16,263 research outputs found
SO(10) and Large nu_mu - nu_tau Mixing
A general approach to understanding the large mixing seen in atmospheric
neutrinos is explained, as well as a highly predictive SO(10) model which
implements this approach. It is also seen how bimaximal mixing naturally arises
in this scheme. (Talk presented at NNN99, SUNY Stony Brook, Sept. 22-26, 1999)Comment: 10 pages, LaTe
Knee kinematics of total knee replacement patients: pre and post operative analysis using computer generated images
This project aims to show a comparison of knee kinematics in pre- and post-operative knee replacement surgery, using computer animation to represent a patient specific model of the knee joint interactions under every day conditions
The cluster environments of radio loud quasars
We have carried out multi-colour imaging of the fields of a statistically
complete sample of low-frequency selected radio loud quasars at 0.6<z<1.1, in
order to determine the characteristics of their environments. The largest radio
sources are located in the field, and smaller steep-spectrum sources are more
likely to be found in richer environments, from compact groups through to
clusters. This radio-based selection (including source size) of high redshift
groups and clusters is a highly efficient method of detecting rich environments
at these redshifts. Although our single filter clustering measures agree with
those of other workers, we show that these statistics cannot be used reliably
on fields individually, colour information is required for this.Comment: 5 pages, 3 figures, contribution to "Tracing Cosmic Evolution with
Galaxy Clusters" (Sesto 2001), ASP Conference Serie
Teachers’ experiences of an introductory coaching training workshop in Scotland: An interpretative phenomenological analysis
Objectives: This study sought to explore teachers’ experiences of a coaching psychology intervention — an introductory coaching training workshop that included a positive psychology intervention and episodes of narrative-collaborative group coaching.
Design: A qualitative design was applied to explore the participants’ experiences. The data was analysed using interpretative phenomenological analysis (IPA).
Method: The study took place in Scotland, where revised teaching standards require school leaders to use coaching skills. The participants were five teachers who had attended the workshop. Data collection was through semi-structured interviews.
Results: Two main themes emerged from the analysis. The first theme, ‘Learning with others — the value of collaboration’, had two sub-themes: ‘Working with a partner made it real’ and ‘Feeling part of the group’. The second theme, ‘Reflection — the value of time to think’ had three sub-themes: ‘Myself as coach and coachee’, ‘Coaching and other people’, and ‘Making plans to start coaching and sharing’.
Conclusions: The participants reported that their learning was enhanced by collaborating with others and having time for reflection. The limitations of the study are discussed and areas for future research are proposed
The stransverse mass, MT2, in special cases
This document describes some special cases in which the stransverse mass,
MT2, may be calculated by non-iterative algorithms. The most notable special
case is that in which the visible particles and the hypothesised invisible
particles are massless -- a situation relevant to its current usage in the
Large Hadron Collider as a discovery variable, and a situation for which no
analytic answer was previously known. We also derive an expression for MT2 in
another set of new (though arguably less interesting) special cases in which
the missing transverse momentum must point parallel or anti parallel to the
visible momentum sum. In addition, we find new derivations for already known
MT2 solutions in a manner that maintains manifest contralinear boost invariance
throughout, providing new insights into old results. Along the way, we stumble
across some unexpected results and make conjectures relating to geometric forms
of M_eff and H_T and their relationship to MT2.Comment: 11 pages, no figures. v2 corrects minor typos. v3 corrects an
incorrect statement in footnote 8 and inserts a missing term in eq (3.9). v4
and v5 correct minor typos spotted by reader
SUSY and Dark Matter Constraints from the LHC
The ability of the LHC to make statements about the dark matter problem is
considered, with a specific focus on supersymmetry. After reviewing the current
strategies for supersymmetry searches at the LHC (in both CMS and ATLAS), some
key ATLAS studies are used to demonstrate how one could establish that SUSY
exists before going on to measure the relic density of a neutralino WIMP
candidate. Finally, the general prospects for success at the LHC are
investigated by looking at different points in the MSSM parameter space.Comment: Talk given at the XLIrst Rencontres de Moriond session devoted to
Electroweak Interactions And Unified Theories in March 2006, to be published
in the associated proceedings. 10 pages, 8 figure
Infrared Signature of the Superconducting State in Pr(2-x)Ce(x)CuO(4)
We measured the far infrared reflectivity of two superconducting
Pr(2-x)Ce(x)CuO(4) films above and below Tc. The reflectivity in the
superconducting state increases and the optical conductivity drops at low
energies, in agreement with the opening of a (possibly) anisotropic
superconducting gap. The maximum energy of the gap scales roughly with Tc as 2
Delta_{max} / kB Tc ~ 4.7. We determined absolute values of the penetration
depth at 5 K as lambda_{ab} = (3300 +/- 700) A for x = 0.15 and lambda_{ab} =
(2000 +/- 300) A for x = 0.17. A spectral weight analysis shows that the
Ferrell-Glover-Tinkham sum rule is satisfied at conventional low energy scales
\~ 4 Delta_{max}.Comment: 4 pages, 4 figure
- …