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Latest Impact Factors from Astronomy and Nuclear & High Energy Physics Journals

Latest Impact Factors from Astronomy and Nuclear

We are pleased to bring you the latest Impact Factors from Elsevier's Astronomy and Nuclear & High Energy Physics journals. Highlights include...

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Radiation Measurements

2007 Impact Factor
WAS
1.054

2008 Impact Factor
NOW
1.267

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Applied Radiation And Isotopes

2007 Impact Factor
WAS
1.008

2008 Impact Factor
NOW
1.114

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Calculating Impact Factors

WHAT IS AN IMPACT FACTOR?
The journal impact factor is a measure of the frequency with which the average article in a journal has been cited in a particular year. The impact factor helps you evaluate a journal's relative importance, especially when you compare it to others in the same field. The impact factor is calculated by dividing the number of citations in the current year to articles published in the two previous years by the total number of articles published in the two previous years.

Using Journal X as an example:
Cites in 2007 to articles published in:2006
2005
Sum
= 1266
= 1643
= 2909
Number of articles published in:2006
2005
Sum
= 352
= 364
= 716
Calculation:Total cites to articles
published in 2005 and 2006
2909= 4.063
Number of articles
published in 2005 and 2006
716

The 2007 Impact Factor for Journal X is 4.063