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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%.
ESR 및 In Vitro Assay를 이용한 녹차 아세톤 추출물과 이로부터 분리된 루테인의 항산화 활성
Myoung Gun Choung,Si Young Lee,Hannah Lee,Su Jin Yang,Seon Kang Choi,Chang Yeon Yu,Jung Dae Lim 한국약용작물학회 2016 한국약용작물학술대회 발표집 Vol.2016 No.10
Background : Plants are the rich source of antioxidants, which plays a very important role in maintaining human health. Their antioxidant property protects cells of different organs of human beings against free radicals and free radical mediated diseases. Even though, there is lack of knowledge on the antioxidant effect of lutein present in plants. In the present study, lutein was isolated from the GreenTea leaves (Camellia sinensis) which is used as a dietary source. Methods and Results : The procedure adopted for the isolation and purification of lutein using acetone extraction and preparative high performance liquid chromatography (HPLC) is simple and less time consuming. Free radicals scavenging activity of isolated lutein from acetone extract of GreenTea was assessed by DPPH radical scavenging assay and reducing power. The isolated lutein scavenged 79% of DPPH radicals at 20 ㎍/㎖ and two fold lower concentration compared to the standard antioxidants (α-tocopherol). No significant differences were found between the reducing power of the lutein and BHT when their concentrations were high. However, significant differences were observed at relatively low concentrations, the reducing power of lutein was isolated from the GreenTea leaves was stronger than those of their acetone extract and standard antioxidants (BHA). Both electron spin resonance (ESR) and in vitro assay confirmed that lutein was isolated from the GreenTea leaves, exhibited a greater capacity for scavenging superoxide (O2 •-) and hydroxyl (OH •) radicals than standard antioxidants β-carotene and α-tocopherol respectively. Conclusion : The results proven that lutein isolated from GreenTea leaves has an efficient antioxidant ability, it could serve as an antioxidant to scavenge reactive oxygen species.
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.
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.
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
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.