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2019년도 2학기 신라대학교 재학생의 부산인식 설문조사 분석 : 인문사회계 학생을 대상으로
김대래, 신군재, 유영명, 장희정, 정쾌영 신라대학교 부산학연구센터 2016 부산연구 Vol.17 No.2
이 논문은 신라대학교에 재학 중인 학생들을 대상으로 부산에 대한 인식을 알아보기 위해 수행 한 설문지에 대한 분정확히 알아보기 위하여 분석에서는 부산출신자를 대상으로 하였다. 학생들과 부모의 출생연도와 연령 등에 관한 기초분석을 하고 부산의 자랑과 특성에 관한 인식을 분석 하였다. 아울러 학생들의 일석이다. 총 237부의 응답지를 받았는데 그 중에서 부산출생자 153명 을 대상으로 분석을 하였다. 부산에 관한 인식을 좀 더 상생활과 관련된 설문을 분석하였다. 분석에는 spss24를 이용하여 빈도분석과 기술통계분석 그리고 교차분석을 하였다.
再生骨材 콘크리트의 特性에 미치는 잔골재 混合의 影響에 關한 實驗的 硏究
李正熙,宋河永,文鐘健,趙明元 大田産業大學校 1997 한밭대학교 논문집 Vol.14 No.1
It is becoming increasing1y difficult and expensive for construction contractors not only to dispose of building waste and demolition rubble but also to obtain natural aggregates of good quality for concrete product and building construction. As one of solutions for the above-mentioned problems, this study was planned to suggest a fundamental data and method for producing recycled aggregate concrete using crushed cement bricks as fine aggregates. In this study, one normal concrete with natural river sand as fine aggregate and crushed stone as coarse aggregate and three recycled aggregate concretes according to the mix proportion of recycled fine aggregate substitution ratio of 35%, 65%, 100% were made using tile water-cement ratio of 45% and 65%.
Non-destructive Screening of Genetically Modified Soybean Using Near Infrared Spectroscopy
Myoung-Gun Choung,Young-Sun Hwang,Hyeon-Jin Lee,Su-San-Na Choi,Su-Jin Lee,Sung-Taeg Kang,Won-Young Han,In-Youl Baek,Keum-Yong Park 한국작물학회 2008 한국작물학회 학술발표대회 논문집 Vol.2008 No.10
NIR spectroscopy combined with multivariate analysis after the appropriate spectral data pre-treatment has been proved to be a very powerful tool for judgment of the relative pattern of the objects that have very similar properties. In this study, 500 GMO soybean seeds and, 500 non-GMO ones were measured in NIR reflectance mode. Principal component analysis (PCA), and discriminant analysis (DA) were applied to classify soybean with different genes into two groups (GMO and non-GMO). Calibrations were developed using DA regression with the cross-validation technique. The results show that differences between GMO and non-GMO soybeans do exist and excellent classification can be obtained after optimizing spectral pre-treatment. The raw spectra with DA model after the second derivative pre-treatment had the best satisfactory calibration and prediction abilities, with 97% accuracy. The results in the present study show NIR spectroscopy together with chemometrics techniques could be used to differentiate GMO soybean, which offers the benefit of avoiding time-consuming, costly and laborious chemical and sensory analysis.
Myoung Gun Choung,Si Young Lee,Hannah Lee,Eun Ji Go,Chang Yeon Yu,Jung Dae Lim 한국약용작물학회 2017 한국약용작물학술대회 발표집 Vol.2017 No.05
Backgrounds : Camellia sinensis is known to have a very high antioxidant activity, but its petals are small and it is difficult to use it because of its low yield. In comparison Camellia japonica has many petals and yield, however, the biological effects of C. japonica have been less frequently studied. In the present study, we focused on investigating the in vitro antioxidant effect of the ethanol extract from flower of C. sinensis (CSF), C. japonica (CJF) and mixture of CSF and CJF. Methods and Results : Content of total phenolics and total flavonid, DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activities, reducing power, superoxide anion and hydroxy radical scavenging activity of CSF and CJF were compared in vitro experimetal models. Total phenolics was contained the higer in CJF (172.19±1.65 mgCAE/gEX) than 146.75±0.15 mgCAE/gEX in CSF. And effects of antioxidant measured by reducing power, superoxide anion generated by xanthine/xanthine oxidase and hydroxyl radical generated by the Fenton reaction (FeSO4 + H2O2) in a cell-free system was shown higher in mixture of CSF and CJF than BHT, ascorbic acid as a chemical oxidant which was detected by electron spin resonance spectrometry coupled with DMPO spin trapping. These results suggest that Camellia flower extract such as CSF and CJF exhibits antioxidant properties by scavenging ROS. Camellia extract contained quercetin, quercetin-3-O-glucoside, quercitrin and kaempferol, which are antioxidant compounds. Conclusion : As a result, the combination of CSF and CJF showed higher antioxidative effect than using CSF or CJF alone.
