• 한국항해항만학회지
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• 제31권1호
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• pp.7-14
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• 2007

최근 남북한 경제교류 증대, 개성공단의 급속한 발전 등에 따라 남북한 물류도 급속히 증가하고 있어 기존의 육상 수송뿐만이 아니라 다양한 형태의 수송로 확보가 필요한 실정이다. 한편 유럽 및 미국 등에서는 항만 및 적하역 시설의 이용이 용이하며 초기 투자비용이 저렴한 바아지시스템이 화물 수송에 널리 이용되고 있다. 본 연구에서는 먼저 개성공단의 현황과 화물운송에 대하여 고찰하고 바아지시스템을 활용한 인천-개성(공단)간 후보 항로를 제안한다. 또한 인천-개성(공단)간 바아지 후보 항로에 대한 실해역 조사와 현장 답사 등을 통하여 바아지 운항 가능성에 대한 기술적 타당성을 검토한다. 마지막으로 인천-개성(공단)간 후보 항로(1)과(2)에 적합한 바아지시스템을 제안한다.

• 한국철도학회논문집
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• 제11권5호
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• pp.513-518
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• 2008

새로운 운송시스템은 기술개발뿐 아니라, 경제성 확보가 필수적인 요소이며, 튜브운송시스템은 현재 개발 초기 단계로서 다양한 기술이 제안피고는 있으나 세계적으로 상용화된 사례는 없는 실정이다. 따라서 튜브운송 시스템의 개념설계 단계에서부터 경제성을 고려한 성능조건을 설정하고 이를 설계 요구조건에 반영함으로써 사회적으로 유의미한 기술의 개발이 가능할 것으로 생각된다. 국내에서 과거 대중교통문제를 해결하기 위하여 신 교통수단을 도입하였으나 도입당시 기술적 문제 및 경제성을 고려하지 않음으로 경쟁력 있는 교통수단이 되고 있지 못한 실정이다. 그러므로 본 연구에서는 튜브운송시스템의 개념설계를 위한 설계 요구조건 확립을 위하여 경제성을 고려한 튜브운송시스템의 성능조건을 도출고자 하였다. 이에 우선적으로 타당성 분석방법론을 검토하고 이에 따른 비용/편익을 산출하였으며 수단간 비교분석 및 사례분석을 통하여 화물운송을 위한 튜브운송시스템 최소 성능조건을 도출하였다.

• 산업경영시스템학회지
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• 제44권3호
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• pp.214-229
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• 2021

There is an increasing need for complex and large projects to be carried out quickly. As the duration, size, and cost of the project increase, concerns about project failure are also rising. Finding factors that hinder the performance of an effective project and eliminating them in advance or controlling and managing them more effectively can be a more direct way to secure the success of the project. Previous studies have identified compositional dimensions that are classified according to attributes, covering the various obstacles that affect the success of the project through existing literature. It is a follow-up to previous research. Using DEMATEL techniques, we would like to propose to explore the appropriate measures that an entity and organization can take by identifying the causality between factors through cross-impact analysis of project disabilities and even presenting factors that may arise when they are identified. As a result of the analysis, according to the indicators to evaluate the importance, 8 factors were found to be relatively important factors, excluding the factors that Failure of project feasibility analysis and Technical environment change. In addition, 5 factors were found to be causative factors; Technical environment change, Unclarity project plan, Strategic consistency error, Inaccuracy of requirement definition, and Failure of project feasibility analysis. In contrast, the remaining 5 factors were found to be the result factors; Lack of benefits realization, Negative attitude of top management, Stakeholder conflict, Difficulty of process management, and Disturbance of communication.

• 산업경영시스템학회지
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• 제41권4호
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• pp.111-122
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• 2018

The private sector is currently reviewing the feasibility of the project or deciding economic policies by analyzing the economic ripple effects. However, the arms acquisition project focuses on the need for the national defense weapons system by analyzing the costs and the effectiveness of the analysis and reviewing the necessity and feasibility of the project. In order to analyze the economic ripple effects, KB (the Bank of Korea) prepares and publishes an analysis table of industrial associations in a given unit. IAAR (the industrial association analysis report) is difficult to apply directly to the defense weapons system. Therefore, research on the economic ripple effects applicable to the defense arms procurement project was needed. In this study, we propose the generic methodology for estimating economical and technical ripple effects resulted in acquiring new weapon systems. Based on the analysis of inter-industrial relations, economical ripple effects are estimated with production inducing effects, value-induced effects, employment-induced effects and export-induced effects. Also, the technological ripple effects are estimated with technological intensity represented by investment cost in research and development. To show the validity of proposed methodology, a case study of acquiring new weapon systems such as GR (guided rocket), destroyer, and helicopter is accomplished. From the case study, it is concluded that these economical & technological ripple effects can be used as a reference to decision making in the course of acquiring major future defense weapons systems.

• 상하수도학회지
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• 제36권2호
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• pp.59-79
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• 2022

Conventional wastewater treatment plants (WWTPs) do not fully remove micropollutants. Enhanced treatment of sewage effluents is being considered or implemented in some countries to minimize the discharge of problematic micropollutants from WWTPs. Representative enhanced sewage treatment technologies for micropollutant removal were reviewed, including their current status of research and development. Advanced oxidation processes (AOPs) such as ozonation and UV/H₂O₂ and adsorption processes using powdered (PAC) and granular activated carbon (GAC) were mainly discussed with focusing on process principles for the micropollutant removal, effect of process operation and water matrix factors, and technical and economic feasibility. Pilot- and full-scale studies have shown that ozonation, PAC, and GAC can achieve significant elimination of various micropollutants at economically feasible costs(0.16-0.29 €/m³). Considering the current status of domestic WWTPs, ozonation and PAC were found to be the most feasible options for the enhanced sewage effluent treatment. Although ozonation and PAC are all mature technologies, a range of technical aspects should be considered for their successful application, such as energy consumption, CO₂ emission, byproduct or waste generation, and ease of system construction/operation/maintenance. More feasibility studies considering domestic wastewater characteristics and WWTP conditions are required to apply ozonation or PAC/GAC adsorption process to enhance sewage effluent treatment in Korea.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제25권5호
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• pp.406-412
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• 2022

