TFT-LCD 드라이버를 위한 8-bit 230MSPS Analog Flat Panel InterFACE의 설계

윤성욱,임현식,송민규,Yun, Seong-Uk,Im, Hyeon-Sik,Song, Min-Gyu 대한전자공학회 2002 電子工學會論文誌-SD (Semiconductor and devices) Vol.39 No.2

본 논문에서는 UXGA(Ultra extended Graphics Array)급 TFT LCD Driver를 지원하는 Analog Flat Panel Interface(AFPI)용 Module을 설계하였다. 제안하는 AFPI는 8-b ADC, 자동이득 제어기(AGC), 저잡음 PLL로 구성 되어있다. 8-b ADC는 고속동작과 저전력 기능을 위한 새로운 구조로서 FR(Folding Rate)이 8, NFB(Number of Folding Block)이 2, Interpolation rate이 16이며, 분산 Track and Hold구조를 사용하여 Sampling시 입력주파수를 낮추어 높은 SNDR을 얻을 수 있었다. 또한 Gain과 Clamp을 통제 할 수 있는 Programmable한 AGC, 낮은 Jitter Noise PLL을 설계하였다. 제안된 Module은 0.2㎛, 1-Poly 5-Metal, n-well CMOS공정을 사용하여 제작되었으며, 유효 칩 면적은 3.6mm × 3.2mm이고 602㎽의 전력소모를 나타내었다. 입력 주파수는 10㎒, 샘플링 주파수 200㎒에서의 INL과 DNL은 ±1LSB 이내로 측정되었으며, SNDR은 43㏈로 측정되었다. In this paper, an Analog Flat Panel interface(AFPI) which supports for UXGa(Ultar extended Graphics Array)-Compatible TFT LCD Driver is designed. The Proposed AFPI is composed of 8-b ADC, Automatic Gain Control(AGC), Low-Jitter PLL. In order to obtain a high speed and low power consumption, an efficient architecture of 8-bit ADC is proposed, whose FR(Folding Rate) is 8, NFB(Number of Folding Block) is 2, and IR (Interpolating Rate) is 16. We can get high SNDR by adopting distributed track and hold circuits. Also a programmable AGC which is possible to control gain and clamp, and a low-jitter PLL are proposed. The chip has been fabricated with 0.25${\mu}{\textrm}{m}$ 1-poly S-metal n-well CMOS technology. The effective chip area is 3.6mm $\times$ 3.2mm and it dissipates about 602㎽ at 2.5V power supply. The INL and DNL are within $\pm$ 1LSB. The measured SNDR is about 43㏈, when the input frequency is 10MHz at 200MHz clock frequency.

A86 Duplex 터널 방재시설에 대한 분석

윤성욱,조형제,Yun, Seong-Uk,Jo, Hyeong-Je 한국터널지하공간학회 2009 자연, 터널 그리고 지하공간 Vol.11 No.4

말에서 분리한 Escherichia coli의 특성 및 항생제 감수성

윤성욱,권도연,최성균,이희수,조길재,Yun, Sung-Wook,Kwon, Do-Yeon,Choi, Seong-kyoon,Lee, Hee-Soo,Cho, Gil-Jae 대한수의학회 2010 大韓獸醫學會誌 Vol.50 No.3

This study was conducted to investigate characteristics and antimicrobial susceptibility of Escherichia (E.) coli isolates isolated from vaginal mucosa and clitorial fossa of 105 Thoroughbred mares suspicious of the genital disease in Korea during the period from March 2006 to July 2007. Ninety six E. coli isolates were identified as standard biochemical properties and using BIOLOG system. Fifty three isolates (55.2%) could be classified into a total of 21 O serotypes and forty three isolates (44.8%) were non-typeable with 51 O antisera used in this study. The verotoxin 1 (VT 1) and verotoxin 2 genes were analyzed by multiplex PCR. Among them, one isolate was detected VT 1 gene (130 bp). Most of isolates showed a high susceptibility in ciprofloxacin (100%), enrofloxacin (100%), norfloxacin (100%), cefoxitin (96.9%), gentamicin (96.9%), sulphamethoxazole (96.9%), nitrofurantoin (94.8%), amikacin (93.8%), nalidixic acid (92.7%) and tetracycline (90.6%). These results may provide the basic information to establish strategies for the treatment and prevention of reproductive disease in Thoroughbred mares in Korea.

