Messages

1

Announce Your Software/Service/Product / seeking Math Continuous Simulations that we could try solving

« on: June 07, 2024, 06:47 PM »

We are seeking Math Continuous Simulationsthat we could try solving with our new Calculus (Level) Language that produces an Optimization of Simulations.

To understand Differential Equations (DEs), classes in Engineering and Science are essential.  See my Casebook titled "Engineering Design Optimization using Calculus Level-Methods; A Casebook Approach",  https://goal-driven....ebook%20Approach.doc
  One reviewer wrote: "The most important pedagogical value the book could deliver is a sound grounding in calculus level thinking for engineering design optimization. This approach is as significant for engineering/science as object oriented programming has been for computer science.  Independent access to a computer system running the calculus tools would free the reader from having to attend a class. This would open up the market for the book quickly to practicing engineers." Unknown Reviewer.

  Their are some 20+ Engineering and Science problems showing their math problems and Optimal solution.  Plus a little write-up / intro to each problem.

FortranCalculus™ application is a (free) Calculus (level) Compiler that simplifies Tweaking parameters in ones math model. FC is based on Automatic Differentiation (AD) that simplifies computer code to an absolute minimum; i.e., a mathematical model, constraints, and the objective (function) definition.  Equations may be implicit, non-linear, Boundary Value Problems, Inverse Problems, nesting, etc. Download, install, & execute some demo problems. Simple and its Free!

FC removes the need for users to write their own numerical methods. Users just call a method by name that is stored in a compiler library. Nice and simple from a users stand point. NASA's Apollo Space program started AD development around 1960.

Have you been able to run a demo? View output from demo? Let us know if we can help.
---

Have a math model that we could try to solve?  We may want to publish your code and its solution in our casebook, if you say its okay.

2

Found Deals and Discounts / Math Website with 5+ Apps for Engineers/Scientists/STEM

« on: May 21, 2024, 01:08 PM »

I'm seeking someone who wants a website that has 5 Apps for Windows:
•   CurvFit™ application solves fitting data to an math expression; recommend the Lorentzian series for real world data problems. Sine & Damped Sine series are also available.
•   FC-Compiler™ application is a (free) Calculus (level) Compiler that simplifies Tweaking parameters in ones math model.  FC solves Algebraic through Ordinary Differential Equations; Laplace transforms; etc. FC is based on Automatic Differentiation that simplifies computer code to an absolute minimum; i.e., a mathematical model, constraints, and the objective (function) definition.
•   ODEcalc™, an Ordinary Differential Equation (ODE) Calculator!  Solves Nonlinear ODEs. State your equation, boundary/initial value conditions and it solves your problem!
•   Match-n-Freq™ solves pole/zero locations for a matched filter that is known for pulse slimming or shaping characteristics. Program determines optimal transfer function, H(s).; and,
•   SpectrumSolvers™ provides 13 spectral estimation algorithms for comparing Power Spectral Density (PSD) results. Algorithms include Akaike, Burg, Durbin, Maximum Likelihood Method, Mayne-Firoozan, Prony, Yule-Walker, and et al.

These Apps are for Engineers/Scientists; e.g., one app is a Calculus (Level) Compiler that can solve most continuous math models.  My site has been in development for 30+ years and has 400+ visitors per day [just hit 500 for the 1st time ].  Google suggests it will bring in $5,000 / month!

My website, goal-driven.net, tries to show Engineers / Scientists how to solve their math problems from industry. The key is a (free) Calculus (Level) Compiler that solves most continuous math problems in Industries.

My compiler got its start at NASA's Apollo Space program back in the early 1960s. Known as Slang back then, it got the USA to the moon and back. When introduced to Industries in 1974, it was then was called PROSE. Today it is FortranCalculus (FC).

If you were a manager or CEO and had the choice of a simulation design versus an optimization design, which would you pick?

