The Disappeared: images of the environment at Freetown's urban margins

‘The Disappeared’ is a small collection of images documenting the deforestation of the mountain range outside Freetown, the capital of Sierra Leone. Aesthetically these images are inspired by West African photographic practices and represent an alternative ethnography of the recent war's impact on this region. The article outlines the dynamics of deforestation in the region but argues that the traditional realist aesthetic of documentary photography is no longer a compelling way to represent this issue. Beginning with a West African (particularly Yoruba) notion of the ‘truth’ of the photographic image, ‘The Disappeared’ charts a different path for engaged visual ethnography and for intervening in the politics of visual representation.     

Influential factors in the choice of public transportation or cars as the mode of transportation in habitual commutes / Factores que influyen en la elección del transporte público o el automóvil como modo de transporte en los desplazamientos habituales

The goal of this study is to analyse the differences in attitudes towards habitual modes of transportation among users of public and private transportation. The explanatory capacity of attitudes when determining the mode choice, along with the structural and sociodemographic factors, are also verified. The study was performed in three Spanish cities with 742 participants. The results revealed that cars are better rated than public modes of transportation in the attributes associated with immediate advantages (i.e., speed and availability) and convenience. Subways are highly rated in both immediate and deferred advantages (environment, safety, cost and health). Buses are the mode rated the lowest of the three. Using logistic regression, it was verified that the variance explained by a model that includes attitudes (R² = .639) is higher than the variance explained by a model based solely on variables related to infrastructures (R² = .489). The discussion of these results includes proposals aimed at decreasing car use.     

A global disability indicator

Disability is difficulty performing roles and activities due to health problems. It is largely experienced by older persons as they accumulate progressive chronic conditions. To measure functional status of individuals and populations, contemporary surveys include sets of detailed items about disability. Little effort has gone into developing global indicators of disability that cover the concept briefly but well. A global disability indicator is a compact and inexpensive device for public health surveillance and scientific study of disablement. I present and critique items that have been used in North American surveys. Good candidates are selected for methodological study. Both laboratory-based cognitive studies and large-scale statistical studies are recommended; the first will reveal meanings of items and responses and the second, items' systematic structure and prediction ability. The ultimate goal is to identify one or a few fine indicators for widespread inclusion in population health surveys.     

Moving beyond dualism: A dialogue with Western European and American Indian views of spirituality, nature, and science

Western European and Native American approaches to spirituality, nature, and science have implications for policy decisions now and into the Twenty First century. This essay explicates traditional American Indian and Western European philosophic and spiritual views of nature in order to promote dialogue and inform choices that are crucial regarding the future of the biosphere. A concept of nature, then, is more than just an explanation of how living things interact with one another. It also serves as a reference point for deciphering the meaning of existence itself. Jeremy Rifkin     

Propagation of Uncertainty in Risk Assessments: The Need to Distinguish Between Uncertainty Due to Lack of Knowledge and Uncertainty Due to Variability

In quantitative uncertainty analysis, it is essential to define rigorously the endpoint or target of the assessment. Two distinctly different approaches using Monte Carlo methods are discussed: (1) the end point is a fixed but unknown value (e.g., the maximally exposed individual, the average individual, or a specific individual) or (2) the end point is an unknown distribution of values (e.g., the variability of exposures among unspecified individuals in the population). In the first case, values are sampled at random from distributions representing various "degrees of belief" about the unknown "fixed" values of the parameters to produce a distribution of model results. The distribution of model results represents a subjective confidence statement about the true but unknown assessment end point. The important input parameters are those that contribute most to the spread in the distribution of the model results. In the second case, Monte Carlo calculations are performed in two dimensions producing numerous alternative representations of the true but unknown distribution. These alternative distributions permit subject confidence statements to be made from two perspectives: (1) for the individual exposure occurring at a specified fractile of the distribution or (2) for the fractile of the distribution associated with a specified level of individual exposure. The relative importance of input parameters will depend on the fractile or exposure level of interest. The quantification of uncertainty for the simulation of a true but unknown distribution of values represents the state-of-the-art in assessment modeling.