Tuesday, December 8, 2009

Against television. 29 July 1997. Web. 8 Dec. 2009. .

The Invention of Television. Web. 8 Dec. 2009. .

The problem with tv. 28 Mar. 2006. Web. 8 Dec. 2009. .

Historic Figures. Web. 8 Dec. 2009. .

Monday, December 7, 2009

Why was t.v. invented? Web. 7 Dec. 2009. .

How does tv work? 2 Dec. 2009. Web. 7 Dec. 2009. .


Friday, December 4, 2009

Impact of TV on ME

I've learned a lot from watching television. I learned how to speak English and other languages. How do I protect myself? How to invent stuff? I learn about places. I learned how to dance.

TV is also good because during my free time I can watch movies. It helps me to relax. If I didn't have a TV, I would be bored.

what tv will look like in 10 years from now?

In 10 year tv will look like a I-pod touch, you can take it in your pocket, with a strong battery and solar , and you can watch anything you want for free.

Why was T.V Invented?

Television was the next logical step beyond radio. People used to sit around and listen to radio sitcoms like we watch TV shows. The next logical step beyond being able to only hear them was being able to see them. The TV like the radio was invented so the government could commincate over a long distance with its moving armies, but unlike the radio this way they would be able to sea each other face to face. It was a way of communicating life ideas. The TV was invented so people could be entertained by actors and watch people living dream jobs. Also, the TV can be used for education, like the Discovery Kids channel and the National Geographic channel. Television was invented for the advancement of society. It is not the inventor's fault if a creation meant for family entertainment is often used in a detrimental way. It was a simple act of the government. At the time TV was created, the government wanted to get the message of fear out to the public on a broader.

The modern television was only made possible with the scientific advances of the early 1900s, which included significant developments in radio, x-rays, and physics. Wireless transmission of sound became possible with the invention of the radio at the turn of the century. But the critical component necessary for the high-fidelity projection of reconstituted light information was the cathode-ray tube, originally used to produce x-rays for medical purposes. In 1906, I found that manipulating the electron stream of the cathode-ray tube with a magnetic field was possible. Less than a year later, it was suggested that the cathode-ray tube be used as a receiving device for images. Im a Russian scientist,i quickly created such a cathode-ray tube and encouraged further development of the technology.

Rosing's student, Vladimir K. Zworykin, migrated to the United States after WWI and created the "iconoscope", a device that scanned an image with an electron beam and converted it into electronic signals for transmission. To minimize the amount of data needing to be sent, he fed the image through a "mosaic" - a plate covered with microscopic photosensitive dots we now know as "pixels". The information was then broadcasted and received by a device that ran the process in reverse, using the cathode-ray tube to project images far more quickly and effectively than the mechanical televisions of the past. The first incarnation of the modern TV was born. It was successfully demonstrated in a public context in 1929.


how does a tv work?

Just as a radio and a telephone are devices for converting acoustic energy into electrical and vice versa, the television receives wirelessly transmitted electromagnetic waves and converts them into acoustic and light energy for viewing. Although the initial inspiration for the television existed as early as the 1830s, when i invented demonstrated the relationship between light and electricity, the television did not become practical for mass-production until more than a century later - in the 1940s. The history of the television is marked by a series of devices that were progressively more effective at sending or receiving wireless electronic patterns containing light and sound information.

The first "televisions", like the first computers, made use of mechanical media to store information. introduced a device using a rotating scanning disk that was perforated with small holes in a spiral pattern. Images could be "broken down" through the use of a sensitize photocell placed behind the spinning disk. The photocell then transmitted the image as a series of electrical impulses to a receiver, where the electricity could again be converted into light and shined through an identical spinning disk, which reconstituted the initial image - but at a very poor level of resolution. Many variants and imitations of this mechanical TV system were invented and used by hobbyists and electronics enthusiasts throughout the next quarter-century. Incremental improvements occurred, but the mechanical television primarily remained a curiosity impractical for mass use.

Thursday, December 3, 2009

  • The TV like the radio was invented so the government could commincate over a long distance with its moving armies, but unlike the radio this way they would be able to sea each other face to face.

  • It was a way of communicating life ideas.

  • The TV was invented so people could be entertained by actors and watch people living dream jobs. Also, the TV can be used for education, like the Discovery Kids channel and the National Geographic channel.

