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최성모 한국복합신소재구조학회 2013 복합신소재구조학회논문집 Vol.4 No.2
This project is mainly related to evaluation of total energy consumption of low energy house, the exterior envelope of which was wholly composed of structural insulated panels(SIP). The U-value of applied SIP was in the range of 0.189 to 0.269W/㎡․K and the U-value of pair glass from 0.78 to 1.298W/㎡․K was applied for window dependent to its function respectively. For comparison of total energy performance, the energy simulation for pilot house was performed to compare with the control house having insulation criteria of Korean building regulation in 2009. Based on simulation of dynamic energy performance, the pilot house saved 48.3% of annual energy consumption while the control house in 2009 consumed as 85.7GJ/y. In case of heating, the result showed that the energy saving ratio amounted to 76.7%. For CO₂ emission, the pilot house diminished approximately 35.4% from 6,208.4kgCO₂ to 4,009.2kgCO₂. In payback period to early investment, it was analyzed the pilot house took 7.8 years, when the low energy house built by other insulation method with same thermal perfusion took 11.5 years. From this result, it is considered that the SIP is more effective, economic to Green Home application.
ST 비상승 급성 관상동맥 증후군 환자에서 고 위험군 추정 및 조기 사망에 대한 예측인자로서 D-dimer의 유용성
최성모,나준호,이기호,이경룡,홍대영,백광제,박상민,박상오 대한응급의학회 2014 大韓應急醫學會誌 Vol.25 No.6
Purpose: The aim of the study is to evaluate the efficacy ofinitial plasma D-dimer levels measured in the emergencydepartment (ED) in prediction of early 28-day mortality andhigh-risk patients for early invasive treatment in patients withNon-ST elevation acute coronary syndrome (NST-ACS). Methods: This is a retrospective clinical study of NST-ACSpatients in the ED. All patients were managed according tothe 2010 ACLS guidelines. EKG, cardiac markers, and Ddimerwere analyzed. All data were collected via electronicmedical records. The two major endpoints were 28-daymortality and high-risk patients who were defined as caseswith one of the following: refractory ischemic chest discomfort,recurrent/persistent ST deviation, ventricular tachycardia,hemodynamic instability, and signs of heart failure. Weassessed the relationship between initial D-dimer levels,and high-risk patients, and 28-day mortality. Results: A total of 390 patients were analyzed. There were25 high-risk patients (6.41%) and 10 non-survival cases(2.56%). The median (inter-quartile ranges) D-dimer valuewas higher in high-risk patients than in non-high riskpatients (1.36 [0.57 to 2.30] vs. 0.31 [0.23 to 0.53] ug/dL;p<0.0001). Area under curve (AUC) in Receiver-operatorycharacteristic (ROC) curve for D-dimer in high-risk patientswas 0.834 (95% confidence interval: 0.750-0.920) with theoptimum cutoff value of 0.475ug/dL with a sensitivity of 84%and a specificity of 71%. The median value of D-dimer innon-survival cases was higher than in survival cases (1.17[0.84 to 18.46] vs. 0.33 [0.23 to 0.56] ug/dL; p<0.0001). AUC for D-dimer in predicting 28-day mortality was 0.837(95% CI: 0.710-0.964) with the optimum cutoff value of 0.98ug/dL with a sensitivity of 80.0% and a specificity of 86.3%. Conclusion: The D-dimer level in the initial state might behelpful in predicting high-risk patients for early invasive treatmentor 28-day mortality in patients with NST-ACS in the ED.
Structural Behavior of Tension Joint with High-Strength Bolted Split-Tee
최성모,이성희,김진호 한국강구조학회 2009 International Journal of Steel Structures Vol.9 No.2
The strength and behavior of split-tee connections that are applicable to all tensile connections with high-strength bolts have been studied in many countries. The design code of each country (AISC, Eurocode 3) does not consider various field conditions, however, such as the painting of the connection surface, the length of the bolt shank, and the preload. Moreover, the previous studies (Bahaari) that used the link element on the preload of the bolt could not predict the correct behavior of high-strength bolts. In this study, to evaluate the tensile capability of split-tee connections, a total of 20 split-tee specimens with two bolts each were fabricated and tested. The experiment parameters that were used were the thickness of the T-flanges, painting, preload, and the length of the bolt shank. The joint stiffness of split-tee connections was compared with the stiffness equation of Faella et al., and finite-element method analysis with Ansys 8.0 was conducted. Further, to verify the reliability of the highstrength- bolt model, the load-to-bolt stress relation in the experiment test and the analysis results were compared. The strength and behavior of split-tee connections that are applicable to all tensile connections with high-strength bolts have been studied in many countries. The design code of each country (AISC, Eurocode 3) does not consider various field conditions, however, such as the painting of the connection surface, the length of the bolt shank, and the preload. Moreover, the previous studies (Bahaari) that used the link element on the preload of the bolt could not predict the correct behavior of high-strength bolts. In this study, to evaluate the tensile capability of split-tee connections, a total of 20 split-tee specimens with two bolts each were fabricated and tested. The experiment parameters that were used were the thickness of the T-flanges, painting, preload, and the length of the bolt shank. The joint stiffness of split-tee connections was compared with the stiffness equation of Faella et al., and finite-element method analysis with Ansys 8.0 was conducted. Further, to verify the reliability of the highstrength- bolt model, the load-to-bolt stress relation in the experiment test and the analysis results were compared.
사물탕(四物湯)과 사군자탕(四君子湯)의 전탕(煎湯)방법의 차이에 관한 GC 분석 실험
최성모,Choi, Sung-Mo 대한동의생리학회 2006 동의생리병리학회지 Vol.20 No.6
The GC pictures were taken to investigate the difference of the Samul-tang and Sakunja-tang, each prepared by the different boiling methods, which were the traditional method(using cover), using the condenser, and using no cover. For Samul-tang, there was not much difference in the GC pictures, but the one pick(rt about 7 min.) of the picture by the method using the condenser had the higher intensity than those in the pictures by other methods. For Sakunja-tang, the GC pictures of the method using the condenser had shown a lot of the peaks and the very high intensity, which were much better than those of the picture by the traditional method. However, the GC pictures of the method by using no cover had shown almost nothing.
최성모,이호춘 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
It is highly demanded to increase Ni content in LiNiXCoYMnZO<sub>2</sub> (NCM) cathode materials to maximize the energy density of Li-ion Batteries (LIBs). However, high Ni-content NCM suffers from poor thermal stability. In this study, we demonstrate that the metal (Ni, Co, Mn) dissolution behaviors of various Al<sub>2</sub>O<sub>3</sub>-coated NCM 622 powders are greatly related to their acid and total surface free energy (SFE). The amounts of Ni, Co and Mn ion dissolved from the NCM powders during 60°C storage are measured by the atomic absorption spectroscopy(AAS). Then, their SFE components are analyzed by the adsorption method with three probe liquids. Strong linear correlation is observed between the metal dissolution and the surface free energy (SFE).