Signal One (also known as Bullet Down Under) is a 1994 Australian crime film directed by Rob Stewart and starring Christopher Atkins, Mark Jackson, Richard...

Signal/One was a manufacturer of high performance SSB and CW HF radio communications transceivers initially based in St. Petersburg, Florida, United States...

Signals are standardized messages sent to a running program to trigger specific behavior, such as quitting or error handling. They are a limited form...

multiple subject fields including signal processing, information theory and biology. In signal processing, a signal is a function that conveys information...

jurisdictions signal services need to be registered with the authorities. Services provided fall into four categories: Unpaid/free signals Paid signals from one provider...

A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day. Church bells or voices announcing...

is a signal processing function, an implementation of frequency mixing, in which two signals are combined to yield an output signal. One signal, called...

A railway signal is a visual display device that conveys instructions or provides warning of instructions regarding the driver's authority to proceed....

Signal is an American open-source, encrypted messaging service for instant messaging, voice calls, and video calls. The instant messaging function includes...

Formed in 2002, One Unique Signal are a British, London based, five piece playing loud repetitive experimental music. The band also perform live and record...

signaling (cell signalling in British English) is the process by which a cell interacts with itself, other cells, and the environment. Cell signaling...

Signalling block systems enable the safe and efficient operation of railways by preventing collisions between trains. The basic principle is that a track...

A digital signal is a signal that represents data as a sequence of discrete values; at any given time it can only take on, at most, one of a finite number...

Within evolutionary biology, signalling theory is a body of theoretical work examining communication between individuals, both within species and across...

of digital signal processing (DSP), a digital signal is a discrete time, quantized amplitude signal. In other words, it is a sampled signal consisting...

Railway signals in Germany are regulated by the Eisenbahn-Signalordnung (ESO, railway signalling rules). There are several signalling systems in use,...

are represented by amplitude, phase and frequency of an analog signal. Analog signals vary over a continuous range of possible values which means that...

The Signal for Help (or the Violence at Home Signal for Help) is a single-handed gesture that can be used over a video call or in person by an individual...

can be optically emulated with a three-path interferometer. In a QAM signal, one carrier lags the other by 90°, and its amplitude modulation is customarily...

can proceed past a block signal after stopping for one minute at the signal, even if the signal is "stop". Each block signal is identified by an identification...

a signal from a sequence of time samples of the signal. Intuitively speaking, the spectral density characterizes the frequency content of the signal. One...

Signal transition, when referring to the modulation of a carrier signal, is a change from one significant condition to another. Examples of signal transitions...

The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University's Big Ear radio telescope in the United States...

busy signal Listen to a busy signal from North America, Hong Kong, South Korea and the Philippines. Example of an old North American busy signal Listen...

umpires signal one another at the start of an at-bat to remind one another that the game situation puts the rule into effect. A typical signal is to touch...

investment in signals to enhance one’s perceived attractiveness, formidability, or cooperative value to members of their own species. A signal differs from...

digital signal processor chips in the 1980s. A signal is a function x ( t ) {\displaystyle x(t)} , where this function is either deterministic (then one speaks...

of the signal. One hundred samples per symbol would be about the lowest number that is workable. Now that the amplitude change of the signal is known...

A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting...

receiving device for the reception of the code elements. A start signal is limited to one signal element usually having the duration of a unit interval.  This...