Purpose: The role of endoscopic retrograde cholangiopancreatography (ERCP) in the management of hepatobiliary and pancreatic diseases in the pediatric population was not well defined until recently. Our aim was to determine the feasibility, outcomes, and safety of ERCP in a local pediatric population, particularly using standard adult endoscopes and accessories. Methods: This retrospective study was conducted at the National Hospital of Sri Lanka. Pediatric patients (aged <16 years) who underwent ERCP from January 2015 to December 2020 were included in the study. Data, including patient demographics, indications for the procedure, technical details, and associated complications, were collected from the internal database and patient records maintained at the hospital. Results: The study included 62 patients who underwent a total of 98 ERCP procedures. All the procedures were performed by adult gastroenterologists using standard adult endoscopes and accessories. The mean age was 11.01±3.47 years. Pancreatic diseases were the major indications for most of the procedures (n=81, 82.7%), with chronic pancreatitis being the most common. Seventeen procedures (17.3%) were carried out for biliary diseases. Overall cannulation and technical success rates were 87.8% and 85.7%, respectively. Stent placement was the most common therapeutic intervention (n=66; 67.4%). Post-ERCP pancreatitis was the most common complication, occurring in eight patients (8.2%). Conclusion: ERCP can be successfully and safely performed in pediatric populations using standard adult endoscopes and accessories with complications similar to those of adults. Adult ERCP services can be offered to most pediatric patients without additional costs of pediatric endoscopes and accessories.

• 한국자원리싸이클링학회:학술대회논문집
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• 한국자원리싸이클링학회 2004년도 춘계임시총회 및 제23회 학술대회
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• pp.109-113
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• 2004

본 연구에서는 현재 농촌 지역에서 광범위하게 사용되고 있으나 거의 재활용이 안 되어 방치상태에 있는 농업용 폐비닐을 이용하여 시멘트 제조를 위한 고형 연료를 제작할 수 있는 이동식 장치를 개발하려 하였다. 이를 위해 재생연료의 연소 특성 및 2차 오염 발생여부에 대해 조사했으며, 1cm 이하 알갱이 형태의 고형 연료를 제조 가능한 이동식 장치를 개발하였다. 또한 기존의 시멘트 예열탑에서의 투입 방식에서 벗어나, main burner에 적용기술 개발을 통해, NOx 및 O2 발생량의 감소가 나타났고, 0.5ton/hour 투입 시, 0.2-0.3ton/hour 정도 Coal량이 감소하는 연료 단가 절감 효과를 얻을 수 있었다.

• 대한의용생체공학회:의공학회지
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• 제41권2호
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• pp.75-83
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• 2020

In large-scale hospitals, the department of biomedical engineering should always provide quick repair service for damaged medical devices to guarantee continuous patient treatment. However, in actual circumstances, there are so many time-consuming issues that delays device repair for weeks or even months; therefore, it is required to prepare alternative ways for quick repair service. In this study, we first mentioned about the regulation issues in Korea about the 3D printing-based medical device repair, and then introduced the results of our preliminary study that evaluated the feasibility of 3D printing-based medical device repair before real-field application. Results of the study demonstrated that, in all of the 23 cases, parts for repair that were manufactured by 3D-printing were successfully fixed and connected to the main body of the original device, and showed sufficient rigidity for protecting internal parts of the device. Considering the experimental results, medical device repair by applying 3D printing technology can be a promising alternative in cases when regular repair process is not available or takes too much time.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.460-464
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• 2003

아파트 재건축사업은 신축사업과 달리 재건축조한의 설립 등, 사업시행의 절차가 복잡하고, 개발사업의 타당성을 조사할 능력이 없는 비전문가들로 구성된 조합이 사업주체가 되어 자율적으로 추진하는 민간사업으로 재건축사업의 타당성을 분석하고 검증하는 객관적인 절차가 없는 상태에서 설계사, 시공사 등 많은 주체들이 참여함에 따라 각 주체별 이해관계가 복잡하게 얽혀있고 오해와 불신 비리와 분쟁 등 주민마찰의 온상이 되어왔다. 본 연구는 아파트 재건축사업 타당성조사 분석모델 개발을 위한 기초적인 연구로서 아파트 재건축사업을 수행한 경험이 있는 공공 및 민간업체를 대상으로 사업성분석의 절차와 분석항목, 사정기준을 조사하여 각 분석항목 및 분석정보의 흐름을 IDEF0 방법론을 이용하여 프로세스를 모델링하였다.

• 한국정밀공학회지
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• 제33권3호
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• pp.191-198
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• 2016

Traceability is essential in modern automotive manufacturing. Among existing technologies, RFID is the most promising choice for this purpose. However, due to the harsh conditions of production lines, especially in the paint shop, automobile OEMs would require expensive dedicated RFID tags and readers, which are incompatible with standard RFID technologies. Unlike the manufacturing industry, the logistics industry uses UHF label tags for track and trace, which provides high performance and a low price. Recently, this technology has improved to the extent that it can be used in harsh conditions such as on metal parts or in liquid. Herein, we assess the technical, operational, and economic feasibility of UHF label-tag technology for seamless end-toend traceability. Based on prototyping, lab/field tests, and cost-benefit analysis, we have proven that the single disposable UHF tags can successfully replace the problematic and expensive tags used in most domestic automobile OEMs today.