There is much observational evidence that active star formation is taking place in the Hii regions Sh 2-255 – 257. We present a photometric study of this star forming region (SFR) using imaging data obtained in passbands from the optical to the mid-infrared, in order to study the star formation process. A total of 218 members were identified using various selection criteria based on their observational properties. The SFR is reddened by at least E(B −V ) = 0.8 mag, and the reddening law toward the region is normal (RV = 3.1). From the zero-age main sequence fitting method it is confirmed that the SFR is 2.1 ± 0.3 kpc from the Sun. The median age of the identified members is estimated to be about 1.3 Myr from a comparison of the Hertzsprung-Russell diagram (HRD) with stellar evolutionary models. The initial mass function (IMF) is derived from the HRD and the near-infrared (J, J −H) color-magnitude diagram. The slope of the IMF is about 􀀀 = −1.6 ± 0.1, which is slightly steeper than that of the Salpeter/Kroupa IMF. It implies that low-mass star formation is dominant in the SFR. The sum of the masses of all the identified members provides the lower limit of the cluster mass (169M⊙). We also analyzed the spectral energy distribution (SED) of pre-main sequence stars using the SED fitting tool of Robitaille et al., and confirm that there is a significant discrepancy between stellar mass and age obtained from two different methods based on the SED fitting tool and the HRD.

Star clusters are superb astrophysical laboratories containing cospatial and coeval samples of stars with similar chemical composition. We initiate the Sejong Open cluster Survey (SOS) - a project dedicated to providing homogeneous photometry of a large number of open clusters in the SAAO Johnson-Cousins’ UBV I system. To achieve our main goal, we pay much attention to the observation of standard stars in order to reproduce the SAAO standard system. Many of our targets are relatively small sparse clusters that escaped previous observations. As clusters are considered building blocks of the Galactic disk, their physical properties such as the initial mass function, the pattern of mass segregation, etc. give valuable information on the formation and evolution of the Galactic disk. The spatial distribution of young open clusters will be used to revise the local spiral arm structure of the Galaxy. In addition, the homogeneous data can also be used to test stellar evolutionary theory, especially concerning rare massive stars. In this paper we present the target selection criteria, the observational strategy for accurate photometry, and the adopted calibrations for data analysis such as color-color relations, zero-age main sequence relations, Sp - MV relations, Sp - Teff relations, Sp - color relations, and Teff - BC relations. Finally we provide some data analysis such as the determination of the reddening law, the membership selection criteria, and distance determination.

Ready-to-eats fresh cut-vegetables that may be consumed without further cooking or reheating can be grouped as potentially high risk foods. The foodborne disease outbreaks associated with consumption of the fresh cut-vegetables have been related with the contamination of Listeria monocytogenes. The food survey and consumption data sets for fresh cut-vegetables and also the published dose-response models for L. monocytogenes, was used to estimate the risk of L. monocytogenes for fresh cut-vegetables in Korea. Also, the simulation model and formulas with Microsoft@ Excel spreadsheet program using these data sets and chose dose-response model was developed. The mean case of listeriosis by consumption of the fresh cut-vegetables per 10 million per year was estimated as 3.23 × 10-6. Results suggest that additional studies were needed to allow for a more realistic and accurate microbial risk assessment (MRA) in the future.

Toxicological safety on 20 kGy-gamma irradiated Kanjang (soy sauce), Doenjang (soybean paste), Kochujang (hot pepper paste) and Chungkukjang (soy paste) was determined by SOS Chromotest. As the strain of the SOS Chromotest, Escherichia coli PQ37 was used in the condition of presence or absence of an exogenous metabolizing system (S-9 mix). Water extract or organic solvent extract was prepared from samples, concentrated and tested by SOS Chromotest with S-9 mix or not. All irradiated samples were not different from non-irradiated one in the bacterial assay maintaining the below 1.5 of IF(induction factor) values in the adapted dose of 10,000 ㎍/assay. The results indicated that any mutagenicity was not observed in 20 kGy-irradiated traditional soybean fermented foods.

본 연구에서는 해외에서 이루어진 한국학의 업적을 오늘날의 관점에 서 비판하고, 한국학의 범위 확대와 질적 수준을 발전시키는 방안을 연구사적 검토를 통해서 모색하고자 했다. 여기서는 윌리엄 스킬렌드 의 『고대소설』에 수용된 연구사로서의 고소설 담론 및 그의 학문적 성과와 연구사적 의의를 검토하고, 국내외 관련 저작물에 나타난 고대 소설의 파급 효과와 학술적 공헌을 살펴보았다. 고대소설에서는 서론에서 언급한 실증적 방법론이 본론에 와서는 고소설 문헌자료의 분석에 엄격하게 적용되지 않았다는 문제점도 있었 다. 이러한 오류를 범한 주된 이유는 아시아소설에 대한 그의 잘못된 인식에서 비롯되었다. 역사적 문헌기록을 배제한 채 이루어진 스킬렌 드의 실증적 문헌연구가 영국소설에 기반한 그의 관념과 오리엔탈리즘에 의해 진행되었기 때문이다. 그러나 한편에서는 윌리엄 스킬렌드가 소개한 근대적 문헌연구방법 은 한국 문헌학의 발전에 중요한 공헌을 했다고 간주된다. 뿐만 아니라 고소설 문헌의 계보를 추적하는 가운데 언급된 국내외 소설담론의 존 재를 알려주기도 했다. 또한 『고대소설』은 원본 자료에 대한 실증적 연구의 중요성을 제시하여 한국 고소설사의 문제점을 환기시킨 점에서 도 크게 기여했다. 또한 대외적으로는 중국소설을 번역한 작품 또는 중국소설의 번안 작품의 존재를 다루고, 한국 고소설의 해외 번역 상황 까지 소개했다는 점에서 윌리엄 스킬렌드의 『고대소설』은 한국학의 세계화라는 측면에서 주목할 만한 큰 성과로 평가된다.