atm

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atmosphere

 [at´mos-fēr]
1. the entire gaseous envelope surrounding the earth and subject to the earth's gravitational field.
2. the air or climate in a particular place. adj., atmospher´ic.
3. a unit of pressure, being that exerted by the earth's atmosphere at sea level; equal to 1.01325 × 105pascals (approximately 760 mm Hg). Abbreviated atm.

atm

atm

atmosphere (3).

atm

1 abbreviation for atmosphere.
2 abbreviation for atmospheric.

ATM

Ataxia telangiectasia mutated. A checkpoint kinase which transduces genomic stress signals to stop cell cycle progression and promote DNA repair, acting via p53, a tumour suppressor protein. Its cognate gene, ATM (see below), is mutated in ataxia telangiectasia, a rare neurodegenerative disease characterised by ataxia telangiectasias, increased chromosome fragility when exposed to ionising radiation and predisposition to lymphomas.

ATM (Gene)
A gene on chromosome 11q22-q23, which encodes a PI3/PI4 cell-cycle checkpoint kinase that phosphorylates, thereby regulating a broad range of downstream proteins—e.g., tumor suppressor proteins p53 and BRCA1, checkpoint kinase CHK2, checkpoint proteins RAD17 and RAD9, and DNA repair protein NBS1.

Mutated in
Ataxia-telangiectasia.

atm

Abbreviation for standard atmosphere.

ATM,

atm

atmosphere.
References in periodicals archive ?
The merger of frame and cell switching in high-performance networks has spawned another new building block, the frame-to-cell switch.
Frame and cell switching facilitate LAN segmentation and enhance network performance, but they can also aggravate old problems.
Van Cullens, senior vice president of Marketing and Business Development for Siemens Stromberg-Carlson, said, "The flexibility of the EWSM cell switching system architecture ensures the ability to provide services today, while at the same time evolving the network to meet data communication needs of the future.
Siemens Stromberg-Carlson's EWSM Cell Switching Systems will be located in two of Southwestern Bell's labs located approximately 20 miles apart.
The EWSM Cell Switching System operates over fiber and offers a migration path from today's narrow and wideband services to broadband ATM.
Focusing on high speed application interconnection, the company will demonstrate how it is possible to take advantage of immediate revenue opportunities, based on the EWSM Cell Switching System, while moving towards the broadband network of the future.
By delivering SMDS services (Switched Multimegabit Data Service) using a live EWSM Cell Switching System networked between the Siemens Stromberg-Carlson and the SuperSchool exhibit, the company will demonstrate distance learning.
May 18 /PRNewswire/ -- The first live Switched Multimegabit Data Service (SMDS) offering will be demonstrated by Bell Atlantic via the Siemens Stromberg-Carlson EWSM Cell Switching System during INTEROP '92 Spring.