atomic

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atomic

1. of, using, or characterized by atomic bombs or atomic energy
2. of, related to, or comprising atoms
3. Logic (of a sentence, formula, etc.) having no internal structure at the appropriate level of analysis. In predicate calculus, Fa is an atomic sentence and Fx an atomic predicate

atomic

(jargon)
(From Greek "atomos", indivisible) Indivisible; cannot be split up.

For example, an instruction may be said to do several things "atomically", i.e. all the things are done immediately, and there is no chance of the instruction being half-completed or of another being interspersed. Used especially to convey that an operation cannot be interrupted.

An atomic data type has no internal structure visible to the program. It can be represented by a flat domain (all elements are equally defined). Machine integers and Booleans are two examples.

An atomic database transaction is one which is guaranteed to complete successfully or not at all. If an error prevents a partially-performed transaction from proceeding to completion, it must be "backed out" to prevent the database being left in an inconsistent state.

atomic

Indivisible. An atomic operation, or atomicity, implies an operation that must be performed entirely or not at all. For example, if machine failure prevents a transaction to be processed to completion, the system will be rolled back to the start of the transaction. See two-phase commit and atom.
References in periodicals archive ?
He reviewed research on different types of catalytic reactions involving metal clusters whose sizes were atomically controlled.
Leading global provider of validated Atomically Clean Surfaces[sup.
Leading global provider of validated Atomically Clean SurfacesTM outsourced process tool parts cleaning, performance coating and refurbishment for sub-20nm manufacturing processes to exhibit at SEMICON Europa in Dresden, Germany
But atomically precise control of the gate -- which is crucial to transistor action at the smallest size scales -- is not possible with these approaches.
There is another device through which a specified hospital and ambulance service receive the information atomically in case of any accident, if the device is installed in the vehicle.
However, a virtually atomically identical moon and Earth threw the exact circumstances of the collision into question" Jacobson added.
The success and promise of atomically thin carbon, in which carbon atoms are arranged in a honeycomb lattice, also known as graphene has triggered enormous enthusiasm for other two dimensional materials, for example, hexagonal boron nitride and molybdenum sulphide.
The scientists at IBM Research used a scanning tunneling microscope (STM) to atomically engineer a grouping of twelve antiferromagnetically coupled atoms that stored a bit of data for hours at low temperatures.
But this experimental group built devices by placing atomically thin layers of phosphorus in silicon and found that with densely doped phosphorus wires just four atoms wide it acts like a wire that conducts just as well as metal," he said.
Other materials discussed include SrTiO3/TiO2, exhibiting a fivefold higher Seebeck effect compared with bulk material; the pulsed laser deposition of flat MgO(111) films on Al2O3(0001) substrates and of atomically flat MgO(111) films on YSZ(111) substrates with NiO(111) buffer layers.
The resulting atomically resolved components of the crystal valence band are shown in Fig.
Like the STM, they use an atomically sharp tip, but it is mounted on a cantilever resembling a miniature diving board, which flexes as the various electrostatic forces between the tip and atoms in the sample push or pull.