Bjmc i-i, met, unit-iv, marconi, hertz and radio
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Arthur C. Clarke first suggested using satellites for communication in 1945, though it may have seemed outlandish at the time. In 1957, the Soviet Union launched Sputnik, the first satellite, demonstrating the viability of satellite technology. In 1962, the US launched Telstar, allowing live television broadcasts between the US and Europe, including coverage of John F. Kennedy's funeral. This inaugurated an era of global communication via satellite.
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History of radio
Radio has come a long way since its early discoveries and developments in the late 19th century. Key figures like Guglielmo Marconi and Edwin Howard Armstrong made important contributions to the technology through experiments transmitting radio waves and developing modulation techniques. By the 1920s, radio was being used commercially for telegraphy, telephony, and broadcasting news and entertainment programs, allowing it to become a popular mass medium. Further innovations in the following decades expanded its capabilities and applications.
History of radio
Guglielmo Marconi is considered the inventor of radio, building on earlier work with radio waves. In the late 1890s, Marconi transmitted the first radio signals and established the first radio factory in England. The radio allowed for wireless communication between soldiers and news/information to be transmitted, including the first radio link between Britain and France. While the Italian government rejected Marconi's initial proposal, his work established radio as an important communication technology.
Radio
The document traces the history and development of radio technology from early experiments in the late 19th century to its rise as a mass communication medium in the mid-20th century. Some key developments and events include Thomas Edison's early experiments in the 1870s, David Hughes transmitting radio waves in 1878, the invention of the coherer detector by Calzecchi-Onesti in 1884, and radio becoming a central part of American life and culture during the Golden Age of Radio from 1935-1950. Today, radio remains popular for listening to music and news while driving.
THE HISTORY OF RADIO
The document discusses the history of the radio and who invented it. It describes how many scientists contributed to early radio technology, including James Clerk Maxwell, Guglielmo Marconi, and Nikola Tesla. While Marconi was initially credited, Tesla had patented key radio technologies years earlier. The document also provides biographical details of Marconi and Tesla's contributions, with Marconi successfully transmitting the first radio signals across the English Channel, and Tesla inventing an early radio-controlled boat. Ultimately, the inventor of radio is still debated, though Tesla's patents were recognized by the US Supreme Court in 1943. In the early 20th century, radio was used mainly by soldiers for communication and to discuss scientific topics
The Telegraph, Part 1
- The document discusses the optical telegraph system invented by Claude Chappe in 1792 in France, which used a series of towers with movable arms to transmit messages over long distances without electricity.
- It describes how the French government initially denied but then provided funding for Chappe's system after the French Revolution in 1789 and France's entry into wars in the 1790s. The first messages were sent between Paris and Lille in 1794.
- The system allowed for faster communication than riders on horseback and helped the growing French nation-state integrate territories during the Napoleonic era, though the government forbade public use until 1850 and justified its huge costs for military purposes.
The Telegraph, Part 2
The document summarizes the history of the electrical telegraph, including key inventors and developments. It describes Wheatstone and Cooke demonstrating the first electric telegraph in England in 1837, connecting two stations of the Great Western Railway. It then discusses Samuel Morse inventing Morse code in the United States and building the first telegraph line between Baltimore and Washington D.C. in 1843. Finally, it briefly outlines the challenges of laying the first transatlantic telegraph cable between Ireland and Newfoundland in 1857.
A brief history of uk radio
The document provides a brief history of radio in the UK from its scientific origins in the 19th century to modern developments. Some key points include:
- Michael Faraday and others laid the scientific groundwork for radio in the 1800s, while Marconi is often credited with creating the first radio in the early 1900s.
- The Titanic disaster in 1912 demonstrated the importance of radio for distress calls.
- The BBC was formed in 1922 and began national radio broadcasting.
- The transistor radio was invented in 1954, ushering in a new era of portable radio.
- Pirate radio stations operated offshore in the 1960s to circumvent BBC's broadcasting monopoly.
- Radio 1 launched in 1967 to target younger
The history of radio new
The history of radio began with experiments in the 1830s but the first intentional electromagnetic wave was created in the 1880s. In the 1890s, many scientists like Hertz, Lodge, Popov and Tesla contributed to understanding electromagnetic waves and their potential for wireless communication. In 1894, Marconi built the first wireless telegraph system and went on to commercialize radio. In the early 20th century, radio technology advanced and the first radio broadcasts occurred in the 1920s led by the BBC. However, pirate radio stations on boats offshore gained popularity in the 1960s by appealing to younger audiences with new music formats not offered by the BBC.
