Archive for January 20, 2020

Not the Open Journal of Astrophysics Impact Factor – Update

Posted in Open Access, The Universe and Stuff with tags , , , , on January 20, 2020 by telescoper

Now that we have started a new year, and a new volume of the Open Journal of Astrophysics , I thought I would give an update with some bibliometric information about the 12 papers we published in 2019.

It is still early days for aggregating citations for 2019 but, using a combination of the NASA/ADS system and the Inspire-HEP, I have been able to place a firm lower limit on the total number of citations so far for those papers of 408, giving an average citation rate per paper of 34.

These numbers are dominated by one particular paper which has 327 citations according to Inspire (see above). Excluding this paper gives an average number of citations for the remaining 11 of 7.4.

I’ll take this opportunity to re-iterate some comments about the Journal Impact Factor. When asked about this my usual response is (a) to repeat the arguments why the impact factor is daft and (b) point out that we have to have been running continuously for at least two years to have an official impact factor anyway.

For those of you who can’t be bothered to look up the definition of an impact factor , for a given year it is basically the sum of the citations for all papers published in the journal over the previous two-year period divided by the total number of papers published in that journal over the same period. It’s therefore the average citations per paper published in a two-year window. The impact factor for 2019 would be defined using data from 2017 and 2018, etc.

The impact factor is prone to the same issue as the simple average I quoted above in that citation statistics are generally heavily skewed and the average can therefore be dragged upwards by a small number of papers with lots of citations (in our case just one).

I stress again we don’t have an Impact Factor for the Open Journal. However, for reference (but obviously not direct comparison) the latest actual impact factors (2018, i.e. based on 2016 and 2017 numbers) for some leading astronomy journals are: Monthly Notices of the Royal Astronomical Society 5.23; Astrophysical Journal 5.58; and Astronomy and Astrophysics 6.21.

My main point, though, is that with so much bibliometric information available at the article level there is no reason whatsoever to pay any attention to crudely aggregated statistics at the journal level. Judge the contents, not the packaging.


R.I.P. Jimmy Heath (1926-2020)

Posted in Jazz with tags , , , , on January 20, 2020 by telescoper

I heard last night the sad news that saxophonist arranger and bandleader Jimmy Heath had passed away at the age of 93. Jimmy Heath was a terrific musician whom Miles Davis described as `one of the thoroughbreds’ and who performed on a huge number of really important records as leader or as sideman throughout a long career than spanned seven decades.

I spent last night going through the part of my record collection that I have here in Maynooth to select a track to play as a small tribute, and came up with this up tempo track on a Blue Note collection. It’s standard written by Harold Arlen called Get Happy. I hadn’t listened to it for ages and I’d forgotten how great it is. It was recorded in 1953 by a six-piece band led by trombonist Jay Jay Johnson, and featuring Clifford Brown (trumpet), Jimmy Heath (tenor saxophone), John Lewis (piano), Percy Heath (bass, Jimmy’s brother*) and Kenny Clarke (drums). They’re all great musicians, and they make a wonderfully rich ensemble sound for a small band. Jimmy Heath plays a fine solo, rather typical of his early style (which, although he plays tenor sax rather than alto is clearly in the mould of Charlie Parker) and you also get the chance to hear the great Clifford Brown .

*Jimmy’s other brother Albert Heath was a fine drummer.

R.I.P. Jimmy Heath (1926-2020)