Sheaf

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sheaf

the arrows contained in a quiver

Sheaf

 

(of fire), a military term.

(1) Battery sheaf, the mutually coordinated direction of the barrels of several guns (mortars, combat vehicle weapons), placed in one firing position for shooting at a single target. In preparing a battery for fire, a parallel sheaf is formed, in which the axes of the bores of all guns are placed parallel to the axis of the bore of the main gun (mortar, combat vehicle weapon). Depending on the direction of the bore axes (guides) in relation to one another, the sheaf can be parallel, converging, or diverging.

(2) Sheaf of battery explosions, simultaneous explosion of charges (mines) of several guns (mortars, combat vehicle weapons), placed in one firing position. Firing for adjustment is carried out with parallel battery sheafs. Firing to hit, depending on the width of the target, can be done by a concentrated battery sheaf (all guns aimed at one point) or by a battery sheaf along the width of the target.

I. T. SOLOV’EV


Sheaf

 

a bundle of stalks of cultivated plants measuring 20–30 cm in diameter. Harvesting machines use binding mechanisms that tie flax, hemp, kenaf, and other crops into sheaves and place them in shocks to dry. In prerevolutionary Russia and during the first five-year plans in the USSR, sheaves were tied by hand when grain was harvested. In countries where agriculture is not highly mechanized, this method is used in the harvest of wheat, rice, beans, kenaf, flax, and other crops.

sheaf

[shēf]
(mathematics)
A fiber bundle with algebraic and topological structure usually associated to a differentiable manifold M which reflects the local behavior of differentiable functions on M.
(ordnance)
Planned planes of fire which produce a desired pattern of bursts with rounds fired by two or more weapons.
References in periodicals archive ?
Possible savings and increased safety are part of the reason why Kirkland Lake Gold recently tapped NMT to supply sinking sheaves, service sheaves and production sheaves for the mine's planned Macassa Shaft No.
Caption: Whereas the Clancy catalogue offered "flat sheaves," the Sosman & Landis catalogue of 1889 offered "sheaves for flats." Image courtesy of the Chicago History Museum.
Takegoshi, Higher direct images of canonical sheaves tensorized with semi-positive vector bundles by proper Kahler morphisms, Math.
In those studies predicts the behavior when the actual vehicle is accelerated by taking into account the dynamics sheave during shifting.
The belts would wander on the sheaves unless constrained by side flanges.
offset between the drive and driven sheaves. This amount of parallel offset renders a 5[degrees] angular belt misalignment between the two sheaves when the center distance is fixed at 10.46 in.
The grain was left in the field in the shocks to "sweat" for about a week, and then the sheaves were pitched onto the old Chevy flatbed truck and hauled into our barn.
On [??] we introduce the filtered formal microstructure sheaves [O.bar.sup.[mu].sub.X]; defined as: [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII], having the stalks at p [member of] X;
The deal gives Baldor a second plant in China and the leading market share of sheaves and bushings in North America.
Then, for any i [greater than or equal to] 0, there is a natural isomorphism of sheaves over Y
The segments of the five-meter diameter pulley wheels, or sheaves, were cast by Quadrant Engineering Plastics (Quadrant EPP) in its own Nylatron GSM, a highperformance filled caprolaetam that reacts to form nylon 6 during the moulding process.
This configuration requires sheaves, belts and jackshafts to lower the speed to 600 to 700 RPM, which is ideal for a 60-inch or 80-inch mill.