  • Television was invented for the advancement of society. It is not the inventor's fault if a creation meant for family entertainment is often used in a detrimental way.

  • It was a simple act of the government. At the time TV was created, the government wanted to get the message of fear out to the public on a broader level. They thought it would be an easier way to eventually control the public. As many already know, it has proven to work in that sense to this day.

  • The television was invented so that the inventor (John Logie Baird) could be entertained when he was at work.

  • Television was invented to give you a way to be informed of what is going on around you.

  • John Logie Baird who is the "inventor of the worlds first working television" obviously saw that visual communication was required, the next step after Marconi had invented Radio.
http://answers.yahoo.com/question/index?qid=20080523023604AAp9OQO

Wednesday, December 2, 2009

http://answers.yahoo.com/question/index?qid=20080523023604AAp9OQO

I used to have cable TV. I never cared much for sitcoms -- I favored "quality programming." With dozens of channels to fill the cable provider made several PBS affiliates available, probably because it didn't cost anything, so there was almost always a documentary on some curious subject being broadcast. I started to become a documentary junky. I watched shows about insects, frogs and reptiles. I saw vast armies of weaver ants consuming a forest, tree by tree. I sat and watched komodo dragons bobbing their heads and snuffling as they trotted along, while the khaki-clad narrator in the foreground whispered how fortunate it was that those giant, man-eating lizards have poor eyesight. I watched BBC dramas, historical series, and Wall Street Week with the punning Louis R. I saw most of the Jacques Cousteau specials at least twice, and was fascinated by travelogues and anthropological studies. When there was really nothing on, I could still be entertained by flipping though the channels with the remote controller, juxtaposing inanities into an amusing montage of surrealistic social commentary.

A friend of mine would listen sadly whenever I gushed over something I'd seen recently. "You know," he'd say, "it doesn't really matter what you watch, TV is inherently passive. Life is better without one. You'll read books and think more. You'll spend more time interacting constructively with the world, even if it's just a solitary hobby. Anything is better than watching that box."

I wondered whether he were right. It seemed like I was learning lots of facts from my viewing, seeing places and people otherwise inaccessible. And I wasn't convinced it was wholly passive. Rather than drooling before the screen with glazed eyes, my natural tendency towards critical analysis would step forward. I'd I watch actively, on several levels, following the narrative while observing the technique by which it was constructed and questioning its coherence, motivation and accuracy. But I did notice that TV absorbed a lot of time. Whenever I had some free minutes, too short for anything else, or thought I was too tired to go out, or work on some project, or even read, the TV would beckon. It was so convenient. It was even quasi-social. After sex, in a languid conversational void, you could watch TV together before falling asleep, and still be doing the same thing, together.

But things changed and I woke up. I moved the TV into the closet, then gave it away. In the years since I'm sure I've missed many informative and moving programs, but gained much more. A few of the most obvious differences are that I've lost all interest in pro sports while spending hours daily in real athletics; I no longer watch travel shows, but I've traveled much more; and I'm actually reading those books I always wanted to. More subtly, by avoiding bombardment with supersonic image virus I feel like I'm slowly drifting free from some of the more insipid and repugnant aspects of contemporary American culture. It may be that I've partially substituted other escapist vices for viewing, like reading and research, but those activities are still much more self-demanding, intellectually enriching and guided by my own values and curiosity, not those of any sponsor.

I'm confident that life without a TV is much better. Think about it; then get rid of yours. Smash it-- Or give it to someone whom you'd like to curse.

Tuesday, December 1, 2009

http://www.htw.info/

Monday, November 30, 2009

1862 First Still Image Transferred

I invent my Pantelegraph and i become the first person to transmit a still image over wires.

1873

Scientists May and Smith experiment with selenium and light, this reveals the possibilty for inventors to transform images into electronic signals.

1876

At Boston civil servant i was thinking about complete television systems and in 1877 i put forward drawings for what he called a selenium camera that would allow people to see by electricity.

My coins the term "cathode rays" to describe the light emitted when an electric current was forced through a vacuum tube.

Late 1870s

Scientists and engineers like me, Figuier, and Senlecq were suggesting alternative designs for Telectroscopes.

1880

Inventors Alexander Graham Bell and Thomas Edison theorize about telephone devices that transmit image as well as sound.

Bell's Photophone used light to transmit sound and he wanted to advance his device for image sending.

