Doodling in Math: Spirals, Fibonacci, and Being a Plant [Part 3 of 3]

Undulatus asperatus Undulatus asperatus (or alternately, asperatus) is a cloud formation, proposed in 2009 as a separate cloud classification by the founder of the Cloud Appreciation Society. If successful it will be the first cloud formation added since cirrus intortus in 1951 to the International Cloud Atlas of the World Meteorological Organization.[2] The name translates approximately as "roughened or agitated waves".[3] History of observations[edit] Margaret LeMone, a cloud expert with the National Center for Atmospheric Research has taken photos of asperatus clouds for 30 years, and considers it a likely new cloud type.[2] On June 20, 2006 Jane Wiggins took a picture of asperatus clouds from the window of a downtown office building in Cedar Rapids, Iowa.[6] In March 2009, Chad Hedstroom took a picture of asperatus clouds from his car near Greenville Ave in Dallas, Texas. References[edit] External links[edit] Media related to Undulatus asperatus at Wikimedia Commons

The origin of the "nabla" symbol - Casting Out Nines We’re about to start working with gradient vectors in Calculus 3, and this topic uses a curious mathematical symbol: the nabla, which looks like: . This symbol has several mathematical uses, one of which is for gradients; if f is a function of two or more variables then \nabla f is its gradient. But there does not appear to be a use for the symbol outside mathematics (and mathematical physics). One of my students asked me about the origin of this symbol, and I had to confess I didn’t know. I always figured it was somehow related to the much more common capital Greek delta, \Delta , but the real story is a lot more colorful than that. The nabla is so-called because it looks like a harp; the Greek word for the Hebrew or Egyptian form of a harp is “nabla” . (The above quote is from this text file that contains a lot more on this subject.) I like that term “atled” — that’s the backwards spelling of “delta” of course.

Krabben blijken ware kunstenaars Deel op Facebook Volgende Froot Krabben blijken ware kunstenaars De Krabben uit Australië en Maleisië hebben een verbazingwekkende manier om hun huizen te bouwen. Het lijkt namelijk net kunst. Deze krabben maken hun huizen diep onder het zand en maken tijdens het uitgraven hiervan kleine zandballetjes. izismile.com Volgende froot Een vliegende grasmaaier 12 Useful Math Hacks That They Didn't Teach You In School 12 Useful Math Hacks That They Didn't Teach You In... 12 Useful Math Hacks That They Didn't Teach You In School By Virgin Radio Lebanon Life DIY L.Glee for Virgin Radio Lebanon After finding these math hacks, I'm convinced that all those years of being forced to struggle through math class really was just a torture ploy created by evil math teachers everywhere. 1. As if it was this simple all along... via reddit/u/quaxon 2. Who knew? via imgur / MoonnMan 3. Finally! via WonderHowTo 4. Also a cool party trick. via 1000lifehacks What Did You Think? L.Glee For Virgin Radio Lebanon Getting information off the Internet is like taking a drink from a fire hydrant - Mitchell Kapor More posts by L.Glee Verified Join Diply Today Connect with a social network Sign In to Diply Sign into your Diply account with your social network Report Post Select the option(s) that best described why this should be removed from Diply.

They're No. 1: U.S. Wins Math Olympiad For First Time In 21 Years Head coach Po-Shen Loh (far left) and assistant coaches John Berman and Alex Zhai (far right) flank the members of the winning squad: Shyam Narayanan, David Stoner, Michael Kural, Ryan Alweiss, Yang Liu and Allen Liu. Courtesy of Po-Shen Loh hide caption itoggle caption Courtesy of Po-Shen Loh Head coach Po-Shen Loh (far left) and assistant coaches John Berman and Alex Zhai (far right) flank the members of the winning squad: Shyam Narayanan, David Stoner, Michael Kural, Ryan Alweiss, Yang Liu and Allen Liu. Courtesy of Po-Shen Loh In one of this year's most intense international competitions, the United States has come out as best in the world — and this time, we're not talking about soccer. This week, the top-ranked math students from high schools around the country went head-to-head with competitors from more than 100 countries at the International Mathematical Olympiad in Chiang Mai, Thailand. "If you can even solve one question," Loh tells NPR's Arun Rath, "you're a bit of a genius."