block

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block

2. a casing housing one or more freely rotating pulleys
3. Pathol
a. interference in the normal physiological functioning of an organ or part
b. See heart block
c. See nerve block
4. Psychol a short interruption of perceptual or thought processes
5. Computing a group of words treated as a unit of data on a tape, disk, etc
6. Athletics short for starting block
7. Cricket a mark made near the popping crease by a batsman to indicate his position in relation to the wicket

Block

A large piece of stone, taken from the quarry to the mill for sawing and further working.

Block

 

in engineering:

(1) A unit of a mechanism in the form of a wheel with a groove around its circumference over which a cable or chain is drawn. It is used to change the direction of a tractive force and to obtain a force or velocity advantage; more rarely, to transfer a torque. Depending on their function, blocks are known as guide, balance, runner, and driving (for imparting rotary motion to a shaft) pulleys. In order to achieve a large force or velocity advantage, a lifting mechanism made up of a combination of blocks (a block and tackle) is used.

(2) A subassembly of a machine, consisting of several identical parts, such as a block of cylinders in an internal combustion engine or the spindle block in a multiple-spindle machine.

(3) A stone (concrete or ceramic) of large size (appreciably larger than a brick) used in the construction of buildings and for road surfacing.

N. IA. NIBERG

block

[bläk]
(computer science)
A group of information units (such as records, words, characters, or digits) that are transported or considered as a single unit by virtue of their being stored in successive storage locations; for example, a group of logical records constituting a physical record.
The section of a computer memory or storage device that stores such a group of information units. Also known as storage block.
To combine two or more information units into a single unit.
A contiguous group of text characters that is marked for moving, copying, saving, deletion, or some other word-processing operation.
(design engineering)
A metal or wood case enclosing one or more pulleys; has a hook with which it can be attached to an object.
(mining engineering)
A division of a mine, usually bounded by workings but sometimes by survey lines or other arbitrary limits.
In quarrying, a large portion of rock that is removed from the quarry as a solid mass for further processing at a mill.
(petroleum engineering)
The subdivision of a sea area for the licensing of oil and gas exploration and production rights.
(statistics)
In experimental design, a homogeneous aggregation of items under observation, such as a group of contiguous plots of land or all animals in a litter.

block

block, 6
1. A masonry unit; a concrete block.
2. (Brit.) A walling unit which exceeds in length, width, or height the dimensions specified for a brick.
3. A solid piece of wood or other material.
4. A plank or timber which serves as bridging between joists or the like.
5. In quarrying, the large piece of stone, generally squared, that is taken from the quarry to the mill for sawing, slabbing, and further working.
6. A mechanical

block

1. <unit> A unit of data or memory, often, but not exclusively, on a magnetic disk or magnetic tape.

Compare record, sector.

block

(1) A group of disk or tape records that is stored and transferred as a single unit. On a CD, a block consists of 98 frames of 33 bytes for a total of 3,234 bytes, or 1/75th of a second. See block level.

(2) A group of bits or bytes that is transmitted or processed as a single unit.

(3) A group of text characters that has been marked for moving, copying, saving or other operation.

(4) A rectangular group of pixels that are processed as a unit.

(5) A group of program statements that are treated as a unit based on the results of a comparison.
References in periodicals archive ?
Right bundle-branch block in anterior acute myocardial infarction in the coronary intervention era: acute angiographic findings and prognosis.
From the observation that the presence of a bundle-branch block or an intraventricular delay of the electrical impulse transmission could worsen HF due to a deteriorated systolic function (1-3), studies were conducted using the simultaneous stimulation of both ventricles in the attempt to promote ventricular resynchronization (1-5).
Inclusion criteria: patients with HF, left bundle-branch block, who had a cardiac resynchronization device implanted.
Exclusion criteria: Presence of an atrial fibrillation (AF) and/or a right bundle-branch block, and/or a hypertrophic cardiomyopathy, and/or a congenital cardiopathy.
Long-term follow-up of individuals with the electrocar diographic pattern of right bundle-branch block and ST-segment elevation in precordial leads V1 to V3.
From 2001 to 2006, 93 patients with heart failure in NYHA functional class III or IV of any etiology, associated to a left bundle-branch block with QRS [greater than or equal to] 120 ms, clinically treated with optimal medical therapy at the Pacing and Arrhythmia Unit of InCor-HCFMUSP, were retrospectively investigated.
Cardiac pacing devices, among which the multi-site (atrial-biventricular) pacemakers, have already been used with the purpose of promoting better homogeneity of electrical activation of the myocardium, and therefore, of the segmentary contractility as well, in the hearts of patients suffering from left bundle-branch block or other intraventricular conduction disorders.
This proves that, in such case, there was no influence of the ventricular activation (QRS) over the QT interval values obtained, although left bundle-branch block was present in all the patients.