Monday, 23 May 2011

Importance Of Science In The World

A term whose Latin equivalent, scientia, means ‘‘knowledge’’. It was used in a similarly broad fashion in English until the seventeenth century, often in complementary partnership with ‘‘conscience’’, which usually referred to a more intuitive or passionate sense of knowing. It was also used more narrowly to refer to an academic discipline or a body of skills, being virtually synonymous in the latter sense with one of the meanings of art.
The principal items of the Medieval university curriculum—the quadrivium (logic, arithmetic, geometry, and astronomy) and the trivium (grammar, rhetoric, and music)—were sometimes lumped together as the ‘‘seven sciences’’, as in Stephen Hawes’ allegorical Passetyme of Pleasure; or, the Historie of Graunde Amoure and La Belle Pucel, Containing the Knowledge of the Seven Sciences and the Course of Man’s Life in This Worlde (written 1506; printed 1509), but as the ‘‘New Learning’’ made further progress in the sixteenth and seventeenth centuries, it became increasingly common to draw distinctions between ‘‘arts’’ and ‘‘sciences’’, resulting in a gradual restriction of the latter term to disciplines requiring theoretical understanding. Andrew Maunsell’s pioneering Catalogue of English Printed Bookes (1595) employed a tripartite fundamental division of the New Learning. The first (and much the largest) category was that of ‘‘Divinitie’’; the second contained two subdivisions, ‘‘Arithmetick, Geometrie, Astronomie, Astrologie, Musick, The Art of Warre and Navigation’’ being lumped together as Mathematicall, while Physick and Surgery were combined in their own subcategory; the third section—which was never completed—lumped ‘‘Gramer, Logick, Rethorick, Lawe, Historie, Poetrie, Policie, etc.’’ under the general heading Humanity. This taxonomic scheme is still echoed in modern university organisation, in the slightly blurred distinction between theology, theoretical and applied sciences, and ‘‘the humanities’’.
From the early eighteenth century onwards, the distinctive meaning of ‘‘science’’ became more sharply refined, referring to a body of observations subject to theoretical organisation; this became the word’s modern meaning, displacing ‘‘natural philosophy’’ to become the key element in a parcel of terms that also included the modern meaning of ‘‘empirical’’ investigation and ‘‘experimental’’ proof. Mark Akenside’s ‘‘Hymn to Science’’ (1739) retains a broader meaning of the term, but is aware in so doing that the meaning is old-fashioned and requires a certain exercise of poetic licence. It was not until the early nineteenth century, however, that such phrases as ‘‘the scientific method’’ and ‘‘scientific truth’’ entered common currency, and retrospective reference to a ‘‘scientific revolution’’ within the New Learning, led by such heroes as Francis Bacon and Isaac Newton, became commonplace. William Whewell’s summaries of the history and philosophy of science in 1837–1840 cemented the modern notion of what science is—or what sciences are—within the English language.
The original synonymy of science and knowledge is retained in the positivist view that only the contents of science constitute authentic knowledge of the world, all other claims being metaphysical, and hence bogus. Such a view is, however, controversial, often cited as evidence of the kind of arrogance that licenses use of the term ‘‘scientism’’. Attempts by the logical positivists and Ludwig Wittgenstein’s Tractatus Logico-Philosphicus (1921) to rule all statements that are incapable of scientific justification devoid of meaning caused considerable resentment, and were soon overtaken by more generous and more flexible theories of meaning. The idea persisted that there is some kind of supplementary or ‘‘higher’’ truth of which scientific truth is only a component; the Notion is very often given literary expression, assisted by a widespread belief among litterateurs that great literature is itself a component of that higher knowledge. The most obvious literary reflection of the history of the term ‘‘science’’ is the emergence and proliferation of the genres of ‘‘scientific romance’’ and ‘‘science fiction’’, whose dominance by speculative futuristic fiction emphasises the notion of science as a dynamic force determining the evolution of human thought and—via its technological spin-off—practical endeavour. It is this notion, rather than any mere acquaintance with sophisticated theory, that was responsible for the growth in the twentieth century of a ‘‘culture of science’’ distinguishable, in C. P. Snow’s sense, from the culture of literature and the arts. Even litterateurs who would not endorse the proposition that literature is a component of higher knowledge tend to be preoccupied with its heritage, thus tending to a nostalgic conservatism that is at odds with the transformative tendencies of science and technology. (Even those aspects of science that are ‘‘finished’’—in the sense that the relevant laws are fully elucidated— are usually regarded by scientists as instruments of future practical endeavour rather than precious items of conservation.)

