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Variable Length Coding of Quantized DCT Coefficients using Adaptive Huffman Codebook Selection
전병우,Park, Ju Ha,Jeong, Je Chang 대한전자공학회 1994 ISPACS:Intelligent Signal Processing and Communica Vol.1 No.1
In this paper, we propose a huffman coding method for image sequence compression which acn adaptively choose the vest codeword table among the given set of tables so that maximum possible bit saving can be achieved. Experimental results show the bit saving dependence upon different codesord tables and verify effectiveness of the proposed method of adaptive codeword table selection over the current MPEG 2 coding method.
전병우,문성미,김수영,박혜윤,전경만,권오정,허희재,기창석,이남용,신성재,( Charles L. Daley ),고원중 대한결핵 및 호흡기학회 2017 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.124 No.-
Treatment outcomes of Mycobacterium avium complex lung disease (MAC-LD) have occasionally been unsatisfactory despite long-term antibiotic therapy. The aim of this study was to evaluate the incidence of development of macrolide resistance and the proportion of reinfection rate in patients with refractory MAC-LD. Among 566 patients with treatment-naive MAC-LD who started antibiotic treatment betwwen January 2002 and December 2013, we identified 72 refractory MAC-LD patients with persistent sputum culture despite more than 12 months of treatment. Macrolide resistance was developed in only 15 (21%) patients. Median time to occurrence of macrolide resistance from starting treatment was 58.8 months (interquartile range, 42.3-85.9 months). Of the 49 patients who had both pretreatment and more than one on-treatment sputum isolates, bacterial genotyping revealed that reinfection by new MAC strains developed in 36 (73%) patients; the new strains were found in 24 (49%) patients and mixed infections with original and new strains occurred in 12 (24%) patients. Only 13 (27%) patients had a persistent infection by same MAC strains. Our data suggest that the refractory MAC-LD is commonly caused by frequent reinfection with new strains rather than persistence of original strains, and these may explain the lower incidence of macrolide resistance in refractory MAC-LD despite long-term antibiotic therapy.
스마트 제조 실행 시스템 기본설계를 위한 시스템 엔지니어링 적용 방법에 대한 연구
전병우,신기영,홍대근,서석환,Jeon, Byeong-woo,Shin, Kee-Young,Hong, Dae-Geun,Suh, Suk-Hwan 한국시스템엔지니어링학회 2015 시스템엔지니어링학술지 Vol.11 No.2
Manufacturing Execution System(MES) is in charge of manufacturing execution in the shop floor based on the inputs given by high level information such as ERP, etc. The typical MES implemented is not tightly interconnected with shop floor control system including real (or near real) time monitoring and control devices such as PLC. The lack of real-time interfaces is one of the major obstacles to achieve accurate and optimization of the total performance index of the shop floor system. Smart factory system in the paradigm of Industry 4.0 tries to solve the problems via CPS (Cyber Physical System) technology and FILS (Factory In-the-Loop System). In this paper, we conducted Systems Engineering Approach to design an advanced MES (namely Smart MES) that can accommodate CPS and FILS concept. Specifically, we tailored Systems Engineering Process (SEP) based on an International Standard formalized as ISO/IEC 15288 to develop Stakeholders' Requirements (StR), System Requirements (SyR). The deliverables of each process are modeled and represented by the SysML, UML customized to Systems Engineering. The results of the research can provide a conceptual framework for future MES that can play a crucial role in the Smart Factory.
전병우,김수영,공진현,박재로,박수영,심명아,전경만,박혜윤,신성재,고원중 대한결핵 및 호흡기학회 2016 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.121 No.-
Citation analyses aid in assessing quality, trends, and future directions of research fields. We aimed to identify the most influen-tial articles on infections caused by nontuberculous mycobacteria (NTM) in the last 20 years. We performed a cited reference search of the database Web of Science from 1995 to 2015. The 100 most-cited articles on NTM infections were analyzed. The top 100 articles were cited from 114 to 1,471 times and were published from 1995 to 2013. Sixty-five were laboratory-based, basic science articles, with the major topics being pathophysiology (n = 20) and molecular methods for NTM identification (n = 15). Among the 35 non-laboratory studies, major topics were clinical management (n = 15) and epidemiology (n = 14). The top article was a clinical treatise on the management of NTM disease published in 2007. Although there was a correlation between article rank and journal impact factor (P = 0.043, rho = -0.202), the five articles from the journals with highest impact factors did not rank within the top 10 articles. In conclusion, a large proportion of influential articles on NTM infection are basic scientific studies, and the most influential articles are not always published in high-impact journals.
전병우,허희재,고원중 대한의사협회 2019 대한의사협회지 Vol.62 No.1
The incidence and prevalence of pulmonary tuberculosis (TB) in South Korea remain high despite the fact that South Korea is a high-income country, and pulmonary TB is an important public health issue in terms of both morbidity and mortality. Thus, rapid diagnosis and management of active pulmonary TB are crucial for effective TB control, which can help to prevent the transmission of TB and the occurrence of new TB cases. However, because the clinical and radiological presentations of pulmonary TB may occasionally be nonspecific, identification of causative microorganisms using laboratory tests is the most important diagnostic method. Recently-developed microbiological and molecular techniques are commonly employed in current clinical practice. In particular, advances in liquid culture system, line probe assays, and Xpert MTB/RIF assay have reduced the identification time and facilitate the identification of drug-resistance TB. However, as various tests have both advantages and limitations, physicians should be aware of the principles underpinning the tests when interpreting the results. Thus, the clinical and radiological characteristics of pulmonary TB and several diagnostic laboratory tests that we describe below will aid physicians in diagnosing pulmonary TB efficiently