1,843 results
Search Results
102. Revisiting the origins of glyphosate-resistant giant ragweed (Ambrosia trifida L.) in Canada.
- Author
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Page, Eric R., Martin, Sara, Meloche, Sydney, Thibodeau, Alyssa, Nurse, Robert E., Sikkema, Peter H., Tardif, François J., Cowbrough, Michael J., and Laforest, Martin
- Subjects
RAGWEEDS ,AMBROSIA artemisiifolia ,GLYPHOSATE ,PROLINE - Abstract
Glyphosate-resistant giant ragweed (Ambrosia trifida L.) was first identified in Canada in 2008. Although early studies attributed resistance in this species solely to non-target site mechanisms, the presence of a proline (P) to serine (S) mutation at position 106 of EPSPS2 in common and giant ragweed has recently been reported. The objective of this research was (i) to determine whether a P106S mutation is present in historical samples of giant ragweed seed collected from the site of the first report of glyphosate resistance, and (ii) to determine the frequency and distribution of P106S in resistant and susceptible biotypes collected as part of historical surveys throughout southwestern Ontario. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
103. Field testing of a physical impact mill in the Canadian Prairies.
- Author
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Tidemann, Breanne D., Harker, K. Neil, Beckie, Hugh J., Kubota, Hiroshi, Zuidhof, Jennifer, and Reid, Patty
- Subjects
HERBICIDE resistance ,WEED control ,SEED harvesting ,WEED seeds ,PRAIRIES ,WEEDS - Abstract
Herbicide resistance in western Canada has increased interest in alternative weed management strategies. Physical impact mills, a form of harvest weed seed control, have been identified as a strategy that may be well suited for Canadian use. The efficacy of the Harrington Seed Destructor, a physical impact mill, was evaluated in 20 producer fields in Alberta on a wide spectrum of weed species over 3 years. Significant differences in weed densities between the physical impact mill treatment and the regular harvest densities were few; however, some population density reductions were observed. Measurable reductions in weed densities may have been limited by the short timeframe of the experiment, the high initial densities of the weeds, or the targeted weed species having dormancy or longer term seedbanks. Additionally, identified knowledge gaps on how best to optimize physical impact mill efficacy may have reduced the efficacy of the physical impact mill in this study. This study showed no conclusive evidence for the efficacy of a physical impact mill on tested weed species under field conditions. However, it did provide a number of important considerations for future studies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
104. Genetic variation in growth and leaf traits associated with local adaptation to climate in yellow birch (Betula alleghaniensis Britton).
- Author
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Maloney, A., Dang, Q.L., Godakanda, P.M., and Thomson, A.
- Subjects
CLIMATE change adaptation ,BIRCH ,LEAF growth ,GENETIC variation ,CARBON isotopes - Abstract
Understanding patterns of variation in functional traits of hardwood trees is crucial for conserving and managing North American temperate forests under climate change. This study examined provenance variation of yellow birch (Betula alleghaniensis Britton) in growth, biomass allocation, leaf morphology, and stable carbon isotope composition. Trees were grown from 10 seed sources originating from across Canada and the northern USA. Height and diameter were not significantly related to climate at seed origin, suggesting that variation may be better explained by site factors, such as soil pH and soil moisture. In contrast, carbon isotope composition and leaf morphological traits were significantly correlated to climate variables including temperature, precipitation, and solar radiation. Provenances from warmer, drier localities tended to have higher stable carbon isotope ratio (δ
13 C), greater specific leaf area, and narrower leaf width than their counterparts from cooler, wetter climates. Thus, variation in leaf morphological traits appears to be involved in adaptation of yellow birch to variation in temperature and moisture availability across the species' range. Our results suggest that there may exist potential for selection and breeding of drought-resistant yellow birch genotypes to aid in reforestation under climate change. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
105. Assessing future climate trends and implications for managed forests across Canadian ecozones.
- Author
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Wotherspoon, A.R., Achim, A., and Coops, N.C.
