With the number of city dwellers expected to double in the next 30 years, bringing the tally to 7 billion city inhabitants worldwide, urbanization poses a wide range of critical issues, including housing, education, food security, energy, crime, economic development, income equality and public health.
Adult stem cells and cancer cells have many things in common, including an ability to migrate through tiny gaps in tissue. Both types of cells also experience a trade-off when it comes to this ability; having a flexible nucleus makes migration easier but is worse at protecting the nucleus’ DNA compared to a stiffer nucleus.
Every year, nearly seven million children will die from preventable causes like diarrhea, pneumonia or measles before they reach the age of 5.
Three University of Pennsylvania faculty members are among this year’s Sloan Fellowship recipients. Since 1955, the Alfred P. Sloan Foundation has granted yearly fellowships to early-career scientists and scholars whose achievements and potential identify them the next generation of scientific leaders.
Early each morning this semester, Marine Corps Col. Andrew Wilcox awakes to the call of reveille in the silent darkness. By 07:30 hours, he’s conducting a mandatory leadership and ethics class for seniors in the Naval Reserve Officer Training Corps at the University of Pennsylvania.
For centuries, geologists have recognized that the rocks that line riverbeds tend to be smaller and rounder further downstream. But these experts have not agreed on the reason these patterns exist. Abrasion causes rocks to grind down and become rounder as they are transported down the river.
After hearing Arab music for the first time at a wedding a couple of years ago, University of Pennsylvania senior Idrees Syed was so enthralled with the sounds that he soon began taking drumming lessons in the Arab Music Ensemble percussion class at Penn.
“The sounds were just mesmerizing,” Syed says.
President Amy Gutmann says, “The completion of the renovated ARCH building marks a new focal point for cultural life on campus.”
When deciding what materials to use in building something, determining how those materials respond to stress and strain is often the first task. A material’s macroscopic, or bulk, properties in this area — whether it can spring back into shape, for example — is generally the product of what is happening on a microscopic scale.