The Golden Ratio in Flowers The Golden Ratio in Flowers Posted by ksakz on June 4, 2012 · 8 Comments Leonardo Fibonacci discovered an amazing sequence of numbers that ties nature and mathematics together in fascinating ways. This ratio is thought to exist in nature because its particular growth pattern is the most effective. Adolf Zeisig, a mathematician and philosopher, found the golden ratio in plant stems, veins of leaves, skeletons of animals, chemical compounds and the geometry of crystals. The Fibonacci sequence starts with 1, and each additional number is the sum of the two numbers immediately before it (1+0=1, 1+1=2, 2+1=3, 3+2=5, 5+3=8, 13, 21,34, 89, etc). Check out some more instances of the Golden Ratio in flowers below! Like this: Like Loading...
BRAINMETA.COM - NEUROSCIENCE, CONSCIOUSNESS, BRAIN, MIND, MIND-BRAIN, NEUROINFORMATICS, BRAIN MAPS, BRAIN ATLASES Western Philosophy The 20 most-watched TED Talks to date TEDTalks The 20 most-watched TEDTalks (so far) Today, on the fifth birthday of TEDTalks video, we’re releasing a new list of the 20 most-watched TEDTalks over the past five years — as watched on all the platforms we track: TED.com, YouTube, iTunes, embed and download, Hulu and more … What a great, mixed-up group this is! Playlist The 20 most popular TED Talks, as of December 2013 UPDATED: To see all these talks at one click, check out our updated Playlist: The 20 Most Popular Talks of All Time. Table of contents (With last update date) Cover Foreword (August 13, 2009) Part 1. Preface to part 1 (April 12, 2000) Chapter 1. 1.1. 1.6. 1.7. Chapter 2. 2.1. 2.2. 2.3. 2.4. 2.5. 2.6. Chapter 3. 3.1. 3.2. 3.3. 3.4. Chapter 4. 4.1. 4.2. 4.3. 4.4. Chapter 5. 5.1. 5.2. 5.3. 5.4. 5.5. 5.6. 5.7. 5.8. 5.9. 5.10. 5.11. 5.12. 5.13. 5.14. 5.15. 5.16. Chapter 6. 6.1. 6.2. 6.3. 6.4. 6.5. 6.6. 6.7. 6.8. 6.9. 6.10. 6.12. Part 2. Preface to part 2 (October 17, 2010) Chapter 7. 7.1. 7.2. 7.3. 7.4. 7.5. 7.6. 7.7. 7.9. 7.10. Chapter 8. 8.1. 8.2. Chapter 9. 9.1. 9.2. 9.3. 9.4. 9.6. Chapter 10. 10.1. 10.2. 10.3. 10.4. Chapter 11. 11.1. 11.2. 11.3. 11.4. 11.5. 11.6. 11.7.The victim/victimizer polar pair 11.8. 11.9. 11.10. Chapter 12. 12.1. 12.2. 12.3. 12.5. 12.6. 12.7. Chapter 13. 13.1. 13.2. 13.3. 13.4. 13.5. 13.6. 13.7. 13.8. 13.9. 13.10. 13.11. 13.12. 13.13. Chapter 14. 14.1. 14.2. 14.3. 14.4. 14.5. 14.6. 14.7. 14.8. Chapter 15. Chapter 16. 16.3. 16.4. 16.5. Part 3. Preface to part 3 (November 18, 2009) Chapter 17. 17.1.
Three New Planets and a Mystery Object Discovered Outside Our Solar System Click on image for high-resolution file. Three planets -- each orbiting its own giant, dying star -- have been discovered by an international research team led by Alex Wolszczan, an Evan Pugh Professor of Astronomy and Astrophysics at Penn State, using the Hobby-Eberly Telescope. Penn State is a major partner in the design, construciton, and operation of this telescope, which is one of the largest in the world. 26 October 2011 — Three planets -- each orbiting its own giant, dying star -- have been discovered by an international research team led by a Penn State University astronomer. The three newly-discovered planetary systems are more evolved than our own solar system. The three dying stars and their accompanying planets have been particularly useful to the research team because they have helped to illuminate such ongoing mysteries as how dying stars behave depending on their metallicity. [ Katrina Voss ]
1920's Automobiles The rapidly growing automobile industry led by Henry Ford and the Ford Motor Company produced new and better models every year to supply the insatiable public demand. Increased wages and lower cost vehicles made possible through mass production meant that cars became increasingly affordable, although 3 out of 4 cars were bought on installment plans. Roads that had been designed for horse transport began to deteriorate under the steadily increasing load of traffic. In 1906 local governments supplied 96 per cent. of the road funding. In 1927 the State governments supplied about 37 per cent., the Federal Government 10 per cent., and the local governments 53 per cent. The funding problem for building and maintaining roads suitable for motor cars was largely solved by the introduction of a tax on gas. The car enabled people to travel much further afield than foot or horse had permitted. Car advertisements became more sophisticated as psychology was employed by copywriters. Vintage Car Clubs
Peak Everything -- Why Everything Costs More Peak Oil -- No Longer the Right Question A Shell Oil geologist named M. King Hubbert predicted in 1956 that U.S. oil production would peak in the early 1970s. When it did, Hubbert became the geologist equivalent of a rock star and gave the young environmental movement evidence for something it was seeking: a limit to growth. When is -- or was -- peak world oil production? The iconic Peak Oil example has inspired parlor-game questions about other resources. Peak Uranium -- Nuclear Risk Declines Post-Fukushima "Peak uranium" entered the lexicon with peak oil, coal and natural gas in 1956, when Shell Oil geologist Hubbert sketched out his famous resource bell curves. The world reached a uranium production peak in the 1980s, even as consumption climbed. The Fukushima Daiichi disaster in Japan last year scaled back global nuclear ambition dramatically and raised questions about nuclear power's future. Peak Population -- Driving the Race for Materials International quotas are ignored each year.