I build a rudimentary system with light-sensitive cells.

1881

I experiment with my Telephotography that was similiar to Bell's Photophone.

1884 18 Lines of Resolution

Paul Nipkow sends images over wires using a rotating metal disk technology calling it the electric telescope with 18 lines of resolution.

1900 And We Called It Television

At the World's Fair in Paris, the first International Congress of Electricity was held. That is where Russian Constantin Perskyi made the first known use of the word "television."

1862 First Still Image Transferred

I invent my Pantelegraph and i become the first person to transmit a still image over wires.

1873

Scientists May and Smith experiment with selenium and light, this reveals the possibilty for inventors to transform images into electronic signals.

1876

At Boston civil servant i was thinking about complete television systems and in 1877 i put forward drawings for what he called a selenium camera that would allow people to see by electricity.

My coins the term "cathode rays" to describe the light emitted when an electric current was forced through a vacuum tube.

Late 1870s

Scientists and engineers like me, Figuier, and Senlecq were suggesting alternative designs for Telectroscopes.



http://www.bostonherald.com/blogs/sports/rap_sheet/wp-content/uploads/2009/09/old_tv.jpg

Friday, November 20, 2009

Most business magazines will tell you the phone companies will have a tough time unseating the cable companies when it comes to TV transmission. Here is why every one of those magazines and newspapers is wrong: HDTV selection stinks today. Apparently, I spent a fortune for a 60" HDTV so I could watch but a handful of channels on it.

Most of what I watch is not HDTV and I either can have a black square around what I view or choose to stretch the picture to fill the whole screen. Every actor gains 20 pounds if I use the latter approach, and I am sick and tired of paying more for a TV that, most of the time, makes my TV viewing experience worse.

The phone companies should supply 50 HD channels, or even more. If they did that, I would switch to IPTV tomorrow and never look back. I understand fully that, without HD content, this isn't possible, but Hollywood and content providers need to realize that HDTV will be the next big thing for the industry. They need to start putting out the programming. There certainly is an audience for it. The question is, how much more will people pay for more HDTV programming. I would say $20–$25 per month - about $1 per HD channel per month - is painless if you get another 20–30 HD channels. Hopefully, this can be a profitable idea for the phone companies.


I was a Scottish engineer, most famous for being the first person to demonstrate a working television.

I was born on 14 August 1888 in Helensburgh on the west coast of Scotland, im son of a clergyman. Dogged by ill health for most of my life, he nonetheless showed early signs of ingenuity, rigging up a telephone exchange to connect my bedroom to those of my friends across the street. My studies at Glasgow University were interrupted by the outbreak of World War One. Rejected as unfit for the forces, I served as superintendent engineer of the Clyde Valley Electrical Power Company. When the war ended i set himself up in business, with mixed results.

then i moved to the south coast of England and applied mymself to creating a television, a dream of many scientists for decades. My first crude apparatus was made of odds and ends, but by 1924 i managed to transmit a flickering image across a few feet. On 26 January 1926 i gave the world's first demonstration of true television before 50 scientists in an attic room in central London. In 1927, my television was demonstrated over 438 miles of telephone line between London and Glasgow, and i formed the Baird Television Development Company. (BTDC). In 1928, the BTDC achieved the first transatlantic television transmission between London and New York and the first transmission to a ship in mid-Atlantic. I also gave the first demonstration of both colour and stereoscopic television.

In 1929, the German post office gave me the facilities to develop an experimental television service based on my mechanical system, the only one operable at the time. Sound and vision were initially sent alternately, and only began to be transmitted simultaneously from 1930. However,my mechanical system was rapidly becoming obsolete as electronic systems were developed, chiefly by Marconi in America. Although i had invested in the mechanical system in order to achieve early results, i also been exploring electronic systems from an early stage. Nevertheless, a BBC committee of inquiry in 1935 prompted a side-by-side trial between Marconi's all-electronic television system, which worked on 405 lines to my 240. Marconi won, and in 1937 my system was dropped.

Im died on 14 June 1946 in Bexhill-on-Sea in Sussex.