논토양의 환원환경에서 비소 및 중금속의 용출특성과 제강슬래그의 처리효과

윤성욱,유찬,윤용철,강동현,이시영,손진관,김동현,Yun, Sung-wook,Yu, Chan,Yoon, Yong-Cheol,Kang, Dong-Hyeon,Lee, Si-Young,Son, Jinkwan,Kim, Dong-Hyeon 한국농공학회 2016 한국농공학회논문집 Vol.58 No.3

There have been only a few studies focused on the stabilization of metal (loid)s in anaerobic soils such as paddy soils. In this study, laboratory-scale column tests were conducted to artificially manipulate anoxic conditions in submerged paddy fields and we observed the release behavior of As, Cd, Pb, and Zn, as well as to examine the stabilization effect of steel refining slag (SRS) on the metal(loid)s. The leachate samples were collected and chemical parameters were monitored during the test period. Results suggest that anoxic conditions were developed during submersion, and that As or heavy metals (particularly Cd) fractions bound to ferrous (Fe) /manganese (Mn) oxides were easily dissociated. Moreover, As is also reduced by itself to a trivalent form with higher mobility in the reducing environment of rice paddy soil. However, it was also shown that SRS significantly decreased the dissolution of Zn, Pb, Cd, and As in the the leachates; their removal rates in the SRS-treated soil were 66 %, 45 %, 24 %, and 84 %, respectively, of those in the control soil.

폐금속 광산 주변 농경지 토양에서 석회석 처리에 의한 중금속의 식물유효도 변화 및 작물의 중금속 축적

윤성욱,유찬,Yun, Sung-Wook,Yu, Chan 한국농공학회 2012 한국농공학회논문집 Vol.54 No.3

As topographic characteristics of Korea where 64 % of the national land area is forest and only 17 % is being used as farmland, remediation of farmland contaminated by heavy metals is a considerably important issue. In this study, as an alternative of practically and effectively remediating farmland which was abandoned as its crop plants exceeded maximum residue limit of heavy metals due to mining impact, applicability of stabilization method was examined through the pilot-scale field experiment. Three plots ($L{\times}W{\times}D=3m{\times}2m{\times}0.3m$) were installed at the selected farmland and in plot 1, only soil of the selected farmland was applied, in pilot 2, soil of the selected farmland plus 3 % limestone (w/w) was applied and in pilot 3, soil of the selected farmland plus 3 % limestone was applied and then uncontaminated soil was covered thereon (0.3 m). After that, seeds of radish, Korean cabbage and soybean of which characteristics of edible portions are different were sowed on each plot and cultivated. Afterwards, at a proper harvesting time (app. 80 days later), crop plants and soil were collected and phytoavailability (0.11 M HOAc extractable) of heavy metals in soil and accumulated concentration of heavy metal in edible portion of crop plants were examined. As a result, it was revealed that phytoavailability of heavy metals in soil added with limestone (plot 2) was clearly reduced compared with plot 1 (untreated) and owing to this treatment, accumulated concentration of heavy metals in edible portion of crops was also clearly reduced compared with plot 1. While radish cultivated in plot 1 had exceeded maximum residue limit of agricultural products, in particular, plot 2 using limestone had shown concentration lower than maximum residue limit and this plot had shown little difference with 3 plot where crop was cultivated in uncontaminated soil cover. Therefore, it was considered that for abandoned farmland like the selected farmland, reducing mobility and phytoavailability of heavy metals and reducing crop uptake through stabilization method would be an effective and practical alternative for producing safe agricultural products on a sustained basis.

3D 프린팅 기술의 의료기기 수리 적용에 대한 국내 규제 이슈 및 기술적 적합성 평가

윤성욱,남경원,Yun, Sung Uk,Nam, Kyoung Won 대한의용생체공학회 2020 의공학회지 Vol.41 No.2

In large-scale hospitals, the department of biomedical engineering should always provide quick repair service for damaged medical devices to guarantee continuous patient treatment. However, in actual circumstances, there are so many time-consuming issues that delays device repair for weeks or even months; therefore, it is required to prepare alternative ways for quick repair service. In this study, we first mentioned about the regulation issues in Korea about the 3D printing-based medical device repair, and then introduced the results of our preliminary study that evaluated the feasibility of 3D printing-based medical device repair before real-field application. Results of the study demonstrated that, in all of the 23 cases, parts for repair that were manufactured by 3D-printing were successfully fixed and connected to the main body of the original device, and showed sufficient rigidity for protecting internal parts of the device. Considering the experimental results, medical device repair by applying 3D printing technology can be a promising alternative in cases when regular repair process is not available or takes too much time.

