• 한국콘텐츠학회논문지
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• 제17권6호
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• pp.1-8
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• 2017

본 논문에서는 스마트 시대에 맞게 기존 수준측량 장비를 개선한 스마트 수준측량 장비를 개발하였다. 하드웨어부분과 소프트웨어 부분으로 나누어 개발하였으며, 다양한 수준측량 장비를 이용하여 수준점 결과 값에 대한 검측을 실시해 보았다. 수준측량의 검측방법은 국가기준점(UO992)-A, 수준점(15-00-06-24)-B, 수준점(15-00-06-23)-C로 선정하여 왕복수준측량을 실시하였다. 그 결과 오토레벨과 디지털레벨의 경우 오차범위 내의 안정된 결과 값을 얻을 수 있었고, 스마트 레벨의 경우 A-B구간에서 약 24mm, B-C구간에서 약 26mm가 발생되었다. 이는 하드웨어의 완성도가 부족한 부분이 있었고, 상대적으로 많은 설치횟수 등에 따른 오차가 발생된 것으로 판단된다. 또한 거리구간별 스마트레벨 수준측량을 실시해 본 결과 평균 RMSE가 약 46mm정도 발생되었다. 이 역시 짧은 구간에서는 적은 오차가 발생되었지만 거리가 멀어짐에 따라 오차가 누적됨을 알 수 있었다. 향후, 정밀도의 향상부분에 대하여 보다 심도 있는 연구를 추진하여 실생활에 사용가능하도록 향상할 수 있다면 다양한 산업분야에서 응용할 수 있을 것으로 판단된다.

• 한국항해항만학회지
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• 제43권6호
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• pp.469-474
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• 2019

세계의 주요 자원중 하나인 원유는 산업의 가장 기초적인 부분을 담당하고 있으며 원유를 통하여 많은 액체화물이 생산되고 있다. 석유화학단지들은 인근의 항만을 통해 원유를 수입후 정제를 통해 석유정제품, 화학생산공업품 등을 생산한다. 본 연구에서는 우리나라의 주요 석유화학단지와 인근에 위치한 액체화물 항만 간의 관계를 확인하고자 울산항, 대산항, 여수광양항을 선정하였다. 항만물동량 시계열 데이터를 이용한 분석을 실시하였으며 VAR 모형을 이용하였다. 이를 수행하기 위해 단위근 검정을 실시했으며 Granger 및 Toda-Yamamoto 인과 검정을 통하여 관계를 확인하였다.

• 한국의류산업학회지
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• 제13권6호
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• pp.966-971
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• 2011

This study is designed to develop programs that analyze the distance of clothes from human skin and cross-sectional body figures based on 3D human body scan data, and to verify accuracy and efficiency of the program so that it can be used for clothing fit evaluation and 3D human body research. The auto cross-sectional imaging program was developed by using Visual C++ and OpenGL, and the 3D human body scan data were adopted to measure the space between skin and clothing. The space measurements were obtained by two widely used programs, RapidForm and AutoCAD, and a program devised by the researchers of this study. Measuring time and space measurements from different programs were compared in order to verify accuracy and efficiency of the newly-devised program. As a result, no significant difference was found in the measurements. However, the required time to measure one cross section was different within the significance level of 0.05, and the differences become more remarkable as the number of measuring and the angle of space between skin and clothing increase. Therefore, the program developed by this study is expected to be useful for research on body shapes and fit evaluation based on 3D human body scan data in the fashion field.

• 자동차안전학회지
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• 제9권4호
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• pp.26-31
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• 2017

The current autonomous vehicle competitions are dominated by a few leading research institutions and universities. Since the leading research groups have been able to accumulate their knowledge and to develop their own algorithms for autonomous vehicle for many years, the technology gap seems too big for other followers to catch up with. On the other hand, recent researches predict that there would be a sharp rise in demand for engineers with background in autonomous vehicle technology. Therefore, it would be warranted to further expand the base of the academia and autonomous vehicle industry. In an effort to achieve this goal, it would be beneficial to hold a new format of autonomous vehicle competition event where undergraduate students can play a leading role. So, this study is to analyze the current autonomous vehicle competitions and thus to establish a strategic plan to develop a unique and improved competition event. This study investigates the pros and cons of the domestic and international autonomous vehicle competitions. Based on the analysis for the current autonomous vehicle competitions, the authors suggest a strategic plan to initiate an autonomous vehicle competition. To implement the aforementioned strategic plan, it is necessary to develop a systematic environment where the education and communication are actively available. Through the strategic plan the authors propose, the newly launching autonomous vehicle competition will able to encourage the undergraduate students and professors to dive in the cutting-edge technology thereby increasing technology competitiveness.

