We present results of a test-study of the large-scale survey using the multi-beam receiver system recently installed on the 14 m telescope at Taeduk Radio Astronomy Observatory (TRAO). We have tested several modes of mapping, and found suitable (time-saving) mapping parameters of 'ON-SOURCE' = 8, 'OFF-SOURCE' = 1 when using 'RPT' = 3 as a position-switching mode. We observed 504 spectra towards the NGC 7538, a star forming molecular cloud in the transition of J = 1 - 0 of 12CO . From the Outer Galaxy Survey database (Heyer et al., 1998) we obtained 504 spectra for the same region. We compared integrated intensities, line profiles of two databases, and found that they are consistent to each other. From the intensity ratio of these two databases we also found that the value of forward spillover scattering of the TRAO telescope system is 0.58.

변산반도국립공원에 위치한 내소사 주변 능선부의 식생구조를 파악하고자 세봉관음봉 구간에 방형구(400m2) 23개를 설정하여 식생을 조사하였다. 식물 군집분석을 통하여 분류한 결과 소나무군집과 소나무-굴참나무-졸참나무군집으로 분류되었다. 변산반도 내소사지역의 세봉관음봉지역은 대부분이 소나무, 굴참나무, 졸참나무, 서어나무, 신갈나무 등이 우점하고 있었다. 이 지역에서 굴참나무, 소나무가 부분적으로 우점종으로 분포하고 있으나 소나무의 상대우점치는 점점 작아지고 상대적으로 굴참나무, 졸참나무, 서어나무, 신갈나무의 우점치가 점차 커질 것으로 예상된다. 수종간의 상관관계에서는 굴참나무와 쇠물푸레, 단풍나무와 대팻집나무, 사람주나무와 산딸나무, 산딸나무와 굴피나무, 팥배나무와 서어나무 등의 수종들 간에는 높은 정의상관이 인정되었고, 소나무와 서어나무, 쇠물푸레와 서어나무, 신갈나무와 팥배나무, 대팻집나무와 팥배나무간에는 약한 부의상관이 인정되었다. 조사지의 군락별 종다양성지수는 0.665~1.169범위로 나타났다.

The International Astronomy Olympiad (IAO) was established by the Euro-Asian Astronomical Society in order to disseminate astronomical knowledge, promote international cooperation in astronomical education area and recognize the importance of astronomy in far-reaching field of science and human culture. The first IAO competition was held at the Special Astrophysical Observatory of the Russian Academy of Sciences located in the north Caucasus of Russia in 1996. Since then, it has been held every year. This paper describes the present status of the IAO main regulations regarding its operation and major results by year, related institutions, and organizations. We created a scientific inquiry framework to analyze past IAO problems in the recognitive aspect in order to measure levels of the scientific knowledges and the scientific thinking abilities. Through this analysis, we can understand the current status of the IAO, and examine the future direction of Korea Astronomy Olympiad. Also, we can make preparation for the IAO competition and the education of delegates.

Infrared color-color diagram of 10 giant molecular clouds are examined to explore the dust property from the COBE Diffuse Infrared Background Experiment of the 100, 140, and 240μm emission. Four of them, Taurus, Mon OB1, Gem OB1, and Chameleon, show the anti-correlation in R100/140−R140/240 plot and the horizontal distribution in R100/240−R140/240 plot, which disagree with those of theoretical calculation. These could be explained by the depletion of 100μm and the excess of 140μm emission, though no existing dust model could support them. Mean color temperature of the anti-correlation region appears to be lower than that of the linear region, whose temperatures are 15.3, 17.0 K, respectively. And the linear region shows large dispersion in the plot of intensity relation. Both imply that a star formation would be more active, but not homogeneous, in the linear region compared to the anti-correlation region.

We collected eleven large astronomical catalogues, which include 2MASS, USNO B1.0, GSC 2 catalogues and so on. Most of these catalogues are the frequently used by astronomers for all sorts of applications. But the researches are faced with the problem of accessing these databases because these catalogues contain from tens millions up to thousands of millions of records. So we developed a web application system to manage these large catalogues, the main purpose of the web application is to allow a powerful and efficient querying activity on these catalogues through internet by using a simple web interface. User could retrieve the query result in variety of formats including plain text, HTML, Microsoft Excel format (XLS), and VOTable. Furthermore, user also could display and analyze result graphically by using a powerful interactive visualization tools named VOPlot which was developed by the Virtual Observatory-India (VOI) project.

The First Generation Digitized Sky Survey (DSS-I) is a collection of digitized photographic atlases of the night sky taken from the Palomar Observatory (northen sky) and the Anglo-Australian Observatory (southern sky). DSS-I is widely used by the astronomical community for a number of applications including object cross-identification and astrometry. However, accessing and retrieving the actual images are nontrivial owing to the huge size (> 60 GB) of the dataset. To facilitate retrieval process of DSS-I data for the public, Korean Astronomical Data Center (KADC) developed a web application that provides not only data retrieval but also visualization functions. The web application consists of several modules developed using Java Applet, Jave Servlet, and JaveServer Pages (JSP) technologies. It allows users to retrieve images efficiently in various formats such as FITS, JPEG, GIF, and TIFF, and also offers an interactive visulization tool, ImgViewer, for displaying/analyzing FITS images. To use the web application, users require a Java-enabled web browser.