Saturday, February 16, 2008

Comparing different PC Buses

The main listing of Personal Computer Bus description is listed on the Personal Computer Buses page. In addition to providing links to almost all of the different styles of PC buses the page provided a table comparing each of the different types of interfaces and their transfer speeds.

I notice in one of the server reports that shows relative down loads vs. page size that the page was using up a lot of bandwidth relative to other pages.

So in order to save a little bandwidth the table was reduced in size by only showing the final version of the expansion bus. Previous versions of a given spec were removed from the table, reducing the size of the page.

Not wanting to lose any data, the complete table was moved to it's own page; Comparing PC Buses.

Tuesday, February 12, 2008

MIL-HDBK-217F Environments

Military Handbook 217 [MIL-HDBK-217]; Reliability Prediction of Electronic Equipment provides a means to calculate the reliability of systems based on the components used with in the system.

The definition for Mean Time Between Failure (MTBF) from MIL-HDBK-217F is located on the MTBF Definition page. The MTBF page contains its main link off the Engineering Dictionary page or Electronic acronyms page.

MIL-HDBK-217 provides for a number of Environments in which equipment may be operated in, the new pages added list the different types of Environments:

Ground Systems Environments,
Naval Systems Environments,
Airborne Systems Environments,
Space Systems Environments.

Each Environment definition contains a number of sub-Environments, with each page describing the terms and definition. A related page lists Military Specifications.

Sunday, February 10, 2008

404 Page Not Found

I just came across a page that was never up-loaded, so it returned a 404 code when I checked the status. The page cover Mezzanine Board sizes and appears to be an extension of the listing for Industrial Board Formats page. How ever I can't find which page links to it, so now that it's been up-loaded it's a orphan page. An orphan page is a page that has no other pages with in the same site that point to it.

That missing page would never show up in any of the site stats or reports because the page was never uploaded and had no other pages that point to it.