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박종욱(Jongwook Park),박경택(Kyongtek Park),박성주(Sungju Park) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.2Ⅱ
순차회로에서 테스트패턴 생성을 용이하게 하기 위하여 완전스캔 및 부분스캔 기술이 널리 이용되고 있다. 스캔설계로 인한 추가영역 및 속도지연을 최소화하고 최대의 고장 점검도를 목표로 하는 부분스캔 기술은 그래프 모델링[1], 테스트 가능도[2], 상위 수준에서의 구조분석[3,4] 등으로 구분할 수 있다. 본 연구에서는 구조분석에 의한 부분시캔과 테스트 가능도를 이용한 부분스캔 기술을 소개하고 각각의 기술에 의한 실험결과를 비교 · 분석한다. 어떤 순차회로에서는 구조분석에 의한 방법의 점검도가 높고 또 다른 회로에서는 테스트 가능도에 의한 스캔설계가 높은 점검도를 나타냄을 관측하였다. 이러한 두 가지 기술의 장단점을 분석하여 통합함으로써 최상의 고장점검도를 이룰 수 있는 새로운 방법을 제안한다.
박종욱(Jongwook Park),박경택(Kyongtek Park),조상욱(Sangwook Cho),박성주(Sungju Park) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.2Ⅱ
일반적인 메모리테스트에 있어서 고장점검을 위한 테스트패턴의 생성방법으로는 각각의 고장모델에 대한 테스트패턴을 Deterministic하게 생성해주는 방법과 테스트패턴 생성기로서 Pseudo Random Pattern Generator(PRPG)를 이용하여 생성하는 방법 두 가지의 경우로 구분할 수 있다. 본 연구에서는 PRPG를 사용하여 여러 가지 메모리의 결함을 대표한다고 볼 수 있는 Static 및 Dynamic Neighborhood Pattern Sensitive Fault(NPSF) 등 다양한 종류의 고장을 점검할 수 있도록 메모리 BIST를 상위수준 언어인 VHDL로 설계하고 합성하였다. 메모리 BIST를 위한 번지생성기로는 5셀 Tiling방법과 점진적 방법을 사용하여 각각 구현하고 이를 시뮬레이션 하여 기존의 Linear Feedback Shift Register(LFSR)보다 본 연구에서 패턴생성기로 사용한 LFSR의 메모리고장 점검도가 향상되었음을 보였다. 마지막으로 두 가지 번지생성 방법의 합성결과를 비교분석하여 메모리 크기에 따라 예상되는 메모리 BIST의 추가영역을 제시하였다.
New dyes based on anthraquinone derivatives for color filter colorants.
Park, Suyeoun,Park, Junghyo,Lee, Sola,Park, Jongwook American Scientific Publishers 2014 Journal of nanoscience and nanotechnology Vol.14 No.8
<P>Two new compounds which substituted quinoline group in 1,4-position and 1,8-position of anthraquinone were synthesized for color filter. The change in physical properties according to the substituted position of the synthesized compound was systematically identified from the perspectives of optical property and thermal property. The extinction coefficient (ε) of the synthesized substance has a very high value more than 4.26 in log scale. Td value is more than 300 C, which shows high thermal stability. This showed quite excellent results in optical property and thermal stability.</P>
Park, Youngil,Kim, Beomjin,Lee, Ki-Ho,Lee, Ji-Hoon,Oh, Se-Young,Park, Jongwook American Scientific Publishers 2012 Journal of nanoscience and nanotechnology Vol.12 No.5
<P>DPBP-EPY has the same structure with DPBP-EIF, one of blue-light-emitting materials, except their cores, in which the former has two imine groups, but the latter has only carbon-containing groups. The electro-optical properties modulated by the adoption of the different core structures were systematically examined. It was confirmed that the maximum values in the UV-visible and PL spectra of DPBP-EPY were about 19-46 nm red-shifted from those of DPBP-EIF due to the electron-withdrawing effect of the imine groups whether in solution or in solid. In addition, in case of DPBP-EPY where imine group is substituted, LUMO level of DPBP-EPY decreased while HOME level did not show any significant change. Furthermore, the results of the non-doped OLED device built with these two materials for an emitting layer indicated that DPBP-EPY needed about 2 V lower operation-voltage, and produced higher quantum yield than DPBP-EIF. In particular, it was shown that DPBP-EPY emitted purer and deeper blue-light with CIE coordinate (0.157,0.131) than DPBP-EIF with CIE coordinate is (0.179, 0.191).</P>
( Jongwook Oh ),( Howard Chu ),( Jung-won Park ),( Chang Ook Park ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.2
Background: Treatment with omalizumab, a humanized recombinant monoclonal anti-IgE antibody, results in clinical efficacy in patients with CSU. But currently most of available studies were based on Western countries. Objectives: To determine the efficacy and safety of omalizumab, and analyze the clinical and laboratory parameters for omalizumab treatment response. Methods: This study was a retrospective single-center study. 56 patients treated with omalizumab were analyzed. Each patient’s medical records, baseline laboratory results, response of omalizumab and adverse effects were reviewed. Physician global assessment scale was used to evaluate efficacy. Results: .48 patients receiving omalizumab showed a greater improvement of symptoms and physician global assessment score. Eight patients (3 males, 5 females) were considered to be non-responders. Three patients of non-responder group were cholinergic urticaria, dermographism, and urticarial vasculitis. All of the responders were diagnosed with spontaneous urticaria. Baseline IgE was much lower in non-responder group, in which the mean serum IgE level of responder group was 268.97IU/ml(range 27.2-1990) and 134.6IU/ml (range 15.9-308) for the non-responder group. Conclusion: Omalizumab demonstrated highly effective and safe treatment profiles in Korean chronic urticaria patients consistent with the previous reports mainly from Western countries. Baseline IgE level may be a potential immunological predictor of response
( Jongwook Oh ),( Ro Woo Lee ),( Hee Ra Lee ),( Seon Bok Lee ),( Hyun Jeong Ju ),( Jungwon Park ),( Hee Ryun Park ),( Ji Hun Park ),( Seung-kyung Hann ),( Abdurrahman Almurayshid ),( Jeonghyun Shin ) 대한피부과학회 2020 대한피부과학회 학술발표대회집 Vol.72 No.1
Background: The classification of segmental vitiligo has been previously reported but more consensus on its classification is required from a large number of patients to predict its spreading and provide valuable clues to the etiology of segmental vitilig. Objectives: To classify segmental vitiligo on the whole body into several distinctive subtypes according to distributions and clinical characteristics. Methods: Total 956 patients with segmental vitiligo were enrolled. A new classification of has been proposed according to distribution patterns. The clinical course of segmental vitiligo, including recurrence rate and patterns, concurrence of non-segmental vitiligo, and treatment response, was assessed. Results: Facial and truncal segmental vitiligo was classified into each 5 patterns. Among 501 patients who had been followed up for at least one year, 55 patients (11%) showed recurrence after stabilization for more than 6 months. Most recurrence happened within the area of each subtype of segmental vitiligo in the new classification (92.7%). Conclusion: Our data suggest that segmental vitiligo has a higher recurrence rate than previously known. This new classification can help dermatologists in patient’s real care