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工程、項目管理與設計安全要點、注意事項與施工必讀

'工程、項目管理與設計安全要點、注意事項與施工必讀'
?Environmental effects of oil and gas lease sites in a grassland ecosystemEnvironmental ManagementThe northern Great Plains of Saskatchewan is one of the most significantly modified Iandscapes in Canada? While the majority of anthropogenic disturbances to Saskatchewan's grasslands are the result of agricultural practices, development of petroleum and natural gas (PNG) resources is of increasing concern for grassland conservation. Although PNG developments require formal assessment and regulatory approval, follow-up and monitoring of the effects of PNG development on grasslands is not comm on practice. Consequently, the effects of PNG activity on grassla nds and the spatial and temporal extent of such impacts are largely unknown. This paper examines the spatial and temporal extent of PNG development infrastructure from 1955 to 2006 in a grassland ecosystem in southwest Saskatchewan. The effects of PNG development on grassland ecology were assessed from measurements of ground cover characteristics, soil properties, and plant comm unity composition at 31 sites in the study area. PNG lease sites were found to have low cover of herbaceous plants, club moss (Lycopodiaceae), litter, and shallow organic (Ah) horizons. Lease sites were also characterized by low diversity of desirable grassland plants and low range health values compared to off-lease referenee sites? These impacts were amplified at active and highly productive lease sites? Impacts of PNG development persisted for m-省略部分-. Results4.1? Excess of reactivity and delayed neutron fraction4. Reflector thickness4. Neutron spectra4. Void reactivity coefficient4.5. Configuration 1 一 Pu core undermoderated, U core overmoderated4.5. Configuration 2 - Pu core locally overmoderated, U core undermoderated4. Moderator temperature reactivity coefficient4. Fuel Temperature Reactivity Coefficient5. ConclusionsSmall Firm Growth in Developing CountriesWorld DevelopmentAlthough the vast majority of small firms in develop!ng countries never expand beyond a few employees, some experienee rapid and substantial growth. This study explores factors associated with small firm growth. We discuss key findi ngs for four types of factors: (1) in dividual en trepreneur characteristics; (2) firm characteristics; (3) relati onal factors (such as social ne tworks or value chai ns); and (4) con textual factors (such as the business environment). We conclude by suggesting implications for development practiti oners.Article OutlineIntroductionThe role of micro and small enterprisesResearch methodologyIndividual entrepreneur characteristics4.2. . Education4.3. . Work experience4.4. . Gender and householdFirm characteristics4.2. . Firm age4.3. . Formality (or Informality)4.4. . Access to financeSocial networksValue chainsInter-firm cooperation(b) . Horiz on tai li nkages(c) . Supporting marketsCon textual factorsImplications for development practionersAckno wledgeme nts
關 鍵 詞:
設計 注意事項 安全 項目管理 要點 施工 工程
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