A restaurant outbreak in China was widely reported as strong evidence of airflow-induced transmission of COVID-19, but it lacked a detailed investigation about exactly how transmission occurred. In Physics of Fluids, researchers at the University of Minnesota report using advanced simulation methods to capture the complex flows that occur when the cold airflow from air conditioners interacts with the hot plume from a dining table and the transport of virus-loading particles within such flows.
The snapping claws of male amphipods tiny, shrimplike crustaceans are among the fastest and most energetic of any life on Earth. Researchers reporting in the journal Current Biology on February 8 find that the crustaceans can repeatedly close their claws in less than 0.01% of a second, generating high-energy water jets and audible pops. The snapping claws are so fast, they almost defy the laws of physics.
Credit: University of Southampton
Scientists at the University of Southampton and University of Edinburgh have developed a flexible underwater robot that can propel itself through water in the same style as nature s most efficient swimmer - the Aurelia aurita jellyfish.
The findings, published in
Science Robotics, demonstrate that the new underwater robot can swim as quickly and efficiently as the squid and jellyfish which inspired its design, potentially unlocking new possibilities for underwater exploration with its lightweight design and soft exterior.
Co-author Dr Francesco Giorgio-Serchi, Lecturer and Chancellor s Fellow, at the School of Engineering, University of Edinburgh, said: The fascination for organisms such as squid, jellyfish and octopuses has been growing enormously because they are quite unique in that their lack of supportive skeletal structure does not prevent them from outstanding feats of swimming.
E-Mail
IMAGE: Biomedical engineers have developed a technique to observe wound healing in real time, discovering a central role for cells known as fibroblasts. The work is the first demonstration of a. view more
Credit: Jeroen Eyckmans, Juliann B. Tefft
WASHINGTON, January 19, 2021 Biomedical engineers developed a technique to observe wound healing in real time, discovering a central role for cells known as fibroblasts. The work, reported in
APL Bioengineering, by AIP Publishing, is the first demonstration of a wound closure model within human vascularized tissue in a petri dish.
Prior investigations of wound healing have used animal models, but healing in humans does not occur the same way. One difference is that wounds in mice and rats, for example, can heal without granulation tissue, a type of tissue critical to the healing of human wounds.