Author Archives: greg

Bob Dylan "Restless Farewell"

This song is a masterpiece. The sentimental tune, borrowed from The Parting Glass, amplifies the emotional power of the lyrics, which are pure poetry. The song is about a life lived honestly and the life beyond this life that waits.  … Continue reading

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Avoid doing it automatically

From http://milkthepigeon.com/2011/08/21/learning-any-skill-2x-as-fast-in-half-the-time-making-greatness-pt-2/ Geoffrey Colvin in his book Talent is Overrated talks about the paradox of automaticity: “Frequently, when we see great performers doing what they do, it strikes us that they’ve practiced for so long, and done it so many times, … Continue reading

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negative numbers

Reading Turnbull The Great Mathematicians.  Why did the idea of negative numbers confuse us as kids?  Because there's no such thing.   -2 is an order to subtract 2.  It's an operation.  -3 + 1 = -2 means subtracting 3 and … Continue reading

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generalized Hough

Generalized Hough is used for an arbitrary shape.  The shape is parameterized by the center point and the set of vectors leading from the boundary points to the center.  These displacement vectors are indexed by the orientation of the tangent … Continue reading

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hough transform

A Hough transform is an algorithm used in computer vision (image processing) application.  A computer image is a 2D array of values.  To identify a particular object in an image, we see if it matches a model for the object.  … Continue reading

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Meaning of Bob Dylan's "License to Kill"

It's hard to believe I'm 41 years old, count myself as a Bob Dylan fan, and have never heard this song.  Watch Mr. Dylan on David Letterman.  It's mesmerizing. So, what does it mean? Here's my interpretation:  At its base, … Continue reading

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experience quality

My blood pressure goes down when I edit text in a text editor, write equations in LaTex, store arrays in HDF5, write numerical code in numerical python,  or any time I hit a nail with a hammer. ...to truly experience … Continue reading

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Brad Osgood's Fourier Transform Course

Stanford and many other universities have made videos of class lectures available for free via youtube and other outlets (such as iTunes U). Let's pause for a moment and appreciate that. Holy crap! You mean I can learn linear algebra … Continue reading

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