Time filter

Source Type

Burnaby, Canada

Jaggernauth C.,8888 University Drive
Intelligent Systems Reference Library | Year: 2014

With the projected rise in the senior population, the use of biomedical devices play an indispensable role in the monitoring of the elderly, for staving off the onset of complications as well as providing peace of mind for family members and relief for care-givers. This chapter examines the modeling of the social aspect of biomedical device manufacturing in a lean manufacturing environment. The social aspect includes customer satisfaction with the product as it relates to increased sales. The type of modeling used is fuzzy cognitive. © Springer International Publishing Switzerland 2014.

Araujo H.A.,Canadian Department of Fisheries and Oceans | Cooper A.B.,Simon Fraser University | MacIsaac E.A.,8888 University Drive | Knowler D.,Simon Fraser University | Velez-Espino A.,Canadian Department of Fisheries and Oceans
Theoretical Population Biology | Year: 2015

This study develops a quantitative framework for estimating the effects of extreme suspended-sediment events (SSC>25mgL-1) on virtual populations of Chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon in a coastal watershed of British Columbia, Canada. We used a life history model coupled with a dose-response model to evaluate the populations' responses to a set of simulated suspended sediments scenarios. Our results indicate that a linear increase in SSC produces non-linear declining trajectories in both Chinook and coho populations, but this decline was more evident for Chinook salmon despite their shorter fresh-water residence. The model presented here can provide insights into SSC impacts on population responses of salmonids and potentially assist resource managers when planning conservation or remediation strategies. © 2015 Elsevier Inc.

Berenbrink P.,8888 University Drive | Elsasser R.,University of Salzburg | Sauerwald T.,University of Cambridge
Algorithmica | Year: 2015

We consider rumor spreading on random graphs and hypercubes in the quasirandom phone call model. In this model, every node has a list of neighbors whose order is specified by an adversary. In step i every node opens a channel to its ith neighbor (modulo degree) on that list, beginning from a randomly chosen starting position. Then, the channels can be used for bi-directional communication in that step. The goal is to spread a message efficiently to all nodes of the graph.For random graphs (with sufficiently many edges) we present an address-oblivious algorithm with runtime O(logn) that uses at most O(nloglogn) message transmissions. For hypercubes of dimension logn we present an address-oblivious algorithm with runtime O(logn) that uses at most O(n(loglogn)2) message transmissions.Together with a result of Elsässer (Proc. of SPAA’06, pp. 148–157, 2006), our results imply that for random graphs the communication complexity of the quasirandom phone call model is significantly smaller than that of the standard phone call model. © 2014, Springer Science+Business Media New York.

Araujo H.A.,Simon Fraser University | Page A.,Simon Fraser University | Cooper A.B.,Simon Fraser University | Venditti J.,Simon Fraser University | And 3 more authors.
Hydrological Processes | Year: 2014

Erosion from logging road surfaces, cut slopes, banks, and ditches represents a chronic source of sediment input to streams that can degrade aquatic habitats. Road surface erosion is of particular concern because the magnitude of sediment generation when traffic levels are high can be large. Current models for predicting sediment production from roads require information on area-specific sediment delivery, which is not often available. Here, we developed a model to quantify suspended sediment concentrations (SSC) generated by forest roads surfaces under different conditions of use and density. This model is designed for a typical medium-size coastal watershed of British Columbia or the American Pacific Northwest, and was applied to the Chilliwack River watershed as a case study. The results illustrate that intensive use of forest roads combined with high road density can increase the number of extreme sedimentation events over a predetermined threshold. A comparison of the effects of road density and the level of road use suggests that the level of road use is more important than the road density for the generation of fine sediment from road surfaces. However, the model omits the impact of roads on mass movements in a watershed, which represent a major source of sediment in steep watersheds, so the effect of road density is likely more substantial than the model predicts. The model is an attempt to overcome field data limitations by using an empirical relation between SSC and traffic variables, and presents a starting point for more intensive field studies that could be used to validate it. © 2013 John Wiley & Sons, Ltd.

Jackson M.,Culex Environmental | Howay T.,Culex Environmental | Belton P.,8888 University Drive
Canadian Entomologist | Year: 2013

Using a Center for Disease Control light trap Culiseta particeps (Adams) (Diptera: Culicidae) was collected on four occasions during the spring and summer of 2011. In addition, on 15 April 2011 a pupa was collected from a semi-permanent pool, reared to the adult stage and identified as C. particeps. The collection and identification of these mosquitoes marks the first time C. particeps has been reported in Canada. As there have been specimens identified in both the southwest coast of Alaska, United States of America and northwestern Washington State, United States of America, it is unsurprising that British Columbia, Canada is part of the natural habitat range of C. particeps. Copyright © 2013 Entomological Society of Canada.

Discover hidden collaborations