( Myoung Gun Choung ) 한국응용생명화학회 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.4
This study was to investigate near-infrared reflectance spectroscopy (NIRS) application for determination of individual soluble carbohydrate content in soybean seeds for development of high-quality new soybean variety and quality control of soy products. NIRS was used as a rapid and simultaneous analysis method to determine individual soluble carbohydrate content of soybean seeds in Korea. A total of 240 samples (about 2 g) were scanned in the reflectance mode and the reference values for the individual soluble carbohydrate contents were measured by high performance liquid chromatography. Calibration equation for individual soluble carbohydrate contents were developed using modified partial least-squares regression with internal cross validation (n=155). The equation for sucrose content had lower standard error of cross-validation, higher R2 (coefficient of determination in calibration), and higher ratio of unexplained variance divided by variance (1-VR) value than that for raffinose, and stachyose. Prediction of an external validation set (n=85) showed significant correlation between reference value and NIRS estimated value based on the standard error of prediction (SEP), r2 (coefficient of determination in prediction), and the ratio of standard deviation (SD) of reference data to SEP. The model for sucrose had higher value of RSP (ratio of standard deviation for prediction, the ratio of SD of reference data to SEP(C) in the external validation set) and r2 (3.50 and 0.921, respectively), thereby that equation has good quantitative accuracy, whereas those of raffinose, and stachyose had lower value (below 0.89 and 0.45, respectively). These results indicated that NIRS could be used to rapidly determine the content of sucrose in soybean seed samples in the breeding programs for development of high-quality new soybean variety.
Myoung Gun Choung,Hannah Lee,Si Young Lee,Su Jin Yang,Seon Kang Choi,Chang Yeon Yu,Jung Dae Lim 한국약용작물학회 2016 한국약용작물학술대회 발표집 Vol.2016 No.10
Background : Lutein, a xanthophyll, consists of chains with 8 conjugated double bounds containing closed rings on each end of the chain. This carotenoid is found in fruits and vegetables, especially dark green leafy vegetables such as green tea. In this study, we investigated the anticancer effects of purified lutein from green tea on human cancer cell lines containing prostate carcinoma cancer cells (LNCaP). Methods and Results : Prostate carcinoma cancer cells (LNCaP) were cultured and evaluated the inhibitory effect of lutein isolated from green tea compared other carotenoids (β-carotene and lycopene) on cell proliferation. Cyclin D1 and PCNA were evaluated as cell differentiation. In results, PCNA/cyclin regulates the initiation of cell proliferation by mediating DNA polymerase. Under cultural conditions, lycopene remarkably suppressed the PCNA expression prostate cancer cell line LNCaP in higher doses (20 μM - 100 μM) statistically. However, β-carotene and lutein presented the less inhibitory effects on PCNA expression. Determination of PCNA expression in control and treated cells demonstrates that lycopene did affect proliferation in LNCaP cancer cells in dose-dependent manner. However, β-carotene and lutein suppressed the cyclin D1 expression in dose-dependent manner but no in lycopene group. These results indicate that differ carotenoids presented the various suppressive ability of PCNA and cyclin D1 expression in cell proliferation. Conclusion : In conclusion, lutein suppressed the carcinogenesis of induced prostate cancer cell line by acting as a suppressor for inhibiting the expression of cyclin D.
Myoung Gun Choung 한국응용생명화학회 2010 Journal of Applied Biological Chemistry (J. Appl. Vol.53 No.4
This study was to investigate near-infrared reflectance spectroscopy (NIRS) application for determination of individual soluble carbohydrate content in soybean seeds for development of high-quality new soybean variety and quality control of soy products. N
An Improved Back-EMF based Initial Rotor Position Estimation for IPMSM
Gun-Myoung Kim,Byoung-Gun Park,In-Soung Jung,Dong-Seok Hyun 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper proposes a simple initial rotor position estimation method to improve the starting performance for back EMF-based sensorless control. The proposed estimation is achieved at standstill by using the relative magnitudes of the current which is in inverse proportion to the variation of the inductance of stator winding due to saliency of the rotor. This initial rotor position estimation method is easy to be implemented with back EMF-based sensorless control and can help to successfully startup without start failures or reverse rotating and makes the estimation procedure quicker and easier than other conventional method using saturation of the current by the inductance, and doesn’t require any other external devices and is not affrected by motor parameters. The validity of the proposed initial rotor position estimation is demonstrated by experiment.