• Title/Summary/Keyword: Astronomical Observations

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Influence of an Astronomical Observation Program on Preservice Elementary Teachers Astronomy Achievement, Astronomy Teaching Efficacy Beliefs, and Scientific Attitude (천체관측을 통한 학습이 천문성취도, 천문교수효능에 대한 신념, 과학적 태도에 미치는 효과)

  • 채동현
    • Journal of Korean Elementary Science Education
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    • v.18 no.2
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    • pp.79-101
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    • 1999

  • Astronomy is a good area to introduce a student to the study of science. The student often questions what causes the change in seasons, in the day and right, and in the rotation of stars, etc. Attempts to find answers to problems related to these astronomical observations influence the student`s intellectual development. This study is to investigate the effect of running an astronomical observations program on the preservice elementary teachers' astronomy achievement, astronomy teaching efficacy beliefs, and scientific attitude. Students consist of twenty four preservice elementary teachers. Three instruments are used: one is the astronomy achievement test, which is of an essay type, and 5 items. The other is the astronomy teaching efficacy beliefs test, which is of a Likert scale type, and 22 items. Another is the scientific attitude test, which is of the Likert scale type, and 10 items. Data are collected before and after instruction in the astronomical observations program, through the use of these tests. Data are compared. The results are: \circled1There is a significant difference between before and after instructions in the astronomy achievement test(t=11.31, p=000). \circled2There is a significant difference between before and after instructions in the astronomy teaching efficacy beliefs test(t=5.98, p=.000). \circled3There is a significant difference between before and after instructions in the scientific attitude test(t=270, pde. There fore, the a=.013). As a result, running an astronomical observations program has an effect on the preservice elementary teachers' astrono my achievement, astronomy teaching efficacy beliefs, and scientific attituuthor urges the teacher to teach astronomy through the astronomical observations in school.

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AKARI INFRARED OBSERVATIONS OF EMBEDDED YSOs IN THE MAGELLANIC CLOUDS

  • Shimonishi, T.;Onaka, T.;Kato, D.;Sakon, I.;Ita, Y.;Kawamura, A.;Kaneda, H.
    • Publications of The Korean Astronomical Society
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    • v.27 no.4
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    • pp.171-175
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    • 2012

  • Spectroscopic studies of extragalactic YSOs have shown a great progress in the last few years. Infrared observations with AKARI made significant contributions to that progress. In this proceeding, we are going to introduce our current research on the infrared observations of ices and dust around embedded YSOs in the Magellanic Clouds.

  • https://doi.org/10.5303/PKAS.2012.27.4.171 인용 PDF KSCI

HOW TO MONITOR AGN INTRA-DAY VARIABILITY AT 230GHZ

  • Kim, Jae-Young;Trippe, Sascha
    • Journal of The Korean Astronomical Society
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    • v.46 no.2
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    • pp.65-74
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    • 2013

  • We probe the feasibility of high-frequency radio observations of very rapid flux variations in compact active galactic nuclei (AGN). Our study assumes observations at 230GHz with a small 6-meter class observatory, using the SNU Radio Astronomical Observatory (SRAO) as an example. We find that 33 radio-bright sources are observable with signal-to-noise ratios larger than ten. We derive statistical detection limits via exhaustive Monte Carlo simulations assuming (a) periodic, and (b) episodic flaring flux variations on time-scales as small as tens of minutes. We conclude that a wide range of flux variations is observable. This makes high-frequency radio observations-even with small observatories-a powerful probe of AGN intra-day variability; especially, those which complement observations at lower radio frequencies with larger observatories like the Korean VLBI Network (KVN).

  • https://doi.org/10.5303/JKAS.2013.46.2.65 인용 PDF KSCI