26 AUG 2024 by ideonexus
The Success of Spaceguard
For years, many scientists warned of the dangers that asteroids pose to life on Earth, but for many years they weren’t listened to. Even after it was first proposed, in 1980, that the dinosaurs were killed off by a huge asteroid striking the Yucatán Peninsula in Mexico,1 there was, in the words of leading astronomer Clark R. Chapman, a “giggle factor” associated with the risk from asteroids.2
This all changed in 1994 when comet Shoemaker-Levy 9 thudded into the side of Jupiter with th...26 AUG 2024 by ideonexus
Plasticity and Lock-In/Entrenchment of Values
Entrenchment of values creates multiple equilibria because there is a significant element of chance in which value system becomes most powerful at a particular place and time, and because, once a value system has become sufficiently powerful, it can stay that way by suppressing the competition. Moreover, the theory of cultural evolution helps to explain why the predominant cultures in society tend to entrench themselves. Simply: those cultures that do not entrench themselves in this way are, ...Folksonomies: cultural change values
Folksonomies: cultural change values
25 JAN 2024 by ideonexus
Neutralization and Homogenization
The simultaneity of two events in the month of July 1975 illustrated this in a striking manner: the linkup in space of the two American and Soviet supersatellites, apotheosis of peaceful coexistence - the suppression by the Chinese of ideogrammatic writing and conversion to the Roman alphabet. The latter signifies the "orbital" instantiation of an abstract and modelized system of signs, into whose orbit all the once unique forms of style and writing will be reabsorbed. The satellization of la...25 JAN 2024 by ideonexus
Computers are Associated with Precision, but Really They ...
In physics, too, where computers were used to relieve the tedium of data collection and plotting, relatively mundane applications had significant effects. When calculation was automated and its results instantaneously translated into screen visualizations, patterns in data became more apparent. Physics students described feeling “closer to science†and “closer to theory†when their laboratory classes began to use software for visualization and analysis. As in chemistry...Folksonomies: simulation computation
Folksonomies: simulation computation
23 DEC 2023 by ideonexus
Anthropocene Traps
The concept of evolutionary traps has been used almost exclusively for studying how non-human species respond to cues in anthropogenic environments [24–34]. Key examples include artificial human lights attracting insects, island species responding naively to the presence of introduced predators, and seabirds not being able to discriminate between the cues of marine plankton and marine plastics [34–36] (figure 1a). In the context of humans, evolutionary mismatch is a much more fr...Folksonomies: evolution maladaptation
Folksonomies: evolution maladaptation
17 OCT 2021 by ideonexus
Understanding Cause and Effect is Based on Experience
Were a man, such as Adam, created in the full vigor of understanding, without experience, he would never be able to infer motion in the second ball from the motion and impulse of the first. It is not anything that reason sees in the cause, which make us infer the effect. Such an inference, were it possible, would amount to a demonstration, as being founded merely on the comparison of ideas. But no inference from cause to effect amounts to a demonstration, as being founded merely on the compar...Folksonomies: philosophy empiricism
Folksonomies: philosophy empiricism
Adam would not know that one billiard ball hitting another would cause a chain reaction.
28 FEB 2021 by ideonexus
Humanity is Fortunate to Have a Variety of Energy Sources...
Humanity is fortunate in having such a variety of energy resources at its disposal. In the very long run we shall need energy that is unpolluting; we shall have sunlight. In the fairly long run we shall need energy that is inexhaustible and moderately clean; we shall have deuterium. In the short run we shall need energy that is readily usable and abundant; we shall have uranium. Right now we need energy that is cheap and convenient; we have coal and oil. Nature has been kinder to us than we h...18 FEB 2021 by ideonexus
Newton on Why There is a God
As to your first query, it seems to me that if the matter of our sun and planets
and all the matter of the universe were evenly scattered throughout all the heavens,
and every particle had an innate gravity toward all the rest, and the whole space
throughout which this matter was scattered was but finite, the matter on the outside
of this space would, by its gravity, tend toward all the matter on the inside and, by
consequence, fall down into the middle of the whole space and there compose on...Interesting for how it portrays his understanding of the cosmos and matter.
08 NOV 2019 by ideonexus
The World and Beliefs
The world with its quarks and chromosomes, its distant lands and spiral nebulae, is like a vast computer in a black box, forever sealed except for its input and output registers. These we directly observe, and in the light of them we speculate on the structure of the machine, the universe. Thus it is that we think up the quarks and chromosomes, the distant lands and the nebulae; they would account for the observable data. When an observation turns out unexpectedly, we may try modifying our th...Folksonomies: belief
Folksonomies: belief
02 MAR 2019 by ideonexus
The Anthropic Principle
As an example of the power of the Anthropic Principle, consider the number of directions in space. It is a matter of common experience that we live in three-dimensional space. That is to say, we can represent the position of a point in space by three numbers. For example, latitude. longitude and height above sea level. But why is space three-dimensional? Why isn't it two, or four, or some other number of dimensions, hke in science fiction? In fact, in M-theory space has ten dimensions (as wel...Folksonomies: anthropic principle
Folksonomies: anthropic principle