• 대한전자공학회논문지TC
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• 제45권3호
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• pp.53-60
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• 2008

최근 들어, 광 기록 저장 시스템을 위한 다양한 기록 방식들이 연구되고 있다. BD (Blue-ray Disc)나 HD-DVD (High-Definition Digital Versatile Disc) 기록 방식의 표준화가 진행된 후에 차세대 광 기록 방식에 대한 관련 업계의 초점이 모아지고 있다. 이러한 차세대 광 기록 저장 시스템 가운데 기술의 호환성이 장점인 Super-RENS (Super-Resolution Near field Structure) 기술이 유력한 후보 중 하나이다. 본 논문에서는 HOS (Higher-Order Statistics)에서 사용되는 bicoherence 테스트를 통해 Super-RENS read-out 신호의 비선형성을 분석하고, Super-RENS 시스템의 비선형 모델링을 위해 신경망을 적용하고자 한다. 본 논문에서 고려하는 모델 구조는 NARX (Nonlinear AutoRegressive eXogenous) 모델이다. 모의실험 결과, Super-RENS read-out 신호의 비선형성이 존재함을 알 수 있었고, Super-RENS 시스템의 비선형 모델링을 위해 신경망이 유용하게 활용될 수 있다는 가능성을 확인하였다.

• 자동차안전학회지
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• 제8권4호
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• pp.24-30
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• 2016

In Korea, the Vehicle Dismantler and Recycler industry is supervised by the Ministry of Land, Infrastructure and Transport under the Automobile Management Act. Also, Korean Automotive recycling businesses are supervised by the Minister of Environment under the Resource Recirculation Act. The main concern of the Minister of Environment is how the wastes from Dismantled vehicles will be environmentally removed, stored, treated, recycled or disposed. In 2000, the European Union (EU) adopted the End-of-Life Vehicles Directive (2000/53/EC) which required Members to ensure the collection, treatment and recovery of end-of-life vehicles (ELVs). The Directive, the most tightly regulated and precautionary legal systems, required that the last owner of a vehicle could drop off the ELV at an authorized treatment facility and that the producers of the ELV should pay the cost of the program. The adoption of the ELVs directive has led the development of Automotive Dismantler and Recycler networks to reuse, refurbish, remanufacture, recycle and recover parts and materials embedded in ELVs. Also, the ELVs directive which has had an insignificant impact on Korean manufacturers has strong presence in the European market and has been successfully externalized on them. The Korean manufacturers not only achieve the 85% recycling target set by the ELVs directive but also meet the Extended Producer Responsibility (EPR) which requires manufacturers to contribute dismantling process. In order to improve the Korean vehicle dismantling and recycling system, the Automobile Management Act and the Resource Recirculation Act should be harmonized. Particularly the roles of the Ministry of Land, Infrastructure and Transport and the Minister of Environment should be sharply divided. Like Japan, the ELV management needs to be highly centralized, regulated, and controlled by the ministry specialized in Vehicle, namely the Ministry of Land, Infrastructure and Transport and the sub organizations. Like EU Members, recovery, reuse, and recycling must be distinguished. Recovery is defined as the final productive use of the parts and materials embedded in ELVs, which includes reuse and remanufacture of parts and recycling of the other materials. Dismantling process and reuse and remanufacture of parts must be governed by the Ministry of Land, Infrastructure and Transport. For environmental recycling or disposal of waste materials, such as CFCs, glass and plastic material, and toxic substances, governmental financial support system should be in place.

• 자동차안전학회지
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• 제11권4호
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• pp.28-38
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• 2019

In the world, traffic accidents and environmental pollution caused by the increase of vehicles are becoming a serious social problem. According to the 2016 data published by the Korea Highway Traffic Authority, Korea owns 49.9 vehicles per 100 people. This is the 28th largest number among the 35 OECD member countries. In addition, the number of deaths from traffic accidents in Korea totaled 4,292, of which 1,714 were caused by traffic accidents involving vehicles and pedestrians. To reduce these human casualties, the automotive industry is constantly working on the development and commercialization of Adaptive Driver Assist System (ADAS). ADAS is the system providing convenience and safeness for drivers. In general, ADAS consists of Autonomous Emergency Braking (AEB), Highway Driving Assist (HDA), Adaptive Cruise Control (ACC), Lane Keeping Assist System (LKAS). Among them, the AEB detects the possibility of collision by the vehicle itself and plays a role of avoiding the collision or reducing the damage through active braking. For such AEB, Euro NCAP has been developing test-evaluation methods for the vulnerable since 2017. Therefore, In this paper analyzes the scenario of Euro NCAP VRU Test Protocol v3.0.1, which will be established in 2020, and proposes test conditions according to the Korean road traffic law. In addition, the reliability of the proposed scenario and test conditions was verified by comparing and analyzing the proposed theoretical evaluation formulas and actual test results.

