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서동우,허승욱,Seo, Dong-Woo,Heo, Seung-Wook 한국유기농업학회 2010 韓國有機農業學會誌 Vol.18 No.3
This study focused on analysis of the satisfaction level of specialty shops for environment-friendly agricultural products (EFAP). To analyze the satisfaction level of EF AP, a series of household surveys were conducted. Questionnaire was prepared on the basis of the SERVQUAL model and the structural equation modeling was made on the basis of the contents surveyed. The main results of this study are summarized as follows. Firstly, tangibles structured with store clearance, neat uniform, information and others is the factor of service quality satisfaction. Secondly, reliability structured with service practice, problem solving, and service in accurate time is the factor of service quality satisfaction. Thirdly, assurance structured with the reliability of employees, sufficient knowledge of employees, courteous and good manner is the factor of service quality satisfaction. Fourthly, responsiveness structured with prompt service, voluntary help, customer response service and the like is the factor of service quality satisfaction. Fifthly, the sympathy structured in interest for each customer, provision of service in time convenient to use, encountering the customers with genuine feeling are the factors of service quality satisfaction. And sixthly, the service satisfaction factors would influence on the consumer behavior factors.
방사능(선)에 관한 차세대 인식도 및 교육방향에 대한 고찰
서동우,김경연,김종은,배현학,손재호,전민규,정재은,Seo, Dong-Woo,Kim, Kyeong-Yeon,Kim, Jong-Eun,Bae, Hyun-Hak,Son, Jae-Ho,Jeon, Min-Gyu,Jung, Jae-Eun 대한디지털의료영상학회 2014 대한디지털의료영상학회논문지 Vol.16 No.1
Sens of insecutity of the public and professionals about harmful effects of radiation is increasing in an accident at the Chernobyl and Fkushima nuclear power plant.Anxiety was amplified to lack of information about radiation majority of people. To target the middle and high school in the region of Daegu and Gyeongsangbuk-do, to investigate the radiation recognition of the next generation, it is intended to present a model of education for the safe use of radiation. The High School of the six metropolitan cities, city, town through the questionnaire and needs to be educational experience of radiation and use knowledge level of radiation, experience in daily life, understanding of man-made radiation and natural radiation, information channel on radiation, the radiation Distribute the total 800 parts of, to recover the 629 unit, was analyzed for 155 females 474 males. Many people 75.36% of the people, to 24.64% female subjects of this investigation, was constant, respectively from 13 to 18 years age. It is a large number and 30.37% of the respondents as "normal" level of knowledge of radiation, for the type of radiation, most knew. You have answer for risk experience of the medical radiation was higher, touching a lot of information via the broadcast medium in general, and the accuracy is low. I thought we wanted to be educated three or more twice a year, as an educator,about 71.37% and radiation-related understanding of knowledge and background in accordance with the diversification of information channels, the regional differences between urban and rural areas. But I considered the difference age (grade) for each is displayed, intended for junior high school students, the target surface and use the occurrence of radiation, high school students, the need for education about risk and application of radiation through this study.
프리텐션 현장 긴장 방식 적용 PSC U형 거더 제작 및 성능 검증
서동우 ( Seo Dong-woo ),박상기 ( Park Sangki ),박기태 ( Park Ki-tae ),장현옥 ( Jang Hyun-ock ),신연우 ( Shin Yeon-woo ) 한국구조물진단유지관리공학회 2023 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.27 No.1
국내에서는 I형 거더의 길이를 증대시키기 위해 U형 프리스트레스 거더 개발이 시도되었다. 다만, 포스트텐션법에 의한 자중이 크기 때문에 길이 30m 이하가 일반적이다. 본 연구에서는 단면적 감소로 인한 자중 및 사용재료의 감소를 유도하기 위해 포스트텐션 방식에 제한을 두지 않고 프리텐션 방식을 적용하였다. 또한 저자는 U형 거더의 내부 반력대를 이용한 현장 프리텐션 방법의 적용을 제안하였다. 프리스트레스트 콘크리트 U형 거더교는 콘크리트 슬래브와 합성단면으로 구성된다. PSC I형 거더에 비해 저항성, 강성 등의 구조적 성능이 향상되었다. 또한 제작 및 설치 단계에서 시공 안전성이 향상되고 거더 중량을 감소시켜, 교량의 미관과 경제성을 확보하였다. 이에 따라 고품질의 공장제작 및 현장타설 부재로 효율적인 시공이 가능할 것으로 기대된다. 본 연구에서는 프리텐션 방식을 도입하여 실대형(L=40m) 성능 검증을 수행하였다.
