• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.2
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• pp.725-734
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• 2014

Modernization projects are actively underway to replace conventional logistics equipment for the development of the 21st century logistics management system. The modernized logistics system is expected to expand to each troops on future. In this paper, we deal with simulation of automated logistics center to analyse the current system. Especially, the alternative to the same scale is designed based on needs of military distinctiveness. As a result, it can be effectively compared the current system. The result obtained in this design process is comprehensively analyzed by the AHP(Analytic Hierarchy Process). The proposed method in this study is allowed to cost-effectively evaluate current and future automated logistics center. And, that is expected to contribute to modernization projects of the military logistics system.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.165-166
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• 2020

Internationally, manufacturers attempted respectable portion of in-house logistics to satisfy end users and decrease manpower to compete for manufacturing price and quality optimization. Mostly, manufacturers operate variety of facilities such as collaborative robots, conveyor, etc. based on PLC. To achieve it, manufactures shall operate the optimized number of manufacturing processes with logic controlled by computer to reduce human errors. In prior to it, manufacturing industry still own plenty of fields which have not yet been adjusted with automation. For example, we shall put in-house logistics on the issue. This study focuses on manufacturing industry, evaluate efficiency, costs, etc. in all aspects and suggest alternatives by analysis SWAT and OEE, let alone reason of weakness.

• Journal of Korea Port Economic Association
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• v.36 no.3
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• pp.99-114
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• 2020

Overseas advanced ports are promoting smartification, as well as full automation of the terminals surrounding container terminals. A smart port can be defined as a comprehensive concept that pursues increased operational efficiencies, maximization of profit, efficient use of energy, and construction of eco-friendly ports with the introduction of fourth-industrial-revolution technology, including port automation. However, Korea is making efforts to introduce fourth-industrial-revolution technology into ports, but indications are that they are somewhat insufficient compared to advanced ports abroad. Therefore, this study conducted a survey about operators and users of container terminals in Gwangyang Port by deriving the factors determining the introduction of smart ports, such as cost, service, time, safety, and environment, from previous studies. This study analyzed the factors determining the introduction of smart ports and moderating effects when the adjustment variables of operators and users were applied to the pros and cons. As a result of the analysis, it was found that port operators and users have a moderating effect on cost, time, safety, and environmental factors, but not on service factors. These results indicate that port operators try to reduce costs through efficient operation, time management, and by reducing safety accidents by building smart ports, but analysis showed that the negative effects of smart ports have affected port users. The results of this study were derived through a moderated regression analysis and suggested implications for introducing smart ports in the conclusion.

• Korean Journal of Construction Engineering and Management
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• v.19 no.2
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• pp.117-125
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• 2018

The primary objectives of this study are to develop a detail design of automated PHC pile head cutting machine and structural stability analysis of detail design that improves the conventional head cutting work in safety, quality, and productivity. For this, the following research works are conducted sequentially; 1)literature review and field study, 2)expert survey and interview, 3)selection of core technology using AHP analysis, 4)deduction of detail design 5) verification of structural stability. As an outcome, it is analyzed that gripper and gripper bearing shaft are structurally stable. Their maximum stresses are shown as 15.93%, 10.58% compared to their yield strength respectively. The results of detail design and structural stability analysis in this study will be utilized for the actual development of the automated PHC pile cutting machine prototype.

• Journal of Korean Library and Information Science Society
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• v.53 no.1
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• pp.149-170
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• 2022

This study aims to present a revised draft of KORMARC bibliographic format that was first revised in 2014. To this end, data collection and analysis methods are as follows. First, the opinions of cataloging working groups for revision of KORMARC including the National Library of Korea (NLK) and KERIS were collected and analyzed. Second, work guidelines used in libraries or cooperative catalog systems were analyzed. Third, by comparing MARC21 update No.32 (June 2021) with the KORMARC bibliographic format, elements that need to be reflected in the KORMARC revision were derived. Finally, issues that have been raised in previous studies or that require further discussion were examined. Based on these analysis results, an outlines of the extension and deletion of KORMARC fields, subfields, and indicators, and supplementation of application guidelines and examples were derived. The final revision directions were finalized after collecting expert opinions, the working group reviews, and comprehensive opinions from the library community.

• The Journal of the Korea Contents Association
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• v.19 no.11
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• pp.365-374
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• 2019

Loss of Control in Flight(LOC-I) due to aircraft upset attitude has the highest air accident rate, and International Aviation Institute such as ICAO and FAA recommended flight crew to operate aircraft safely through UPRT(Upset Prevention & Recovery Training) program. ICAO has selected Loss of Control(LOC) as key safety indicator, and recommended to respond using TEM(Threat and Error Management). However there are not much specific treats and errors classified for UPRT programs using real TEM based on evidences. This study intends to consider the importance of UPRT through the introduction of UPRT and accident analysis using TEM. Typical upset accidents were classified to common threats as IFR, inadequate training, Automation surprise, and inexperienced copilots. The common errors were cross-check, speed and altitude deviation, callouts, communication, thrust and stall action fail. The undesired aircraft states were inadequate automation mode, Deviation of speed and vertical, stall, and crash. These suggest areas to improve UPRT.

