20 research outputs found
Pegylated TNF-α Receptor Does Not Prevent Acute Graft-versus-Host Disease in the Dog Leukocyte Antigen-Nonidentical Unrelated Canine Model
The population of barred galaxies in the local universe I. Detection and characterisation of bars
(Abridge) Bars are very common in the centre of the disc galaxies, and they
drive the evolution of their structure. A volume-limited sample of 2106 disc
galaxies extracted from the Sloan Digital Sky Survey Data Release 5 was studied
to derive the bar fraction, length, and strength as a function of the
morphology, size, local galaxy density, light concentration, and colour of the
host galaxy. The bars were detected using the ellipse fitting method and
Fourier analysis method. The ellipse fitting method was found to be more
efficient in detecting bars in spiral galaxies. The fraction of barred galaxies
turned out to be 45%. A bar was found in 29% of the lenticular galaxies, in 55%
and 54% of the early- and late-type spirals, respectively. The bar length
(normalised by the galaxy size) of late-type spirals is shorter than in
early-type or lenticular ones. A correlation between the bar length and galaxy
size was found with longer bars hosted by larger galaxies. The bars of the
lenticular galaxies are weaker than those in spirals. Moreover, the unimodal
distribution of the bar strength found for all the galaxy types argues against
a quick transition between the barred and unbarred statues. There is no
difference between the local galaxy density of barred and unbarred galaxies.
Besides, neither the length nor strength of the bars are correlated with the
local density of the galaxy neighbourhoods. In contrast, a statistical
significant difference between the central light concentration and colour of
barred and unbarred galaxies was found. Bars are mostly located in less
concentrated and bluer galaxies. These results indicate that the properties of
bars are strongly related to those of their host galaxies, but do not depend on
the local environment.Comment: 15 pages, 13 figures. Accepted for publication in A&
Collider aspects of flavour physics at high Q
This review presents flavour related issues in the production and decays of
heavy states at LHC, both from the experimental side and from the theoretical
side. We review top quark physics and discuss flavour aspects of several
extensions of the Standard Model, such as supersymmetry, little Higgs model or
models with extra dimensions. This includes discovery aspects as well as
measurement of several properties of these heavy states. We also present public
available computational tools related to this topic.Comment: Report of Working Group 1 of the CERN Workshop ``Flavour in the era
of the LHC'', Geneva, Switzerland, November 2005 -- March 200
Pegylated TNF-α Receptor Does Not Prevent Acute Graft-versus-Host Disease in the Dog Leukocyte Antigen-Nonidentical Unrelated Canine Model
Using a gamified mobile app to increase student engagement, retention and academic achievement
Abstract This study investigated whether the use of a gamified mobile learning app influenced students’ academic performance and boosted their engagement in the subject. Created to better engage students in lecture content, the app was used to deliver multiple-choice content-based quizzes directly to students’ personal mobile devices post-lecture and pre-tutorial. After measuring the relationships between students’ app usage and their engagement, retention and academic achievement in the subject, it is suggested that following the app’s introduction, student retention rates and academic performance increased, and there was a positive correlation between students’ scoring highly on the app and achieving higher academic grades. While the app’s affordances for learning are promising, the causal relationship between the app usage and improved student outcomes requires further investigation. Conclusions made in the context of the wider scholarship of mobile app enhanced learning and applied game principles in HE