USB hub

A USB hub is a device that expands a single Universal Serial Bus (USB) port into several so that there are more ports available to connect devices to a host system.

USB hubs are often built into equipment such as computers, keyboards, monitors, or printers. When such a device has many USB ports, they all usually stem from one or two internal USB hubs rather than each port having independent USB circuitry.

Physically separate USB hubs come in a wide variety of form factors: from external boxes (looking similar to an Ethernet or network hub) connectible with a long cable, to small designs that can be directly plugged into a USB port (see the "compact design" picture). In the middle case, there are "short cable" hubs which typically use an integral 6-inch cable to slightly distance a small hub away from physical port congestion and of course increase the number of available ports.

Laptop computers may be equipped with many USB ports, but an external USB hub can consolidate several everyday devices (like a mouse and a printer) into a single hub to enable one-step attachment and removal of all the devices.

USB

USB, short for Universal Serial Bus, is an industry standard developed in the mid-1990s that defines the cables, connectors and communications protocols used in a bus for connection, communication, and power supply between computers and electronic devices. It is currently developed by the USB Implementers Forum.

USB was designed to standardize the connection of computer peripherals (including keyboards, pointing devices, digital cameras, printers, portable media players, disk drives and network adapters) to personal computers, both to communicate and to supply electric power. It has become commonplace on other devices, such as smartphones, PDAs and video game consoles. USB has effectively replaced a variety of earlier interfaces, such as serial and parallel ports, as well as separate power chargers for portable devices.

Overview

In general, there are three basic kinds or sizes related to the USB connectors and types of established connection: the older "standard" size, in its USB 1.1, 2.0, and 3.0 variants (for example, on USB flash drives), the "mini" size (primarily for the B connector end, such as on many cameras), and the "micro" size, in its USB 1.1, 2.0, and 3.0 variants (for example, on most modern mobile phones).

USB 3.0

USB 3.0 (renamed to USB 3.1 Gen 1 in 2015) is the third major version of the Universal Serial Bus (USB) standard for interfacing computers and electronic devices. Among other improvements, USB 3.0 adds the new transfer mode SuperSpeed (SS) that can transfer data at up to 5 Gbit/s (625 MB/s), which is about ten times faster than the USB 2.0 standard. USB 3.0 connectors are usually distinguished from their USB 2.0 counterparts by blue color-coding of the receptacles and plugs, and the initials SS.

A successor standard, USB 3.1 (renamed to USB 3.1 Gen 2 in 2015), was released in July 2013 with the new transfer mode SuperSpeed+ that can transfer data at up to 10 Gbit/s (1.25 GB/s, twice the rate of USB 3.0), bringing its theoretical maximum speed on par with the first version of the Thunderbolt interface.

Overview

The USB 3.0 specification is similar to USB 2.0 but with many improvements and an alternative implementation. Earlier USB concepts like endpoints and four transfer types (bulk, control, isochronous and interrupt) are preserved but the protocol and electrical interface are different. The specification defines a physically separate channel to carry USB 3.0 traffic. The changes in this specification make improvements in the following areas:

USB-6008

The National Instruments USB-6008 is a low-cost, multifunction data acquisition device (DAQ). It has 8 analog inputs, 2 analog outputs, and 12 digital input/outputs. The digital channels are divided into two ports. When one or more channels on each port is set to either input or output, the port is locked into that particular mode.

The USB-6008 uses the NI-DAQmx driver software and is compatible with LabVIEW, Measurement Studio for Visual Studio, .NET, LabWindows/CVI, and MATLAB (version R2006a and newer).

External links

Hub

Hub, or Hubs may refer to:

A hub is the central part of a wheel that connects the axle to the wheel itself. Many expressions use the term for a literal or figurative central structure connecting to a periphery.

Wheels

Buildings

Computing

Fiction

Okko

Okko is a comic book published in a series of mini-series, or cycles. Originally published in France by Delcourt, Archaia Studios Press started reprinting the series in English in 2006. This series is intended for Mature Readers; it contains adult content, graphic violence, and nudity.

Written and illustrated by Hub with colors done by Hub (Humbert Chabuel) and Stephan Pecayo. The English translation was provided by Edward Gauvin.

Premise

The action of the first cycle of Okko takes place at the far end of the known lands of the Empire of Pajan. Pajan itself is a vast and diversified island, surrounded by a multitude of archipelagoes. Its name is derived from that of its Imperial Family. Though the Pajans have reigned for a millennium, in the last few decades three major families—the Ataku, the Boshimon, and the Yommo—have called into question their legitimacy and now refuse to cease their battles against the Imperial Family. These power struggles have destabilized the Empire, and famine and catastrophes follow one another. This period of chaos is commonly called the Era of Asagiri (the Time of Mists).

Hub (comics)

Hub is a fictional mutant character in the Marvel Comics Universe. Her first appearance was in Excalibur vol. 3 #2.

Fictional character biography

Little is known about Hub before she made her appearance on the desolate island of Genosha. She was one of the few survivors after Cassandra Nova programmed her Wild Sentinels to decimate the island, killing over 16 million mutants.

Somehow she found other survivors and allied herself with Unus the Untouchable and his gang. She was a very valuable asset on the island since all forms of transport were eradicated or made useless by the resulting electro-magnetic damage. Inside of the gang, she became close friends with Hack and the two of them began to doubt if Unus' exclusive, clique-like strategy was the best way.

When a mentally ill Scarlet Witch removed the mutant gene from over 90% of the mutant population, Hub was one of the many who lost her powers. However, Quicksilver—as an act of penance for his part in the worldwide depowering—stole some Terrigen crystals from the Inhumans in an attempt to repower some mutants. He started his mass efforts in Genosha and effectively restored the abilities of many on the island including Wicked, Freakshow, Purge, and Callisto. But in a cruel twist of fate, their abilities were amplified beyond control and quickly faded. Hub's fate since that time is unknown.