For other similarly named institutions, see Concordia University Concordia University College of Alberta, is an independent publicly funded university in Edmonton, Alberta, Canada. Accredited under the Alberta Post-secondary Learning Act. Concordia is primarily funded by the Government of Alberta, tuition, and private donations. Wikipedia.
Cui B.,Beijing Normal University |
He Q.,Beijing Normal University |
Zhang K.,University of Calgary |
Chen X.,Concordia University College of Alberta
Oecologia | Year: 2011
Vegetation zonation patterns in coastal marshes are hypothesized to be the result of both physical stress and competitive interactions. How these patterns may be driven by these factors at different life history stages remains poorly understood. We investigated the relative importance of species tolerance (response to physical stress) and competitive ability in determining the distributions of two dominant marsh species across a salt-fresh marsh interface in the Yellow River Estuary, China. There is a steep gradient in salinity across this interface and Suaeda salsa, an annual, dominates the saline side of the interface, while Phragmites australis, a perennial species, dominates the freshwater side. Using a series of field transplants, we examined the roles of physical stress and competition in mediating this zonation at different life history stages. Suaeda salsa performed well in its home zone, but seedling emergence, seedling survival, adult survival and adult growth were significantly suppressed by competition in the freshwater P. australis zone. Emergence, survival and growth of P. australis were inhibited in the saline S. salsa zone, regardless of neighbor treatments, but it performed well in its home zone. The magnitude of the competitive effect on the performance of S. salsa differed among the life history stages. Competition from P. australis had a much stronger effect on S. salsa seedling emergence and adult growth than on seedling survival and adult survival. Our results reveal that both physical stress and competition contributed to the observed zonation patterns in this marsh system. However, for S. salsa, the effect of competition varied with life-history stage. Insight into these ecological processes is critical to understanding how the zonation pattern in the marsh system is formed and maintained. © 2011 Springer-Verlag.
Smith J.K.,University of Alberta |
Given L.M.,Charles Sturt University |
Julien H.,University of Alabama |
Ouellette D.,Concordia University College of Alberta |
DeLong K.,University of Alberta
Library and Information Science Research | Year: 2013
This study examines how high school students' information literacy (IL) skills prepare them for academic work in the digital age. The project included: (a) an audit of university IL practices; and (b) the administration of the James Madison University (JMU) Information Literacy Test (ILT) to 103 twelfth grade students in Alberta, Canada. Due to the low stakes of the test, there was concern about the reliability of the results. Rapid guessing, response time effort, and motivation filters were applied to confirm the reliability of the results. Results indicate a gap between expectations of high school students and their skills. Using a standardized test, potential incoming undergraduate IL proficiency was identified, including student strengths and weaknesses. The audit identified IL policies and practices at the university, indicating discrepancies in the IL instruction students may receive. Findings indicate that students lack the IL proficiency required to succeed in the post-secondary educational environment, and the libraries are not prepared to effectively address this gap. © 2013 Elsevier Inc.
Fernando D.,Concordia University College of Alberta |
Zavarsky P.,Concordia University College of Alberta
World Congress on Internet Security, WorldCIS-2012 | Year: 2012
Retention and disposal of confidential information by an organization requires diligence. Unfortunately, the current disposal methods of Confidential Electronically Stored Information (CESI) have resulted in many security breaches and violations of existing regulations. As financial & litigation risk, loss of consumer confidence and detrimental business reputation are realities of security breaches, the objective of this research is to propose a framework for processing of CESI securely, during the disposal phase, utilizing the "sandbox" methodology to process and sanitize CESI. This is achieved by introducing categorization of information groups and using a classification scheme to depict the level of confidentiality quantified by a "value portfolio". The thresholds in the value portfolio enables organizations to establish clear and practical security policies in processing and disposing of ESI during the Information Life Cycle (ILC). © 2012 Infonomics Society.