- Subjects
ECOLOGICAL zones ,FORESTS & forestry ,FOREST dynamics ,TREE growth ,BIOMES ,COASTAL forests ,LANDSLIDES - Abstract
Climate change interacts with ecological processes leading to changes in tree and forest growth rate, biome shifts and species composition, all of which are influenced by disturbances. This study explores future overarching climate trends of eight of Canada's ecozones containing managed forests. For the 2071 to 2100 period, climate projections indicate a warming trend of up to an additional 5.5 °C and an overall increase in annual precipitation. Future trends suggest marked contrast between coastal and interior forests and polarization between western and eastern forests. Warmer temperatures, accumulating degree-days above 5 °C and frost-free days suggest longer and drier growing seasons and greater risk of drought particularly in moisture-limited areas such as montane cordillera, taiga shield and boreal shield ecozones. Warmer temperatures and rising precipitation combined with less snow suggest shorter and wetter future winters. This indicates greater risk of rain-on-snow and freeze-thaw events, flooding and landslides particularly in coastal ecozones. We discuss how these projections are likely to result in shifts in dominant species and abundance, which when coupled with the cumulative effects of future disturbances, is likely to alter future forest dynamics and impact harvestable wood volumes for Canada's forestry industry. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
106. Sugar maple sap, soil, and foliar chemistry in response to non-industrial wood ash fertilizer in Muskoka, Ontario.
- Author
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Conquer, Shelby M., Yan, Norman D., and Watmough, Shaun A.
- Subjects
WOOD ash ,SUGAR maple ,MAPLE syrup ,FOREST soils ,SOIL horizons - Abstract
Non-industrial wood ash may be an effective forest soil nutrient supplement but its use in Canada is largely restricted because of unknown concentrations of trace metal contaminants. Sugar maple (Acer saccharum Marshall) is particularly sensitive to low soil calcium (Ca) levels, and though maple syrup is of great economic importance in Canada, it is unknown how wood ash could affect sap chemistry. Non-industrial wood ash (NIWA; 6 Mg·ha
−1 ) applied to experimental plots in Muskoka, Ontario was rich in Ca (27%), while metal concentrations were well below provincial regulatory limits. One-year post-application, significant increases were observed in the treated plots in the soil pH and base cations (Ca, K, and Mg) in the surface soil horizons, and metal concentrations in the litter. Sap yield in the control plots was significantly lower in the first-year post-application than in the second year, but no other differences were found. In both tapping years, sap sweetness remained similar and differences in nutrient and metal concentrations between treatments were generally small and inconsistent. Foliar chemistry remained largely unchanged 1 year following application, except for K that was twice as high in the treated plots. Ultimately, NIWA is unlikely to significantly alter sugar maple sap chemistry, indicating that it is a viable nutrient supplement that can enhance soil fertility in sugar bushes with no impact on sap sweetness. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
107. Tillage effects on growing season nitrous oxide emissions in Canadian cropland soils.
- Author
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Pelster, David E., Matteau, Jean-Pascal, Farrell, Richard, and Hernandez Ramirez, Guillermo
- Subjects
GREENHOUSE gases ,GROWING season ,NITROUS oxide ,TILLAGE ,GREENHOUSE gas mitigation ,TUNDRAS - Abstract
Minimizing tillage has been promoted as an agricultural practice that may mitigate greenhouse gas emissions through carbon sequestration. However, there is some ambiguity regarding the effect of minimum tillage (MT) on emissions of other greenhouse gases, in particular soil nitrous oxide (N
2 O) emissions. To determine how effective MT could be in helping Canada mitigate greenhouse gas emissions, we used a meta-analysis to compare growing season N2 O emissions from MT versus conventional tillage (CT). Overall, MT had 12% lower N2 O emissions compared to CT (P = 0.03). However, there was high variability due to soil texture and growing season precipitation (GSP), with MT tending to emit more N2 O than CT in climates where GSP exceeded 600 mm, particularly for soils with sand content less than 60%. Therefore, unless long-term tillage trials, which are urgently needed in eastern Canada, show a reduction in N2 O emissions over time, MT should be used as a greenhouse gas mitigation measure only in dry climates or on sandy soils. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
108. Crop yields under no-till in Canada: implications for soil organic carbon change.
- Author
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VandenBygaart, A.J. and Liang, B.C.
