Risky Lifestyles and Unintentional Firearms Fatalities

This state-level study departs from other investigations of unintentional firearms fatalities by examining the relationships between lifestyle choices, legislation, and accidental gun deaths. We find that the source of these deaths is very similar to those for unintentional fatalities from other mechanisms, such as motor vehicle accidents, residential fires, or occupational injuries. Unintentional mortality is consistently associated with state-level indicators of risky behavior, and to a lesser extent, inactivity. Moreover, we also examined the influences of child access prevention (safe storage), overall firearms laws, and background checks on firearms fatalities. Unlike previous research, we found that these legislative initiatives were not significantly associated with reductions in accidental shooting deaths. Our findings suggest that theories about unintentional fatalities will remain incomplete and harm reduction policies, including the public health model endorsed by many scholars, will not be fully effective if the role of risktaking and sensation-seeking behaviors as an important source of these tragedies is neglected

Sustainability Of Dual Water Distribution Systems For Fire Flow Condition

The objective of this study is to compare the sustainability of current water systems when a dual water distribution system (WDS) is used for the non-potable water purposes of fire protection, irrigation, and toilet flushing. Sustainability of urban WDS is evaluated in terms of hydraulic efficiency and water quality. The first step is to assess sustainability of an example urban WDS by using sustainability index (SI). The SI is measured by reliability, resiliency, and vulnerability performance indices. Pressure and water age are selected as main parameters to determine sustainability. Once the SIs for pressure and water age are calculated by using the extended period simulation in the U.S. Environmental Protection Agency EPANET, these parameters are aggregated into an overall score (SIoverall). The critical areas are identified and improved by either adding network elements (i.e. pumps, valves) or adding a second WDS (i.e. reclaimed WDS) to serve for non-potable water demand. Fire flow is added to the modified WDSs and the SI is calculated again. The proposed methodology and application for SI calculation of WDS proved to be a credible approach in identifying poor performance areas and improving water services. A dual WDS for fire flow, irrigation and toilet flushing can assist in providing sustainable water utilities in urban areas meeting future needs. A linear programming procedure is used to determine the minimum cost of the branched dual WDS

The organisational and human resource challenges facing primary care trusts : protocol of a multiple case study

BACKGROUND: The study is designed to assess the organisational and human resource challenges faced by Primary Care Trusts (PCTs). Its objectives are to: specify the organisational and human resources challenges faced by PCTs in fulfilling the roles envisaged in government and local policy; examine how PCTs are addressing these challenges, in particular, to describe the organisational forms they have adopted, and the OD/HR strategies and initiatives they have planned or in place; assess how effective these structures, strategies and initiatives have been in enabling the PCTs to meet the organisational and human resources challenges they face; identify the factors, both internal to the PCT and in the wider health community, which have contributed to the success or failure of different structures, strategies and initiatives. METHODS: The study will be undertaken in three stages. In Stage 1 the key literature on public sector and NHS organisational development and human resources management will be reviewed, and discussions will be held with key researchers and policy makers working in this area. Stage 2 will focus on detailed case studies in six PCTs designed to examine the organisational and human resources challenges they face. Data will be collected using semi-structured interviews, group discussion, site visits, observation of key meetings and examination of local documentation. The findings from the case study PCTs will be cross checked with a Reference Group of up to 20 other PCG/Ts, and key officers working in organisational development or primary care at local, regional and national level. In Stage 3 analysis of findings from the preparatory work, the case studies and the feedback from the Reference Group will be used to identify practical lessons for PCTs, key messages for policy makers, and contributions to further theoretical development

SYMAP: a potential multi-county regional planning tool

Call number: LD2668 .P7 1973 M3

Universal Scaling of Optimal Current Distribution in Transportation Networks

Transportation networks are inevitably selected with reference to their global cost which depends on the strengths and the distribution of the embedded currents. We prove that optimal current distributions for a uniformly injected d-dimensional network exhibit robust scale-invariance properties, independently of the particular cost function considered, as long as it is convex. We find that, in the limit of large currents, the distribution decays as a power law with an exponent equal to (2d-1)/(d-1). The current distribution can be exactly calculated in d=2 for all values of the current. Numerical simulations further suggest that the scaling properties remain unchanged for both random injections and by randomizing the convex cost functions.Comment: 5 pages, 5 figure