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Deep math of the folded pizza slice

By Ben on Tue Sep 9 2014 |
Deep math of the folded pizza slice
Gear | Other
Why does a flat pizza slice flop over unless you bend it into a curve? Thank Gaussian curvature, the 19th century mathematical principle that underpins everything from corrugated cardboard to eggshells to Pringles chips.
 Wired's Aatish Bhatia uses the pizza-slice as a jumping-off point to explain one of the most elegant and fascinating parts of geometry, and once you read his work, you'll never be able to look at a curved surface again:
"Well, the pizza slice was flat before you picked it up (in math speak, it has zero Gaussian curvature). Gauss’s remarkable theorem assures us that one direction of the slice must always remain flat — no matter how you bend it, the pizza must retain a trace of its original flatness. When the slice flops over, the flat direction (shown in red below) is pointed sideways, which isn’t helpful for eating it. But by folding the pizza slice sideways, you’re forcing it to become flat in the other direction – the one that points towards your mouth. Theorema egregium, indeed.
By curving a sheet in one direction, you force it to become stiff in the other direction. Once you recognize this idea, you start seeing it everywhere. Look closely at a blade of grass. It’s often folded along its central vein, which adds stiffness and prevents it from flopping over. Engineers frequently use curvature to add strength to structures. In the Zarzuela race track in Madrid, the Spanish structural engineer Eduardo Torroja designed an innovative concrete roof that stretches out from the stadium, covering a large area while remaining just a few inches thick. It’s the pizza trick in disguise
." [ link ]
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Sleepy cat hugs a doll

By Ben on Tue Sep 9 2014 |
Gear | Pet
Cute!
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Timelapse-Making Of a Bookshelf

By Ben on Tue Sep 9 2014 |
Gear | Video
"This is the fully animated story of making four bookcases. The four cases are made from two pieces of walnut veneer plywood with almost no waste. The base for the cases is made from solid walnut with mitered corners The bookcases are 33 inches tall and 47 inches wide. The finish is wipe on polyurethane. They fit under and within the spacing of the windows in the living room.
 I shot approximately 11,700 frames for this animation and used roughly 6,400 of them. I worked on this project intermittently from the 5th of January to 1st of March, 2014."
Source
  

TiVo Unveils Mega, The Largest DVR It’s Ever Sold

By Ben on Tue Sep 9 2014 |
TiVo Unveils Mega The Largest DVR It  s Ever
Gear | Gadget
TiVo is now offering the TiVo Mega to customers: a giant 24TB  RAID 5 hard drive system that can fit up to 26,000 hours of content (4,000 hours in HD). Other features include six tuners for recording multiple shows at once, built-in streaming to your phone or tablet, both at home and over the Internet, universal search across cable, VOD, and web apps like Netflix and YouTube, multi-room, whole-home support, and a slide-out keyboard remote to make those searches a breeze. The TiVo Mega is expected to be available in Q1 2015 for about $5,000.
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Canyon Urban Bike

By Ben on Tue Sep 9 2014 |
Canyon Urban Bike
Gear | Bike
The cockpit is fully integrated into a single unit and the front and rear lights are also embedded into the frame, giving Urban Concept Bike a highly distinctive, yet elegant appearance. The  Canyon Urban features  including a Gates sprocket and belt, Shimano brakes and rear derailleur, and San Marco custom leather grips and saddle .
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Teens React To Nintendo (Nes)

By Ben on Tue Sep 9 2014 |
Gear | Video
The Teens react to the classic Nintendo console, NES!
Source
  

Gif: View

By Ben on Tue Sep 9 2014 |
Gif View
Gear | Pic
waterfall
Source
  

iPrank Cracked Screen Stickers

By Ben on Tue Sep 9 2014 |
iPrank Cracked Screen Stickers

iPrank Cracked Screen Stickers
Gear | Apple
One way to get someone's attention, I suppose....  
$10.
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Hair: Expectations vs. Reality

By Ben on Tue Sep 9 2014 |
Hair Expectations vs Reality

Hair Expectations vs Reality

Hair Expectations vs Reality
Gear | Pic
"my hair and i have a very complicated relationship" by fara tit.
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Zagato reveals custom Aston Martin Virage Shooting Brake

By Ben on Tue Sep 9 2014 |
Zagato reveals custom Aston Martin Virage Shooting
Car | SportsCars
Beginning with the 1960 DB4 GT, the collaboration between Aston Martin and Italian design studio Zagato has produced a beautiful shooting brake that comes right on time for the company's 95th anniversary.
The Aston Martin Virage Shooting Brake Zagato was unveiled at Chantilly Arts & Elegance Concours d’Elegance in France, and is based on the short-lived Virage. The Virage Shooting Brake Zagato is understood to carry over its original Aston Martin underpinnings, including the 490bhp V12 6.0-litre engine and rear-wheel drive layout.
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Lightweight Exoskeleton Lets You Run 10% Easier

By Ben on Mon Sep 8 2014 |
Lightweight Exoskeleton Lets You Run 10 Easier
Gear | Tech


Jason Kerestes is a graduate student at Arizona State University. With support from DARPA, he has developed the AirLegs exoskeleton. It's a small machine worn on the back that decreases the metabolic cost of walking and running by about 10% versus not wearing the machine.
"This device was tested at the Army Research Laboratories in September 2013 and demonstrated a 10% reduction in metabolic cost (compared to no device) for users running at high speeds. It is the only device known to the US Army to oficially augment the human running gait cycle."
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