- Subjects
NO-tillage ,CROP yields ,GREENHOUSE gases ,CARBON in soils ,SOIL classification ,SOIL texture - Abstract
Crop yields directly affect carbon (C) inputs into soils. Tillage management can influence crop performance, and as such should be considered when quantifying soil organic carbon (SOC) change, and thus net greenhouse gas emissions from croplands for national greenhouse gas inventory reporting. We conducted a meta-analysis of the effects of no-tillage (NT) and conventional tillage (CT) on crop yields for multiple crop species, soil types, and climatic regions of Canada. Yield response to NT varied between western and eastern Canada. Regardless of crop type, experiment duration, soil texture, and residue management, experiments in eastern Canada showed an average of 6% lower yields (p ≤ 0.005) under NT compared to CT. In western Canada, crop type had an important effect on yields between NT and CT with wheat, canola, and legumes exhibiting 10% (p ≤ 0.001), 7% (p ≤ 0.05), and 9% (p ≤ 0.05) higher yields on average under NT compared to CT, respectively. In western Canada, higher yields would be reflected in a similar scale of higher C inputs to NT systems. A recent meta-analysis of the effects of tillage management on SOC in Canada showed an 8% higher storage of SOC under NT systems compared to CT, a difference limited to western Canadian soils. Incorporating the effect of tillage on C inputs will lead to improvements in the accuracy of the effects of tillage management on SOC change in Canadian cropland. The activity data can be improved by applying weightings to the yield data by site-specific assessment of tillage practices across Canada. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
109. An economic review of conservation tillage practices: select case studies from the eastern Prairies of Canada.
- Author
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Khakbazan, M., Carew, R., Crittenden, S., Mohr, R.M., and Biswas, D.K.
- Subjects
NO-tillage ,CONSERVATION tillage ,CANOLA ,CLAY loam soils ,SOIL conservation ,WHEAT ,LOAM soils - Abstract
This study reviewed the literature on soil conservation practices and analyzed four case studies in different soil zones and diverse cropping systems of Manitoba (MB), western Canada, to show the potential impacts of no-till/reduced tillage practices on field crop economic performance. Primary and secondary data, such as tillage type, input cost, crop price, crop yield, and net revenue (NR), were used to assess the tillage practices in each of the case studies. Based on crop economic analysis, over 9 years (1998–2006) in southern Manitoba, cereal-based (spring wheat (Triticum aestivum L.) and barley (Hordeum vulgareL.)) cropping systems were more profitable under conservation tillage than conventional tillage practices, whereas the opposite was true for oilseed crops (e.g., canola, Brassica napus L.). In plot-scale studies at Portage, MB, low intensity tillage increased NR for soybean (Glycine max L.) in 1 of 3 years when compared to high intensity tillage, and there appeared to be lower NRs for canola as tillage intensity increased. However, in studies near Brandon, MB, NRs for a 4-year wheat-pea (Pisum sativum L.) rotation were lower in low disturbance seeding than high disturbance seeding systems for a clay loam soil but similar for a loam soil. While no single tillage system was found to consistently provide the highest NR based on these case studies, these findings provide insights into some of the factors behind decisions surrounding tillage management and the rationale for the continued use of a combination of conventional, reduced, and zero-till systems in the eastern Prairies of Canada. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
110. Stability of mine development intersections - a probabilistic analysis approach.
- Author
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Abdellah, Wael, Mitri, Hani S., Thibodeau, Denis, and Moreau-Verlaan, Lindsay
- Subjects
FIX-point estimation ,MINING methodology ,MINING engineering ,STABILITY (Mechanics) ,ROCK mechanics ,ORE deposits ,PROBABILITY theory - Abstract
Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2014
- Full Text
- View/download PDF
111. Impacts and prognosis of natural resource development on aquatic biodiversity in Canada's boreal zone1.
- Author
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Kreutzweiser, David, Beall, Frederick, Webster, Kara, Thompson, Dean, and Creed, Irena
- Subjects
CONSERVATION of natural resources ,AQUATIC biodiversity ,TAIGAS ,FORESTS & forestry ,WATERSHEDS ,FOREST management - Abstract
Copyright of Environmental Reviews is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2013
- Full Text
- View/download PDF
112. Concrete in Canada: 50 years of progress - present concerns.
- Author
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Aïtcin, Pierre-Claude, Wilson, William, and Mindess, Sidney
- Subjects
HIGH strength concrete ,PLASTICIZERS ,SILICA fume ,SUSTAINABILITY ,CONCRETE research - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
- View/download PDF
113. Climate change and Canada's north coast: research trends, progress, and future directions.
- Author
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Ford, James D., Couture, Nicole, Bell, Trevor, and Clark, Dylan G.
- Subjects
CLIMATE change ,COASTS ,SEA ice ,STORMS ,METEOROLOGICAL precipitation - Abstract
Copyright of Environmental Reviews is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
- View/download PDF
114. Innovation and value creation in university-industry research centres in the Canadian forest products industry.
- Subjects
ACADEMIC-industrial collaboration ,RESEARCH institutes ,FOREST products industry ,RESEARCH funding ,MANAGEMENT - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
- Full Text
- View/download PDF
115. An investigation on Ontario's non-hazardous municipal solid waste diversion using trend analysis.
- Author
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Chowdhury, Asma, Vu, Hoang Lan, Ng, Kelvin T.W., Richter, Amy, and Bruce, Nathan
- Subjects
WASTE management ,WASTE minimization ,WASTE recycling ,SOLID waste ,WASTE products management - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
116. Canadian main track derailment trends, 2001 to 2014.
- Author
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Leishman, Eric M., Hendry, Michael T., and Martin, C. Derek
- Subjects
RAILROAD accidents ,RAILROADS ,HAZARDOUS substance transportation accidents ,RAILROAD tracks ,SPEED of railroad trains - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
117. British Columbia Smart Infrastructure Monitoring System.
- Author
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Kaya, Yavuz, Ventura, Carlos, Huffman, Sharlie, and Turek, Martin
- Subjects
INFRASTRUCTURE (Economics) ,SEISMOMETERS ,REAL-time computing - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
118. Infrastructure crisis - a proposed national infrastructure policy for Canada.
- Author
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Mirza, Saeed and Ali, M. Shafqat
- Subjects
INFRASTRUCTURE (Economics) ,DETERIORATION of buildings ,MUNICIPAL services ,INFRASTRUCTURE policy - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
119. Development of an internal benchmarking and metrics model for industrial construction enterprises for productivity improvement.
- Author
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Zhang, Di, Nasir, Hassan, and Haas, Carl T.
- Subjects
CONSTRUCTION industry ,PRODUCTION (Economic theory) ,BENCHMARKING (Management) ,LABOR productivity ,GROSS domestic product - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
120. Novel case-control observational method for assessing effectiveness of red-light cameras.
- Author
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Abdulsalam, Amal Jasem, Rowlands, Dane, Easa, Said M., and Abd El Halim, Abd El Halim O.
- Subjects
TRAFFIC accident statistics ,TRAFFIC safety ,TRAFFIC regulations ,PROPENSITY score matching ,EMPIRICAL Bayes methods - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
121. Direct and indirect estimates of the productive capacity of fish habitat under Canada's Policy for the Management of Fish Habitat: where have we been, where are we now, and where are we going?
- Author
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Minns, Charles K., Randall, Robert G., Smokorowski, Karen E., Clarke, Keith D., Vélez-Espino, Antonio, Gregory, Robert S., Courtenay, Simon, LeBlanc, Patrice, and Sprules, Gary
- Subjects
HABITATS ,FISHERY management ,FISH habitats ,BIOTIC communities ,GOVERNMENT policy ,MANAGEMENT - Abstract
Copyright of Canadian Journal of Fisheries & Aquatic Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2011
- Full Text
- View/download PDF
122. Circular precast concrete manholes: numerical modeling.
- Author
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Sabouni, Reem and El Naggar, M.H.
