12/09/2017

Sensor awakens only in the presence of a signal of interest

Here's your task. Build a tiny sensor that detects a signature of infrared (IR) wavelengths characteristic of a hot tailpipe, a wood fire, or perhaps even a human being. Design the sensor so that it can remain dormant and ...

Are cryptocurrencies a dream come true for cyber-extortionists?

When malicious software takes over computers around the world, encrypts their data and demands a ransom to decode the information, regular activities of governments, companies and hospitals slam to a halt. Sometimes security ...

Climate change and hurricanes: do we need a smoking gun?

Many climate scientists are convinced that mega-storms Harvey and Irma—which left scores dead and caused massive economic losses—were boosted by global warming, but hesitate to say so in as many words.

A drone for last-centimeter delivery

A new drone developed at EPFL uses cutting-edge technology to deliver parcels weighing up to 500 grams. The device will never get stuck in traffic, it's programmed to avoid obstacles, and it can reach destinations on steep ...

30 years of healing the ozone layer

This week marks the 30th anniversary of the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer. The signing of the Montreal Protocol was a landmark political event. The treaty is the first in the ...

Hurricanes drive immigration to the U.S.—helped by green cards

When hurricanes hit other countries, the United States often sees a bump in migration into the country—and the biggest hike in migration rates happen from countries that already have a strong population established in the ...

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