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Derik Perry
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The Jastrow illusion is a size illusion where two curved shapes of identical measurements are placed next to each other. When viewing the two shapes, one looks significantly larger than the other. When the positions of the two shapes are reversed, the impression of which is the larger is also reversed.

The study of perceptual illusions like the Jastrow illusion helps scientists to investigate the various mechanisms involved in the visual perception of objects, and thus increases our understanding of how our minds function in informing us about the environment.

Know more:
http://www.michaelbach.de/ot/geom-Jastrow/index.html

Watch:
www.youtube.com/watch?v=Uf8--M3VC5Y

#neuroscience   #opticalillusion   #brainwonders  
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Carpenter bee going to work in my back yard. 
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The SR step team @ #TEDxSR 

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how I'm feeling today....
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As the company shifts its focus to later-stage companies, don't expect to see a Cinderella story come out of this year's program.
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Change is all around us, pervasive and ubiquitous. Organizations need to get better at dealing with it, and ideally, leverage both internal and external disruption for competitive advantage. Once they discard the outdated notions of present and future state, EAs can finally move forward, architecting their organizations to embrace change as a core competency.
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On a clear evening in the City of Brotherly Love, you can see the backside of William Penn. 
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It has been over four months since I was appointed the U.S. Chief Information Officer (CIO). In that time, I have come to appreciate both the
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WWII planes fly over the Nat'l Mall for V-E Day

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Take your middle school age kids to see Selma for free.  Check out http://selmastudenttickets.com/ Then talk about it #selmaforstudents  Due to the generous contributions by so many of the country’s most prominent African-American business leaders, more than 275,000 middle and high school students will experience the critically acclaimed film for free at participating theaters while supplies last.
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Have him in circles
590 people
Trovon Williams's profile photo
Oscar Gala y Hondema's profile photo
Doru Mihaescu's profile photo
kleber alejandro abel rocca gutierrez's profile photo
Virginia Online Soccer News's profile photo
Crisanto Larong's profile photo
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My friends call me D, my close friends & family call me something else.
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Here is the first post college job for a Jewel of the Alpha Phi Alpha Fraternity, Inc. (Jewel Nathanial Allison Murray circa ~1910)
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Here lies the final resting place of an Alpha Phi Alpha Fraternity, Inc. Jewel Robert Harold Ogle
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My favorite place for a great weekend brunch and lively music.
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The Volt Service team led by Wayne Prince is an exceptional group. These guys know how to take care of my Volt and are great at accommodating my busy schedule. Wayne is great at telling me what needs to get done on the car and in what sequence. Its the best service I've had in ownership over any of the Honda's, Toyota's or Cadillac I've owned. Keep up the great work. Derik
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This is the place where Alpha Phi Alpha Fraternity Incorproated does its work in the Montgomery County community. Affectionately known as the the Alpha House, its formally the Smithville School Education Center and Museum.
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