Monthly Archives: December 2011

OpenCL Demo

OpenCL is a standards-based programming language that allows the CPU and GPU to work together for faster and more efficient processing. OpenCL gives any application access to the graphics processing unit for non-graphical computing. Thus, OpenCL extends the power of the Graphics Processing Unit beyond graphics.

Check out this demo comparing OpenCL to C and a multi-threaded program.

Larry Battle

I love to program, and discover new tech. Check out my stackoverflow and github accounts.

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Subscription Review: New Scientist


Throughout 2011 I have been loyal subscription holder to the scientific magazine New Scientist.
I love it how each week I’m presented with the latest scientific discoveries that blow my mind.

So, what is New Scientist?

New Scientist reports on the very latest science and technology news, putting discoveries and advances in the context of everyday life. New Scientist relates the advancements of human knowledge to the broader impacts on society and culture, making it essential reading for people who ask why. – From: Amazon.com

Here are my top 5 hottest stories from 2011

  1. Fallible DNA evidence can mean prison or freedom

    New Scientist reveals that much of the DNA analysis now conducted in crime labs can suffer from worrying subjectivity and bias.

  2. Neutrino watch: Speed claim baffles CERN theoryfest

    OPERA … announced that neutrinos traveling from CERN had apparently moved faster than light.

  3. Move over, Einstein: Machines will take it from here

    Schmidt recorded this movement using a motion tracking camera which fed numbers into his computer. What he was looking for was an equation describing the motion of the pendulums.

    Note: I wrote an article over this here

  4. How online games are solving uncomputable problems
  5. Better than human? What’s next for Jeopardy! computer

Pros:

  • Well thought out and highly organized magazine.
  • Scientific Job Board
  • Amazing Scientific News
  • Articles are easy for ordinary person to understand.
  • Offers short lessons over complex topics
  • “The Last Word” – answers to scientific questions about everyday phenomena.

Cons:

  • Topics can sometimes become repetitive
  • No references for most articles.
  • It’s only news, so you can’t apply want you learn.

Price: ~$99 annually (on line discounts may vary)
You can check out “New Scientist” at www.newscientist.com/

Larry Battle

I love to program, and discover new tech. Check out my stackoverflow and github accounts.

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10 Minute Tutorial over Logarithms with a Mix of Javascript


Summary:
This tutorial will provide a simple overview of logarithms.

What are Logarithms?
Logarithms are used to determine the exponent needed to receive a certain value with a particular base.

Example: Log 100 = 2. Since 10^2 = 100.

Here’s a short video explaining logarithms more in-depth with a practical example.

The most common bases used for logarithms are base 10 and E. With base E logarithms normally referred to as the natural logarithm.
In Javascript, the function Math.log returns the natural logarithm of the argument instead of a base 10 logarithm. This can cause some confusion for those unaware of this fact.

Math.log( 100 ) == 2 // returns false
Math.log( 100 ) // returns 4.605170185988092

So how can one use a different base other than E? Well, it simple. All you have to do is take the log of the value that you want, then divide that by the log of the desired based.
Like so.

Math.log( x ) / Math.log( desiredBase );

Here’s a user defined function that does the same operation.

/**
* @function Math.logx
* @purpose: To provide the logarithm for any base desired. Default base is 10.
* @returns a number.
*/
Math.logx = function(x,base) {
    return (Math.log(x)) / (Math.log(base | 10 ));
}

And now, we can calculate log 10 as 2 instead of another number.

Math.log( 100 ) == 2    // returns false
Math.logx( 100 ) == 2   // returns true

Larry Battle

I love to program, and discover new tech. Check out my stackoverflow and github accounts.

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Video Resume – Elevator Pitch

Here’s my video resume.

Do you have any tips for me?

Larry Battle

I love to program, and discover new tech. Check out my stackoverflow and github accounts.

More Posts - Website

Follow Me:
Twitter