• LP가스
• /
• s.102
• /
• pp.63-67
• /
• 2006

최근 벌크공급 확대를 위해 LPG업계가 노력하는 가운데 우리보다 먼저 벌크공급방식을 정착시킨 일본에서는 벌크설치 대수 증가 뿐 아니라 경영효율화를 추구하는 방향으로 경영전략이 선회하고 있다. 관련내용을 게재한다.

• LP가스
• /
• s.97
• /
• pp.33-41
• /
• 2005

최근 LPG의 유통비용을 감소시켜 가격경쟁력을 제고하기 위한 움직임이 나타나고 있다. 도시외곽지역이나 특정사용시설을 중심으로 설치되는 LPG소형저장탱크의 보급을 통한 벌크공급시스템이 바로 그것이다. 따라서, 본고에서는 LPG벌크공급시스템에 대해 살펴보고자 한다.

• Journal of KIISE:Computing Practices and Letters
• /
• v.16 no.6
• /
• pp.707-711
• /
• 2010

Most relational database systems provide $B^+$-trees as their main index structures, and use bulk-loading techniques for creating new $B^+$-trees on existing data from scratch. Although bulk loadings are more effective than inserting keys one by one, they are still time-consuming because they have to sort all the keys from large data. To improve the performance of bulk loadings, this paper proposes an efficient parallel bulk loading method for $B^+$-trees based on CUDA, which is a parallel computing architecture developed by NVIDIA to utilize computing powers of graphic processor units for general purpose computing. Experimental results show that the proposed method enhance the performance more than 70 percents compared to existing bulk loading methods.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2001.04a
• /
• pp.65-68
• /
• 2001

이 논문에서는 고차원 색인 구조인 CIR-트리를 위한 효율적인 벌크로딩 알고리즘을 설계하고 구현한다. 벌크로딩 기법은 대량의 고차원 데이터가 색인 구성 시 함께 주어진는 경우 색인의 구성을 빠르게 하고 구축한 색인의 검색 성능을 향상시킨다. CIR-트리는 변별력 있는 일부 차원만 이용해서 비 단말노드의 엔트리를 구성하기 때문에 엔트리 크기가 일정하지 않다는 특징이 있으며 이는 비단말 노드의 팬아웃을 높이고 탐색 성능을 향상시키는 효과가 있다. 기존에 다차원 및 고차원 색인구조를 위한 벌크로딩 기법이 제안되었지만 이러한 CIR-트리의 특징을 제대로 살릴 수 있는 방법은 없다. 따라서 이 논문에서는 기존의 벌크로딩 알고리즘을 개선하면서 CIR-트리의 특징을 효과적으로 색인 구성에 반영할 수 있는 알고리즘을 제안한다. 또한 이를 BADA-III의 하부 저장 시스템인 MiDAS-III에서 구현하고 다양한 실험을 통해 그 성능을 입증한다.

• LP가스
• /
• s.106
• /
• pp.20-23
• /
• 2006

벌크로리에 의한 LPG공급 가능한 사업자에 대해 알아보자

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.15 no.6
• /
• pp.47-61
• /
• 2016

The present study analyzed the railway transport characteristics of bulk cargo flowing in and out of trade ports in South Korea. Bulk cargo transport in freight stations located behind trade ports was examined using actual flow data, and new implications were drawn accordingly. The results showed that bulk cargo volume in freight stations located behind trade ports is gradually decreasing, and it is also failing to secure a competitive edge against road transport. This downfall can be mainly attributed to the decrease in competitiveness of railway transport as well as the emergence of new trade ports that do not have lead-in track for port. Therefore, greater effort is required to strengthen the connection between new trade ports and railway freight stations.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2016.05a
• /
• pp.151-152
• /
• 2016

Various studies on Port and Terminal have been conducted to gain the competitive advantage, but they are limited to the bulk terminal than container terminal. Therefore, the study is to analyze the service quality of bulk terminal. The study first finds attributes of bulk terminals through professional groups and brainstorm. This study analyzes the difference between the perception of the actors such as carriers, forwarders and shippers, using a bulk terminal. The result shows that all service quality factors have a significant effect on the satisfaction.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.36 no.8
• /
• pp.945-951
• /
• 2012

In this study, we analyze the static and dynamic characteristics of a bulk-cement trailer with a simpler structure that carries powders. The commercial software ANSYS is used to prepare a detailed three-dimensional model of the chassis frame and tank body that bear most of the load of a bulk-cement trailer for the finite element analysis. Modal analysis is conducted to examine the dynamic characteristics of the trailer body, and static analysis shows weak links in the structure. Finally, we propose a method to increase the strength of vulnerable areas and to reduce the weight of the trailer by applying the Taguchi method.

• Journal of Korea Society of Industrial Information Systems
• /
• v.27 no.6
• /
• pp.105-114
• /
• 2022

We examine berth allocation problems in tidal bulk ports with an objective of minimizing the demurrage and dispatch associated berthing cost. In the proposed optimization model inventory (or stock) level constraints are considered so as to satisfy the service level requirements in bulk terminals. It is shown that the mathematical programming formulation of this research provides improved schedule resolution and solution accuracy. We also show that the conventional big-M method of standard resource allocation models can be exempted in tidal bulk ports, and thus the computational efficiency can be significantly improved.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2023.11a
• /
• pp.119-119
• /
• 2023

국가 간의 거래가 꾸준하게 증가함에 따라 수출입 활동도 지속적으로 증가하고 있다. 수출입 활동을 위해서는 포워더의 활동이 필수적이다. 따라서 본 연구에서는 포워더의 서비스를 이용하는 화주의 만족도를 살펴보기 위해 분석을 실시하였다. 컨테이너화물의 화주와 벌크화물의 화주로 구분하여 ‥‥(중략)‥‥.