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Videa shodující se s "Agriculture"

314 zhlédnutí
Kategorie: Dokumenty
Hodnoceno 3
WATCH PLAYLIST The Viking sword was the primary weapon of the Viking. It was a development of the Roman spatha, evolving out of the Migration Period sword in the 8th century, and into the classical knightly sword in the 11th century with the emergence of larger cross-guards. The Viking swords were pattern welded which gave the blade extra strength as the core was made of springy iron and edge of hard steel. Of particular note is the "Ulfberht" subset, which used steel of higher purity and carbon content than its peers in the region that may have been imported in ingot. Blade length varied from 71 to 84 centimetres. Early examples have single, deep, wide fullers running the full length of the blade. Later examples have multiple narrow fullers. A fuller reduces the weight of the blade without compromising its strength. This weight reduction would allow the wielder to swing faster and harder strokes. Later swords also had more tapered points for increased effectiveness against chain mail. All have short single-handed hilts with pyramid, lobed or cocked-hat style pommels. Pommels were made of iron and were heavier than on the earlier Migration Period sword.
520 zhlédnutí
Kategorie: Dokumenty
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Professor Michio Kaku, famous Theoretical Physicist and one of the inventors of Light Cone String Field Theory (one of the Relativistic forms of M-Theory), hosts a documentary on the use of computer technology, cognitive science, mathematical groupings, faster computers, sophisticated algorithms and, most importantly, better education that will will lead to "The Intelligence Revolution". Ubiquitous computing is fast approaching us, with computer technology quickly becoming present in almost every facet of society and technology. Soon computers will be so ubiquitous that they will toil away in almost pure invisibility: in our glasses, in our clothing even in our own body. The synthesis between computer fabrication, computer connectivity and of nanotechnology will mean that computers will be smaller, more connected and everywhere with minimal impact environmentally and spatially but creating a renaissance in information control by the individual. Dr. Kaku was a high achiever in his youth, to say the very least. He constructed a small-scale, but fully functional, Cyclotron Particle Accelerator in his senior years at high school. His goal was no less than to fabricate antimatter. Such ambition did not go unnoticed and got the attention of a very famous physicist, Dr. Edward Teller. Dr. Teller noticed that young Michio was a very talented young man and promptly offered him a Harvard scholarship, starting his academic career. Michio's initial education of physics and inspiration which he had to build a reasonably complicated device was triggered by his own education of the subject early in life mixed in with a bold curiosity. Michio got his knowledge through books, children today are advanced data retrievers in comparison and can scour the internet for most of the content of human knowledge. Its no wonder children and young people are making such powerful innovations and ideas. This synergy of Information Retrieval, Information Processing and Information Implementation is the engine of creativity and prosperity that, if we plan it correctly, could solve most of the problems facing us today: Global Warming, Environmental disasters, Disease, War, Hunger and Energy shortages are all problems which need quick access to information to solve and fast processing of plans to implement action. The Internet has given us one way to do this, but with more work on smart computing, cloud computing and the expanding field of Neural Networking and Grid Computing we may...
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