News tagged with amplitudes

Hair sensor uncovers hidden signals

An "artificial cricket hair" used as a sensitive flow sensor has difficulty detecting weak, low-frequency signals – they tend to be drowned out by noise. But now, a bit of clever tinkering with the flexibility of the tiny ...

dateJun 06, 2013 in Nanophysics
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How do cold ions slide

Things not always run smoothly. It may happen, actually, that when an object slides on another, the advancement may occur through a 'stop and go' series in the characteristic manner which scientists call "stick-slip", a pervasive ...

dateMay 23, 2013 in General Physics
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Clamorous city blackbirds

(—Animals have developed a variety of strategies for dealing with increasing noise pollution in their habitats. It is known, for example, that many urban birds sing at a high pitch to differentiate their song from ...

dateJan 11, 2013 in Plants & Animals
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Sound bullets in water

Sound waves are commonly used in applications ranging from ultrasound imaging to hyperthermia therapy, in which high temperatures are induced, for example, in tumors to destroy them. In 2010, researchers at Caltech led by ...

dateNov 19, 2012 in General Physics
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Jumping to reduce vibrations

A pioneering use of mini-trampolines is allowing engineers to better understand effects of vibrations caused by human movement on floors and small bridges. 

dateNov 16, 2012 in Engineering
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Do dolphins use nonlinear mathematics?

Research from the University of Southampton, which examines how dolphins might process their sonar signals, could provide a new system for man-made sonar to detect targets, such as sea mines, in bubbly water.

dateJul 18, 2012 in Plants & Animals
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Scientists first to observe plasmons on graphene

With a beam of infrared light, scientists have sent ripples of electrons along the surface of graphene and demonstrated that they can control the length and height of these oscillations, called plasmons, using a simple electrical ...

dateJun 20, 2012 in Nanomaterials
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