Tremor Sweet Spots

The sweet spots of a tennis racquet

Measurements are presented on the behaviour of a hand-held tennis racquet when it impacts with a tennis ball. It is shown that an impulse is transmitted through the racquet to the hand in about 1.5 ms, with the result that the hand and the forearm both have a strong in ̄uence on the behaviour of the racquet even while the ball is still in contact with the strings. Regardless of the impact point,...

Can physiology zap therapeutic sweet spots in hypertension?

Workflows for Sweet Spots Identification in Shale Plays Using Seismic Inversion and Well Logs

Worldwide interest in shale plays has rapidly increased in recently years, thanks to the combination of horizontal drilling and hydraulic fracturing. Shale formations act as both the source and the reservoir for the natural gas and usually exhibit anisotropic properties at larger scale. Geological and petropysical studies found that the right combination of thickness, TOC (total organic carbon)...

Planetary exploration. Scientists pick two sweet spots for Rovers on Mars.

COPENHAGEN—A Danish panel decided last week that Bjørn Lomborg's controversial 2001 best-selling book, The Skeptical Environmentalist, is " scientifically dishonest. " The government misconduct committee also may be asked to examine whether Lomborg's views have colored the work of the environmental institute that he heads. At the same time, the Danish Research Agency (DRA) plans to review the p...

Tremor in a Bassoonist: Tremor in Dystonia or Essential Tremor?

JMD Dear Editor, Tremor is a common clinical feature in dystonia. It can be seen in both affected and unaffected body parts in patients with dystonia. Clinically, it may not be easily distinguishable from essential tremor, currently defined as a bilateral, largely symmetric postural or kinetic tremor involving the hands and forearms that is visible and persistent, with an associated or isolated...