RICHLAND, Wash. -- A new study reveals how pollution causes thunderstorms to leave behind larger, deeper, longer lasting clouds. Appearing in the Proceedings of the National Academy of Sciences November 26, the results solve a long-standing debate and reveal how pollution plays into climate warming. The work can also provide a gauge for the accuracy of weather and climate models.
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COLUMBIA, Mo. – Having human immunodeficiency virus (HIV), the virus that causes AIDS, can create many challenges for individuals physically, socially and emotionally. A University of Missouri researcher found that participating in photovoice, a process by which individuals document their lives by taking pictures, empowered women living with HIV to realize their strengths in the midst of their struggles.
Tropical cyclone Lehar, located in the Bay of Bengal, continues to gain intensity while heading toward the same area of India where a much weaker tropical cyclone Helen recently came ashore. NASA's TRMM satellite passed over Lehar and measured rainfall and cloud heights to give scientists an understanding of how the storm is behaving.
After making landfall near Darwin on Nov. 24, the remnants of Ex-Tropical Cyclone Alessia worked its way over to Australia's Northern Territory where it was seen from NASA's Aqua satellite. Aqua passed over the remnant low and captured infrared data on it that revealed that although the low remains disorganized, some strong thunderstorms were over the northwestern coast of the Northern Territory.
A study has shown that a daily probiotic drink changed how cells lining the nasal passages of hay fever sufferers reacted to a single out-of-season challenge. However, it did not lead to significant changes in hay fever symptoms, although this challenge test may not have accurately represented natural allergen exposure.
A week after launching a new orbiter to investigate the upper atmosphere of Mars, NASA is sending a sounding rocket to probe the atmosphere of Venus.
The Mars Atmosphere and Volatile Evolution, or MAVEN, mission launched from Cape Canaveral Air Force Station in Florida on Nov. 18. Now, the Venus Spectral Rocket, VeSpR for short, is scheduled to lift off from White Sands, N.M., on Nov. 25.
Scientists should take the conservative approach when searching for habitable zones where life-sustaining planets might exist, according to James Kasting, Evan Pugh Professor of Geosciences at Penn State, including when building Terrestrial Planet Finders.
When a star explodes as a supernova, it shines brightly for a few weeks or months before fading away. Yet the material blasted outward from the explosion still glows hundreds or thousands of years later, forming a picturesque supernova remnant. What powers such long-lived brilliance?
In the case of Tycho's supernova remnant, astronomers have discovered that a reverse shock wave racing inward at Mach 1000 (1000 times the speed of sound) is heating the remnant and causing it to emit X-ray light.
The Andaman Islands received an unwelcome visitor on November 25 in the form of Tropical Cyclone Lehar. NASA's Terra satellite captured a picture of the visitor as it was making its exit from the islands and into the Bay of Bengal.
Bethesda, MD – Shanghai's health care reforms as well as the findings of an eleven-country health care survey are published as Web First articles on Health Affairs' web site in November.
Shanghai's Health Care Reforms Explained.
Tropical Cyclone made landfall near Darwin, Australia on November 24 as a weak tropical storm as NASA's TRMM satellite passed overhead and measured its rainfall.
Composite materials are of increasing interest to physicists. Typically, they are made of electrically conducting elements - such as spherical metallic or elongated carbon particles - embedded in an insulating glass or a polymer matrix. Their controllable electrical resistivity, combined with their light and flexible properties, makes them suited for applications in flexible electronics. Now, a theoretical model, confirmed experimentally, elucidates how electrical resistivity varies with the concentration of the particles in these composite materials.
Cyber threats are rapidly emerging as one of the primary security concerns for the nation and global community as targeted cyber attacks can cause severe consequences to critical infrastructure and sectors of the economy. Recent calls for action, including President Obama's Executive Orders 13636 and Presidential Policy Directive 21, have brought the concept of "resilience" in the face of cyber attacks to the forefront of the nation's consciousness. In a recent special issue of Springer's journal Environment Systems & Decisions, Dr.
Our Galaxy may have been swallowing "pills" — clouds of gas with a magnetic wrapper — to keep making stars for the past eight billion years.
That's the conclusion of CSIRO astronomer Dr Alex Hill, lead author of a study of the Smith Cloud, a large gas cloud falling into our Galaxy from intergalactic space.
"Clouds like this may provide the fuel for our Galaxy to make stars," Dr Hill said.
High-speed 'jets' spat out by black holes pack a lot of power because they contain heavy atoms, astronomers have found.
Black-hole jets recycle matter and energy into space and can affect when and where a galaxy forms stars.
"Jets from supermassive black holes help determine a galaxy's fate — how it evolves," said CSIRO's Dr Tasso Tzioumis, a member of the research team.
"So we want to understand better the impact jets have on their environment."