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61.
Models of the interaction of population, the economy, and the environment often contain nonlinear functional relationships and variables that move at different speeds. These properties foster apparent unpredictabilities in system behaviour. Using a simple deterministic model of demographic, economic and environmental interactions we illustrate the usefulness of geometric singular perturbation theory in environmental population economics. In contrast to local stability analysis, the theory of slow‐fast dynamics helps to gain new insights into the global behaviour of the system. In particular, the knowledge of the basins of attraction of the stationary states enables one to determine the regions of sustainable future paths of resources and population. 相似文献
62.
Out of the policy initiatives that emerged in the aftermath of the “Refugee Crisis”, none is more elusive that the hotspot approach. Our aim in this article is to shed light upon what kind of policy output the hotspot approach entails, by conducting a framing analysis of key European Commission (EC) documents. We draw on discursive institutionalist approaches which focus on the policy process. Within the policy process, we focus particularly on identifying policy frames as organizing principles and key ideas, in order to trace the representation of the problem and solutions to it. Our findings show how the hotspot approach, in incarnating both the problem and the solution to migration as primarily a concern for management, represents another string in the long-standing tensions of the harmonisation of the EU asylum and migration policies. 相似文献
63.
Melissa Manrique Maureen A. Allwood Cameron P. Pugach Nana Amoh Alexandra Cerbone 《Journal of American college health : J of ACH》2020,68(3):227-235
AbstractObjective: We examined whether perceptions of being bullied during middle and high school were associated with depressive, anxiety, and posttraumatic stress disorder (PTSD) symptoms during college. We also examined whether perceived social support (PSS) mediated the association between bullying and symptoms, and explored whether parental, peer, or other sources of support was most beneficial. Participants: Undergraduates (N?=?270) from an urban commuter college in the Northeast participated during Spring 2013 or Fall 2015. Methods: Psychometrically sound self-report measures were used to assess symptoms and perceptions of bullying and social support. Results: As hypothesized, bullying was associated with more symptoms, and PSS significantly mediated the associations between bullying and symptoms of PTSD and depression. Conclusion: The college years provide another opportunity to address the effects of middle and high school bullying. Receiving current support for past bullying is beneficial but is not enough, college counseling services are needed to reduce symptoms. 相似文献
64.
T. Alexandra Beauregard 《英国管理杂志》2014,25(4):772-789
This study examined the impact of employees' fairness perceptions regarding organizational work?life balance initiatives on their performance of counterproductive work behaviour (CWB). Moderating effects of adaptive and maladaptive perfectionism were also explored. Quantitative data collected from 224 public sector employees demonstrated significant main and moderating effects of informational justice, adaptive perfectionism and maladaptive perfectionism on CWB. Adaptive perfectionism weakened the link between informational justice and CWB, while maladaptive perfectionism strengthened it. Qualitative data collected from 26 employees indicate that both the social exchange and job stress models are useful frameworks for understanding CWB in the context of work?life balance initiatives; CWB emerged as both a negative emotional reaction to unfairness and as a tool used by employees to restore equity in the exchange relationship with their employer. Theoretical and practical implications are discussed. 相似文献
65.
In a report from 2008 the Organization for Economic Cooperation and Development came to the conclusion that Portugal is a country still very much marked by regional asymmetries and in need of better regional governance mechanisms and policies. We propose a regional development index for Portugal at the NUTS III level, based on the methodology of the human development index (HDI) from the United Nations Development Programme, which will be helpful to assess the evolution of the asymmetries between regions and evaluate the need for regional policy. Results show us a country that has most of the highest ranked NUTS III regions positioned along the coastline, although some interior NUTS III regions improved their relative positions in the ranking between 2004 and 2009. In addition to the three traditional dimensions of the HDI—income, education, and health—we include two more, given their increasing importance in the literature that criticizes the HDI and suggests the inclusion of new variables—governance and environment. Results show some considerable differences when we add the environment dimension: the interior regions improve their relative positions in the ranking, but in terms of governance they change little. Results also show that there is still the need for regional policy, although the dispersion in the ranking between the best and worst positioned NUTS III regions has decreased in all dimensions except education. 相似文献
66.
67.
Jeff Bezemer Ged Murtagh Alexandra Cope Gunther Kress Roger Kneebone 《Symbolic Interaction》2011,34(3):398-414
The focus of this article is on professional activity in the operating theater. We explore how surgeons and nurses organize their activities, how social interaction is used to help structure and define situations, and how differentials in knowledge are constructed and oriented to. We utilize some ideas and concepts from symbolic interactionism, ethnomethodology, and conversation analysis to analyze small clips of audio‐ and video‐recorded interaction. Focusing on how surgeons and nurses request, provide, and apply surgical instruments, the analysis shows how surgical work is accomplished through talk and bodily conduct. We conclude that, examined in detail, the social interaction between surgeons and nurses is analytically inseparable from the “technical” demands of their work. 相似文献
68.
Alexandra Vázquez Juan R. Ordoñana Harvey Whitehouse Ángel Gómez 《Revista de Psicología Social》2019,34(3):413-438
AbstractIdentity fusion — a visceral feeling of connection with a group — is a powerful predictor of willingness to engage in extreme pro-group behaviour. Here we propose that identity fusion also reinforces willingness to fight and die for one’s siblings, and we explore one of the underlying mechanisms producing this effect. We additionally controlled for a powerful predictor of family investment, perceived psychological similarity with the sibling. Our study shows that fusion with a sibling, but not perceived similarity, is positively associated with willingness to fight and die for the sibling. This relation is mediated by the imagined personal consequences of losing one’s sibling. This research extends previous work on fusion with groups to pairs of individuals and identifies a new mediator of the effect of fusion on willingness to fight and die for others. Overall, these results suggest that identity fusion might contribute towards explaining self-sacrifice among genetically related individuals as predicted by the theory of kin selection. 相似文献
69.
70.
Ana Radovic Alexandra L. DeMand Theresa Gmelin Bradley D. Stein Elizabeth Miller 《Journal of Technology in Human Services》2017,35(3):169-182
Two moderated social media websites were designed for increasing likelihood for mental health treatment engagement for depressed adolescents (sova.pitt.edu) and for parents (wisesova.pitt.edu). This article describes iterative stakeholder interviews conducted with adolescents, young adults, parents, advocates, and clinicians and use of human computer interaction techniques to inform major design changes which: (a) underscored the role of online interaction to provide emotional support and information, (b) importance of anonymity, (c) desire to share positive media, and (d) need for frequent moderation. Future studies will examine acceptability and effectiveness of revised websites in helping depressed adolescents and their parents engage with treatment. 相似文献