The big "change" ...

With the invention of the printing press and - as a consequence - the distribution of information in masses (by then already mostly in the shape of propaganda), propaganda could change its methods. It could not only be produced but also reproduced and therefore spread widely.
The Protestant Reformation profited by this. The idea of translating the Bible into local languages was successful, because it got possible for many people to get a Bible, as books no longer were affordable only for the nobles and the Church.

Royalty and the Courts realized that prestige asked for propaganda and that it was impossible to reign over the people if their mood turned against the king. This gave the impetus for acting. Pamphlets were used for spreading royal messages; like the so-called "mazarinades" (Taylor, Munitions of the Mind, p. 122), written in a very simple language and spread periodically and in big numbers.
When - in 1896 - newspapers started being distributed in huge amounts, the access to propaganda and disinformation was opened extremely. Newspapers informed the mass - and disinformed them if it was considered as necessary (e.g. in war-times).
From that time on propaganda and manipulation were carried out for the most different political ideas and nearly without frontiers. Censorship - a part of disinformation - seems to have been the only barrier then. Sometimes even the source of a message kept hidden, which was part of the disinformation process. It is easier to spread ideas against somebody if the own name is kept hidden; and speaking out some kind of laudation that the own party is better without mentioning that it was oneself who spread it and therefore claim that it was someone else who praised the very idea.

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The Right to get Disinformed

Disinformation might also be welcome:
While the ones criticize disinformation and try to fight against it, others do nothing against it. And others again seem to enjoy getting disinformed. How this works? It is the result of a society that does no longer want to live under the pressure of doing and hearing everything at the same time. Acceleration of life seems too fast. The only way to get out is to refuse certain things/messages/truths. Receiving disinformation can be more comfortable than getting so-called correct information. This is especially true for the readers of the yellow press. The yellow press lives on that perspective, the commodity of getting light news, mostly wrong news and lies - but those being wrapped up in nice pictures and stories about those who seem to reign the world.
The aim is the escape out of reality.
A surplus of information, information terror, can produce disinformation. The profusion can get exploited for disinformation. This works in that way that in the mass of information the individual has no possibility to get an overview of the different ways of thinking and to reach a stage of objective knowledge.

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Disinformation - A Definition

First of all disinformation can be explained as something that has to do with fears: it frightens us by taking away our individuality, as disinformation is not done for one single person. It is a manipulation; a manipulation the influenced persons did not ask for.

Disinformation is never the launching of one single information/message. Several - and in most cases many - different pieces make up a puzzle of deception. One single message can be called true or false, but only the combination of several and more informations makes up a system that has the power to influence opinions.
The purpose is what produces the disinformation, whereas a wrong information (even as a number of wrong informations) happening by accident represents simply a false information.
The person or group presenting a disinformation knows very well what he/it is doing. The aim is that the person who receives the disinformation gets influenced into a certain and well-planned direction. Therefore the wrong information has to reach the unconscious part of the mind, has to be integrated into personal thoughts.
A good way to reach that goal is to use a commonly known information, something familiar to reach the confidence of the recipient. The best is to use a quasi neutral message. Afterwards the real disinformation is woven into that other information. The mixture between truth, half-truth and lie is the most adequate method to get a disinformation into people's minds.
The knowledge about how to use material and how to slightly change it until the statement turns against someone or some idea, is a type of art to cope with words.

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The Egyptians ...

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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Abstract

Disinformation is part of human communication. Thousands of years ago it was already used as a political medium. In the age of mass-communication and information its possibilities have grown tremendously. It plays an important role in many different fields, together with its "companion" propaganda. Some of these fields are: politics, international relations, the (mass-)media and the internet, but also art and science.
There is no evidence at all for a disappearance of disinformation. On this account it is important to understand where it comes from, what its tools are and how nations (democratic as well as totalitarian systems), international organizations and the media work with it or against it.
This report tries to give a short insight into this topic:
on a theoretical level
by demonstrating cases of disinformation, like the 2nd Chechnya War in 1999.

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The Tools of Disinformation and Propaganda

"In wartime they attack a part of the body that other weapons cannot reach in an attempt to affect the way which participants perform on the field of battle." (Taylor, Munitions of the Mind, p. 9)
Therefore the demonstrated tools refer to political propaganda in the two World Wars.

