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.263-268
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• 2011

There are many exclusive freight cars in railway freight transportation system. Gondola is one kind of freight cars. Gondolas have a role to carry bulk-type cargo such as coals and ores. A few problems are occurring due to exclusive freight cars. Operation company has redundant freight cars because exclusive freight cars can carry limited items. And purchasing cost of freight cars is higher and higher because of irregular bid. Operation efficiency of gondola is very low because return time of gondola is much longer than that of container car. In this study, we analysed the introduction effect of hopper-type container for through transit. First, we identified the characteristics of spatial distribution on freight stations. And we provided the effect of hopper-type container in terms of operation efficiency, cost reduction, new demand excavation and image enhancement of eco-friendly railroad.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.356.1-356
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• 2002

A satellite shipping container must afford the satellite a relatively benign thermal, vibration, and particle environment that is oblivious to the extreme temperatures, sand, dust, vibrations, and shock that can accompany the transportation. Korea Aerospace Research Institute has developed a new shipping container system that will be used to transport KOMPSAT-2(Korea Multi-Purpose SATellite) from Tae-jon to launch site. (omitted)

• 전기학회논문지P
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• 제57권3호
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• pp.215-224
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• 2008

In this paper, we introduced a linear motor-based transfer system with an active pid controller which can be replaced with an automated guided vehicle (AGV) for the port automation. This system, which is named LMCTS(liner motor-based container transfer system), is based on PMLSM (permanent magnetic linear synchronous motor) which basically consists of stator modules on the rail and shuttle car. Therefore more progressive and adaptive control mechanisms should be required to control a system with large variation of container weight, the difference of each characteristic of stator modules, a stator module's trouble etc. We introduced an active control mechanism with an online tuning scheme using modified evolutionary strategy. Some computer simulations are implemented to assess the robustness of the proposed system.

• 해양환경안전학회지
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• 제13권1호
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• pp.47-54
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• 2007

2001년 9월 11일 World trade center 테러이후, 미국세관 및 국경 경비대는 미국에 있는 모든 컨테이너 터미널에 inspection station을 설치하였다. 이 인스펙션은 container의 추가적인 지연을 직 간접적으로 유발하고 있다. 이에 본 연구는 이 지연을 분석하기위하여 대기이론을 이용하여 방법론적 연구를 제시하였다.

• 한국항만학회지
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• 제12권2호
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• pp.217-224
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• 1998

During the operation of crane system in container yard, the objective is to transport the load to a goal position as quick as possible without rope oscillation. The container crane is generally operated by an expert operator, but recently an automatic control system with high speed and rapid transportation is required. Therefore, we developed an optimal controller which has to control the crane system with disturbances. In this paper, we present a design of optima 2-DOF PID controller for the control of gantry crane which has to control swing motion and trolley position. We used evolution strategy(ES) to tune the parameters of 2-DOF PID controller. It was compared with general PID controller. The computer simulations show that the proposed method has better performances than the other method.

• 한국항해항만학회지
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• 제41권3호
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• pp.119-126
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• 2017

컨테이너 선박의 대형화에 따라 컨테이너터미널 내에서 동일한 시간 내에 처리해야 하는 물동량이 계속적으로 증가하고 있다. 컨테이너터미널에서는 수동처리 방식의 한계를 극복함과 동시에 지속적으로 운영측면에서 발생하는 비용을 줄이기 위하여 컨테이너터미널의 자동화 시스템을 도입하고 있다. 왜냐하면 컨테이너터미널의 게이트 반출 입 업무를 수행함에 있어 수작업 처리 시 부정확한 자료 처리로 혼란 요소가 다소 발생하고 있다. 바코드 시스템에서 스캐너에 바코드를 직접 인식시켜야하기 때문에 처리 시간소요가 다소 길고 불편함 있어 이러한 문제점을 보안하여 게이트 자동화 시스템 RFID시스템은 차량 번호를 인식하는 기술을 이용하여 반출 입 처리 소요시간 단축하여 효율적인 게이트 업무 수행을 할 수 있다. 한편, 데미지 컨테이너 체크를 수동으로 진행하는 경우 게이트 반입 할때 컨테이너의 손상여부 확인 후 수기로 게이트 작업자가 직접 문서을 작성하여 보관하기 때문에 고객이 데미지 컨테이너 증거자료를 요청할때 증거자료로 제출하기에 불충분하여 고객으로부터 크레임을 받는 경우가 발생하였다. 또한, 게이트 작업자 및 인력에 의한 컨테이너 관리의 어려움 발생하였고 게이트 주변 인력의 컨테이너 관리 안전사고에 위험이 항상 노출되어 있었다. 본 논문에서 고찰하는 게이트 데미지 컨테이너 자동화 시스템을 도입하게 되면 영상 저장 시스템에 의한 컨테이너 관리가 가능하다. 컨테이너 손상정보가 시스템에 저장되어 있기 때문에 고객이 데미지 컨테이너 자료를 요청 시 시스템에 저장 되어 있는 데미지 컨테이너 영상을 검색하여 증거자료 제출이 가능하고 고객으로부터의 크레임 대비가 가능하다. 또한, 게이트 관리 인력 업무의 통합으로 인력 감소 및 게이트 부근 안전사고 위험이 감소하였다.