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EIA-709.1 Control Network Protocol을 이용한 필드버스 시스템 구현
최병욱,김정섭,이창희,김종배,임계영 제어·자동화·시스템공학회 2000 제어·자동화·시스템공학논문지 Vol.6 No.-
EIA-709.1 Control Network Protocol is the basic protocol of LonWorks systems that is emerging as a fieldbus device. In this paper, the protocol is implemented by using VHDL with FPGA and C program on an Intel 8051 processor. The protocol from the physical layer to the network layer of EIA-709.1 is implemented in a hardware leval. So it decreases the load of the CPU for implementing the protocol. We verify the commercial feasibility of the hardware through the communication test with Neuron Chip, based on EIA-709.1 protocol, which is used in industrial fields. The developed protocol based on FPGA becomes one of IP and we are able to implement SOC for the terminal device in the distributed control systems. Also, the result can be applicable to various industrial field because it is implemented by VHDL.
Lee, Doo Hwan,Jeong, Myung Ho,Rhee, Jung Ae,Choi, Jin Su,Lee, Ki Hong,Lee, Min Goo,Sim, Doo Sun,Park, Keun-Ho,Yoon, Nam Sik,Yoon, Hyun Ju,Kim, Kye Hun,Park, Hyung Wook,Hong, Young Joon,Kim, Ju Han,Ahn The Korean Society of Cardiology 2012 Korean Circulation Journal Vol.42 No.10
<P><B>Background and Objectives</B></P><P>Predictive factors of mortality in acute coronary syndrome (ACS) patients with left ventricular dysfunction were analyzed during 5-year clinical follow-up after percutaneous coronary intervention (PCI).</P><P><B>Subjects and Methods</B></P><P>A total of 329 ACS consecutive patients (64.6±11.3 years, 227 males) who underwent PCI from January 2001 to March 2006 were followed for 5 years. All patients had lower than 40% of left ventricular ejection fraction (LVEF). Patients were divided into Group I (survived longer than 5-years: n=130, 101 males) and Group II (survived shorter than 5 years: n=199, 126 males).</P><P><B>Results</B></P><P>The cumulative survival rate was 88.0% at 1 month, 78.0% at 6 months, 75.0% at 1 year, 67.0% at 2 years, 62.0% at 3 years, 57.0% at 4 years and 40% at 5-years. Group II was older (61.6±11.2 years vs. 66.4±11.4 years, p<0.001), and showed higher prevalence of female gender (28.4% vs. 36.7%, p=0.006) and lower LVEF (35.3±5.2 vs. 33.6±5.6) than Group I. The independent predictors for mortality were LVEF <30% {odds ratio (OR)=1.793, 95% confidence interval (CI): 1.234-2.452, p=0.002}, serum creatinine >3.0 mg/dL (OR=2.455, 95% CI: 1.306-4.614, p=0.005), older than 65 years (OR=1.594, 95% CI: 1.152-2.206, p=0.005), and female gender (OR=1.524, 95% CI: 1.090-2.130, p=0.014).</P><P><B>Conclusion</B></P><P>Five-year survival rate was 40% in ACS patients with left ventricular dysfunction, and the predictors for mortality were low LVEF, high serum creatinine, old age, and female gender.</P>
Lee, Eung Jun,Won, Wook Kyoung,Lee, Byoungki,Kye, Youn Hee,Lee, Ik Mo Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.9
Polynorbornenes prepared by vinyl addition pathway are known to have some desirable characteristics for wider application but they have some critical drawbacks such as brittleness, poor solubility and adhesion. In order to improve these drawbacks, extensive research for the successful homo- and copolymerization of polar functionalized norbornene with olefin has been carried out. Even though considerable advance has been achieved in the polymerization of polar functionalized monomers, successful catalytic systems for the homopolymerization of polar functionalized norbornene are rare. In this study, a novel successful catalytic system for the polymerization of polar functionalized norborene is proposed. This system employs Pd ${\beta}$-diketiminate/borate cocatalyst in water/organic mixed solvents and it is unique due to introduction of water as a component of solvents. Polymers obtained in this study show high Mw with narrow PDI. Effects of several reaction parameters to the polymer activity and properties are investigated and optimal catalytic system are proposed.
이욱현(Wook-Hyun Lee),이기우(Ki-Woo Lee),이영수(Young-Soo Lee),전원표(Won-Pyo Jeon),박기호(Ki-Ho Park),이계중(Kye-Jung Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In this study, we have manufactured the flat plate heat pipe with different square modules ; different hight(10㎜, 5㎜) and width(30㎜, 20㎜), and investigated the operating characteristics of flat plate heat pipe experimentally. Water was used as a working fluid. Fill charge ratio and heat flux was changed(10-40 vol.%, 10-45W). Surface temperature, inner saturated temperature and pressure were measured. Experiment was conducted in condition of nature convection and thermal resistance was showed as representative index for heat transfer performance. Optimal module type was selected and minimum surface temperature difference ranged 0.3~1.1℃ when average surface temperature ranged 70~150℃