Scientific discoveries, political developments, collective visions and individual conceptions or misconceptions will play an important part in this rally, and it will be the task to find out to what extent each of them contributed to the future development. .
The idea of wireless communication is astonishingly old. Leaving away ancient practices like e.g. communication by smoke clouds, which is obviously wireless, too, the speculations about wireless communication started at the latest around the middle of the 19th century. They were, at that time, not about electromagnetic waves, which had not been discovered yet, but about a different physical principle, the one of conduction, which could be used and indeed was used to transmit signals from A to B without wiring.
The first person to suggest transatlantic wireless telegraphy apparently was James Bowman Lindsay, who speculated about it as early as 1845. His idea was to combine the two conductive principles. He developed a system that was presented to the public in Dundee in 1853 and on which he received a patent in 1854. The patent described his invention as .
"a mode of transmitting telegraphic messages by means of electricity or magnetism through and across water without submerged wires, the water being made available as the connecting and conducting medium". .
The Second Invention of Wireless.
The idea of wireless communication was in the air, or rather in the water, for quite a while before Hertz's discovery of the electromagnetic waves that were already predicted by James Clerk Maxwell in 1864.
The idea of antenna seems to be older than electromagnetism: In a patent given in 1872 the American dentist Mahlon Loomis describes an apparatus which uses the atmosphere as a conductive medium. His idea was to .
"Erect suitable towers and apparatus to attract the electricity and thus obtain a current of electricity or shocks or pulsations which traverse the atmosphere between two given points by connecting it to the negative electrical body of the earth below".
1. What is the difference between Mesh, Bus, Ring and Star topologies? Bus topology advantages are the cable is inexpensive, simple to understand and easily to extend. Bus disadvantages are difficult to troubleshoot, increase network traffic decrease network performance and limited physical length. ...
What is History? So, what is History? When I told someone I was giving a talk on History and what it is, they said, "and you only have an hour?" No doubt everyone in this room has some idea of what History is, or isn't. So let's get started and see how far we can get with my highly selective ...
What is World History? World history is the study of the ways in which the world changes over time. ... This examination of interactions between these distant regions is what is meant by the term World History. ... One reason is that the United States has supported numerous nations throughout history in times of trouble. ... By studying World History one can find the origins of the Muslim religion with Muhammad. ...
Introduction: A global wireless protocol specification to work across heterogeneous wireless network technologies and is a communications standard for digital mobile phones, supported by over 1,200 companies is defined by Wireless application Protocol (WAP). WAP makes it possible for mobile phones...
Abstract This essay contains a few reasons of how history as a discipline is beneficial to society and the purpose history overall. Also how a journal I so important especially for a subject like history. As well as using History of California journal as an example on how a history journal works and the contents. ... There is a sense of Identity that comes with learning history. ... The saying "knowledge is power " really comes into play with history. ...
Sacred history can be defined as a history that is spread by the word of mouth, by oral teachings as opposed to written works. ... Sacred history can be defined as a history that is spread and kept by the word of mouth, by oral teachings. ... This would make the text then sacred history as well. ... Sacred history is different from scientific history for two main reasons. ... The second reason why sacred history differs from Thucydides theories of scientific history and ˜historical recurrence' is that Thucydides didn't believe in a divine intervention while sacred history usua...
The Oral Tradition:Sundiata: An Epic of Old Mali How Can A Historian Use Oral Tradition When Writing History Oral tradition is a history or a story passed down from generation to generation through word of mouth. The story is usually the history of a civilization or culture. ... Male griots tell the family history of the male side and females tell the female side. ... Writing traditions do consist in ancient history in Africa, but most Africans prefer the traditions of African storytelling and oral history. ... "Listen to my word, you who want to know; by my mouth you will learn the his...
One of the first recorded Bigfoot sightings was made by Leif Erikson when he discovered the New World nearly 500 years before Columbus. Erikson and his crew were the first Europeans to settle in North America and witness the creature that is now called Bigfoot. It was said that he saw more than one ...
"American History X" is undeniably one of the most poignant and potent movies I have ever seen. ... In "American History X" however, hate destroys the bond between two brothers. ... "American History X" gives us more closure. ... "American History X" has much stronger actors. ... In "American History X" however, we go beyond pity. ...
