asynchronous


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asynchronous

[ā′siŋ·krə·nəs]
(computer science)
Operating at a speed determined by the circuit functions rather than by timing signals.
(physics)
Not synchronous.

asynchronous

(architecture)
Not synchronised by a shared signal such as clock or semaphore, proceeding independently.

Opposite: synchronous.

1. <operating system> A process in a multitasking system whose execution can proceed independently, "in the background". Other processes may be started before the asynchronous process has finished.

2. <communications> A communications system in which data transmission may start at any time and is indicated by a start bit, e.g. EIA-232. A data byte (or other element defined by the protocol) ends with a stop bit. A continuous marking condition (identical to stop bits but not quantized in time), is then maintained until data resumes.

asynchronous

Events that are not synchronized or coordinated in time. All the following are asynchronous operations. The interval between transmitting A and B is not the same as between B and C. The ability to initiate a transmission at either end. Storing and forwarding messages. Starting the next operation before the current one is completed. Contrast with synchronous.
References in periodicals archive ?
In a study Arbaugh (2004) found that many individuals who participated in asynchronous online courses, the experience involved in developmental process for understanding and becoming an active learner was totally new for them.
As a consequence of this search for new modes of communication, the instructors felt that the virtual classroom, including the asynchronous discussion forum, became more intimate.
This could cause complications if an instructor decides to leave the university Developing an entire course for asynchronous delivery is a significant time investment.
Paradigms for online learning: A case study in the design and implementation of an Asynchronous learning networks (ALN) course.
The CY7C1071DV33 32-Mbit is currently in production and the CY7C1081DV33 64-Mbit fast asynchronous SRAM is sampling now with production expected in October 2010.
Since then, I have developed the use of asynchronous communication tools to limit the repetitive, individual communications that overwhelmed me during my early semesters teaching online.
Like its synchronous counterpart, real-time asynchronous replication is used to protect organizations from the loss or unavailability of a primary storage device.
GRENOBLE, France -- Tiempo is demonstrating at the "Cartes 2009" event how its asynchronous design technology can dramatically improve processing speed for contactless applications with, as an illustration, a live demo of a secured PayPass[TM] transaction in which processing speed on the card is six times faster than industry implementations, showing a complete transaction in less than 60 ms.
This volume collects 18 papers due to be presented at the 13th IEEE (Institute of Electrical & Electronics Engineers) International Symposium on Asynchronous Circuits and Systems, which is scheduled to be held in Berkeley, California in March of 2007.
To take advantage of queuing, applications should be written to use asynchronous I/O.
Blackboard and WebCT, for example, allow students to download course materials, exchange documents, submit and receive assignments, and communicate with each other and the instructor in synchronous and asynchronous mode.