hub

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hub

1. the central portion of a wheel, propeller, fan, etc., through which the axle passes
2. Computing a device for connecting computers in a network

Hub

 

the central part of a rotating component, such as a flywheel, pulley, or gear, with an opening used to mount the part on a shaft or axle. The opening usually has a keyway or splines to transmit torque. In cases where the component is designed to rotate freely on the axle, the hub opening is fitted with a pressed-in bushing or rolling-contact bearing. To ensure strength, hubs are usually designed with an outside diameter 1.5–1.8 times the diameter of the opening. To prevent misalignment of the component on the shaft, the thickness of the hub should be at least equal to the diameter of the opening.

hub

[həb]
(building construction)
The core section of a building from which corridors extend.
(computer science)
An electric socket in a plugboard into which one may insert or connect leads or may plug wires.
(design engineering)
The cylindrical central part of a wheel, propeller, or fan.
A piece in a lock that is turned by the knob spindle, causing the bolt to move.
A short coupling that joins plumbing pipes.
(engineering)
In surveying, a stake that marks the position of a theodolite.
(metallurgy)
A steel punch used in making a working die for a coin or medal.

hub

1. The core of a building usually containing one or more stairs and elevators, from which corridors radiate.
2. The part of a lock through which the spindle passes to actuate the mechanism.
3. A stake marking a theodolite position in surveying.
4.See bell.
5. The thickened inner portion of a gear or wheel, i.e., the portion closest to the shaft.

hub

(networking)
(By analogy with the hub of a wheel) A device connected to several other devices.

In ARCnet, a hub is used to connect several computers together. In a message handling service, a number of local computers might exchange messages solely with a hub computer. The hub would be responsible for exchanging messages with other hubs and non-local computers.

hub

(1) See Web hub, digital media hub and intelligent hub.

(2) In an Ethernet network, a device to which all clients and servers are wired. Most Ethernet hubs are active hubs and regenerate the data bits on the output side in order to maintain a strong signal. Ethernet hubs have mostly given way to Ethernet switches. See Ethernet, hub vs. switch and LAN.

(3) In a Token Ring network, a device to which all clients and servers are wired. It is officially known as a "Multi-station Access Unit" (MAU). See Token Ring and LAN.


References in periodicals archive ?
These capabilities distinguish the software hub of a hub-and-spoke system from the sort of thing that techies sometimes refer to as a "network hub.
Although the list of technologies supported by commercially available hub-and-spoke products is already impressive, no software hub can provide instant connectivity to all computer platforms.
As leading-edge companies have found, moving to hub-and-spoke usually requires four steps:
A hub-and-spoke approach cannot make a science of this art.
First, hub-and-spoke technology, when used effectively, can support a wide range of strategies and decision-making styles - that is, it helps reconcile the apparent conflict between a company's desire to maintain its own unique way of doing things and the pressure to save money by buying standardized computer systems off the shelf.
In personal insurance, for example, a hub-and-spoke approach has been successfully adopted by firms with radically different decision-making styles.
Second, and far more important, hub-and-spoke encourages IT systems to evolve - with relatively little pain.
The hub-and-spoke method enables companies to treat legacy systems as assets rather than liabilities.
Hub-and-spoke allows them to express their needs for information in familiar, business-relevant terms: how information should be integrated, what sequence transactions should follow, and what new functionalities should be added.
The most visible payoff of hub-and-spoke comes from the speed with which new capabilities can be added to existing systems to create entirely new business processes.