폐금속 광산의 영향을 받는 농경지 토양 내 금속성분 오염의 공간적 분포특성: 충청남도 부여군의 사례연구

윤성욱,김동현,강동현,이시영,손진관,김해도,윤용철,유찬,Yun, Sung-Wook,Kim, Dong-Hyeon,Kang, Dong-Hyeon,Lee, Si-Young,Son, Jinkwan,Kim, Hae-Do,Yoon, Yong-Chel,Yu, Chan 한국농공학회 2017 한국농공학회논문집 Vol.59 No.6

In this study, the concentrations of As, Cd, Cu, Pb and Zn in agricultural soils across a region of South Korea (Buyeo County) were investigated. Their pollution sources were assessed using multivariate statistical analysis, and Geographic Information System (GIS) technology was used to determine the distribution of these elements. Surface soil samples were collected from 114 locations across the agricultural fields in the study site. Cu and Zn were derived from natural sources (i.e., parent rocks of the soil), whereas As, Cd, and Pb were found to be originated from abandoned mines. The results of this study clearly show that the transport of anthropogenic As, Cd, and Pb is governed mostly by the specific environment of the paddy soil. Our approach was effective in clearly identifying the sources of metals and analyzing their contamination characteristics. We believe this study will provide useful information to future studies on soil pollution by anthropogenic sources.

도로터널 화재위험의 정량적 평가 기법 개발

윤성욱,김성구,Yun, Seong-Uk,Kim, Seong-Gu 한국터널지하공간학회 2005 자연, 터널 그리고 지하공간 Vol.7 No.4

간척지 적용 온실기초 설계를 위한 검토

윤성욱 ( Sungwook Yun ),유찬 ( Chan Yu ),윤용철 ( Yongcheol Yoon ) 한국농공학회 2012 한국농공학회 학술대회초록집 Vol.2012 No.-

농수산식품 시장개방의 확대로 현재 우리나라는 국내 농수산식품의 수출 증대와 그 경쟁력을 갖추는 것이 무엇보다도 중요한 시점에 있다. 2011년 농수산식품 수출액은 전년대비 약 32% 증가한 약 77억 달러로서 매년 지속적으로 증가하고 있는 실정이다. 이와 같이 농수산식품의 수출을 지속하기 위해서는 장애요인으로 지적받고 있는 안정적인 수출물량의 확보, 물류비용의 절감, 품질관리 부족 등의 문제를 해결하기 위한 대단위 생산단지 조성의 필요성이 대두되고 있다. 국내 주요 간척지는 시화, 화웅 등 7개 지역정도이며, 총면적은 약 79,000ha로서 이 중 농경지 면적은 약 34,200ha정도이다. 이러한 간척지들은 한동안 주로 일반 농지로 사용되어 왔지만, 최근 간척지 내 농경지의 고도이용을 위해서 간척지 특성을 활용한 부가가치가 높은 작물생산지로서의 규모화, 단지화된 시설원예단지의 구체적인 조성방안이 대두되고 있는 실정이다. 주요 간척지에 계획된 시설원예단지의 면적은 약 3,000ha 정도이며, 이들 간척지 중 일부 간척지에 대해서는 현재 대단위 첨단시설원예 단지가 조성 중에 있거나 계획을 추진 중에 있다. 간척지에 시설원예단지의 조성은 우리 농업을 수출농업으로 전환하기 위해 절대적으로 필요한 전략이며, 국외에서 유입되는 농산물에 대한 적극적인 대응 반안 중의 하나이다. 시설원예 선진국인 네덜란드를 비롯하여 일본 등은 오랜 기간 동안 온실과 관련하여 다양한 연구 등을 통해 기술의 정립은 물론 정책이나 제도 등으로 자국에 적합한 설계기준들이 확립되어 있다. 이에 반해 국내의 경우는 온실구조설계기준이 각 관련 기관별로 상이하고 명확하지 않아 합리적이고 경제적인 기초설계가 이루어지지 못하고 있다. 특히 간척지는 일반 농경지와 달리 상대적으로 연약지반이며 해안에 접해있어 구조물의 침하, 강풍 등에 노출될 위험성이 매우 큼에도 불구하고 간척지의 지반특성과 기상조건을 고려한 관련 국내 연구는 매우 미미한 실정이다. 따라서 현재 농업발전 전략의 일환으로 간척지의 활용도가 증가하고 있는 시점에서 국내 간척지의 특성을 고려한 효율적인 온실기초의 설계, 시공 및 유지관리 기준이 시급히 마련되어야 할 것이다. 이에 본 연구에서는 간척지에 경제적이고 효율적으로 온실기초를 적용하기 위한 설계기준을 제안하는 데 그 목적이 있다. 이를 위하여 앞으로 3년여 동안 국내 주요 간척지들을 대상으로 다양한 온실기초 및 구조 형태, 기상조건(풍하중, 설하중) 등을 고려한 설계외력, 지반특성 등을 고려하여 연구를 수행하고자 한다.

