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Using Frons Width to Differentiate Blow Fly Species (Diptera: Calliphoridae) Phormia regina (Meigen) and Protophormia terraenovae (Robineau‐Desvoidy)
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Sarah V. Langer B.Sc.F.S. Christopher J. Kyle Ph.D. David V. Beresford Ph.D. 《Journal of forensic sciences》2017,62(2):473-475
Protophormia terraenovae (Robineau‐Desvoidy) (Diptera: Calliphoridae) and Phormia regina (Meigen) (Diptera: Calliphoridae) are morphologically similar blow fly species commonly used for estimating postmortem intervals. Field collection and storage of adults can result in color changes, in particular on calypters and palps; often collected specimens show damage such as wing fray or fungal growth. We measured the frons width: total head width ratio using photographs (ImageJ version 1.49) to differentiate these two species. Both sexes were distinguishable to species, with the greatest difference between males: 12.34% P. terraenovae versus 1.62% P. regina, less so for females: 40.25% P. terraenovae, versus 33.65% P. regina. Incorporating this feature into future blow fly keys would help with distinguishing field‐caught specimens when other features are obstructed. 相似文献
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Over the past decade, much has been written about the results of reinventing government. Most research has examined the effects of executive or managerial perspectives. Using David Rosenbloom's competing perspectives model, we examine Medicaid managed care programs for children with special health care needs to illustrate the influence of legislative and judicial institutional perspectives on the reinvention movement. Legislative and judicial responses to the reinvention of Medicaid managed care reveal the outer limits of what managed care and related executive reforms can accomplish in a Constitutional system that is based on checks and balances among competing institutional perspectives. Furthermore, relative to Medicaid managed care, legislative and judicial responses conserve public responsibility to society's most vulnerable populations. In the long run, the balance of institutional perspectives and values—not managerial innovation per se—will influence public administration. 相似文献
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Recent tragedies such as Hurricane Katrina, 9/11, and the 2008 Sichuan Earthquake have revealed a need for methods to evaluate and plan for the impact of extreme events on critical infrastructure. In particular, awareness has been raised of the threat that a major disruption will lead to cascading failures that cross boundaries between interdependent infrastructure sectors, greatly magnifying human and economic impacts. To assist in planning for such extreme events, researchers are developing modeling tools to aid in making decisions about how best to protect critical infrastructures. We present some of the capabilities of this modeling approach as well as some of the challenges faced in developing such applications based on our experience with the Critical Infrastructure Protection Decision Support System (CIPDSS) model, developed for use by the Department of Homeland Security. A set of disruptions to road and telecommunication infrastructures is implemented in CIPDSS and the modeled disruptions to the original infrastructure as well as cascading effects on other infrastructure sectors are discussed. These simulations provide insights into the potential of this approach. 相似文献
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