Signal (electrical engineering)

A signal as referred to in communication systems, signal processing, and electrical engineering is a function that "conveys information about the behavior or attributes of some phenomenon". In the physical world, any quantity exhibiting variation in time or variation in space (such as an image) is potentially a signal that might provide information on the status of a physical system, or convey a message between observers, among other possibilities. The IEEE Transactions on Signal Processing states that the term "signal" includesaudio, video, speech, image, communication, geophysical, sonar, radar, medical and musical signals.

Other examples of signals are the output of a thermocouple, which conveys temperature information, and the output of a pH meter which conveys acidity information. Typically, signals are often provided by a sensor, and often the original form of a signal is converted to another form of energy using a transducer. For example, a microphone converts an acoustic signal to a voltage waveform, and a speaker does the reverse.

Signal (novel)

Signal is a 2009 children's science fiction novel by Cynthia DeFelice. The book was a Junior Library Guild selection for 2009. The novel is about a boy who is bored with his new life in upstate New York and discovers a girl who claims to be from another planet, who has been kidnapped by an abusive couple, and attempts to make a signal to contact her home planet.

Synopsis

Signal (TV series)

Signal (Hangul: 시그널; RR: Sigeuneol) is a 2016 South Korean television series starring Lee Je-hoon, Kim Hye-soo and Cho Jin-woong. It airs on tvN on Fridays to Saturdays at 08:30 KST for 16 episodes beginning January 22, 2016.

Synopsis

A mysterious walkie talkie allows a rookie detective in the 1980s to communicate with a jaded cold case profiler in 2016; with the power of fore and hindsight the two not only solve crimes but prevent them from ever taking place. However a long standing murder case is closer to home than either realises.

Cast

Main characters

Supporting characters

Ratings

See also

Signal (song)

"SIGNAL" is a song written by Ma-saya, Joker, Joey Carbone, Lisa Huang and Akira for the second single and second studio album of the Japanese boy band, KAT-TUN. It was released on July 19, 2006 in Japan, and became the group's second consecutive number one single on the Oricon daily and weekly singles charts.

Release and promotion

The single was released in two pressings - a regular version with instrumental versions of all the songs and a limited edition containing the songs, the music video of the title track and a short film of the making of the music video. The single was used in a commercial for NTT DoCoMo's FOMA "9 Series" cell phone which all KAT-TUN members starred in.

KAT-TUN performed the song on television for the first time on Utawara, a variety talk show where they were already regulars alongside senpai Jun Matsumoto of Arashi, on July 16, 2006. They sung on Fuji TV's Hey! Hey! Hey! Music Champ the day after and made their second appearance on Masahiro Nakai's Utaban on July 20. KAT-TUN performed on Music Station on July 21 and two days later, returned to Utawara where they performed two weeks in a row - the latter performance being a medley of "Six Senses", "Real Face" and the single itself.

Electronics

Electronics is the science of how to control electric energy, energy in which the electrons have a fundamental role. Electronics deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive electrical components and interconnection technologies. Commonly, electronic devices contain circuitry consisting primarily or exclusively of active semiconductors supplemented with passive elements; such a circuit is described as an electronic circuit.

The nonlinear behaviour of active components and their ability to control electron flows makes amplification of weak signals possible, and electronics is widely used in information processing, telecommunication, and signal processing. The ability of electronic devices to act as switches makes digital information processing possible. Interconnection technologies such as circuit boards, electronics packaging technology, and other varied forms of communication infrastructure complete circuit functionality and transform the mixed components into a regular working system.

Electronic musical instrument

An electronic musical instrument is a musical instrument that produces sound using electronics. Such an instrument sounds by outputting an electrical audio signal that ultimately drives a loudspeaker.

An electronic instrument might include a user interface for controlling its sound, often by adjusting the pitch, frequency, or duration of each note. However, it is increasingly common to separate user interface and sound-generating functions into a music controller (input device) and a music synthesizer, respectively, with the two devices communicating through a musical performance description language such as MIDI or Open Sound Control.

All electronic musical instruments can be viewed as a subset of audio signal processing applications. Simple electronic musical instruments are sometimes called sound effects; the border between sound effects and actual musical instruments is often hazy.

Electronic musical instruments are now widely used in most styles of music. Development of new electronic musical instruments, controllers, and synthesizers continues to be a highly active and interdisciplinary field of research. Specialized conferences, notably the International Conference on New Interfaces for Musical Expression, have organized to report cutting-edge work, as well as to provide a showcase for artists who perform or create music with new electronic music instruments, controllers, and synthesizers.

Electronics (magazine)

Electronics was an American trade journal that covered the radio industry and its later spin-offs in the mid-to-late 20th century. Its first issue was dated in April 1930. The periodical was published under the title Electronics until 1984, when it changed temporarily to the new title ElectronicsWeek, but then reverted again to the original title Electronics in 1985. The ISSN for the corresponding periods are: 0013-5070 for the 1930–1984 issues, 0748-3252 for the 1984–1985 issues with title ElectronicsWeek, and 0883-4989 for the 1985–1995 issues. It was published by McGraw-Hill until 1988, when it was sold to the Dutch company VNU. VNU sold its American electronics magazines to Penton Publishing the next year.

Generally a monthly magazine, its frequency and page count varied with the state of the industry, until its end in 1995. More than its principal rival Electronic News, it balanced its appeal to managerial and technical interests (at the time of its 1992 makeover, it described itself as a magazine for managers). The magazine was best known for publishing the April 19, 1965 article by Intel co-founder Gordon Moore, in which he outlined what came to be known as Moore's Law.