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, intelligent hub and Surface Hub.

(2) In an Ethernet network, a hub is a central device to which all clients and servers are wired. Most Ethernet hubs are active 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. The Token Ring hub is officially a "Multi-station Access Unit" (MAU). See Token Ring and LAN.


References in periodicals archive ?
Jones will become president of the new Hub Mid-South operations, reporting to Chapman.
In our community at Swito hub, I've been able to reach out to other members who inspire me and helped me in showcasing my portfolio especially my work as an architect of the barrios,' Arch.
The announcement of a second wave of 18 new and two expanded Careers Hubs is backed by a further PS2.5 million investment.
He said installing such Iyaoloja and Babaloja would contradict what the hub was known for and breach the peace there because it was not a regular market.
The Hub which is presently accommodating the state securities, is managed by TogbahGowee and is gradually declining since his narrow ascendancy as manager after the death of the Hub's former manager, Hezekiah Siakor.
As a home media center, the HTC 5G Hub uses next-gen 5G speeds to stream 4K videos to a second screen and deliver crisp, clear content.
The Hub Power Company Limited currently produces 1601 MW through its three plants in Hub, Narowal and Azad Kashmir.
Hub dam covers the area over 24000 acres from where water is supplied to Karachi through pumping.
Standard Hub signs will be placed off of the highway to direct travelers, and portable restrooms and wooden picnic tables will be provided on new concrete pads near an existing walking trail.
'The report notes that Cyberjaya has had some success in creating jobs and attracting investment, but has ultimately failed in its objective of creating a world-leading IT entrepreneurial hub,' IDEAS said.
One concern, that the Hub "does not have an effective [advisory] board because one hasn't been appointed" is false.
The Growth Hub stand is located at B25, B26 and B27.