Realizing that he'd need to lower costs
The use of interchangeable parts meant making the individual pieces of the car the same every time. Therefore the machines had to be improved, but once they were adjusted, they could be operated by a low-skilled laborer. To reduce the time workers spent moving around Ford refined the flow of work in the manner that as one task was finished another began, with minimum time spent in set-up. Furthermore he divided the labor by breaking the assembly of the legendary Model T in 84 distinct steps.
Putting all those findings together in 1913 Ford installed the first moving
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Besides ordinary religious manipulation-tools the Egyptians were masters of using architecture for propaganda. In Egypt, most of all, architecture was used as a media to demonstrated power, whereas the Greek and Romans used other types of art, like statues, for political propaganda.
The pyramids, palaces, tombs became tools for power demonstrations. Paintings and carvings (like on obelisks) proved the might of the rulers.
All those signs of power were done to make people compare their ruling dynasty to gods and keep them politically silent, because religion was used for justifying mortal power. Marble, gold, jewelry and artists were the tools for those maneuvers. Whereas questions for the truth were not even asked or listened to.
Finally it was the masses who were used for propaganda, when they were not only forced to work as slaves on those signs of power but also were abused for those power demonstrations, when they had to accompany the dead king into his tomb - dying of hunger, thirst, lack of oxygen and in darkness. The more religious disinformation the more luxury. The more luxury the better. The more luxury the more power.
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Here the keys for encryption and decryption differ. There needs to exist a private key, which is only known to the individual, and a public key, which is published. Every person has her or his own private key that is never published. It is used for decrypting only. Mathematically the different keys are linked to each other, still it is nearly impossible to derive the private key from the public one.
For sending a message to someone, one has to look up the other's public key and encrypt the message with it. The keyholder will use his/her private key to decrypt it. While everybody can send a message with the public key, the private key absolutely has to stay secret - and probably will.
"The best system is to use a simple, well understood algorithm which relies on the security of a key rather than the algorithm itself. This means if anybody steals a key, you could just roll another and they have to start all over." (Andrew Carol)
very famous examples for public-key systems are:
· RSA:
The RSA is probably one of the most popular public-key cryptosystems. With the help of RSA, messages can be encrypted, but also digital signatures are provided.
The mathematics behind are supposedly quite easy to understand (see:
· PGP:
PGP is a public key encryption program. Most of all it is used for e-mail encryption.
It is supposed to be quite safe - until now.
· PGPi is simply the international variation of PGP.
for further information about the RSA and other key-systems visit the RSA homepage:
or:
All of those tools, like hash functions, too, can help to enhance security and prevent crime.
They can theoretically, but sometimes they do not, as the example of the published credit card key of France in March 2000 showed.
For more information see:
Still, cryptography can help privacy.
On the other hand cryptography is only one element to assure safe transport of data. It is especially the persons using it who have to pay attention. A key that is told to others or a lost cryptographic key are the end of secrecy.
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Eli Whitney's proposal for a simplification and standardization of component parts marked a further milestone in the advance of the
By the middle of the 19th century the general concepts of
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Traditionally, an avatar is a mythical figure half man half god. In Hindu mythology, avatars are the form that deities assume when they descend on earth. Greek and Roman mythologies also contain avatars in animal form or half animal, half man. In virtual space, the word avatar refers to a "virtual identity" that a user can construct for him / herself, e.g. in a chat-room. Avatars have also been a preferred object of media art.
b. Jan. 4, 1809, Coupvray, near Paris, France
d. Jan. 6, 1852, Paris, France
Educator who developed a system of printing and writing that is extensively used by the blind and that was named for him. Himself blind Braille became interested in a system of writing, exhibited at the school by Charles Barbier, in which a message coded in dots was embossed on cardboard. When he was 15, he worked out an adaptation, written with a simple instrument, that met the needs of the sightless. He later took this system, which consists of a six-dot code in various combinations, and adapted it to musical notation. He published treatises on his type system in 1829 and 1837.
According to Barbrook and Cameron there is an emerging global orthodoxy concerning the relation between society, technology and politics. In this paper they are calling this orthodoxy the Californian Ideology in honor of the state where it originated. By naturalizing and giving a technological proof to a political philosophy, and therefore foreclosing on alternative futures, the Californian ideologues are able to assert that social and political debates about the future have now become meaningless and - horror of horrors - unfashionable. - This paper argues for an interactive future.
http://www.wmin.ac.uk/media/HRC/ci/calif.html
Although referred to as a single body of rules, there is not just one Netiquette, but there are several, though overlapping largely. Proposing general guidelines for posting messages to newsgroups and mailing lists and using the
Well-known Netiquettes are the
Blowfish is a symmetric key block cipher that can vary its length.
The idea behind is a simple design to make the system faster than others.