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Unit 1: The Global Tapestry Unit 2: Networks of Exchange Period 2 – c. 1450 to c. 1750; Unit 3: Land-Based Empires Unit 4: Transoceanic Interconnections Period 3 – c. 1750 to c. 1900; Unit 5: Revolutions Unit 6: Consequences of Industrialization. Period 4 – c. 1900 to the present; Unit 7: Global Conflict Unit 8: Cold War and Decolonization
A fixed link or fixed crossing is a permanent, unbroken road or rail connection across water that uses some combination of bridges, tunnels, and causeways and does not involve intermittent connections such as drawbridges or ferries. [1] A bridge–tunnel combination is commonly used for major fixed links.
Reenactment of a Viking landing in L'Anse aux Meadows. Pre-Columbian transoceanic contact theories are speculative theories which propose that visits to the Americas, interactions with the Indigenous peoples of the Americas, or both, were made by people from elsewhere prior to Christopher Columbus's first voyage to the Caribbean in 1492. [1]
When the first transatlantic telegraph cable was laid in 1858 by Cyrus West Field, it operated for only three weeks; a subsequent attempt in 1866 was more successful. [citation needed] On July 13, 1866 the cable laying ship Great Eastern sailed out of Valentia Island, Ireland and on July 27 landed at Heart's Content in Newfoundland, completing the first lasting connection across the Atlantic.
In the 1960s, transoceanic cables were coaxial cables that transmitted frequency-multiplexed voiceband signals. A high-voltage direct current on the inner conductor powered repeaters (two-way amplifiers placed at intervals along the cable). The first-generation repeaters remain among the most reliable vacuum tube amplifiers ever designed. [33]
Ivan Gladstone Van Sertima (26 January 1935 – 25 May 2009) was a Guyanese-born British associate professor of Africana Studies at Rutgers University in the United States. [1]
Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.
Review (Fernand Braudel Center) 24#4 (2001): 473–513. online; Irigoin, Alejandra. "The end of a silver era: the consequences of the breakdown of the Spanish peso standard in China and the United States, 1780s–1850s." Journal of World History 20.2 (2009): 207–244. excerpt; Irigoin, Alejandra. "Rise and demise of the global silver standard."