DV8 2XL
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Everything posted by DV8 2XL
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Damn. Ever since I was a kid I've wanted to be abducted by space fairing aliens, but has it happened - no. Instead they go after neurotics that don't want to be. It's a cruel and unfair universe, I tell you.
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Well that is actually one of the standard interpretations
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Can causality and symmetry teach us anything about cosmology?
DV8 2XL replied to bascule's topic in Astronomy and Cosmology
On the other hand, one can make the argument that the need for a first cause is just a human conceit; we live our little linear lives with a beginning and end, thus we assume that this must be true of the cosmos. In fact there is no requirement at all for a First Cause; the universe may be cyclic, one of many, or just some cosmic accident with a causeless beginning and a dead end. Just like we have trouble conceptualizing quantum scale events with our Newtonian perspective; we may just not be able to get our minds around the concept of a causeless beginning. -
Can causality and symmetry teach us anything about cosmology?
DV8 2XL replied to bascule's topic in Astronomy and Cosmology
Basicaly you are refering to a case of 'field axioms', pick a conjecture about time at random and build a cosmology around it. You'll be in good company. -
What is your opinion of Peak Oil?
DV8 2XL replied to Kylonicus's topic in Ecology and the Environment
But for what? To save the internal combustion engine? We can do better than that. I know that as a prime mover this is a reliable and mature technology but its time has come. Finding new ways to store electricity and switching electromotive prime movers is IMHO the route to take. -
What is your opinion of Peak Oil?
DV8 2XL replied to Kylonicus's topic in Ecology and the Environment
Estimates vary from thirty-percent of arable land at the low end to eighty-percent at the high end. However as I reported in another thread: In promoting biodiesel – as the European Union, the British and US governments and thousands of environmental campaigners do – you might imagine that you are creating a market for old chip fat, or rapeseed oil, or oil from algae grown in desert ponds. In reality you are creating a market for the most destructive crop on earth. Last week, the chairman of Malaysia’s Federal Land Development Authority announced that he was about to build a new biodiesel plant(4). His was the ninth such decision in four months. Four new refineries are being built in Peninsula Malaysia, one in Sarawak and two in Rotterdam(5). Two foreign consortia – one German, one American – are setting up rival plants in Singapore(6). All of them will be making biodiesel from the same source: oil from palm trees. “The demand for biodiesel,” the Malaysian Star reports, “will come from the European Community … This fresh demand … would, at the very least, take up most of Malaysia’s crude palm oil inventories”(7). Why? Because it’s cheaper than biodiesel made from any other crop. In September, Friends of the Earth published a report about the impacts of palm oil production. “Between 1985 and 2000,” it found, “the development of oil-palm plantations was responsible for an estimated 87 per cent of deforestation in Malaysia”(8). In Sumatra and Borneo, some 4 million hectares of forest has been converted to palm farms. Now a further 6 million hectares is scheduled for clearance in Malaysia, and 16.5m in Indonesia. Almost all the remaining forest is at risk. Even the famous Tanjung Puting National Park in Kalimantan is being ripped apart by oil planters. The orang-utan is likely to become extinct in the wild. Sumatran rhinos, tigers, gibbons, tapirs, proboscis monkeys and thousands of other species could go the same way. Thousands of indigenous people have been evicted from their lands, and some 500 Indonesians have been tortured when they tried to resist(9). The forest fires which every so often smother the region in smog are mostly started by the palm growers. The entire region is being turned into a gigantic vegetable oil field. Before oil palms, which are small and scrubby, are planted, vast forest trees, containing a much greater store of carbon, must be felled and burnt. Having used up the drier lands, the plantations are now moving into the swamp forests, which grow on peat. When they’ve cut the trees, the planters drain the ground. As the peat dries it oxidises, releasing even more carbon dioxide than the trees. In terms of its impact on both the local and global environments, palm biodiesel is more destructive than crude oil from Nigeria. George Monbiot. Published in the Guardian 6th December 2005 That is only one factor -
What is your opinion of Peak Oil?
DV8 2XL replied to Kylonicus's topic in Ecology and the Environment
Props to joema, too -
Announcing WiSci, SFN's own science encyclopedia
DV8 2XL replied to Cap'n Refsmmat's topic in Forum Announcements
IP addresses are not sufficient at Wikipedia anymore. As of last week you cannot start a topic as an annon. -
Wikipedia is suffering from the tragedy of the commons. It has become a target for kooks and a soapbox for those with an agenda. Good editors that were manning the barricades are being overwhelmed and dropping out faster than they can be replaced. I will gladly input to the policy process at this new effort, but you should all know where I'm comming from.
