News by Subject Mathematics

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

A new statistical method that tests for equivalence, rather than difference, has a role to play in dismantling gender and publication biases in science. The authors believe the technique has broad applicability across disciplines and can help remove publication bias against "negative results," opening the door to a broader investigation of natural phenomena. The paper includes an example of the technique's use in a study comparing the structure of male and female Eastern Bluebird songs.

Researchers from MIT and Massachusetts General Hospital have developed an automated model that assesses dense breast tissue in mammograms -- which is an independent risk factor for breast cancer -- as reliably as expert radiologists. This marks the first time a deep-learning model of its kind has successfully been used in a clinic on real patients, according to the researchers. With broad implementation, the researchers hope the model can help bring greater reliability to breast density assessments across the nation.

A RUDN physicist demonstrated how to describe the shape of any symmetrical wormhole -- a black hole that theoretically can be a kind of a portal between any two points in space and time -- based on its wave spectrum. The research would help understand the physics of wormholes and better identify their physical characteristics. The article of the scientist was published in the Physics Letters B journal.

Economists have found that in the United States, watershed groups have had a positive impact on their local water quality.