http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jeong, Jiyoon,Kwun, Yoojin,Kim, Min-ju,Choi, Sang-Ho,Jung, Euiseok,Lee, Byong Sop,Kim, Ki-Soo,Kim, Ellen Ai-Rhan The Korean Society of Neonatology 2021 Neonatal medicine Vol.28 No.3
Purpose: The aim of this study was to estimate the effect of targeting risk factors for the control of central line-associated bloodstream infection (CLABSI) among high-risk infants in a tertiary neonatal intensive care unit (NICU). Methods: Infants admitted to the NICU and diagnosed with CLABSI from January to December 2013 were eligible for inclusion to the study. The CLABSI group (n=47) was matched in a 1:2 ratio to the control group (n=94) based on gestational age, birth weight, and Score for Neonatal Acute Physiology-II. Risk factors for CLABSI were identified using the Cox proportional hazard model, and analysis of the effect of these risk factors targeting infection control was performed. Results: The risk factors associated with CLABSI were prolonged central line dwell days (adjusted hazard ratio [HR], 1.028; 95% confidence interval [CI], 1.011 to 1.045; P=0.001), use of a silicone catheter (adjusted HR, 5.895; 95% CI, 1.893 to 18.355; P=0.002), surgical treatment (adjusted HR, 3.793; 95% CI, 1.467 to 9.805; P=0.006), and less probiotic supplementation (adjusted HR, 0.254; 95% CI, 0.068 to 0.949; P=0.042). By targeting these risk factors with a quality improvement initiative, the mean CLABSI incidence rate per 1,000 catheter-days decreased from 6.6 to 3.1 (P=0.004). Conclusion: Targeting risk factors for infection control significantly reduced the rate of CLABSI among high-risk infants in the NICU.
Balancing energy use against video quality in mobile devices
Euiseok Kim,Hyunmi Jeong,Jinwoo Yang,Minseok Song IEEE 2014 IEEE transactions on consumer electronics Vol.60 No.3
<P>It is now common to access mobile video services through various Internet-connectable devices such as game stations, smartphones and tablets. This paper proposes a new energy management scheme for mobile devices by making use of the temporal scalability available in scalable video coding (SVC) techniques. The proposed scheme determines a quality index for each video segment, based on the pixel-wise difference between the luminance planes of consecutive frames at each frame-rate, and predicts the computation needed to decode each frame using data relating frame sizes to previous decoding times. A new dynamic voltage and frequency scaling (DVFS) scheme is then invoked to achieve the specified quality index. The proposed scheme was implemented on a smartphone and a user test was conducted to assess the acceptability of different degree of frame-rate reduction. Real measurements showed that the proposed scheme uses between 5% and 41% less energy than the Linux DVFS governor used in many smartphones, while maintaining acceptable video quality.</P>
김의석(Euiseok Kim),이정근(Jeong-Gun Lee),이동익(Dong-Ik Lee) 한국정보과학회 2000 정보과학회논문지 : 시스템 및 이론 Vol.27 No.6
본 논문에서는 유한페트리넷의 도달가능성에 대한 효율적인 분석방법을 제안한다. 일반적으로 도달가능성 분석은 유한페트리넷의 동적 성질에 관한 연구에 있어서 가장 근본이 되는 분석중의 하나이다. 그러나 일반적인 유한페트리넷의 경우, 도달가능성 분석은 분석시간과 요구되는 메모리 양의 측면에서 지수승의 복잡도를 요구하게 되며 많은 경우 상태공간폭발 문제를 야기할 수 있다. 이에 본 논문에서는 유한페트리넷의 분석을 위한 중간모델인 언폴딩(unfolding)상에서 장소(place)간의 구조관계 분석을 통하여 시간 및 메모리의 측면에서 효율적으로 도달가능성 분석을 수행하는 방법을 제안한다. 제안된 방법은 구조적 제약 없이 모든 종류의 유한페트리넷에 적용 가능하다. This paper suggests an efficient reachability analysis method of bounded petri nets. Reachability analysis is a fundamental basis for studying the dynamic properties of any discrete event systems. However, it takes at least exponential execution time and memory space to verify in general petri nets. That is, state space explosion problem may occur. In this paper, we attack problems of previous approaches - state space explosion and restrictions to applicable petri net classes - by formulating the reachability problem as set operation over structural relations among places on an unfolding.
