• Corrosion Science and Technology
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• 제9권4호
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• pp.153-158
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• 2010

Electrical appliances such as audiovisual equipment and personal computers have recently had heat and electromagnetic problems. In order to solve those problems, 'High heat absorbing pre-painted steel sheet (hereinafter referred to as PSS)', 'High electromagnetic shielding PSS' and 'High heat absorbing and high electromagnetic shielding PSS' have been developed. In this paper, the heat characteristics and electromagnetic shielding properties of PSS are investigated by methods that use enclosures and their mechanisms are discussed. It was found that 'High heat absorbing PSS' and 'High heat absorbing and high electromagnetic shielding PSS'could reduce the heat problem. The mechanism of the heat characteristics was presumed for the high heat absorptivity of the back coating inside the enclosure. And it was also found that 'High electromagnetic shielding PSS' and 'High heat absorbing and high electromagnetic shielding PSS' could shield electromagnetic waves well. The mechanism of the electromagnetic shielding properties was considered for the low transfer impedance of the back coating inside the enclosure. 'High heat absorbing PSS' and 'High electromagnetic shielding PSS' have been adopted as materials for electrical appliances and 'High electromagnetic shielding and high heat absorbing PSS' have been tested for that purpose.

• 한국정보통신학회논문지
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• 제22권12호
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• pp.1577-1588
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• 2018

최근, 선박에 탑재된 장비로부터 수집되는 정보를 분석하여 운항 및 유지보수 지원 목적으로 활용하기 위한 여러 연구가 진행되고 있다. 항해통신장비의 인터페이스의 경우 상대적으로 표준화가 잘 이루어져 있으나 선박 기관부 및 기타 장비부의 인터페이스는 여러 이유로 인해 표준화가 되어있지 않아 데이터 교환 및 관리에 많은 한계가 존재한다. 이러한 문제를 극복하기 위한 목적으로 해상 필드 데이터 공유를 위한 선박 데이터 서버에 관한 표준인 ISO 19847과 선박 기계 장비부 데이터 표준인 ISO 19848이 현재 제정 막바지 단계로 최근 공표를 앞두고 있다. 본 논문에서는 이러한 두 가지 국제표준의 DIS 버전을 기반으로 선박 기관부 데이터 관리 플랫폼을 개발하고, 이를 기반으로 필드 데이터 교환에 관한 실험을 수행하는 것에 관한 내용을 다룬다. 이를 위해서 관련연구 및 ISO 19847/19848의 요구사항을 분석하고, 요구사항을 충족하는 선박 데이터 플랫폼 아키텍처를 설계하며, 각 구성요소를 개발하여 유용성을 검증한다.

• 대한토목학회논문집
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• 제30권2D호
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• pp.163-169
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• 2010

건설 계측 및 계측업은 IT산업 및 정보통신기술의 급격한 발달과 함께 빠르게 발전하였다. 그러나 건설 계측이 제대로 정착하기 위한 제도적 및 법적 뒷받침은 현실적으로 아주 미비한 실정이다. 따라서 건설계측분야의 현황에 대한 설문조사 결과를 반영하여 발전 방안을 검토하였다. 건설 계측 및 계측업이 발전하기 위한 방안으로 한국건설계측협회 및 학회 설립 검토, 건설계측업 지정을 위한 관련법 검토, 건설계측품셈 제 개정 검토, 건설계측관련 설계기준 및 시방기준 제 개정 검토, 건설계측 전문인력 실무교육기관 지정 검토, 계측기기의 성능검사전문기관 지정 검토, 계측기기의 하자담보책임기간 검토, 계측기기의 손망실 비율 반영 검토 등의 발전 방안을 제안하였다.

• 한국군사과학기술학회지
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• 제18권3호
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• pp.244-252
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• 2015

This paper describes design and construction results of the measurement system developed on the purpose of measuring properties of AC magnetic field sensors used in the weapon system. The system for measuring the properties of AC magnetic field sensors consist of 3-axis helmholtz coil, signal generator, signal amplifier, sensor data acquisition unit and AC magnetic field sensor property measurement & analysis equipment including the operating software. By using this system, we can measure various properties of AC magnetic field sensor such as sensitivity, linearity and dynamic response in the frequency from 1 Hz to 10 kHz. Finally we also verified its performance by measuring the property of a MAG 639, standard magnetic field sensor of bartington instruments, with the developed measurement system.

