Lee De Forest

Author : Mike Adams
Publisher : Springer Science & Business Media
Page : 562 pages
File Size : 40,8 Mb
Release : 2011-10-17
Category : Technology & Engineering
ISBN : 9781461404187

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Lee de Forest by Mike Adams Pdf

The life-long inventor, Lee de Forest invented the three-element vacuum tube used between 1906 and 1916 as a detector, amplifier, and oscillator of radio waves. Beginning in 1918 he began to develop a light valve, a device for writing and reading sound using light patterns. While he received many patents for his process, he was initially ignored by the film industry. In order to promote and demonstrate his process he made several hundred sound short films, he rented space for their showing; he sold the tickets and did the publicity to gain audiences for his invention. Lee de Forest officially brought sound to film in 1919. Lee De Forest: King of Radio, Television, and Film is about both invention and early film making; de Forest as the scientist and producer, director, and writer of the content. This book tells the story of de Forest’s contribution in changing the history of film through the incorporation of sound. The text includes primary source historical material, U.S. patents and richly-illustrated photos of Lee de Forest’s experiments. Readers will greatly benefit from an understanding of the transition from silent to audio motion pictures, the impact this had on the scientific community and the popular culture, as well as the economics of the entertainment industry.

Author : James A. Hijiya
Publisher : Lehigh University Press
Page : 190 pages
File Size : 47,5 Mb
Release : 1992
Category : Biography & Autobiography
ISBN : 0934223238

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Lee de Forest and the Fatherhood of Radio by James A. Hijiya Pdf

"This book is not so much an analysis of de Forest's contribution to technology as it is a chronicle of his spiritual quest. Lee de Forest was an important inventor, and this biography attempts to explain what moved him to become one. It tries to show how - in a universe from which deity had seemingly disappeared - de Forest's devotion to invention was part of his search for a new light. The book is not a study in the history of technology but in the history of the religion of technology." "In 1906, de Forest created the "Audion," the three-electrode vacuum tube, which became the foundation of the electronics industry for half a century. He was a pioneer in radio and talking pictures, and he worked on projects ranging from television to solar energy. Holder of more than three hundred patents, he was one of the most prolific inventors in American history." "But he was more than that. Lee de Forest had an immense curiosity that extended beyond science and engineering to politics, literature, and religion. His active and far-ranging mind became a register for many social and intellectual events during his long life: from Populism to McCarthyism, and from Darwinism to agnosticism. But while his interests were diverse, his vision was not. For him invention was not merely a vocation but a worldview. He represented a technological progressivism that advocated reform, but reform stemming less from social engineering than from real engineering. Although he favored certain improvements in law and education, he did not think that these would be the basis of social transformation. Instead, he believed that inventions - ranging from radios to war planes - would reform the human condition and that the future was more in the hands of inventors than statesmen. The millenium would be a technical innovation, with himself as one of its principal inventors." "As a young man, de Forest came to spurn conventional notions of an immortal soul; but he never ceased to seek ways to overcome death - not merely the physical death of the body but also the spiritual death of living without purpose. The fame of his inventions would, he hoped, keep him forever alive in the memory of posterity. Moreover, the good that his inventions did for humanity - his contribution to progress - would give meaning to his existence. For Lee de Forest, then, invention was a substitute for religion. By helping to build the future, he sought to become an indelible part of it."--BOOK JACKET.Title Summary field provided by Blackwell North America, Inc. All Rights Reserved

Author : Sungook Hong
Publisher : MIT Press
Page : 267 pages
File Size : 55,6 Mb
Release : 2010-01-22
Category : Technology & Engineering
ISBN : 9780262514194

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Wireless by Sungook Hong Pdf

A new look at the early history of wireless communication. By 1897 Guglielmo Marconi had transformed James Clerk Maxwell's theory of electromagnetic waves into a workable wireless telegraphy system, and by 1907 Lee de Forest had invented the Audion, a feedback amplifier and oscillator that opened the way to practical radio transmission. Fifteen years after Marconi's invention, wireless had become an essential means of communication, as well as a hobby for many. This book offers a new perspective on the early days of wireless communication. Drawing on previously untapped archival evidence and recent work in the history and sociology of science and technology, it examines the substance and context of both experimental and theoretical aspects of engineering and scientific practices in the first years of this technology. It offers new insights into the relationship between Marconi and his scientific advisor, the physicist John Ambrose Fleming (inventor of the vacuum tube). It includes the full story of the infamous 1903 incident in which Marconi's opponent Nevil Maskelyne interfered with Fleming's public demonstration of Marconi's syntonic (tuning) system at the Royal Institution by sending derogatory messages from his own transmitter. The analysis of the Maskelyne affair highlights the struggle between Marconi and his opponents, the efficacy of early syntonic devices, Fleming's role as a public witness to Marconi's private experiments, and the nature of Marconi's "shows." It also provides a rare case study of how the credibility of an engineer can be created, consumed, and suddenly destroyed. The book concludes with a discussion of de Forest's Audion and the shift from wireless telegraphy to radio.