- Subjects
MANHOLES ,PRECAST concrete construction ,MATHEMATICAL models ,WATER table ,SOIL-structure interaction ,BENDING moment ,FINITE element method ,STRAINS & stresses (Mechanics) - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2011
- Full Text
- View/download PDF
123. Floor response spectra for seismic design of operational and functional components of concrete buildings in Canada.
- Author
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Shooshtari, M., Saatcioglu, M., Naumoski, N., and Foo, S.
- Subjects
CONCRETE construction ,EARTHQUAKE damage ,CONSTRUCTION ,FLOORING ,EARTHQUAKE resistant design ,COMPUTER simulation - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2010
- Full Text
- View/download PDF
124. A review of 41 legal cases involving geotechnical practice in Canada.
- Author
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Abdulahad, Suhail, Jergeas, George, and Ruwanpura, Janaka
- Subjects
ROCK mechanics ,SOIL conditioners ,BIDDING strategies ,INFORMATION theory ,SOIL testing - Abstract
Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2010
- Full Text
- View/download PDF
125. Evolution of seismic design provisions in the National building code of Canada.
- Author
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Mitchell, Denis, Paultre, Patrick, Tinawi, René, Saatcioglu, Murat, Tremblay, Robert, Elwood, Kenneth, Adams, John, and DeVall, Ronald
- Subjects
EARTHQUAKE resistant design ,CONSTRUCTION ,ENGINEERING standards ,VIBRATION (Mechanics) ,SHEAR (Mechanics) ,REINFORCED concrete buildings - Abstract
The purpose of this paper is to provide a summary of the evolution of seismic design in Canada. This paper presents the significant changes to the approach taken in determining seismic hazards and seismic hazard maps, and describes the evolution of the seismic design provisions of the National building code of Canada. The introduction of important parameters in determining the seismic base shear such as the period of vibration of the structure, the influence of type of soil, and the concepts of ductility and energy dissipation capacity of elements and structures are presented. The levels of seismic design base shears, determined from different versions of the National Building Code of Canada, are compared for reinforced concrete frame and wall structures to illustrate the changes. L'objectif de cet article est de présenter un sommaire de l'évolution de la conception parasismique au Canada en se référant aux modifications des efforts sismiques prescrits par le Code National du Bâtiment du Canada. Les changements majeurs concernant l'aléa sismique et les cartes sismiques correspondantes qui ont été créées sont présentés. On présente également les paramètres importants, qui influencent le calcul sismique de l'effort tranchant à la base, tels que la période de la structure, l'influence du type de sols, les concepts de ductilité et de dissipation d'énergie. La variabilité du niveau des charges sismiques, pour les différentes versions du Code National du Bâtiment du Canada, est présentée pour les cadres en béton et les refends, afin d'illustrer ces changements. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
126. Experimental evaluation of remaining strength of crossarms in Gulfport transmission line wood structures.
- Author
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Pandey, M. D., Ho, V., McCarthy, F., and Woodward, S. B.
