• 한국분말재료학회지
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• 제13권1호
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• pp.52-56
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• 2006

The aim of this work was to establish an optimal condition for determination of apparent density and flow rate for warm compacting powder. For this purpose it was evaluated uncertainty on them according to ISO Guide to the Expression of Uncertainty in Measurement. This evaluation example would be useful even in powder fluidity measurement at room temperature.

• 한국분말재료학회지
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• 제13권1호
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• pp.57-61
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• 2006

The present work illustrates the use of water-soluble cupric salts as ingredients of binder for injection molding of $W-10 wt\%$ Cu. Parts produced are dense, homogeneous and have good surface finish, compared to those produced using conventional binder system. This new binder system provides also process-simplification benefit. $CuCl_2\;and\;Cu(NO_3)_2$ with the purity of $98\%$ was selected for this study. Rapid sintering process involving thermal decomposing was successful in densification for 1h. Final density that is about $93\%$ of theoretical value could be obtained, and are distinguishable from conventionally processed W-Cu composites.

• 한국농공학회논문집
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• 제47권1호
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• pp.13-22
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• 2005

Despite the variety in sizes and shapes of agricultural products, the unified standardization of packing has been a long time necessity. In this study the stacking efficiency of packing standards for each box using packing Monte Carlo simulation based on the standard pallet is evaluated. As a result of simulation the unified packing standard for agricultural products is suggested by 550$\times$366 mm. With this study it is expected that the unification of the standards can help to increase the utilization of reusable packages and to improve efficiency of agricultural logistics.

• 경영과학
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• 제34권2호
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• pp.115-123
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• 2017

IS audit has been regarded as contributing to the improvement of the quality of information Systems, recently, it has been argued that it is not possible to expect a effectiveness, because it can offset the schedule burden due to the preparation of additional documents for Audit and it affect to the project schedule. The effectiveness and quality criteria of IS audit are different between groups, because IS audit is responsible for checking the results and process of the developer company. In this study, we modeled between IS effectiveness and auditor competence, audit firm competence, IS audit standards. As a result, it was concluded that auditor competence, audit firm competence, IS audit standards have a positive effect on IS audit effectiveness. However, according to the result of comparing between interest groups, audit firm competence and audit standards were significant in auditor group, but audit standard was significant in requesting organization and developing company thought that auditor was a important factor to audit effectiveness.

• 대한산업공학회지
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• 제39권4호
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• pp.298-312
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• 2013

This paper compares efficiency results and performance targets for academic departments in a local private college using DEA (Data Envelopment Analysis). Because of an aging society, a smaller school-age population entering colleges, and enhanced accreditation standards by the government, colleges and universities are not recruiting and retaining sufficient students and therefore are struggling for survival. In contrast to popular four-year undergraduate universities concentrated in Seoul and its satellite cities, retaining students is critical for the survival of local private colleges in poor or remote regions. Therefore, it is very important to identify the factors involved in the retention of students in the various departments of a college. However, given the different characteristics of the departments, it is difficult to identify one unique or robust set of standards to evaluate their performance. The purpose of this paper is to maximize student retention capabilities by ensuring that additional resources are assigned to efficient DMUs, while, inefficient DMUs are given benchmarked targets. Based on previous studies and college accreditation standards, this paper presents indices to be used in evaluating the efficiency of academic departments in a college. In evaluating relative efficiency, this paper uses the output-oriented BCC model. To define target levels to be achieved for efficient DMU, a multi-stage DEA procedure is used.

• 한국환경생태학회지
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• 제23권4호
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• pp.309-316
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• 2009

휴양지역의 평가기준 설정을 위한 다양한 시각매체의 활용가능성에 대한 관심이 높다. 그러나 기준평가를 위한 시각 매체의 유용성은 시각매체가 얼마나 정확하게 현장 상태를 반영하는가에 달려있다. 본 연구는 정적 이미지와 동적 이미지를 이용하여 산정된 조우기준을 비교함으로써 움직임의 효과를 평가하였다. 연구대상지는 무등산도립공원 내 중머리 지역이었다. 총 50명의 대학생이 실험실 조사에 참여하였으며 Photoshop과 Flash 컴퓨터 프로그램을 이용하여 제작된 정적이미지와 동적 이미지의 허용도를 평가하였다. 조사결과, 정적 이미지와 동적 이미지 간에 최대허용수에 차이가 없는 것으로 분석되었으며 전반적 조우규범측정곡선도 거의 동일한 것으로 나타났다. 이미지 노출 순서와 움직이는 사람의 비율에 따른 조우기준도 조사되었다. 그러나 본 지역과 같은 특정 상황에서 조우기준을 개발하기 위하여 정적 이미지 대신 보다 복잡한 방법을 요구하는 동적 이미지를 이용함으로써 얻는 이점은 없다고 판단된다. 보다 정교한 매체이용에 따른 장단점에 대하여 토의하였으며 다른 자원환경 평가에 움직임 또는 소리와 같은 요소들이 조우규범에 미치는 영향에 대한 보다 많은 연구가 요구된다.

