Engineering

An underwater navigation system powered by sound

GPS isn't waterproof. The navigation system depends on radio waves, which break down rapidly in liquids, including seawater. To track undersea objects like drones or whales, researchers rely on acoustic signaling. But devices ...

Security

Red Cross chief: cyber attacks increasing on hospitals

The president of the International Committee of the Red Cross warned Wednesday that the frequency of sophisticated cyber attacks against hospitals, electricity and water supplies, and other critical civilian infrastructure ...

Engineering

Contextual engineering adds deeper perspective to local projects

When engineers develop drinking water systems, they often expect their technology and expertise to work in any context. But project success depends as much on the people and place as on technical design, says Ann-Perry Witmer, ...

Energy & Green Tech

Harnessing the sun to purify concentrated waste streams

Reverse osmosis is one of the most common methods for purifying saline water, but the process produces limited results. About 20% to 50% of the water that enters the system remains as a concentrated waste stream.

Security

Israeli cyber chief: Major attack on water systems thwarted

Israel's national cyber chief Thursday officially acknowledged the country had thwarted a major cyber attack last month against its water systems, an assault widely attributed to arch-enemy Iran, calling it a "synchronized ...

Energy & Green Tech

Simple, solar-powered water desalination

A completely passive solar-powered desalination system developed by researchers at MIT and in China could provide more than 1.5 gallons of fresh drinking water per hour for every square meter of solar collecting area. Such ...

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