슈퍼컴퓨팅 기반의 공학해석 서비스 제공을 위한 멀티 뷰 지원 VR/AR 가시화 시스템 개발
서동우(Dong Woo Seo),이재열(Jae Yeol Lee),이상민(Sang Min Lee),김재성(Jae Seong Kim),박형욱(Hyung Wook Park) (사)한국CDE학회 2013 한국CDE학회 논문집 Vol.18 No.6
The requirement for high performance visualization of engineering analysis of digital products is increasing since the size of the current analysis problems is more and more complex, which needs high-performance codes as well as high performance computing systems. On the other hand, different companies or customers do not have all the facilities or have difficulties in accessing those computing resources. In this paper, we present a multi-view supporting VR/AR system for providing supercomputing-based engineering analysis services. The proposed system is designed to provide different views supporting VR/AR visualization services depending on the requirement of the customers. It provides a sophisticated VR rendering directly dependent on a supercomputing resource as well as a remotely accessible AR visualization. By providing multi-view centric analysis services, the proposed system can be more easily applied to various customers requiring different levels of high performance computing resources. We will show the scalability and vision of the proposed approach by demonstrating illustrative examples with different levels of complexity.
도로시설물 적용 앵커볼트 결함 검출을 위한 비파괴(Ultrasonic) 검사기법 적용에 대한 연구
서동우(Dong-Woo Seo),김재환(Jaehwan Kim),이진혁(Jin-Hyuk Lee),조한민(Han-Min Cho),박상기(Sangki Park),김민수(Min-Soo Kim) 한국방재안전학회 2022 한국방재안전학회 논문집 Vol.15 No.4
국내의 앵커볼트 일반 비파괴 검사법은 육안검사와 타음검사를 적용하고 있으나, 육안검사는 기초에 포함된 부분이나 너트 및 베이스플레이트가 설치된 부분에서 앵커볼트의 부식이나 피로균열 등을 확인하는 것이 어렵다. 타음검사는 주변 환경과 개인차에 의한 영향을 받기 때문에 객관적인 조사가 어려운 것이 현실이므로 이러한 결함을 정량적으로 추정할 수 있는 비파괴 검사 기술개발이 필요하다. 국내 도로시설물 앵커볼트의 점검은 육안조사를 수행하고 있으며, 교량받침, 낙교방지시설 등의 앵커볼트 중요도가 높으므로 기존 점검방법과 함께 비파괴검사 기술을 개발하여 앵커볼트의 예방정비를 통해 교량 수명연장에 기여할 필요가 있다. 본 기술 개발을 통해 현재 수행하고 있지 않은 앵커볼트의 비파괴검사를 수행함으로 도로시설물 앵커볼트의 선제적/능동적 유지관리가 가능한 기술로 연구개발 및 실용화가 시급하다. 본 논문에서는 비파괴 검사 기법 중 초음파탐상법(Ultrasonic test)을 적용하여 부식, 균열 등 앵커볼트의 결함 검출 가능성 및 실뢰도를 실험적으로 검증하였다. 기술 개발이 완성되면 검사 신뢰성 향상 원천기술 확보로 앵커볼트에 대한 선제적/능동적 유지관리의 실현이 가능할 것으로 기대된다. The general non-destructive inspection method for anchor bolts in Korea applies visual inspection and hammering inspection, but it is difficult to check corrosion or fatigue cracks of anchor bolts in the part included in the foundation or in the part where the nut and base plate are installed. In reality, objective investigation is difficult because inspection is affected by the surrounding environment and individual differences, so it is necessary to develop non-destructive inspection technology that can quantitatively estimate these defects. Inspection of the anchor bolts of domestic road facilities is carried out by visual inspection, and since the importance of anchor bolts such as bridge bearings and fall prevention facilities is high, the life span of bridges is extended through preventive maintenance by developing non-destructive testing technology along with existing inspection methods. Through the development of this technology, non-destructive testing of anchor bolts is performed and as a technology capable of preemptive/active maintenance of anchor bolts for road facilities, practical use is urgently needed. In this paper, the possibility of detecting defects in anchor bolts such as corrosion and cracks and reliability were experimentally verified by applying the ultrasonic test among non-destructive inspection techniques. When the technology development is completed, it is expected that it will be possible to realize preemptive/active maintenance of anchor bolts by securing source technology for improving inspection reliability.
특수교 케이블 손상을 반영한 가속도 데이터 기반 계측 장력의 안전관리 기법 개발
서동우 ( Seo Dong-woo ),김병철 ( Kim Byeong-cheol ),나원기 ( Na Wongi ),김유희 ( Kim Yuhee ),박기태 ( Park Ki-tae ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
Currently, the cable safety management of cable supported bridges is calculated by the ratio of the measured tension to the design tension. The measurement of the tension is performed by indirectly estimating the acceleration measured at the cable surface in terms of the tension. The method of converting the cable vibration response (acceleration) into the tension is disadvantageous in that the damage of the individual strand (or wire) in the cable is not clearly reflected in the tension because the measurement is not reliable and is managed only by the total tension. The purpose of this study is to improve the cable safety management system by evaluating how the damage of individual strand of MS type cable, which is mainly applied to cable-stayed bridges, affects the safety level managed by level of cable tension.