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Byuk Sung Ko,Hyun Young Cho,Seung Mok Ryoo,Myung Chun Kim,Woong Jung,Sung Hyuk Park,Chang Min Lee,김원영 대한중환자의학회 2016 Acute and Critical Care Vol.31 No.4
Background: The prevalence and prognostic value of overt disseminated intravascular coagulation (DIC) in patients with septic shock presenting to emergency departments (EDs) is poorly understood, particularly following the release of a new definition of septic shock. The purpose of this study was to investigate the prevalence and prognostic value of DIC in septic shock. Methods: We performed retrospective review of 391 consecutive patients with septic shock admitting to the ED of tertiary care, university-affiliated hospital during a 16-month. Septic shock was defined as fluid-unresponsive hypotension requiring vasopressor to maintain a mean arterial pressure of 65 mmHg or greater, and serum lactate level ≥ 2 mmol/L. Overt DIC was defined as an International Society on Thrombosis and Hemostasis (ISTH) score ≥ 5 points. The primary endpoint was 28-day mortality. Results: Of 391 patients with septic shock, 290 were included in the present study. The mean age was 65.6 years, the 28-day mortality rate was 26.9%, and the prevalence of overt DIC was 17.6% (n = 51) according to the ISTH score. The median DIC score was higher in non-survivors than in survivors (5.0 vs. 2.0, p = 0.001). Significant higher risk of mortality was observed in overt DIC patients compared to those without (28.2% vs. 13.7%, p = 0.005). Multivariable logistic regression analysis identified DIC to be independently associated with 28-day mortality (odds ratio, 2.689 [95% confidence interval, 1.390-5.201]). Conclusions: Using the ISTH criteria of DIC, overt DIC in septic shock was found to be common among patients admitting to the ED and to be associated with higher mortality when it is accompanied with septic shock. Efforts are required to identify presence of overt DIC during the initial treatment of septic shock in patients presenting the the ED.
Byuk Kyu Lee,Sang Bin Lee,Eul Hyun Sung 한국유통과학회 2017 한국유통과학회 학술대회 논문집 Vol.2017 No.-
This paper deals with the characteristics of German innovation policy at the edge of the fourth industrial revolution. The focus here is on Industry 4.0, which is based on the research collaboration of the German Federal Government and a project of the same name in the high-tech strategy of the Federal Government. This paper examines whether German innovation policy already took a sociopolitical aspect of the policy such as mass unemployment into account in the development and design of new technologies in the context of the fourth industrial revolution. Above all, the relevance between the special features of the German innovation system and the characteristics of the Indirect 4.0 is analyzed. Particularly, the type of market economy as general conditions of the system of innovation is illuminated. The German innovation system is strong when it comes to the development of already existing knowledge and its implementation in high-quality goods and services. Furthermore, the characteristics of the industry as a German innovation policy in the age of the fourth industrial revolution lie in the fact that the problem dimensions are already taken into account in the development and design of new technologies to counteract a serious mistaken development in terms of unemployment, growth and the environment.
풍속의 불확실성을 고려한 확률적 최적조류계산에 관한 연구
조벽근(Byuk-keun Jo),장길수(Gilsoo Jang) 대한전기학회 2011 대한전기학회 학술대회 논문집 Vol.2011 No.10
Due to wind power integration, its uncertainty would be a very lethal factor in generation dispatch problem. Thus, such uncertainty should be dealt and for this, Weibull Distribution is adopted and then probabilistic optimal power flow (OPF) problem is formulated in this paper. The simulation results of the case study present how the uncertainty of wind power affects power flow.
Probabilistic Optimal Power Flow Analysis with Undetermined Loads
Jo, Byuk-Keun,Han, Jong-Hoon,Guo, Qinglei,Jang, Gil-Soo The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.3
The load in power system usually can be fluctuated, sometimes awfully, due to sudden disturbance, measuring and forecasting error, or even its inherent nature. Therefore, the conventional deterministic generation dispatch problems are not enough to operate power system. To deal with such uncertainties, Gaussian distribution is adopted and then probabilistic optimal power flow (OPF) problem is formulated in this paper. Some case studies are presented for the simulation assumed that load is not deterministic anymore. The results of the case studies present how the undetermined loads affect generation cost.