• 복식문화연구
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• 제25권3호
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• pp.270-284
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• 2017

This study aimed to create 3D-printed insoles for flat-footed senior men using 3D systems. 3D systems are product-manufacturing systems that use 3-dimensional technologies like 3D scanning, 3D modeling, and 3D printing. This study used a 3D scanner (NexScan2), 3D CAD programs including Rapidform, AutoCAD, SolidWorks, Nauta+ compiling program, and a 3D printer. In order to create insoles for flat-footed senior men, we analyzed horizontal sections of 3D foot scans We selected 20 flat-footed and 20 normal-footed subjects. To make the 3D insole models, we sliced nine lines on the surface of the subjects' 3D foot scans, and plotted 144 points on the lines. We calculated the average of these 3D coordinates, then located this average within the 3D space of the AutoCAD program and created 3D sole models using the loft surface tools of the SolidWorks program. The sole models for flat feet differed from those of normal feet in the depth of the arch at the inner sideline and the big toe line. We placed the normal-footed sole model on a flat-footed sole model, and the combination of the two models resulted in the 3D insole for flat feet. We printed the 3D modeled insole using a 3D printer. The 3D printing material was an acrylic resin similar to rubber. This made the insole model flexible and wearable. This study utilized 3D systems to create 3D insoles for flat-footed seniors and this process can be applied to manufacture other items in the fashion industry as well.

• 정보보호학회논문지
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• 제26권6호
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• pp.1513-1526
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• 2016

금융회사가 전자금융 서비스를 제공하기 시작하면서 전자금융 서비스는 다양화 되었고 전자금융 사용은 지속적으로 증가하고 있다. 이에 금융회사는 안전한 전자금융서비스를 제공하기 위하여 금융 보안정책을 적용하고 있으나 전자금융 사고는 계속해서 지능화되고 증가하고 있는 상황이다. 금융감독기관은 최근 인터넷 전문은행 등장과 핀테크 활성화와 더불어 비대면 실명확인 제도 신설 및 전자금융 거래를 통한 자금이체 시 공인인증서 또는 일회용비밀번호 의무사용 폐지 등의 규정을 개선하여 이용자의 편리함을 추구하는 동시에 금융회사에게는 이상금융거래 탐지 시스템 고도화 및 개선을 통한 불법이체 사고 방지를 권고하고 있다. 본 논문에서는 금융회사 제반 상황에 적합한 블랙리스트기반 자동화 탐지 기법을 제안하고 블랙리스트 정보를 레벨링하여 보안레벨에 따른 블랙리스트기반과 통계모델을 연동한 실시간 이상금융거래 탐지 기법을 제안하며, 기존 전자금융 사고유형 분석을 통한 특징적 패턴에 따른 실시간 이상금융거래 탐지기법의 대응 모델을 제안하고자 한다.

• 대한전자공학회논문지TC
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• 제45권12호
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• pp.90-96
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• 2008

최근 들어, 광 기록 저장 시스템을 위한 다양한 기록 방식들이 연구되고 있다. BD (Blu-ray Disc)나 HD-DVD (High-Definition Digital Versatile Disc) 기록 방식의 표준화가 진행된 후에 차세대 광 기록 방식에 대한 관련 업계의 초점이 모아지고 있다. 이러한 차세대 광 기록 저장 시스템 가운데 기술의 호환성이 장점인 Super-RENS (Super-Resolution Near Field Structure) 기술이 유력한 후보 중 하나이다. 본 논문에서는 Super-RENS 디스크를 위한 신경망 기반의 비선형 등화기 (NNEQ)를 제안하였다. 비선형 심볼간 간섭 (Inter-Symbol Interference : ISI)을 제거하기 위해 신경망의 한 종류인 NARX (Nonlinear AutoRegressive eXogenous) 모델을 적용하였다. Super-RENS 디스크로부터 획득한 RF 신호 샘플들을 사용하여 모의실험을 수행한 결과, 제안된 비선형 등화기의 성능은 비트오율 측면에서 등화기가 없는 경우나 기존의 Limit-EQ 보다 우수한 성능을 나타내었다.