XOnto-Apriori: 확장된 온톨로지 추론 기반의 연관 규칙 마이닝 알고리즘

이종현,김장원,정동원,이석훈,백두권,Lee, Chong-Hyeon,Kim, Jang-Won,Jeong, Dong-Won,Lee, Suk-Hoon,Baik, Doo-Kwon 한국정보처리학회 2011 정보처리학회논문지D Vol.18 No.6

In this paper, we introduce XOnto-Apriori algorithm which is an extension of the Onto-Apriori algorithm. The extended algorithm is designed to improve the conventional algorithm's problem of comparing only identifiers of transaction items by reasoning transaction properties of the items which belong in the same category. We show how the mining algorithm works with a smartphone application recommender system based on our extended algorithm to clearly describe the procedures providing personalized recommendations. Further, our simulation results validate our analysis on the algorithm overhead, precision, and recall. 이 논문에서는 연관 규칙 마이닝 알고리즘의 정확도를 향상시키기 위하여 기존 Onto-Apriori 알고리즘을 확장한 XOnto-Apriori 알고리즘을 제안한다. 기존 알고리즘은 트랜잭션 항목의 식별자만을 비교하여 지지도를 계산하기 때문에 유사한 속성을 가진 항목들간의 관계를 분석하지 못하는 문제점을 지닌다. 이러한 문제점을 해결하기 위해 제안 알고리즘은 온톨로지 추론 기반의 속성 비교를 통해 같은 식별자를 지니지 않는 항목들간의 관계성도 지지도 계산에 반영할 수 있도록 한다. 제안 알고리즘의 규칙 생성 과정을 명확히 서술하기 위해 스마트폰 어플리케이션 추천 시스템을 설계하였으며 이 시스템은 기존 알고리즘 기반의 시스템에 비해 보다 나은 속도와 정확도를 보였다.

선진 재난안전의식의 활성화를 위한 방안 연구

이종현,김미라,고재철,Lee, Jong-hyun,Kim, Mi-ra,Ko, Jae-chul 한국재난정보학회 2021 한국재난정보학회 논문집 Vol.17 No.3

연구목적: 본 연구에서는 대형재난사고의 주요한 요인으로 지적되는 국민들의 재난안전의식을 활성화 시킬 수 있는 방안을 제시하고자 한다. 연구방법:본 연구에서는 재난관리 및 안전의식에 관한 이론적인 검토를 실시하고, 재난사고의 원인을 도출하기 위해 '재난관리평가 국민안전 체감도의식' 조사 결과 및 대형재난사고 사례들을 분석하여 선진 재난안전의식 활성화 방안을 제시하였다. 연구결과: 재난관리평가 국민안전 체감도 조사를 통해 재난관리 4단계 중 '대응'차원은 잘 수행되고 있으나, '복구'차원이 미흡한 국민들은 인식하고 있었고, 특히 '예방' 차원에서 재난안전에 대한 교육이 매우 부족하다고 느끼고 있었다. 국민 안전의식 조사를 통해서는 대피시설에 대한 인지 수준이 매우 낮았고, 감염병과 붕괴사고에 대한 정보가 부족한 것으로 나타났으며, 특히 일상생활에서의 안전수칙 준수에 대한 인식이 미흡한 것으로 드러났다. 대형재난사고(코로나19, 밀양세종병원 화재, 2004년 동해안 산불)에 대한 사례를 분석한 결과, 안전불감증과 같은 안전의식의 결여가 피해규모의 확대를 유발시킨 주요한 원인임을 도출하였다. 결론:재난사고를 예방·감소시킬 수 있는 가장 근본적인 요소는 선진 재난안전의식의 활성화이며, 이를 제고하기 위한 세 가지 방안을 제시하였다. 먼저, 안전교육 및 안전홍보 활동의 확대를 통한 안전문화운동의 확산이 필요하다. 두 번째로는 재난대응에 대한 실효성을 향상시키기 위해 일반인들을 대상으로 하는 재난대비훈련을 시행해야 한다. 마지막으로 안전에 대한 개개인의 인식 전환이 필요하다. 이러한 요소들이 체계적으로 이루어져야만 선진 재난안전의식이 제고될 수 있을 것이며, 궁극적으로 우리 사회의 재난사고들이 감소될 수 있을 것이다. Purpose: The purpose of this study is to create the deveopment plan for promotion of advanced disaster-safety awareness, which is noted as a major factor in the large disaster. Method: This study is to conduct theoretical review with regard to disaster management and safety awareness. Consciousness surveys on safety awareness and previous disaster case was analyzed to derive the cause of the disaster, and the development plan for promotion of advanced disaster-safety awareness was suggested. Result: In the survey on the public's sense of safety on the disaster management evaluation, 'Response' stage was well performed, but the 'Recovery' stage was not. Especially, it was found that disaster safety education at the 'Prevention' stage was very lacking. In the survey on the public's safety awareness, the awareness level of the evacuation facility was very low, information on infectious diseases and collapse accident was insufficient. Especially, it has been found that the awareness on safety regulation in daily life is very insufficient. Through the case study on previous disaster(COVID-19, Fire in Miryang Sejong Hospital, Forest fire in the east coas at 2004'), it was derived that the lack of safety awareness(such as safety insensitivity) was the main factor of the expansion of the damage scale. Conclusion: The development plan for promotion of advanced disaster-safety awareness are as follow. First, it is necessary to spread the safety culture movement through the expansion of safety education and safety promotion. Second, disaster confrontation training for the public should be implemented to improve the effectiveness of disaster response. Finally, it is necessary to change the individual awareness on safety. When these factors are implemented systematically, advanced disaster-safety awareness can be promoted. Ultimately, disaster accidents in our society can be reduced.

