Re: [LEAPSECS] but what does Daniel Gambis say?

2008-08-28 Thread Rob Seaman
Right. That's a better way of saying it. The paper doesn't describe the numerical techniques well enough to critique them. There is some sort of linear component to the fit, but it doesn't appear to correspond to the tidal slowing term. Perhaps clues are buried in the references. -- O

Re: [LEAPSECS] but what does Daniel Gambis say?

2008-08-28 Thread Poul-Henning Kamp
In message <[EMAIL PROTECTED]>, Rob Seaman writes: >The 222 year period is most likely a meaningless artifact of the >data. Likely lack of DC removal and/or deficient windowing before running the FFT I suspect they used. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED

Re: [LEAPSECS] but what does Daniel Gambis say?

2008-08-28 Thread Rob Seaman
Serbian Astronomical Journal, including mention of negative leap seconds http://arXiv.org/pdf/0808.3612 Timekeeping is one of those narrow disciplines where peer review implies small number statistics. So this paper joins others of suspect validity such as: Deines & Williams (2007, AJ

Re: [LEAPSECS] but what does Daniel Gambis say?B

2008-08-28 Thread Clive D.W. Feather
François Meyer said: > http://arXiv.org/pdf/0808.3612 > > As the authors write, this is a pure mathematical > prediction ; of course the agreement between the > model and the data is excellent for the period > covered by data, but with 17 harmonic terms it could > hardly be different. How many da

Re: [LEAPSECS] but what does Daniel Gambis say?B

2008-08-28 Thread Tom Van Baak
To be more convincing I'd like to see what happens to their model if they used 5, 10, or 15 terms instead of 17. Plotting the quality of fit against the number of terms used would be revealing. Also I'd like to see what happens to their projections if they used a shorter or longer range of dates.

Re: [LEAPSECS] but what does Daniel Gambis say?B

2008-08-28 Thread Poul-Henning Kamp
In message <[EMAIL PROTECTED]>, =?ISO- 8859-15?Q?Fran=E7ois_Meyer?= writes: >Now, though it is hard in the >paper to figure it accurately, Look at figure 4, the appropriate caption would have been "Our model is bunk". Apart from forcing some poor undergraduates though a lot of math, this paper

Re: [LEAPSECS] but what does Daniel Gambis say?B

2008-08-28 Thread François Meyer
On Wed, 27 Aug 2008, Steve Allen wrote: Serbian Astronomical Journal, including mention of negative leap seconds http://arXiv.org/pdf/0808.3612 As the authors write, this is a pure mathematical prediction ; of course the agreement between the model and the data is excellent for the period cov

Re: [LEAPSECS] but what does Daniel Gambis say?

2008-08-27 Thread Magnus Danielson
Steve Allen wrote: Serbian Astronomical Journal, including mention of negative leap seconds http://arXiv.org/pdf/0808.3612 Notice the detail that of the only projected leap second in the period 2006-2024, it was predicted to 2008. This matches the achieved pattern so far. It would be inter

[LEAPSECS] but what does Daniel Gambis say?

2008-08-27 Thread Steve Allen
Serbian Astronomical Journal, including mention of negative leap seconds http://arXiv.org/pdf/0808.3612 -- Steve Allen <[EMAIL PROTECTED]>WGS-84 (GPS) UCO/Lick ObservatoryNatural Sciences II, Room 165Lat +36.99855 University of CaliforniaVoice: +1