Pervasive computing is the trend towards increasingly ubiquitous (another name for the movement is ubiquitous computing), connected computing devices in the environment, a trend being brought about by a convergence of advanced electronic - and particularly, wireless - technologies and the Internet. Pervasive computing devices are not personal computers as we tend to think of them, but very tiny - even invisible - devices, either mobile or embedded in almost any type of object imaginable, including cars, tools, appliances, clothing and various consumer goods - all communicating through increasingly interconnected networks.
http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci759337,00.html
Pervasive computing is the placement of microprocessors in every day objects. This characterizes mobile, invisible devices which are numerous and convenient in placement and function.
http://teambluehci.blogspot.com/2007/04/what-is-pervasive-computing.html
The idea that technology is moving beyond the personal computer to everyday devices with embedded technology and connectivity as computing devices become progressively smaller and more powerful. Also called ubiquitous computing, pervasive computing is the result of computer technology advancing at exponential speeds -- a trend toward all man-made and some natural products having hardware and software. Pervasive computing goes beyond the realm of personal computers: it is the idea that almost any device, from clothing to tools to appliances to cars to homes to the human body to your coffee mug, can be embedded with chips to connect the device to an infinite network of other devices. The goal of pervasive computing, which combines current network technologies with wireless computing, voice recognition, Internet capability and artificial intelligence, is to create an environment where the connectivity of devices is embedded in such a way that the connectivit
y is unobtrusive and always available.
http://www.webopedia.com/TERM/p/pervasive_computing.html
Pervasive Computing - similarities and differences in the definitions
Each of the pervasive computing definitions state, that it is computing going past the PC and using technologies in the environment around us. The two larger definitions also state that ubiquitous computing means the same thing. At that some of this new technology is “invisible” and with the third one say it is computing in the everyday objects around us.
I believe there are not many differences within these definitions as I think they’re all saying similar things.
Ubiquitous Computing
We define ubiquitous computing environments as learning environments in which all students have access to a variety of digital devices and services, including computers connected to the Internet and mobilecomputing devices, whenever and wherever they need them. Our notion of ubiquitous computing, then, is more focused on many-to-many than one-to-one or one-to-many, and includes the idea of technology being always available but not itself the focus of learning.Moreover, our definition of ubiquitous computing includes the idea that both teachers and students are active participants in the learning process, who critically analyze information,
create new knowledge in a variety of ways (both collaboratively and individually), communicate what they have learned , and choose which tools are appropriate for a particular task.
http://www.rcet.org/ubicomp/what.htm
Ubiquitous computing (or "ubicomp") is a post-desktop model of human-computer interaction in which information processing has been thoroughly integrated into everyday objects and activities. As opposed to the desktop paradigm, in which a single user consciously engages a single device for a specialized purpose, someone "using" ubiquitous computing engages many
computational devices and systems simultaneously, in the course of ordinary activities, and may not necessarily even be aware that they are doing so.
http://en.wikipedia.org/wiki/Ubiquitous_computing
So, what is ubiquitous computing? Ubiquitous means "ever present" or "everywhere." RCET's definition of ubiquitous learning environments is "learning environments in which all students have access to variety of digital devices and services, including devices connected to the Internet
and mobile computing devices whenever and wherever they need them." And, in case you were
wondering, the term ubiquitous computing was coined in 1988. I learned from the DVD that some say the first wave of computing was many people per computer. The second wave was one person per computer. The third wave is many computers per person. Ubiquitous computing
addresses this third wave
http://learninginhand.com/blog/2006/06/ubiquitous-computing-dvd.html
Ubiquitous Computing - Similarities and differences in Definitions
The major similarity in these definitions in the fact ubiquitous computing is changing the style of computing from one-to-one or one-to-many relations ships meaning one computer to one user
or one computer to many users to a many-to-many relationship, meaning people cam be using
computers at any time sometimes without even realising it.
I believe there are not many differences within these definitions as I think they’re all saying similar things. Apart from the 1st definition being more personalised and relating to the student/teacher relations ship.
Ambient Computing
Definition:
The ability of small mobile devices to enhance our quality of life without the necessity for user interaction
http://www.nljug.org/pages/events/content/jfall_2007/sessions/00034/slides/
Disappearing Computing
Disappearing computing, by definition, is designed to exploit rich combinations of invisible(or embedded within everyday objects) sensing/computational entities in order to identify and deliver personalised services to the users when they are interacting and exchanging information with the environment
http://www.ercim.org/EU-NSF/DC.pdf
Similarities and differences in all the definitions
Ambient and disappearing computing seem to be based more on improving quality of life by using the technology, where as pervasive and ubiquitous computing definitions seem to be making more of a point of how the technology is moving beyond the desktop and into the environment. However they all are saying very similar things about embedding computing into
the environment.
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