RFID 태그 제조공정과 저가격 방안

이종현,Lee, Jong-Hyeon (사)한국포장협회 2008 包裝界 Vol.182 No.-

광노광을 위한 투영광학계의 기술분석

이종현,배남진,전치훈,장원익,이용일,김윤태,김상호,김보우,Lee, Jong-Hyeon,Bae, Nam-Jin,Jeon, Chi-Hun,Chang, Won-Ik,Lee, Yong-Il,Kim, Yun-Tae,Kim, Sang-Ho,Kim, Bo-Woo 한국전자통신연구원 1990 전자통신동향분석 Vol.5 No.2

차세대 구조용 강재

이종현,Lee, Jong-Hyeon 기술표준원 2006 기술표준 Vol.49 No.-

미용전공 여대생과 비전공 여대생의 체형인식, 신체만족도 및 식습관 비교 연구

이종현,김민선,오주환,Lee, Jong-Hyun,Kim, Min-Sun,O, Ju-Hwan 동아시아식생활학회 2007 동아시아식생활학회지 Vol.17 No.4

This study was carried out to investigate perceptions of body image, body satisfaction, and dietary habits of beauty art major and non-major college students in Gyeonggi province. A total of 312 self-administered questionnaires (beauty art majors=145; non-majors=167) were analyzed. The means for height, weight, and BMI were 161.7 cm, 51.4 kg and 19.7, respectively. There were more majors who were underweight according to BMI classification than non-majors. Sixty-six percent of the subjects had previous weight control experience, and there was no significant difference between the majors and non-majors. The mean score for current body image was 4.61 out of a possible 9 points in the majors, which was significantly lower than 4.95 in the non-majors, and their perception of an ideal body image was thinner than their current body image. Those with more weight control experience had currently heavier perceptions of their body. The mean score for body satisfaction was 2.60 out of a possible 5 points, which was lower than the mean score for their attitudes toward the importance of their bodies. The mean score for dietary habits was 2.80 out of a possible 5 points, and there was no significant difference with dietary habits according to weight control experience or BMI classification. In both the majors and non-majors, there was a significant positive correlation between BMI and perception of current body image (p<0.001, p<0.001), and a negative correlation between BMI and body satisfaction (p<0.01, p<0.001). In the major students, there were significant positive correlations between dietary habits and body satisfaction (p<0.01), and attitudes toward the body importance (p<0.05); therefore, the greater their body satisfaction and body importance, the higher their scores for dietary habits.

C- 및 Fe-(Beewax.Polyethylene) 정특성 감온소자

이종현,손병기,이종덕,Lee, Jong-Hyeon,Son, Byeong-Gi,Lee, Jong-Deok 대한전자공학회 1976 전자공학회지 Vol.13 No.4

