Adding sound to electric vehicles improves pedestrian safety

While they decrease sound pollution, electric vehicles are so quiet, they can create a safety concern, particularly to the visually impaired. To address this, many governments have mandated artificial sounds be added to electric ...


Using optical beaming to power a portable 5G base station

Telecommunications company Ericsson has teamed up with a company called PowerLight Technologies to send power through the air to run a 5G base station. Both companies have posted the details on their respective websites.

Electronics & Semiconductors

Ultrasonic social distancing

Social distancing has been a critical component of the world's response to the COVID-19 pandemic. The idea being that keeping physical apart from other people will reduce the risk of a person spreading the respiratory virus ...

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Distance (or farness) is a numerical description of how far apart objects are. In physics or everyday discussion, distance may refer to a physical length, or an estimation based on other criteria (e.g. "two counties over"). In mathematics, a distance function or metric is a generalization of the concept of physical distance. A metric is a function that behaves according to a specific set of rules, and provides a concrete way of describing what it means for elements of some space to be "close to" or "far away from" each other.

In most cases, "distance from A to B" is interchangeable with "distance between B and A".

This text uses material from Wikipedia, licensed under CC BY-SA