[Introduction] [Signal arithmetic] [Signals and noise] [Smoothing] [Differentiation] [Peak Sharpening] [Harmonic analysis] [Fourier convolution] [Fourier deconvolution] [Fourier filter] [Wavelets] [Peak area measurement] [Linear Least Squares] [Multicomponent Spectroscopy] [Iterative Curve Fitting] [Hyperlinear quantitative absorption spectrophotometry] [Appendix and Case Studies] [Peak Finding and Measurement] [iPeak] [iSignal] [Peak Fitters] [iFilter] [iPower] [List of downloadable software] [Interactive tools]

The first Web version went up in 1996, but I didn't start keeping track of views until 2008; since then there have been over

The Internet Service Providers with the largest number of views are Comcast, Verizon FIOS, Time Warner, Cloudflare, At&t U-verse, Deutsche Telekom (Germany), BSNL (India), and Cox Communication. Most views worldwide come from Windows machines, about 20% from Linux and Macintosh, and 10% from mobile devices. I've made efforts to make my pages more usable from mobile devices like smartphones.

About one quarter of the views come

Many of the large national laboratories are users, including Bell Canada, Oak Ridge, Pacific Northwest, Lawrence Livermore, Sandia, Brookhaven, National Renewable Energy Laboratory, SLAC, FermiLab, Lawrence Berkeley, NRC Canada, CERN, NIST, NASA, JPL, and NIH.

The most popular pages on the site recently have been Peak Finding and Measurement, Smoothing, Integration, Deconvolution, InteractivePeakFitter, and Signal Processing Tools. About 50% of the page views originate from search engines (80% of those using Google). The most common search keywords used are: "peak area", "convolution", "deconvolution", "peak detection", "signal processing pdf", "findpeaks matlab", "Fourier filter", and "smoothing". About 40% of the traffic comes from direct links (bookmarks or typed URLs) and about 10% comes from referring websites, usually from Wikipedia or from MathWorks. Unfortunately, page loads and search terms have become almost completely encrypted in recent years, so I can no longer tell which pages are being viewed and what is being download. (Interestingly, that is not the case with Interactive Computer Models for Analytical Chemistry Instruction, which has only 75% encryption).

There have been over 100,000 downloads of my software and documentation files, currently averaging several hundred file downloads per month, from both my web site and from my files on the Matlab File Exchange. The most commonly downloaded files are IntroToSignalProcessing.pdf, PeakFinder.zip, ipf12.zip, CurveFitter....xlsx, iSignal6.zip, ipeak7.zip, PeakDetection.xlsx, and the complete site archive SPECTRUM.zip.

I also investigated the effect of other factors that might be more specific to the language and subject matter of my particular site, including

- the number of
*English speakers*in each country, - the number of
*Internet users*, - the number of
*universities*, and - the total
*research and development budget*of each country.

A log-log

For an Excel spreadsheet with all these data and calculations (between 2008 and 2015), see FinalCountriesSummary.xlsx

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