beewax와 polyethylene을 혼합한 모체에 탄색 및 연분말을 징량첨가시켜서 정특성감온소자를 제조하였다. C.(beewax·Polyethylene)시편은 온도범위 20°∼90℃에서 104-1010Ωcm의 PTC특성을 나타내었으며 제조과정상에 분말혼합 및 가압냉각방법를 도입함으로써 그 재현성과 안정성을 현저히 개선시킬 수 있었다. 또한 Fe-(betwax· polyethylene)시편은 같은 온도범위에서 102-1010Ωcm의 PTC특성을 나타내었으며 저저항범위에서 PTC효과를 얻을 수 있었다. The carbon (the iron) -beewax·polyethylene thermistors have been prepared by heating the well ground mixture of carbon (iron), beewax and polyethylene at 160℃ for one hour and by cooling it under pressure of 12kgw/cm2. The resistivity for the former (the latter) increased from 102Ω·cm (104Ω·cw) to 1010Ω·cm(1010Ω·cm) as temperature changed from 20℃ to 90℃. The resistivity, 102Ω·cm at room temperature for the former, was lower by order Q( two than that for the papostor made by the earlier reporter. The reproducibility, which has been an important Problem for this type of thermistors to be industrialized, was improved by introducing pressure in cooling procedure for both carbon and iron thermistors. The carbon (the iron) -beewax.polyethylene thermistors have been prepared by heating the well ground mixture of carbon (iron), beewax and polyethylene at 16$0^{\circ}C$ for one hour and by cooling it under pressure of 12kgw/cm2. The resistivity for the former (the latter) increased from 102$\Omega$.cm (104$\Omega$.cw) to 1010$\Omega$.cm(1010$\Omega$.cm) as temperature changed from 2$0^{\circ}C$ to 9$0^{\circ}C$. The resistivity, 102$\Omega$.cm at room temperature for the former, was lower by order Q( two than that for the papostor made by the earlier reporter. The reproducibility, which has been an important Problem for this type of thermistors to be industrialized, was improved by introducing pressure in cooling procedure for both carbon and iron thermistors.

운행 중인 2-Arch 터널의 피난연결통로 신설을 위한 중앙벽체 굴착에 관한 연구

이종현,Lee, Jong-Hyun 한국재난정보학회 2021 한국재난정보학회 논문집 Vol.17 No.3

연구목적: 기시공되어 현재 운행 중인 2-Arch 터널에 대하여 피난연결통로 신설의 필요성이 대두되고 있다. 이에 본 연구는 중앙벽체 굴착에 따른 터널 및 벽체 거동 분석과 안정성 분석에 목적을 두고 있다. 연구방법: 2-Arch 터널과 피난연결통로의 이론적 배경을 설명하고, 3차원의 유한요소 수치해석을 통하여 터널 및 벽체의 거동을 집중적으로 분석하였다. 다양한 지반 조건을 변수로 하여 암반 등급에 따른 매개변수 해석을 수행하였으며, 중앙벽체의 변위와 응력을 집중적으로 분석하였다. 연구결과: 중앙벽체 굴착 시 개구부 중앙에서 가장 큰 침하량을 보였으며, 응력은 첫 번째 굴착 시 가장 크게 발생하였다. 또한 개구부 양 상단에서 응력집중 현상이 발생함을 알 수 있었으며, 허용응력 개념을 고려한 안정성 검토 결과 허용응력을 초과하는 것으로 나타났다. 결론: 터널의 천단변위는 허용기준치 내로 안정성을 확보하였지만, 발생응력은 허용기준치를 초과하는 것으로 나타나 시공 시 적절한 보강공법을 적용하여 갑작스런 응력 해방에 대한 방지가 필요할 것으로 사료된다. Purpose: There is a need to construct an evacuation passageway for the 2-Arch tunnel, which has been constructed and is in operation. Therefore, it aims to analyze tunnel and center wall behaviour and stability due to excavation of the center wall. Method: We describe the theoretical background of 2-Arch tunnel and evacuation passageway, and focused on analyzing the behaviour of tunnel and wall using 3-dimensional finite element analysis. Parametric analysis according to rock rating was performed with various ground conditions, and the displacement and stress of the center wall were intensively analyzed. Result: With the center wall excavation, the largest amount of settlement was shown in the center of the opening, and the stress was greatest during the first excavation. In addition, it was shown that stress concentration occurred at the top of both openings, and stability reviews considering the concept of allowable stress showed that it exceeded the allowable stress. Conclusion: Although the displacement of the tunnel has secured stability within the allowable standard, the generated stress is found to exceed the allowable standard, so it is necessary to prevent sudden stress release by applying appropriate reinforcement methods during construction.

집속 이온빔 (FIB) 기술 및 응용

이종현,배남진,강봉구,박성호,Lee, Jong-Hyeon,Bae, Nam-Jin,Gang, Bong-Gu,Park, Seong-Ho 한국전자통신연구원 1987 전자통신동향분석 Vol.2 No.3

솔더 나노입자를 사용한 TSV Interconnection 기술

이종현,윤종호,현창용,Lee, Jong-Hyun,Yoon, Jong-Ho,Hyun, Chang-Yong 대한용접접합학회 2011 대한용접·접합학회지 Vol.29 No.3