means of information and communication technology 2

8/3/2019 Means of Information and Communication Technology 2

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Means of information and

communication technology

By:Wafi

Class: 7-B


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Ancient Communication Media

1. Kentongan

Has been used for a longtime, sterted from

kingdom of denmark, surakarta, yogyakarta

and etc

Fungtion

To give information (code/sign) forflood,robbery,party, celebration

Sign that praying time has come


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Smoke

Famous for Indian tribe in AmericaFunction send secret information to a friend

or foe Semple: one cloud of smoke means

warningTwo cloud of smoke mean danger

threetrouble/reques

t for help


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Epigraphy and Palmyra palm

Palmyra palms are economically useful, andwidely cultivated in tropical regions. The

palmyra palm has long been one of the most

important trees ofCambodia and India,

where it has over 800 uses. The leaves are

used

forthatching, mats, baskets, fans, hats, umbr

ellas, and as writing material.
http://en.wikipedia.org/wiki/Cambodiahttp://en.wikipedia.org/wiki/Indiahttp://en.wikipedia.org/wiki/Thatchhttp://en.wikipedia.org/wiki/Mathttp://en.wikipedia.org/wiki/Baskethttp://en.wikipedia.org/wiki/Fan_(implement)http://en.wikipedia.org/wiki/Hathttp://en.wikipedia.org/wiki/Umbrellahttp://en.wikipedia.org/wiki/Umbrellahttp://en.wikipedia.org/wiki/Writinghttp://en.wikipedia.org/wiki/Writinghttp://en.wikipedia.org/wiki/Umbrellahttp://en.wikipedia.org/wiki/Umbrellahttp://en.wikipedia.org/wiki/Hathttp://en.wikipedia.org/wiki/Fan_(implement)http://en.wikipedia.org/wiki/Baskethttp://en.wikipedia.org/wiki/Mathttp://en.wikipedia.org/wiki/Thatchhttp://en.wikipedia.org/wiki/Indiahttp://en.wikipedia.org/wiki/Cambodia


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Modern communication The internet, cell phones, fax machines and pagers are a way

of life in modern society. All these technologies relyon lasers and fiber optics. The principle behind a laser lies

embedded in the heart of quantum mechanics. Einstein built on

the theory of quantum mechanics to explain the photoelectric

effect in 1905 and showed that electrons could absorb and emitthe energy of photons. In 1917, he went on to discover that this

emission could be focused so that it occurs at a

single frequency. This is known as stimulated emission.

Scientists applied this principle in the mid-1950s to stimulate

emission of microwaves using a device called a maser. They

then applied the same principle to visible light and used the

term laser for this device. However, they could not produce a

steady laser light, which was necessary for practical

applications (see Physics in the 20th Century).
http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2311http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2311


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Research on semiconductors led to the

development of semiconductor lasers. By the late

1960s, researchers had devised a method tooperate lasers continuously at room temperatures

using layers of semiconductors. Now they needed

to find a method to transmit light across large

distances (seeSemiconductor Lasers). Althoughscientists knew that glass fibers could carry light

over short distances, it was not a very efficient

process. Theoretical work showing that light loss

in glass fibers could be decreased dramatically

spurred experimental efforts to produce such

fibers.
http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2308http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2308


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Researchers continued exploring techniques todecrease light loss in optical fibers. It then became

possible to take fiber-optic communication out of

the laboratory and into everyday life. Meanwhile,

scientists continued improving laser technology

and by the late 1970s, commercial use of fiber-optic systems had begun (see Practical Systems

Take Shape). As fiber optic cables began to be

used world-wide, basic research continued to yield

improvements in the systems. Yet morepossibilities for improvement in high-speed data

lines are available and looming on the horizon

(see Basic Research Remains Vital).
http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2309http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2309http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2310http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2310http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2309http://www.beyonddiscovery.org/Includes/DBLink.asp?ID=2309


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A newspaper is a

scheduled publication containing news of current

events, informative articles, diverse features and

advertising. It usually is printed on relatively

inexpensive, low-grade paper such as newsprint.

By 2007, there were 6580 daily newspapers in the

world selling 395 million copies a day. The

worldwide recession of 2008, combined with the

rapid growth of web-based alternatives, caused a

serious decline in advertising and circulation, asmany papers closed or sharply retrenched

operations.[1]
http://en.wikipedia.org/wiki/Publicationhttp://en.wikipedia.org/wiki/Newshttp://en.wikipedia.org/wiki/Newsprinthttp://en.wikipedia.org/wiki/Newspaperhttp://en.wikipedia.org/wiki/Newspaperhttp://en.wikipedia.org/wiki/Newspaperhttp://en.wikipedia.org/wiki/Newspaperhttp://en.wikipedia.org/wiki/Newsprinthttp://en.wikipedia.org/wiki/Newshttp://en.wikipedia.org/wiki/Publication


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Television (TV) is

a telecommunicationmedium fortransmitting and receiving moving images

that can be monochrome (black-and-white)

or colored, with accompanying sound.

