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      • KCI등재

        Challenge for Diagnostic Assessment of Deep Learning Algorithm for Metastases Classification in Sentinel Lymph Nodes on Frozen Tissue Section Digital Slides in Women with Breast Cancer

        김영곤,송인혜,이현나,김성철,양동현,김남국,신동호,유연수,이교운,김다혜,정휘진,조현빈,이현규,김태우,최종현,서창원,한성일,이영제,이영서,유형련,이용주,박정환,오소희,공경엽 대한암학회 2020 Cancer Research and Treatment Vol.52 No.4

        Purpose Assessing the status of metastasis in sentinel lymph nodes (SLNs) by pathologists is an essential task for the accurate staging of breast cancer. However, histopathological evaluation of SLNs by a pathologist is not easy and is a tedious and time-consuming task. The purpose of this study is to review a challenge competition (HeLP 2018) to develop automated solutions for the classification of metastases in hematoxylin and eosin–stained frozen tissue sections of SLNs in breast cancer patients. Materials and Methods A total of 297 digital slides were obtained from frozen SLN sections, which include post–neoadjuvant cases (n=144, 48.5%) in Asan Medical Center, South Korea. The slides were divided into training, development, and validation sets. All of the imaging datasets have been manually segmented by expert pathologists. A total of 10 participants were allowed to use the Kakao challenge platform for 6 weeks with two P40 GPUs. The algorithms were assessed in terms of the area under receiver operating characteristic curve (AUC). Results The top three teams showed 0.986, 0.985, and 0.945 AUCs for the development set and 0.805, 0.776, and 0.765 AUCs for the validation set. Micrometastatic tumors, neoadjuvant systemic therapy, invasive lobular carcinoma, and histologic grade 3 were associated with lower diagnostic accuracy. Conclusion In a challenge competition, accurate deep learning algorithms have been developed, which can be helpful in making frozen diagnosis of intraoperative SLN biopsy. Whether this approach has clinical utility will require evaluation in a clinical setting.

      • KCI등재

        성공적인 IT 아웃소싱을 위한 계약 당사자간 책임 요소에 대한 실증 연구

        김영곤 한국정보관리학회 2007 정보관리학회지 Vol.24 No.3

        IT 아웃소싱은 전략적 차원에서 추진되는 조직의 중요 사안이나 이를 추진함에 있어 명확한 목표와 분명한 계약이 없이 단순한 생각으로 접근했을 경우는 그 결과에 대해 주관적인 실패로 인식하기 쉽다. 특히 아웃소싱 관리에서는 공급자와 고객 간의 계약 특히 심리적 계약에 근거한 관계 관리가 매우 중요하다고 인식되며, 본 연구는 아웃소싱 관계 수준과 아웃소싱 성과에 영향을 미치는 아웃소싱 공급자와 수혜자인 고객의 책무 사항에 초점을 두고 이루어졌다. IT 아웃소싱에 대한 공급자의 책임영역은 아웃소싱 수행 기반적 요소 및 수행 능력과 관련된 요소로 대별할 수 있으며, 고객의 책임영역은 아웃소싱 수용 환경적 요소 및 수용 능력과 관련된 요소로 대별할 수 있다. 본 연구의 결과로는 수행기반, 수행능력, 수용능력이 아웃소싱 관계수준에 영향을 미치고, 아웃소싱 관계수준은 아웃소싱 성과에 영향을 미치는 것으로 나타났다. 그리고 공급자의 수행능력은 아웃소싱 성과에 직접적인 영향을 미치기도 한다. 그리고 공급자와 고객의 4가지 책임영역은 상호간에도 유의적 관계가 있다. IT outsourcing has become a critical component of organizations, but improper expectations, ambiguous contracts and unclear goals frequently cause the failure of IT outsourcing. Especially we have to be concerned about the uncareful management of customer-supplier relationships based on a psychological contract perspective. This study focuses on the obligations of contractual parties for IT outsourcing which influence the outsourcing relationship(OR) and the successful performance of IT outsourcing(OP). The supplier obligations consist of the achievable infrastructure(S1) and capability(S2), and the customer obligations is composed of the acceptable environment(C1) and acceptability(C2) for IT outsourcing. This paper shows that the S1, S2, and C2 have an effect on the OR, the OR on the OP, and the S2 also on the OP directly. The four components of customer-supplier obligations are mutually related to each other. What is more, we must notice that the S2 has strong connections with the C2.