Thursday, November 19, 2009

 I was born on August 13th, 1888, in Helensburgh, Dunbarton, Scotland and died on June 14th, 1946, in Bexhill-on-Sea, Sussex,

England.I received a diploma course in electrical engineering at the Glasgow and West of Scotland Technical College (now called Strathclyde University), and studied towards my Bachelor of Science Degree in electrical engineering from the University of Glasgow, interrupted by the outbreak of W.W.I.


system. During the 1920's, I and American Clarence W. Hansell patented the idea of using arrays of transparent rods to transmit images for television and facsimiles respectively.


My 30 line images were the first demonstrations of television by reflected light rather than back-lit silhouettes. I based my technology on Paul Nipkow's scanning disk idea and later developments in electronics.


My television pioneer created the first televised pictures of objects in motion (1924), my first televised human face (1925) and a year later I televised the first moving object image at the Royal Institution in London. My1928 trans-atlantic transmission of the image of a human face was a broadcasting milestone. Color television (1928), stereoscopic television and television by infra-red light were all demonstrated by me before 1930. I successfully lobbied for broadcast time with the British Broadcasting Company, the BBC started broadcasting television on my 30-line system in 1929. The first simultaneous sound and vision telecast was broadcast in 1930. In July 1930, my first British Television Play was transmitted, "Im the Man with the Flower in his Mouth."


Wednesday, November 18, 2009

who is creadited for this innovation

nventors anticipated the public demand for television before the advent of radio broadcasting. So many participated in the development that it is impossible to answer the question "Who invented television?", but a few were so important as to be recognized as pioneers.

Paul Nipkow proposed the first practical mechanical scanner in Germany in 1884. The scanner was a rotating disk with holes arranged in a spiral around its edge. Light passing through the holes as the disk rotated produced a rectangular scanning pattern or raster which could be used to either generate an electrical signal from the scene for transmitting or to produce an image from the signal at the receiver. As the disk rotated, the image was scanned by the perforations in the disk, and light from different portions of it passed to a photocell. The number of scanned lines was equal to the number of perforations and each rotation of the disk produced a television frame. In the receiver, the brightness of the light source would be varied by the signal voltage. Again, the light passed through a synchronously rotating perforated disk and formed a raster on the projection screen. Mechanical viewers had the serious limitation of resolution and brightness.

John Logie Baird, a Scottish engineer-inventor, successfully promoted a television system based on the Nipkrow principle, received backing and sold transmitters and receivers. Laboratories in the United States and Great Britain worked to develop an all-electronic system. In Britain, the Electric and Musical Industries, Ltd., provided a system along with Baird's, and these were experimentally used to broadcast television programs by the BBC in November 1936. The EMI system won overwhelmingly. An American inventor, Charles Francis Jenkins, followed with a rotating ring whose thickness varied and increased around its circumference, forcing a rotating prism. By using two rings overlapping at right angles, a beam could be made to scan both horizontally and vertically, which unfortunately produced small, dim and fuzzy images. Jenkins' system, like Baird's, failed on the basis of poor quality.

AT&T first demonstrated a television system developed by one of Bell Lab's scientists, Herbert Ives, again based on the Nipkow disks. GE also demonstrated a mechanical system developed by Ernst Alexanderson. David Sarnoff, however, would turn to research for a successful electronic system.

In the 1920's, Alan A. Campbell-Swinton, a prominent electrical engineer in London, proposed a system that would use CRT's displaying the picture at the receiver, with electromagnetic scanning to form the raster. His transmitter tube, using a chamber filled with gas which could conduct electrons, was not suitable. Credit for the first practical TV signal-generator of pickup must be shared by Vladimir K. Zworykin and Philo T. Farnsworth, who invented the iconoscope and the image dissector respectively. Successful electronic TV would follow.

http://ieee.cincinnati.fuse.net/reiman/10_1994.html

Tuesday, November 17, 2009

                       What was the purpose of the television?


Yes television is there for entertainment. But is also a way of getting information across to the public e.g. news stories ans weather. For example, the news ias there to educate us about important decisions happening around the world and the weather is there to tell us a message of how the day is going to be in advance so we are able to make plans if wishing to go out to travel

Wednesday, November 4, 2009

who invented the tv?