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History of radio
Radio has come a long way since its early discoveries and developments in the late 19th century. Key figures like Guglielmo Marconi and Edwin Howard Armstrong made important contributions to the technology through experiments transmitting radio waves and developing modulation techniques. By the 1920s, radio was being used commercially for telegraphy, telephony, and broadcasting news and entertainment programs, allowing it to become a popular mass medium. Further innovations in the following decades expanded its capabilities and applications.
History of radio
Guglielmo Marconi is considered the inventor of radio, building on earlier work with radio waves. In the late 1890s, Marconi transmitted the first radio signals and established the first radio factory in England. The radio allowed for wireless communication between soldiers and news/information to be transmitted, including the first radio link between Britain and France. While the Italian government rejected Marconi's initial proposal, his work established radio as an important communication technology.
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The document traces the history and development of radio technology from early experiments in the late 19th century to its rise as a mass communication medium in the mid-20th century. Some key developments and events include Thomas Edison's early experiments in the 1870s, David Hughes transmitting radio waves in 1878, the invention of the coherer detector by Calzecchi-Onesti in 1884, and radio becoming a central part of American life and culture during the Golden Age of Radio from 1935-1950. Today, radio remains popular for listening to music and news while driving.
THE HISTORY OF RADIO
The document discusses the history of the radio and who invented it. It describes how many scientists contributed to early radio technology, including James Clerk Maxwell, Guglielmo Marconi, and Nikola Tesla. While Marconi was initially credited, Tesla had patented key radio technologies years earlier. The document also provides biographical details of Marconi and Tesla's contributions, with Marconi successfully transmitting the first radio signals across the English Channel, and Tesla inventing an early radio-controlled boat. Ultimately, the inventor of radio is still debated, though Tesla's patents were recognized by the US Supreme Court in 1943. In the early 20th century, radio was used mainly by soldiers for communication and to discuss scientific topics
The Telegraph, Part 1
- The document discusses the optical telegraph system invented by Claude Chappe in 1792 in France, which used a series of towers with movable arms to transmit messages over long distances without electricity.
- It describes how the French government initially denied but then provided funding for Chappe's system after the French Revolution in 1789 and France's entry into wars in the 1790s. The first messages were sent between Paris and Lille in 1794.
- The system allowed for faster communication than riders on horseback and helped the growing French nation-state integrate territories during the Napoleonic era, though the government forbade public use until 1850 and justified its huge costs for military purposes.
The Telegraph, Part 2
The document summarizes the history of the electrical telegraph, including key inventors and developments. It describes Wheatstone and Cooke demonstrating the first electric telegraph in England in 1837, connecting two stations of the Great Western Railway. It then discusses Samuel Morse inventing Morse code in the United States and building the first telegraph line between Baltimore and Washington D.C. in 1843. Finally, it briefly outlines the challenges of laying the first transatlantic telegraph cable between Ireland and Newfoundland in 1857.
A brief history of uk radio
The document provides a brief history of radio in the UK from its scientific origins in the 19th century to modern developments. Some key points include:
- Michael Faraday and others laid the scientific groundwork for radio in the 1800s, while Marconi is often credited with creating the first radio in the early 1900s.
- The Titanic disaster in 1912 demonstrated the importance of radio for distress calls.
- The BBC was formed in 1922 and began national radio broadcasting.
- The transistor radio was invented in 1954, ushering in a new era of portable radio.
- Pirate radio stations operated offshore in the 1960s to circumvent BBC's broadcasting monopoly.
- Radio 1 launched in 1967 to target younger
The history of radio new
The history of radio began with experiments in the 1830s but the first intentional electromagnetic wave was created in the 1880s. In the 1890s, many scientists like Hertz, Lodge, Popov and Tesla contributed to understanding electromagnetic waves and their potential for wireless communication. In 1894, Marconi built the first wireless telegraph system and went on to commercialize radio. In the early 20th century, radio technology advanced and the first radio broadcasts occurred in the 1920s led by the BBC. However, pirate radio stations on boats offshore gained popularity in the 1960s by appealing to younger audiences with new music formats not offered by the BBC.
