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Butakov S.,Concordia University of Edmonton | Murzintsev S.,Altai Academy of Economics and Law | Tskhai A.,Altai Academy of Economics and Law
2016 International Conference on Platform Technology and Service, PlatCon 2016 - Proceedings | Year: 2016

The paper looks at the platform scalability problem for near-to-similar document detection tasks. The application areas for the proposed approach include plagiarism detection and text filtering in data leak prevention systems. The paper reviews limitations of the current solutions based on the relational DBMS and suggests data structure suitable for implementation in no-SQL databases on the highly scalable clustered platforms. The proposed data structure is based on key-value model and it does not depend on the shingling method used to encode the text. The proposed model was implemented on the clustered MongoDB platform and tested with the large dataset on the platform that was scaled up horizontally during the experiment. The experiments indicated the applicability of the proposed approach to near-to-similar document detection. © 2016 IEEE.

Utting N.,University of Ottawa | Utting N.,Concordia University of Edmonton | Lauriol B.,University of Ottawa | Lacelle D.,University of Ottawa | Clark I.,University of Ottawa
Quaternary Research (United States) | Year: 2016

Argon, krypton and xenon have different solubilities in water, meaning their ratios in water are different from those in atmospheric air. This characteristic is used in a novel method to distinguish between ice bodies which originate from the compaction of snow (i.e. buried snow banks, glacial ice) vs. ice which forms from the freezing of groundwater (i.e. pingo ice). Ice which forms from the compaction of snow has gas ratios similar to atmospheric air, while ice which forms from the freezing of liquid water is expected to have gas ratios similar to air-equilibrated water. This analysis has been conducted using a spike dilution noble gas line with gas extraction conducted on-line. Samples were mixed with an aliquot of rare noble gases while being melted, then extracted gases are purified and cryogenically separated. Samples have been analysed from glacial ice, buried snow bank ice, intrusive ice, wedge ice, cave ice and two unknown ice bodies. Ice bodies which have formed from different processes have different gas ratios relative to their formation processes. © 2015 University of Washington.

Dumsday T.,Concordia University of Edmonton
Journal of Bioethical Inquiry | Year: 2016

If elective abortion is publicly funded, then the government is obligated to take active measures designed to reduce its prevalence. I present two arguments for that conclusion. The first argument is directed at those pro-choice thinkers who hold that while some or all elective abortions are morally wrong, they still ought to be legally permitted and publicly subsidized. The second argument is directed at pro-choice thinkers who hold that there is nothing morally wrong with elective abortion and that it should be both legally permitted and publicly subsidized. The second argument employs premises that generalize beyond the abortion debate and that may serve to shed light on broader questions concerning conscience and the requirements of political compromise in a democracy. © 2015, Journal of Bioethical Inquiry Pty Ltd.

Keelan J.,Concordia University of Edmonton | Beard Ashley L.,Trillium Health Partners | Morra D.,Trillium Health Partners | Busch V.,Universiteitsweg 100 | And 2 more authors.
Health Policy and Technology | Year: 2015

Virtual worlds are an example of Web 2.0 applications which are increasingly being utilized for their interactive and immersive environments to share health information with the public and to study health-relevant behaviors. Second Life is one of the best known web-based virtual world platforms and offers researchers a range of new opportunities to conduct health research and to observe digitally-mediated behaviors. To explore the utility of conducting health-related research in a virtual world, we hosted two pilot projects in Second Life, one a quantitative health communication intervention and the other, a qualitative focus groups, examining concerns over the safety and benefits of immunization. Both pilot studies replicated research projects our team had led using conventional focus groups and pre- and post-exposure questionnaires for an information session on the safety of vaccines. Both studies were also ultimately unsuccessful. This article provides a post-hoc analysis of our experiences. We identified that the primary advantages of virtual world research are (1) reducing physical/geographic barriers to participation; (2) providing low cost tools to design unique mixed-media communication channels and interfaces; (3) anonymity and avatar representation can encourage discussion on sensitive topics; and (4) facilitating the observation of a range of digitally-mediated behaviors. However, the primary disadvantage of participant difficulty learning how to use Second Life negated the potential benefits. We conclude that virtual worlds offer promise for health research, however, in order for them to realize their potential they will have to be made more accessible to new users. © 2015 Fellowship of Postgraduate Medicine.

Marinov T.T.,Southern University at New Orleans | Marinova R.S.,Concordia University of Edmonton | Vatsala A.S.,University of Louisiana at Lafayette
Neural, Parallel and Scientific Computations | Year: 2015

This is a study concerning the identification of the heterogeneous flexural rigidity of a beam governed by the steady-state Euler-Bernoulli fourth order ordinary differential equation. We use the method of Variational Imbedding (MVI) to deal with the inverse problem for the coefficient identification from over-posed data. The method is identifying the coefficient by approximating it with a piece-wise polynomial function. Several types of piece-wise polynomial functions are considered: piece-wise constant; linear spline; and cubic spline. It is observed in this study that the numerical solution of the variational problem coincides with the direct simulation of the original problem within the second order of approximation. © Dynamic Publishers, Inc.

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