It was indeed John Logie Baird who was born on the 13th August 1888 in Helensburgh,Dumbarton,Scotland.He died on 14th June 1946 in Bexhill -on -Sea,Sussex England.
He was a Scottish engineer.Plagued by ill health,he gave up his job as an electric-power engineer in 1922 and devoted himself to television research.He produced televised objects in outline in 1924 and recognizable human faces in 1925,and in 1926 became the first person to televise pictures of objects in motion.He demonstrated colour television in 1928. The German post office gave him facilities to develop a television service in 1929.When the BBC television service began(1936),his system competed with that of Marconi Electric and Musical Industries:the BBC adopted the latter exclusively in 1937.Baird was reported to have completed research on stereoscopic television at the time of his death.

Friday, October 23, 2009

tv

Growth of Television
YearTV Sets in Use# Lines in Picture
1928 & EarlierFew Experimental30 Lines
1929Few Experimental60 Lines
1931Few Experimental120 Lines
1933Few Experimental240 Lines
193450-100343 Lines
1939Less than 1,000441 Lines
19411,000525 Lines
19466,000525 Lines
1947142,000525 Lines
1948977,000525 Lines
19493,660,000525 Lines
19509,732,000525 Lines
195115,637,000525 Lines
195221,782,000525 Lines
195325,233,000525 Lines

    Interesting facts:
  • A pre World War II (1941) Television Set is rarer than a Stradivarius Violin!
  • The number of televisions sold in the US for the month of September 2001 was 2.3 million!

History Of Television

Did you know?

  • Invented in 1929, television was first introduced to the public at a World's Fair in 1939. 

  • At first, television received mixed reviews because there was little to watch and picture quality was poor. 

  • The first television station license was issued by the Federal Communications Commission on July 1, 1941. 

  • The first licenses issued were for commercial stations. Thus, television began in the United States as a vehicle for selling goods and services while providing entertainment. 

  • Only 20 years later, in the early 1960s, the first educational stations (later Public Broadcasting) began offering programs with the aim to educate and enrich people's lives. 

  • WWII delayed the formation of television broadcasting till the late 1940s. 

  • From the late 1940s to the mid-1950s three main broadcasting networks emerged: CBS, NBC, and ABC. 

  • Today, most viewers (with cable or satellite) have access to an average of 202.6 available channels (Television Bureau of Advertising, 2001). 

  • In 1950, only 9% of U.S. households owned a television (Television Bureau of Advertising, 2001).

  • By 1955, within five years, 64.5% of U.S. households owned a TV (Television Bureau of Advertising, 2001). 

  • By 1965 at least one TV was in 92.6% of U.S. households, and presently TVs, at 98.2% (99.9% of those are color), are in virtually every household (Television Bureau of Advertising, 2001). 

  • Signals can be received virtually everywhere--either over the airwaves, by cable, or by satellite. 

  • In 1970, about 7% of homes had cable television (Donnerstein, 1994). 

  • When HBO started sending signals via satellite in 1975, cable TV started to realize its capability and by 1990 it reached 56.4% of U.S. households. Currently wired cable television has reached 69.4% of television households (Television Bureau of Advertising, 2001). 

  • 78% of adults surveyed report that they have home cable or satellite television (National Public Radio, 2000). 

  • In 1970, VCR's were hardly seen in homes. Now VCRs are a media staple in over 90% of American households (Lyman, 2002). Though, DVD players, with digital capability, are fast becoming the norm. 

  • On the horizon is Digital TV. With Internet and television convergence, the stage is set for interactive television.

Tuesday, October 20, 2009

annotation

INITIAL APPRAISAL


A. Author

  1. What are the author's credentials--institutional affiliation (where he or she works), educational background, past writings, or experience? Is the book or article written on a topic in the author's area of expertise? You can use the various Who's Who publications for the U.S. and other countries and for specific subjects and the biographical information located in the publication itself to help determine the author's affiliation and credentials.
  2. Has your instructor mentioned this author? Have you seen the author's name cited in other sources or bibliographies? Respected authors are cited frequently by other scholars. For this reason, always note those names that appear in many different sources.
  3. Is the author associated with a reputable institution or organization? What are the basic values or goals of the organization or institution?
B. Date of Publication

  1. When was the source published? This date is often located on the face of the title page below the name of the publisher. If it is not there, look for the copyright date on the reverse of the title page. On Web pages, the date of the last revision is usually at the bottom of the home page, sometimes every page.
  2. Is the source current or out-of-date for your topic? Topic areas of continuing and rapid development, such as the sciences, demand more current information. On the other hand, topics in the humanities often require material that was written many years ago. At the other extreme, some news sources on the Web now note the hour and minute that articles are posted on their site.
C. Edition or Revision

Is this a first edition of this publication or not? Further editions indicate a source has been revised and updated to reflect changes in knowledge, include omissions, and harmonize with its intended reader's needs. Also, many printings or editions may indicate that the work has become a standard source in the area and is reliable. If you are using a Web source, do the pages indicate revision dates?

