Photoluminescent display absorbs, converts light into energy

By replacing the phosphor screen in a laser phosphor display (LPD) with a luminescent solar concentrator (LSC), one can harvest energy from ambient light as well as display high-resolution images. "Energy-harvesting laser phosphor display and its design considerations," published recently by SPIE, the international society for optics and photonics, in the Journal of Photonics for Energy, describes the development, processes, and applications of an LPD.

In a proof-of-concept experiment, lead author Ichiro Fujieda and his collegeagues at Ritsumeikan University fabricated a 95 × 95 × 10 mm screen by sandwiching a thin layer of coumarin 6 with two transparent plates. These plates guided the photoluminescent (PL) photons emitted in both directions toward their edge surfaces. After removing the light source in a DMD-based commercial grade projector and feeding a blue laser beam into its optics, the screen generated green images.

Scientists Say Agriculture Is Good for Honey Bees

While recent media reports have condemned a commonly used agricultural pesticide as detrimental to honey bee health, scientists with the University of Tennessee Institute of Agriculture have found that the overall health of honey bee hives actually improves in the presence of agricultural production.
The study, “Agricultural Landscape and Pesticide Effects on Honey Bee Biological Traits,” which was published in a recent issue of the Journal of Economic Entomology, evaluated the impacts of row-crop agriculture, including the traditional use of pesticides, on honey bee health. Results indicated that hive health was positively correlated to the presence of agriculture. According to the study, colonies in a non-agricultural area struggled to find adequate food resources and produced fewer offspring.

NASA to Measure Greenhouse Gases Over the Mid-Atlantic Region in May

In May, a team of Goddard scientists will begin measuring greenhouse gases over the Mid-Atlantic region — an area chosen in part because it encompasses a range of vegetation, climate, and soil types that would influence the exchange of carbon dioxide and methane between the Earth and the atmosphere.

The airborne campaign, called the Carbon Airborne Flux Experiment, or CARAFE, could help scientists better understand the exchange process, also known as flux, and improve computer models that predict Earth’s carbon sinks, natural or artificial areas that absorb carbon dioxide or methane.

Antarctic Peninsula ice more stable than previously thought

Glacier flow at the southern Antarctic Peninsula has increased since the 1990s, but a new study has found the change to be only a third of what was recently reported.

Avian Flu Testing of Wild Ducks Informs Biosecurity and Can Reduce Economic Loss

Ducks in North America can be carriers of avian influenza viruses similar to those found in a 2016 outbreak in Indiana that led to the losses of hundreds of thousands of chickens and turkeys, according to a recent study.

Protection of forests 'fundamental to security of humanity's place on this planet,' UN Forum told

Kick-starting action on the recently-adopted Global Forest Goals to protect, sustainably manage and increase world’s forest area will be a key focus for delegations gathered in New York for the twelfth session of the UN Forum on Forests, which opened today at United Nations Headquarters.

Earthquakes Can Make Thrust Faults Open Violently and Snap Shut

It is a common trope in disaster movies: an earthquake strikes, causing the ground to rip open and swallow people and cars whole. The gaping earth might make for cinematic drama, but earthquake scientists have long held that it does not happen.

Mice with missing lipid-modifying enzyme heal better after heart attack

Two immune responses are important for recovery after a heart attack — an acute inflammatory response that attracts leukocyte immune cells to remove dead tissue, followed by a resolving response that allows healing.

New coral bleaching database to help predict fate of global reefs

A UBC-led research team has developed a new global coral bleaching database that could help scientists predict future bleaching events.

Rock Samples Indicate Water is Key Ingredient for Crust Formation

By examining the cooling rate of rocks that formed more than 10 miles beneath the Earth’s surface, scientists led by The University of Texas at Austin Jackson School of Geosciences have found that water probably penetrates deep into the crust and upper mantle at mid-ocean spreading zones, the places where new crust is made. The finding adds evidence to one side of a long-standing debate on how magma from the Earth’s mantle cools to form the lower layers of crust.

Nick Dygert, a postdoctoral fellow in the Jackson School’s Department of Geological Sciences, led the research which was published in May in the print edition of Earth and Planetary Science Letters. Collaborators include Peter Kelemen of Colombia University and Yan Liang of Brown University.