Author : Tom Lewis
Publisher : Cornell University Press
Page : 446 pages
File Size : 55,8 Mb
Release : 2021-09-15
Category : Technology & Engineering
ISBN : 9781501759338

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Empire of the Air by Tom Lewis Pdf

Empire of the Air tells the story of three American visionaries—Lee de Forest, Edwin Howard Armstrong, and David Sarnoff—whose imagination and dreams turned a hobbyist's toy into radio, launching the modern communications age. Tom Lewis weaves the story of these men and their achievements into a richly detailed and moving narrative that spans the first half of the twentieth century, a time when the American romance with science and technology was at its peak. Empire of the Air is a tale of pioneers on the frontier of a new technology, of American entrepreneurial spirit, and of the tragic collision between inventor and corporation.

Author : Jessica J. Lee
Publisher : Catapult
Page : 305 pages
File Size : 51,5 Mb
Release : 2020-08-04
Category : Travel
ISBN : 9781646220007

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Two Trees Make a Forest by Jessica J. Lee Pdf

This "stunning journey through a country that is home to exhilarating natural wonders, and a scarring colonial past . . . makes breathtakingly clear the connection between nature and humanity, and offers a singular portrait of the complexities inherent to our ideas of identity, family, and love" (Refinery29). A chance discovery of letters written by her immigrant grandfather leads Jessica J. Lee to her ancestral homeland, Taiwan. There, she seeks his story while growing closer to the land he knew. Lee hikes mountains home to Formosan flamecrests, birds found nowhere else on earth, and swims in a lake of drowned cedars. She bikes flatlands where spoonbills alight by fish farms, and learns about a tree whose fruit can float in the ocean for years, awaiting landfall. Throughout, Lee unearths surprising parallels between the natural and human stories that have shaped her family and their beloved island. Joyously attentive to the natural world, Lee also turns a critical gaze upon colonialist explorers who mapped the land and named plants, relying on and often effacing the labor and knowledge of local communities. Two Trees Make a Forest is a genre–shattering book encompassing history, travel, nature, and memoir, an extraordinary narrative showing how geographical forces are interlaced with our family stories.

Author : Hugh G.J. Aitken
Publisher : Princeton University Press
Page : 608 pages
File Size : 52,7 Mb
Release : 2014-07-14
Category : Science
ISBN : 9781400854608

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The Continuous Wave by Hugh G.J. Aitken Pdf

Hugh Aitken describes a critical period in the history of radio, when continuous wave technology first made reliable long-distance wireless communication possible and opened up opportunities for broadcasting voice and music. Originally published in 1985. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Author : William Gurstelle
Publisher : Maker Media, Inc.
Page : 339 pages
File Size : 44,5 Mb
Release : 2017-02-23
Category : Technology & Engineering
ISBN : 9781680450682

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ReMaking History, Volume 3 by William Gurstelle Pdf

Makers of the Modern World is the third volume of William Gurstelle's unique, hands-on journey through history. Each chapter examines a remarkable character from the past, one of the people whose insights and inventions helped create our modern world. What sets this series apart from other history books - including other histories of technology - is that each chapter also includes step-by-step instructions for making your own version of the historical invention. History comes to life in a way you have never experienced before when you follow the inventors' steps and recreate the groundbreaking devices of the past with your own hands. This volume brings you to the early modern era and the invention of the electric light, the movie projector, and the automobile. Inside, you will discover: Alessandro Volta and Electroplating Humphrey Davy and the First Electric light George Cayley and the Aeronautical Glider The Lumiere Brothers and the Movie Projector Rudolf Diesel and the Automobile Engine Hans Goldschmidt and the Thermite Reaction August Mobius and the Mobius Strip Louis Poinsot's Loads, Moments, and Torques Be sure to also check out ReMaking History, Volume 1: Early Makers and ReMaking History Volume 2 :Industrial Revolutionaries.

