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| Members: 1 | Media: 14Science for the Lazy
This is a channel featuring various clips relating to science because its fun to learn when all you have to do is watch short videos. Tags: science lazy clips videos Status: Public Created: 1st July 2008 Owner: TheProcrastinator |
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If mankind were to disappear from the Earth, buildings would begin to crumble under natural stresses. Tags: Environment aftermath population zero world without us earth planet environment global warming armageddon dooms Added: 15th April 2008 Views: 82 Posted By: TheProcrastinator |
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The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory (ISBN 0-375-70811-1) is a book by Brian Greene published in 1999 which introduces string theory and provides a comprehensive though non-technical assessment of the theory and some of its shortcomings.
Beginning with a brief consideration of classical physics, which concentrates on the major conflicts in physics, Greene establishes a historical context for string theory as a necessary means of integrating the probabilistic world of the standard model of particle physics and the deterministic Newtonian physics of the macroscopic world. Greene discusses the essential problem facing modern physics: unification of Albert Einstein's theory of General Relativity and Quantum Mechanics. Greene suggests that string theory is the solution to these two conflicting approaches. Greene frequently uses analogies and thought experiments to provide a means for the layman to come to terms with the theory which has the potential to create a unified theory of physics.
The Elegant Universe was adapted for a three hour program in three parts for television broadcast in late 2003 on the PBS series NOVA. Tags: the elegant universe albert einstein relativity gravity newton physics astronomy space time brian green pbs Added: 11th April 2008 Views: 55 Posted By: TheProcrastinator |
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String theory is an incomplete mathematical approach to theoretical physics, whose building blocks are one-dimensional extended objects called strings, rather than the zero-dimensional point particles that form the basis for the standard model of particle physics. By replacing the point-like particles with strings, an apparently consistent quantum theory of gravity emerges, which has not been achievable under quantum field theory. Usually, the term string theory includes a group of related superstring theories and a few related frameworks such as M-theory, which seeks to unite them all.
String theorists have not yet completely described these theories, or determined if or how these theories relate to the physical universe. The elegance and flexibility of the approach, however, and a number of qualitative similarities with more traditional physical models, have led many physicists to suspect that such a connection is possible. In particular, string theory may be a way to "unify" the known natural forces (gravitational, electromagnetic, weak nuclear and strong nuclear) by describing them with the same set of equations, as described in the theory of everything. On the other hand, the models have been criticized for their inability, thus far, to provide any experimentally testable predictions.
Work on string theory is made difficult by the very complex mathematics involved, and the large number of forms that the theories can take depending on the arrangement of space and energy. Thus far, string theory strongly suggests the existence of ten or eleven (in M-theory) spacetime dimensions, as opposed to the usual four (three spatial and one temporal) used in relativity theory; however, the theory can describe universes with four effective (observable) spacetime dimensions by a variety of methods. The theories also appear to describe higher-dimensional objects than strings, called branes. Certain types of string theory have also been shown to be equivalent to certain types of more traditional gauge theory, and it is hoped that research in this direction will lead to new insights on quantum chromodynamics, the fundamental theory of the strong nuclear force. Tags: string theory science religion Added: 11th April 2008 Views: 39 Posted By: TheProcrastinator |
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String theory is an incomplete mathematical approach to theoretical physics, whose building blocks are one-dimensional extended objects called strings, rather than the zero-dimensional point particles that form the basis for the standard model of particle physics. By replacing the point-like particles with strings, an apparently consistent quantum theory of gravity emerges, which has not been achievable under quantum field theory. Usually, the term string theory includes a group of related superstring theories and a few related frameworks such as M-theory, which seeks to unite them all.
String theorists have not yet completely described these theories, or determined if or how these theories relate to the physical universe. The elegance and flexibility of the approach, however, and a number of qualitative similarities with more traditional physical models, have led many physicists to suspect that such a connection is possible. In particular, string theory may be a way to "unify" the known natural forces (gravitational, electromagnetic, weak nuclear and strong nuclear) by describing them with the same set of equations, as described in the theory of everything. On the other hand, the models have been criticized for their inability, thus far, to provide any experimentally testable predictions.
Work on string theory is made difficult by the very complex mathematics involved, and the large number of forms that the theories can take depending on the arrangement of space and energy. Thus far, string theory strongly suggests the existence of ten or eleven (in M-theory) spacetime dimensions, as opposed to the usual four (three spatial and one temporal) used in relativity theory; however, the theory can describe universes with four effective (observable) spacetime dimensions by a variety of methods. The theories also appear to describe higher-dimensional objects than strings, called branes. Certain types of string theory have also been shown to be equivalent to certain types of more traditional gauge theory, and it is hoped that research in this direction will lead to new insights on quantum chromodynamics, the fundamental theory of the strong nuclear force. Tags: String theory Added: 11th April 2008 Views: 42 Posted By: TheProcrastinator |
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J. Craig Venter, genome scientist and chairman of the J. Craig Venter Institute, discusses publishing the first diploid genome and his new project of creating synthetic life-forms. The Wall Street Journal's Jacob Goldstein has the interview. Tags: Craig Venter Wall Street Journal Added: 7th April 2008 Views: 15 Posted By: TheProcrastinator |
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J. Craig Venter (born John Craig Venter October 14, 1946, Salt Lake City, Utah) is an American biologist and businessman. Venter founded The Institute for Genomic Research and was instrumental in mapping the human genome. He was listed on Time Magazine's 2007 Time 100 list of the most influential people in the world. Tags: aljazeera al jazeera frost over world venter genome global warming Added: 7th April 2008 Views: 34 Posted By: TheProcrastinator |
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In keeping with the theme of TED2008, professor Stephen Hawking asks some Big Questions about our universe -- How did the universe begin? How did life begin? Are we alone? -- and discusses how we might go about answering them. Tags: Stephen Hawking Science Universe ted tedtalks Evolution math physics Added: 7th April 2008 Views: 24 Posted By: TheProcrastinator |
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Dan Dennett is a Tufts philosophy professor and cognitive scientist, renowned for his books, Consciousness Explained (1991) and Darwin's Dangerous Idea (1995). His most recent book, Breaking the Spell: Religion as a natural phenomenon calls for a rational examination of religion as a cultural phenomenon that has co-evolved over milennia to meet human needs. In this talk, which followed the presentation by Pastor Rick Warren, he takes issue with some of Warren's claims in The Purpose-Driven Life. (Recorded February 2006 in Monterey, CA. Duration: 25:29) Tags: TEDTalks Daniel Dennett cognitive scientist Added: 7th April 2008 Views: 20 Posted By: TheProcrastinator |
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Theoretical Physicist Michio Kaku on String Theory 4 Tags: michio kaku string theory Theoretical Physicist Added: 7th April 2008 Views: 17 Posted By: TheProcrastinator |
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String Theory Explained by Michio Kaku Tags: michio kaku string theory Theoretical Physicist Added: 7th April 2008 Views: 21 Posted By: TheProcrastinator |
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Michio Kaku on String Theory 2 Tags: michio kaku string theory Theoretical Physicist Added: 7th April 2008 Views: 18 Posted By: TheProcrastinator |
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Theoretical Physicist, Author, Professor Michio Kaku talks about String Theory Tags: michio kaku string theory Theoretical Physicist Added: 7th April 2008 Views: 24 Posted By: TheProcrastinator |
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