Businesses that use more than one computer, which today is a majority of companies, benefit from operating a network in order to share files, applications, information, Internet connections and communications. Networking computers together also allows for data protection, collaboration between individuals and better organization, among other uses. Computer networks allow people to share data at unprecedented levels, which has streamlined operations, cut down on costs and increased efficiency at all levels of operation, whether its a small business or a worldwide conglomerate. This sharing of information has forever changed the way business is conducted around the world.
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A cable harness, also known as a wire harness, cable assembly, wiring assembly or wiring loom, is an assembly of electrical cables or wires which transmit signals or electrical power. The cables are bound together by straps, cable ties, cable lacing, sleeves, electrical tape, conduit, a weave of extruded string, or a combination thereof.
Commonly used in automobiles, as well as construction machinery, cable harnesses provide several advantages over loose wires and cables. For example, many aircraft, automobiles and spacecraft contain many masses of wires which would stretch over several kilometres if fully extended. By binding the many wires and cables into a cable harness, the wires and cables can be better secured against the adverse effects of vibrations, abrasions, and moisture. By constricting the wires into a non-flexing bundle, usage of space is optimized, and the risk of a short is decreased. Since the installer has only one harness to install (as opposed to multiple wires), installation time is decreased and the process can be easily standardized. Binding the wires into a flame-retardant sleeve also lowers the risk of electrical fires.
In computing, a server is a Computer program or a device that provides functionality for other programs or devices, called "clients". This architecture is called the client-server model, and a single overall computation is distributed across multiple processes or devices. Servers can provide various functionalities, often called "services", such as sharing data or resources among multiple clients, or performing computation for a client. A single server can serve multiple clients, and a single client can use multiple servers. A client process may run on the same device or may connect over a network to a server on a different device. Typical servers are database server, file servers, mail servers, print servers, web servers, game servers, and applications servers.
Rack is short for amplifier rack, and is a term used mostly in reference to professional audio applications to describe any furniture, fixture, or case where amplifiers are mounted by their faceplates or in slot grooves, which is termed a "rack mount". A 19-inch rack is the most common standardized frame or enclosure for mounting multiple electronic equipment. Each piece of equipment has a front panel that is 19 inches (48.3 cm) wide. The 19-inch dimension includes the edges, or "ears", that protrude on each side, which allow the amplifier or other electronic equipment to be fastened to the rack frame with screws.
Wireless communication, or sometimes simply wireless, is the transfer of information or power between two or more points that are not connected by an electrical conductor. The most common wireless technologies use radio waves. With radio waves distances can be short, such as a few meters for Bluetooth or as far as millions of kilometers for deep-space radio communications. It encompasses various types of fixed, mobile, and portable applications, including two-way radios, cellular telephones, personal digital assistants (PDAs), and wireless networking. Other examples of applications of radio wireless technology include GPS units, garage door openers, wireless computer mice, keyboards and headsets, headphones, radio receivers, satellite television, broadcast television and cordless telephones.
Wireless security cameras are closed-circuit television (CCTV) cameras that transmit a video and audio signal to a wireless receiver through a radio band. Many wireless security cameras require at least one cable or wire for power; "wireless" refers to the transmission of video/audio. However, some wireless security cameras are battery-powered, making the cameras truly wireless from top to bottom.
The Visual Monitoring Camera (VMC), also known as the Video Monitoring Camera and Mars Webcam, is a small camera mounted on Mars Express spacecraft. It is operated by the Mars Express Flight Control Team at ESOC in Darmstadt, Germany.
Starting in 2007, the VMC was used for the Mars Webcam project (sometimes called this after this time) where it takes global views of Mars at a high cadence and they are posted online. The VMC is a camera-on-chip design, using the IRIS-1 system. Originally used as engineering monitoring camera for the Beagle 2 lander, it has a wide 40° field of view and limited imaging controls and it has no focus mechanism. In 2016, it was used for professional science in addition to its roles as a technical monitoring camera and public outreach, etc.
In electrical engineering, ground or earth is the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the earth.
Electrical circuits may be connected to ground (earth) for several reasons. In mains powered equipment, exposed metal parts are connected to ground so that if, due to any fault conditions, a "line" supply voltage connection occurs to any such conductive parts, the current flow will then be such that any protective equipment installed for either overload or "leakage" protection will operate and disconnect the line voltage. This is done to prevent harm resulting to the user from coming in contact with any such dangerous voltage in a situation where the user may, at the same time, also come in contact with an object at ground/earth potential. In electric power distribution systems, a protective earth (PE) conductor is an essential part of the safety provided by the earthing system.
A projection screen is an installation consisting of a surface and a support structure used for displaying a projected image for the view of an audience. Projection screens may be permanently installed, as in a movie theater painted on the wall or portable with tripod or floor rising models. as in a conference room or other non-dedicated viewing space. Another popular type of portable screens are inflatable screens for outdoor movie screening (open air cinema).
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