D. Publisher

Note the publisher. If the source is published by a university press, it is likely to be scholarly. Although the fact that the publisher is reputable does not necessarily guarantee quality, it does show that the publisher may have high regard for the source being published.

E. Title of Journal

Is this a scholarly or a popular journal? This distinction is important because it indicates different levels of complexity in conveying ideas. If you need help in determining the type of journal, see Distinguishing Scholarly from Non-Scholarly Periodicals. Or you may wish to check your journal title in the latest edition of Katz's Magazines for Libraries (Olin Ref Z 6941 .K21, shelved at the reference desk) for a brief evaluative description.


Monday, October 19, 2009

5 Sources

5 Sources for Free Computer Technology Education.

1. Massachusetts Institute of Technology (mit.edu)

MIT offers more than 50 free computer technology courses at the undergraduate and graduate level. Courses are easy to download and most include lecture notes, labs, assignments, audio, videos and text lessons.

University of California at Berkeley (berkeley.edu)

UC Berkeley offers a wide variety of free computer technology. Courses are broken down into separate lectures and can be viewed as webcasts or in some cases downloaded as podcasts.

3. About University (about.com)

There are more than 50 free computer technology courses offered through About University. Courses are delivered daily or weekly to your email address of choice and last anywhere from one day to 12 weeks. Most courses are text based, but some include images, videos and links to additional resources. There is also a guide that you can email and a discussion forum if you come across something you don't understand.

4. HP Learning Center (hp.com

There are dozens of free computer technology courses available through the HP Learning Center. Courses are instructor-led and available 24/7. Most of the courses are text based, but there are quite a few video courses to choose from as well.

5. Goodwill Community Foundation (gcflearnfree.org)

GCFLearnFree.org, which is funded by the GCF, offers several different free computer technology courses. Most courses focus on the basics and are broken down into easy-to-follow lessons. Individuals who aren't interested in self-study can sign up for instructor-led courses (also free).                                                                                                                                                                               

 Related articles to 5 Sources for Free Computer Technology                                                      Education Online.

  • Best School for Learning Computer Technology - Kansas City, MO

    Computers increasingly influence in the way we live, and the people who understand how they work and who can keep them functioning are in high demand. Computer technology training is available near Kansas City, Missouri at Lex La-Ray Technical Center. This small school, located 40 miles east of Kansas City in Lexington, Missouri, offers a Computer Maintenance and Networking Certificate.
  • Top Ranked Computer Technology School - Bakersfield, CA

    Students looking for a career in computer technology can turn to Bakersfield College in Bakersfield, C.A. Bakersfield College offers a variety of technical degree programs, including options to earn either an Associate in Science (AS) or an Associate in Arts (AA) degree in Computer Information Systems (CIS), Computer Science, Web Development and Electronics Technology.

Friday, October 9, 2009

Radio broadcast


By: Edward R. Murrow


Date: September 18, 21, and 22, 1940

 

Source: Murrow, Edward R. "London Blitz: September 1940." Radio transcript. Reprinted in Hynes, Samuel et al., eds. Reporting World War II: Part One, American Journalism, 1938–1944. New York: Library of America, 1995.


Invented in 1929, television was first introduced to the public at a World's Fair in 1939.


About the Author: Born Egbert Roscoe Murrow (1908–1965) in rural North Carolina, Edward R. Murrow became a true pioneer in broadcast journalism. He worked first in radio, gaining worldwide acclaim for his dramatic broadcasts during the London Blitz, then moved to the emerging medium of television after World War II (1939–1945). Murrow died of lung cancer on April 27, 1965, at the age of 57. Numerous awards are now named for the famed journalist, who remains the most revered broadcaster in the history of news reporting.


