Science & Technology

Displaying 41 - 50 of 696 articles
Penn Engineers Develop Filters That Use Nanoparticles to Prevent Slime Build-up
November 1, 2017
Filtration membranes are, at their core, sponge-like materials that have micro- or nanoscopically small pores. Unwanted chemicals, bacteria and even viruses are physically blocked by the maze of mesh, but liquids like water can make it through.
Luck Plays a Role in How Language Evolves, Penn Team Finds
November 1, 2017
Read a few lines of Chaucer or Shakespeare and you’ll get a sense of how the English language has changed during the past millennium. Linguists catalogue these changes and work to discern why they happened. Meanwhile, evolutionary biologists have been doing something similar with living things, exploring how and why certain genes have changed over generations.
Penn Researchers Demonstrate How to Control Liquid Crystal Patterns
November 1, 2017
When Lisa Tran set out to investigate patterns in liquid crystals, she didn’t know what to expect. When she first looked through the microscope, she saw dancing iridescent spheres with fingerprint-like patterns etched into them that spiraled and flattened as the solution they were floated in changed.
Penn’s Restoring Active Memory Project Adds Task and Patient Data to Publicly Available Human Brain Dataset
November 1, 2017
When the Restoring Active Memory program published its human intracranial brain recording and stimulation data in 2016, it was the largest publicly available dataset of its kind. The Penn project has now added to that store, releasing data for 102 more patients and for a new spatial navigation task developed by researchers at Columbia.
Geometry Plays an Important Role in How Cells Behave, Penn Researchers Report
October 31, 2017
Inspired by how geometry influences physical systems such as soft matter, researchers at the University of Pennsylvania have revealed surprising insights into how the physics of molecules within a cell affect how the cell behaves.
Targeting Enzyme in ‘Normal’ Cells May Impede Pancreatic Cancer’s Spread, Penn Vet Team Shows
October 27, 2017
Cancer of the pancreas is a deadly disease, with a median survival time of less than six months. Only one in 20 people with pancreatic cancer survives five years past the diagnosis. The reason is the cancer’s insidiousness; tumor cells hide deep inside the body, betraying no symptoms until late in the disease, when the cancer has almost invariably spread to other organs.
Penn Study Shows How Female Immune Cells Keep Their Second X Chromosome Shut Off
October 18, 2017
Autoimmune diseases tend to strike women more than men and having multiple X chromosomes could be the main reason why. While a process called X chromosome inactivation serves to balance out gene dosage between males and females, some genes on the “inactive X” chromosome in immune cells can sometimes escape this process, giving women an extra dose of immunity-related gene expression.
Penn Engineering: Octopus Camouflage Is Inspiration for Soft Robots and Inflatable Displays
October 18, 2017
In a blink of an eye, an octopus can transform from a colorful creature to a drab pile of rocks and plant life, indistinguishable from the surface it’s perched on.  This camouflage relies on specialized pigment organs, but what makes the octopus unique among animals is its ability to change the texture of its skin. Previously flat stretches can bulge out in patterns that complete the illusion.
Penn Engineering Establishes Intel Center for Wireless Autonomous Systems
October 18, 2017
The University of Pennsylvania’s School of Engineering and Applied Science has established the Intel Center for Wireless Autonomous Systems. The research group, made possible by a three-year, $1.5 million gift from Intel, will investigate how robots and other machines can best wirelessly communicate with each other in high-stakes situations.
Penn Physicists Help Spot Explosive Counterpart of LIGO/Virgo’s Latest Gravitational Waves
October 16, 2017
Masao Sako of the University of Pennsylvania was on vacation with his family when he got the news. The Laser Interferometer Gravitational-wave Observatory, or LIGO, had made a fifth detection of gravitational waves, which expand and contract space time.