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21.
Multimedia fate and exposure models are widely used to regulate the release of toxic chemicals, to set cleanup standards for contaminated sites, and to evaluate emissions in life-cycle assessment. CalTOX, one of these models, is used to calculate the potential dose, an outcome that is combined with the toxicity of the chemical to determine the Human Toxicity Potential (HTP), used to aggregate and compare emissions. The comprehensive assessment of the uncertainty in the potential dose calculation in this article serves to provide the information necessary to evaluate the reliability of decisions based on the HTP A framework for uncertainty analysis in multimedia risk assessment is proposed and evaluated with four types of uncertainty. Parameter uncertainty is assessed through Monte Carlo analysis. The variability in landscape parameters is assessed through a comparison of potential dose calculations for different regions in the United States. Decision rule uncertainty is explored through a comparison of the HTP values under open and closed system boundaries. Model uncertainty is evaluated through two case studies, one using alternative formulations for calculating the plant concentration and the other testing the steady state assumption for wet deposition. This investigation shows that steady state conditions for the removal of chemicals from the atmosphere are not appropriate and result in an underestimate of the potential dose for 25% of the 336 chemicals evaluated. 相似文献
22.
John Edgar Reid Jr. Ph.D. 《Visual Studies》2013,28(1):80-88
In this essay the George Foster Peabody Collection and the WSB Atlanta Television News Archive are described. A discussion of the form, structure and content of the collections reveal that each are ideally suited to visual sociological investigation. In all, the textual body of visual imagery found in the Peabody collection is an important source for the study of culture. The collection offers access to fifty years of award winning audio and video recordings, spanning news, documentary, international, entertainment, public service and childrens program submissions, the WSB collection contains a rich array of materials that service to elaborate on a cultural and historic framework of the new and old south. Hard news stories along with documentaries reveal a variety of public and social rituals of historic importance, the WSB and Peabody collections can be accessed to fulfil a number of scholarly endeavors. Visual sociologists, anthropologists and communication scholars are encouraged to further explore the use of these two electronic media archives. 相似文献
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Urban Ecosystems - Many European towns and cities have undergone reurbanisation processes in recent decades. However, their effects on urban biodiversity have been poorly studied. Currently... 相似文献
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大型国有企业或外资企业在经济发展中所取得的成就往往受到广泛关注,而由国际著名战略咨询公司摩立特集团和国务院发展研究中心近期公布的一项调查显示,中小型创业企业的增长活力和动力也不可忽视。 相似文献
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Using a unique data set from the major Colombian cities collected between 2000–2003 and with information on more than 12,000
households, this paper studies the relationship between the kidnap risk a household faces with its migration decisions. We
find evidence that exposure to such risk induces households to react sending some of their members to an international destination
but not necessarily to a domestic one. Estimates are robust to the inclusion of several household characteristics usual in
the migration literature, other crime risks, reported feelings of insecurity of the household, and an alternative measure
of kidnap risk. 相似文献
28.
We argue that place offers an effective framework for connecting popular culture with social justice narratives by exploring audience interpretations of Lemonade in 2016’s tumultuous racial climate. Working from interviews with 35 of Lemonade’s listeners/viewers regarding their understanding of the album, we argue that audience members used Lemonade to plot spaces of racial pride, community, and equality. Supporting previous audience studies’ findings, Beyoncé’s audiences engaged actively with the text and explored the complex symbolism through interpretive communities, but the audiences we spoke with also transcended these spaces. Using Lemonade as a tool to understand and reimagine historical social movements, audiences deployed the album to cultivate an anti-racist habitus in attempts to make their worlds more just. 相似文献
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