UB aerospace engineer James Chen publishes a paper that extends classical kinetic theory into high-speed aerodynamics, including hypersonic speed, which begins at 3,836 mph or roughly five times the speed of sound. The new study and others by Chen in influential academic journals attempt to solve long-standing problems associated with high-speed aerodynamics.
The United States could fulfill its greenhouse gas emission pledge under the Paris Climate Agreement by virtually eliminating coal as an energy source by 2024, according to new research from Portland State University.
Boston University researchers, Xin Zhang, a professor at the College of Engineering, and Ghaffarivardavagh, a Ph.D. student in the Department of Mechanical Engineering, released a paper in Physical Review demonstrating it's possible to silence noise using an open, ringlike structure, created to mathematically perfect specifications, for cutting out sounds while maintaining airflow.
From the power grid to the PTA, society relies on networks connected to other networks at scales from across the office to around the world. Understanding how connected networks behave and how breakdowns can be identified, prevented or repaired involves mathematics, engineering and physics. Researchers at UC Davis and Caltech now show how complicated and surprising behavior can emerge in a ring of just eight oscillators.
Humans have a knack for finding patterns in the world around them. Researchers are building a model that shows how this ability might work, which they will describe at the 2019 APS March Meeting. The brain does more than just process incoming information, the researchers say. It constantly tries to predict what's coming next. The new model attempts to explain how people can make such predictions.
A new study debunks a popular, two-decade-old theory about the shape of networks.
Princeton researchers are exploring how cooperation arises in human societies, where people tend to cluster into various group types -- political, religious, familial, professional, etc. -- which they will describe at the 2019 APS March Meeting. Within such groups, people can cooperate or 'defect' and receive payoffs based on those exchanges. Cooperation, they observed, is most favored when allowing for the existence of 'loners' -- people who are temporarily not members of any group.
The federal government considers many factors when spending money to prevent structure fires. The key driver, however, is economic losses -- the greater the cost of fire within a state, the more aid that state is likely to receive. A new model emphasizes an additional factor: losses associated with human fatalities and injuries. That tweak throws the current system off-track, suggesting that some states receive an outsized share of fire protection money, while others are shortchanged.
In a paper published recently in Nature Physics, researchers present a dynamic dependency framework that can capture interdependent and competitive interactions between dynamic systems which are used to study synchronization and spreading processes in multilayer networks with interacting layers. "This dynamic dependency framework provides a powerful tool to better understand many of the interacting complex systems which surround us," they wrote.
Researchers at the University of Copenhagen have invented a chemical fingerprint that, when used with a phone app, reveals whether a product is genuine or a fake. The fingerprints have been tested and earned a 100 percent success rate.