Propaganda has the ability to change a war, a natural evil, into a so-called "just" war. Violence then is supposedly defense, no more aggression.

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Credibility

The magic word is credibility.

NATO took away part of its credibility by extending more and more the definition of military facilities, which where to be destroyed in order to end the Serb power.

Disinformation can mean leaving out important informations. Telling lies is not the only method of disinformation. The not telling also creates thoughts and delegates them into certain directions, whereas other models of thinking are left out.

Like this, the deaths on the own side are adjusted downwards whereas the victims of the enemy are counted proudly - as long as they are not civilians. The post-Gulf War period demonstrated how the population reacts if the number of innocent victims is much higher than expected. It was the fact of those numbers that provoked the biggest part of the post-war critique.

The media in democratic states tend to criticize this, which does not mean that they always want to be free of governmental influence. They can choose to help the government in a single case by not writing anything against it or by writing pro-government stories.

At the same time every democracy has undemocratic parts in it - which is already part of democracy itself. There are situations when a democratic government may find it essential to put pressure on the media to inform the population in a certain way; and also censorship is nothing that can only be connected to dictatorship; just think of the Falkland War, the Gulf-War or the Kosovo-War.

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The ancient Greek

Disinformation was seen as an appropriate tool of politics and rhetoric in ancient Greece. Most of all persuasion was used, which then was considered a type of art.
Religion was (and in many ways still is) the best disinformer or manipulator; prophecies were constructed to manipulate the population. The important thing was to use emotions and more than anything else fear as a tool for manipulation. If the oracle of Delphi said a war was to fight and would be won, then the Greek population - because of religious motives - was prepared to fight that war.
Propaganda was not only used in wars but also in daily life to bring people together and create a nation.
But poets, playwrights and other artists were manipulating as well. Their pieces of literature and plays were full of political messages with different ideologies behind. In the way how theatre at that time was part of life, it can be understood easily that those messages had not only entertainment's character but also a lot of political and social influence.
A different and very famous part of disinformation in ancient Greek history was the story of Themistocles, who won the battle of Salamis against the Persians.

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Introduction

Political and economic agendas change. People leave, get exchanged. Whereas one of the things that never seem to change is disinformation. Watching different kinds of cultures and regimes throughout history you will always find disinformation.
Its use is variable just like its tools. First of all it does not necessarily need words. It is possible to disinform in any kind of language (sounds, symbols, letters or with the help of the body). As it seems to have come into existence together with human communication, we need not even hope that it will disappear once in a while.
One could rather say: disinformation has always been there.
Instead of hoping to stop it we need to learn to live with it, detect it, restore it to consciousness. Even this will not be any insurance for not walking into the trap. It is an attempt, nothing else.
For detecting disinformation one needs to know what types of disinformation are possible and how they work. This site gives you some ideas about the history, tendencies and different types of disinformation, with the restriction that it will mostly be about the Western types of disinformation, as it is still harder to understand the media of disinformation in other cultures; and anyhow, many methods and tools run parallel in different cultures.

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1950: The Turing Test

Alan Turing, an English mathematician and logician, advocated the theory that eventually computers could be created that would be capable of human thought. To cut through the long philosophical debate about exactly how to define thinking he proposed the "imitation game" (1950), now known as Turing test. His test consisted of a person asking questions via keyboard to both a person and an intelligent machine within a fixed time frame. After a series of tests the computers success at "thinking" could be measured by its probability of being misidentified as the human subject. Still today Turing's papers on the subject are widely acknowledged as the foundation of research in artificial intelligence.

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1940s - Early 1950s: First Generation Computers

Probably the most important contributor concerning the theoretical basis for the digital computers that were developed in the 1940s was Alan Turing, an English mathematician and logician. In 1936 he created the Turing machine, which was originally conceived as a mathematical tool that could infallibly recognize undecidable propositions. Although he instead proved that there cannot exist any universal method of determination, Turing's machine represented an idealized mathematical model that reduced the logical structure of any computing device to its essentials. His basic scheme of an input/output device, memory, and central processing unit became the basis for all subsequent digital computers.

