Too many nutrients can cause extensive loss of marshes
Salt marshes have been disintegrating and dying over the past two decades along the U.S. Eastern Seaboard and other highly developed coastlines without anyone fully understanding why. (more…)
A study of 544 star-forming galaxies shows that disk galaxies like our own Milky Way reached their current state as orderly rotating pinwheels much later than previously thought, long after much of the universe’s star formation had ceased.
Galaxies are in no hurry to grow up, a team of astronomers has discovered. A comprehensive study of hundreds of galaxies observed by the Keck telescopes in Hawaii and NASA’s Hubble Space Telescope has revealed an unexpected pattern of change that extends back 8 billion years, or more than half the age of the universe.
Researchers say the distant blue galaxies they studied are gradually transforming into rotating disk galaxies like our own Milky Way. Until now, it had not been clear how a galaxy’s organization and internal motion change over time, said Benjamin Weiner, assistant astronomer at the UA Steward Observatory and co-author of the paper describing the findings, which are published in The Astrophysical Journal. (more…)
What if the Ph.D. research becomes too complex for words? Dozens of candidates turned to the language of dance in the fifth annual national contest sponsored by Science Magazine. Diana Davis, a graduate student in mathematics, won the first-ever “Dance Your Ph.D.” prize in pure mathematics.
Math graduate student Diana Davis studies the symbolic dynamics that arise from cutting sequences on Veech surfaces and Bouw-Möller surfaces.
No idea what that means? It’s OK. She can show you. (more…)
UD prof leads photonics revolution to help researchers access high-tech foundry services
Michael Hochberg joined the University of Delaware in the spring of 2012 as an associate professor in electrical and computer engineering.
An industry leader in silicon photonics and large-scale photonic-electronic integration, Hochberg is renowned for establishing Optoelectronic Systems Integration in Silicon (OpSIS), a high-tech foundry service for silicon photonics in which the community shares the cost of fabricating complex chip-scale systems across many projects. (more…)
COLUMBUS, Ohio – Warming temperatures in Ohio are a key driver behind changes in the state’s landscape, and non-native plant species appear to be responding more strongly than native wildflowers to the changing climate, new research suggests.
This adaptive nature demonstrated by introduced species could serve them well as the climate continues to warm. At the same time, the non-natives’ potential ability to become even more invasive could threaten the survival of native species already under pressure from land-use changes, researchers say. (more…)
For women of mixed racial or ethnic backgrounds, a new method for measuring bone health may improve the odds of correctly diagnosing their risk of osteoporosis and bone fractures, according to a UCLA-led study.
Currently, assessing osteoporosis and the risk of fractures from small accidents like falls requires a bone density scan. But because these scans don’t provide other relevant fracture-related information, such as bone size and the amount of force a bone is subjected to during a fall, each patient’s bone density is examined against a national database of people with the same age and race or ethnicity. (more…)
There’s an old adage (with several variations) that California has four seasons: earthquake, fire, flood and drought. While Californians happily cede the title of Hurricane Capital of America to U.S. East and Gulf coasters, every once in a while, Mother Nature sends a reminder to Southern Californians that they are not completely immune to the whims of tropical cyclones. Typically, this takes the form of rainfall from the remnants of a tropical cyclone in the eastern Pacific, as happened recently when the remnants of Hurricane John brought rain and thunderstorms to parts of Southern California. But could a hurricane ever make landfall in Southern California?
The answer, as it turns out, is yes, and no. While there has never been a documented case of a hurricane making landfall in California, the Golden State has had its share of run-ins and close calls with tropical cyclones. In fact, California has been affected by at least a few tropical cyclones in every decade since 1900. Over that timeframe, three of those storms brought gale-force winds to California: an unnamed California tropical storm in 1939, Kathleen in 1976 and Nora in 1997. But the primary threat from California tropical cyclones isn’t winds or storm surge. It’s rainfall — sometimes torrential — which has led to flooding, damage and, occasionally, casualties. (more…)
Microsoft commemorates 30th Employee Giving Campaign with CEO Steve Ballmer and Chairman and Founder Bill Gates.
REDMOND, Wash. — Oct. 18, 2012 — Microsoft Corp. today commemorated its 30th Employee Giving Campaign and announced that U.S. employees raised $1 billion in cash since 1983 for approximately 31,000 nonprofits and community organizations around the world. CEO Steve Ballmer announced the milestone during a special town hall event at the Microsoft Redmond campus, which included Microsoft Chairman Bill Gates and Washington State Gov. Chris Gregoire.
“Today, I’m thrilled to announce that since our Employee Giving Campaign started in 1983, Microsoft employees have donated a total of $1 billion to more than 31,000 nonprofits around the world,” Ballmer said. “I’m incredibly proud of our employees, and this is truly a time to celebrate, not just because we’ve raised a record amount of funds, but also because together with our nonprofit partners, we have impacted and improved the lives of hundreds of millions of people.” (more…)