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The birth of telecommunications was enabled by four key developments: 1) advances in electromagnetism science, 2) the ability to generate and store electricity, 3) the mechanical devices and infrastructure to transmit electricity, and 4) the creation of Morse code to translate electrical pulses into language. Together, these scientific and technological progressions allowed for the establishment of telegraph lines and marked the beginning of telecommunications.
History of telecommunication
Telecommunication has evolved greatly over time from early methods like drums and smoke signals to modern technologies. Early wired telecommunication systems included the optical telegraph, electrical telegraph, and telephones. Wireless technologies then emerged such as radio, mobile phones, and satellites that enabled telecommunication without wires. Important developments included the first transatlantic telegraph cable connecting Europe and North America, Alexander Graham Bell's invention of the telephone, and the launch of communication satellites that helped establish the internet and cellular networks that dominate telecommunication today.
The history of radio
The document summarizes the history of radio, beginning with Heinrich Hertz's discovery of radio waves in the late 1880s. It then discusses Guglielmo Marconi's pioneering work transmitting radio signals over long distances in the 1890s. By 1901, Marconi had sent the first transatlantic radio signal from Canada to Ireland. The document also briefly outlines the science behind how radio works and provides a timeline of major developments in radio, including the establishment of the BBC in the 1920s and the rise of pirate radio stations in the 1960s-1970s.
History of radio
The history of radio is traced through the lives of several inventors and engineers. Maxwell unified electric and magnetic theory and predicted electromagnetic waves. Hertz experimentally verified Maxwell's theories and generated and transmitted radio waves. Marconi improved Hertz's apparatus and used it for radio telegraphy, helping to commercialize radio. Their work laid the foundation for inventions like the vacuum tube, feedback amplifier, FM radio, and electronic television that expanded radio's capabilities.
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Early forms of telecommunication involved smoke signals, drums, flags, and other non-electronic methods. Modern telecommunication relies on electronic devices like the telephone, television, radio, and computers to transmit signals over long distances. Some pioneering inventors in the field include Alexander Graham Bell, Guglielmo Marconi, and John Logie Baird. Telecommunication is now a major global industry worth an estimated $1.2 trillion in 2006.
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The radio was the first device that enabled mass communication across long distances both nationally and internationally. Its development began in 1893 with Nikolai Tesla's demonstration of wireless communication, while Guglielmo Marconi is most associated with patenting the radio in 1896. Early radios were mainly used by ships at sea to maintain contact, only able to transmit Morse code messages. The BBC was founded in 1922 as one of the first radio broadcasting stations, airing plays, music and variety programs across the UK. Over time, radio evolved into its more modern form and became a primary means of communication and entertainment in many countries.
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- It discusses early pioneers of radio including Hertz, Branly, Tesla, Bose and their experiments transmitting radio waves wirelessly. Marconi is noted for establishing the first commercial radio telegraph system in the late 1890s. However, the invention of radio involved contributions from many scientists over decades.
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The document discusses the history and development of television from its early inventors in the 1920s through its establishment as a widespread technology and cultural force by the 1950s. It touches on key inventors and innovations like the cathode ray tube, iconoscope, kinescope, and fiber optic cable. Regulations and the role of the FCC in establishing broadcast standards are also summarized.
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This document summarizes the history of radio technology and applications from the 1800s to 1950. It describes key developments such as Marconi transmitting the first long-distance wireless telegraph messages in the late 1800s, Fessenden broadcasting the first radio programming including music and voice in 1906, and Armstrong inventing FM radio in the 1930s. It also discusses the establishment of regulations and organizations like the Federal Radio Commission and FCC to oversee radio licensing and usage in the early 20th century. By the 1940s, most families owned a radio and listened for several hours daily, though the rise of affordable television began radio's decline into a mostly music-based format.
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Radio developed from earlier inventions like the telegraph and telephone using electromagnetic waves to transmit audio such as music and speech without wires. Key developments included Maxwell and Hertz's work establishing the existence of radio waves in the 1860s-1880s, Marconi's successful transatlantic radio transmission in 1901, and Armstrong's invention of FM radio in 1933 which improved audio quality. Radio broadcasting began in the early 1920s and grew rapidly that decade as more people purchased receivers. However, the lack of regulation led to interference issues until the Federal Radio Commission was established in 1926 to bring order. Radio has since been used for various purposes like education, news, entertainment and more, becoming an important mass medium.
early radio history
Radio broadcasting debuted in the early 20th century and grew rapidly through the 1930s-1950s, becoming a major source of entertainment and news. Technological advances in the late 19th century led to the development of radio. Guglielmo Marconi transmitted the first radio signal across the Atlantic in 1901. The first radio voice broadcast occurred in 1906. By the 1920s-1930s, radio stations proliferated and radio ownership expanded greatly. Networks emerged providing programming. Radio faced competition from television in the 1950s, but adapted through portable radios, new formats like top 40, and focusing on news and information.