The onset of the Second World War led to an increased funding for computer projects, which hastened technical progress, as governments sought to develop computers to exploit their potential strategic importance.

By 1941 the German engineer Konrad Zuse had developed a computer, the Z3, to design airplanes and missiles. Two years later the British completed a secret code-breaking computer called Colossus to decode German messages and by 1944 the Harvard engineer Howard H. Aiken had produced an all-electronic calculator, whose purpose was to create ballistic charts for the U.S. Navy.

Also spurred by the war the Electronic Numerical Integrator and Computer (ENIAC), a general-purpose computer, was produced by a partnership between the U.S. government and the University of Pennsylvania (1943). Consisting of 18.000 vacuum tubes, 70.000 resistors and 5 million soldered joints, the computer was such a massive piece of machinery (floor space: 1,000 square feet) that it consumed 160 kilowatts of electrical power, enough energy to dim lights in an entire section of a bigger town.

Concepts in computer design that remained central to computer engineering for the next 40 years were developed by the Hungarian-American mathematician John von Neumann in the mid-1940s. By 1945 he created the Electronic Discrete Variable Automatic Computer (EDVAC) with a memory to hold both a stored program as well as data. The key element of the Neumann architecture was the central processing unit (CPU), which allowed all computer functions to be coordinated through a single source. One of the first commercially available computers to take advantage of the development of the CPU was the UNIVAC I (1951). Both the U.S. Census bureau and General Electric owned UNIVACs (Universal Automatic Computer).

Characteristic for first generation computers was the fact, that instructions were made-to-order for the specific task for which the computer was to be used. Each computer had a different binary-coded program called a machine language that told it how to operate. Therefore computers were difficult to program and limited in versatility and speed. Another feature of early computers was that they used vacuum tubes and magnetic drums for storage.

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Media Giants Online

The following selection does not claim to present an exhaustive listing, but rather picks some of the company's most important assets. Due to the rapid developments in the world of media giants the list is also subject to changes.

Broadcasting

ABC TV Network with 223 affiliated TV stations covering the entire U.S.

ABC Radio Network, with 2,900 affiliated stations throughout the U.S.

Owner of 9 VHF TV stations

Owner of 11 AM and 10 FM stations

Cable TV Systems and Channels/Networks

Disney Channel

80 % of ESPN cable TV channel and ESPN International

50 % of Lifetime cable TV channel

Internet/Interactive

Disney Interactive - entertainment and educational computer software and video games, plus development of content for on-line services.

Partnership with 3 phone companies to provide video programming and interactive services.

ABC Online

TV Production, Movies, Video, Music

Disney Television Production studios and Walt Disney Pictures movie studio

Buena Vista Television production company

Buena Vista Home Video

Miramax and Touchstone movie production companies

Buena Vista Pictures Distribution and Buena Vista International, distributors for Disney and Touchstone movies

Walt Disney Records, and Hollywood Records

Publishing

6 daily newspapers

About 40 weekly magazines, including: Discover, Women's Wear Daily, Los Angeles and Institutional Investor.

Chilton Publications

Guilford Publishing Co.

Hitchcock Publishing Co.

Theme Parks, Resorts, and Travel

Disneyland

Disney World and Disney World Resort

Part owner of Disneyland-Paris and Tokyo Disneyland

12 resort hotels

Disney Vacation Club

Cruise Lines

International TV, Film, and Broadcasting

50 % owner of Tele-München Fernseh GmbH & Co.

50 % owner of RTL Disney Fernseh GmbH & Co.

23 % owner of RTL 2 Fernseh GmbH & Co.

37,5 % owner of TM3 Fernseh GmbH & Co.

20-33 % stake in Eurosport network, Spanish Tesauro SA TV company, and Scandinavian Broadcasting System SA

20 % owner of TVA

Other

Over 500 Disney Stores, and licensing of Disney products

The Mighty Ducks professional hockey team

25 % ownership of California Angels major league baseball team

Business Connections with Other Media Companies

Joint ventures, equity interests, or major arrangements with Bertelsmann, TCI, Hearst Corp., Kirch, and various other media and telephone companies.

