• 한국정보과학회논문지:소프트웨어및응용
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• 제37권3호
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• pp.194-204
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• 2010

실세계의 공간이나 이에 대응되는 가상세계의 공간은 공간의 일부인 지역(region)들과 그것들을 차지하고 있는 물리적 객체(physical object)들로 구성되어 있다. 이러한 공간 구성요소들간의 공간관계의 표현의 실제와의 부합성과 다양성은 이러한 공간에서 활동하는 에이전트의 공간관계 추론이나 이벤트(event)의 전개의 사설성과 정교함의 바탕이 된다. GIS나 AI 분야에서 연구되고 있는 기존의 공간관계 모델들은 객체의 규모에 따라 이원화된 영역에 적절한 모델들이거나 제한된 위상관계만 표현할 수 있기 때문에 다양한 지역과 객체를 가진 일반적 공간의 통합적 표현에는 부적합하다. 본 연구에서 개발될 공간표현 모델은, 첫째 대규모 공간과 소규모 공간 관계에 통합적으로 적용가능한 계층구조를 바탕으로 구성한다. 둘째, 소규모 객체들간에도 disjoint나 touch와 같이 제한된 위상 공간관계(topological relations)만이 아닌 접촉관계와 구성요소객체들의 조합을 바탕으로 하여 충분히 다양한 공간관계를 표현할 수 있도록 세분화한다. 셋째, solid object에 대비되는 container성질을 추가하고 중력 방향을 고려하여 공간관계를 추가로 다양화한다. 본 연구의 결과인 중력의 영향을 고려한 통합적 공간관계 모델은 컴퓨터상에서 실세계와 유사한 복잡한 가상공간을 공간적 사건들과 연관지어 정밀하게 시뮬레이션할 수 있게 하고 가상공간에서 에이전트들이 행동을 할 때 공간적 측면의 상황판단을 할 수 있도록 가상공간에 대한 에이전트들의 공간적 지식을 표현하는 수단을 제공한다.

• 한국정보시스템학회:학술대회논문집
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• 한국정보시스템학회 2004년도 춘계학술대회
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• pp.122-137
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• 2004

Automation of a container terminal is a world-wide tendency nowadays. The interest of ACT (Automated Container Terminal) is increasing more and more because of necessity of container terminal with higher competitive power and ultramodern equipment to down the cost and up the efficiency. ECT (Europe Combined Terminals) and CTA (Container Terminal Altenwerder) have studied a detailed technique for the operation of ACT. In Korea, many projects related to the development of ACT are working at present. However, indiscreet introduction of ACT may cause tremendous loss. Thus it is much important thing that we search relevant automation level or type for an environment In this study, we propose the necessary strategy in developing ACT through analyzing the present condition, automated equipments and property of operation at advanced An. If the strategy is applied in development of domestic ACT, we'll be able to build ACT with higher competitive power.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(II)
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• pp.92-97
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• 2003

Roadbed failure due to the rainfall may bring out social and economic demage such as the loss of life and property, the consumption of time and cost for recovery, and the delay of logistics in railway. In this study, the method using Geotextile Container was applied to rehabilitation of the railway roadbed which was failed by rainfall. The real scale tests with the simulated train loading were performed in order to evaluate the dynamic performance at the railway roadbed using Geotextile Container. The results of these tests were compared with unreinforced and reinforced cases with Geotextile Container, respectively. The data gathered by various measurement devices from these real scale tests would be useful to evaluate and understand the roadbed with Geotextile Container. Furthermore, the results of this study would be useful to ensure the workability and to save much time for restoration and to be widely applied to practical use.

• Journal of Ship and Ocean Technology
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• 제7권3호
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• pp.56-65
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• 2003

The hull monitoring systems of container ships with four long-base gages give enough information for identifying the hull girder loads such as bending and torsional moments. But such a load-identification for container ships has not been known. In this paper, a load-identification method is suggested in terms of a linear matrix equation that the measured strain vector equals to the multiplication of the transformation matrix and the desired strain component vector. The equation is proved to be mathematically complete by the property of positive-definite determinant of the transformation matrix. The method is applied to a hull stress monitoring system for 8100TED container ship during sea trial, and the estimated external loads illustrate reasonable results in comparison with the pre-estimated results. This moment decomposition concept has also been tested in real operation conditions. The typical phenomena over the Suez Canal illustrated very suitable results comparing with the physical understandings. Henceforth, one can effectively use the proposed concept to monitor the hull girder loads such as bending and torsional moments.

