Electronics & Semiconductors

New technique may enable all-optical data-center networks

A new technique that synchronizes the clocks of computers in under a billionth of a second can eliminate one of the hurdles for the deployment of all-optical networks, potentially leading to more efficient data centers, according ...

Consumer & Gadgets

Gadgets: Multi-functional clock radio has alarm and so much more

Bedside clock radios are critical for time displays and alarms to get you going in the morning. These days they are also needed for so much more, and the new AC powered iHome iBTW281 dual alarm clock speaker system does it ...

Engineering

Nature can help solve optimization problems

Today's best digital computers still struggle to solve, in a practical time frame, a certain class of problem: combinatorial optimization problems, or those that involve combing through large sets of possibilities to find ...

Consumer & Gadgets

IKEA and Sonos team up for SYMFONISK speakers and a lamp

For years, the Sonos Wi-Fi speakers have been beloved by music fans for the ease of listening to streaming music at home with great sound. Also, add the ability to add multiple speakers for even better sound without having ...

Hardware

Molecular clock could greatly improve smartphone navigation

MIT researchers have developed the first molecular clock on a chip, which uses the constant, measurable rotation of molecules—when exposed to a certain frequency of electromagnetic radiation—to keep time. The chip could ...

Consumer & Gadgets

Philips white bulbs enable controls for dimmed or energizing light

Sunny days are easily linked to feelings of well being; gloomy days with no sun in sight are accordingly linked to feelings of sadness. That's the easy part. People who work night shifts have a more complex problem of missing ...

Clock

A clock is an instrument used to indicate, keep, and co-ordinate time. The word clock is derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell". A silent instrument missing such a mechanism has traditionally been known as a timepiece. In general usage today a "clock" refers to any device for measuring and displaying the time. Watches and other timepieces that can be carried on one's person are often distinguished from clocks.

The clock is one of the oldest human inventions, meeting the need to consistently measure intervals of time shorter than the natural units: the day; the lunar month; and the year. Devices operating on several different physical processes have been used over the millennia, culminating in the clocks of today.

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