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Big bang theory

Fri, 22 Jan 2010 03:40:09 +0100

The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big bang. This theory was born of the observation that other galaxies are moving away from our own at great speed, in all directions, as if they had all been propelled by an ancient explosive force.

Before the big bang, scientists believe, the entire vastness of the observable universe, including all of its matter and radiation, was compressed into a hot, dense mass just a few millimeters across. This nearly incomprehensible state is theorized to have existed for just a fraction of the first second of time.

Big bang proponents suggest that some 10 billion to 20 billion years ago, a massive blast allowed all the universe's known matter and energy—even space and time themselves—to spring from some ancient and unknown type of energy.

The theory maintains that, in the instant—a trillion-trillionth of a second—after the big bang, the universe expanded with incomprehensible speed from its pebble-size origin to astronomical scope. Expansion has apparently continued, but much more slowly, over the ensuing billions of years.

Scientists can't be sure exactly how the universe evolved after the big bang. Many believe that as time passed and matter cooled, more diverse kinds of atoms began to form, and they eventually condensed into the stars and galaxies of our present universe.

Origins of the Theory

A Belgian priest named Georges Lemaître first suggested the big bang theory in the 1920s when he theorized that the universe began from a single primordial atom. The idea subsequently received major boosts by Edwin Hubble's observations that galaxies are speeding away from us in all directions, and from the discovery of cosmic microwave radiation by Arno Penzias and Robert Wilson.

The glow of cosmic microwave background radiation, which is found throughout the universe, is thought to be a tangible remnant of leftover light from the big bang. The radiation is akin to that used to transmit TV signals via antennas. But it is the oldest radiation known and may hold many secrets about the universe's earliest moments.

The big bang theory leaves several major questions unanswered. One is the original cause of the big bang itself. Several answers have been proposed to address this fundamental question, but none has been proven—and even adequately testing them has proven to be a formidable challenge.

kidnapped

Tue, 12 Jan 2010 04:28:32 +0100

Kidnapped is a historical fictionadventure novelby the Scottishauthor Robert Louis Stevenson. Written as a "boys' novel" and first published in the magazine Young Folks from May to July 1886, the novel has attracted the praise and admiration of writers as diverse as Henry James, Jorge Luis Borges, and Seamus Heaney. A sequel, Catriona, was published in 1893.

As historical fiction, it is set around 18th-century Scottish events, notably the "Appin Murder", which occurred near Ballachuli...

Health

Tue, 12 Jan 2010 04:12:54 +0100

Posted by Nopparat Sanyawut on Tuesday, January 12, 2010, In : Health Education

A goal is something you hope to accomplish and that you work toward to achieve.Short-term goals are those that can be reached in days or weeks.Long-term goals,on thwe months or years to reach.Goals help you know the way you'd like your life to go.

ICT system

Tue, 12 Jan 2010 03:51:50 +0100

The GCSE ICT course is all about ICT systems. You need to know the general structure of information systems, and how they work; the role of input, output, processing and feedback; and the integration of ICT devices and ICT information systems.

What is an ICT System?

An ICT system is a set-up consisting of hardware, software, data and the people who use them. It commonly includes communications technology, such as the Internet.

ICT and computers are not the same thing.

Computers are the hardware that is often part of an ICT system.

This is why your GCSE is not just about computers but about how, why and when people use them. It is the power of computers and communications that has allowed ICT systems to become so important. Like any piece of equipment, the important thing about it is what it lets us do.

ICT Systems are used in a number of environments, such as:

offices
shops
factories
aircraft
ships

They're also used in fields such as:

communications
medicine
farming

ICT Systems are everyday and ordinary, yet extraordinary in how they can add extra power to what we do and want to do.

The importance of ICT systems

By using ICT systems we are:

more productive - we can complete a greater number of tasks in the same time at reduced cost by using computers than we could prior to their invention
able to deal with vast amounts of information and process it quickly
able to transmit and receive information rapidly

Thailand system

Tue, 12 Jan 2010 03:37:48 +0100

thailand economy system is capitalism

Capitalism is an economic and social system in which capital, the non-labor factors of production (also known as the means of production), is privately owned;^{[citation needed]} labor, goods and capital are traded in markets; and profits distributed to owners or invested in technologies and industries.

There is no consensus on the definition of capitalism, nor how it should be used as an analytical category.^[1] There are a variety of historical cases over which it is applied, varying in time, geography, politics and culture.^[2] Economists, political economists and historians have taken different perspectives on the analysis of capitalism. Scholars in the social sciences, including historians, economic sociologists, economists, anthropologists and philosophers have debated over how to define capitalism, however there is little controversy that private ownership of the means of production, creation of goods or services for profit in a market, and prices and wages are elements of capitalism.^[3]

Economists usually put emphasis on the market mechanism, degree of government control over markets (laissez faire), and property rights^[4]^[5], while most political economists emphasize private property, power relations, wage labor, and class.^[6] There is a general agreement that capitalism encourages economic growth.^[7] The extent to which different markets are "free", as well as the rules determining what may and may not be private property, is a matter of politics and policy and many states have what are termed "mixed economies."^[6]

Capitalism as a system developed incrementally from the 16th century in Europe,^[8] although capitalist-like organizations existed in the ancient world, and early aspects of merchant capitalism flourished during the Late Middle Ages.^[9]^[10]^[11] Capitalism became dominant in the Western world following the demise of feudalism.^[11] Capitalism gradually spread throughout Europe, and in the 19th and 20th centuries, it provided the main means of industrialization throughout much of the world.^[2]

Variants on capitalism may include, depending on the theorist, such concepts as anarcho-capitalism, corporate capitalism, crony capitalism, finance capitalism, laissez-faire capitalism, technocapitalism, Neo-Capitalism, late capitalism, post-capitalism, state capitalism and state monopoly capitalism. There are also anti-capitalist movements and ideologies including Anti-capitalism and negative associations with the system such as tragedy of the

Dr.Ian Plimer

Fri, 13 Nov 2009 03:57:52 +0100

What Heavn And Earth sets out to do is restore a sense of scientific perspective to a debgate which has been hijacked by politicians environmental actvicists and opportunists than climate changes are cyclical and random is only 0.001 per cent of the co2 held in earth warmer

Prof. James Lovelock

Tue, 08 Dec 2009 04:31:56 +0100

James Lovelock : independent scientist, environmentalist, author and researcher, Doctor Honoris Causa of several universities throughout the world, he is considered since several decades as a one of the main ideological leaders, if not the main one, in the history of the development of environmental awareness. James Lovelock is still today one of the main authors in the environmental field. He is the author of " The GaiaTheory ", and " The Ages of Gaia", which consider the planet Earth as a self-regulated living being, as well as his "Homage to GAIA", an autobiography published in september 2000. More recently, professor Lovelock published his new book, " The Revenge of Gaia".

Al Gore

Tue, 08 Dec 2009 04:37:30 +0100

Albert Arnold "Al" Gore, Jr. (born March 31, 1948) is an Americanenvironmentalactivistand former politician who served as the 45thVice President of the United Statesfrom 1993 to 2001 under PresidentBill Clinton. He is an author, businessperson, former U.S. Senatorand former journalist. Gore also starred in the 2006 documentary An Inconvenient Truth, which won an Academy Awardin 2007 and wrote the book An Inconvenient Truth: The Planetary Emergency of Global Warming and What We Can Do About It, which won a Grammy Award for Best Spoken Word Albumin February 2009.^[2]