Train Educators: Continuous Modeling, Simulation’s & (Mathematical) Optimizations.  Optimizations require an Objective (function).  Today's Engineers & Scientists solve problems with a “Find X” mind-set.  With some Operational Research training they could expand their thinking to a “Find X to Optimize Y” mind-set.  Then they would be ready for Optimizations, Calculus (level) programming and software.  (This would drop today’s design times that require months even man years to one or two days!  Manufacturing processes could be optimized to the days demand and thus maximize their profits.)

“Find X to Optimize Y” thinking among professors will cause most Engineering & Science textbooks to be rewritten with optimization examples and discussions.  This will be great stuff for industries and government; applied engineering and/or science not just theories.

Marketing is the only step left before my website is completely functional, interested?

Phil Brubaker
Mathematical Engineer / Author
Oregon State University '67

3

General Software Discussion / Re: Visual Basic 6 App.s in need of way to charge for usage, ideas?

« on: November 05, 2023, 04:59 PM »

After a certain timeout, the usage session is terminated but the terminal keeps running on the server.

Your offer sounds good to me.
-OptimalDesigns (Today at 07:20:15 AM)

Wonderful! The sooner we start the better!

Please send the first $100 paypal to [email protected] to begin development

-publicdomain (November 05, 2023, 11:44 AM)

Please download the CurvFit App, install it, and run a few demo files to get an idea on how things flow.

I sent you $100 via PayPal just a few minutes ago

4

General Software Discussion / Re: Visual Basic 6 App.s in need of way to charge for usage, ideas?

« on: November 05, 2023, 09:23 AM »

Oh! By the way, if you choose to go with me, it would be awesome to have your permission to "share the journey" here from the technical side (nothing specific/private from your project, but regarding the technological side itself --i.e. the actual software stack and its interconnections / how to's).

This can add to a great set of interesting DC articles... you don't really get to see much of "Connect VB6/DOSBOX to Paypal IPN" these days!

-publicdomain (November 04, 2023, 06:04 PM)

It okay with me ... great idea

5

General Software Discussion / Re: Visual Basic 6 App.s in need of way to charge for usage, ideas?

« on: November 05, 2023, 09:20 AM »

Hello Phil, you need to setup a SaaS on a Windows VPS with payment provider integration (Paypal IPN, other).

There must be a running HTTP service on the VPS that handles translation of the user input that comes from the browser and maps it to your Windows app.

If it is a remote terminal emulator you're after, I can see a service based on something like Xtermjs (http://xtermjs.org).

If it is forwarding input to the GUI of your Visual Basic 6 app, then any front-end framework that matches the input fields you have can do (Foundation, SemanticUI, other).

If you want pixel-by-pixel mirroring of the VB6 program to the web client, that's harder to do yet possible. You don't want VNC, you want to redirect/buffer a single Window instance per paying customer into the authorized web browser.

This is not a trivial project. Since it is more on the commercial/enterprise side, you may want to negotiate with an "old timer" full-stack developer that understands both modern front-end and traditional back-end. Ideally, someone with experience since the DOS/VB6 era who's also active with modern technologies.

Good news: I fit the bill & suit the skills!

-publicdomain (November 04, 2023, 02:55 PM)

Hmm, could you put this in simple english for an old guy, please?

Your offer sounds good to me.  More on my idea.  2 Apps are free for anyone to use; the other 3 would be charged after say one week of free usage.  If either of 3 is charged, then ALL may be used under the umbrella.

The monthly charge/fee should be $30 as of today.

A terminal running 24/7, how is this done?

Phil

6

General Software Discussion / Visual Basic 6 App.s in need of way to charge for usage, ideas?

« on: November 03, 2023, 11:28 AM »

5 App.s have a Windows front-end written in Visual Basic (6) that submits a DOSbox program for executing.  I would like to charge for usage after 'x' days of usage similar to streaming TV channels due; i.e., no usage then no charges until usage begins again.

Each DOS app may be started with the front-end OR a batch file that by-passes the front-end.  After 'x' days, these runs must verify that it is a 'paying' customer.

Anyone interested in solving this problem?

