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박성주 漢陽大學校 工學技術硏究所 2000 工學技術論文集 Vol.9 No.1
부분스캔 설계는 하위수준의 정보와 상위수준의 정보에 의한 방법으로 분류해볼 수 있다. 구조적 분석과 테스트가능도에 의한 방법은 오직 하위수준의 정보만 사용한다. 즉 게이트 수준의 정보만을 사용한다. 그러나, 본 논문에서는 상위수준의 정보에 의한 부분스캔 알고리즘을 제안하고자 한다. 상태 테이블의 상태변수의 비트 천이를 분석함으로써 구조적 분석방법에 대해 비교할 만한 고장점검도로 스캔 플립플롭을 선택하는데 걸리는 시간을 매우 줄일 수 있었다. The partial scan design can be classified into the techniques based on the low level information and the high level information. The techniques by structural analysis and testabilities use only the low level information, namely the structural information of the gate level. But in this paper, we introduce a new partial scan algorithm based on the high level information. By analyzing the bit transitions of state variables in the state table, the time taken to select scan flip-flops can be considerably reduced with comparable fault coverage on the structural methods.
식물의 초기 잎권세균 군집 구조에 대한 분자생물학적 분석 및 산성강하물이 미치는 영향
박성주,정필문 대전대학교 기초과학연구소 2000 自然科學 Vol.11 No.1
초기 잎권세균의 군집 구조를 계통분류에 의하여 규명하기 위하여 떡갈나무(Quercus dentate Thunb.)의 어린 잎을 대상으로 하였으며 동시에 산성강하물과 같은 대기오염이 세균군집 구조에 미치는 영향을 파악하기 위하여 공단지역과 청정자연녹지지역에 서식하는 나무의 잎을 채취하여 비교 분석하였다. 잎권세균의 16S rRNA 유전자를 PCR로 증폭하여 cloning한 결과 모두 30개의 clone을 얻었다. 이 clone들을 모두 제한효소인 HaeⅢ 및 Hinf Ⅰ로 잘라 restriction fragment length polymorphism(RFLP)을 비교 분석한 결과 9개의 독특한 RFLP 패턴 즉 계통형(phylotypes)으로 분류되었다. 이 가운데 단 1개의 계통형만이 두 지역 모두의 잎에서 나왔으며 공단지역 잎에서는 모두 7개의 계통형이 청정지역 잎에서는 모두 3개의 계통형이 확인되었다. 이런 결과에서 우리는 두 지역의 떡갈나무 잎에서 서식하는 잎권세균 군집이 현저히 다르며 공단지역 잎권세균군집이 청정지역에 비하여 훨씬 다양함을 알 수 있는 것이다. 이 9개의 계통형에 속하는 대표적인 clone들을 대상으로 염기서열을 분석하여 계통분류를 실시한 결과 잎권세균은 Bacteria 도메인(domain) 가운데 γ-Proteobacteria와 β-Proteobacteria 만이 나타날 정도로 군집구조가 아주 단순한 것으로 확인되었다. 속 수준으로 계통분류한 결과 가장 우점하는 잎권세균은 γ-Proteobacteria에 속하는 Pseudomonas 속이었다. 공단지역 잎권세균 군집에 있어 한 가지 특징은 청정지역 잎권에서 흔히 발견되는 장내세균 즉 Enterobacteriaceae가 전혀 검출되지 않았다는 사실이다. Early epiphytic bacterial community structure on the young leaves of deciduous oak trees (Quercus dentate Thunb.) collected from two types of area, polluted industrial and clean natural forest areas, were assessed by phylogenetic analysis. PGR-amplified 16s rRNA genes from epiphytic bacteria were cloned, and a total of 39 eubacterial clones were obtained from two leaf libraries. All of the clones were characterized by restriction fragment length polymorphism (RFLP) with the enzymes HaeⅢ and Hinf Ⅰ, and thus nine unique RFLP patterns (phylotypes) were identified. Only one phylotype was recovered from the bacterial communities on both leaves. Seven phylotypes were from industrial leaves, whereas only thee were from natural forest ones. This means that the epiphytic bacterial community structures are significantly different and the communities of industrial leaves are much more diverse than those of clean natural ones. By phylogenetic analysis, the cloned sequences were placed into two major lineages of the domain Bacteria, the γ- and β-subphylums of the phylum Proteobacteria. At the subphylum level, the predominant group was genus Pseudomonas of the γ-Proteobacteria. A surprising finding is that enteric bacteria were not detected on industrial leaves.