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Recent "Digital Copyright" Legislation: European Union

Directive on Copyright and Related Rights in the Information Society

In November 1996 the European Commission adopted a communication concerning the follow-up to the Green Paper on copyright and related rights in the information society. The proposed Directive aims at transposing into Community law the main international obligations arising from the two treaties on copyright and related rights adopted within the framework of the WIPO in December 1996 (WIPO Performances and Phonogram Treaty and WIPO Copyright Treaty). It applies to provisions relating to:

- the legal protection of computer programs

- rental right, lending right and certain rights related to copyright in the field of intellectual property

- copyright and related rights applicable to broadcasting of programs by satellite and cable retransmission

- the term of protection of copyright and certain related rights

- the legal protection of databases

The proposal was first presented by the Commission in January 1998, amended in May 1999 and currently is at second reading before the Parliament. Final adoption of the Directive could take place at the end of 2000 or the beginning of 2001 respectively.

A full-text version for download (pdf file) of the amended proposal for a Directive on copyright and related rights in the Information Society is available on the website of the European Commission (DG Internal Market): http://www.europa.eu.int/comm/internal_market/en/intprop/intprop/docs/index.htm

General critique concerning the proposed EU Directive includes:

- Open networks
The new law could require (technological) surveillance of communications to ensure enforcement. Also because Service Providers might be legally liable for transmitting unauthorized copies, the might in turn have to deny access to anybody who could not provide them with financial guaranties or insurance.

- Interoperable systems
The draft could negate the already established right in EU law for software firms to make their systems interoperable with the dominant copyright protected systems. This would be a threat to the democratic and economic rights of users.

- Publicly available information
It is yet unclear whether new legal protections against the bypassing of conditional access technology apply only for content with an exclusive right. If the content is already in the public domain, then there can be no possible violation of copyright law just from gaining access to it.

Comments from the library, archives and documentation community on the amended Directive embrace:

The Library Association
http://www.la-hq.org.uk/directory/prof_issues/dcrris2.html

EBLIDA (European Bureau of Library, Information and Documentation Associations)
http://www.eblida.org/lobby/position/ampos2fi.htm

Society of Archivists (U.K.) and Public Record Office (U.K.)
http://www.pro.gov.uk/about/copyright/copyrightdraft.htm

EFPICC (European Fair Practices In Copyright Campaign) http://www.eblida.org/efpicc/comments.htm

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Copyright Management and Control Systems: Pre-Infringement

Pre-infringement copyright management and control systems that inhibit or control infringement of intellectual property may be put into place by copyright owners before distributing their works. Examples are:

Contracts

Contracts are a pre-infringement control method, which very often is underestimated. Properly formed contracts enable copyright holders to restrict the use of their works in excess of the rights granted under copyright laws.

Copy Protection

This approach was standard in the 1980s, but rejected by consumers and relatively easy to break. Still copy protection, whereby the vendor limits the number of times a file can be copied, is used in certain situations.

Limited Functionality

This method allows copyright owners to provide a copy of the work, which is functionally limited. Software creators, for example, can distribute software that cannot print or save. A fully functional version has to be bought from the vendor.

Date Bombs

Here the intellectual property holder distributes a fully functional copy but locks off access at a pre-specified date or after a certain number of uses.

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Neural network

A bottom-up artificial intelligence approach, a neural network is a network of many very simple processors ("units" or "neurons"), each possibly having a (small amount of) local memory. The units are connected by unidirectional communication channels ("connections"), which carry numeric data. The units operate only on their local data and on the inputs they receive via the connections. A neural network is a processing device, either an algorithm, or actual hardware, whose design was inspired by the design and functioning of animal brains and components thereof. Most neural networks have some sort of "training" rule whereby the weights of connections are adjusted on the basis of presented patterns. In other words, neural networks "learn" from examples and exhibit some structural capability for generalization.

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Artificial intelligence approaches

Looking for ways to create intelligent machines, the field of artificial intelligence (AI) has split into several different approaches based on the opinions about the most promising methods and theories. The two basic AI approaches are: bottom-up and top-down. The bottom-up theory suggests that the best way to achieve artificial intelligence is to build electronic replicas of the human brain's complex network of neurons (through neural networks and parallel computing) while the top-down approach attempts to mimic the brain's behavior with computer programs (for example expert systems).

