• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.11a
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• pp.166-169
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• 2011

항만간 허브항 경쟁이 극심해 지고 있는 오늘날, 컨테이너 선사는 M&A 및 전략적 제휴로 컨테이너터미널 운영사와의 가격 협상력의 우월적 지위를 갖게 되어 컨테이너터미널 운영사간 선사 및 화물유치를 경쟁을 더욱 부추기고 있다. 그러나 수요측면에서 컨테이너물동량 증가율 둔화로 컨테이너터미널에서 처리해야 할 물동량은 한정되어 있는 반면, 공급 측면에서 항만터미널의 지속적인 건설은 항만간 또는 터미널간 물량 유치경쟁을 과열시키고 있다. 특히 부산항은 신항 개장이후 북항과 신항간 물동량 유치경쟁으로 인하여 항만하역시장의 교란을 가져오고 있다. 본 연구에서는 부산항 컨테이너 항만하역시장의 구조적 특성분석과 설문조사 방법론을 통하여 향후 부산항 항만하역시장의 안정화 방안을 제시하고자 한다. 시장구조 분석결과 부산항은 한정된 처리물량과 신항의 개장으로 인한 공급과잉, 그리고 정부의 지역항만개발정책에 따른 컨테이너화물의 분산처리로 지속적인 부산항의 비중 감소로 선석당 처리물량이 감소하고 있다. 이에 따라 선사의 우월적 지위를 이용한 하역료 인하요구로 터미널운영사간에 서비스경쟁이 아닌 비협력적인 가격경쟁으로 재정수지가 악화되고 있고, 또한 '10년 외국적선사의 처리물량이 60%를 차지하고 있어 국부유출이 심각한 실정이다. 따라서 하역시장 안정화 방안으로 항만시설 수요 및 공급의 불균형을 조정하기 위하여 항만풀링공동기금관리를 통한 재정수지를 확보할 수 있는 항만풀링제도를 제안하며, 이 제도의 운영을 위하여 한시적으로 컨테이너터미널 운영사별 처리물량 상한제를 도입하는 것이 바람직하다고 판단된다.

• Journal of Korean Society of Archives and Records Management
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• v.12 no.3
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• pp.7-28
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• 2012

It is very important to understand changing technological environment such as information big bang, mass production of electronic records, and emergence of many storage media for the sake of promoting reliable electronic records management system. This study examined the insufficiency of current archives acts and standards, and compared to recording storage media and related technologies. Through these analyses, this paper proposes the revision of archives acts and standards such as the expansion of types of media, the elaboration of guidance for media selection. and the efficient maintenance plan for recording media.

• Journal of the Korean Data and Information Science Society
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• v.25 no.4
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• pp.799-805
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• 2014

This paper deals with a method for getting the Type III sums of squares on the basis of projections under the assumption of two-way fixed effects model. For unbalanced data in general total sum of squares is not equal to the sum of componentwise Type III sums of squares. There are some differencies between two quantities. The suggested method using projections can detect where the differences occur and how much they are different. The traditional ANOVA method could not explain clearly the differences. It also discusses how eigenvectors and eigenvalues of the projection matrices can be used to get the Type III sums of squares.

• Korean Chemical Engineering Research
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• v.52 no.2
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• pp.166-174
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• 2014

This research investigated the aging properties of the $B-KNO_3$ system as the igniter. The $B-KNO_3$ system showed the degradation in ignition properties depending on the method and period of storage. It should be found out the cause of the degradation to predict the reliability of the igniters. The changes of the properties by the degradation after aging tests were analyzed by microstructure analysis, XRD analysis and thermal analysis using DSC. It was found out that the lattice parameters of the $KNO_3$ as the oxidizer in the ignition system was changed into the JCPDS values as the aging time increased. Conclusively, the changes of the crystal structure of oxidizer affected the activation energy increasing as aging time increased.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.311-316
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• 2004

According to subcontracting company's capital circumstanre change for the worse by price regionalism and long bill supply and demand, bill principal parts settlement means were introduced. But, performance disgrace is inactive except some corporation. The purpose of this study is presenting loss and gain datum point that is standard of economical price disbursement means at construction subcontracting construction price settlement connection corporation purchaser gold Beaning means application and supply basis data. economical gains by high cash specific gravity

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.510-514
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• 2004

This research is a preliminary one to investigate transitional problems of actual-cost-date-based contract cost estimation method and suggestions for counteracting them. As parts of it, in this paper, the brief background and methods of the new method and contract costs estimated by introducing it are presented. The results of five projects' contract costs are compared to those estimated by the conventional quantity-based method. Comparison of the both is conducted in terms of total contract costs and contract costs according to type of sub-contracts. Finally, the propositional differences of the later to the former are analysed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.14 no.5
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• pp.1253-1263
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• 1994

The stability of the embankment is depended upon the location of seepage line. As the seepage flow occurs in the embankment, the slope of the embankment loses its stability. Of particular interest is the stability following a rapid change of embankment level. The variation of seepage line in the embankment model according to flow velocity was investigated. In addition to this non-steady state flow in embankment by a fluctuation of water level is discussed. The experimental model was construction with slopes of 1 : 2.5 and flow velocity is turned from 60 cm/sec~90 cm/sec. Analysis of the experimental results, the seepage line is influenced by flow velocity and coefficient of permeability.

• Composites Research
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• v.32 no.6
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• pp.349-354
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• 2019

The Aluminum conductor composite core consists of fast-curing thermosetting epoxy used as reinforcements and carbon fiber and glass fiber used as matrix. In this study, we have investigated fast curing epoxy cured products used for composite core(Aluminum Conductor Composite Core, ACCC). Tetrafunctional epoxy(PA 806) was used as a multifunctional epoxy, along with two kinds of curing agents, MNAn(5-Methyl-5-norbornene-2,3-dicarboxylic anhydride) and HHPA(Hexahydrophthalic Anhydride), to make an epoxy cured product and their properties were evaluated. Optimum conditions are confirmed by varying the content of curing accelerator in the selected epoxy and curing agent.

• Convergence Security Journal
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• v.20 no.1
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• pp.59-68
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• 2020

The purpose of this study is to consider ways to stabilize the naval unit diagnosis system that has been implemented for five years. Check the historical process and theoretical background of the naval unit diagnosis system. This is to confirm the future direction of the naval unit diagnosis system research. Therefore, the importance of this system is confirmed and the direction of development is explained through application method. In particular, the study suggested the scientific development of analytical methods, the development of analytical programs, the development of leadership diagnostic programs, the increase of personnel in the unit diagnosis team, and the acquisition of expertise and reliability. In order for the naval unit diagnosis system to develop, internal and external continuous research is required.

• Journal of the Korea Institute of Building Construction
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• v.14 no.3
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• pp.259-265
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• 2014

This study is to analyze durability of water-repellent paints mixed with water-repellents as outer surface finishing materials, and evaluate its feasibility. General functions and water-repelling effects were tested, and the feasibility was evaluated based on the test results. The experimental results of heat conduction durability, air permeability, absorption, and bond strength suggested that water-repellent paints mixed with water-repellents were suitable for finishing materials. Considering overall general durability performances, stable mixing ratios were 2, 5, and 8%.