Forensic pathologists have historically found several characteristics of the entrance wound invaluable in determining range of fire in gunshot fatalities. Among these characteristics are the pattern and constituents of any deposited material such as soot and/or gun powder residues. We describe a case in which the application of previously described characteristics, in the absence of laboratory testing and examination of the crime scene, would have led to an erroneous conclusion with potentially grave consequences. We suggest that all attempts be made to use available laboratory tests and to perform detailed examination of crime scenes in determining the circumstances surrounding fatal gunshot injuries.
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PNAS Nexus
January 2025
Southern Research Station, US Forest Service, 320 Green Street, Athens, GA 30602, USA.
Wildfires are growing in destructive power, and accurately predicting the spread and intensity of wildland fire is essential for managing ecological and societal impacts. No current operational models used for fire behavior prediction resolve critical fire-atmospheric coupling or nonlocal influences of the fire environment, rendering them inadequate in accounting for the range of wildland fire behavior scenarios under increasingly novel fuel and climate conditions. Here, we present a new perspective on a dominant fire-atmospheric feedback mechanism, which we term wildland fire entrainment (WFE).
View Article and Find Full Text PDFSci Rep
January 2025
Department of Neurobiology, Poznan University of Physical Education, Poznan, Poland.
Previously, boost and sag effects seen in unfused tetanic contractions have been studied exclusively at constant stimulation frequency. However, intervals between successive discharges of motoneurons vary during voluntary movements. We therefore aimed to test whether the extra-efficient force production at the onset of contraction (boost) occurs during stimulation with variable intervals, and to what extent it depends on the level of interpulse interval (IPI) variability and history of stimulation.
View Article and Find Full Text PDFPLoS Comput Biol
January 2025
Biorobotics Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
This study introduces a novel neuromechanical model employing a detailed spiking neural network to explore the role of axial proprioceptive sensory feedback, namely stretch feedback, in salamander locomotion. Unlike previous studies that often oversimplified the dynamics of the locomotor networks, our model includes detailed simulations of the classes of neurons that are considered responsible for generating movement patterns. The locomotor circuits, modeled as a spiking neural network of adaptive leaky integrate-and-fire neurons, are coupled to a three-dimensional mechanical model of a salamander with realistic physical parameters and simulated muscles.
View Article and Find Full Text PDFEcol Appl
January 2025
Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Fire shapes biodiversity in many forested ecosystems, but historical management practices and anthropogenic climate change have led to larger, more severe fires that threaten many animal species where such disturbances do not occur naturally. As predators, owls can play important ecological roles in biological communities, but how changing fire regimes affect individual species and species assemblages is largely unknown. Here, we examined the impact of fire severity, history, and configuration over the past 35 years on an assemblage of six forest owl species in the Sierra Nevada, California, using ecosystem-scale passive acoustic monitoring.
View Article and Find Full Text PDFIntroduction: Research has consistently shown that the prevalence of burnout symptoms (such as emotional and physical exhaustion, cynicism, or lack of interest in schoolwork, the sense of incompetence, or the feeling that you cannot be effective) in medical students is greater than the prevalence in the general population. Students with preexisting anxiety, depression, mood disorder or other psychological distress are more vulnerable to burnout. It is estimated that at least half of U.
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