Science & Technology

Displaying 31 - 40 of 696 articles
Penn Neuroscientists Construct First Whole-brain Map Showing Electrical Connections Key to Forming Memories
November 22, 2017
A team of neuroscientists at the University of Pennsylvania has constructed the first whole-brain map of electrical connectivity in the brain based on data from nearly 300 neurosurgical patients with electrodes implanted directly on the brain. The researchers found that low-frequency rhythms of brain activity, when brain waves move up and down slowly, primarily drive communication between the frontal, temporal and medial temporal lobes, key brain regions that engage during memory processing. 
Four Penn Professors Among 2017 Class of AAAS Fellows
November 20, 2017
Four members of the University of Pennsylvania faculty have been named Fellows of the American Association for the Advancement of Science. Election as an AAAS Fellow is an honor bestowed upon members of AAAS, the world’s largest general scientific society, by their peers.
Penn Engineers Develop Microchip Laser Stabilizer, Enabling Faster Data Transfer
November 20, 2017
With streaming movies and UltraHD television taking more and more bandwidth, there is a race to deliver data into people’s homes as quickly as possible. Light-based fiber optic connections promise far faster data rates than standard electricity-based coaxial cables, so making laser sources smaller, cheaper and more stable is a high priority for engineers.
‘Brazil Nut Effect’ Helps Explain How Rivers Resist Erosion, Penn Team Finds
November 20, 2017
Pop the top off a can of mixed nuts and, chances are, Brazil nuts will be at the top. This phenomenon, of large particles tending to rise to the top of mixtures while small particles tend to sink down, is popularly known as the “Brazil nut effect” and more technically as granular segregation. Look down at the top of a riverbed and it’s easy to draw a parallel: the top of a riverbed is typically lined with larger cobbles, while finer sand and small gravel particles make up the deeper layers.
Penn Senior Barbara Biney Is Unlocking the Genetic Secrets of Heartworm-resistant Mosquitoes
November 9, 2017
By Erica Andersen Certain mosquitoes don’t get heartworm, and Barbara Biney was keen to find out why.
Taking Blood Using ‘Push-Pull’ Method Gets Accurate Results With Fewer Pokes, Penn Study Shows
November 9, 2017
A new study by University of Pennsylvania veterinary researchers has found that blood samples collected from an intravenous catheter using a special “mixing” technique are as accurate as those collected via venipuncture, in which a needle is used to access the vein directly.
Practical Lessons for Penn Students: Talking Water in the Nation’s Capital
November 9, 2017
For some students, it was their first time in Washington. (Photo courtesy of Jon Freedman)
What Can Twitter Reveal About People With ADHD? Penn Researchers Provide Answers
November 8, 2017
People with attention-deficit/hyperactivity disorder tend to tweet using words like “hate” or “disappointed,” messages related to lack of focus, self-regulation, intention and failure and expressions of mental, physical and emotional exhaustion, according to research from Sharath Guntuku, Lyle Ungar, J. Russell Ramsay and Raina Merchant.
Penn Researchers Working to Mimic Giant Clams to Enhance the Production of Biofuel
November 2, 2017
Alison Sweeney of the University of Pennsylvania has been studying giant clams since she was a postdoctoral fellow at the University of California, Santa Barbara. These large mollusks, which anchor themselves to coral reefs in the tropical waters of the Indian and Pacific oceans, can grow to up to three-feet long and weigh hundreds of pounds.
Penn Biologists Show How Chromosomes ‘Cheat’ for the Chance to Get Into an Egg
November 2, 2017
Each of your cells contains two copies of 23 chromosomes, one inherited from your father and one from your mother. Theoretically, when you create a gamete — a sperm or an egg —  each copy has a 50-50 shot at being passed on. But the reality isn’t so clearcut.