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Enigma

Device used by the German military command to encode strategic messages before and during World War II. The Enigma code was broken by a British intelligence system known as Ultra.

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General Motors

American corporation that was the world's largest automotive manufacturer and perhaps the largest industrial corporation throughout most of the 20th century. It was founded in 1908 to consolidate several motorcar companies and today operates manufacturing and assembly plants and distribution centers throughout the United States and Canada and many other countries. Its major products include automobiles and trucks, a wide range of automotive components, engines, and defense and aerospace material. In 1996 it sold Electronic Data Systems, and in 1997 it sold the defense units of its Hughes Electronics subsidiary to the Raytheon Company, thus leaving the computer-services and defense-aerospace fields in order to concentrate on its automotive businesses. The company's headquarters are in Detroit, Michigan.

INDEXCARD, 4/23
 
General Electric

GE is a major American corporation and one of the largest and most diversified corporations in the world. Its products include electrical and electronic equipment, plastics, aircraft engines, medical imaging equipment, and financial services. The company was incorporated in 1892, and in 1986 GE purchased the RCA Corporation including the RCA-owned television network, the National Broadcasting Company, Inc. In 1987, however, GE sold RCA's consumer electronics division to Thomson SA, a state-owned French firm, and purchased Thomson's medical technology division. In 1989 GE agreed to combine its European business interests in appliances, medical systems, electrical distribution, and power systems with the unrelated British corporation General Electric Company. Headquarters are in Fairfield, Conn., U.S.

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CIA

CIA's mission is to support the President, the National Security Council, and all officials who make and execute U.S. national security policy by: Providing accurate, comprehensive, and timely foreign intelligence on national security topics; Conducting counterintelligence activities, special activities, and other functions related to foreign intelligence and national security, as directed by the President. To accomplish its mission, the CIA engages in research, development, and deployment of high-leverage technology for intelligence purposes. As a separate agency, CIA serves as an independent source of analysis on topics of concern and works closely with the other organizations in the Intelligence Community to ensure that the intelligence consumer--whether Washington policymaker or battlefield commander--receives the adaequate intelligence information.

http://www.cia.gov

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Aeneas Tacticus

Supposedly his real name was Aeneas of Stymphalus. He was a Greek military scientist and cryptographer. He invented an optical system for communication similar to a telegraph: the water-clocks.

INDEXCARD, 7/23
 
atbash

Atbash is regarded as the simplest way of encryption. It is nothing else than a reverse-alphabet. a=z, b= y, c=x and so on. Many different nations used it in the early times of writing.

for further explanations see:
http://www.ftech.net/~monark/crypto/crypt/atbash.htm

http://www.ftech.net/~monark/crypto/crypt/atb...
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Framing

Framing is the practice of creating a frame or window within a web page where the content of a different web page can be display. Usually when a link is clicked on, the new web page is presented with the reminders of the originating page.

INDEXCARD, 9/23
 
Mark

A mark (trademark or service mark) is "... a sign, or a combination of signs, capable of distinguishing the goods or services of one undertaking from those of other undertakings. The sign may particularly consist of one or more distinctive words, letters, numbers, drawings or pictures, emblems, colors or combinations of colors, or may be three-dimensional..." (WIPO) To be protected a mark must be registered in a government office whereby generally the duration is limited in time, but can be periodically (usually every 10 years) renewed.

INDEXCARD, 10/23
 
T. Matthew Ciolek, Global Networking: A Timeline

This document, intended as a reliable electronic reference tool, provides a timeline for three types of developments and milestones: (1) advances in long distance person-to-person communication; (2) advances in storage, replication, cataloguing, finding, and retrieval of data; and (3) standardization of concepts and tools for long distance interaction.

The advancements may have a technical (hardware), conceptual (software), or an organizational aspect, or represent an important milestone in the history of a given invention, and are annotated as such in the timeline.

The period covered ranges from 30000 BC up to now.

http://www.ciolek.com/PAPERS/milestones.html

INDEXCARD, 11/23
 
Leonard M. Adleman

Leonard M. Adleman was one of three persons in a team to invent the RSA public-key cryptosystem. The co-authors were Adi Shamir and Ron Rivest.

