6 research outputs found
Can we trust elemental abundances derived in late-type giants with the classical 1D stellar atmosphere models?
We compare the abundances of various chemical species as derived with 3D
hydrodynamical and classical 1D stellar atmosphere codes in a late-type giant
characterized by T_eff=3640K, log g = 1.0, [M/H] = 0.0. For this particular set
of atmospheric parameters the 3D-1D abundance differences are generally small
for neutral atoms and molecules but they may reach up to 0.3-0.4 dex in case of
ions. The 3D-1D differences generally become increasingly more negative at
higher excitation potentials and are typically largest in the optical
wavelength range. Their sign can be both positive and negative, and depends on
the excitation potential and wavelength of a given spectral line. While our
results obtained with this particular late-type giant model suggest that 1D
stellar atmosphere models may be safe to use with neutral atoms and molecules,
care should be taken if they are exploited with ions.Comment: Poster presented at the IAU Symposium 265 "Chemical Abundances in the
Universe: Connecting First Stars to Planets", Rio de Janeiro, 10-14 August
2009; 2 pages, 1 figur
Environmental conditions and human interference during the 6th and 13th–15th centuries a.d. at Vilnius Lower Castle, east Lithuania
Mothers’ attitudes toward peer play
Autorės Monikos Skerytės-Kazlauskienės prieskyra nurodyta : "Lithuanian University of Educational Sciences"Mothers’ attitudes toward their children’s peer play is analyzed in the chapter. Research data was collected in the families that have two or more children of various ages and where children’s play is valued. Six interviews with mothers were carried out. The mothers were asked about the value of children’s peer play. Analysis of the data highlighted the most significant aspects of peer play outlined by the mothers: peer play releases children’s creative potential; peer play is a space where children develop long-lasting mutual relationships; constantly changing peer play support the development of children. In addition, the study revealed that mother’s understanding of children’s conflicts in play differs from the existing institutional practices. The implications of these findings suggest, that knowledgeable parents possess deep and valuable observations of children’s peer play that should be used to reconceptualize some important topics in early childhood educationEdukologijos tyrimų institutasVytauto Didžiojo universitetasŠvietimo akademij