• Korean Journal of Construction Engineering and Management
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• v.14 no.5
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• pp.55-64
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• 2013

The complexity of constructing medical institutions is higher than that of general buildings, and many change orders in the design and defect repairs in the construction phase are required due to strict government regulations. The priority control of constructions and impact factors of medical institutions were analyzed in this study, and difficulties in the control in the design and construction phase were identified. First, the priority management factors that were identified were as follows: architecture, facilities, and electricity. Second, 1) priority management in constructions and factors resulting in change orders and 2) priority management in constructions involving defect repair were analyzed. Third, the importance recognized by the construction managers were analyzed. The priority management in constructions and factors that were recognized by the construction manager were deducted as having low importance, although there were many change orders and defects. The work of finishing, wall building, joining, office automation and communication function, and lighting were analyzed in the design phase, and waste, the office automation and communication function, ceilings, contamination control, and plumbing were analyzed in the construction phase. The results showed that there will be a decrease in change orders and defects if the concentration of the manager was elevated and priorities were managed.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10b
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• pp.430-432
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• 2001

일반적으로 안과 의사들과 안경사 등을 포함하는 시각 관련 전문가들은 시력 피검자에 대한 굴절력 측정시 약 30% 이상의 오류율을 가진다고 한다. 이는 검사를 행하는 전문가의 비 숙련도에 기인한다기보다는 그만큼 시각 관련 측정이 유동적이고 민감해서 정확한 측정값을 얻어내는 것이 어렵다는 것을 말해주는 것이다. 만약 자동화된 시스템이 광학계로부터 나오는 영상을 이용하여 내부 처리를 거친 후 정확한 시각 측정치를 검사자에게 알려줄 수 있다면 잘못 측정되는 측정 횟수를 크게 줄일 수 있을 것이다. 본 연구는 형태학적 필터링(morphological filtering)과 그레이-레벨의 신호 강조(signal enhance) 기술들을 이용한 자동 시각 굴절력 측정 시스템을 개발하였다. 본 시스템에서는 광학계로부터 도출된 영상으로부터 첫째로 형태학적 필터링 처리를 행한다. 이 과정은 처리가 어려운 원 영상을 좀 더 다루기 쉬운 상태로 바꿔주는 역할을 하게 된다. 둘째는 일차 처리된 영상에 가해주는 그레이 수준 한계 기법을 통한 신호 강조 기법으로서 이는 영상의 그레이 값 분포가 다양함으로 인해서 발생되는 오차를 줄이기 위해서 사용된다. 그리하여 본 시스템은 정확한 측정값 도출이 어려운 시각 영상에 적용되어 효과적으로 오차를 줄임으로써 보다 효율적인 시각 측정을 가능하게 하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11a
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• pp.691-694
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• 2002

본 논문은 자동 시각 굴절력 곡률계의 전자 부문에 연동될 곡률 측정 알고리즘을 소개한다. 만약 자동화된 시스템이 광학계로부터 나오는 영상을 이용하여 내부 처리를 거친 후 정확한 시각 측정치를 검사자에게 알려줄 수 있다면 잘못 측정되는 측정 횟수를 크게 줄일 수 있을 것이다. 본 연구는 형태학적 필터링(morphological filtering)과 그레이-레벨의 신호 강조(signal enhance) 기술들을 이용하여 자동 시각 굴절력 곡률계에 연동될 각막 곡률과 굴절력 측정 알고리즘을 개발하였다. 알고리즘에서는 광학계로부터 도출된 링 모양 광원의 화상을 처리하기 위해서 새로운 방법을 사용하는 대신에 구면 굴절력 측정을 위해서 6 개의 점으로 구성된 화상을 처리하는 방식으로 변형 적용시킨다. 이 때 링의 띠를 6 개의 덩어리 점으로 변형하는 과정만을 제외하면 구면 굴절력 영상을 처리하는 방식과 같게 된다. 이는 알고리즘의 간결화와 측정 시간을 줄이는 효과를 얻게 된다. 그리하여 본 각막 측정 알고리즘은 정확한 측정값 도출이 어려운 시각 영상에 적용되어 효과적으로 오차를 줄임으로써 보다 효율적인 각막 측정을 가능하게 하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1027-1030
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• 2015

하드웨어 디자인 설계에서 초기 단계의 설계 오류 발견은 개발 비용 감소 및 설계 시간 단축 측면에서 그 효과가 매우 크다. 이러한 초기 설계 오류 발견을 위한 대표적인 방법으로는 정형 검증(formal verification)이 있으며, Cadence SMV(Symbolic Model Verifier)는 정형 검증을 위해 Verilog HDL(Hardware Description Language)을 SMV로 자동 변환 해주는 장점이 있지만, 사건 기반 구조(event based structures)의 sensitivity list에 대한 지원을 하지 않는 한계가 있다. 이에 본 논문에서는 Cadence SMV에서 디지털회로(digital circuit) 중 하나인 조합 논리회로(combinational logic circuit)를 sensitivity list가 고려된 검증이 가능하도록 하는 방법을 제안한다. 신뢰성 있는 실험을 위해 본 논문에서는 제안하는 방법의 일반적인 규칙을 도출하였고, 도출된 규칙이 적용된 SMV 파일을 생성하는 자동화 프로그램을 구현하여 실험하였다. 실험결과 제안한 방법을 적용한 경우 기존 Cadence SMV가 발견하지 못한 설계상의 오류를 발견할 수 있었다.