Urban hazards: spatial ecology and survivorship of a turtle in an expanding suburban environment

Urban Ecosystems - Urbanization poses a threat to long-lived vertebrates, particularly from road mortalities that can threaten population persistence. We studied movements, behavior and...     

Abstracts

Objective: To ascertain if two commonly used health status measures could be successfully self-administered to a group of older men recruited from the community to volunteer for a clinical research project and to correlate responses to the health status questionnaire to testosterone levels. Methods: In a cross-sectional survey 93 men, age 70 or greater, responded to a random mailing to a suburban community. Sixty-eight men were eligible and 47 participated in the study. Two health status questionnaires, the Sickness Impact Profile (SIP) and the Short-form 36 (SF-36), were mailed to participants with instructions to complete the surveys on the same day and return them by mail. Blood samples were obtained for bioavailable and total testosterone measurements. Pearson correlation coefficient analysis was used to compare the responses to the SF-36 and SIP and testosterone levels. Results: Of the eligible volunteers 69% participated and were able to self-administer the SIP and the SF-36. Summation scores for the surveys were above those reported in similar age populations. Perfect scores were reported frequently in all subsets of the SIP; perfect scores were reported in 43-92% of men on various subscales. The responses to the SF-36 were also frequently perfect although perfect scores ranged from 2 to 82% on various subsets. There was moderate correlation between the results from the two surveys. There was no correlation between age, SIP or SF-36 and testosterone level. Conclusions: Healthy older men volunteering for clinical research were able to self-administer both the SIP and SF3-6. Responses to both surveys were skewed toward perfect scores; the SIP failed to reveal many men with functional deficits. Bioavailable testosterone levels did not predict perceived health in this group of men.     

Die Auswirkungen von Neid auf individuelle Leistungen: Ergebnisse einer Panelanalyse

Relative income differences are likely to lead to envy within a reference group. Envy in turn influences social behavior and individual performance. While positional concerns are apparent in daily life, empirical evidence is rare in the economic literature. This paper investigates the impact of the relative income position on individuals’ performance or productivity. As ?performance“ is difficult to measure we turn to soccer players whose performance has been well documented. The broad sample covers eight seasons of the German premier soccer league (Bundesliga) between 1995 and 2004, and includes 1040 players, a salary proxy and several performance variables. The results show that player performance is strongly affected by relative income position. A disadvantage in the relative income position reduces productivity. The larger the income differences within a team, the stronger are the effects of positional concern. Team composition also significantly affects behaviour.     

Leaving an Institution in Flanders (Belgium): A Road to Homelessness?

People living in an institution will leave this residential context one day and have to proceed to a stable independent way of living. This transition is not without difficulties as it turns out this socially vulnerable group runs an increased risk of becoming homeless. Research in Flanders (Belgium) has shown that a considerable share of the homeless population has previously stayed in an institutional setting, mostly in youth care (48.7%), psychiatric (34.4%) and penitentiary (33.1%) institutions. Moreover, the share of homeless people with a history in one of these institutions has increased in the past decades. Institution leavers, face at least three obstacles to a stable housing situation in Flanders: a lack of affordable housing, a lack of access to (non-residential) social assistance and personal difficulties in coping with living independently. Yet, there are several programs that support institution leavers and prepare them for the transition to an independent living situation and legal developments that strengthen their position in society and on the housing market. In this paper, we explore these initiatives and developments in three case studies (Antwerp, Ghent and Leuven). Based on in-depth interviews with “street-level bureaucrats” who work in these institutions (youth care, psychiatric and penitentiary settings), social support services and social housing organizations, we reconstruct the pathways of institution leavers to the housing market, the support they receive and the experienced difficulties.     

A Quality Risk Management Model Approach for Cell Therapy Manufacturing

International regulatory authorities view risk management as an essential production need for the development of innovative, somatic cell‐based therapies in regenerative medicine. The available risk management guidelines, however, provide little guidance on specific risk analysis approaches and procedures applicable in clinical cell therapy manufacturing. This raises a number of problems. Cell manufacturing is a poorly automated process, prone to operator‐introduced variations, and affected by heterogeneity of the processed organs/tissues and lot‐dependent variability of reagent (e.g., collagenase) efficiency. In this study, the principal challenges faced in a cell‐based product manufacturing context (i.e., high dependence on human intervention and absence of reference standards for acceptable risk levels) are identified and addressed, and a risk management model approach applicable to manufacturing of cells for clinical use is described for the first time. The use of the heuristic and pseudo‐quantitative failure mode and effect analysis/failure mode and critical effect analysis risk analysis technique associated with direct estimation of severity, occurrence, and detection is, in this specific context, as effective as, but more efficient than, the analytic hierarchy process. Moreover, a severity/occurrence matrix and Pareto analysis can be successfully adopted to identify priority failure modes on which to act to mitigate risks. The application of this approach to clinical cell therapy manufacturing in regenerative medicine is also discussed.     

On Bayesian estimators in multistage binomial designs

A new class of Bayesian estimators for a proportion in multistage binomial designs is considered. Priors belong to the beta-J distribution family, which is derived from the Fisher information associated with the design. The transposition of the beta parameters of the Haldane and the uniform priors in fixed binomial experiments into the beta-J distribution yields bias-corrected versions of these priors in multistage designs. We show that the estimator of the posterior mean based on the corrected Haldane prior and the estimator of the posterior mode based on the corrected uniform prior have good frequentist properties. An easy-to-use approximation of the estimator of the posterior mode is provided. The new Bayesian estimators are compared to Whitehead's and the uniformly minimum variance estimators through several multistage designs. Last, the bias of the estimator of the posterior mode is derived for a particular case.     

Flexicurity in Belgium: A reform proposal based on economic principles

Belgium's systems of unemployment insurance and employment protection legislation were set up in the context of typically enduring and stable relationships between workers and firms. Economic globalization and rapid technological and organizational change, however, are now demanding more flexibility of both workers and firms. As a result, current labour market institutions are in urgent need of reform to reconcile such increased flexibility with adequate security for workers. Though the call for a “flexicurity” approach is not new, there is no single view of what institutional model the latter implies. This paper proposes a reform explicitly guided by economic principles.     

Expressing Induced Emotions Through Free Dance Movement

The aim of this study was to examine the effect of two basic emotions, happiness and sadness, on dance movement. A total of 32 adult participants were induced to feel emotional states of either happiness or sadness and then danced intuitively to an emotionally ‘neutral’ piece of music, composed specifically for the experiment. Based on an Effort-Shape analysis of body movement, full body movement was captured and seven different movement cues were examined, in order to explore whether differences in corporeal articulations between the happy and sad condition existed. Results revealed that in the happy condition, participants moved faster, with more acceleration, and made more expanded and more impulsive movements than in the sad condition. Results are discussed with respect to possible consequences for future research on human movement.