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History of radio 1
The radio was invented in the 1890s by Guglielmo Marconi. The BBC was formed in 1922 and originally had a monopoly over radio broadcasting in the UK. Over time, competition emerged from television, deregulation allowed commercial radio stations, and the internet has further expanded access to radio. Today there are over 800 radio stations in the UK, including the BBC's 10 national stations, regional stations, and local stations as well as numerous commercial options.
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The document provides a history of radio from its discovery by Heinrich Hertz in 1888 to its current and future states. It traces the key developments from Hertz's discovery of radio waves to Marconi's experiments with wireless telegraphy. By the 1920s, commercial radio broadcasts were transmitting information, music, and comedy to widespread audiences. The radio has since evolved with technologies like XM radio while maintaining its role as a mobile source of information and entertainment, currently listened to by 94% of Americans. Questions remain around radio's future as technologies like smart phones integrate its functions.
Television
Early television development followed two paths - mechanical systems using rotating disks invented by Paul Gottlieb Nipkow and electronic systems using cathode ray tubes. While mechanical TV systems were first, electronic TV systems using devices like Vladimir Zworykin's improved cathode ray tube called the kinescope eventually replaced mechanical systems due to better performance. Pioneers like John Logie Baird and Zworykin built upon early innovations to demonstrate rudimentary television systems. Color TV technology was proposed as early as 1904 but commercial broadcasting in the US began in 1953 using an electronic system invented by RCA. Remote controls were introduced in 1950 with Zenith's "Lazy Bones" device.
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The inventions of telegraph and telephone
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The birth of telecommunications was enabled by four key developments: 1) advances in electromagnetism science, 2) the ability to generate and store electricity, 3) the mechanical devices and infrastructure to transmit electricity, and 4) the creation of Morse code to translate electrical pulses into language. Together, these scientific and technological progressions allowed for the establishment of telegraph lines and marked the beginning of telecommunications.
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Telecommunication has evolved greatly over time from early methods like drums and smoke signals to modern technologies. Early wired telecommunication systems included the optical telegraph, electrical telegraph, and telephones. Wireless technologies then emerged such as radio, mobile phones, and satellites that enabled telecommunication without wires. Important developments included the first transatlantic telegraph cable connecting Europe and North America, Alexander Graham Bell's invention of the telephone, and the launch of communication satellites that helped establish the internet and cellular networks that dominate telecommunication today.
The history of radio
The document summarizes the history of radio, beginning with Heinrich Hertz's discovery of radio waves in the late 1880s. It then discusses Guglielmo Marconi's pioneering work transmitting radio signals over long distances in the 1890s. By 1901, Marconi had sent the first transatlantic radio signal from Canada to Ireland. The document also briefly outlines the science behind how radio works and provides a timeline of major developments in radio, including the establishment of the BBC in the 1920s and the rise of pirate radio stations in the 1960s-1970s.
History of radio
The history of radio is traced through the lives of several inventors and engineers. Maxwell unified electric and magnetic theory and predicted electromagnetic waves. Hertz experimentally verified Maxwell's theories and generated and transmitted radio waves. Marconi improved Hertz's apparatus and used it for radio telegraphy, helping to commercialize radio. Their work laid the foundation for inventions like the vacuum tube, feedback amplifier, FM radio, and electronic television that expanded radio's capabilities.
A brief history of Telecommunications By Tavo92
Early forms of telecommunication involved smoke signals, drums, flags, and other non-electronic methods. Modern telecommunication relies on electronic devices like the telephone, television, radio, and computers to transmit signals over long distances. Some pioneering inventors in the field include Alexander Graham Bell, Guglielmo Marconi, and John Logie Baird. Telecommunication is now a major global industry worth an estimated $1.2 trillion in 2006.