DNA seen through the eyes of a coder DNA seen through the eyes of a coder or If you are a hammer, everything looks like a nail This is just some rambling by a computer programmer about DNA. I'm not a molecular geneticist. If you spot the inevitable mistakes, please mail me (bert hubert) at ahu@ds9a.nl. I'm not trying to force my view unto the DNA - each observation here is quite 'uncramped'. Quick links: The source code, Position Independent Code, Conditional compilation, Epigenetics, Dead code, bloat, comments ('junk dna'), fork() and fork bombs ('tumors'), Mirroring, failover, Cluttered APIs, dependency hell, Viruses, worms, Central Dogma, Binary patching aka 'Gene therapy', Bug Regression, Reed-Solomon codes: 'Forward Error Correction', Holy Code, Framing errors: start and stop bits, Massive multiprocessing: each cell is a universe, Self hosting & bootstrapping, The Makefile, Further reading. Updates 24th of February 2013: Added a bit on epigenetics, updated the font, small updates here and there. The source code Is here.
Arms and Armor—Common Misconceptions and Frequently Asked Questions | Thematic Essay Parrying dagger (pugnale bolognese), ca. 1550–75 Italian Partly gilt steel, brass, and wood; Wt. 15 oz. (425 g) Gift of Jean Jacques Reubell, in memory of his mother, Julia C. Coster, and of his wife, Adeline E. Post, both of New York City, 1926 (26.145.94) The field of arms and armor is beset with romantic legends, gory myths, and widely held misconceptions. Perhaps the most infamous example is the notion that "knights had to be hoisted into their saddles with a crane," which is as absurd as it is persistent even among many historians. The following text will attempt to correct some of the most popular misconceptions, and to answer some of the questions most frequently asked by the public during guided tours of the Museum's arms and armor galleries. Misconceptions and Related Questions Relating Armor Misconceptions and Related Questions Relating Edged Weapons 1. Second, it is wrong to assume that every nobleman was a knight. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Lincoln and the Civil War | Connections | The Metropolitan Museum of Art Harold Holzer1280852 Abraham Lincoln | 1863, printed 1901 | Alexander Gardner (American) | Gelatin silver print | Warner Communications Inc. Purchase Fund, 1976 (1976.627.1)8561024 Abraham Lincoln | 1863, printed 1901 | Alexander Gardner (American) | Gelatin silver print | Warner Communications Inc. Purchase Fund, 1976 (1976.627.1)1126820 Life Mask of Abraham Lincoln | 1860, cast 1886 | Leonard Wells Volk (American) and Augustus Saint-Gaudens (American) | Bronze | Purchase, Jonathan L. Cohen and Allison B. Morrow Gift and Friends of the American Wing Fund, 2007 (2007.185.2)8761024 Life Mask of Abraham Lincoln | 1860, cast 1886 | Leonard Wells Volk (American) and Augustus Saint-Gaudens (American) | Bronze | Purchase, Jonathan L. Harold Holzer1280852 I'm Harold Holzer, I'm the Senior Vice President for External Affairs at the Met, and I also write books about Abraham Lincoln and the Civil War.
Psychologists chase down sleep demons UNIVERSITY PARK, Pa. -- What do Moby Dick, the Salem witch trials and alien abductions all have in common? They all circle back to sleep paralysis. Less than 8 percent of the general population experiences sleep paralysis, but it is more frequent in two groups -- students and psychiatric patients -- according to a new study by psychologists at Penn State and the University of Pennsylvania. Sleep paralysis is defined as "a discrete period of time during which voluntary muscle movement is inhibited, yet ocular and respiratory movements are intact," the researchers state in the current issue of Sleep Medicine Reviews. Hallucinations may also be present in these transitions to or from sleep. Alien abductions and incubi and succubi, as well as other demons that attack while people are asleep, are implicated as different cultural interpretations of sleep paralysis. Brian A. He looked at a total of 35 published studies from the past 50 years to find lifetime sleep paralysis rates.