Anabolic responses to resistance training in older men and women: a brief review

Resistance training has been shown to be the most effective exercise mode to induce anabolic adaptations in older men and women. Advances in imaging techniques and histochemistry have increased the ability to detect such changes, confirming the high level of adaptability that remains in aging skeletal muscle. This brief review presents a summary of the resistance-training studies that directly compare chronic anabolic responses to training in older (>60 years) men and women. Sixteen studies are summarized, most of which indicate similar relative anabolic responses between older men and women after resistance training. Relatively small sample sizes in most of the interventions limited their ability to detect significant sex differences and should be considered when interpreting these studies. Future research should incorporate larger sample sizes with multiple measurement time points for anabolic responses.     

GAMMA-BASED CLUSTERING VIA ORDERED MEANS WITH APPLICATION TO GENE-EXPRESSION ANALYSIS

Discrete mixture models provide a well-known basis for effective clustering algorithms, although technical challenges have limited their scope. In the context of gene-expression data analysis, a model is presented that mixes over a finite catalog of structures, each one representing equality and inequality constraints among latent expected values. Computations depend on the probability that independent gamma-distributed variables attain each of their possible orderings. Each ordering event is equivalent to an event in independent negative-binomial random variables, and this finding guides a dynamic-programming calculation. The structuring of mixture-model components according to constraints among latent means leads to strict concavity of the mixture log likelihood. In addition to its beneficial numerical properties, the clustering method shows promising results in an empirical study.     

Factors That Influence Willingness to Help the Homeless

Homelessness is an ongoing challenge for many families and individuals. Many struggle to meet their basic needs for food, clothing and shelter. Unfortunately, we know very little about the people who directly help homeless people meet these needs. The present study examines the relationships between empathy, religion, household income, political orientation, gender, race, and people's expressed willingness to assist the homeless. Results demonstrate a strong and consistent link between empathy and willingness to help. Moderately consistent associations are found for religion and race. Limitations, suggestions for further research, and for practical application are discussed.     

Immigration politics by proxy: state agency in an era of national reluctance

ABSTRACT

While attempts to reform immigration policy have stalled in the U.S. Congress, statehouses across the country are responsible for an explosion in immigration lawmaking. This study uses an intergovernmental relations framework to identify shifting allocations of authority and contested scales of jurisdiction that now characterise the U.S. immigration policy. It presents an analysis of more than 2200 state bills passed over eight years (2006–2013), and supplements this with a case study of drivers’ licence and identification laws. The study is unique in its consideration of the ways that dispersed authority in multi-level systems may amplify rather than defuse contentious immigration politics.     

A Bootstrap Approach for Testing Marginal Independence Between Two Categorical Variables When Subjects Have Repeated Responses

To assess independence in two-way contingency tables, the Pearson chi-square test or Fisher’s exact test are typically used. These tests assume that each subject contributes at most one count to only one table cell (e.g., sex versus blood type). In other situations, each subject may have more than one count contributing to the table and these counts may occur in different cells of the table. One may wish to test independence, adjusting for the within-subject correlation. We provide a simple nonparametric bootstrap approach and assess its performance through simulation studies. The method is illustrated on subjects with multiple mental health presentations to Emergency Departments.     

After the wave-the Centrelink Social Work response offshore

Communities worldwide were affected by the tsunamis that struck a dozen Indian Ocean nations on 26 December 2004. More than 300,000 people were killed or left missing as a result of the tragedy. The Australian Government played a key role in the disaster response overseas and in Australia. As part of a whole-of-government response to the crisis, eight Centrelink Social Workers were deployed to tsunami-affected areas for two weeks after the initial disaster to provide personal support to Australian victims and their families. This paper presents the service delivery framework adopted offshore and delineates the role undertaken by the social workers. Drawing on their practice experience, the paper examines some of the challenges, dilemmas, learnings and implications for future service delivery.