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| Face shape influences mask fit, suggests problems with double masking against COVID-19 Posted: 03 May 2022 08:05 AM PDT In a new study, researchers used principal component analysis along with fluid dynamics simulation models to show the crucial importance of proper fit for all types of masks and how face shape influences the most ideal fit. They modeled a moderate cough jet from a mouth of an adult male wearing a cloth mask over the nose and mouth with elastic bands wrapped around the ears and calculated the maximum volume flow rates through the front of mask and peripheral gaps at different material porosity levels. |
| A better way to create compounds for pharmaceuticals, other chemicals Posted: 03 May 2022 06:15 AM PDT What do gunpowder, penicillin and Teflon all have in common? They were inventions that took the world by storm, but they were all created by complete accident. |
| Repairing tendons with silk proteins Posted: 03 May 2022 06:15 AM PDT Researchers have developed a silk composite for significantly improved tendon regeneration and repair. |
| What drives rechargeable battery decay? Depends on how many times you've charged it Posted: 28 Apr 2022 11:26 AM PDT How quickly a battery electrode decays depends on properties of individual particles in the battery -- at first. Later on, the network of particles matters more. |
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