- Subjects
ELECTRIC lines ,ELECTRICAL conductors ,ELECTRIC industries ,ECONOMIC life of fixed assets ,RELIABILITY in engineering - Abstract
Electrical transmission lines in Canada and elsewhere widely utilize wood structures to support electrical conductors. The Gulfport structure is one of the largest wooden structures used in Canada’s electricity transmission networks. Continuous exposure of crossarms to wide-ranging temperature, moisture, and load conditions makes them vulnerable to internal decay and failure under adverse weather conditions, such as windstorms and snowstorms. These failures can result in forced outages and customer disruptions with significant economic losses, and therefore the electrical utility industry has taken a keen interest in developing condition-assessment methods to support cost-effective replacement of aged wood crossarms. At present, there is no dataset available regarding the remaining strength of wood pole crossarms exposed to the aboveground environment for 30-40 years of service life in Canada. This paper presents a comprehensive experimental study focussed on evaluating the remaining strength distribution in a sample of crossarms removed from service. The experimental data presented in the paper are essential to assess remaining life and develop guidelines for condition assessment of crossarms. Les lignes de transport d’électricité au Canada et ailleurs utilisent beaucoup les structures de bois pour soutenir les conducteurs électriques. La structure Gulf Port est l’une des plus grandes structures de bois utilisées dans les réseaux de transport d’électricité au Canada. L’exposition perpétuelle des traverses de poteaux à une large gamme de température, d’humidité et de charge, les rendant vulnérables à la pourriture interne et à la défaillance sous diverses conditions climatiques, tels que des tempêtes de vent et de neige. Ces défaillances peuvent engendrer des indisponibilités fortuites et des pannes de courant chez les usagers, impliquant de fortes pertes financières. L’industrie des services électriques a donc montré un intérêt à développer des méthodes d’évaluation des conditions afin de soutenir le remplacement rentable des vielles traverses de poteaux en bois. Présentement, aucun ensemble de données n’est disponible concernant la résistance résiduelle des traverses en bois des poteaux exposés aux conditions environnementales au-dessus du sol pendant 30 à 40 ans au Canada. Le présent article porte sur une étude expérimentale complète portant sur l’évaluation de la distribution de la résistance résiduelle dans un échantillon de traverses de poteaux retirées du service. Les données expérimentales présentées dans cet article sont primordiales pour évaluer la durée de vie restante et mettre sur pied des directives pour l’évaluation de l’état des traverses de poteaux. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
127. Moving forward by looking back: lessons learned from long-lost lifestyles.
- Author
-
Tremblay, Mark S., Esliger, Dale W., Copeland, Jennifer L., Barnes, Joel D., and Bassett Jr., David R.
- Subjects
CHILDREN'S health ,PHYSICAL fitness for children ,PREVENTION of childhood obesity ,LIFESTYLES ,AMISH children ,MENNONITE children - Abstract
The paper briefly reviews the status and trends in physical activity, physical inactivity, and overweight/obesity in Canada; discusses the consequences of these trends; examines evidence that our frame of reference with respect to physical activity and obesity is changing; promotes the importance of getting “back to the basics” as a strategy for enhancing childhood physical activity; and provides suggestions for future research in this area. In addressing these topics, the paper explores and contrasts the lifestyles and characteristics of Old Order Amish and Old Order Mennonite children with children exposed to contemporary modern living. This exploration is used as a model to learn from traditional lifestyles, which were comparatively active and resistant to obesity. The fitness characteristics and physical activity levels of traditional and contemporary groups are compared and demonstrate significant differences among groups. This evidence may provide important insight for informing future physical activity recommendations. Idiosyncrasies of performing research on these traditional-living groups are also provided. Cet article présente brièvement les niveaux de pratique et les tendances au sujet de l’activité physique, de l’inactivité physique, du surpoids et de l’obésité au Canada. Par la suite, on analyse les conséquences et scrute les faits à l’appui du changement du cadre de référence concernant l’activité physique et l’obésité ; puis on insiste sur l’importance de revenir à la base pour inciter les jeunes à la pratique de l’activité physique et on propose des pistes de recherche dans ce domaine. De plus, cet article analyse et compare sous l’angle de ces thèmes les modes de vie des enfants de la société moderne à ceux des enfants du Vieil Ordre Amish et du Vieil Ordre Mennonite. Cette analyse constitue un modèle d’étude du mode de vie traditionnelle caractérisée par sa plus grande pratique de l’activité physique et par sa résistance à l’obésité. Cet article compare la condition physique et le niveau de pratique de l’activité physique selon ces modes de vie et constate des différences significatives. Ces observations pourraient fournir les arguments nécessaires en faveur de recommandations prochaines en matière d’activité physique. Finalement, cet article présente une approche idiosyncratique de la recherche sur ces modes de vie traditionnelle. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
128. Application of lean thinking to improve the productivity of water and sewer service installations.
- Author
-
Kung, Dale, Alex, Dinu Philip, Al-Hussein, Mohamed, and Fernando, Siri
- Subjects
INSTALLATION of industrial equipment ,CONSTRUCTION projects ,WATER supply management ,WATER supply equipment industry ,SEWERAGE ,INDUSTRIAL productivity ,METROPOLITAN areas ,QUEUING theory ,EQUIPMENT & supplies - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2008
