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이재설,박태형,Lee, Jae-Seol,Park, Tae-Hyoung 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.10
The inspection machine in SMT (Surface Mount Technology) line detects the assembly defects such as missing, misalignment, loosing, or tombstone. We propose a new method to classify the defect types of chip components by processing the image of PCB. Two original images are obtained from horizontal lighting and vertical lighting. The image of the component is divided into two soldering regions and one packaging region. The features are extracted by appling the PCA (Principle Component Analysis) to each region. The MLP (Multilayer Perceptron) and SVM (Support Vector Machine) are then used to classify the defect types by learning. The experimental results are presented to show the usefulness of the proposed method.
이재설(Jae-Seol Lee),박태형(Tae-Hyoung Park) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.18 No.12
The inspection machine in SMT (Surface Mount Technology) line detects the assembly defects such as missing, misalignment, loosing, or tombstone. We propose a new method to classify the defect types of chip components by processing the image of PCB. Two original images are obtained from horizontal lighting and vertical lighting. The image of the component is divided into two soldering regions and one packaging region. The features are extracted by appling the PCA (Principle Component Analysis) to each region. The MLP (Multilayer Perceptron) and SVM (Support Vector Machine) are then used to classify the defect types by learning. The experimental results are presented to show the usefulness of the proposed method.
DEA-Window 분석 및 Malmquist 생산성지수를 사용한 우편집중국 효율성 및 생산성 변화 분석
이재설(Jae Seol Lee),고현우(Hyun-Woo Goh) 한국산업경영시스템학회 2009 한국산업경영시스템학회지 Vol.32 No.4
The purpose if this paper is to analyze the 24 mail center's efficiency and productivity changes from first quarter to fourth quarter of 2008 using window analysis and Malmquist productivity index Row views of window analysis results make it possible to determine trends and/or observed behavior with the same data set, and column views to examine the stability of results across different data sets malmquist productivity indexes greater than unity translate into improvements in productivity, and less than unity mean deterioration in performance over time The results of this study suggest that DEA models under dynamic situations such as window analysis and Malmquist productivity index enable us to comprehend the efficiency and productivity changes over time and to show the direction of improvements
어라운드 뷰 모니터링 시스템에서 주차 가능 영역 탐색방법
이재설(Jae-Seol Lee),기석철(Seok-Cheol Kee) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.6
To develop an autonomous valet parking system, the empty parking space detection method should guide the vehicle’s direction. In this paper, we propose an empty parking space detection method based on the around-view monitoring system. The proposed method can detect available parking spaces by creating a map of parking line features. First, we create a map of parking line features using line filters and detect parking line candidates using the Hough transform on the feature map. Since there exist valid and invalid lines among the parking line candidates, we analyze the lines’ density and connectivity to select valid lines. Several valid lines can be represented as a one-line model created by clustering. Using the features of the parking area (width and height of the parking space) among the line models can remove useless lines and extract the sideline of the parking space. A feature map of the parking lines is used to ensure the robustness of the sideline model. Finally, we can detect the parking space using sideline models. The proposed method was evaluated with 634 images logged in a real parking lot.
인체 섬유아세포 및 케라티노사이트에 대한 지방줄기세포 분비물의 세포생물학적 기능
이재설 ( Jae Seol Lee ),이종환 ( Jong Hwan Lee ) 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 2012 한국미생물·생명공학회지 Vol.40 No.2
피부재생에 대한 지방줄기세포 배양상등액(ADSC-CM)의 효능에 대한 연구를 진행하였다. ADSC-CM이 피부재생에 기여하는 기작은 명확하지 못하지만, ADSC-CM은 다양한 분비물을 포함하고 있고 따라서 피부트러블 처리를 위한 훌륭한 재료이다. 저 산소 상태에서 생산된 ADSC-CM, 즉 advanced adipose-derived stem cell protein extract (AAPE)는 피부재생에 보다 좋은 재료이다. 본 연구는 피부 재생에 결정적 역할을 하는 인체 primary 세포인 섬유아 세포(HDF)와 케라티노사이트(HK)를 이용하여 AAPE의 효능을 검증하였다. 0.32 μg/ml AAPE에서 콜라겐 합성이 관찰 되었으며 AAPE는 stress fiber 형성을 강화하였다. DNA microarray 결과에서는 세포증식, 세포이동, 세포부착, 상처반응에 관여하는 133개의 유전자 발현이 조절되는 것을 알았다. Antibody array를 통해 CD54, FGF-2, GM-CSF,IL-4, IL-6, VEGF, TGF-β2, TGF-β3, MMP-1, MMP-10, 그리고 MMP-19와 같은 MMP, 성장인자, 사이토카인등25개의 알려진 단백질이 포함되어 있다는 것을 알았다. 따라서, AAPE는 HK의 세포생물학적 기능을 활성화 할 수있다고 사료되며 HDF에서는 콜라겐 합성을 유도하였다. 이러한 결과는 AAPE가 피부재생에 임상적 적용이 가능하 리라는 것을 의미한다. The beneficial effects of adipose-derived stem cell conditioned media (ADSC-CM) for skin regeneration have previously been reported, despite the precise mechanism of how ADSC-CM promotes skin regeneration remaining unclear. ADSC-CM contains various secretomes and this may be a factor in it being a good resource for the treatment of skin conditions. It is also known that ADSC-CM produced in hypoxia conditions, in other words Advanced Adipose-Derived Stem cell Protein Extract (AAPE), has excellent skin regenerative properties. In this study, a human primary skin cell was devised to examine how AAPE affects human dermal fibroblast (HDF) and human keratinocyte (HK), which both play fundamental roles in skin regeneration. The promotion of collagen formation by HDFs was observed at 0.32 mg/ml of AAPE. AAPE treatment significantly stimulated stress fiber formation. DNA gene chips demonstrated that AAPE in HKs (p<0.05) affected the expression of 133 identifiable transcripts, which were associated with cell proliferation, migration, cell adhesion, and response to wounding. Twenty five identified proteins, including MMP, growth factor and cytokines such as CD54, FGF-2, GM-CSF, IL-4, IL-6, VEGF, TGF-β2, TGF-β3, MMP-1, MMP-10, and MMP-19, were contained in AAPE via antibody arrays. Thus, AAPE might activate the HK biological function and induce the collagen synthesis of HDF. These results demonstrate that AAPE has the potential to be used for clinic applications aimed at skin regeneration.