However, the probability of lek persistence increased from 0.69 at 0 m to 0.89 at 30 km from turbines, and most abandoned lek sites were located 0.9 for leks of 10 or more males. During the postconstruction period, distance to nearest turbine did not have a significant effect on the probability of lek persistence. ![]() In our analyses of lek attendance, the annual probability of lek persistence during the preconstruction period was ~0.9. Our genetic data were based on genotypes of 1,760 females, males and chicks that were screened with a set of 27 microsatellite markers that were optimized in the lab. Our demographic and movement data from the 6-year study period at the Smoky Hills site included 23 lek sites, 251 radio-marked females monitored for 287 bird-years, and 264 nesting attempts. Our analyses of pre- and postconstruction impacts are based on an analysis of covariance design where we modeled population performance as a function of treatment period, distance to eventual or actual site of the nearest wind turbine, and the interaction of these factors. We addressed seven potential impacts of wind power development on prairie chickens: lek attendance, mating behavior, use of breeding habitat, fecundity rates, natal dispersal, survival rates, and population numbers. Where relevant, we present preconstruction data from our field more » studies at reference sites in the northern Flint Hills (2007-2009) and southern Flint Hills (2006-2008). Our project report is based on population data for prairie chickens collected during a 2-year preconstruction period (2007-2008), a 3-year postconstruction period (2009-2011) and one final year of lek surveys (2012). Only 1 of 3 sites was developed for wind power, the 201MW Meridan Way Wind Power Facility at the Smoky Hills site in northcentral Kansas. We investigated the impacts of wind power development on the demography, movements, and population genetics of Greater Prairie-Chickens (Tympanuchus cupido) at three sites in northcentral and eastern Kansas for a 7-year period. Recommendations for modifications to current approaches used in crime labs for serial number recovery, as well as suggestions for future work, conclude this document. Investigations into the serial number recovery in a series of ferromagnetic firearms (both steel and certain stainless steels) will then be presented. This is followed by a description of how such investigations were simulated on lab samples, including a look at how the microstructure of a given steel will affect its performance in the test. The scope of this report includes a brief overview of the magnetic particle inspection method in general and its applications to forensic serial number recovery. Additionally, some aspects of surface preparation of firearm samples prior to number recovery were included in this work. Also investigated are the effects of the nature of the sample magnetization (AC, rectified DC, and true more » DC) and the use of various detection media, such as visible powders and fluorescent sprays, on test outcome. This includes attempts to understand the magnetic characteristics of different steels that affect their performance in the test, such as varying results for carbon steels and alloy steels after different thermal and forming treatments. ![]() The aim of this project is to investigate specific aspects of magnetic particle inspection for serial number recovery. This is not surprising when one considers that little formal development has apparently evolved for use in such investigations since the publication of seminal work in this area some time ago. Crime labs have reported low success rates using these tools. ![]() Equipment specialized for this detection is not used in these attempts a portable magnetic yoke used typically for flaw detection on large weldments or structures, along with dry visible magnetic powders, have been the tools of criminologists working in this area. The use of this method is predicated on the detection of metal deformation present under stamped serial numbers after the visible stamp has been removed. ![]() One method used by crime labs to recover obliterated serial numbers in steel firearms (ferrous samples) is the magnetic particle technique.
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