The role of center of mass kinematics in predicting peak utilized coefficient of friction during walking

Slips frequently occur when the friction required between the foot and floor exceeds available surface slip resistance. To date, the ability to identify variables that predict an individual's friction needs during walking, or utilized coefficient of friction (COFU), remains limited. Understanding COFU in the context of pedestrian/walkway accidents is important as individuals who demonstrate higher COFU are at a greater risk of slipping. This study determined if whole body center of mass (CM) kinematics were predictive of peak COFU during walking. Ground reaction forces and kinematic data were recorded simultaneously as subjects walked. Stepwise regression analysis determined that the combination of the subject's CM-to-center-of-pressure angle and CM anterior (i.e., forward) velocity predicted 62% of the variance in peak COFU during weight acceptance (p < 0.001). The identified relationships between CM kinematics and peak COFU provide insight into how gait and individual anthropometric characteristics may increase risk for slip initiation.     

Methanol Detected in a Subdural Hematoma as an Embalming Artifact

Analysis of subdural hematomata has been used to suggest antemortem drug concentrations, with the assumption that materials within the hematoma are less subject to metabolism or degradation during any survival period and postmortem interval. We report the case of an 87‐year‐old woman whose death had not been reported to the coroner's office until postembalming. Autopsy revealed a traumatic brain injury with subdural hematoma causing a mass effect. Testing of the clot indicated a methanol concentration of 51.8 mg%. No additional analyses were detected. These findings suggest that methanol can be present in a postmortem hematoma sample, yet not represent a poisoning. Our findings also suggest that while the interior of hematomata do not necessarily represent completely “protected space” from postmortem diffusion of some blood constituents, such diffusion is not facile, and analysis may still provide useful indications of antemortem drugs present, if not actual concentrations.     

The Direction of Violence Against Women Research and Evaluation

Although researchers have made numerous advances in the understanding of the nature, extent, and dynamics of violence against women (VAW), there is an ever-increasing need for data used in academic research and within policy decision-making to be collected via rigorous methodological designs to accurately measure the incidence and impact of VAW. What is now needed are research collaborations within an interdisciplinary research cluster that will expand understanding of the complex nature of VAW. The current article details an agenda or “call to action” to address deficiencies and advance VAW research, in addition to informing VAW intervention and prevention efforts.     

Preferential trade agreements and power asymmetries: the case of technological protection measures in Australia

Since the 1980s states have sought to harmonise economic standards to aid the flow of goods, services and finance across borders. The founding agreements of the World Trade Organisation (WTO), for example, harmonised standards on services, intellectual property and investment. However, mutlilateral trade negotiations in the WTO have since stalled. In response, the United States (US) has engaged in forum shopping, using preferential trade agreements at the bilateral, regional and multinational level to harmonise international standards. This article argues that through forum shopping the US has been able to export standards that support the commercial interests of US-based industries more than they encourage economic exchange across borders. Furthermore, because power asymmetries are starker in preferential trade negotiations smaller and middle power states should not enter trade agreements, which include regulatory harmonisation. This is illustrated with the case of the US-Australia free trade agreement, looking specifically at a copyright standard known as technological protection measures (TPMs). It was clear before, during and after the agreement was signed that Australia’s existing standard on TPMs was more popular than the US-style standard. Nevertheless, a US-style standard is in effect domestically because of the trade agreement.     

Understanding Leadership in Public Administration: The Biographical Approach

This essay reviews the range of literature that uses a biographical approach to probe leadership in public administration. What are the variations in this approach? What have we learned? What should be done in the future? The genre is examined through several books and articles that have studied agency leaders and government departments.