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윤성철,김상욱,배성일,강성호,김용천,정승재,김상우,문상훈,Yun, Seong-Cheol,Kim, Sang-Uk,Bae, Seong-Il,Gang, Seong-Ho,Kim, Yong-Cheon,Jeong, Seung-Jae,Kim, Sang-U,Mun, Sang-Hun 대한전자공학회 2002 電子工學會論文誌-SD (Semiconductor and devices) Vol.39 No.2
A new high-performance DSP architecture is proposed, which behaves as a coprocessor of a 32bit microcontroller. Because the proposed DSP architecture is a dual MAC(Multiply and Accumulate) DSP architecture, it can process efficiently a number of SOP(sum of product) operations used in many DSP applications. In order to efficiently perform other operations such as pure additions without any restriction, a MAC is composed of a multiplier and a ALU placed in parallel. In addition, it is a 3-way superscalar architecture, which can issue 3 instructions at a time. The benchmark results with 3 thor dual MAC DSPs show that the proposed DSP has the best performance. Futhermore, it is proven that the proposed DSP is more efficient in memory usage, although the performance is comparable in some algorithms such as Viterbi decoding and FFT butterfly. 이 논문은 저전력 마이크로 컨트롤러의 coprocessor로 동작하는 고성능 DSP의 아키텍쳐 구조를 제안한다. 제안된 DSP 아키텍쳐는 DSP 응용 분야의 기본 수식인 곱의 합을 고속으로 수행할 수 있도록 MAC(Multiply and Accumulate) 유닛 두 개를 갖는 dual MAC 아키텍쳐 구조이면서, 곱셈기와 덧셈기를 병렬적으로 배치시킨 특징을 갖는다. 그리고 한번에 최대 3개의 명령어를 동시에 수행할 수 있으면서도 명령어 길이는 31 비트로 고정된 3웨이 수퍼스칼라 구조를 갖는다. 현재 상용되고 있는 세 개의 DSP들과 의 벤치마크 결과, 제안된 DSP 구조가 가장 좋은 성능을 보여주었다. 또한, 특정 알고리듬에 대해서 성능이 같아도 메모리 사용량에 있어 효율적인 구조라는 것을 보여준다.
위협 모델링 기반 함정 전투체계 보안 요구사항에 관한 연구
윤성철,손태식,Seong-cheol Yun,Tae-shik Shon 한국군사과학기술학회 2023 한국군사과학기술학회지 Vol.26 No.3
The shipboard combat system is a key system for naval combat that supports a command and control process cycle consisting of Detect - Control - Engage in real time to ensure ship viability and conduct combat missions. Modern combat systems were developed on the basis of Open Architecture(OA) to maximize acceptance of latest technology and interoperability between systems, and actively introduced the COTS(Commercial-of-the-shelf). However, as a result of that, vulnerabilities inherent in COTS SW and HW also occurred in the combat system. The importance of combat system cybersecurity is being emphasized but cybersecurity research reflecting the characteristics of the combat system is still lacking in Korea. Therefore, in this paper, we systematically identify combat system threats by applying Data Flow Diagram, Microsoft STRIDE threat modelling methodology. The threats were analyzed using the Attack Tree & Misuse case. Finally we derived the applicable security requirements which can be used at stages of planning and designing combat system and verified security requirements through NIST 800-53 security control items.
경제위기에 따른 사망률 불평등의 변화: 지역의 사회경제적 위치 지표의 활용
윤성철,황인아,이무송,이상일,조민우,이민정,강영호,Yun, Sung-Cheol,Hwang, In-A,Lee, Moo-Song,Lee, Sang-Il,Jo, Min-Woo,Lee, Min-Jung,Khang, Young-Ho 대한예방의학회 2005 예방의학회지 Vol.38 No.3
Objectives : An abrupt economic decline may widen the socioeconomic differences in health between the advantaged and disadvantaged in a society. The aim of this study was to examine whether the South Korean economic crisis of 1997-98 affected the socioeconomic inequality from all-causes and from cause-specific mortality between 1995 and 2001. Methods : Population denominators were obtained from the registration population data, with the number of death (numerators) calculated from raw death certificate data. The indicator used to assess the geographic socioeconomic position was the per capita regional tax revenue. Administrative districts (Si-Gun-Gu) were ranked according to this socioeconomic measure, and divided into equal population size quintiles on the basis of this ranking. The sex- and 5-year age-specific numbers of the population and deaths were used to compute the sex- and age-adjusted mortality rates (via direct standardization method), standardized mortality ratios (via indirect standardization methods) and relative indices of inequality (RII) (via Poisson regression). Results : Geographic inequalities from all-causes of mortality, as measured by RII, did not increase as a result of the economic crisis (from 1998-2001). This was true for both sexes and all age groups. However, the cause-specific analyses showed that socioeconomic inequalities in mortalities from external causes were affected by South Korean economic crisis. For males, the RIIs for mortalities from transport accidents and intentional self-harm increased between 1995 and 2001. For females, the RII for mortality from intentional self-harm increased during the same period. Conclusions : The South Korean economic crisis widened the geographic inequality in mortalities from major external causes. This increased inequality requires social discourse and counter policies with respect to the rising health inequalities in the South Korean society.
윤성철(Sung Chul Yun),윤윤수(Yun Soo Yun),빈기태(Khi Tai Bhin),신영태(Young Tai Shin) 대한내과학회 1996 대한내과학회지 Vol.51 No.5
N/A Objectives: Interleukin-6 (IL-6) is a pleiotrophic cytokines which is related to immune system activation, acute phase reactants, hematopoietic regulatory function, and cell growth as well as the first cytokine that may be directly related to pathogenesis of autoimmune disease, as systemic lupus erythematosus. The production site of IL-6 has been confined to T cell, B cell, macrophage, fibroblast, myeloma cell, myxoma cell, endothelial cell, especially mesangial cell and other glomerular cell in the kidney until now. However, recently uroepithelial cell stimulated by the bacteria and renal tublar cell damaged by immunologic injury were reported to be a another possible production site of IL-6. Therefore, Authors chose cases of lupus nephritis that was confirmed by renal biopsy. Methods: We observed the expression of IL-6 by using the immunohistochemical staining and tried to estimate the role of IL-6. The patients classified as class 4, 5 that had a strong proliferative change histologically were mainly selected as specimens for a research. The specimens were studied immunohistologically and its clinical data were compared in various ways. Results: 1) Positive IL-6 expression was observed in 16 cases (80%) of total 20 cases. IL-6 positive cases of glomerulus were accompanied with the strong IL-6 expression of renal tubules all the time. 2) The stronger IL-6 expression more than (+ +) was confirmed in 7 cases of 12 class 4 cases (87.5%). 3) The incidence of nephrotic syndrome and the case of decreased complement (C3, C4) were more prevalent in the group of positive IL-6 when compared to the group of negative IL-6. Conclusions: IL-6 has a strong association with renal tubular cells and play an important role in cellular proliferation of glomerulus as well as in disease activity of lupus nephritis.