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Nanotechnology

Nanotechnology, the creation and use of materials or devices at extremely small scales. These materials or devices fall in the range of 1 to 100 nanometers (nm). One nm is equal to one-billionth of a meter (.000000001 m), which is about 50,000 times smaller than the diameter of a human hair. Scientists refer to the dimensional range of 1 to 100 nm as the nanoscale, and materials at this scale are called nanocrystals or nanomaterials.                   The...

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Wireless Communation

Wireless Communications, various telecommunications systems that use radio waves to carry signals and messages across distances. Wireless communications systems include cellular telephones, pagers, radio telegraphs, satellite telephones, laptop computers, personal digital assistants (PDAs), shortwave radios, and two-way radios. They are used primarily to transmit private communications. Commercial radio and television are also wireless telecommunications systems, but radio and television are mainly public broadcast services rather than private...

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Cmputer

The Computer is one of the wonderfull invention of morden science and techology. Computer is an electrinic device tha compute,manipulate and summon the large anomout of the informaions much very fast that the human can do mannulay. In aother words, It is an electronic device that calcultes, manipulates and stores large amount of data or informaions. Very beging people had no facility to keep record their things. They used to keep their record by collecting pice of stone or wood. With passage of time, people have deveoped the things that are automated...

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Morden Technology

By the end of the Middle Ages the technological systems called cities had long since become a central feature of Western life. In 1600 London and Amsterdam each had populations of more than 100,000, and twice that number resided in Paris. Also, the Dutch, English, Spanish, and French were beginning to develop global empires. Colonialism and trade produced a powerful merchant class that helped to create an increasing desire for such luxuries as wine, coffee, tea, cocoa, and tobacco. These merchants acquired libraries, wore clothing made of...

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The Earliest Technology

The earliest known human artifacts are roughly flaked stones used for chopping and scraping, found primarily in eastern Africa. Known as Oldoman tools, they date from about 2.3 million years before present, and serve to define the beginning of the Stone Age. The first toolmakers were nomadic groups of people who used the sharp edges of stone to process food. By about 40,000 years before present, humans had begun to use fire and to make a variety of tools, including pear-shaped axes, scrapers, knives, and other instruments of stone, bone,...

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Dfintion of Tecnology

Technology, general term for the processes by which human beings fashion tools and machines to increase their control and understanding of the material environment. The term is derived from the Greek words 'tekhne', which refers to an art or craft, and logia, meaning an area of study; thus, technology means, literally, the study, or science, of crafting. Many historians of science argue not only that technology is an essential condition of advanced, industrial civilization but also that the rate of technological change has developed its...

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Television

Television, system of sending and receiving pictures and sound by means of electronic signals transmitted through wires and optical fibers or by electromagnetic radiation. These signals are usually broadcast from a central source, a television station, to reception devices such as television sets in homes or relay stations such as those used by cable television service providers. Television is the most widespread form of communication in the world. Though most people will never meet the leader of a country, travel to the moon, or participate...

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