The History Of Telecommunication
The history of telecommunication illustrates this never-ending push for progress as it steadily parallels human growth, becoming more widespread and efficient as the development of modern civilization unfolds
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The radio was the first device that enabled mass communication across long distances both nationally and internationally. Its development began in 1893 with Nikolai Tesla's demonstration of wireless communication, while Guglielmo Marconi is most associated with patenting the radio in 1896. Early radios were mainly used by ships at sea to maintain contact, only able to transmit Morse code messages. The BBC was founded in 1922 as one of the first radio broadcasting stations, airing plays, music and variety programs across the UK. Over time, radio evolved into its more modern form and became a primary means of communication and entertainment in many countries.
Orgeron Chapter 1 TV History part 1 (MS)
The document discusses the history and development of television production. It explains that persistence of vision, the phenomenon where the brain retains images longer than the eye sees them, enabled the creation of early viewing machines and led photographers like Muybridge to capture sequential images to study motion. This revealed that a galloping horse briefly has all four feet off the ground. Engineers and inventors like Farnsworth and Zworykin then worked on cathode ray tubes and electronic television, with Farnsworth transmitting the first television image in 1927 and winning a patent battle against RCA led by Zworykin.
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- It discusses early pioneers of radio including Hertz, Branly, Tesla, Bose and their experiments transmitting radio waves wirelessly. Marconi is noted for establishing the first commercial radio telegraph system in the late 1890s. However, the invention of radio involved contributions from many scientists over decades.
Television
The document discusses the history and development of television from its early inventors in the 1920s through its establishment as a widespread technology and cultural force by the 1950s. It touches on key inventors and innovations like the cathode ray tube, iconoscope, kinescope, and fiber optic cable. Regulations and the role of the FCC in establishing broadcast standards are also summarized.
History of Early Radio Technology
This document summarizes the history of radio technology and applications from the 1800s to 1950. It describes key developments such as Marconi transmitting the first long-distance wireless telegraph messages in the late 1800s, Fessenden broadcasting the first radio programming including music and voice in 1906, and Armstrong inventing FM radio in the 1930s. It also discusses the establishment of regulations and organizations like the Federal Radio Commission and FCC to oversee radio licensing and usage in the early 20th century. By the 1940s, most families owned a radio and listened for several hours daily, though the rise of affordable television began radio's decline into a mostly music-based format.
Radio
Radio developed from earlier inventions like the telegraph and telephone using electromagnetic waves to transmit audio such as music and speech without wires. Key developments included Maxwell and Hertz's work establishing the existence of radio waves in the 1860s-1880s, Marconi's successful transatlantic radio transmission in 1901, and Armstrong's invention of FM radio in 1933 which improved audio quality. Radio broadcasting began in the early 1920s and grew rapidly that decade as more people purchased receivers. However, the lack of regulation led to interference issues until the Federal Radio Commission was established in 1926 to bring order. Radio has since been used for various purposes like education, news, entertainment and more, becoming an important mass medium.
early radio history
Radio broadcasting debuted in the early 20th century and grew rapidly through the 1930s-1950s, becoming a major source of entertainment and news. Technological advances in the late 19th century led to the development of radio. Guglielmo Marconi transmitted the first radio signal across the Atlantic in 1901. The first radio voice broadcast occurred in 1906. By the 1920s-1930s, radio stations proliferated and radio ownership expanded greatly. Networks emerged providing programming. Radio faced competition from television in the 1950s, but adapted through portable radios, new formats like top 40, and focusing on news and information.
10 Facts About the Telecommunications Industry, from Richard Horowitz
You may not consider the telecommunications industry to be very exciting, but it actually has a pretty interesting history and has had a huge impact on modern day society. I recently came across an great article that shares some fun telecommunications facts, that I thought would be good to share:
History of radio 1
The radio was invented in the 1890s by Guglielmo Marconi. The BBC was formed in 1922 and originally had a monopoly over radio broadcasting in the UK. Over time, competition emerged from television, deregulation allowed commercial radio stations, and the internet has further expanded access to radio. Today there are over 800 radio stations in the UK, including the BBC's 10 national stations, regional stations, and local stations as well as numerous commercial options.
Telecommunications and its history pamela
The document discusses the history of telecommunications from smoke signals to modern electrical systems, defines key terms like telecommunication, bandwidth, satellites, and orbits. It also explores topics like the internet, web 2.0, communication satellites, and meteorology including weather forecasting and its importance in prediction and prevention of natural disasters.