Friday, 13 May 2011

Science Fiction

Given all this, it is not surprising that the seemingly oxymoronic phrase ‘‘science fiction’’ is of recent and disreputable coinage, routinely seeming offensive to scientists and literary men alike, nor that, while science evolved so rapidly and so wondrously in the seventeenth and eighteenth centuries, the reflections of that triumphant progress in the literary world were fragmentary, elliptical, and grudging. Nor is it any wonder that even in the nineteenth and twentieth centuries—while science went from strength to strength in establishing its empire of belief—the vast majority of litterateurs remained conspicuously diffident or dissident, mostly refusing to have any truck with it except to hurl occasional abuse. The surprising thing is not that ‘‘science fiction’’ was born despicable in an age of scientific glory, but that it was ever born at all. When the term ‘‘science fiction’’ was reinvented in the 1920s to describe a new genre of popular fiction—whose commodification was eventually successful, though gradual and far from unproblematic—its inventors and adherents had little difficulty in constructing a literary tradition going back fifty years, and a little more, but they had to recognise that the body of work in question was a mere trickle compared to the vast surge of the literary ‘‘mainstream’’: a tradition that had been and remained stubbornly indifferent to, if not proudly ignorant of, the progress of science. Nor did the advent of science fiction signal or hold out any hope for a modification of policy; indeed, science fiction emerged as a labeled genre at exactly the moment in history at which the last vestiges of intellectual communion between scientific and literary men were in the process of being severed, resulting in the emergence, in C. P. Snow’s famous formulation, of ‘‘the two cultures.’’
The evolution of generic science fiction since the label was coined—as tracked in such volumes as the Encyclopedia of Science Fiction compiled by John Clute and Peter Nicholls in 1992—has not involved any conspicuous sophistication of the relationship between its two ostensible components. Indeed, the label was so promiscuously applied that it became necessary within a few decades of its coinage to invent a special term (‘‘hard’’ science fiction)—to describe the small fraction of texts published under the label that attempted to maintain a manifest respect for the scientific method and its produce. Within a few decades more, even that term had been cheapened to the point at which it was routinely used to refer to any texts sheltering under the label’s umbrella that contained any reference whatsoever to science, the vast majority having none at all.

Tuesday, 10 May 2011

New Technology

The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.
Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical demonstrations that can be verified by repetition (see Scientific Method). Science, at least in theory, is less concerned with the practicality of its results and more concerned with the development of general laws, but in practice science and technology are inextricably involved with each other. The varying interplay of the two can be observed in the historical development of such practitioners as chemists, engineers, physicists, astronomers, carpenters, potters, and many other specialists. Differing educational requirements, social status, vocabulary, methodology, and types of rewards, as well as institutional objectives and professional goals, contribute to such distinctions as can be made between the activities of scientists and technologists; but throughout history the practitioners of “pure” science have made many practical as well as theoretical contributions.
Indeed, the concept that science provides the ideas for technological innovations and that pure research is therefore essential for any significant advancement in industrial civilization is essentially a myth. Most of the greatest changes in industrial civilization cannot be traced to the laboratory. Fundamental tools and processes in the fields of mechanics, chemistry, astronomy, metallurgy, and hydraulics were developed before the laws governing their functions were discovered. The steam engine, for example, was commonplace before the science of thermodynamics elucidated the physical principles underlying its operations.
In recent years a sharp value distinction has grown up between science and technology. Advances in science have frequently had their bitter opponents, but today many people have come to fear technology much more than science. For these people, science may be perceived as a serene, objective source for understanding the eternal laws of nature, whereas the practical manifestations of technology in the modern world now seem to them to be out of control.

Tuesday, 12 April 2011

Space Sunshades

Roger Angel at the University of Arizona has proposed launching trillions of space shades into what as known is the L-1 orbit between the sun and Earth.
These shades—each about two-feet in diameter and weighing only a gram—would collectively form a long, cylindrical cloud that would ultimately reduce sunlight hitting Earth by about two percent.
The project has been viewed as prohibitively expensive. Angel says the project could feasibly be deployed in 25 years for a few trillion dollars, which includes the cost of producing and blasting 20 million tons of shades into space.