• 한국항해항만학회지
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• 제45권2호
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• pp.61-68
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• 2021

Logistics movement using ships has been used for many centuries, but maritime accidents are still difficult to predict and they occur on a large scale. The International Maritime Organization (IMO) made it mandatory to install Electronic Chart Display and Information System (ECDIS) for safe seas, but S-57 standards applied to equipment were not updated over 30 years. In addition, it is difficult to keep the equipment up-to-date and revise standards as ships move around the world. In consideration of the limitations of S-57, the IHO developed the new standard as S-100 rather than an update of the S-57. In this study, the previously developed S-100 tool and S/W were configured as one platform and applied to the S-100 ECDIS. The platform conducts as the S-100 cycle and ecosystem from the creation of standards to release and practical use in ships. The hydrographic information standard is machine-readable as defined in S-100, and it has been validated that the latest standard can be applied using the Plug and Play (PnP) function without software system updates. It is expected that international organization such as the International Hydrographic Office (IHO) and the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) shall develop and release standards and mariners can easily apply the latest standards to equipment through the machine-readable platform.

• 한국철도학회논문집
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• 제11권3호
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• pp.286-293
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• 2008

본 연구에서는 국내 실정에 적합한 표준 기반의 코드체계를 구현하기 위하여 u-FOS 시스템을 적용하고 물류정보를 인식하기 위하여 900MHz 대역의 수동형과 2.45GHz 대역의 능동형 RFID 시스템을 이용하였다. RFID 정보를 획득하기 위하여 철도차량과 화물차량의 이동속도 및 최적으로 인식이 가능한 부착위치를 현장 테스트를 통해 확보하였다. 인식된 RFID 정보는 u-FOS 시스템으로 전달할 수 있도록 하고, RFID ODS 네트워크 상에서 육송 물류 관리를 하기 위하여 표준코드체계를 KKR코드체계로 제시함으로써 연관기관 및 기업이 쉽고 빠르게 도입한 수 있도록 가이드라인을 제시하였다.

• 한국산업융합학회 논문집
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• 제26권5호
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• pp.855-866
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• 2023

With the rapid advancement and sophistication of defense weapon systems, the government, military, and the defense industry have conducted various innovative attempts to improve the efficiency of post-logistics support(PLS). The Ministry of Defense has mandated RAM-C(Reliability, Availability, and Maintainability-Cost) analysis as a requirement according to revised Total Life Cycle System Management Code of Practice in May 2022. Especially, for the project budget forecast of new PBL(Performance Based Logistics) business contacts, RAM-C is recognized as an obligatory factor. However, relevant entities have not officially provided guidelines or manuals for RAM-C analysis, and each defense contractor conducts RAM-C analysis with different standards and methods to win PBL-related business contract. Hence, this study aims to contribute to the generalization of the analysis procedure by presenting a cost analysis case based on RAM-C for the supply of military depot maintenance PBL project. This study presents formulas and procedures to determine requirements of military depot maintenance PBL project for repair parts supply. Moreover, a sensitivity analysis was conducted to find the optimal cost/utilization ratio. During the process, a correlation was found between supply delay and total cost of ownership as well as between cost variability and utilization rate. The analysis results are expected to provide an important basis for the conceptualization of the cost analysis for the supply of military depot maintenance PBL project and are capable of proposing the optimal utilization rate in relation to cost.

• 한국항만경제학회지
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• 제28권1호
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• pp.143-157
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• 2012

물류기업은 가장 저렴한 원가구조를 갖는 지역에 생산, 물류거점 기지를 운영하며 세계시장을 대상으로 제품을 매매하는 경영방식을 선택하고 있다. 물류네트워크 상에서 물류창고는 적절한 위치에서 적절한 시기에 효과적으로 운영하므로 부가가치를 창출하여 효율성 제고를 통한 경쟁력 강화방안이 FTA에 대한 대응방안이 되고 있다. 물류기업은 물류창고의 역량을 강화하기 위하여 구조적 경쟁력 방안을 강화하므로 국내의 물류창고의 운영 효율성과 생산성 취약하므로 효율성과 생산성 분석은 의미가 있다. 본 연구에서는 2005년-2009년까지 지역별 물류창고 효율성 분석을 하였으며 동태적 안정성검증에서는 서울특별시, 부산광역시, 대구광역시, 전라북도가 안정적이며 생산성 변화를 측정한 결과는 광주광역시와 제주도의 경우 4기간 평균 생산성지수는 각각 2.553과와 2.602로 생산성이 약 255%와 260% 증가하였다. Catch-up 분석 해석 결과는 대전광역시, 전라북도, 경상남도 경영상 효율성의 악화가 이루어졌으며 Frontier 분석 해석결과는 서울특별시가 가장 낮고 광주광역시가 높은 기술진보가 이루어졌음을 알 수 있다.