• 한국항해항만학회지
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• 제33권3호
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• pp.199-206
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• 2009

2007년 초 1만1천TEU 엠마머스크호의 첫 등장을 필두로 향후 5년 이내 1만5천TEU급의 극초대형선 등장이 예견됨에 따라 항만관련 기술들의 고생산성화, 첨단화, 자동화, 효율화는 필수적으로 동반되는 미래의 요구사항으로 대두되고 있다. 이러한 급격한 항만환경변화에 대응하기 위해 세계 선진항만운영사와 기업들은 항만산업시장 선점과 기술개발경쟁을 치열하게 벌이고 있다. 국내에서는 기존에 체계적, 분석적, 세부적인 항만기술개발 로드맵이 없어 국가적 항만기술개발 정책의 효율적 추진과 국내 항만관련 산업의 활성화를 이루지 못하고 있다. 따라서 본 연구에서는 세계 항만환경변화 추세를 바탕으로 분야별 국내 항만기술의 개발과제 도출과 개발우선순위를 분석하였고, 분야별/기술별 개발시점에 따른 거시적 로드맵 및 분야별 개발기술에 대한 제품개발과의 연관 로드맵을 수립하였다.

• 한국신뢰성학회지:신뢰성응용연구
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• 제15권2호
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• pp.90-100
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• 2015

Reliability growth rate (or reliability growth curve slope) have the two cases of trend as a constant or changing one during the reliability growth testing. The changing case is very common situation. The reasons of reliability growth rate changing are that the failures to follow the NHPP (None-Homogeneous Poisson Process), and the solutions implemented during test to break out other problems or not to take out all of the root cause permanently. If the changing were big, the "Goodness of Fit (GOF)" of reliability growth curve to test data would be very low and then reduce the accuracy of assessing result with test data. In this research, we are using Duane model and AMSAA model for assessing test data and projecting the reliability level of complex and repairable system as like construction equipment and vehicle. In case of no changing in reliability growth rate, it is reasonable for reliability engineer to implement the original Duane model (1964) and Crow-AMSAA model (1975) for the assessment and projection activity. However, in case of reliability growth rate changing, it is necessary to find the method to increase the "GOF" of reliability growth curves to test data. To increase GOF of reliability growth curves, it is necessary to find the proper parameter calculation method of interesting reliability growth models that are applicable to the situation of reliability growth rate changing. Since the Duane and AMSAA models have a characteristic to get more strong influence from the initial test (or failure) data than the latest one, the both models have a limitation to contain the latest test data information that is more important and better to assess test data in view of accuracy, especially when the reliability growth rate changing. The main objective of this research is to find the parameter calculation method to reflect the latest test data in the case of reliability growth rate changing. According to my experience in vehicle and construction equipment developments over 18 years, over the 90% in the total development cases are with such changing during the developing test. The objective of this research was to develop the newly assessing method and the process for GOF level increasing in case of reliability growth rate changing that would contribute to achieve more accurate assessing and projecting result. We also developed the new evaluation method for GOF that are applicable to the both models as Duane and AMSAA, so it is possible to compare it between models and check the effectiveness of new parameter calculation methods in any interesting situation. These research results can reduce the decision error for development process and business control with the accurately assessing and projecting result.

• 수산경영론집
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• 제50권4호
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• pp.11-28
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• 2019

