Author: John
Deleting files based on their Date
If you are perfoming regular automated backups (like you should), You’ll soon find you are running out of space and need to start deleting old backups. Here is a really simple way to delete files that are more…
Read More »Protect your data before you lose it
Like a lot of other computer users, I seem to have a lot of data which is irreplaceable. Not including music and video (since I have the originals on disk anyway) I’m still pushing almost 1TB (1000GB). This…
Read More »Cheap Counter for machinery
A friend of mine has been looking for a cheap counter to use in his factory for counting production from machines. He currently uses some of the mechanical counters but these are starting to fail. Electronic counters cost…
Read More »Space Shuttle Update
Space shuttle Discovery is about 3 hours away from their de-orbit burn for an expected landing of (17:39 UTC). NASA are about to start their go/no-go poll to close the payload bay doors.
Read More »Image Editing in C# – Contrast
When attempting to get machines to process images you sometimes run into noise problems. Filters are regularly applied first to clean them up. Editing the contrast of an image changes its dynamic range. In its most basic form,…
Read More »Comments now require a CAPTCHA to be completed
I’ve been getting around 200 spam comments a day on this site and had to manually sort through them to find the non spam comments. This morning I was finally fed up with comment spam on this site…
Read More »Image Editing in C# – Greyscale
I’m in the process of writing some code to detect the stars in astromical images. One of the filters I need to apply to an image is to convert it to greyscale. Conversion to greyscale is relatively straightforward…
Read More »More debris on it's way to the space station
While the shuttle is on it’s way to the station, more debris is inbound. NASA are deciding what to do. They may boost the station up a bit which will mean that the shuttle will get there a…
Read More »TLES – First Time Derivative of the Mean Motion
This post is part of a series on understanding the meaning behind the values contained in a Two Line Element set, or Keplerian Elements. The main article is here. First Time Derivative of the Mean Motion Engineers like…
Read More »TLEs – Epoch Year and Day
This post is part of a series on understanding the meaning behind the values contained in a Two Line Element set, or Keplerian Elements. The main article is here. Epoch Year and Day The epoch is simply the…
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