heartbeat


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heartbeat

[′härt‚bēt]
(physiology)
Pulsation of the heart coincident with ventricular systole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

heartbeat

(networking)
The signal emitted by a Level 2 Ethernet transceiver at the end of every packet to show that the collision-detection circuit is still connected.

heartbeat

(2)
A periodic synchronisation signal used by software or hardware, such as a bus clock or a periodic interrupt.

heartbeat

(3)
The "natural" oscillation frequency of a computer's clock crystal, before frequency division down to the machine's clock rate.

heartbeat

(4)
A signal emitted at regular intervals by software to demonstrate that it is still alive. Sometimes hardware is designed to reboot the machine if it stops hearing a heartbeat. See also breath-of-life packet, watchdog.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

heartbeat

(1) A periodic signal generated by hardware for activation and/or synchronization purposes. See MHz.

(2) A periodic signal generated by hardware or software to indicate that it is still running.
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References in periodicals archive ?
Current research on respiration and heartbeat monitoring mainly relies on the microwave impulse radar and continuous wave (CW) radar [7,8], which can be widely used in monitoring health status of the patients in clinic or the old at home.
2.55 Newmarket Sporting (50:25:10) 19-22 Pearl Ice, 11-14 Irish Heartbeat, 8-11 Mirza, 7-9 Es Que Love, 6-8 Piazza San Pietro, Swiss Franc, Shropshire, Lexi's Hero, 5-7 Swiss Cross, 4-6 El Viento, High Standing, Medicean Man, 3-5 Fratellino, 2-4 Albaqaa, Breathless Kiss, Joe Packet.
James, from Leamington, began suffering an irregular heartbeat as he approached his 40th birthday.
Pacemakers and implantable cardioverter-defibrillators (ICDs) both can correct arrhythmias (irregular heartbeats) by sending electrical pulses to the heart.
The actor said in a rare interview back in 2013 that he was already playing a policeman called Inspector Fox in the BBC's Inspector Alleyn Mysteries, when he began filming Heartbeat.
It would have barred abortions once health care providers are able to detect a fetal heartbeat. This law was just one of the many fetal heartbeat bills passed in seven Republican Red States that will effectively ban abortions before many women even knew they were pregnant.
These network layer suppression attacks are possible because, for many IoT devices, it's easy to distinguish heartbeat signals from other signals.
Together, Heartbeat and Iconery will leverage their shared expertise in brand-building, influencer marketing, and e-commerce to amplify both brands' presence moving forward.
Heartbeat is healthcare's first end-to-end proactive DICOM diagnostic and monitoring tool.
In this paper, we suggest a solution to improve Hadoop's system performance by optimizing its heartbeat periods.
At the Last Supper, it is said that John the beloved disciple reclined next to Jesus, so close he could hear the Lord's heartbeat. Like John, we know when we are especially close to the Lord.
This is a vulnerability of the Heartbeat feature of OpenSSL [2].