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Announcing WiSci, SFN's own science encyclopedia
DV8 2XL replied to Cap'n Refsmmat's topic in Forum Announcements
http://en.wikipedia.org/wiki/Wikipedia:Requests_for_arbitration/Benjamin_Gatti/Evidence http://en.wikipedia.org/wiki/Wikipedia:Requests_for_arbitration/Carl_Hewitt/Evidence http://en.wikipedia.org/wiki/Wikipedia:Requests_for_arbitration/Reddi_2/Evidence Here are examples of three type of editor that policies should discourage participating in this project. They are the reasons I no longer edit at Wikipedia. The first is a single issue anti-nuke that has stated that the rules should not apply to him because of the importance of his message. The second is a prof. at M.I.T trying to use Wikipedia to give his own research more weight than it is given within the field. The third is a worshiper of Velikovsky and Tesla and fights tenaciously to insert their ideas everywhere he can. Similar will show up here, and you would best have a mechanism to deal with them swiftly and effectively or this will be overrun too. -
The process your referring to is called modulation: the superimposition of one signal upon an other. This is how sound waves may be carried great distance riding on electromagnetic waves and reconverted back in to sound at some distant place. Its technical name is - radio.
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Sound will not propagate through a vacuum. Sound is defined as mechanical vibrations propagating through a medium. No medium, no sound.
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Dividing Light by speed switching
DV8 2XL replied to YT2095's topic in Modern and Theoretical Physics
That's right. Then think of getting them all synced up! In the end you are better off using a fast optical gate. -
Dividing Light by speed switching
DV8 2XL replied to YT2095's topic in Modern and Theoretical Physics
The more you chop-up the signal the more you spread out its bandwidth. That is why fast digital signals must use broadband channels. You propose: "...if this "Switching" were to exceed the rate of visible light, could it be used to examine individual photons or clusters of them like taking a nm slice of a light beam?" Unfortunately the answer is no, because as the switching speed increases the clusters of photons will tend to spread out. This assumes I am interpreting your intentions here the way you intend, -
Dividing Light by speed switching
DV8 2XL replied to YT2095's topic in Modern and Theoretical Physics
In the end you run up against the Nyquist–Shannon sampling theorem if you attempt to do this. Ultimately the faster the sampling rate the more smeared out the resultant signal gets. -
In a neutron star it is in balance, more mass and the system collapses into a black hole.
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It's about gravity overcoming all other forces in the end.
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I don't think that anyone here will be comfortable offering medical advice. Nor should you be seeking it in a place like this.
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I don't think that anyone here will be comfortable offering medical advice. Nor should you be seeking it in a place like this.
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Ya, there is more to it. You need the right medium to grow the organisms on and the right temperature and humidity. Of course you must inoculate the plates with what ever it is you want to raise. Best to start with a Google search.
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That moldering two-thousand year old documents contain a true record of the will of the intelligence that created the universe, and that it's principles should be held even in the face of overwhelming evidence that it is wrong.
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Your rings are gone, that's why you have oil in the cylinder, if the valve wasn't seating when the engine was running, good chance the seat was burned, or warped. You have a BIG o'haul in front of you
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euclidian geometry vs. Cartesean coordinates
DV8 2XL replied to gib65's topic in Linear Algebra and Group Theory
[bitter Old Man's opinion] The decline of education in the West and the rise of faith/mysticism over logic/rationalism, began when Euclidean Geometry was removed from the General Syllabus. [/bitter Old Man's opinion] -
Weinberg and Witten consider the so-called emergent theories to be misguided. so, they came up with a no-go theorem that excludes, under very general assumptions, the hypothetical composite and emergent theories. Decades later, some condensed matter physicists are proposing theories of emergent gravity and the mainstream high-energy physicists are still using this theorem to "debunk" such theories. However because most of these emergent theories aren't Lorentz covariant, the WW theorem doesn't apply.
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euclidian geometry vs. Cartesean coordinates
DV8 2XL replied to gib65's topic in Linear Algebra and Group Theory
The Cartesian system is Euclidean Geometry with coordinates - that was the innovation - the Cartesian Coordinate System allowed the unification of algebra and geometry in one system - analytical geometry