1,264 research outputs found
Measuring intermediate mass black hole binaries with advanced gravitational wave detectors
We perform a systematic study to explore the accuracy with which the
parameters of intermediate-mass black-hole binary systems can be measured from
their gravitational wave (GW) signatures using second-generation GW detectors.
We make use of the most recent reduced-order models containing inspiral, merger
and ringdown signals of aligned-spin effective-one-body waveforms (SEOBNR) to
significantly speed up the calculations. We explore the phenomenology of the
measurement accuracies for binaries with total masses between 50 and 500
and mass ratios between 0.1 and 1. We find that (i) at total masses
below ~200 , where the signal-to-noise-ratio is dominated by the
inspiral portion of the signal, the chirp mass parameter can be accurately
measured; (ii) at higher masses, the information content is dominated by the
ringdown, and total mass is measured more accurately; (iii) the mass of the
lower-mass companion is poorly estimated, especially at high total mass and
more extreme mass ratios; (iv) spin cannot be accurately measured for our
injection set with non-spinning components. Most importantly, we find that for
binaries with non-spinning components at all values of the mass ratio in the
considered range and at network signal-to-noise ratio of 15, analyzed with
spin-aligned templates, the presence of an intermediate-mass black hole with
mass >100 can be confirmed with 95% confidence in any binary that
includes a component with a mass of 130 or greater.Comment: 6 pages, 8 figures; published versio
Large scale evaluation of importance maps in automatic speech recognition
In this paper, we propose a metric that we call the structured saliency
benchmark (SSBM) to evaluate importance maps computed for automatic speech
recognizers on individual utterances. These maps indicate time-frequency points
of the utterance that are most important for correct recognition of a target
word. Our evaluation technique is not only suitable for standard classification
tasks, but is also appropriate for structured prediction tasks like
sequence-to-sequence models. Additionally, we use this approach to perform a
large scale comparison of the importance maps created by our previously
introduced technique using "bubble noise" to identify important points through
correlation with a baseline approach based on smoothed speech energy and forced
alignment. Our results show that the bubble analysis approach is better at
identifying important speech regions than this baseline on 100 sentences from
the AMI corpus.Comment: submitted to INTERSPEECH 202
Marxism and the Rule of Law
The revival of interest in Marxist legal analysis has prompted a reconsideration of the function of the concept of the rule of law. Appreciation of the rule of law as an instrument of legitimation of the economic and political order has assumed particular significance in Canada due to the recent enactment of the Canadian Charter of Rights and Freedoms. In this article the author examines the two aspects in which the rule of law may be said to exist - the democratic and the juridical - and through the application of Marxist analysis to several recent political events demonstrates the relationship of the rule of law to developments in the politico-legal system characteristic of late capitalism
Discrediting the McDonald Commission
It\u27s a safe bet that very few Canadians will ever actually read the McDonald Commission\u27s report on RCMP wrong-doing. Four years of waiting were probably enough to disinterest the amateurs, and the report itself - 1,784 or so ponderously written and densely printed pages of minute pickings over testimony, dry legal analysis of same and exhaustive recommendations for the future - is calculated to daunt all but the most rabid of RCMP-scandal watchers and the driest of legal academics. After receiving the report in January, 1981, the Government spent the next eight months preparing the proper context for releasing it, which was finally done on August 25. The proper context, naturally, was one in which the less pleasant aspects of the report would do the least damage. This meant a public relations campaign in which, among other things, much was made of the fact that the commissioners had absolved Liberal cabinet ministers of legal complicity in RCMP crimes and in which the Government announced with great fanfare that it was accepting the Commission\u27s recommendation that the Security Service be located outside of the RCMP
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