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A Web-based Application for Unit Conversion

This is an example for the data intensive application. All the units were collected and stored in a database (See Figure below). The application has two options: “Complete Collection” and “Frequently Used”. As the page is loaded, the “Frequently Used” option is used as Unit Categories are loaded into the category combobox at the top right corner. If user checks the “Complete selection” radio button, the category combobox will immediate load all the unit categories. After the category (e.g. Length) is selected and the “Get Units” button is clicked, the application displays either all the Length units (if the “Complete Collection” radio button is checked), or the frequently used units for Length (if the “Frequently Used” radio button is checked). The units are loaded simultaneously into two list boxes.

The user selects the left unit to be convert from, and the right unit to be convert to, and at the same time, the application displays the short sign in the text boxes below the list boxes (e.g., “m” for “meter” and “in” for “inch”). In the last step, the user click on the “Get Data” button to get the conversion value, for example, in the figure below it shows 1 meter = 39.37 inch.

 

 

 


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Bingji (Benjamin) Li 2009. All rights reserved.