sábado, 28 de maio de 2011
sexta-feira, 27 de maio de 2011
The old bugbear of unit conversions confounds many. Sometimes it can be corrected with an eraser; sometimes it could take a million dollars. It is a matter of trivia that NASA’s 1999 loss of the $125 million Mars Climate Orbiter was caused by one launch team using metric units while another used US customary units for a calculation.
It is serious stuff and for long was a matter of national pride as the U.S and U.K went head to head with their measurement systems. Thankfully, the SI system became the universal standard. For me, it was just my homework and the headache of getting my pounds and pints right. Kilograms and liters (or is it litres?) seemed so much easier. Online unit converters and calculators save the day today. It’s no longer a case of 1,000,000 headaches = 1 mega-headache as online unit converters do the math with a click.
Here are ten of them.
It is an offbeat name for an all-in-one unit converter. The free online tool covers all the common conversions you might use in your daily life; some purely mathematical and others (clothing size, cooking) for functional. Exchange rate calculators again are one useful tool that gives you the currency conversions with a fair degree of real time accuracy. (See Directory mention)
The free online converter handles temperature, volume, distance, weight, area, data, time, and speed unit conversions. The interface is very user-friendly with large icons and bulleted units which you can select for your instant conversion needs. (See Directory mention)
Engineering students and others too can make use of the variety of conversion options on this site. Molar mass unit conversions or frequency wavelength unit conversions will appeal to the scientifically minded. I am more interested in finding out how many gallons I can get to the liter with the fuel conversion tool. (See Directory mention)
Convertworld.com ratchets up with a few more options like wind speed conversion, absorbed dose tool, TV & monitor size converter, and a ‘language’ conversion tool, among a lot of other scientific options. You can view the converters by selecting from your choice of 28 languages. (See Directory mention)
This cool looking conversion tool supports just three measurements – Length, Temperature, and Weight. But if you are looking to equalize how the Americans say it as against the British, this simple tool should do the job quickly. Put in the figure, select the unit and out pops the equivalent measurement on the other scale. (See Directory mention)
Onlineconversion.com is another simple free online unit converter that has calculators relating to nearly 5,000 units, and 50,000 conversions. They are arranged in categories on the landing page. Check out the Miscellaneous category which has measurement tools for cholesterol, blood sugar, blood-alcohol content, GPA, wind chill, room area, typography, and a lot of other offbeat calculators.
Unit Converters is another simple site to the extent of its interface. Otherwise, the online service is chock-a-bloc with scientific and engineering unit converters ranging from the common to the more technical ones like radiology and magnetism.
The one unique conversion tool I found on this otherwise simple site is the tool that takes a piece of text and converts it into the dots and dashes of Morse Code. The other unit converters relate to the usual lineup of time, distance, pressure, energy and work, volume, speed etc.
Metric-conversions.org is worth a mention not because it contains a unique conversion tool but because it is the only one I came across that lets you download ‘cheat sheets’ of conversion tables in printable formats. Inspite of the presence of one-click online tools, the printable downloads could serve as handy reference.
Converter is a useful Firefox add-on that works seamlessly with any figures you might have on the web page. It works via the right-click menu (select a figure and right click to see the options) or via the neat add-on bar where a single click converts all measurements on the page. You can also setup a custom conversion by right clicking on the icon on the add-on bar and entering your measurement values.
Of course, if you are an expert Google user, you can simply use the Google search bar for some quick fire unit conversions and calculations. You can even use the powerful Wolfram Alpha engine. But these ten web tools do give you broader options. Each one of the ten tools brings something new to the table. Do you have your own free online unit conversion web app to add to the list?
Image Credit: Wikimedia Commons
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If you’re wondering what have been taking up space on your hard disk, then you have come to the right place. In today’s article, we’ll show you how to get rid of unneeded files from your computer.
First of all let’s find out what’s hogging your hard disk. We recommend that you download SpaceSniffer. Once you start it up, it will map your hard drive, and shows big files and folder in your system. SpaceSniffer comes with a user manual that shows you every neat stuff that you can do with SpaceSniffer.
some of our favourite ones are: filtering temporary files …
… or finding files that we have not touched for more than a year; they are usually good candidates for removal.
Among all the files, Pagefile.sys and hiberfil.sys stood out in SpaceSniffer; They occupied six GB of our hard disk.
In a default installation, Windows creates a page file (pagefile.sys) that Windows uses to hold part of a program or memory that does not fit the memory. Microsoft recommends us not to remove this file – even when you have lots of memory. However, we can remove hiberfil.sys from our system, and we wrote an instruction on how to do it.
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