In this study, the Inter-Korea Fisheries Cooperation Project was divided into four categories: North Korea's Fisheries Infrastructure Development Project, Fisheries Cooperation Project, Human Exchange Project, and North Korea Fisheries Investment Project. First, North Korea's fisheries infrastructure development projects include North Korea's fisheries resource research project, it's fisheries resource development project, and joint enforcement on illegal operation of Chinese ships. Second, fisheries cooperation projects include the operation of the North-South common fish area in the West Sea, the fishing project in North Korea's East sea, and the import of North Korean seafood. Third, human exchange projects include training of aquaculture technicians in North Korea, technology transfer and training of fishing vessels, and boarding of North Korea's fisherman in Korean fishing vessels. Fourth, North Korea's fisheries investment projects include aquaculture facilities and aquaculture feed support, aquatic product processing facilities and technology transfer, and fishery equipment support. However, as international sanctions are maintained in the international community to North Korea, Inter-Korea Fisheries cooperation, however, should be promoted according to the level of easing of international sanctions as international sanctions are maintained in the international community to North Korea. First, North Korea's fisheries resource research project, North Korea's fisheries resource creation project, joint enforcement on illegal operation of Chinese ships, and operation of the common fish area in the West Sea can be promoted if international sanctions are maintained at present, promote North Korea's fisheries resource research project. Second, boarding of North Korean's fisherman in Korean fishing vessels, conducting the fishing project in North Korea's East sea, and importing North Korean seafood can be aided if commercial transactions are possible with North Korea. Third, South Korea will support aquaculture facilities and aquatic feed, fisheries processing facilities and technology transfer, fishery equipment support, training of fisheries and aquaculture technicians, fishery fishing technology transfer, and training of fisherman when a comprehensive economic cooperation project is possible with North Korea.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.197-204
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• 2007

현재 건설산업 현장에서 나타나는 숙련공 부족 현상, 고령화 문제, 안전상의 문제로 인한 노무 생산성 저하, 임금 상승으로 인한 채산성 악화, 품직 확보의 어려움 및 시공기술 경쟁력의 약화는 국내 건설산업이 해결해야 할 필수적인 당면과제이다. 한편 위험${\cdot}$유해한 작업환경에서 운용되는 토공장비나 매립지에서의 다짐 및 복토공사, 지뢰 및 폭탄 등에 의한 폭발의 위험이 있는 장소에서의 토공작업, 극한지 공사와 같은 환경에서의 공사수요도 점차 늘어가고 있다. 이와 같은 상황에서 토공의 생산성, 품질 및 안전도를 확보하기 위해서는 지능화된 자동화 장비를 이용하여 효율적으로 작업을 수행할 수 있도록 해야 할 필요가 있다. 따라서 본 연구에서는 지능형 굴삭시스템의 개발을 통하여 작업현장의 안전성을 제고하고 품질, 생산성 및 채산성을 향상시키고 선진외국에 비해 보다 진보되고도 경제성 확보가 가능한 건설 자동화 기술의 구현과 기술개발을 통해 국내 건설산업에 있어 새로운 Market Sector의 창출하고자 한다.

• 한국산학기술학회논문지
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• 제13권11호
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• pp.5434-5441
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• 2012

국내 철도 저밀도 지선구간에서는 주요노선에 적용되고 있는 고가의 지상설비들이 운용됨에 따라 적자로 운영되는 등 효율성 측면에서 문제가 되고 있어, 열차 차상에서 직접 선로변 설비를 제어할 수 있는 새로운 개념의 차상중심 열차제어시스템의 개발에 대한 필요성이 대두되고 있다. 이에 따라 본 논문에서는 국내의 앞선 정보통신기술(ICT)을 접목하여 지상설비를 최소화하는 동시에 기존 시스템을 대체가능한 차상제어시스템을 제안하였으며, 개념 및 상세설계 결과와 모형시험환경 구축을 통한 기능 확인 수행내용을 제시하였다.

• 한국산업융합학회 논문집
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• 제22권6호
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• pp.785-795
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• 2019

This paper is a study on the modeling of the quantity estimation model for offshore plant Material handling equipment in FEED(Front End Engineering Design) verification stage using system engineering approach which is an engineering design methods. The relevant engineering execution procedure is not systemized although the operation method and Material handling equipment selection with weight and space constraints is a key part of the FEED. Using the system engineering process, the stakeholder requirements analysis process, the system requirements analysis, and the final system architecture design were sequentially performed, and the process developed through the functional development diagram and Requirement traceability matrix (RTM) was verified. In addition, based on the established process, we propose a Material handling quantity estimation model and Quantity calculation verification Table that can be applied at the FEED verification stage and we verify the applicability through case studies.