Calculus and Differential Equations tutor

About Phil

My major fields of interest include
Differential Equations, Laplace transforms, and solving most non-linear equations.
Website: goal-driven.net
see CurvFit, FC-Compiler, Match-n-Freq, Robot4, and SpectrumSolvers apps.

I attended Oregon State U. and majored 3 years in Electrical Engineering. Then I switched to a Math major for my final years and graduated with a B.S. in Math. Developed several Apps for Engineers & Scientists.

My first job was with Lockheed Aircraft Co. building the SR-71 (Black Bird). One assignment had me designing the pilot's suit. It was to be 1/4" thick consisting of 5 materials and required to drop the outside temperature from its high to 98 degrees next to the pilot's body temperature. A great math problem!

Another job was at Memorex Corp. designing a "Matched Filter" for a 14" disc drive. This electrical filter was to make a pulse more symmetric and slimmer. The more symmetrical and slimmer a pulse, would help minimize the "Pattern-Induced-BitShift" (PIB). Heavy math problem! (Main LaPlace transform equation took me 22 pages of hand written notes to derive the necessary equations. Oh, those little minus signs kept giving me trouble!)

Next job was at Lockheed Missiles & Space Co. Here I had different assignments. One assignment had me analyzing, what is called Digital Signal Processing (DSP), a plume from a space craft to try and label it as a "Friend or Foe". If its a Friend no problem, but a Foe may require action to be taken or it may shoot you down. :(

After a lay-off in 1991, I started writing my math textbook/casebook. 29 years later the book is done plus a website (goal-driven.net), 4 apps developed, & front-end for a compiler that NASA developed (1960s) to solve math problems very easily. This 'new' language takes a 'automobile' level computer to a 'airplane' level computer. Design solution times drop by (around) 95%; i.e. what took 20 months is now done in less than 1 month and the solution is optimal.