Concordia University

About: Concordia University is a education organization based out in Montreal, Quebec, Canada. It is known for research contribution in the topics: Control theory & Population. The organization has 13565 authors who have published 31084 publications receiving 783525 citations. The organization is also known as: Sir George Williams University & Loyola College, Montreal.

A novel active current waveshaping technique for solid-state input power factor conditioners

Abstract: A novel input power factor correction method that uses a closed-loop active current waveshaping technique is presented. The novel feature of the method is that nearly sinusoidal input currents are obtained at constant switching frequencies. Moreover, the method exhibits instantaneous current control, which results in very fast response and increased switch reliability. Selected predicted system performance and design methods were verified experimentally on a 1 kVA laboratory prototype. >

Giant virus diversity and host interactions through global metagenomics

Abstract: Our current knowledge about nucleocytoplasmic large DNA viruses (NCLDVs) is largely derived from viral isolates that are co-cultivated with protists and algae. Here we reconstructed 2,074 NCLDV genomes from sampling sites across the globe by building on the rapidly increasing amount of publicly available metagenome data. This led to an 11-fold increase in phylogenetic diversity and a parallel 10-fold expansion in functional diversity. Analysis of 58,023 major capsid proteins from large and giant viruses using metagenomic data revealed the global distribution patterns and cosmopolitan nature of these viruses. The discovered viral genomes encoded a wide range of proteins with putative roles in photosynthesis and diverse substrate transport processes, indicating that host reprogramming is probably a common strategy in the NCLDVs. Furthermore, inferences of horizontal gene transfer connected viral lineages to diverse eukaryotic hosts. We anticipate that the global diversity of NCLDVs that we describe here will establish giant viruses-which are associated with most major eukaryotic lineages-as important players in ecosystems across Earth's biomes.

Efficient mining of constrained correlated sets

Abstract: Studies the problem of efficiently computing correlated item sets satisfying given constraints. We call them valid correlated item sets. It turns out that constraints can have subtle interactions with correlated item sets, depending on their underlying properties. We show that, in general, the set of minimal valid correlated item sets does not coincide with that of minimal correlated item sets that are valid, and we characterize classes of constraints for which these sets coincide. We delineate the meaning of these two spaces and give algorithms for computing them. We also give an analytical evaluation of their performance and validate our analysis with a detailed experimental evaluation.

Socialization Tactics and Newcomer Information Acquisition

Abstract: Research on organizational socialization has usually focused on what organizations do to socialize newcomers or on what newcomers do to socialize themselves. The purpose of this study was to integrate these two perspectives of socialization by investigating the relationships between socialization tactics, newcomers' information acquisition (i.e. feedback and observation) and socialization outcomes. Consistent with previous research, socialization tactics and information acquisition were related to socialization outcomes. Furthermore, institutionalized socialization was positively related to the frequency of newcomers' feedback and observation and the frequency of newcomers' feedback and observation was found to mediate several of the relationships between socialization tactics and outcomes. These results suggest that what newcomers can do to socialize themselves (e.g. acquire information through feedback and observation) is partly a function of what organizations do to socialize newcomers (e.g. the use of specific socialization tactics). The implications of these findings are discussed for the development of a more complete and integrated theory of organizational socialization.