Stay-at-home orders cut noise exposure nearly in half

People's exposure to environmental noise dropped nearly in half during the early months of the coronavirus pandemic, according to University of Michigan researchers who analyzed data from the Apple Hearing Study.

Scientists find how clock gene wakes up green algae

A team of researchers from Nagoya University, Japan, has found the mechanism of the night-to-day transition of the circadian rhythm in green algae. The findings, published in the journal PLOS Genetics, could be applied to ...

Understanding the circadian clocks of individual cells

Two new studies led by UT Southwestern scientists outline how individual cells maintain their internal clocks, driven both through heritable and random means. These findings, published online May 1 in PNAS and May 27 in eLife, ...

Scientists boost microwave signal stability a hundredfold

Researchers at the National Institute of Standards and Technology (NIST) have used state-of-the-art atomic clocks, advanced light detectors, and a measurement tool called a frequency comb to boost the stability of microwave ...

page 1 from 56

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.

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