INDEXCARD, 12/23
 
Polybius

Polybius was one of the greatest historians of the ancient Greek. he lived from 200-118 BC. see: Polybius Checkerboard.

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Bandwidth

The bandwidth of a transmitted communications signal is a measure of the range of frequencies the signal occupies. The term is also used in reference to the frequency-response characteristics of a communications receiving system. All transmitted signals, whether analog or digital, have a certain bandwidth. The same is true of receiving systems.

Generally speaking, bandwidth is directly proportional to the amount of data transmitted or received per unit time. In a qualitative sense, bandwidth is proportional to the complexity of the data for a given level of system performance. For example, it takes more bandwidth to download a photograph in one second than it takes to download a page of text in one second. Large sound files, computer programs, and animated videos require still more bandwidth for acceptable system performance. Virtual reality (VR) and full-length three-dimensional audio/visual presentations require the most bandwidth of all.

In digital systems, bandwidth is data speed in bits per second (bps).

Source: Whatis.com

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Walter Benjamin

The German philosopher Walter Benjamin (1892-1940) and author believed in the duty to educate people (including children) politically. In the German radio he had a series where he tried to do this. These texts are most important for Radio work - even today. Still he is more famous for his critiques on literature and art. Benjamin immigrated to Paris in 1934 and killed himself in 1940 at the boarder between Spain and France as he was afraid to get caught by German troops.

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Friedrich Kittler, The History of Communication Media

In this essay, Friedrich Kittler, one of the world's leading media theorists and media historicist, offers a concise and fascinating history of communication technologies in general terms from its beginnings up to now, provoking new insights by showing interesting interdependencies.

http://www.ctheory.com/ga1.14.html

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Archbishop Oscar Arnulfo Romero

Archbishop Oscar Arnulfo Romero († 1980) was elected archbishop because he was very conservative. But when he saw how more and more priests and definitely innocent people were murdered, he changed his attitudes and became one of the sharpest critics of the government. He gave shelter to those in danger, never stopped talking against violence and his Sunday sermons on the radio where moments to tell the truth to the Salvadorians, also mentioning the names of the disappeared or killed persons. As Romero got extremely popular and dangerous for the population he was killed by death squads, while reading a sermon.

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John Dee

b. July 13, 1527, London, England
d. December 1608, Mortlake, Surrey

English alchemist, astrologer, and mathematician who contributed greatly to the revival of interest in mathematics in England. After lecturing and studying on the European continent between 1547 and 1550, Dee returned to England in 1551 and was granted a pension by the government. He became astrologer to the queen, Mary Tudor, and shortly thereafter was imprisoned for being a magician but was released in 1555. Dee later toured Poland and Bohemia (1583-89), giving exhibitions of magic at the courts of various princes. He became warden of Manchester College in 1595.

INDEXCARD, 18/23
 
cryptoanalysis

the study of breaking others' codes to transform a message back into a legible form without knowing the key from the beginning

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codes

an algorithm for bringing a legible message into an illegible form. There has to exist some sort of code book to encode/decode it.

INDEXCARD, 20/23
 
Telephone

The telephone was not invented by Alexander Graham Bell, as is widely held to be true, but by Philipp Reiss, a German teacher. When he demonstrated his invention to important German professors in 1861, it was not enthusiastically greeted. Because of this dismissal, no financial support for further development was provided to him.

And here Bell comes in: In 1876 he successfully filed a patent for the telephone. Soon afterwards he established the first telephone company.

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Galileo Galilee

Galileo Galilee (1564-1642), the Italian Mathematician and Physicist is called the father of Enlightenment. He proofed the laws of the free fall, improved the technique for the telescope and so on. Galilee is still famous for his fights against the Catholic Church. He published his writings in Italian instead of writing in Latin. Like this, everybody could understand him, which made him popular. As he did not stop talking about the world as a ball (the Heliocentric World System) instead of a disk, the Inquisition put him on trial twice and forbid him to go on working on his experiments.

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Roman smoke telegraph network, 150 A.D.

The Roman smoke signals network consisted of towers within visible range of each other and had a total length of about 4500 kilometers. It was used for military signaling.

For a similar telegraph network in ancient Greece see Aeneas Tacitus' optical communication system.

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