Fitness benefits of prolonged post-reproductive lifespan in women

Most animals reproduce until they die, but in humans, females can survive long after ceasing reproduction. In theory, a prolonged post-reproductive lifespan will evolve when females can gain greater fitness by increasing the success of their offspring than by continuing to breed themselves. Although reproductive success is known to decline in old age, it is unknown whether women gain fitness by prolonging lifespan post-reproduction. Using complete multi-generational demographic records, we show that women with a prolonged post-reproductive lifespan have more grandchildren, and hence greater fitness, in pre-modern populations of both Finns and Canadians. This fitness benefit arises because post-reproductive mothers enhance the lifetime reproductive success of their offspring by allowing them to breed earlier, more frequently and more successfully. Finally, the fitness benefits of prolonged lifespan diminish as the reproductive output of offspring declines. This suggests that in female humans, selection for deferred ageing should wane when one's own offspring become post-reproductive and, correspondingly, we show that rates of female mortality accelerate as their offspring terminate reproduction

Children's role in the community response to HIV in Zimbabwe

Introduction: Recent debates on how to achieve an optimal HIV response are dominated by intervention strategies that fail to recognize children’s role in the community response to HIV. Whilst formal responses are key to the HIV response, they must recognize and build on indigenous community resources. This study examines adult’s perspectives on the role of children in the HIV response in the Matobo District of southern Zimbabwe. Methods: Through a mix of individual interviews (n = 19) and focus group discussions (n = 9), 90 community members who were active in social groups spoke about their community response to HIV. Transcripts were subjected to a thematic analysis and coding to generate key concepts and representations. Findings: In the wake of the HIV epidemic, traditional views of children’s social value as domestic ‘‘helpers’’ have evolved into them being regarded as capable and competent actors in the care and support of people living with HIV or AIDS, and as integral to household survival. Yet concurrent representations of children with excessive caregiving responsibilities as potentially vulnerable and at risk suggest that there is a limit to the role of children in the HIV response. Conclusion: Community volunteers and health staff delivering HIV services need to recognize the ‘‘behind the scene’’ role of children in the HIV response and ensure that children are incorporated into their modus operandi — both as social actors and as individuals in need of support

Humans do not always act selfishly: social identity and helping in emergency evacuation simulation

To monitor and predict the behaviour of a crowd, it is imperative that the technology used is based on an accurate understanding of crowd psychology. However, most simulations of evacuation scenarios rely on outdated assumptions about the way people behave or only consider the locomotion of pedestrian movement. We present a social model for pedestrian simulation based on self-categorisation processes during an emergency evacuation. We demonstrate the impact of this new model on the behaviour of pedestrians and on evacuation times. In addition to the Optimal Steps Model for locomotion, we add a realistic social model of collective behaviour

Dyslexic learners and learning centre provision - could do better?

Report of a CELT project on supporting students through innovation and researchLearning Centre staff at the University of Wolverhampton generally have good awareness of disability issues and try to ensure services and facilities are accessible to a wide range of users. However, little work had been done directly with users to explore their views of our services and the problems they might face when using them. The research targeted dyslexic learners as the University has a relatively large population of students with this disability. In addition many of our services rely on an ability to cope with printed and electronic information and these might pose particular problems for users with dyslexia. The services might include apparently simple elements such as guides to particular Learning Centres through to more complex examples including the subject web pages and information skills workshops

PROFESSIONAL COMPETENCIES FOR E-HELPERS: A TELEPRACTICE RESOURCE

The primary purpose of this study was to craft and validate a set of core competencies necessary for an e-Helper to possess. A review of the literature guided the creation of the initial competencies. Following expert review, the competencies were revised and formatted into an online survey which was sent to respondents in four target groups: (a) school administrators who had adopted telepractice as a service delivery model; (b) SLPs experienced in telepractice within a school setting; (c) current e-Helpers, and (d) scholars experienced in telepractice. Sixty percent (21 out of 35) of the competencies were rated as “important” by 76-100% of respondents. The remaining competencies could be more or less important dependent on workplace requirements

How Many U.S. Jobs Might Be Offshorable?

Using detailed information on the nature of work done in over 800 BLS occupational codes, this paper ranks those occupations according to how easy/hard it is to offshore the work— either physically or electronically. Using that ranking, I estimate that somewhere between 22% and 29% of all U.S. jobs are or will be potentially offshorable within a decade or two. (I make no estimate of how many jobs will actually be offshored.) Since my rankings are subjective, two alternatives are presented—one is entirely objective, the other is an independent subjective ranking. It is found that there is little or no correlation between an occupation’s “offshorability” and the skill level of its workers (as measured either by educational attainment or wages). However, it appears that, controlling for education, the most highly offshorable occupations were already paying significantly lower wages in 2004.

Bad influence? – an investigation into the purported negative influence of foreign domestic helpers on children's second language English acquisition

This paper explores the purported negative influence of foreign domestic helpers (FDHs) on child second language acquisition (SLA) by studying Hong Kong Cantonese children's listening ability in second language (L2) English. 31 kindergarten third graders aged 4;6 to 6, and 29 first year secondary students aged 11-14 who have had a Filipino domestic helper at home took part in the study. In addition, 34 youngsters (20 in kindergarten, 14 in secondary) who did not have a Filipino helper participated as controls. Results from two listening tasks (picture choosing task, sound discrimination task) suggest that informants do not differ from the control in their abilities to listen to American-, British-, and Hong Kong English, and that they are better at listening to Filipino-accented English than the control. These findings cast doubts on the anecdotal belief of the harmful effect FDHs have on children's language acquisition including an L2. Moreover, the additional effect of being familiar with another variety of English is arguably a desirable outcome given that English is used as a lingua franca among non-native speakers on a daily basis in this highly globalised world