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Deborah Harrison
The best revenge is massive success.
The best revenge is massive success.

Deborah's posts

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The animation is perfect!
The Science Behind the Art of Frozen

What makes animated films beautiful? Depending on the film, it could be stylistic approach, the storyline, or, as in the case of films like Frozen, the science. 

Close to the release date of Frozen, Disney Animation Studios released a hint of the science used for the film. The beautiful snow is based on a material point method algorithm. To summarize: a particle has position, velocity, and deformation. The algorithm gives the particle mass, velocity, and volume as needed modified by collision response until you have an updated particle position. When you model each particle, you have impressive, realistic snow. When you tweak the various parameters such as snow strength, you can any type of snow possible, but you should know what parameters to use: density, hardening, and elasticity being some of the main ones if not accounting for temperature.

That’s just for the snow, but what about light? The angles, the material, the reflection or refraction, absorption, and even the movement of light through various transparencies such as sections of skin all must be considered. The Rendering Equation is one solution for computing images by simulation of the physical behavior of light; however, it does require knowledge of accurate geometry, materials, and lights. If certain parameters aren’t known or not met, the realism of a film suffers.

How much it matters depends on the studio and the film. The brilliance of Frozen was to be captured on a number of aspects from the music to the storyline to the visuals. The amount of work, time, and effort to achieve such a visual is rarely scrutinized, but perhaps next time you see an animated film and noticed how realistic the snow is, or how beautiful the ice reflects even the magical source of light, you’ll start to wonder how they actually achieved it.

Sources and Further Reading

Disney Snow Demonstration [Smithsonian Blog]

Young's Modulus Snow [Google Books Preview] 

Rendering Equation [Central European Seminar on Computer Graphics (website)] [Dartmouth (pdf)]

Origin of Image [Let It Go Sequence (YouTube)]

For #ScienceSunday  (+ScienceSunday; +Allison Sekuler, +Aubrey Francisco, +Buddhini Samarasinghe+Chad Haney, +Rajini Rao+Robby Bowles, and me) although there is #ScienceEveryday !
Animated Photo

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Be safe on the road

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TEEN WITH BAY AREA TIES CHARGED WITH BOMB MAKING IN PA: A Russian teen and Penn State student has been charged with building a suspected bomb in his bedroom. The 19-year-old teen, who graduated from Carlmont High School in Belmont in 2013, was charged with possessing a weapon of mass destruction, risking a catastrophe, and other counts. He lived in San Carlos.
Here's what we know:

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In this day and age it is vital to know how to keep your #server #safe.Learn how ,here:

#stressmanagement Please READ and SHARE!

A psychologist walked around a room while teaching stress management to an audience. As she raised a glass of water, everyone expected they’d be asked the “half empty or half full” question.

Instead, with a smile on her face she inquired, “How heavy is this glass of water?”

The answers called out ranged from 8oz to 20 oz. She replied,

“The absolute weight doesn’t matter. It depends on how long I hold it. If i hold it for a minute, its not a problem. If i hold it for an hour, i’ll have an ache in my arm. If i hold it for a day, my arm will feel numb and paralyzed. In each case, the weight of the glass doesn’t change, but the longer i hold it, the heavier it becomes.”
She continued, “The stress and worries in life are like that glass of water. Think about them for a while and nothing happens. Think about them for a big longer and they begin to hurt. And if you think about them all day long, you will feel paralyzed - incapable of doing anything.”

Always remember to put the glass down.

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Back to the days,
November has come and gone! As we welcome the last month of 2013, make sure to check out our most popular post of November. "The difference between student-directed and teacher-directed learning:"

Thanks +TeachThought for the image. #MostPopular

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Interesting though
Compute Engine is now generally available! Run high-performance virtual machines in Google data centers. We're offering expanded operating system support, no downtime with live migration, cheaper pricing, and a whole lot more:

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RIP #PaulWalker  
The latest on the death of Paul Walker:

The Los Angeles County Sheriff's Department said speed was a factor in Saturday's one-car crash, though it will take time to determine how fast the car was going.

More on the investigation at

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So true!
To be happy doesn’t mean you don’t desire more, it simply means you’re thankful for what you have and patient for what’s yet to come. Sometimes it’s easy to get so caught up in trying to accomplish something big, that you fail to notice the little things that give life its magic. So appreciate today for all it’s worth. Today is one of the good old days you’re going to miss in the years ahead. - via:

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Just 30 extra minutes of walking could really accelerate weight loss--here's how:
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