6,306 research outputs found
Examination of the inter-rater agreement among faculty marking a research proposal on an undergraduate health course
Copyright @ 2009 The Internet Journal of Allied Health Sciences and Practice.Purpose: This research looked at inter-rater agreement among faculty marking a research proposal on an undergraduate health course. The purpose of this study was to investigate if there were significant differences between marks as well as the comments given on research proposals that were double marked by two faculty members, where faculty were blind to the other markerâs marks and comments. Subjects: The subjects for this study consisted of 80 final year health students who submitted a research proposal and 13 full-time and 10 part-time faculty members who double marked the proposals. Methods: Faculty pairs marked the proposals independently and were required to meet with each other and discuss the marks given, reasons for the mark and the comments. Markers were asked to come to an agreement about the mark and the comments. Analyses: Agreement in marks was assessed using a Bland-Altman plot. Weighted Cohen's Kappa was used to estimate the agreement between the classifications given by markers. Comments were analyzed for differences using thematic analysis. Results: There was a wide discrepancy in the classification of students between markers. The weighted proportions found to agree on classification was 46%. Analysis of the comments indicated a wide discrepancy between markers. Conclusion: The outcomes of this study are similar to previous studies that have looked at inter-rater agreement when double marking was used to mark various types of written assignments. Further exploration of the inter-rater agreement in the marking process and other marking processes that results in a transparent system is needed
Black hole quasinormal modes using the asymptotic iteration method
In this article we show that the asymptotic iteration method (AIM) allows one
to numerically find the quasinormal modes of Schwarzschild and Schwarzschild de
Sitter (SdS) black holes. An added benefit of the method is that it can also be
used to calculate the Schwarzschild anti-de Sitter (SAdS) quasinormal modes for
the case of spin zero perturbations. We also discuss an improved version of the
AIM, more suitable for numerical implementation.Comment: 10 pages, LaTeX; references added; substantially expanded versio
Split fermion quasi-normal modes
In this paper we use the conformal properties of the spinor field to show how
we can obtain the fermion quasi-normal modes for a higher dimensional
Schwarzschild black hole. These modes are of interest in so called split
fermion models, where quarks and leptons are required to exist on different
branes in order to keep the proton stable. As has been previously shown, for
brane localized fields, the larger the number of dimensions the faster the
black hole damping rate. Moreover, we also present the analytic forms of the
quasi-normal frequencies in both the large angular momentum and the large mode
number limits.Comment: 11 pages, 7 figures, version 2 added reference
Graviton emission from simply rotating Kerr-de Sitter black holes: Transverse traceless tensor graviton modes
In this article we present results for tensor graviton modes (in seven
dimensions and greater, ) for greybody factors of Kerr-dS black holes
and for Hawking radiation from simply rotating (n+4)-dimensional Kerr black
holes. Although there is some subtlety with defining the Hawking temperature of
a Kerr-dS black hole, we present some preliminary results for emissions
assuming the standard Hawking normalization and a Bousso-Hawking-like
normalization.Comment: 12 pages, 18 figure
Angular Eigenvalues of Higher-Dimensional Kerr-(A)dS Black Holes with Two Rotations
In this paper, following the work of Chen, L\"u and Pope, we present the
general metric for Kerr-(A)dS black holes with two rotations. The corresponding
Klein-Gordon equation is separated explicitly, from which we develop
perturbative expansions for the angular eigenvalues in powers of the rotation
parameters with .Comment: 10 pages, no figures. To appear in the proceedings of 2011 Shanghai
Asia-Pacific School and Workshop on Gravitatio
Bulk dominated fermion emission on a Schwarzschild background
Using the WKBJ approximation, and the Unruh method, we obtain semi-analytic
expressions for the absorption probability (in all energy regimes) for Dirac
fermions on a higher dimensional Schwarzschild background. We present an
analytic expression relating the absorption probability to the absorption
cross-section, and then use these results to plot the emission rates to third
order in the WKBJ approximation. The set-up we use is sufficiently general such
that it could also easily be applied to any spherically symmetric background in
-dimensions. Our results lead to the interesting conclusion that for
bulk fermion emission dominates brane localised emission. This is an example
contrary to the conjecture that black holes radiate mainly on the brane.Comment: 13 pages, 3 figure
Noise Robust Blind System Identification Algorithms Based On A Rayleigh Quotient Cost Function
Felsic Volcanic Units in the Boston Area, Massachusetts
Guidebook to geologic field studies in Rhode Island and adjacent areas: The 73rd annual meeting of the New England Intercollegiate Geological Conference, October 16-18, 1981: Trip C-
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