프로세스 중심방식에 기반한 비동기식 유한상태기의 자동생성을 통한 분산 비동기식 제어부의 유도
김의석(Euiseok Kim),이정근(Jeong-Gun Lee),이동익(Dong-Ik Lee) 한국정보과학회 2001 정보과학회논문지 : 시스템 및 이론 Vol.28 No.7·8
본 논문에서는 비동기식 상위수준합성기 제작의 일환으로 효율적인 비동기식 제어부의 자동생성에 관한 방법을 제안한다. 제안된 방법은 목적시스템의 사양으로써 주어진 제어데이타흐름그래프로부터 일련의 체계적인 변환과정을 통하여, 제어부를 구성할 제어회로들에 대응하는 계층적으로 분할된 비동기식 유한상태기들의 집합을 유도한다. 유도된 비동기식 유한상태기들은 현존하는 비동기식 제어회로 합성기를 통하여 해저드 없는 비동기식 제어회로들로 합성되며, 이들은 상호간에 4단계 핸드셰이킹에 기반한 신호교환을 통하여 동작하면서 전체 시스템을 제어하는 계층적으로 분할된 비동기식 제어부를 구성한다. 획득한 제어부는 계층 · 분산적이며, 면적, 성능 및 합성시간의 측면에서 기존방식을 통하여 생성한 제어부에 비해 우월하다. In this paper, we suggest a new method to build an asynchronous control unit automatically as a part of an asynchronous high-level synthesis procedure. In this method, a set of hierarchically decomposed asynchronous finite state machines(AFSMs) are derived from a control/data flow graph(CDFG) through a systematic procedure. Through an asynchronous logic synthesis tool, those derived AFSMs are synthesized into asynchronous controllers, which communicate with each other through 4-phase handshaking protocol and compose an asynchronous control unit. The suggested method produces superior asynchronous control units in the aspects of area, performance, implementability and synthesis time compared to previous methods.
( Sang-hee Jeong ),( Mi-young Lee ),( Ok-ju Kang ),( Rina Kim ),( Jin-hoon Chung ),( Hye-sung Won ),( Pil-ryang Lee ),( Euiseok Jung ),( Byong Sop Lee ),( Woo-jong Choi ),( Yoon Se Lee ) 대한산부인과학회 2021 Obstetrics & Gynecology Science Vol.64 No.1
Objective To report our experience with management of fetuses with congenital high airway obstruction syndrome (CHAOS). Methods We retrospectively reviewed the cases of fetuses who were prenatally diagnosed and postnatally confirmed with CHAOS between 2010 and 2019 at Asan Medical Center, Seoul, Korea. Results Of 13 fetuses prenatally diagnosed with CHAOS, 7 were lost to follow-up and 6 were postnatally confirmed as having CHAOS. All fetuses, except one were delivered via cesarean section with an ex utero intrapartum treatment (EXIT) procedure. Two patients had coexisting congenital heart diseases requiring several cardiac surgeries following birth. Both of these patients demonstrated developmental delay; however, the remaining 4 had a normal development except for expressive language. Two infants died of respiratory complications, and the remaining 4 were alive at the end of the follow-up period. All 4 live patients underwent tracheostomy with planned reconstruction surgery. Three children are now able to phonate, and 1 can maintain a conservation. Conclusion The proper management of CHAOS using the EXIT procedure results in high survival and low hypoxemia-induced complication rates. Therefore, an accurate prenatal diagnosis is necessary for an appropriate perinatal management.
SLEDS : 비동기 마이크로프로세서를 위한 상위 수준 사건구동식 시뮬레이터
최상익(Sangik Choi),이정근(Jeong-Gun Lee),김의석(Euiseok Kim),이동익(Dong-Ik Lee) 한국정보과학회 2002 정보과학회논문지 : 시스템 및 이론 Vol.29 No.1·2
VHDL이나 Verilog와 같은 기존의 하드웨어 기술 언어(Hardware Description Language)를 이용하여 비동기 마이크로프로세서를 모델링하고 시뮬레이션을 수행할 수 있으나, 핸드셰이크 프로토콜 (handshake protocol)에 의해 동작하는 비동기 마이크로프로세서의 기술이 지나치게 복잡해진다. 결과적으로, 성능 평가 시간이 너무 길어져 상위 수준(system level)에서의 효과적인 설계 공간 탐색에 많은 어려움을 겪는다. 따라서, 상위 수준에서 비동기적 특성인 핸드셰이크 프로토콜을 쉽게 모델링하고, 빠른 시간내에 효과적으로 시뮬레이션할 수 있는 방법론과 도구가 필요하다. 이런 목적 하에, 프로세서 모델링과 시뮬레이션을 통하여 성능 평가를 수행할 수 있는 자동화 도구 SLEDS(System-Level Event-Driven Simulator)를 개발하였다. 본 도구의 궁극적 목표는 프로세서를 구성하는 모듈들의 지연을 조절하여(delay balancing) 전체적으로 프로세서가 고성능을 얻을 수 있도록 최적화 조건을 구하는 것이다. 이와 더불어, 정의된 행위를 실제로 수행함으로써, 예상한 결과와 실제 결과를 비교하여, 설계가 제대로 되었는지 상위 수준에서의 검증을 목표로 한다. It is possible but not efficient to model and simulate asynchronous microprocessors with the existing HDLs(Hardware Description Languages) such as VHDL or Verilog. The reason is that the description becomes too complex, and also the simulation time becomes too long to explore the design space. Therefore, it is necessary to establish a methodology and develop a tool for modeling the handshake protocol of asynchronous microprocessors very easily and simulating it very fast. Under this objective, an efficient CAD(Computer-Aided Design) tool, SLEDS(System-Level Event-Driven Simulator), was developed which can evaluate performance of a processor through modeling with a simple description and simulating with event-driven engine in the system level. The ultimate goal in the tool SLEDS is to find the optimal conditions for a system to produce high performance by balancing the delay of each module in the system. Besides, SLEDS aims at verifying the design through comparing the expected results with the actual ones by performing the defined behavior.