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181.
Risk perception studies show that individuals tend to underestimate significant risks, overestimate negligible ones, and distrust authorities. They also rely on a variety of strategies or heuristics to reach decisions regarding their risk-taking behavior. We report on a survey of fishermen and crabbers engaged in recreational and substance fishing in a Puerto Rican estuary (near Humacao), which has been declared a "Superfund site" because of suspected contamination by mercury, and at ecologically similar control sites. Nearly everyone interviewed at the Humacao site was aware of the mercury contamination, but either denied its importance, believed the contamination was restricted to a distant part of the estuary, or assumed that the estuary would be closed by the authorities if the threat was real. All site-users consumed the fish and crabs they caught. At Humacao, the average catch was 7 fish per fishermen (mostly tilapia, Tilapia mossambica, and tarpon, Megalops atlantica) and 13 crabs per crabber (all blue crabs, Callinectes sapidus). On average, the site-users returned to the lagoons about 3-4 times per month. At control sites, fewer fish were eaten. The worst case consumption of tarpon, a species which concentrated mercury at Eastern Puerto Rico, provided an exposure exceeding the EPA reference dose, whereas consumption of one tarpon per week did not entail excess exposure. Fortunately, few individuals caught tarpon exclusively. Unlike counterparts in the northeastern United States, they trusted authorities and indicated that they would have heeded warnings of mercury contamination posted where they fished. 相似文献
182.
Interagency cooperation between special education and vocational rehabilitation (VR) is central to ensuring the continuity of services to young adults with disabilities who are in transition from school to adult living. However, the interface between special education and VR may be complicated by order of selection, an equally binding mandate in federal VR policy to provide priority services to individuals with the most severe disabilities. Because students with learning disabilities are typically perceived as having mild rather than severe disabilities, these youths are most at risk for falling through the cracks in the service landscape once they leave the school setting in states where the VR agency is implementing an order of selection procedure. This article identifies and discusses common impediments to collaborative transition planning for students with learning disabilities that may be intensified when the state VR agency is operating under an order of selection plan. Recommendations are provided to facilitate greater interagency cooperation among schools and VR agencies so that transition planning and implementation for students with learning disabilities is not subverted as a result of the order of selection mandate. 相似文献
183.
Joanna Morais Christine Thomas-Agnan Michel Simioni 《Journal of applied statistics》2018,45(9):1670-1689
When the aim is to model market shares, the marketing literature proposes some regression models which can be qualified as attraction models. They are generally derived from an aggregated version of the multinomial logit model. But aggregated multinomial logit models (MNL) and the so-called generalized multiplicative competitive interaction models (GMCI) present some limitations: in their simpler version they do not specify brand-specific and cross effect parameters. In this paper, we consider alternative models: the Dirichlet model (DIR) and the compositional model (CODA). DIR allows to introduce brand-specific parameters and CODA allows additionally to consider cross effect parameters. We show that these two models can be written in a similar fashion, called attraction form, as the MNL and the GMCI models. As market share models are usually interpreted in terms of elasticities, we also use this notion to interpret the DIR and CODA models. We compare the properties of the models in order to explain why CODA and DIR models can outperform traditional market share models. An application to the automobile market is presented where we model brands market shares as a function of media investments, controlling for the brands price and scrapping incentive. We compare the quality of the models using measures adapted to shares. 相似文献
184.
This study explored the experiential determinants of schadenfreude, how schadenfreude changes as a function of relationship, and how recollections of schadenfreude may vary by age. Using a narrative approach, 12‐ and 15‐year‐olds (N = 60) described times they felt schadenfreude toward various peers and adults. We coded their responses to extract information regarding preceding misfortunes and underlying reasons for schadenfreude. We found that adolescents' schadenfreude often involved another’s physical harm and failure, and was rooted in reasons of deservingness and personal gain. There were unique trends in the types of misfortunes and reasons mentioned toward each target of interest. Finally, deservingness reasoning was prominent within 15‐year‐olds’ schadenfreude experiences. The findings are discussed in relation to adolescents’ emotional experiences in conflict situations. 相似文献
185.
This study focuses on the effects of capital campaigns on the fundraising performance of other nonprofits within the same geographic region. Drawing from research in organizational ecology and charitable giving, we offer a theory of capital campaign impact that says any impact of a campaign must be looked for in a carefully circumscribed area or population of organizations, and that campaigns raise awareness of the need for services within a particular area. We use data on capital campaigns at arts nonprofit organizations in forty‐eight counties across the United States between 1999 and 2007, coupled with financial data on nonprofits in the arts in the same county to test our hypotheses. The results from our analyses show that a major capital campaign positively affects other nonprofits’ fundraising, and the effect varies depending on the phase of the capital campaign. We discuss possible mechanisms that drive the positive effects of capital campaigns, and conclude with a short illustration. 相似文献
186.