Monday, 4 April 2011

Cloud Seeding

Another way to reflect more sunlight back into space is to increase reflectivity of the world's marine clouds, which cover a quarter of the ocean's surface. John Latham and Stephen Salter of the University of Edinburgh have proposed wind-powered yachts (pictured) that would spray seawater droplets into the air to produce more clouds.
Latham says that about a thousand of these vessels would be needed to make the plan effective, and that they should be deployed in the southern oceans, where most reflective marine stratocumulus clouds are. But more testing is necessary to better understand the ecological and meteorological consequences.

Sunday, 20 March 2011

White Roofing

The Greek island of Santorini in the Mediterranean is famous for the limestone whitewashed houses that reflect the sun's scorching heat. This is not only nice to look at but also means less energy is needed to cool the buildings.
According to a study from Lawrence Berkeley National Laboratory in California, replacing non-reflective, dark roofing materials with a white roof on a house with a 1,000-square-foot roof would reduce CO2 emissions by 10 metric tons a year.
To put this into perspective, about one metric ton of CO2 is produced from the monthly energy demand of a typical American household.

Thursday, 10 March 2011

Vertical Farming

Food production is one of the main reasons for deforestation. Since we need space for agriculture and a healthy climate why don’t we combine both?
Dr. Dickson Despommier of Columbia University has developed a concept that would save trees and energy. Vertical farms, multiple-story greenhouses, produce food right within in the city and cut energy usage; a green roof saves energy in winter because you don’t have heat escaping from the building, and also in summer because it traps cool air inside.

Saturday, 19 February 2011

Weather

Weather is a term that encompasses phenomena in the atmosphere of a planet.
The term is normally taken to mean the activity of these phenomena over short periods of time, usually no more than a few days.

Average atmospheric conditions over significantly longer periods are known as climate.
Usage of the two terms often overlaps and the physical concepts underlying them are closely related.
On Earth, regularly occurring weather phenomena include such things as wind, cloud, rain, snow, fog and dust storms.
Less common events include natural disasters such as tornadoes, hurricanes and ice storms.
Almost all familiar weather phenomena occur in the troposphere (the lower part of the atmosphere).
Weather does occur in the stratosphere and does affect weather lower down in the troposphere, but the exact mechanisms are poorly understood. The Earth's atmosphere is a chaotic system, so small changes to one part can have large effects elsewhere.
This makes it very difficult to accurately predict weather changes more than a few days in advance, though weather forecasters are continually working to extend this limit through the scientific study of weather, meteorology.
For more information about the topic Weather, read the full article at Wikipedia.org, or see the following related articles:
Eucalyptus and related trees — Eucalypts are tree species belonging to three closely related genera, Angophora, Corymbia and Eucalyptus. Of these, Eucalyptus has the most species,
Probability theory — Probability theory is the mathematical study of phenomena characterized by randomness or uncertainty. More precisely, probability is used
Season — A season is one of the major divisions of the year, generally based on yearly periodic changes in weather. In temperate and polar regions
Crust (geology) — In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic,

Thursday, 10 February 2011

Atmospheric chemistry

Atmospheric chemistry is a branch of atmospheric science in which the chemistry of the Earth's atmosphere and that of other planets is studied.
See also:
It is a multidisciplinary field of research and draws on environmental chemistry, physics, meteorology, computer modeling, oceanography, geology and volcanology and other disciplines.
For more information about the topic Atmospheric chemistry, see the following related articles:
Earth science — Many scientists are now starting to use an approach known as Earth system science which treats the entire Earth as a system in its own right,
Geophysics — Geophysics, the study of the earth by quantitative physical methods, especially by seismic reflection and refraction, geodesy, gravity, magnetic,
Planetary boundary layer — The planetary boundary layer (PBL) is also known as the atmospheric boundary layer (ABL). It is the lowest part of the atmosphere and its behavior
Nitrogen oxide — NOx is a generic term for the various nitrogen oxides produced during combustion. They are believed to aggravate asthmatic conditions, react with the