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Messages - tanvir28

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EEE / The beginning of Internet : Reason behind(p-1)
« on: March 05, 2015, 09:59:32 AM »
Unlike technologies such as the light bulb or the telephone, the Internet has no single “inventor.” Instead, it has evolved over time. The Internet got its start in the United States more than 50 years ago as a government weapon in the Cold War. For years, scientists and researchers used it to communicate and share data with one another. Today, we use the Internet for almost everything, and for many people it would be impossible to imagine life without it.


On October 4, 1957, the Soviet Union launched the world’s first manmade satellite into orbit. The satellite, known as Sputnik, did not do much: It tumbled aimlessly around in outer space, sending blips and bleeps from its radio transmitters as it circled the Earth. Still, to many Americans, the beach-ball-sized Sputnik was proof of something alarming: While the brightest scientists and engineers in the United States had been designing bigger cars and better television sets, it seemed, the Soviets had been focusing on less frivolous things—and they were going to win the Cold War because of it.

EEE / The ancient Library of Alexandria (p-2)
« on: March 05, 2015, 09:56:41 AM »
The library is famous for having been burned, resulting in the loss of many scrolls and books, and has become a symbol of the destruction of cultural knowledge. A few sources differ on who is responsible for the destruction and when it occurred. Although there is a mythology of the burning of the Library at Alexandria, the library may have suffered several fires or acts of destruction over many years. Possible occasions for the partial or complete destruction of the Library of Alexandria include a fire set by Julius Caesar in 48 BC, an attack by Aurelian in the AD 270s, and the decree of Coptic Pope Theophilus in AD 391.
After the main library was fully destroyed, ancient scholars used a "daughter library" in a temple known as the Serapeum, located in another part of the city. According to Socrates of Constantinople, Coptic Pope Theophilus destroyed the Serapeum in AD 391.
(source: wiki)

EEE / The ancient Library of Alexandria (p-1)
« on: March 05, 2015, 09:55:52 AM »
The Royal Library of Alexandria, or Ancient Library of Alexandria, in Alexandria, Egypt, was one of the largest and most significant libraries of the ancient world. It was dedicated to the Muses, the nine goddesses of the arts.[1] It flourished under the patronage of the Ptolemaic dynasty and functioned as a major center of scholarship from its construction in the 3rd century BC until the Roman conquest of Egypt in 30 BC. With collections of works, lecture halls, meeting rooms, and gardens, the library was part of a larger research institution called the Museum of Alexandria, where many of the most famous thinkers of the ancient world studied.
The library was created by Ptolemy I Soter, who was a Macedonian general and the successor of Alexander the Great.[2] Most of the books were kept as papyrus scrolls, and though it is unknown how many such scrolls were housed at any given time, their combined value was incalculable.
(source: wiki)

EEE / Re: The Making of Titanic
« on: March 05, 2015, 09:52:49 AM »

EEE / Re: Olympic class ocean liners
« on: March 05, 2015, 09:52:26 AM »

EEE / Re: Invention of the Electric Battery
« on: March 05, 2015, 09:52:02 AM »

EEE / Re: Unshielded Twisted Pair (UTP) Cable
« on: March 05, 2015, 09:51:40 AM »

Textile Engineering / Re: Intelligent textiles -(part2)
« on: March 05, 2015, 09:48:57 AM »

Textile Engineering / Re: Hydrolysis of Reactive Dye
« on: March 05, 2015, 09:46:57 AM »

Textile Engineering / Re: laser printing technology
« on: March 05, 2015, 09:46:15 AM »

Other recent research takes a more holistic view.
"The ninth-century collapse and abandonment of the Central Maya Lowlands in the Yucatán peninsular region were the result of complex human–environment interactions," writes this team in a study published Monday (Aug 20) in the journal Proceedings of the National Academy of Sciences.
The team, led by B.L. Turner, a social scientist at Arizona State University, concurs that by clearing the forest, the Mayans may have aggravated a natural drought, which spiked about the time the empire came to an end and population declined dramatically.
But this is just one contributing factor to their demise, Turner and colleagues write, pointing out that the reconfiguration of the landscape may also have led to soil degradation. Other archaeological evidence points to a landscape under stress, for instance, the wood of the sapodilla tree, favored as construction beams, was no longer used at theTikal and Calakmul sites beginning in A.D. 741. Larger mammals, such as white-tailed deer, appear to have declined at the end of empire.
Social and economic dynamics also contributed. Trade routes shifted from land transit across the Yucatán Peninsula to sea-born ships. This change may have weakened the city states, which were contending with environmental changes. Faced with mounting challenges, the ruling elites, a very small portion of the population, were no longer capable of delivering what was expected of them, and conflict increased.

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