Joanna Burger Nellie Tsipoura April Simnor Taryn Pittfield Christian Jeitner David Mizrahi Larry Niles Lisa Ferguson 《Urban Ecosystems》2017,20(2):363-373
Hurricane Sandy resulted in massive destruction of many coastal ecological and human communities in the Northeastern United States in 2012. Beach-nesting and migrating birds are vulnerable to loss of essential habitat as a result of storms. In this paper we report the perceptions of beach users about avian use of the beaches, conservation measures to protect birds, and recent restoration efforts at Stone Harbor Point (New Jersey) to provide beach habitat for birds. Nearly all the visitors to the beach were Caucasian (N = 555), and reported their activity as walking (93 %), birding (19 %), biking (7 %), and lounging, boating, fishing or photographing (5 % or less for each). Visitors mainly came to this beach because of aesthetics, exercise, and vacation or to visit friends. Subjects rated protecting endangered species and the environment, restoring the beach, and designating off-limit areas to protect birds the highest. They rated conservation measures for birds the highest, and allowing dogs on the beach and providing more opportunities for jogging the lowest. The results suggest that protecting endangered species and habitat for nesting birds is a slightly higher goal than restoring dunes and marshes for flood control, which provides evidence for public support of restoration projects that protect both ecological and human communities. Providing more space for their own recreational activities was rated much lower, again supporting community good over personal uses. This information supports the restoration efforts following Sandy, and the importance of restoration projects that integrate ecological and human health goals in urban environments. 相似文献
187.
188.
The effects of urbanization on biodiversity are generally considered to be negative, but the potential for landscape context
to modulate these effects has not been adequately examined because most urban ecology research has been conducted in one biome:
the temperate forest. This bias also applies to studies of the urban ecology of bats, whose diversity is correlated with habitat
heterogeneity. We investigated the hypothesis that in the fairly flat, homogeneous Prairies, urbanization, by creating structurally
complex islands, benefits bats by increasing access to the vertical landscape elements (buildings and trees) in which they
roost. From 2006 to 2008, we surveyed bat assemblages in and around Calgary, Alberta, using mist nets to capture them and
bat detectors to record their echolocation activity. Our data supported the prediction that urbanization increases the abundance
of Prairie bats, but not the prediction that it increases their diversity. Instead, the urban bat assemblage was less diverse,
and exhibited decreased species evenness compared to non-urban assemblages. Although Myotis lucifugus dominated bat assemblages throughout our study area, this was most evident in the city, and this species drove the increased
urban abundance of bats. Ultimately, we reject our hypothesis and conclude that urbanization in the Prairies may create attractive
habitat for one synanthropic bat, but is detrimental to others. 相似文献
189.
Brasfield H Febres J Shorey R Strong D Ninnemann A Elmquist J Andersen SM Bucossi M Schonbrun YC Temple JR Stuart GL 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2012,28(1):77-88
Little work has examined the interrelations among intimate partner violence (IPV), alcohol use, and gambling behavior, and no studies have examined these relationships among males court-ordered to batterer intervention programs (BIPs). The aim of the current investigation was to explore the associations between IPV, alcohol use, and gambling behavior among 341 males court-mandated to attend BIPs utilizing self-report measures. Voluntary, anonymous questionnaires were administered and completed during regularly scheduled BIP sessions. Compared to the general population, a higher percentage of the sample met criteria for pathological gambling (9%), and problem gambling (17%). Further, males exhibiting pathological gambling were more likely to be hazardous drinkers, and hazardous drinkers were more likely to exhibit pathological gambling. Additionally, pathological gamblers were at an increased risk for the perpetration of both physical and sexual aggression. Finally, gambling behavior uniquely predicted the perpetration of sexual aggression above and beyond alcohol use, impulsivity, and relationship satisfaction. The implications of these results for future research and intervention are discussed. 相似文献
190.
M.D.R. Evans Jonathan Kelley Joanna Sikora Donald J. Treiman 《Research in social stratification and mobility》2010
Children growing up in homes with many books get 3 years more schooling than children from bookless homes, independent of their parents’ education, occupation, and class. This is as great an advantage as having university educated rather than unschooled parents, and twice the advantage of having a professional rather than an unskilled father. It holds equally in rich nations and in poor; in the past and in the present; under Communism, capitalism, and Apartheid; and most strongly in China. Data are from representative national samples in 27 nations, with over 70,000 cases, analyzed using multi-level linear and probit models with multiple imputation of missing data. 相似文献