7

General Software Discussion / Seeking Web Partner to handle Google Merchant Center & other marketing/sales

« on: September 16, 2023, 10:56 AM »

updated ... see https://www.donation...ic=54188.0;topicseen

8

General Software Discussion / Method of Lines (MOL) for solving Partial Differential Equation(s) (PDEs); needs

« on: September 11, 2023, 11:35 AM »

My website, goal-driven.net, shows how to solve most (continuous) math problems, but needs some MOL examples showing equation necessary to solve a given PDE; e.g. Schrodinger, Maxwell, telegraph, wave, etc.  You provide
1. MOL & PDE equations;
2 a description of where you/they are used in industry(s); and,
3. Your Title & Name & email address (?), e.g. President: Tom Jones, [email protected]
#2 & 3 will be placed as 'Ads' on my website to bring you some business

Think marketing/sales when stating a description.  Here is an example PDE.  I'm seeking 5 examples, the best 5 win!

In return, I'll publish #2 & 3 on my website AND provide you with a copy of my (free) Calculus (Level) Compiler that can solve PDEs using MOL.

9

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 10, 2023, 03:26 PM »

Changed "max-height" to "height" in code and job is finished

Thanks for all the help.

10

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 08, 2023, 09:44 AM »

FortranCalculus.

11

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 07, 2023, 10:22 AM »

Finally, please provide all the keywords to highlight, for me to create a custom highlighter suitable to your use case

-publicdomain (September 07, 2023, 07:28 AM)

Not sure what you mean.  Keywords?  Highlight?

12

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 07, 2023, 04:57 AM »

Yes.  Downloaded geshi.tar.gz now what?

-OptimalDesigns (September 06, 2023, 05:34 PM)

*.gz file ... assume that's some type of compressed file.  How does one un-compress it in Windows OS?

Updated example-code.txt file and attached it.  There are several <DIV> stmt.s now.  They look okay?  Now need to get GESHI PHP uploaded to my website.

13

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 06, 2023, 05:34 PM »

Is your requirement is to have the exact software powering the DonationCoder code tag on your website?  If so, then PHP is needed.

Do you have PHP on your server?

-publicdomain (September 06, 2023, 12:58 PM)

Yes.  Downloaded geshi.tar.gz now what?  Yes, PHP is on my server.

14

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 06, 2023, 09:47 AM »

[Select]

<pre><code style="height: auto; resize: vertical;">

Did that, nogo.  When I enter a 'code' line here on donationCoder, it gives my the 'msg. window' I'm trying for just like here on this reply.

15

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 04, 2023, 08:28 AM »

<style>
code {
    max-height: 40em;
    resize: vertical;
}
</style>

Not opening a 'msg. window' on a webpage for each code command.  It just grays the code, kind of highlighting it.

16

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 02, 2023, 10:54 AM »

code {max-height: 40em; resize: vertical; }

Some code blocks need to be just a line or two.  Any way to  do this too?

17

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 02, 2023, 02:35 AM »

Looks great!  Will be testing it next week, thanks for the help 

18

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 01, 2023, 06:31 PM »

A) If the "window" is in-page, you can use a floating div.

-publicdomain (September 01, 2023, 05:45 PM)

Vic, option 'A' should do it.  Phil

19

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 01, 2023, 05:36 PM »

I'm trying to create a 'window' like we use to send msg.s from, but with my <pre><code> ... </code in it.  No, not highlighting it.  Here is a link that will show you what your highlighting did.  The article html code is attached.

20

Developer's Corner / Re: Need code inserted into window with scrollbars; fixed percent width and height?

« on: September 01, 2023, 03:40 AM »

Can't the regular TextArea handle that? Then the user can drag the corner to any size they want. And it will automatically handle the scrollbar.

-Deozaan (August 31, 2023, 04:02 PM)

I'm talking about a blank webpage ... need html code for the job.

21

Developer's Corner / Need code inserted into window with scrollbars; fixed percent width and height?