- Full Text
- View/download PDF
129. Plants and habitats — a consideration of Dene ethnoecology in northwestern Canada.
- Author
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Main Johnson, Leslie
- Subjects
PLANT habitats ,HABITATS ,ECOLOGY ,BOTANY ,PLANTS ,ENVIRONMENTAL sciences - Abstract
Copyright of Botany is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2008
- Full Text
- View/download PDF
130. Proposals for limit states torsional strength design of wide-flange steel members.
- Author
-
Ashkinadze, Konstantin
- Subjects
PIPE flanges ,TORSION ,TECHNICAL specifications ,FINITE element method ,ENGINEERING models ,ENGINEERING design ,SCIENTIFIC method ,MATHEMATICAL analysis - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2008
- Full Text
- View/download PDF
131. Poplar research in Canada — a historical perspective with a view to the future.
- Author
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Richardson, J., Cooke, J. E.K., Isebrands, J. G., Thomas, B. R., and Van Rees, K. C.J.
- Subjects
POPLARS ,PLANTS ,HISTORY of research ,GENOMICS - Abstract
Copyright of Canadian Journal of Botany is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2007
- Full Text
- View/download PDF
132. Assessing the mechanical stability of horizontal boreholes in coal.
- Author
-
Hawkes, C. D.
- Subjects
METHANE ,DRILLING & boring ,COAL ,COAL reserves ,BOREHOLE mining ,PETROLEUM industry ,MINERAL industries - Abstract
Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2007
- Full Text
- View/download PDF
133. Trends in physical activity research in Canada.
- Author
-
Herman, Katya M., Ardern, Chris I., Mason, Caitlin, Brien, Susan E., and Katzmarzyk, Peter T.
- Subjects
PHYSICAL fitness ,EXERCISE ,HEALTH ,PHYSICAL education - Abstract
Copyright of Applied Physiology, Nutrition & Metabolism is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2007
- Full Text
- View/download PDF
134. First ISIS Canada pedestrian bridge: student design perspective.
- Author
-
El-Hacha, R., Bisby, L., Williams, B., Tung, D., and Ford, J.
- Subjects
CONTESTS ,ENGINEERING design ,ENGINEERING students ,SKYWALK design & construction ,FIBER-reinforced concrete - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2007
- Full Text
- View/download PDF
135. The influence of facing stiffness on the performance of two geosynthetic reinforced soil retaining walls.
- Author
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Bathurst, Richard J, Vlachopoulos, Nicholas, Walters, Dave L, Burgess, Peter G, and Allen, Tony M
- Subjects
RETAINING wall design & construction ,EARTHWORK ,EARTH pressure ,CIVIL engineering ,ROYAL Military College of Canada (Kingston, Ont.) - Abstract
Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2006
- Full Text
- View/download PDF
136. Development of the 2004 Canadian Standards Association (CSA) A23.3 shear provisions for reinforced concrete.
- Author
-
Bentz, Evan C. and Collins, Michael P.
- Subjects
STRUCTURAL design ,SHEAR walls ,STANDARDS ,ENGINEERING design ,ASSOCIATIONS, institutions, etc. ,REINFORCED concrete - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2006
- Full Text
- View/download PDF
137. Reply to the comment by Bailey et al. on "Long-term decline of sugar maple following forest harvest, Hubbard Brook Experimental Forest, New Hampshire"1.
- Author
-
Battles, John J., Cleavitt, Natalie L., Johnson, Chris E., and Fahey, Timothy J.
- Subjects
LOGGING ,SUGAR maple ,MAPLE ,RIVERS ,MOUNTAIN forests ,FOREST reserves - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
138. Participatory decision support for sustainable forest management: a framework for planning with local communities at the landscape level in Canada.
- Author
-
Sheppard, Stephen R. J.
- Subjects
SUSTAINABLE forestry ,FOREST management ,DECISION making ,SOCIAL support ,FORESTS & forestry - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2005
- Full Text
- View/download PDF
139. Development of a condition assessment model for transmission line in-service wood crossarms.
- Author
-
Pandey, M. D., Ho, V., Bedi, S., and Woodward, S. B.