Author : Sloan De Forest
Publisher : Running Press Adult
Page : 264 pages
File Size : 54,9 Mb
Release : 2018-05-01
Category : Performing Arts
ISBN : 9780762491537

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Must-See Sci-fi by Sloan De Forest Pdf

Spanning nine decades and branded by the most trusted authority on film, Turner Classic Movies: Must-See Sci-Fi showcases 50 of the most shocking, weird, wonderful, and mind-bending movies ever made. From A Trip to the Moon (1902) to Arrival (2016), science fiction cinema has produced a body of classics with a broader range of styles, stories, and subject matter than perhaps any other film genre. They are movies that embed themselves in the depths of the mind, coloring our view of day-to-day reality and probably fueling a few dreams (and nightmares) along the way. In Turner Classic Movies: Must-See Sci-Fi, fifty unforgettable films are profiled, including beloved favorites like The Day the Earth Stood Still (1951) and Fantastic Voyage (1966), groundbreaking shockers like Planet of the Apes (1968) and Alien (1979), and lesser-known landmarks like Things to Come (1936) and Solaris (1972). Illustrated by astounding color and black-and-white images, the book presents the best of this mind-bending genre, detailing through insightful commentary and behind-the-scenes stories why each film remains essential viewing. A perfect gift for any film buff or sci-fi fanatic!

Author : Georgette Carneal
Publisher : Unknown
Page : 316 pages
File Size : 55,9 Mb
Release : 1930
Category : Inventors
ISBN : WISC:89067680066

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A Conqueror of Space by Georgette Carneal Pdf

Author : Tanith Lee
Publisher : Astra Publishing House
Page : 194 pages
File Size : 43,8 Mb
Release : 2019-05-07
Category : Fiction
ISBN : 9780698404649

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Electric Forest by Tanith Lee Pdf

Now available in a redesigned edition, Tanith Lee's sci-fi classic of a woman's quest for acceptance through the transfer of her consciousness to an artificial body. In the futuristic world of Indigo, reproduction is controlled by the government, guaranteeing that every baby is happy, healthy, and beautiful. But mistakes happen, and a rare few babies are accidentally born biologically, like Magdala Cled. Because of her natural-born features, Magdala is an outcast in society--abandoned at birth, abused in the orphanage she grew up in, and branded with the cruel name "Ugly." But Magdala's world turns upside down when she's approached by Claudio Loro, a wealthy scientist who has created a beautiful artificial body. When he offers to transfer Magdala's consciousness into the body, she cannot refuse the priceless opportunity for a new, beautiful life. However, unbeknownst to her, Claudio has crafted her new body to resemble Christophine del Jan, his rival scientist and former lover. Now Magdala must impersonate Christophine to infiltrate high society, court Claudio's advances, and decide whose side she is truly on--all while maintaining her real body lest it die...and she die with it.

Author : Dr. Qing Li
Publisher : Penguin
Page : 320 pages
File Size : 44,5 Mb
Release : 2018-04-17
Category : Self-Help
ISBN : 9780525559863

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Forest Bathing by Dr. Qing Li Pdf

The definitive guide to the therapeutic Japanese practice of shinrin-yoku, or the art and science of how trees can promote health and happiness Notice how a tree sways in the wind. Run your hands over its bark. Take in its citrusy scent. As a society we suffer from nature deficit disorder, but studies have shown that spending mindful, intentional time around trees--what the Japanese call shinrin-yoku, or forest bathing--can promote health and happiness. In this beautiful book--featuring more than 100 color photographs from forests around the world, including the forest therapy trails that criss-cross Japan--Dr. Qing Li, the world's foremost expert in forest medicine, shows how forest bathing can reduce your stress levels and blood pressure, strengthen your immune and cardiovascular systems, boost your energy, mood, creativity, and concentration, and even help you lose weight and live longer. Once you've discovered the healing power of trees, you can lose yourself in the beauty of your surroundings, leave everyday stress behind, and reach a place of greater calm and wellness.

