PLANETSYS, a Computer Program for the Steady State and Transient Thermal Analysis of a Planetary Power Transmission System: User's Manual

The material presented is structured to guide the user in the practical and correct implementation of PLANETSYS which is capable of simulating the thermomechanical performance of a multistage planetary power transmission. In this version of PLANETSYS, the user can select either SKF or NASA models in calculating lubricant film thickness and traction forces

The Effects of Climate Change on Harp Seals (Pagophilus groenlandicus)

Harp seals (Pagophilus groenlandicus) have evolved life history strategies to exploit seasonal sea ice as a breeding platform. As such, individuals are prepared to deal with fluctuations in the quantity and quality of ice in their breeding areas. It remains unclear, however, how shifts in climate may affect seal populations. The present study assesses the effects of climate change on harp seals through three linked analyses. First, we tested the effects of short-term climate variability on young-of-the year harp seal mortality using a linear regression of sea ice cover in the Gulf of St. Lawrence against stranding rates of dead harp seals in the region during 1992 to 2010. A similar regression of stranding rates and North Atlantic Oscillation (NAO) index values was also conducted. These analyses revealed negative correlations between both ice cover and NAO conditions and seal mortality, indicating that lighter ice cover and lower NAO values result in higher mortality. A retrospective cross-correlation analysis of NAO conditions and sea ice cover from 1978 to 2011 revealed that NAO-related changes in sea ice may have contributed to the depletion of seals on the east coast of Canada during 1950 to 1972, and to their recovery during 1973 to 2000. This historical retrospective also reveals opposite links between neonatal mortality in harp seals in the Northeast Atlantic and NAO phase. Finally, an assessment of the long-term trends in sea ice cover in the breeding regions of harp seals across the entire North Atlantic during 1979 through 2011 using multiple linear regression models and mixed effects linear regression models revealed that sea ice cover in all harp seal breeding regions has been declining by as much as 6 percent per decade over the time series of available satellite data

Uncertainty in the school playground: shiftingrationalities and teachers’ sense-making in themanagement of risks for children with disabilities

Recent theoretical debates highlight the competing risk logics and varying rationalitiesmobilised in response to dangers and approaches to risk management. Yet the conceptof uncertainty, and how it informs perceived risks, is relatively less well understood.Debates of this kind are illuminated in contexts where risks are managed as part ofeveryday practice. The school setting provides an example of a context in which risksare continuously negotiated amidst dominant protectionist concerns about children’swell-being and safety. Such protectionist concerns are particularly pronounced forchildren with disabilities, as assumptions about limited capabilities complicate andstructure the everyday play experiences for children. Drawing on findings from theSydney Playground Project, in this article we aim to unpack the felt discomfortexperienced by school staff in their responses to uncertain moments in children’splay. We report qualitative data collected from two schools between October 2014and September 2015 using video observations of children’s play and teachers’responses to an online Tolerance of Risk in Play Scale. Our findings point to thecompeting logics and forms of sense-making operationalised by teachers to manage theunknown. Our analysis explored the ways in which risk strategies were (re)framed byschool staff and such reframing explained their action (or inaction) in the playgroundand how these were underpinned by concerns about professional accountabilities.Their responses located risks within the child with disabilities, rather than the playactivity itself. Another approach to uncertainty can be achieved by mobilising adiscourse of trust in which ‘letting-go’ offers children opportunities to reflexivelyengage in risk-taking

Lower parent tolerance of risk in play for children with disability than typically developing children

Becoming an autonomous adult includes understanding consequences associated with risks. The aim of this study was to compare parents of children with and without disability to identify any differences in promoting manageable risk-taking. Data were collected from parents of typically developing children and parents of children with developmental disability. Two groups were matched based on parent and child chronological ages for typically developing children and children with developmental disability. These parents completed the Tolerance of Risk in Play Scale, a 16-item measure of activities adults allow their children to participate in. The total number of tolerated risks was significantly higher for the parents of typically developing children (341[79%]) than the parents of children with developmental disability (247[58%]) (p<0.05). Parents of children with a disability were less tolerant of risk-taking in play than the parents of typically developing children