Small

Small may refer to:

Science and technology

Other uses

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Small (journal)

Small is a peer-reviewed interdisciplinary journal. Established in 2005 as a monthly journal, it switched to biweekly in 2009. It publishes research in science and technology on the micro- and nanoscales in the form of Communications, Reviews, Concepts, Highlights, Essays, and Full Papers. The journal was co-founded by Chad Mirkin and Peter Gölitz. The editorial office is in Weinheim, Germany.

Small is available online through the Wiley Online Library. All of the publications can be found here.

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Lumbar

In tetrapod anatomy, lumbar is an adjective that means of or pertaining to the abdominal segment of the torso, between the diaphragm and the sacrum.

The lumbar region is sometimes referred to as the lower spine, or as an area of the back in its proximity.

In human anatomy the five vertebrae in the lumbar region of the back are the largest and strongest in the movable part of the spinal column, and can be distinguished by the absence of a foramen in the transverse process, and by the absence of facets on the sides of the body. In most mammals, the lumbar region of the spine curves outward.

The actual spinal cord (medulla spinalis) terminates between vertebrae one and two of this series, called L1 and L2. The nervous tissue that extends below this point are individual strands that collectively form the cauda equina. In between each lumbar vertebra a nerve root exits, and these nerve roots come together again to form the largest single nerve in the human body, the sciatic nerve. The sciatic nerve runs through the back of each leg and into the feet. This is why a disorder of the low back that affects a nerve root, such as a spinal disc herniation, can cause pain that radiates along the sciatic nerve (sciatica) down into the foot.

The Upsetters

The Upsetters was the name given to the house band for Jamaican reggae producer Lee "Scratch" Perry. The name of the band comes from Perry's nickname of Upsetter, after his song "I Am The Upsetter", a musical dismissal of his former boss Coxsone Dodd.

History

The Upsetters were originally Gladdy's All-Stars, led by pianist Gladstone Anderson and it was they who originally recorded the international hits "Live Injection" and "Return of Django". The double A-side release of "Return of Django" / "Dollar in the Teeth", peaked at #5 in the UK Singles Chart in November 1969. When other commitments prevented the All Stars from participating, another band named The Hippy Boys were recruited to do the subsequent tour in the UK. This line-up remained the studio band that is most associated with the name, going on to eventually form the nucleus of Bob Marley's backing band The Wailers.

The band included guitarist Alva Lewis, organist Glen Adams and brothers Aston "Family Man" Barrett and Carlton Barrett, on bass guitar and drums respectively.

Clutch

A clutch is a mechanical device that engages and disengages the power transmission, especially from driving shaft to driven shaft.

Clutches are used whenever the transmission of power or motion must be controlled either in amount or over time (e.g., electric screwdrivers limit how much torque is transmitted through use of a clutch; clutches control whether automobiles transmit engine power to the wheels).

In the simplest application, clutches connect and disconnect two rotating shafts (drive shafts or line shafts). In these devices, one shaft is typically attached to an engine or other power unit (the driving member) while the other shaft (the driven member) provides output power for work. While typically the motions involved are rotary, linear clutches are also possible.

In a torque-controlled drill, for instance, one shaft is driven by a motor and the other drives a drill chuck. The clutch connects the two shafts so they may be locked together and spin at the same speed (engaged), locked together but spinning at different speeds (slipping), or unlocked and spinning at different speeds (disengaged).

Clutch (sports)

Clutch performance in sports is the phenomenon of athletes under pressure, often in the last minutes of a game, to summon strength, concentration and whatever else necessary to succeed, to perform well, and perhaps change the outcome of the game. It occurs in basketball, hockey, football, and other sports. The opposite is "choking": failing to perform as needed, when under pressure.

It is a phenomenon that is studied in psychology and in the more specialized area of sport psychology. The greatest part of the academic literature is focused on baseball, specifically on clutch hitting, and addresses the academic issue of whether it exists or not.

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Clutch (pin fastener)

A butterfly clutch is a device that attaches to the back of a tack pin to secure an accessory to clothing.

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