박성주,백건욱,류경범,황태원,이상주,한윤수 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Zinc oxide (ZnO) has a band gap energy of 3.3 eV, which is similar to that of TiO<sub>2</sub> used as a n-type semiconductor in solar cells, and has higher electron mobility than TiO<sub>2</sub>. Thus, ZnO film can act as the n-type semiconductor in solar cells. However, ZnO-based solar cells suffer from low power conversion efficiency, because Zn<sup>2+</sup>/dye complex is formed during prolonged sensitization process. The complex could hinder electron injection from excited dye to ZnO. In this study, electrophoretic technique was applied to increase dye-loading amount in a short sensitization time. The dye-loading amount by electrophoretic method for 20 min was increased by 2.18x10<sup>-5</sup>mol/㎤, compared to that (1.56x10<sup>-5</sup>mol/㎤) by conventional soaking process for the same time. This led to an increase in power conversion efficiency of ZnO-based solar cells.
박성주,Mi Seon Park,Chi Ryang Chung,Ju Sin Kim,Seoung Ju Park,이흥범 대한중환자의학회 2016 Acute and Critical Care Vol.31 No.3
Background: Colistin (polymyxin E) is active against multidrug-resistant Gram-negative bacteria (MDR-GNB). However, the effectiveness of inhaled colistin is unclear. This study was designed to assess the effectiveness and safety of aerosolized colistin for the treatment of ventilator-associated pneumonia (VAP) caused by MDR-GNB. Methods: In this retrospective longitudinal study, we evaluated the medical records of 63 patients who received aerosolized colistin treatment for VAP caused by MDR-GNB in the medical intensive care unit (MICU) from February 2012 to March 2014. Results: A total of 25 patients with VAP caused by MDR-GNB were included in this study. The negative conversion rate was 84.6% after treatment, and acute kidney injury (AKI) occurred in 11 patients (44%, AKI group). The average length of MICU stay and colistin treatment- related factors, such as daily and total cumulative doses and administration period, were not significantly different between groups. In-hospital mortality tended to be higher in the AKI group (p = 0.07). Multivariate analysis showed that a body mass index less than 18 was an independent risk factor of mortality (odds ratio [OR] = 21.95, 95% confidence interval [CI] 1.59-302.23; p = 0.02). Notably, AKI occurrence was closely related to the administration of more than two nephrotoxic drugs combined with aerosolized colistin (OR = 15.03, 95% CI 1.40-161.76; p = 0.025) and septic shock (OR = 8.10, 95% CI 1.40-161.76; p = 0.04). Conclusions: The use of adjunctive aerosolized colistin treatment appears to be a relatively safe and effective option for the treatment of VAP caused by MDR-GNB. However, more research on the concomitant use of nephrotoxic drugs with aerosolized colistin will be necessary, as this can be an important risk factor of development of AKI.
박성주 漢陽大學校 工學技術硏究所 2001 工學技術論文集 Vol.10 No.-
본 논문에서는 개선된 메모리 테스트 알고리즘을 칩 내에서 수행하는 BI5T 회로를 설계하였다. 기존의 March 알고리즘으로는 CMOS ADOF를 점검할 수 없다. 주소생성 방법과 데이터 생성 방법을 달리해도 기존의 고전적인 고장을 점검할 수 있다는 자유도를 이용 CMOS ADOF를 점검할 수 있는 수정된 March 알고리즘이 제안되었다. 본 논문에서는 수정된 March 알고리즘을 instruction set으로 구성하고, NPSF 검출을 위한 Cellular Automata 주소 생성기를 사용하여 테스트 알고리즘 추가 및 수정 시 확장성과 유연성이 높고 추가 면적이 적은 microcode-based BIST 회로를 구현하였다. A new microcode-based BIST(Biult-In Self Test) circuitry for embedded memory components is proposed in this paper. The memory BIST implements march algorithms which are slightly modified by adopting DOF(Degree of Freedom) concept to detect ADOFS(Address Decoder Open Faults) on top of conventional stuck faults. Furthermore it is shown that the march BIST modified can capture a few NPSFS(Neighborhood Pattern Sensitive Faults) coupled with the Cellular Automata address generator and patterns. The microcode-based memory BIST proposed lends itself to performing different combinations of march and retention tests with less microcode storage than the other approaches.