Law C.C.H.,Concordia University College of Alberta |
Chen C.C.,Appalachian State University |
Wu B.J.P.,Tamkang University
Computers in Industry | Year: 2010
Companies adopting enterprise resource planning (ERP) systems have often focused primarily on implementation-related factors while neglecting those of post-implementation. As a result, the usefulness and operation of the ERP systems, once installed, are compromised. This research adopted a case study approach to demonstrate that ERP adoption efforts that fail to pay attention to post-implementation requirements (especially those relevant to maintenance and support (M&S)) from an early stage in the project lifecycle will face dire consequences. It points out that poor planning and management of M&S services can imperil the normal operations of an ERP system and the daily activities of a business. With the life span of ERP systems getting shorter, sound M&S practices can extend their life and create a stable system platform to support efficient and effective business operations. M&S issues deserve to be considered as integral elements among the critical success factors (CSF) of ERP adoption projects. In other words, ERP success requires a full lifecycle perspective to be taken by adopting companies. With lessons having been learned from the mistakes in the first project, the company in this case study revamped its ERP implementation second time out, with due consideration being given to M&S strategies and practices from project initiation onward in order to realize a stable, usable, and maintainable system. The case study explores and identifies the critical success factors (CSF) of ERP adoption, and shows that M&S must be included as a key element from the outset and throughout the system lifecycle. Our findings capture a great deal of experience for any ERP adopting companies to follow in order to avoid learning costly lessons both in implementation and subsequent M&S throughout the lifespan of the system. A set of propositions is also presented for academic researcher to consider in future ERP research endeavors. © 2009 Elsevier B.V. All rights reserved.
Schnitzler E.G.,Concordia University College of Alberta |
Schnitzler E.G.,University of Alberta |
McDonald K.M.,Concordia University College of Alberta
Atmospheric Environment | Year: 2012
Many models of secondary organic aerosol (SOA) formation, adhering to gas-particle equilibrium partitioning theory, require known vapour pressures for low volatility products of volatile organic compound (VOC) oxidation. Since the majority of such products have yet to be isolated and analysed, few experimental determinations of pertinent vapour pressures have been achieved, and models are forced to rely on vapour pressure estimates, such as those available through the common, computer-based SPARC and MPBPWIN property calculators. Thus, the accuracy of the respective estimation methods must be measured and evaluated, in order to determine the consequences in the resulting models. However, published evaluations, and most models themselves, typically focus on moderate to high ambient temperatures, which may not be applicable year-round in colder regions, where the rate of VOC oxidation slows, while the vapour pressures of the products decrease, indicating an increased tendency to condense into the aerosol phase. In this paper, the accuracy of the SPARC and MPBPWIN methods is evaluated over a broad temperature range, from 248.15 to 298.15. K, in five degree intervals using a test set of 45 compounds. The results are reported in terms of mean average error (MAE) and mean bias error (MBE), and given for alcohol, carboxylic acid, aldehyde, and ketone compound classes at each temperature. Specific trends in MAE and MBE with regard to compound class and changing temperature are discussed. More generally, the evaluation indicates that SPARC, with MAE decreasing from 0.288 at 248.15. K to 0.165 at 298.15. K and MBE increasing from -0.180 at 248.15. K to a peak of -0.081 at 293.15. K, is more accurate at low to moderate temperatures than MPBPWIN, with MAE decreasing from 0.436 at 248.15. K to 0.272 at 298.15. K and MBE increasing from -0.328 at 248.15. K to -0.213 at 298.15. K. Decreasing accuracy at lower temperatures emphasizes a need for focused experimental and model efforts in this temperature range. © 2012 Elsevier Ltd.
