The fall of Angkor has long puzzled historians, archaeologists and scientists, but now a University of Sydney research team is one step closer to discovering what led to the city's demise -- and it comes with a warning for modern urban communities.
Sydney may soon undergo a transition from a monocentric city with sprawling suburbs radiating from one CBD, to a polycentric model -- one marked by several sub-centres -- according to a recent study led by a multidisciplinary team at the University of Sydney. Topics: Greater Sydney Commission, urbanisation, urban sprawl, complex systems, transport, residential, suburbs
For decades researchers have studied materials from structures to see why and how they fail. Before catastrophic failure, there are individual cracks or dislocations that form, which are signals that a structure may be weakening. While researchers have studied individual dislocations in the past, a team from the University of Illinois at Urbana-Champaign, the University of Tennessee, and Oak Ridge National Laboratory has made it possible to understand how dislocations organize and react at nanoscale.
Global sustainability is important now more than ever due to increasing urban populations and the resulting stress it can have on natural resources. But increased populations in cities may lead to greater efficiency, as a team of Penn State researchers discovered when they analyzed the water footprint of 65 mid- to large-sized US cities.
Rice University scientists enhance micron-sized titanium dioxide particles to trap and destroy BPA, a contaminant in water with health implications. The robust particles can be recharged for reuse in water remediation.
Purdue University researchers have 3D-printed cement paste, a key ingredient of the concrete and mortar used to build various elements of infrastructure, that gets tougher under pressure like the shells of arthropods such as lobsters and beetles. The technique could eventually contribute to more resilient structures during natural disasters.
Scientists from Nanyang Technological University, Singapore have developed a technology where two robots can work in unison to 3D-print a concrete structure.
A new material that is as stiff as metal but flexible enough to withstand strong vibrations could transform the car manufacturing industry, say experts from the University of Surrey.
Ride-hailing accounts for an 83 percent increase in the miles cars travel for ride-hailing passengers in Denver's metro area, according to a new study, 'The impact of ride-hailing on vehicle miles traveled,' in the journal Transportation. CU Denver research found that for every 100 miles carrying passengers, Uber and Lyft drivers travel an additional 69 miles without a passenger. Conclusions: cities need better data about mobility-disrupting companies to inform policy decisions.
Princeton University researchers have proposed a US pipeline network that would capture, transport and store underground up to 30 million metric tons of carbon dioxide emissions each year -- an amount equal to removing 6.5 million cars from the road. The authors found that the network infrastructure would only be possible if tax credits passed by Congress in 2018 to encourage investment in carbon capture-and-storage technology are coupled with low-interest government financing.