Author : Terry Lee Rioux
Publisher : Simon and Schuster
Page : 385 pages
File Size : 40,7 Mb
Release : 2005-02-28
Category : Fiction
ISBN : 9781416500049

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From Sawdust to Stardust by Terry Lee Rioux Pdf

In the forty-year history of Star Trek®, none of the television show's actors are more beloved than DeForest Kelley. His portrayal of Leonard "Bones" McCoy, the southern physician aboard the Starship Enterprise™, brought an unaffected humanity to the groundbreaking space frontier series. Jackson DeForest Kelley came of age in Depression-era Georgia. He was raised on the sawdust trail, a preacher's kid steeped in his father's literal faith and judgment. But De's natural artistic gifts called him to a different way, and a visit to California at seventeen showed a bright new world. Theater and radio defined his early career -- but it was a World War II training film he made while serving in the Army Air Corps that led to his first Paramount Studios contract. After years of struggle, his lean, weathered look became well known in notable westerns and television programs such as You Are There and Bonanza. But his work on several pilots for writer-producer Gene Roddenberry changed his destiny and the course of cultural history. This thoroughly researched actor's life is about hard work and luck, loyalty and love. It is a journey that takes us all...from sawdust to stardust.

Author : Lewis Coe
Publisher : McFarland
Page : 240 pages
File Size : 41,5 Mb
Release : 2006-01-17
Category : History
ISBN : 9780786426096

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The Telephone and Its Several Inventors by Lewis Coe Pdf

On March 7, 1876, the U.S. Patent Office issued to a young inventor named Alexander Graham Bell what is arguably the most valuable patent ever: entitled "improvements in telegraphy," in truth it secured for Bell the basic principles involved in a telephone. On the same day that Bell filed his patent application, a caveat (a preliminary patent document) was filed by Elisha Gray. This coincidence sparked the first of many debates over whether Bell was the true inventor of the telephone. In the early 1860s Johann Phillipp Reis developed a version of the instrument, but his claims against Bell were hampered by the bungling of his lawyers in demonstrating his instrument in court. This work is a first look at the many men who developed the telephone and an examination of their claims against Bell's patent. A lay description of the phone is also provided, as well as a history of the development of the telephone system.

Author : Richard F. Bellaver
Publisher : AuthorHouse
Page : 450 pages
File Size : 41,6 Mb
Release : 2011-05-06
Category : Education
ISBN : 9781456732592

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Characters of the Information and Communication Industry by Richard F. Bellaver Pdf

I have taught a graduate course on the history of the information and communications industry for 20 years. The course shows students how the world has moved from primitive communication to the integrated multi-media situation we are in today. Concentration is on the fields of journalism, telecommunications, broadcasting, and computing. Emphasis is placed on the leaders of the areas and the political and cultural surroundings that encouraged or discouraged growth of the industry. It is true that technology is a driving force of this industry, but it has been the individual people (characters) impelled by discovery, acceptance and marketability of that technology who have taken the next step to improve communication. The Journalism field started with Gutenberg and early added Ben Franklin, later it got a little yellow with Hearst and Pulitzer. I think Henry Luce started the business of media integration, but Rupert Murdoch certainly keeps it going. The first practical use of electricity was found by Samuel Morse and his telegraph. Bell invented the telephone, or was it Meucci? Theodore Vail invented the Bell System. Broadcasting started with Marconis invention, or was it Teslas? David Sarnoff and William Paley made the medium practical and characters like Edwin R. Morrow, Walter Cronkite and even Oprah Winfrey gave it credibility. Certainly Charles Babbage and Ada Lovelace had something to do with the start of computers, but later scientists Vannevar bush and Jon von Neumann added the electronics. Then UNIVAC convinced Thomas Watson Junior that IBM better start making them. Jobs and Wozniac started the personal computer business, but Bill Gates created the software to make them run. Tim Berners-Lee hooked those computers to a network and then Amazon, eBay, and Google found a way to make money using the result. This book is the story of these people and companies.

Author : Maureen F. Tehan,Lee C. Godden,Margaret A. Young,Kirsty A. Gover
Publisher : Cambridge University Press
Page : 443 pages
File Size : 47,6 Mb
Release : 2017-10-26
Category : Law
ISBN : 9781107074262

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The Impact of Climate Change Mitigation on Indigenous and Forest Communities by Maureen F. Tehan,Lee C. Godden,Margaret A. Young,Kirsty A. Gover Pdf

Legal frameworks to 'reduce emissions from deforestation and forest degradation' (REDD+) are analysed to focus on protections and benefits for indigenous peoples and forest communities.