Mathematically modeling HIV drug pharmacodynamics

3-D rendering of a colony of pathogen viruses. Credit: frenta / Masterfile 37 million people around the world today live with Human Immunodeficiency Virus (HIV), which is responsible for roughly 1.1 million deaths caused by AIDS-related conditions. The virus replicates by inserting itself into the genetic code of CD4+ memory T-cells, human immune cells essential…

Scientists see order in complex patterns of river deltas

The world’s river deltas come in many complex and diverse patterns, as demonstrated by those depicted above (from top to bottom, left to right): the Lena (Russia), Mossy (Canada), Ebro (Spain), Niger (Nigeria), Amazon (Brazil), Ganges-Brahmaputra-Meghna (Bangladesh and India), Mekong (Vietnam), Wax Lake (Louisiana), Colville (Alaska), Parana (Argentina) and Mississippi (Louisiana) deltas. Yet nearly all…

How close to invisible can a mirror be?

Credit: US Environmental Protection Agency (Phys.org)—In 2011, mathematicians Alexander Plakhov and Vera Roshchina proved that objects with mirror surfaces cannot be perfectly invisible. Now in a new study, Plakhov has returned to the problem, asking just how close to invisible a mirror-surfaced object can be. Using concepts from billiards and optics, he has shown that…

Tim Poston obituary

My friend and colleague Tim Poston, who has died aged 72, had an unorthodox academic career that combined pure mathematics with physics, engineering, computer science and medicine. He also co-authored two science-fiction novels. He was born in St Albans, Hertfordshire, to Ralph, a broadcaster and Anglican priest, and his wife, Mary (nee King), a teacher…

JCU team's winning basketball formula

Credit: CC0 Public Domain James Cook University scientists have come up with a winning formula for basketball teams looking to take home Olympic gold. JCU Associate Professor Anthony Leicht and Dr Carl Woods, along with Dr Miguel Gomez from Spain, analysed every moment of 156 men’s basketball games played at the last four Olympics. …