Mach


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.
Related to Mach: Ernst Mach, Mach kernel

Mach

Ernst . 1838--1916, Austrian physicist and philosopher. He devised the system of speed measurement using the Mach number. He also founded logical positivism, asserting that the validity of a scientific law is proved only after empirical testing

Mach

Machclick for a larger image
Speed of sound as a function of altitude.
Machclick for a larger image
Refers to a Mach number, or the ratio of the speed of an airplane to the speed of sound in the same atmospheric conditions. It is also used as a speed unit. The speed of sound, or Mach 1, is equal to 340.5 m/s, 661 knots, 761 miles per hour, or 1225.5 km/h at sea level under standard conditions, and it decreases with altitude. Above the tropopause (about 36,090 ft, or 11 km), Mach 1 is 295.5 m/s, 574 knots, 658 miles per hour, or 1063.2 km/h. Named after Ernst Mach (1838–1916).

Mach

An operating system kernel under development at Carnegie-Mellon University to support distributed and parallel computation. Mach is designed to support computing environments consisting of networks of uniprocessors and multiprocessors. Mach is the kernel of the OSF/1.
References in periodicals archive ?
As part of its comprehensive roaming services portfolio, MACH already provides fraud and revenue assurance services to more than 400 customers globally.
MACH shareholders have fully endorsed our plans for accelerated growth and have made available the necessary financial investment to turn our vision into reality," said Jean Mandeville, Chief Financial Officer, MACH.
In the coming weeks, the 2014 BENJAMIN MACH ready-to-wear collection will be available online.
1 MACH Global Roaming Traffic Analysis, September 2011
McDonnell Douglas claims its Mach 25 plane "will need only minimal maintenance and refueling-only hours or perhaps even minutes-before it is ready for another flight.
Charles Damen, Vice President Mobile Billing and Payments, MACH, commented: "Direct operator billing is the future of payments for apps and digital goods.
On 27 March 2004, NASA's unmanned Hyper-X (X-43A) airplane reached Mach 6.
MACH helps operators such as Telefonica EspaSa to reduce their exposure to fraud through advanced modelling techniques that profile subscribers and compare their patterns of behaviour to that of fraudulent behaviour patterns.
We're excited to have Willie as the leader of our technology advisory board," stated Paul Greene, Mach 1's CEO.
Moore will be responsible for achieving MACH's aggressive growth targets in the region, and for ensuring that MACH continues to meet and exceed the evolving expectations of North American customers.
Released over the ocean, the Pegasus booster rocket will take the X-43A to an altitude of 95,000 feet and a speed of Mach 7, roughly 4,900 mph.
Pro Mach has purchased Benchmark Automation in an attempt to make stronger its offer to the bakery market, as it forecast significant growth for the sector.