The Power Spectrum of Rich Clusters of Galaxies on Large Spatial Scales

We present an analysis of the redshift-space power spectrum, $P(k)$, of rich clusters of galaxies based on an automated cluster catalogue selected from the APM Galaxy Survey. We find that $P(k)$ can be approximated by a power law, P(k)\proptok^{n}, with $n\approx-1.6$ over the wavenumber range 0.04\hr. Over this range of wavenumbers, the APM cluster power spectrum has the same shape as the power spectra measured for optical and IRAS galaxies. This is consistent with a simple linear bias model in which different tracers have the same power spectrum as that of the mass distribution but shifted in amplitude by a constant biasing factor. On larger scales, the power spectrum of APM clusters flattens and appears to turn over on a scale k \sim 0.03\hmpcrev. We compare the power spectra estimated from simulated APM cluster catalogues to those estimated directly from cubical N-body simulation volumes and find that the APM cluster survey should give reliable estimates of the true power spectrum at wavenumbers k \simgt 0.02\hmpcrev. These results suggest that the observed turn-over in the power spectrum may be a real feature of the cluster distribution and that we have detected the transition to a near scale-invariant power spectrum implied by observations of anisotropies in the cosmic microwave background radiation. The scale of the turn-over in the cluster power spectrum is in good agreement with the scale of the turn-over observed in the power spectrum of APM galaxies.Comment: 9 pages, 7 ps figures, two style files, submitted to MNRAS. Un-xxx-ed version available at http://www-astro.physics.ox.ac.uk/research/preprints/aug97/cluspaper.ps.g

The impact of training on teacher knowledge about children with an intellectual disability

The present study examines the impact of a short training session on the knowledge of teaching staff in Scotland about children with an intellectual disability. Despite the majority of participants reporting that they had a child with an intellectual disability in their classroom, the initial level of knowledge concerning intellectual disability was low. This was partly considered to be due to terminology differences that exist between the health and education sectors and a lack of training specific to the needs of children with an intellectual disability. Training was shown to significantly improve the basic knowledge needed to understand intellectual disability immediately after training and at a 1 month follow-up, suggesting that the knowledge gains would be sustained in the longer term

Changes made to the Wechsler Intelligence Scale for Children – Third Edition by Psychologists working in Child Services

Psychologists were found to amend the way they used the WISC-III, by either regularly missing out sub-tests or not following the standardised manual instructions. The majority felt these changes would impact on the test scores of the individual child

Qualitative Data Analysis Challenges in Co-Designing Educational Technology Systems for Refugee Children

There is a growing interest in the potential for technology to facilitate emergency education of refugee children. But designing in this space requires knowledge of the displaced population and the contextual dynamics surrounding it. Design should therefore be informed by both existing research across relevant disciplines, and from those who are on the ground facing the problem in real life. This paper describes a process that is based on literature from emergency education, student engagement and motivation, educational technology, and participatory design. We describe how this process was implemented leading to the design of a digital learning space for children living in a refugee camp in Greece. The challenge of data analysis is critical, as the qualitative data in the process is elicited from activities of various natures and thus moving from qualitative data to designs is a critical challenge that we are looking to cover for our process to be complete and applicable. We discuss some of the challenges that can be expected in such context

A survey of teacher feeling in selected areas concerned with evaluation of teacher service to children

Thesis (Ed.M.)--Boston Universit

Financial services misconduct and the corporations act 2001

This working paper is the second published output of an eighteen-month (December 2014 – June 2016) research project conducted by staff at the Melbourne Law School that examines enforcement and penalties regimes under legislation administered by the Australian Securities and Investments Commission (ASIC). The paper follows Working Paper 1’s scoping of penalties under ASIC administered legislation by discussing enforcement under the Corporations Act2 through the lens of a study of court-based enforcement by ASIC of financial services misconduct. The paper is in three parts. Part I considers current debates about penalties regimes available to ASIC. Part II discusses the provisions and penalties presently operating under the Corporations Act for financial services misconduct. Part III examines the actual penalties handed down for corporate wrongdoing for financial services misconduct in Australian Courts by way of a small case study of ASIC court based enforcement cases from 2011-2013. Part IV concludes

The Power Spectrum of IRAS Galaxies

We estimate the three-dimensional power spectrum of IRAS galaxies from the QDOT and $1.2$Jy redshift surveys. We use identical estimators for both surveys and show how the results depend on the weights assigned to the galaxies. The power spectrum for the QDOT survey is steeper and has a higher amplitude at wavenumbers $k \sim 0.05\; h {\rm Mpc}^{-1}$ (where $h$ is Hubble's constant in units of 100 \kmsmpc) than the power spectrum derived from the $1.2$Jy sample. However, the QDOT power spectrum is sensitive to a small number of galaxies in the Hercules supercluster, in agreement with a recent analysis of galaxy counts in cells in these surveys. We argue that the QDOT results are an upward fluctuation. We combine the two surveys to derive our best estimate of the power spectrum of IRAS galaxies. This is shallower and has a lower amplitude on scales \simlt 0.1 h {\rm Mpc}^{-1} than the power spectrum derived by Feldman \et (1994) from the QDOT survey alone. The power spectrum of the combined surveys is well described by the linear theory power spectrum of a scale-invariant cold dark matter model with $\Omega h = 0.2$.Comment: 5 pages, uuencoded compressed PostScript, 3 figures included. Accepted for publication in MNRAS pink page