In "Traffic Without Police," University of Arkansas law professor Jordan Blair Woods articulates a new legal framework for traffic enforcement, one that separates it from critical police functions, such as preventing and deterring crime, conducting criminal investigations and responding to emergencies.
States with stricter firearms laws reported lower suicide and homicide rates, according to a Rutgers study.
Careful criminals usually clean a scene, wiping away visible blood and fingerprints. However, prints made with trace amounts of blood, invisible to the naked eye, could remain. Dyes can detect these hidden prints, but the dyes don't work well on certain surfaces. Now, researchers reporting in ACS Applied Materials & Interfaces have developed a fluorescent polymer that binds to blood in a fingerprint -- without damaging any DNA also on the surface -- to create high-contrast images.
Concern tends to ratchet up a notch when pollution enters the river runoff discussion on a national scale, specifically when smaller, navigable intrastate bodies of water push pollution into larger interstate waters often involved in commerce (i.e. the Mississippi River, Great Lakes, Ohio River).
A real-life forensic puzzle inspired University of Illinois at Chicago and Iowa State University researchers to explore the physics involved, and in Physics of Fluids, they present theoretical results revealing an interaction of the incoming vortex ring of propellant muzzle gases with backward blood spatter. A detailed analytical theory of such turbulent self-similar vortex rings was given by this group in earlier work and is linked mathematically to the theory of quantum oscillators.
To search for answers about how blood droplets from a gunshot wound can reverse direction while in flight, researchers explored the influence of propellant gases on blood backspatter. In Physics of Fluids, they report using numeric modeling to capture the behavior of gun muzzle gases and predict the reversal of blood droplet flight, which was captured experimentally. Their experiments also show the breakup of blood droplets, a future extension of their modeling efforts.
A new study classifies different types of wildlife traffickers and sellers in two of Central Africa's growing urban centers, providing new insight into the poorly understood urban illegal wildlife trade.
Monitoring environmental compliance is a particular challenge for governments in poor countries. A new machine learning approach that uses satellite imagery to pinpoint highly polluting brick kilns in Bangladesh could provide a low-cost solution. (Watch video: https://www.youtube.com/watch?v=LHvRgKmJOK8)
A study published this week in The Lancet Public Health examines how we can use our income assistance systems to address drug use and drug-related harm.
A recent study indicates that a US ban on the use of tanning beds among minors would prevent thousands of cases of melanoma in adolescents and would save millions of dollars in healthcare costs. The findings are published early online in CANCER, a peer-reviewed journal of the American Cancer Society.