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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd.
    Fatigue & fracture of engineering materials & structures 21 (1998), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Stress-corrosion cracking (SCC) involves the interaction between stress and the environment to cause cracking in situations where if present independently their effect would be benign. SCC involves mechanics through the role of stress and the material through its interaction with the environment. SCC has occurred in many engineering structures, generally without expectation that a specific combination of material and environment would produce such cracking. This paper discusses SCC and the development of models to quantify its effect on the life of structures—outlining both the approach and inherent complications due to the coupled mechanics and materials issues. This development is illustrated with reference to characterizing the initiation and early growth of SCC as it occurs on gas-transmission pipelines. The discussion closes with consideration of failure criteria for use in this application, which involves the coalescence of several cracks with the rather complex patches of cracks that occur with SCC in this application. Areas needing further attention are identified.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2012-04-01
    Description: Understanding perceptions of risks, awareness, and trust in management agencies is critical to effective management of large-scale forest insect disturbance. In this study, we examined regional variation in public perceptions of risk, compared public and land managers’ perceptions, and examined knowledge and trust as factors in shaping public perceptions of a mountain pine beetle (MPB) ( Dendroctonus ponderosae Hopkins) infestation. Survey data were collected from residents (n = 1303) in three regions of Alberta and from land managers (n = 43) responsible for MPB management. Results showed that residents had moderate or great concern for MBP risks, they were not well informed about MPB, and they showed slight trust in the provincial government and forest industry to manage the beetle. There was regional variation in perceptions of risks, knowledge, and trust. Land managers were less concerned about nontimber effects and had higher trust than the public. A positive correlation between trust and risk perceptions appears to contradict the risk literature. This relationship may be influenced by an intervening effect of knowledge. These results call for more attention to the content of risk messaging and the effects of trust and knowledge on the general public who take up these messages.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 3
    Publication Date: 2020-11-01
    Description: Researchers and advocates have long argued that on-going engagement by broad segments of the public can help make forests and forest-based communities more sustainable and decisions more enduring. In Canada, public engagement in sustainable forest management has primarily taken one of two approaches: advisory forums through forest-sector advisory committees (FACs) and direct decision-making authority through community forest boards (CFBs). The purpose of this paper is to compare these two approaches by focusing on who participates and the values that participants bring to their deliberations. We conducted a national survey of FACs and CFBs involving 402 participants. Results showed that both models favoured well-educated, Caucasian men and fell short on the representation of women and Indigenous peoples. Additionally, despite different levels of authority in relation to forest management decisions, participants in CFBs and FACs shared similar forest values. Hence, we conclude that neither model of forest governance encourages participation from a diverse public. Our findings suggest the need to find new ways of recruiting diverse participants and to investigate more deeply whether local and extra-local pressures and power dynamics shape these processes. Such information can inform the establishment of more robust institutions for decision-making in support of sustainable forest management.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 4
    Publication Date: 2019-04-01
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 5
    Publication Date: 2016-01-01
    Description: The media play a key role in communicating risk issues and serve as a link between experts and the public. In this study, we explore experts’ perspectives on the role of the media and media content with respect to a mountain pine beetle (MBP; Dendroctonus ponderosae Hopkins) epidemic in western Canada. We collected data using an internet-based survey of 59 MPB experts in 2009 and 1628 articles from local, regional, and national newspapers from 2000 to 2008. Survey findings show that experts do not have a favourable view of media reporting of MPB. In our media analysis, we found that the media are used effectively by experts to disseminate MPB risk information and to justify a swift response and control measures. Most articles reported information presented to them by government and industry. We conclude that the media played primarily an educational role and gave limited attention to fostering public dialogue on MPB management.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 6
    Publication Date: 2005-01-01
    Description: The forest products sector is a major employer in much of rural Canada, and it is often assumed by policy makers that increased timber harvest is a viable means of rural economic development. Despite burgeoning research in the United States, relatively little attention has focused on the relationship between forest dependence and well-being in rural Canada. Especially lacking are macrocomparisons of regions and of forest sectors. This note presents an overview of the relationship between forest dependence and well-being in Canada. Analysis of 1996 Statistics Canada data revealed a great deal of variation in the effect of forest dependence on indicators of well-being (e.g., human capital, unemployment, income): some sectors had fairly positive outcomes (e.g., pulp and paper); others had more negative outcomes (e.g., logging). These relationships, however, vary a great deal by region, suggesting the need for more mid-range explanatory models that incorporate the particulars of place and sector.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 7
    Publication Date: 2011-03-01
    Description: Although the public advisory committee has become a very common tool for involving local people in forest management decisions, it does not necessarily broaden the base of public input and may simply replicate the challenges of access, representation, and capacity to participate that are found in wider society. As a category of social exclusion, this study explores why women are significantly underrepresented on forest management advisory committees in Canada and how these committees function as gendered units. Research involved 25 semistructured interviews with members (and former members) of two forest management advisory committees: Tembec in Manitoba and NewPage in Nova Scotia. The strongest evidence in our study suggests that these committees operate within male-dominated institutions and particular masculine norms that are simply taken for granted. Thus, social relations based on gender often go unacknowledged. Findings also showed that the lack of critical mass of women often limited the active participation of the small number of women involved in committee activities. Our empirical observations suggest that unless we attend to gender when involving communities in establishing strategies for forest management, we will reinforce gender disadvantage and exclusion and overrepresent industrial and utilitarian interests of forestry over other community and ecocentric values.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 8
    Publication Date: 2003-11-01
    Description: Much research attention regarding climate change has been focused on the macrophysical and, to a lesser extent, the macrosocial features of this phenomenon. An important step in mitigation and adaptation will be to examine the ways that climate change risks manifest themselves in particular social localities. Certain social groups may be at greater risk, not solely because of their geographic location in a region of high climate sensitivity but also because of economic, political, and cultural characteristics. Combining the insights of economics and sociology, we provide an ideal-type model of northern forest-based communities that suggests that these communities may represent a particularized social context in regard to climate change. Although scientific research indicates that northern forest ecosystems are among those regions at greatest risk to the impacts of climate change, the social dimensions of these communities indicate both a limited community capacity and a limited potential to perceive climate change as a salient risk issue that warrants action. Five features of forest-based communities describe this context in further detail: (i) the constraints on adaptability in rural, resource-dependent communities to respond to risk in a proactive manner, (ii) the national and international identification of deforestation as a central causal mechanism in the political arena, (iii) the nature of commercial forestry investment planning and management decision-making, (iv) the potential by members of these communities to underestimate the risk associated with climate change, and (v) the multiplicity of climate change risk factors in forest-based communities.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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