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  1. someonesdad

    Following Errors in Computations

    A good article for propagation of error is in NBS Special Publication 300, Vol. 1 (1969), called "Precision Measurement and Calibration". The article is by Harry Ku (also the editor of the volume); the article is entitled "Notes on the Use of Propagation of Error Formulas". It's a bit more...
  2. someonesdad

    Visual Basic

    One option is to not translate it at all. I haven't used it, but the MinGW distribution comes with a Pascal compiler (IIRC, it might be an early version). I used MinGW as my default C/C++ compiler on my Windows 2000 box. Check out http://www.mingw.org/. Also, a Pascal to C translator program...
  3. someonesdad

    Porting a Windows NT C++ app to XP platform

    Both Microsoft and Borland try to keep you tied to their products. I found this out writing an app in an early version of C++ Builder, then later realizing I couldn't port it anywhere because of the Borland-specific stuff that I had used. Pragmatically, your best bet might be to purchase a...
  4. someonesdad

    How high of a degree should I get?

    I'd recommend a couple of years of on the job experience, then go back to school. It's especially nice if you can get the employer to pay for it. Where I used to work, some lucky souls would get 75% salary and get to go off somewhere to grad school for a year or two on a fellowship. Others...
  5. someonesdad

    Lack of Self-Confidence at work

    There have been many good comments on this thread. I think most of us at one time or another have felt what OilBoiler expressed. I think the most important thing to never let go of is the desire to know "why". Why do we do things this way? Why did that machine break there? Why did that...
  6. someonesdad

    Important job applicant skills

    I think back on what I was like when young (cocky, dogmatic, and know-it-all) and can see why some of those kids behaved and appeared the way they did. Of course, the rest of us senior people know those kids were just continuing their education outside of school; they just didn't know it. Nor...
  7. someonesdad

    Salary??

    I'm not sure how to judge; my current pay is higher than the 75th percentile number they quote. However, I'm working for this company as a contractor rather than as a direct employee and it's pretty well known that contractors get paid more because they don't get any benefits. I did work for...
  8. someonesdad

    copying random files in sub-folders

    Hmm, doesn't look like this C++ category on Eng-Tips gets used all that much. I just joined and expected to see a bit more activity... :^) I think what would be fine for your needs would be to use the standard C library function rand(). It returns a "random" integer; I use quotes around...
  9. someonesdad

    Force required to spin shaft

    Lowering the moment of inertia of the roller will reduce, but probably not eliminate potential scratching. The significance of inertia depends on the acceleration profile of the film. A way to reduce the bearing friction (a small contributor, I'll bet) would be to switch to an air bearing...
  10. someonesdad

    How to duplicate thread tables in Machinery's Handbook

    Excellent! israelkk, thanks for the URL -- it looks like a great place to search for federally-related specs in the future. The federal ones on threads I downloaded and looked at seemed mostly to reference the source ASME documents. Thus, I think I'll take Screwman's and FredGarvin's advice...
  11. someonesdad

    How to duplicate thread tables in Machinery's Handbook

    I am writing a program that I would like to have duplicate the basic toleranced thread dimensions in Machinery's Handbook (pg. 1276, 19th ed. or pg. 1736, 27th ed.). The book states "... are derived from certain Unified formulas (not shown here) in which the pitch diameter tolerances are based...

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