      • KCI등재
      • KCI등재

        스퍼터링 Mo 도핑 탄소박막의 특성과 유기박막트랜지스터의 게이트 전극으로 응용

        김영곤,박용섭,Kim, Young Gon,Park, Yong Seob 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.1

        Mo doped carbon (C:Mo) thin films were fabricated with various Mo target power densities by unbalanced magnetron sputtering (UBM). The effects of target power density on the surface, structural, and electrical properties of C:Mo films were investigated. UBM sputtered C:Mo thin films exhibited smooth and uniform surfaces. However, the rms surface roughness of C:Mo films were increased with the increase of target power density. Also, the resistivity value of C:Mo film as electrical properties was decreased with the increase of target power density. From the performance of organic thin filml transistor using conductive C:Mo gate electrode, the carrier mobility, threshold voltage, and on/off ratio of drain current (Ion/Ioff) showed $0.16cm^2/V{\cdot}s$, -6.0 V, and $7.7{\times}10^4$, respectively.

      • KCI등재

        DLC 박막이 코팅된 폴리머 애자의 표면 및 물리적 특성

        김영곤,박용섭,Kim, Young Gon,Park, Yong Seob 한국전기전자재료학회 2021 전기전자재료학회논문지 Vol.34 No.1

        In this study, we tried finding new materials to improve the stain resistance properties of polymer insulating materials. Using the filtered vacuum arc source (FVAS) with a graphite target source, DLC thin films were deposited on silicon and polymer insulator substrates depending on their thickness to confirm the surface properties, physical properties, and structural properties of the thin films. Subsequently, the possibility of using a DLC thin film as a protective coating material for polymer insulators was confirmed. DLC thin films manufactured in accordance with the thickness of various thin films exhibited a very smooth and uniform surface. As the thin film thickness increased, the surface roughness value decreased and the contact angle value increased. In addition, the elastic modulus and hardness of the DLC thin film slightly increased, and the maximum values of elastic modulus and hardness were 214.5 GPa and 19.8 GPa, respectively. In addition, the DLC thin film showed a very low leakage current value, thereby exhibiting electrical insulation properties.

      • KCI등재후보
      • 비정규교수의 교원지위 회복과 대학교육 정상화

        김영곤 민주화운동기념사업회 2009 기억과 전망 Vol.0 No.20

        135,000 irregular professors containing 70,000 part-time lecturers who undertake half of all university lectures but they are absent of the status of teacher. The part-time lecturers who critical to the dictatorship had been deprived the status of teacher in 1977 under the Dictator Park Junghee by revision of the Law of Education and have no status of teacher and no rights to participate in university adminstration until now. The non-tenure track also have no status of teacher. The character of labor for irregular professors on the Labor Standard Act had been recognized by the Supreme Court ruling in 2007, so almost of the parttime lectures have not contracted with university, not been admitted the 4 insurance and not offered the study room and the research expense. The average irregular professors lecture 4.2 hours in a week and the annual total lecture fee is 4,875,000 won. The latter are 1/5-1/10 of the regular professor’s. This bad condition lowered the standard of research, teaching and education, and has violated the student’s rights of learning and parent’s rights of education. So the independent teaching is impossible. The dialogue, question & answer, criticism disappeared in school room, and only existed the lopsided teaching and the cramming system of education. This system make Korean society who shift to a post-ndustrialization era worry about their future. The irregular professors had organized the union in 1988 and had made efforts to get back the status of teacher but not achieved. They constructed a small tent in front of the Korea National Assembly and sitting strike over 600days until now. And the college students are picketing over 1 year in front of the Ministry of Eduction, Technology & Engineering and the office of a member of National Assembly. Members of the National Assembly of 3 ruling and opposite parties proposed 3 bills to revise the Law of Higher Education to get back the status of teacher for irregular professors in 17th session. But that were wasted by the counteraction of universities and unwelcoming of the Ministry of Education. Member Lee Sangmin proposed bill again in 18th session but have a not good prospect. The power and will of the irregular professor to solve this problem are weak and most of regular professors are against this. So the irregular professors have to liberate the self censorship and cooperate to revise the Law of Higher Eduction with the student who want to recover the rights of learn, parents who want to keep the rights of education, and society who prepare the post-industrialization era.

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