The radio
The document provides a history of radio from its discovery by Heinrich Hertz in 1888 to its current and future states. It traces the key developments from Hertz's discovery of radio waves to Marconi's experiments with wireless telegraphy. By the 1920s, commercial radio broadcasts were transmitting information, music, and comedy to widespread audiences. The radio has since evolved with technologies like XM radio while maintaining its role as a mobile source of information and entertainment, currently listened to by 94% of Americans. Questions remain around radio's future as technologies like smart phones integrate its functions.
Television
Early television development followed two paths - mechanical systems using rotating disks invented by Paul Gottlieb Nipkow and electronic systems using cathode ray tubes. While mechanical TV systems were first, electronic TV systems using devices like Vladimir Zworykin's improved cathode ray tube called the kinescope eventually replaced mechanical systems due to better performance. Pioneers like John Logie Baird and Zworykin built upon early innovations to demonstrate rudimentary television systems. Color TV technology was proposed as early as 1904 but commercial broadcasting in the US began in 1953 using an electronic system invented by RCA. Remote controls were introduced in 1950 with Zenith's "Lazy Bones" device.
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This document provides an overview of abnormal psychology and perspectives on defining mental disorder. It discusses defining mental disorder based on statistical deviation, dysfunction, personal discomfort, maladaptive behavior, and norm/value violation. Challenges with each perspective are outlined. The DSM-IV definition emphasizes distress, disability, or increased risk. Cross-cultural issues are also reviewed, depending on whether a biomedical or culturally-based view is taken of what constitutes disorder.
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Baroness Thompson completed mandated reporter training for educators on 09/03/2015 through an online course at www.mandatedreporterca.com. The training addressed California's requirements for certain professionals to report suspected child abuse or neglect. Baroness Thompson received certification for completing the mandated reporter educators training.
two step flow theory story
The two-step flow theory of mass communication asserts that information from media passes through two stages: first to opinion leaders who pay close attention to media messages, and then from opinion leaders to the broader public. Opinion leaders influence people's attitudes and behaviors by passing on both the actual media content as well as their own interpretations of it. The theory refined our understanding of how media influences decision-making compared to earlier views of direct effects, and helped explain why some media campaigns failed to change audiences. It was later succeeded by the multi-step flow theory.
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ITU has coordinated international telecommunications since 1865, beginning with telegraph networks and expanding to include telephone, radio, television, satellites, and the internet. ITU sets international standards and regulations to facilitate cooperation and interoperability as new technologies develop. ITU's role has grown from 20 founding members coordinating telegraph services to nearly 200 member states and 900 private sector entities working to connect the world and spread the benefits of communications technologies.
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The document provides a history of radio broadcasting, beginning with the discovery of radio waves in the 1860s by Scottish physicist James Clerk Maxwell and demonstrations by others in the late 1800s. Italian inventor Guglielmo Marconi sent the first radio signal across the English Channel in 1899 and the first transatlantic message in 1901. In the early 1900s, radiotelegraphy was developed for ship-to-shore communication. American inventor Lee de Forest developed the vacuum tube amplifier and AM radio in the early 1900s. The first radio broadcast occurred in the US in 1920. Frequency modulation (FM) radio was invented in 1933. Existing laws in the Philippines govern radio broadcasting and provide franchises for radio stations.
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The document summarizes the development of the telegraph network in the Victorian era, known as the "Victorian Internet". Key events included:
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2) By the early 1870s, a global network of undersea cables, land lines, pneumatic tubes, and messengers had emerged to transmit messages worldwide within hours.
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This document discusses the history and evolution of radio from its origins to modern times. It begins with the discovery of electromagnetic waves and the initial development of radiotelegraph technology in the late 19th/early 20th century. It then covers radio's growth as an entertainment and news medium in the 1920s-1940s, known as the Golden Age of Radio. The document also discusses the rise of television's influence in the 1950s, the growth of FM and public radio in the 1960s-1970s, and radio's role today.
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The document summarizes 10 of the most influential inventions of the 20th century, including nuclear power, submarines, rockets, antibiotics, radio, television, airplanes, automobiles, computers, and the Internet. Nuclear power was first used to generate electricity in 1951. Submarines were revolutionized by John Philip Holland's use of internal combustion engines. Rockets were pioneered by Konstantin Tsiolkovsky for space exploration. Alexander Fleming accidentally discovered penicillin in 1928. Radio was developed for wireless communication by Marconi in the 1890s. Television was first publicly demonstrated by John Baird in 1925. The Wright Brothers achieved the first powered flight in 1903. Cars became accessible to the masses through Henry Ford's
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A brief look at the inventions that played a major role in developing the internet as an information sharing network.