"Television" may also refer specifically to

a television set, television

programming, television transmission.
http://en.wikipedia.org/wiki/Telecommunicationhttp://en.wikipedia.org/wiki/Mass-mediahttp://en.wikipedia.org/wiki/Monochromehttp://en.wikipedia.org/wiki/Black-and-whitehttp://en.wikipedia.org/wiki/Television_sethttp://en.wikipedia.org/wiki/Television_programhttp://en.wikipedia.org/wiki/Television_programhttp://en.wikipedia.org/wiki/Transmission_(telecommunications)http://en.wikipedia.org/wiki/Transmission_(telecommunications)http://en.wikipedia.org/wiki/Television_programhttp://en.wikipedia.org/wiki/Television_programhttp://en.wikipedia.org/wiki/Television_sethttp://en.wikipedia.org/wiki/Black-and-whitehttp://en.wikipedia.org/wiki/Black-and-whitehttp://en.wikipedia.org/wiki/Black-and-whitehttp://en.wikipedia.org/wiki/Black-and-whitehttp://en.wikipedia.org/wiki/Black-and-whitehttp://en.wikipedia.org/wiki/Monochromehttp://en.wikipedia.org/wiki/Mass-mediahttp://en.wikipedia.org/wiki/Telecommunication


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The Daily Telegraph is a daily

morning broadsheet newspaper distributedthroughout the United Kingdom and

internationally. The newspaper was founded

by Arthur B. Sleigh in June 1855 as

theDaily Telegraph and Courier, and is

since 2004 owned by David and Frederick

Barclay.
http://en.wikipedia.org/wiki/Broadsheethttp://en.wikipedia.org/wiki/Arthur_B._Sleighhttp://en.wikipedia.org/wiki/David_and_Frederick_Barclayhttp://en.wikipedia.org/wiki/David_and_Frederick_Barclayhttp://en.wikipedia.org/wiki/David_and_Frederick_Barclayhttp://en.wikipedia.org/wiki/David_and_Frederick_Barclayhttp://en.wikipedia.org/wiki/Arthur_B._Sleighhttp://en.wikipedia.org/wiki/Broadsheet


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Facsimile

Afacsimile

(from Latinfac simile

, "madealike") is a copy or reproduction of an

old book, manuscript, map, art print, or

other item of historical value that is as true

to the original source as possible. It differs

from other forms of reproduction by

attempting to replicate the source as

accurately as possible in terms of scale,color, condition, and other material

qualities.
http://en.wikipedia.org/wiki/Latinhttp://en.wikipedia.org/wiki/Bookhttp://en.wikipedia.org/wiki/Manuscripthttp://en.wikipedia.org/wiki/Maphttp://en.wikipedia.org/wiki/Old_master_printhttp://en.wikipedia.org/wiki/Old_master_printhttp://en.wikipedia.org/wiki/Maphttp://en.wikipedia.org/wiki/Manuscripthttp://en.wikipedia.org/wiki/Bookhttp://en.wikipedia.org/wiki/Latin


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Comunication Radio

Radio is the transmission of signals through

free space by modulation ofelectromagnetic

waves with frequencies below those

ofvisible light.[1]Electromagnetic

radiation travels by means of

oscillating electromagnetic fields that pass

through the air and the vacuum of space.
http://en.wikipedia.org/wiki/Transmission_(telecommunications)http://en.wikipedia.org/wiki/Electromagnetic_radiationhttp://en.wikipedia.org/wiki/Electromagnetic_radiationhttp://en.wikipedia.org/wiki/Frequencyhttp://en.wikipedia.org/wiki/Visible_lighthttp://en.wikipedia.org/wiki/Radiohttp://en.wikipedia.org/wiki/Radio_propagationhttp://en.wikipedia.org/wiki/Electromagnetic_fieldhttp://en.wikipedia.org/wiki/Vacuumhttp://en.wikipedia.org/wiki/Vacuumhttp://en.wikipedia.org/wiki/Electromagnetic_fieldhttp://en.wikipedia.org/wiki/Radio_propagationhttp://en.wikipedia.org/wiki/Radiohttp://en.wikipedia.org/wiki/Visible_lighthttp://en.wikipedia.org/wiki/Frequencyhttp://en.wikipedia.org/wiki/Electromagnetic_radiationhttp://en.wikipedia.org/wiki/Electromagnetic_radiationhttp://en.wikipedia.org/wiki/Transmission_(telecommunications)


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THE END

means of information and communication technology 2

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