attention key on a keyboard). The C standard defines only 6 signals. They are all defined in signal.h header (csignal header in C++): SIGABRT – "abort", abnormal...

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...

serial line drop. SIGHUP is a symbolic constant defined in the header file signal.h. Access to computer systems for many years consisted of connecting a terminal...

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...

including the traditional H/V (Hauptsignal/Vorsignal) system. Originally, the railway company of each German state had its own signalling system. After these...

Signal processing is an electrical engineering subfield that focuses on analyzing, modifying and synthesizing signals, such as sound, images, potential...

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

In the C and C++ programming languages, unistd.h is the name of the header file that provides access to the POSIX operating system API. It is defined...

Digital signal processing (DSP) is the use of digital processing, such as by computers or more specialized digital signal processors, to perform a wide...

audio-visual communication sessions on any packet network. The H.323 standard addresses call signaling and control, multimedia transport and control, and bandwidth...

The use of lineside signals in Britain is restricted to railways with a maximum speed limit of up to 125 miles per hour (201 km/h). This is the maximum...

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

Signal transduction is the process by which a chemical or physical signal is transmitted through a cell as a series of molecular events. Proteins responsible...

modulation pattern for conditioning communication signals for transmission. It encodes a message signal as variations in the instantaneous phase of a carrier...

non-telephone signals. It also offers the possibility to be tunneled within H.225.0 call signaling messages. This eases firewall traversing. H.245 is capable...

digital signal processing, downsampling, compression, and decimation are terms associated with the process of resampling in a multi-rate digital signal processing...

It is possible to define an Ambisonic signal set with non-uniform resolution depending on source direction. This practice is called mixed-order, and it...

following is a list of signaling protocols: ALOHA Digital Subscriber System No. 1 (EDSS1) Dual-tone multi-frequency signaling H.248 H.323 H.225.0 Jingle Media...

sender's signal (H(Y)), diminished by the uncertainty that is left after receiving information about the sender's signal ( H ( Y ∣ X ) {\displaystyle H(Y\mid...

Signals intelligence (SIGINT) is the act and field of intelligence-gathering by interception of signals, whether communications between people (communications...

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

luminance signal), and chroma for chrominance television (i.e., the chrominance signal) "H.273 : Coding-independent code points for video signal type identification"...

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

a signal. Processes can in some cases install a custom signal handler, allowing them to recover on their own, but otherwise the OS default signal handler...

In contract theory, signalling (or signaling; see spelling differences) is the idea that one party (the agent) credibly conveys some information about...

to be heard from great distances. They are also used for acknowledging signals given by railroad employees, such as during switching operations. For steam...

The United States Army Signal Corps (USASC) is a branch of the United States Army that creates and manages communications and information systems for the...

ratified in 1995. Six more header files (complex.h, fenv.h, inttypes.h, stdbool.h, stdint.h, and tgmath.h) were added with C99, a revision to the C Standard...

communication channel, or a signal spectrum. Baseband bandwidth is equal to the upper cutoff frequency of a low-pass filter or baseband signal, which includes a...