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1) The document provides a history of radio, focusing on the development of mobile radio. It describes several pioneering scientists and inventors in radio including Hertz, Tesla, Alexanderson, Fessenden, and Armstrong.
2) It then discusses some of the first uses of mobile radio in the 1890s on ships and its adoption for aviation in 1910.
3) Mobile radio technology continued developing through the 1920s for police and military use and led to the cellular phone networks of today. The first commercial cellular networks launched in 1983.
Short history
1) The document provides a history of radio, focusing on the development of mobile radio. It describes several pioneering scientists and inventors in radio including Hertz, Tesla, Alexanderson, Fessenden, and Armstrong.
2) It discusses early uses of radio including wireless telegraphy on ships in the 1890s and the first transmissions from airplanes in 1910.
3) Mobile radio evolved from military radio telephones in WWI to the first commercial mobile radio system by Bell in 1946 and the invention of the handheld cellular phone by Motorola's Martin Cooper in 1973.
The history of radio
- The history of radio began with scientific discoveries in the late 19th century demonstrating that electromagnetic waves could be transmitted through space. This led to early experiments transmitting radio signals over short distances.
- Guglielmo Marconi built the first commercially successful wireless telegraph system in the 1890s and demonstrated early applications of radio in military communications.
- The BBC launched the first radio broadcast in the UK in 1922, establishing standards for radio broadcasting. As the only station allowed, it focused on news, discussions and classical music.
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California ppt
California led the way in many technological advancements in the late 19th and early 20th centuries, including developing the Pelton turbine which brought hydroelectric power to the state. The state also pioneered vacuum tube technology, flight and aviation, with the Montgomery brothers making the first powered flight in 1883. California shaped aviation and many famous aviation companies like Lockheed were founded there. The state also led in fields like astronomy, electronics, and biotechnology with inventions like the cyclotron and developments in semiconductors and the internet. California similarly shaped arts and culture, becoming the epicenter of the film industry and home to many famous writers that captured the state's natural beauty and social themes in their work.
California ppt
California led the way in many technological advancements in the late 19th and early 20th centuries, including developing the Pelton turbine which brought hydroelectric power to the state. The state also pioneered vacuum tube technology, flight and aviation, with the Montgomery brothers making the first powered flight in 1883. California shaped aviation and many famous aviation companies like Lockheed were founded there. The state also led in fields like astronomy, electronics, and biotechnology with inventions like the cyclotron and developments in semiconductors and the internet. California similarly shaped arts and culture, becoming the epicenter of the film industry and home to many famous writers that captured the state's natural beauty and social themes in their work.
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The document provides a history of radio, beginning with early pioneers in wireless communication like Marconi, Hertz, and Popov. It discusses the development of AM radio in the US in the 1920s and the establishment of the first radio networks by AT&T and RCA. By the 1940s, NBC, CBS and ABC had emerged as the dominant broadcast radio networks in the US. The document also outlines the growth of radio formats and ownership consolidation in the industry over time.
Chapter 5 Popular Radio and the Origins of Broadcasting
The document summarizes the history and development of radio technology from the late 19th century through the 1920s. Key points include:
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The document provides an overview of communication technologies across different eras:
1) Pre-industrial age: People used tools like papyrus, cave paintings, clay tablets, and codices to communicate and store information.
2) Industrial age: Technologies like the telephone, typewriter, newspaper, printing press, and telegraph emerged.
3) Electronic age: Inventions like the transistor, television, transistor radio, computers, and fax advanced communication.
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1. The document outlines different ages of communication technology - pre-industrial, industrial, electronic, and information age.
2. It provides examples of early communication technologies from each age, including cave paintings, clay tablets, the telegraph, telephone, television, and the internet.
3. The ages progressed from basic tools and writing systems to electronic devices and digital networks as technology advanced over thousands of years.
New Technology Lecture L11 Connecting People
The history of technology has many lessons on how technology trends evolve over time. Discoveries create opportunities for practical solutions. The foundation for electronic communication as we know today was laid in the 19th century. From 1820 to the turn of the century, innovators made experiments and discoveries.
Morse’s telegraph made Western Union big and powerful. The telegraph proved to be a disruptive technology that changed how wars were fought and how businesses were run. However, the telephone would also prove to be disruptive and destroyed the telegraph business.
