16,971 research outputs found
Re-using features of English as a foreign language (EFL) materials for special needs students of the same age group
This paper identifies a lack of age-appropriate literacy software for dyslexic teenagers in Irish classrooms and
investigates the features of English as a Foreign Language (EFL) software that could be helpful to dyslexic
students. There are often two distinct special learner groups within the same classroom: special needs students
with reading difficulties in their native language and EFL students. While there are clear differences between
these two groups, there is some overlap in their linguistic difficulties, e.g. spelling. There is a lack of age-appropriate software aimed at dyslexic teenagers; most software used is aimed at dyslexic children. However, a
lot of materials are available for teenage EFL students. The paper discusses a survey of teenage dyslexic
students and teachers/tutors of dyslexic teenagers, which identified student needs and desired features/exercises
for curriculum-focused Computer-Assisted Language Learning (CALL) software for dyslexic students that the
author is developing. Results show overlap of features and exercises present in existing EFL software
Exact treatment of states
Using the basic ingredient of supersymmetry, a general procedure for the
treatment of quantum states having nonzero angular momenta is presented.Comment: 7 pages article in LaTEX (uses standard article.sty). No Figures.
Accepted by Chinese Physics Letters (2004, vol 21. No.9
Testing the presence of multiple photometric components in nearby early-type galaxies using SDSS
We investigate two-dimensional image decomposition of nearby, morphologically
selected early-type galaxies (ETGs). We are motivated by recent observational
evidence of significant size growth of quiescent galaxies and theoretical
development advocating a two-phase formation scenario for ETGs. We find that a
significant fraction of nearby ETGs show changes in isophotal shape that
require multi-component models. The characteristic sizes of the inner and outer
component are and kpc. The inner component lies on the
mass-size relation of ETGs at , while the outer component
tends to be more elliptical and hints at a stochastic buildup process. We find
real physical differences between the single- and double-component ETGs, with
the double-component galaxies being younger and more metal-rich. The fraction
of double component ETGs increases with increasing and decreases in
denser environments. We hypothesize that double-component systems were able to
accrete gas and small galaxies until later times, boosting their central
densities, building up their outer parts, and lowering their typical central
ages. In contrast, the oldest galaxies, perhaps due to residing in richer
environments, have no remaining hints of their last accretion episode.Comment: resubmitted to ApJ after referee's repor
Green's Functions and the Adiabatic Hyperspherical Method
We address the few-body problem using the adiabatic hyperspherical
representation. A general form for the hyperangular Green's function in
-dimensions is derived. The resulting Lippmann-Schwinger equation is solved
for the case of three-particles with s-wave zero-range interactions. Identical
particle symmetry is incorporated in a general and intuitive way. Complete
semi-analytic expressions for the nonadiabatic channel couplings are derived.
Finally, a model to describe the atom-loss due to three-body recombination for
a three-component fermi-gas of Li atoms is presented.Comment: 14 pages, 8 figures, 2 table
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