« on: August 31, 2023, 03:03 PM »

I have a large listing of code that needs to be put into a window, as done here automatically.  Nice to let user drag height to what is best for them.  Presently, code is just following:

<pre><code>
ooo
</code></pre>

How to put this in a window with scrollbars on a webpage?

22

Living Room / Google Merchant Disapproved Invalid (1 country), How do I fix this?

« on: August 31, 2023, 11:50 AM »

I have 5 software Apps, they are all 'free software' that are for an Educational purpose And some also for Business as well.  My feed shows Target Countries as having ALL countries.  Is this the problem as some posts have said so.  If so, how to remove those which should NOT be included?  How many need removing?

At present, my biggest users (ie. downloaders) is China ... 30X that of next largest (USA)!  Each App has between 50-100 downloads / day.

Any ideas?

23

Announce Your Software/Service/Product / Matched Filter (Transfer Function; Poles-Zeroes) Computer Aided Design (CAD) App

« on: July 18, 2023, 10:24 AM »

Match-n-freq™ is a (free) Pulse Shaping Filter program that finds the pole-zero locations of a transfer function, H(s), for a matched-filter design.  H(s) equals a -desired- signal (Yout) divided by a given input signal (Yin).  Both Yout and Yin are functions of frequency.  Download at https://goal-driven....ps/match-n-freq.html .

H(s) has an option to equalize its sidelobe peak amplitudes in a Bode plot; i.e., Peak i = Peak j for all i, j.

Group delay, Td, is calculated to compliment a given dataset, thus, providing a maximally flat group delay.  A search for Group Delay definition on the internet shows various results and thus leaving the question which are true?  A textbook from 1980 differs from what is seen on the internet.  They may be equivalent but not sure.  So the basic equation is Td = Partial( H(s)) with respect to 's' / s, where s = 0 + j w.  Be careful when using some other App or even my App as they try to calculate Group delay.  If the professors don't agree, how can us developers get it 'right'?  I have worked on this problem on & off since 1979 and finally think it is done!  If you find an error, PLEASE let me know

Match-n-freq™ finds an Optimal solution for a H(s) match and maximally flat group delay; a one time process!  One must determine what Poles &/or Zeros are necessary for their datasets and this may require several runs.  But with the speed of today's PCs, a half-day should have your problem solved.
---

This Matched Filter CAD App is an example of what other redundant problems can be solved using this as an example.  The source code is included in the download; search for *.fc & *.inc files plus Visual Basic code files for the front-end.
---

The reason this and other Apps were developed by me was to demonstrate the simplicity & power of a Calculus-Level language/compiler; e.g., FortranCalculus visit https://goal-driven....pps/fc-compiler.html for more; freeware too.  I taught FortranCalculus from 1975 to 1979 in the SF Silicon Valley to Engineering & Science companies.  Also taught MACSYMA at Lockheed Missiles & Space Co. for 2 years... a lost cause, FortranCalculus wins hands down.

24

Living Room / Re: OK - lets get to know each other... who are you, what do you do, where from?

« on: July 17, 2023, 04:54 PM »

Hi, I'm 78 and a Mathematical Engineer / Mathematician / Electrical Engineer / & Author living in Roseburg, OR.  I've been trying to introduce a Calculus-Level Computer language named FortranCalculus (FC) to Engineers & Scientists and their management.  FC reduces Problem-Solution cycle time by 1/20th!  FC got its start at NASA ~1960.  Ever see the movie Hidden Figures?  It kinda shows the problems Engineers have in communicating amongst themselves.

Anyone living in Roseburg, OR?  If so, please make contact

Phil

25

Post New Requests Here / Re: Need buttons to download a file and disable used button, how to do so in HTML?

« on: July 15, 2023, 05:55 PM »

No "typo"!  The amount came from how much time it saved me, not sure how much time it took you to solve my problem

Thanks again!

PS: the "button:disabled" feature was the last step in fixing all my problems with buttons.

         .button:disabled {
            background: #808080 linear-gradient(#C0C0C0, #808080);

-ProCompSys (July 11, 2023, 12:09 PM)