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  1. cah2oeng

    Calculations

    I heard that "the whole nine yards" refers to some type of WWII aircraft whose cannons held 27' (9 yards) worth of ammunition. When the fighter came into contact with an enemy aircraft and expended all of his ammo, he told them "I gave him the whole nine yards." I have no idea where I heard...
  2. cah2oeng

    Water Supply System References?

    Hi -- I'm am just about to switch gears in my career of high-end water resources research (academic) to the professional consulting world. One of my first projects with this new company will be putting together "Drinking Water Master Plans" for eight individual military installations. While I...
  3. cah2oeng

    Hot-Shot Civil Engineering Firms

    Those last two questions would probably elicit a good response in the "Starting and Running an Engineering Business" forum on this site.
  4. cah2oeng

    Hot-Shot Civil Engineering Firms

    I know in many professions, such as Accounting, Finance, or Marketing, there are the "Big Firms" that pretty much hire the best of the best (Deloitte & Touche, Accenture, Proctor & Gamble, etc...). Many of those jobs are considered prestigious by their peers, and slouches typically need not...
  5. cah2oeng

    I need guidance.......

    miprimo, I'm not exactly sure what you're looking to do, but if you're looking to do the job of a civil engineer, you're wasting your time if you do not get a civil engineering degree. Even if you do learn the principles and theory from a book or two, you'll never get paid as much as a...
  6. cah2oeng

    Recognizing "sinusoidal" signal

    You can take the fourier transform of any signal, regardless of length, so the short nature of this data wouldn't preclude its use. However, it sounds like you've tried that route. What about using a correlation algorithm? In my line of work, we use these to track a particular pattern as it...
  7. cah2oeng

    Recognizing "sinusoidal" signal

    This certainly won't solve your problem entirely, but to shed more light on the situation you could try performing a spectral analysis on the signal (i.e. take the DFT of the signal). That would at least tell you how much power is alloceted at each frequency.
  8. cah2oeng

    3-D dot product?

    Good idea, Dr. Mike. Thanks for the help. Saves me MASSIVE computing time. Seems like the Mathworks guys would just make something like this a built-in function for us dummies. ;)
  9. cah2oeng

    Can someone check my work, please?

    How 'bout them irish? Maybe touchdowns should be worth 10 points so the math would be easier. Discuss. ;)
  10. cah2oeng

    3-D dot product?

    I'd like to multiply a 1-D vector by a 2-D array without using a loop. Here's what I currently have: A = ones(10,10); z = 1:10; for i = 1:length(z) result(:,:,i) = z(i)*A; end Is there any way to do some sort of dot product between z and A that achieves the same result? Thanks
  11. cah2oeng

    Matlab - Compare 2 array values

    Hot damn... That is pretty good. I've had the same problem in the past. Thanks for the info!
  12. cah2oeng

    Image Acquisition Toolbox v. 1.5

    I know this is a long shot, but has anybody here ever used the Image Acquisition Toolbox to get images via a firewire connection? I'm having MAJOR problems with it and am now on a first name basis with the Mathworks troubleshoot guys.
  13. cah2oeng

    Can someone check my work, please?

    Uh, you may want to check your dynamic viscosity. I think you're about 5 orders of magnitude too large. Looks like that'll solve your "seems off" problem.
  14. cah2oeng

    Shifting an image using the image processing toolbox

    I actually have a similar need as well, but instead of a uniform shift in x, I'd like to have the shift in x be a function of y. Not sure this is even possible, but it's worth a try since right now, I am shifting pixel by pixel in with a fortran script.
  15. cah2oeng

    Hydraulic/Environmental Data -- How do YOU get it?

    Hello, I'm doing a bit of research on how consulting firms and hydraulic modelers accomplish their environmental data collection, specifically obtaining flow rates, contaminant concentration, temperature, dissolved oxygen, etc... in rivers, lakes, and near shore coastal environments. Many...
  16. cah2oeng

    Hydraulic/Environmental Data -- How do YOU get it?

    Hello, I'm doing a bit of research on how consulting firms and hydraulic modelers accomplish their environmental data collection, specifically obtaining flow rates, contaminant concentration, temperature, dissolved oxygen, etc... in rivers, lakes, and near shore coastal environments. Many...
  17. cah2oeng

    INCREASED "n" FACTOR TO REDUCE VELOCITY??

    Have you calculated the expected velocities if you just go with standard RCB? If so,what's the problem with having the high velocities?
  18. cah2oeng

    flow measurement units

    "Normal Conditions" (i.e. 0 deg C and 760 mmHg) You also may see "scfm" which is "standard ft^3/min" (standard conditions being 60 deg F and 14.7 psi).
  19. cah2oeng

    INCREASED "n" FACTOR TO REDUCE VELOCITY??

    What's the problem with using the drop structure?
  20. cah2oeng

    Writing to/Reading from a subdirectory?

    I'm not sure if there's a more elegant way, but since there is no "path" option for the OPEN command, you must include the path in the file name: c Example program character*80 outdir,outfile character*160 fullname outdir='NameofSubdir\'...

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