As of 9th of Oct 2009

http://www.mapleprimes.com/mapleranking?sort=desc&order=Points
 

Here is a strange behavior. I can understand that an integer and its float could be considered different, but the behavior should be the same in or out of a list. In addition it should not depend on the number of trailing zeros. In addition it should not depend on whether the integer is zero or not.

I just want to reiterate how dynamic programming problems can be solved in Maple.

Especially dynamic programming models that frequently appears in economic models.

First of all it is important to note that is close to impossible to find an easy to understand

and step-by-step road maps to dynamic programming. Why is that ?!  The below Maple

code was basically "discovered" by trial and error and pure stubbornness (caveman 101).

 

For the past few weeks I have not been receiving any of the auto-generated e-mails notifying me that someone has responded to a forum, blog, ... that I have contributed to. I checked my settings in MaplePrimes, and this feature is still active for my account. I've not found these messages in my junk folder.

Is it just me, or are others not receiving these e-mails as well?

Doug

Another example of the FromMma conversion, from a recent forum post,

In the previous post, I described why parallel programming is hard. Now I am going to start describing techniques for writing parallel code that works correctly.

First some definitions.

• thread safe: code that works correctly even when called in parallel.
• critical section: an area of code that will not work correctly if run in parallel.
• shared: a resource that can be accessed by more than one thread.
• mutex: a programming tool that controls access to a section of code

HI there, I have a quick question and I just want to confirm what I found. I was trying to do some Fourier Transform using the MTM package and I was successful in doing so for one dimensional problems when it's only f(x) but when I tried to do something more complicate like 2D fourier transform when the f is a function of x and y ie. f(x,y), Maple seems not able to do it. I checked with help menu and it seems it can support only 1D. is there anything other package that I'm not aware of that is capable of a such thing?

Green is definitely the color of the 21^st century. Recently, I was attending the annual conference of the Society of Instrumentation and Control Engineers. The keynote was delivered by Dr. Tariq Samad of Honeywell and the President of the IEEE Control Systems Society.  The talk was on various dimensions in advanced control – past, present, and future, and in particular Dr. Samad summarized some fascinating work being done in the natural resources industry on advanced control.  Through his very interesting and engaging talk, my generally conservative brain went into green mode.

Dr. Samad gave a couple of examples of massive engineering undertakings that deployed highly sophisticated control strategies at unprecedented levels of innovation and complexity. The Olympic Dam mining operation in Australia is the largest PC-based deployment of digital control techniques in history, with over 500,000 I/O points. There are major applications of model-predictive control (control strategies where the controller has inherent knowledge of plant dynamics) in traditional coal power plants that will immediately reduce the harm from these plants and set the stage for the introduction to alternate power generation.

Who has some insight on this, apparent bug in MultiSeries... The sqrt(2) answer is correct, not the 2.

Here is some statistics from the Cybernet Systems press release.

Overview of Maple

CEO - C. James Cooper
Number of employees - 122
Capital - 2.75 million dollars
Main shareholders - Keith O. Geddes (22%), C. James Cooper (19.8%)

Business results of past 3 years (in US dollars)

When exporting a maple page to PDF there's no way to tell where Maple will split the pages (where text ends on one page and begins on another).  Be nice to have a 'view split pages' options or something.

We are considering using Flash for a major part of the new version of MaplePrimes, and would like to know if you have Flash in your browser. Please vote in the new poll.

This morning, Jim Cooper added a blog post detailing what it was like selling Maplesoft to Cybernet.  It's an interesting and revealing post... enjoy!

http://www.maplesoft.com/blog/view.aspx?sid=33910

In my previous post, I tried to convince you that going parallel is necessary for high performance applications. In this post, I am going to show what makes parallel programming different, and why that makes it harder.

Here are some definitions used in this post:

• process: the operating system level representation of a running executable. Each process has memory that is protected from other processes.
• thread: within a single process each thread represents an independent, concurrent path of execution. Threads within a process share memory.

We think of a function as a series of discrete steps. Lets say a function f, is composed of steps f1, f2, f3... e.g.

Selling a company is emotionally wrenching. It was even more intensive for us at Maplesoft since we had a large number of founders who had been actively involved with the company for 20+ years. The decision for founders to sell a company so that it can move to the next stage is truly massive.

We had the luxury of a number of suitors with essentially equivalent initial financial offers, but this also destined us for a long process with lots of discussion and many twists and detours along the way. I remember the saying: that which does not kill you makes you stronger ;-). This was also my 2nd time going through the full process and maybe I can offer some advice to novices, noting the old saying that free advice is not always worth the price.