What is Data Recovery? - A brief Introduction

Written by Simon Steggles - www.disklabs.com

What is Data Recovery?

Data Recovery isrepparttar process of retrieval of inaccessible or corrupt data from digital media that has become damaged in some way. Data Recovery can be used to recover data from devices as varied as Hard Disk Drives, Memory Cards, Tapes, Mobile Phones, Personal Digital Assistants, Floppy Disk’s, CD’s, DVD’s, Data Cartridges, Xbox’s and many more items.

Data Recovery may be needed for reasons as diverse as hardware failure, (the tape has been ‘chewed’ up,repparttar 148754 hard disk drive has failed,repparttar 148755 user has maliciously damagedrepparttar 148756 computer or digital device, or it could have suffered fire or flood damage). All of these instances will requirerepparttar 148757 services of a professional data recovery company ifrepparttar 148758 data was of such value (be it sentimental or financial) thatrepparttar 148759 cost ofrepparttar 148760 services are less thanrepparttar 148761 perceived value ofrepparttar 148762 data which is no longer accessible.

It is not just businesses who are at risk from Data loss. Clients requiring data recovery come from all walks of life, including large corporates, smaller businesses, andrepparttar 148763 self employed to “joe public” who, withrepparttar 148764 introduction and subsequent boom inrepparttar 148765 use of digital cameras etc to record holidays and special occasions may have lost anything from sentimental data to critical e-mails, and personal account details. Students are often grouped under this heading too.

There are numerous ways that Data can be recovered from digital media which can vary greatly,repparttar 148766 simplest method can often involverepparttar 148767 running of basic software onrepparttar 148768 storage medium in question. This is always a dangerous idea, becauserepparttar 148769 recovery data could overwriterepparttar 148770 very data that is being recovered. More complex commercial software tools are available which will do this job more professionally. No software fix should be attempted prior torepparttar 148771 original media being imaged, enablingrepparttar 148772 recovering company to work on a ‘back-up’ ofrepparttar 148773 original software. The most professional companies will also take a second image should there be a problem withrepparttar 148774 first image that is being worked on for recovery.

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Why There Are Color Differences in Printing from your PC

Written by Paul Curran

This article describesrepparttar basic properties of color, whatrepparttar 148753 relationships are between them andrepparttar 148754 differences between what you see and what you actually get using your inkjet cartridges.


Most of you will have come across these three; Hue, Saturation and Brightness; if you have ever messed around with color settings of your images.

Hue: For example; blue, green and violet are all hues. They are colors. The dictionary definition of 'Hue' is; "the attributes of colors that permits them to be classed as red, yellow, green, blue or an intermediate between any adjacent pair of these colors."

Saturation: This refers to how vividrepparttar 148755 color is. The higherrepparttar 148756 amount of gray relative torepparttar 148757 amount of hue,repparttar 148758 less vivid it will be.

Brightness: Relates torepparttar 148759 relative darkness or lightness ofrepparttar 148760 color.

In 1905 American artist A. Munsell published a color measurement system, namingrepparttar 148761 three parameters, Hue, Value and Chroma (Hue, Saturation and Brightness as above). This three dimensional relationship resulted in color identification in this format, for example; 7.5YR 7/12. Here we have a yellow-red hue tending with a value of 7 and a chroma of 12. There are 40 pages inrepparttar 148762 book covering all colors inrepparttar 148763 complete Munsell system.

Monitor and printer color production

Printer: Printer colors are produced from inkjet cartridges emitting minute patterns of ink dots placed on paper. All colors that you see come from just four colors; cyan (C), magenta (M), yellow (Y) and black (K).

As an aside, a mixture of cyan, magenta and yellow should produce black, but in reality a touch of black is needed to get it.

Monitor A phosphor is a substance that emits light when subjected to radiation. Color phosphors are illuminated with electrons in your monitor and hence images are produced. There are three colored phosphors in each pixel onrepparttar 148764 screen; red (R), green (G) and blue (B).

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