- Subjects
ELECTRIC lines ,WOOD ,ENGINEERING inspection ,QUALITY standards - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2005
- Full Text
- View/download PDF
140. Decision support for sustainable development using a Canadian economic input–output life cycle assessment model.
- Author
-
Bjorn, Andrew, Declercq-Lopez, Laura, Spatari, Sabrina, and MacLean, Heather L.
- Subjects
SUSTAINABLE development ,DECISION support systems ,DECISION making ,LIFE cycle costing ,CANADIAN economy - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2005
- Full Text
- View/download PDF
141. A method-based survey of life cycle costing literature pertinent to infrastructure design and renewal.
- Author
-
Christensen, Paul N., Sparks, Gordon A., and Kostuk, Kent J.
- Subjects
INFRASTRUCTURE (Economics) ,LIFE cycle costing ,INDUSTRIAL costs ,PRODUCT life cycle - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2005
- Full Text
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142. Chronic obstructive pulmonary disease: a novel risk factor for cardiovascular disease.
- Author
-
Sin, Don D. and Man, S. F. Paul
- Subjects
OBSTRUCTIVE lung diseases ,DISEASES ,MORTALITY ,ETIOLOGY of diseases ,CANADIANS - Abstract
Copyright of Canadian Journal of Physiology & Pharmacology is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2005
- Full Text
- View/download PDF
143. The Potsdam–Beekmantown Group boundary, Nepean Formation type section (Ottawa, Ontario): a cryptic sequence boundary, not a conformable transition.
- Author
-
Dix, George R., Hersi, Osman Salad, and Nowlan, Godfrey S.
- Subjects
SEDIMENTATION & deposition ,GEOLOGY ,CAMBRIAN paleoecology ,EARTH sciences - Abstract
Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2004
- Full Text
- View/download PDF
144. Development of a unique deterioration index, prioritization methodology, and foreign object damage evaluation models for Canadian airfield pavement management.
- Author
-
Shah, Anwar, Tighe, Susan, and Stewart, Allen
- Subjects
PERFORMANCE of pavements ,AIRPORTS ,DETERIORATION of concrete ,PAVEMENTS - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2004
- Full Text
- View/download PDF
145. Landscape evolution and human occupation during the Archaic period on the northern Plains.
- Author
-
Oetelaar, Gerald A.
- Subjects
ARCHAEOLOGICAL excavations ,RADIOCARBON dating ,HISTORIC sites ,SEDIMENTS - Abstract
Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2004
- Full Text
- View/download PDF
146. Assessment of interspecific competition using relative height and distance indices in an age sequence of seral interior cedar–hemlock forests in British Columbia.
- Author
-
Simard, Suzanne W. and Sachs, Donald L.
- Subjects
CEDAR ,TSUGA ,TREES ,AGE of plants - Abstract
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2004
- Full Text
- View/download PDF
147. Proposed Canadian automated highway system architecture: object-oriented approach.
- Author
-
Al-Qaysi, Qoutaiba, Easa, Said M., and Ali, Nouman
- Subjects
HIGHWAY engineering ,ROAD construction ,ARCHITECTURE ,CIVIL engineering - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2003
- Full Text
- View/download PDF
148. Probabilistic model of combined wind and ice loads on overhead power line conductors.
- Author
-
Savadjiev, Konstantin and Farzaneh, Masoud
- Subjects
ELECTRIC lines ,WIND speed ,ICE ,ELECTRIC power failures - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2003
- Full Text
- View/download PDF
149. Characteristics of ice in the St. Lawrence River.
- Author
-
Morse, Brian, Hessami, Masoud, and Bourel, Céline
- Subjects
ICE ,FUZZY logic ,DOPPLER effect - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2003
- Full Text
- View/download PDF
150. A framework to proactively consider road safety within the road planning process.
- Author
-
de Leur, Paul and Sayed, Tarek
- Subjects
HIGHWAY planning ,TRAFFIC safety ,ROADS ,LOGISTICS - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2003
- Full Text
- View/download PDF
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