온실의 잉여 태양에너지 회수용 FCU 소요대수 검토

윤성욱(Sung-Wook Yun),최만권(Man Kwon Choi),김하늘(Ha Neul Kim),강동현(Donghyeon Kang),이시영(Siyoung Lee),손진관(Jinkwan Son),윤용철(Yong Cheol Yoon) (사)한국생물환경조절학회 2016 생물환경조절학회지 Vol.25 No.2

본 연구에서는 이미 보고된 잉여 태양에너지 관련 연구결과와 현재 현장에 설치되어 있는 냉난방용 FCU 현황을 개략적으로 검토한 후, 잉여 태양에너지 회수에 필요한 FCU의 소요대수 결정 방법을 개략적으로 제시하여 앞으로 이 분야의 연구자 및 기술자들에게 기조자료를 제시할 목적으로 연구를 수행하였다. 실험기간 동안 최대, 평균 및 최저 외기온은 각각 28.2℃, 4.4℃ 및 -11.5℃정도였다. 온실 밖의 수평면 일사량은 0.8~20.5MJ·m<SUP>-2</SUP>로 정도의 범위였으며, 평균 및 총 일사량은 10.8MJ·m<SUP>-2</SUP> 및 1,187.5MJ·m<SUP>-2</SUP>으로 나타났다. 그리고 주간동안 온실 내의 평균기온과 상대습도는 각각 18.8~45.5 및 53.5~77.5%정도였다. 실험기간 동안 온실로부터 회수한 총 잉여 태양에너지는 6,613.4MJ정도로서 총 난방에너지인 98,600.2MJ 약 6.7%정도를 보충할 수 있을 것으로 나타났다. 또한 사양이 유사한 FCU를 사용하지만, 난방을 위하여 설치되는 FCU의 대수는 제각각 다른 것을 알 수 있었고, 좀 더 효율적이고 경제적인 관점에서 설치높이, 방향 및 설치 간격, 적정 대수에 대한 연구가 이루어져야 할 것으로 판단된다. 잉여 태양에너지 회수용 FCU의 적정 소요대수는 FCU를 통과하는 공기의 질량 및 순환유량을 기준으로 각각 8.4~10.9대 및 6.1~8.0대 정도이었다. 여기에 계산방법이나 FCU의 효율 및 사용 환경 등 위험률을 고려하면, 결국 9대 전후(약 24m<SUP>3</SUP>당 1대 정도)를 설치하면 될 것으로 판단되었다. In this study, previously reported surplus solar energy-related study result and current status of fan coil unit (FCU) for cooling and heating installed in the current sites were briefly examined and then a method to determine the number of FCUs required to recover surplus solar energy was schematically proposed to provide basic data for researchers and technical engineers in this field. The maximum, mean, and minimum outside temperatures during the experiment period were about 28.2℃, 4.4℃, and -11.5℃, respectively. The horizontal surface solar radiation level outside the greenhouse was in a range of 0.8-20.5MJ•m<SUP>-2</SUP> and mean and total solar radiation were 10.8MJ•m<SUP>-2</SUP> and 1,187.5MJ•m<SUP>-2</SUP>. The mean temperature and relative humidity in the greenhouse during the daytime were in a range of 18.8-45.5 and 53.5-77.5%. The total surplus solar energy recovered from the greenhouse during the experiment period was approximately 6,613.4MJ, which could supplement about 6.7% of the total heating energy 98,600.2 MJ. In addition, the number of FCUs installed for heating varies case to case, although similar FCUs are used. Thus, it is necessary to study the installation height, orientation and installation distance as well as the appropriate number of FCUs from the efficient and economical viewpoints. The required numbers of FCUs for surplus solar energy recovery were 8.4-10.9units and 6.1-8.0units based on air mass and circular flow rate that passed through the FCUs. Considering calculation methods and the risks such as efficiency and use environments of FCUs, it was found that about nine units (one unit per 24 m<SUP>3</SUP> approximately) needed to be installed. The required number of FCUs for surplus solar energy recovery was around one unit per 24m<SUP>3</SUP> approximately.