Tolerable Monday
May. 17th, 2010 07:09 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
altivoProbably as good as it gets. Car service took only an hour and cost $20. They found no surprise problems. Conveniently, at lunchtime a coworker who lives in that direction was driving right past the dealership, so she gave me a ride and I got the car back before rush hour.
Straightened out (I hope) a confusion about five new desktop machines I ordered last week when I got the confirmation message and saw sales tax on it. The library is exempt of course, as a local government agency. Had to fax the seller (another) copy of our exemption letter.
Cataloged some odds and ends, retuned some security on the firewall, spot checked bandwidth consumption. Put together small order for computer supplies we need. In spite of threatening sky and forecast, it did not rain all day, or at all for that matter.
In ten free minutes before going home, I found the problem that was keeping Hercules from running on my desktop machine and fixed it. Not that I have any great need of an imitation mainframe at work, but it's good for "gosh golly" effect.
Using Simpson's rule for the algorithm, I got another decimal place of PI on the Alpha. That brings me to 16 decimals. Considerable improvement in time, as well. Using my own algorithm, it took 30 hours of CPU time to reach 15 decimal places. Simpson's converged at 16 decimals in 24.5 hours. My algorithm would have required 300 hours (approximately) to get the same result. ;p
I'm curious to try Romberg's method which is supposed to converge even faster, but I need time to code and test it and that hasn't appeared yet.
Straightened out (I hope) a confusion about five new desktop machines I ordered last week when I got the confirmation message and saw sales tax on it. The library is exempt of course, as a local government agency. Had to fax the seller (another) copy of our exemption letter.
Cataloged some odds and ends, retuned some security on the firewall, spot checked bandwidth consumption. Put together small order for computer supplies we need. In spite of threatening sky and forecast, it did not rain all day, or at all for that matter.
In ten free minutes before going home, I found the problem that was keeping Hercules from running on my desktop machine and fixed it. Not that I have any great need of an imitation mainframe at work, but it's good for "gosh golly" effect.
Using Simpson's rule for the algorithm, I got another decimal place of PI on the Alpha. That brings me to 16 decimals. Considerable improvement in time, as well. Using my own algorithm, it took 30 hours of CPU time to reach 15 decimal places. Simpson's converged at 16 decimals in 24.5 hours. My algorithm would have required 300 hours (approximately) to get the same result. ;p
I'm curious to try Romberg's method which is supposed to converge even faster, but I need time to code and test it and that hasn't appeared yet.
