منابع مشابه
Suitable Starting of a Small Teaching Group
Using small groups in teaching and learning has a long history. Evidence suggests that by applying some defined guidelines, it would be possible to reinforce the effectiveness of the small groups teaching. One of these guidelines is related to ice-breaker activities which would be applied by the facilitators at the start of the session, which are noticeably significant. The aim of the presen...
متن کاملPlanetary Nebulae Surveys Beyond the Local Group
Distant planetary nebulae (PNe) are used to measure distances through the PN luminosity function, as kinematic tracers in determining the mass distribution in elliptical galaxies, and most recently, for measuring the kinematics of the diffuse stellar population in galaxy clusters. This article reviews the photometric and spectroscopic survey techniques that have been used to detect PNe beyond t...
متن کاملLocal Group surveys for Planetary Nebulae
The Local Group (LG) represents the best environment to study in detail the PN population in a large number of morphological types of galaxies. The closeness of the LG galaxies allows to investigate the faintest side of the PN luminosity function and to detect PNe also in the less luminous galaxies, the dwarf galaxies, where a small number of them is expected. A review of the results of the mos...
متن کاملThe Environment and Seating Arrangement of a Small Teaching Group
Small groups which form for teaching and learning process would have substantial outcomes if manage properly. Evidence suggests that environment and seating arrangement of the learners would have considerable impacts on the success of a facilitator to properly use from the dynamics of the group. The aim of the present article is therefore to discuss the appropriate environment and seating arran...
متن کاملStability of Small Grains in Hii Regions and Reflection Nebulae
We have analyzed IRAS data to assess the relative amounts of small and large grains in HH regions and reflection nebulae. Our most important finding is that no evidence for small grain destruction is seen in reflection nebulae, even for [high] values of the radiation energy density at which significant grain destruction apparently occurs in HH regions. This suggests that it is not only the tota...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1906
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19061730804