Landing multi-rotor drones smoothly is difficult. Complex turbulence is created by the airflow from each rotor bouncing off the ground as the ground grows ever closer during a descent. This turbulence is not well understood nor is it easy to compensate for, particularly for autonomous drones. That is why takeoff and landing are often the two trickiest parts of a drone flight. Drones typically wobble and inch slowly toward a landing until power is finally cut, and they drop the remaining distance to the ground.
* This article was originally published here
Monday, 27 May 2019
Drinking red wine for heart health? read this before you toast
For years, studies have shown a relationship between drinking a moderate amount of red wine and good heart health, but experts say it's important to understand what that means before you prescribe yourself a glass or two a day.
* This article was originally published here
* This article was originally published here
A gut check for heart failure patients
Heart failure patients who consume more dietary fibre tend to have healthier gut bacteria, which is associated with reduced risk of death or need of a heart transplant. The fibre study was presented today at Heart Failure 2019, a scientific congress of the European Society of Cardiology (ESC).
* This article was originally published here
* This article was originally published here
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