Power mobility and the built environment: the experiences of older Canadians

In this article, we employ data from qualitative interviews with 15 men and 14 women aged 51–92 to examine older Canadian adults’ experiences of utilizing power wheelchairs and motorized scooters in the context of the built environment. When functioning properly and utilized within accessible spaces, power mobility devices provided many of the participants with the autonomy they desired. However, the features and functionality of power mobility equipment also constrained participants’ abilities to negotiate their surroundings and maintain valued social roles and physical activities. Participants’ experiences of power mobility technology as enabling or disabling were further complicated by the organization of the built environment, as the men and women described encountering various barriers to mobility within both public and private spaces. We discuss our findings in relation to the extant literature concerning the social and spatial construction of disability.     

Discourses about children's mental health and developmental disorders in North American women's magazines 1990–2012

This paper describes and analyses the portrayal of children's mental health and developmental issues (CMHI) in articles located in a random sample of a selection of available high‐circulating English language North American ‘women's magazines’ indexed in the Reader's Guide to Periodical Literature from 1990 to 2012. It is based upon a qualitative discourse analysis. CMHI are portrayed as materially, biologically real, prevalent and growing in incidence, and severity. They are also portrayed as located in the ‘non‐normal’, ‘non‐nice’, ‘disliked’ and ‘non‐successful’ individual child. Neither the facticity nor the biomedicalization of CMHI is questioned. The psy‐scientists and practitioners cited as experts for the ‘disorders’ offer contradictory and confusing information and advice. The possible theoretical and pragmatic explanations and consequences of this portrayal are discussed.     

The Problematic Progress of ‘Integration’ in the Chinese State's Approach to Xinjiang, 1759 – 2005

The statement that Xinjiang is an integral province of the People's Republic of China (PRC) is not as banal as it would first appear. The primary question that arises from this statement is how—by what processes and strategies—was Xinjiang brought to its contemporary situation as a province of the PRC? This paper seeks to highlight that, although Xinjiang's history since the eighteenth century has been one of great turbulence and dynamism, underlying continuities in both the practice of Chinese power and perceptions of Xinjiang impact profoundly on contemporary China's rule of Xinjiang. Therefore, this study attempts to chart the transition of the Qing goal of territorial incorporation of the region based upon a system of indirect rule c.1760 to the post-imperial Chinese state's goal of territorial incorporation based on the extension of direct, modern strategies of government and control.     

Derivation of a biological quality index for river sites: Comparison of the observed with the expected fauna

A method for the national assessment of the biological quality of river sites is developed. Multivariate discrimination, based on site environmental characteristics, is used on a biological classification of reference sites to derive a procedure to predict the fauna to be expected in the absence of environmental stress. Various quality indices, based on a comparison of the observed with the expected fauna, are proposed. The sizes of the various sources of error and variation, and their effects on the rates of misclassification to quality bands, are examined.     

Improvement over bayes prediction in small samples in the presence of model uncertainty

In an online prediction context, the authors introduce a new class of mongrel criteria that allow for the weighing of candidate models and the combination of their predictions based both on model‐based and empirical measures of their performance. They present simulation results which show that model averaging using the mongrel‐derived weights leads, in small samples, to predictions that are more accurate than that obtained by Bayesian weight updating, provided that none of the candidate models is too distant from the data generator.     

International trade,labour migrations and capital flows: long-term evidence for Australia,Canada, the United Kingdom and the United States

The historical links between international factor mobility and the extent of international trade are analysed over the long term for three high labour immigration countries (Australia, Canada and the United States) and one high labour emigration country (the United Kingdom).
Time series data are used. Current international openness is assessed relative to this experience. International factor market integration has increased over time with trade liberalization, suggesting that traditional Hecksher-Ohlin thinking cannot be readily used to account for long-term trends in several important economies.
Both trade and factor mobility have an episodic character that makes it misleading to assess current international openness only in terms of post-World War 2 economic trends.     

Entry charges on immigrants

The author analyzes "the various arguments that can be advanced for imposing fees on immigrants to optimize...resident gains.... This article discusses cost recovery and emphasizes the costs of multiculturalism as a possible basis for fees. It then analyzes the effects of inelastic immigrant supplies in providing an optimal tariff motivation for monopsonistically restricting labor flows and deals with the second-best problem of devising an optimal fee policy to accompany a possibly suboptimal immigration quota. Next, attention turns to the role of priceable externalities. Externalities which are expensive to price because of transactions costs are analyzed. Finally, along with summarization of major conclusions, the author considers if, even in the economic interests of existing residents, entry rights should be sold."     

Predicting tree species richness in urban forests

There has been an increasing interest in urban forests and the levels of biodiversity they contain. Currently there are no spatially explicit maps of tree species richness in urban areas. This research tests and identifies GIS and remote sensing metrics (climate, area, productivity, three-dimensional structure) hypothesized to be associated with species richness in native forests and identifies methods that can be applied to predict and map tree species richness in cities. We quantified tree species richness, floristic composition, and structure in 28 1-ha plots in the city of Los Angeles. Climate and remote sensing metrics from high-resolution aerial imagery (10 cm), QuickBird (60 cm), Landsat (30 m), MODIS (250 m), and airborne lidar (2 m) were collected for each plot. There were 1208 individual stems and 108 trees identified to species. Species richness ranged from 2 to 31 species per ha and averaged 17 species per ha. Tree canopy cover from QuickBird explained the highest portion of variance (54%) in tree species richness followed by NDVI from Landsat (42%). Tree species richness can be higher in residential urban forests than native forests in the United States. Spatially explicit species richness maps at 1 ha can be created and tested for cities in order to identify both hotspots and coldspots of tree species richness and changes in species richness over time.