Young A.E.,Liberty Mutual Research Institute for Safety |
Wasiak R.,United Biosource Corporation |
Phillips L.,Concordia University College of Alberta |
Gross D.P.,University of Alberta
Pain | Year: 2011
Although various measures of low back pain (LBP) recurrence have been proposed, none have been tested to determine if they are consistent with what those with LBP perceive a "recurrence" to be. To further the understanding of LBP recurrence and how to measure it, we examined how individuals with a history of LBP describe their back pain experiences. A qualitative approach was chosen and six mixed-gender focus groups were conducted. Discussions were facilitated by two researchers and structured around predetermined questions. All four authors were involved in the data analysis and thematic congruence was achieved through an iterative process of coding and discussion. Participants included 31 individuals (14 female, 17 male), with ages ranging from early 20s to mid 70s. When asked about LBP recurrence, participants had difficulty understanding the concept. There was a sense that, although the pain may disappear, the condition was always there. Three states were defined: "normal," "flared-up," and "attack." "Normal" could include experiencing pain, but generally represented a tolerable state. "Flared-up" was associated with increased pain, the use of strategies to overcome difficulties, and modified participation. "Attack" state was described as severely disabled: "I just have to lay there." Participants described their experiences in a way that is consistent with the idea that LBP is a fluctuating and disabling health condition. Results cast doubt on the validity of currently available measures of LBP recurrence. Focusing on recurrence of pain without consideration of broader contextual factors will result in an incomplete understanding of the meaning of the pain experience. © 2010 International Association for the Study of Pain. Published by Elsevier B.V. All rights reserved.
Butakov S.,Concordia University College of Alberta
WWW 2014 Companion - Proceedings of the 23rd International Conference on World Wide Web | Year: 2014
In the era of exponentially growing web and exploding online education the problem of digital plagiarism has become one of the most burning ones in many areas. Efficient internet plagiarism detection tools should have a capacity similar to that of conventional web search engines. This requirement makes commercial plagiarism detection services expensive and therefore less accessible to smaller education institutions. This work-inprogress paper proposes the concept of crowdcrawling as a tool to distribute the most laborious part of the web search among community servers thus providing scalability and sustainability to the community driven plagiarism detection. It outlines roles for community members depending on the resources they are willing to contribute to the service. © Copyright 2014 by the International World Wide Web Conferences Steering Committee.
Butakov S.,Concordia University College of Alberta
CEUR Workshop Proceedings | Year: 2013
Data leak prevention systems become a must-have component of enterprise information security. To minimize the communication delay, these systems require fast mechanisms for massive document comparison. Bloom filters have been proven to be a fast tool for membership checkup with some allowed level of false positive errors. Taking into account specific needs of fast text comparison this paper proposes modifications to the Matrix Bloom filters. Approach proposed in this paper allows to improve density in Matrix Bloom filters with the help of special index to track documents uploaded into the system. Density is improved by combining a few documents in one line of the matrix to reduce the filter size and to address the problem of document removal. The experiment provided in the paper outlines advantages and applicability of the proposed approach. Copyright © 2013 for the individual papers by the papers' authors.
Ouellette D.,Concordia University College of Alberta
Canadian Journal of Information and Library Science | Year: 2011
This paper reports on the results of a qualitative research project that investigates how students use subject guides, and what students like and dislike about subject guides. Through in-depth interviews with 11 university students, it was found that students want subject guides that are clean and simple, and although students do not use subject guides often, they might use them more if subject guides were more specifically customized to meet their needs. In the context of designing subject guides for students, one size does not fit all, and librarians should consult with students and faculty to assess their needs and wants to create guides that are more useful, and more used. © The Canadian Journal of Information and Library Science.
Grewal Bach G.K.,Concordia University College of Alberta |
Torrealbab Y.,University of Alberta |
Lagravere M.O.,University of Alberta
Angle Orthodontist | Year: 2014
Objective: To use a systematic review to determine which materials and technique/protocol present the highest success rate in bonding brackets to porcelain surfaces. Materials and Methods: Different databases were searched without limitations up to July 2013. Additionally, the bibliographies of the finally selected articles were hand searched to identify any relevant publications that were not identified earlier. In vitro and in vivo articles were included. Results: No in vivo articles were found that fulfilled the inclusion criteria. A total of 45 in vitro articles met all inclusion criteria. They were published between 2000 to July 2013. Conclusions: The best protocol described in this review is the etching of 9.6% hydrofluoric acid for 1 minute, rinsed for 30 seconds, and then air-dried. The etching of hydrofluoric acid should be followed by an application of silane. Considering the harmful effects of etching with hydrofluoric acid, another appropriate suggestion is mechanical roughening with sandblasting followed by an application of silane. © 2014 by The EH Angle Education and Research Foundation, Inc.