• 펄프종이기술
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• 제31권4호
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• pp.69-75
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• 1999

This study was performed to investigated the application of mixed resins for corrugated container board. The corrugated container board yields a sandwich structure in which a linerboard material is glued to a corrugated medium . Now, manufacturing corrugated container boards don't provide sufficient strength, and result in box failure during shipping . Therefore improvement of box strength is necessary . In this study, we intend to improve box strength by improving corrugated medium strength with mixed resins and to find the optimum treatment condition of this resins. First, we tried to mixed resins as Starch+CMC, Starch_Irea, CMC+Urea, Second, investigated to applicability of this resins for corrugated medium , and the third, measured tensile index, burst index, and edgewise compression index on liner, medium paper, and single faced corrugated container board. In this test results, we obtained that the improvement ratios of tensile index in liner and medium paper were approximately 80-185%, 60-118% , respectively. The respecting improvement ratios of edgewise compression index of single faced corrugated container board was approximately 91-124%, relatively. In addition, we concluded that optimum condition in mixing ratio was 1 :3 with CMC + Urea and the ap[plication amounts was 9% on materials. Fro manufacture of corrugated container board, optimum condition in mixing ratio was 1 : 3 with 5% CMC +Urea , because of considering to improvement of strength on cost.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 춘계학술대회 및 창립 30주년 심포지엄(논문집)
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• pp.381-387
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• 2006

본 연구에서는 컨테이너항만의 경쟁력 확보를 위한 핵심전략인 서비스의 중요성을 제시하고 컨테이너터미널의 서비스품질을 측정하기 위한 도구를 개발하고자 하였다. 이를 위하여 본 연구에서는 첫째, 기존연구 고찰과 실증연구를 통하여 컨테이너터미널이 제공하고 있는 서비스항목들을 추출하였다. 둘째, 추출된 서비스항목들에 대한 전문가집단의 검증과정을 통하여 서비스항목을 정제하였다. 셋째, 최종적인 서비스항목들에 대하여 선사 설문조사를 통한 컨테이너터미널 서비스품질 척도를 개발하였다. 넷째, 고객(선사)들의 만족도와 서비스차원과의 관계를 알아봄으로써, 규명된 서비스품질이 고객만족과 어떠한 관계가 있는지 살펴보았다. 마지막으로, 실증분석을 통해 얻은 결과를 바탕으로 시사점을 제시하였다.

• 융합보안논문지
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• 제23권4호
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• pp.23-32
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• 2023

클라우드 컴퓨팅 환경에서 컨테이너 기반 가상화는 게스트 운영체제 대신에 호스트 운영체제를 공유함으로써 가벼운 사용감으로 가상머신 기반 가상화 기술의 대안으로 많은 관심을 받고 있다. 그러나 호스트 운영체제를 공유함으로써 발생하는 문제점이 컨테이너 기반 가상화의 취약성을 높일 수 있다. 특히 컨테이너들이 자원들을 과도하게 사용함으로 인해 컨테이너들의 격리성을 침해할 수 있는 noisy neighbor problem은 사용자들의 가용성을 위협하게 되므로 보안 문제로 인식할 필요가 있다. 본 논문에서는 컨테이너 기반 가상화 환경에서 noisy neighbor problem이 격리성 보장을 위협할 수 있는 취약성을 고찰한다. 이를 위해 컨테이너 기반의 가상화 구조를 분석하여 기능별 계층에 대한 격리성 보장에 위협이 될 수 있는 취약점을 도출하고 해결 방향과 한계점을 제시한다.

• 한국해양공학회지
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• 제37권4호
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• pp.158-163
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• 2023

Objects adrift can cause considerable damage to coastal infrastructure and property during tsunami and storm surge events. Despite the potential for harm, the drifting behavior of these objects remains poorly understood, thereby hindering effective prediction and mitigation of collision damage. To address this gap, this study employed a motion analysis program to track a drifting container's location using images from an existing laboratory experiment. The container's trajectory and velocity were calculated based on the positions of five markers strategically placed at its four corners and center. Our findings indicate that the container's maximum drift velocity and distance are directly influenced by the scale of the solitary wave and inversely related to the container's weight. Specifically, heavier containers are less likely to be displaced by solitary waves, while larger waves can damage coastal structures more. This study offers new insights into container drift behavior induced by solitary waves, with implications for enhancing coastal infrastructure design and devising mitigation strategies to minimize the risk of collision damage.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2004년도 추계학술발표대회 개요집
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• pp.183-184
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• 2004

High capacity container carrier has been considered for many decades to transport the more containers at the same time. Therefore, it is required for high capacity container ship to be applied thicker plate to accomodate a number of containers compared to that of general container ship. To maintain the same productivity of this thicker plate, new welding process should be considered. One of the process for vertical-up position is 2 electrodes EGW(Electro Gas Welding). 2 ectrodes EGW was applied and evaluated whether it can be applicable or not. The heat input used for 72mm thick plate was 520k11cm. from the mechanical test, it is considered that this process can be applicable, showing satisfaction of mechanical properties such as tensile strength, elongation and impact property.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2005년도 추계학술발표대회 개요집
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• pp.150-151
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• 2005

High capacity container carrier has been considered for many decades to transport the more containers at the same time. Therefore, it is required for high capacity container ship to be applied thicker plate to accomodate a mumber of containers compared to that of general container ship. To increase productivity of welding, new welding process should be considered. A representive process for increase of weld productivity is EGW(Electrode Gas Welding) process. Both sides EGW process was evaluated for thicker-plate TMCP Steel. From the test result, it is considered that this process can be applied, showing satisfaction of mechanical properties such as tensile strength and impact property.