Ajax: A New Approach to Web Applications
If anything about current interaction design can be called "glamorous," it's creating Web applications. After all, when was the last time you heard someone rave about the interaction design of a product that wasn't on the Web? (Okay, besides the iPod.) All the cool, innovative new projects are online.
Despite this, Web interaction designers can't help but feel a little envious of our colleagues who create desktop software. Desktop applications have a richness and responsiveness that has seemed out of reach on the Web. The same simplicity that enabled the Web's rapid proliferation also creates a gap between the experiences we can provide and the experiences users can get from a desktop application.
That gap is closing. Take a look at Google Suggest. Watch the way the suggested terms update as you type, almost instantly. Now look at Google Maps. Zoom in. Use your cursor to grab the map and scroll around a bit. Again, everything happens almost instantly, with no waiting for pages to reload.
Google Suggest and Google Maps are two examples of a new approach to web applications that we at Adaptive Path have been calling Ajax. The name is shorthand for Asynchronous JavaScript + XML, and it represents a fundamental shift in what's possible on the Web.
Defining Ajax
Ajax isn't a technology. It's really several technologies, each flourishing in its own right, coming together in powerful new ways. Ajax incorporates:
standards-based presentation using XHTML and CSS;
dynamic display and interaction using the Document Object Model;
data interchange and manipulation using XML and XSLT;
asynchronous data retrieval using XMLHttpRequest;
and JavaScript binding everything together.
The classic web application model works like this: Most user actions in the interface trigger an HTTP request back to a web server. The server does some processing retrieving data, crunching numbers, talking to various legacy systems and then returns an HTML page to the client. It's a model adapted from the Web's original use as a hypertext medium, but as fans of The Elements of User Experience know, what makes the Web good for hypertext doesn't necessarily make it good for software applications.
Figure 1: The traditional model for web applications (left) compared to the Ajax model (right).
This approach makes a lot of technical sense, but it doesn't make for a great user experience. While the server is doing its thing, what's the user doing? That's right, waiting. And at every step in a task, the user waits some more.
Ajax electronics ' problem is that they have too much accounts receivable, inventory and liabilities, and I recommend them to stop selling defibrillators and focus on industrial sensors, which they will have lower competition and a gross margin up to 40%, and get some with financial and administrative skills on the board or as an manager.
A presentation given on the 9th of January 2014 as a part of the SF/JS Field Trip
Basically, a Browser/Server (B/S) model is adopted in the system design where nearly all computing load is located on the server side, while the client side is only responsible for displaying. In this project, SOA is used to facilitate data communication and interactive operations for the reason that each web service is an independent unit in SOA. The general structure of the web-based UMS using SOA is described as follows (Figure 2). In Figure 2, the server side is composed of GIS web service providers, an image cache server, a web server and a firewall.
Web designers have the job of working alongside clients or organisations to discuss ideas and develop job details and requirements for websites and more recently mobile application development, to provide their end uses a multi-channel window into their systems. They design and develop website content for clients as well as maintaining or coordinating maintenance for those websites once completed and implemented.
Providing Full-Text Access to Eric Digest. n.p. 2003. The 'Secondary' of the 'Secondary' of the Web. The Web. The Web.
Web IS. The importance of web led the classical information systems to transform in order to integrate with web technologies. This means that a web application can access an organization’s dataset. And as we mentioned above, this integration creates new data issues, like security and accessibility.
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UCI Disabilities Services Center. (2003, February 2). Universal design and web accessibility. Retrieved September 17, 2003, fromhttp://www.disability.uci.edu/other_links/web_accessibility.htm
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