relaying system
31High Voltage Isolation and Ground Potential Rise — This article outlines the principles of High Voltage Isolation (HVI) and Ground Potential Rise (GPR). Most often questions of concern arise to anyone associated with the use of any communication signal (analog or digital) via a metallic or fiber… …
32John Stone Stone — (24 septembre 1869 – 20 mai 1943) était un mathématicien, physicien et inventeur américain. Il a travaillé comme l un des premiers ingénieurs téléphoniques, a influencé le développement des communications sans fils et est le… …
33Email spam — An email box folder filled with spam messages. Email spam, also known as junk email or unsolicited bulk email (UBE), is a subset of spam that involves nearly identical messages sent to numerous recipients by email. Definitions of spam usually… …
34Dublin–Cork railway line — Dublin to Cork line Mark 4 InterCity at Cork Kent. Overview Type Commuter rail, InterCity, Regional rail …
35technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
364G — (also known as Beyond 3G), an abbreviation for Fourth Generation, is a term used to describe the next complete evolution in wireless communications . A 4G system will be able to provide a comprehensive IP solution where voice, data and streamed… …
37Multi-user MIMO — In radio, multi user MIMO (MU MIMO) is a set of advanced MIMO, multiple input and multiple output (pronounced mee moh or my moh), technologies that exploit the availability of multiple independent radio terminals in order to enhance the… …
38Relay — This article is about the electrical component. For other uses, see Relay (disambiguation). Automotive style miniature relay, dust cover is taken off A relay is an electrically operated switch. Many relays use an electromagnet to operate a… …
39NI Railways — See also: Rail transport in Ireland NI Railways …
40DomainKeys Identified Mail — (DKIM) is a method for associating a domain name to an email message, thereby allowing a person, role, or organization to claim some responsibility for the message. The association is set up by means of a digital signature which can be validated… …