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The document discusses the history of communications technologies such as the telegraph, wireless telegraphy, telephone, and radio. It describes how the sinking of the Titanic in 1912 highlighted the importance of wireless communication in saving lives at sea. It also discusses the development of radio broadcasting in the 1920s in the US, including how amateur operators influenced early radio and the shift to commercial radio networks supported by advertising.
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Rai University provides high quality education for MSc, Law, Mechanical Engineering, BBA, MSc, Computer Science, Microbiology, Hospital Management, Health Management and IT Engineering.
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Pengantar Penggunaan Flutter - Dart programming language1.pptx
Bjmc i-i, met, unit-iv, marconi, hertz and radio
- 1. MARCONI, HERTZ AND RADIO A page from Arthur C. Clarke’s article in Wireless World of 1945 in which he suggested the use of space relay stations for communications. Let us take a look at another scientific invention that has had a profound impact on the human race – satellites. Now-a-days it is commonplace for the use of satellites in weather observation, taking pictures of the earth to study its composition and most important in the field of communication. But when the suggestion to use space relay stations was first made by science fiction writer Arthur C. Clarke in 1945 it may have sounded outlandish to many people. But he did it keeping in mind the need for radio and television signals to be transmitted over large areas. He took into account the scientific knowledge with respect to rocketry available at that time. Naturally the Soviets would have known about all this when in 1957 when they launched the first satellite – Sputnik. The context may have changed and the Cold War may have been the driving forces behind the efforts of the Soviets and later in response of the Americans. In 1962 the Americans put the Telstar communication satellite in space. Now Europeans could view television programmes aired in the United States and vice versa. As a result, people in Europe watched the funeral of John F. Kennedy live. The next important even telecast across the globe was the Tokyo Olympics in 1964 that opened up a global audience for sports. With this came corporate sponsorship of sports with its boost to games and a flip side as well. There are however,a number of other path breaking inventions that transformed the face of communications. The first is the invention of the thermionic valve or tube brought the dawn of the age of electronics. Its invention enabled the wireless technology of the day to move forward. Many new and exciting applications were found for these devices, first as telephone repeater amplifiers and then many other applications that were not always linked to wireless and as a result the new area of electronics was born. Though the electronic effect had been noticed during the 19th century it was not until 1911 that the valve was used as an amplifier. After this discovery people were quick to try to exploit it. De Forest built an amplifier using three Audions and demonstrated it to the telephone company A.T & T. Although the performance was poor they saw its potential and soon started to build repeaters using valves which they had improved. What was the first demonstrable effect of the radio? The ocean liner, “Titanic” hit an iceberg and sank. The wireless distress call (63 k Wav spark transmitter) was heard 58 miles away by the liner “Carpathia”. Those who made it into lifeboats were rescued 3 1/2 hours later. There were 705 lives saved. In September of 1922 there are 537 stations broadcasting. Two frequencies are authorized for broadcasting...833 and 619 kc’s. A third frequency was added later in the year - 750 kc. Approx. 100,000 radio sets are produced in 1922. Radio prices begin to fall, as competition to market radio’s grows.WEAF in
- 2. New York is the first to offer air time to advertisers. It was August 28th, at 5:15 PM - an infomercial on the Hawthorne apartment complex in Queens. The Marconi Company starts ‘2LO’ in London - Britain’s first broadcasting station. US President Harding has a radio installed at the White House. The first Network broadcast was made,as WEAF, WJAR and WMAF are linked by phone. New radios became obsolete in 3 to 6 months time. Approx. 500,000 radio sets are produced this year. 1924 The present A.M. band is assigned. It spans 550 - 1550 kilocycles. President Coolidge’s cat is lost...and found with the help of Radio. Over 1400 stations are now broadcasting. It is estimated that over 3 million radio sets are in use in the United States. Baseball games are broadcast almost daily. New radio’s - superhets, reflex sets,TRF’s, and neutrodynes are much more complex, so a new industry begins to take shape - the radio repairman. Can you think of a technology that has become popular during the last 10 to 15 years and has had a deep impact on the way that we lead our lives? References- 1. Baran and Davis; Mass Communication Theory; (2000); Thomas-Wadsworth 2. Fiske; Introduction to Communication Studies; (1982) 3. Infante, Rance and Womack; Building Communication Theory, 2nd edition; (1993); 4. Berger; Media Analysis Techniques