2,244 research outputs found
Student interpersonal skill instruction and self-esteem.
The purpose of this study was to examine whether a ten-session program that teaches interpersonal skills to grade four, five and six students would increase student self-esteem and interpersonal skills. A total of 285 children from two public elementary schools were divided into one school as the experimental group and one school as the control group. Before and after the experimental manipulation, all children completed the Culture Free Self-esteem Inventory, Interpersonal Skills Inventory, and How I Feel About Others In My Class survey. The experimental group received the program Helping Kids Find Their Strengths . Themes of the program included identifying one\u27s strengths and helping others to realize their strengths, looking at good experiences and using those experiences to make better choices and effective listening and communication skills. Control group students received regular classroom curriculum. Results indicated that the self-esteem and interpersonal skills of the students in the experimental and control groups were not significantly different. Source: Masters Abstracts International, Volume: 39-02, page: 0331. Adviser: Larry Morton. Thesis (M.Ed.)--University of Windsor (Canada), 2000
Order in a Spatially Anisotropic Triangular Antiferromagnet
The phase diagram of the spin-1/2 Heisenberg antiferromagnet on an
anisotropic triangular lattice of weakly coupled chains, a model relevant to
Cs2CuCl4, is investigated using a renormalization group analysis, which
includes marginal couplings important for connecting to numerical studies of
this model. In particular, the relative stability of incommensurate spiral
spin-density order and collinear antiferromagnetic order is studied. While
incommensurate spiral order is found to exist over most of the phase diagram in
the presence of a Dzyaloshinskii-Moriya (DM) interaction, at small interchain
and extremely weak DM couplings, collinear antiferromagnetic order can survive.
Our results imply that Cs2CuCl4 is well within the part of the phase diagram
where spiral order is stable. The implications of the renormalization group
analysis for numerical studies, many of which have found spin-liquidlike
behavior, are discussed.Comment: 10 pages, 7 figures, minor edits and reference adde
On The Evolution of Magnetic White Dwarfs
We present the first radiation magnetohydrodynamics simulations of the
atmosphere of white dwarf stars. We demonstrate that convective energy transfer
is seriously impeded by magnetic fields when the plasma-beta parameter, the
thermal to magnetic pressure ratio, becomes smaller than unity. The critical
field strength that inhibits convection in the photosphere of white dwarfs is
in the range B = 1-50 kG, which is much smaller than the typical 1-1000 MG
field strengths observed in magnetic white dwarfs, implying that these objects
have radiative atmospheres. We have then employed evolutionary models to study
the cooling process of high-field magnetic white dwarfs, where convection is
entirely suppressed during the full evolution (B > 10 MG). We find that the
inhibition of convection has no effect on cooling rates until the effective
temperature (Teff) reaches a value of around 5500 K. In this regime, the
standard convective sequences start to deviate from the ones without convection
owing to the convective coupling between the outer layers and the degenerate
reservoir of thermal energy. Since no magnetic white dwarfs are currently known
at the low temperatures where this coupling significantly changes the
evolution, effects of magnetism on cooling rates are not expected to be
observed. This result contrasts with a recent suggestion that magnetic white
dwarfs with Teff < 10,000 K cool significantly slower than non-magnetic
degenerates.Comment: 11 pages, 12 figures, accepted for publication in the Astrophysical
Journa
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