Although the basic components of television were developed as early as the 1870s, the technology was not sophisticated enough to broadcast an image until the 1920s. Even then television was too crude for widespread use. There were eighteen experimental television stations in the United States in 1931, but opposition to the new medium by radio broadcasters and a lack of funding during the Depression left these promising starts wanting. Nonetheless, technical innovations by inventors such as Vladimir Zworykin and Philo Farnsworth refined and improved television, and RCA was ready to introduce widespread commercial manufacture of television sets by 1938. RCA's competitors opposed the deployment of a national broadcast system based on RCA technology and moved to block the licensing of commercial broadcasting by the FCC. In 1940 a government panel concluded that RCA was attempting to establish industry broadcasting...


Thursday, October 8, 2009

Who is the inventor of television? You have really opened up a can of worms with that question! Probably no other invention in history has been so hotly disputed as the prestigious claim to the invention of 'Tele-vision or 'long-distance sight' by wireless.”

Since Marconi’s invention of wireless telegraphy in 1897, the imagination of many inventors have been sparked with the notion of sending images as well as sound, wirelessly. The first documented notion of sending components of pictures over a series of multiple circuits is credited to George Carey. Another inventor, W. E. Sawyer, suggested the possibility of sending an image over a single wire by rapidly scanning parts of the picture in succession.

On December 2, 1922, in Sorbonne, France, Edwin Belin, an Englishman, who held the patent for the transmission of photographs by wire as well as fiber optics and radar, demonstrated a mechanical scanning device that was an early precursor to modern television. Belin’s machine took flashes of light and directed them at a selenium element connected to an electronic device that produced sound waves. These sound waves could be received in another location and remodulated into flashes of light on a mirror.

Up until this point, the concept behind television was established, but it wasn’t until electronic scanning of imagery (the breaking up of images into tiny points of light for transmission over radio waves), was invented, that modern television received its start. But here is where the controversy really heats up.

The credit as to who was the inventor of modern television really comes down to two different people in two different places both working on the same problem at about the same time: Vladimir Kosma Zworykin, a Russian-born American inventor working for Westinghouse, and Philo Taylor Farnsworth, a privately backed farm boy from the state of Utah.

“Zworykin had a patent, but Farnsworth had a picture…”

Zworykin is usually credited as being the father of modern television. This was because the patent for the heart of the TV, the electron scanning tube, was first applied for by Zworykin in 1923, under the name of an iconoscope. The iconoscope was an electronic image scanner - essentially a primitive television camera. Farnsworth was the first of the two inventors to successfully demonstrate the transmission of television signals, which he did on September 7, 1927, using a scanning tube of his own design. Farnsworth received a patent for his electron scanning tube in 1930. Zworykin was not able to duplicate Farnsworth’s achievements until 1934 and his patent for a scanning tube was not issued until 1938. The truth of the matter is this, that while Zworykin applied for the patent for his iconoscope in 1923, the invention was not functional until some years later and all earlier efforts were of such poor quality that Westinghouse officials ordered him to work on something “more useful.”

Tuesday, October 6, 2009

NHD about tv

This History Timeline has been developed to provide a 'snapshot' of the famous people and events during this historical time period. Important dates in a fast, comprehensive,
chronological, or date order providing an actual sequence of important
past events which were of considerable significance to the
famous people involved in this time period.
A full History Timeline...
Read on!

The first tv was invented in 1775
produces static electricity by friction

Thursday, October 1, 2009

l crackers she kept to ward off fainting spells for kids who had skipped breakfast were varied and creative. We looked forward to a run down of each day’s adventures. One episode that remains vivid in my memory dealt with sex education.

The point in the school year for giving "The Talk" had arrived. At the time, my mother was covering two different schools. As was the practice in the school district where the schools were located, she sent notices to the students’ parents advising them of the topic to be discussed and inviting anyone interested to attend. At one of the schools, it was just my mother and the students. At the other school, some concerned parents added themselves to the mix.

The result was interesting and instructive. My mother gave essentially the same presentation at both schools. She then opened the floor to questions. At the school without parents, the questions and background information leading up to them were numerous. At the school with parents, the room was silent.

Sex education in schools has changed since my mother gave her presentation. Today, it often includes a discussion of condom usage and, in some schools, condom distribution. Parents’ desire to remain actively involved in their children’s sex education, on the other hand, has not changed. The potential chilling effect of parents’ involvement has also not changed.

While parents have primary responsibility for rearing their children, they need to recognize that sometimes children are more comfortable seeking counsel from others. An informed, accessible health care provider, like a school nurse, can serve this important role. As in the past, the nurse can explain without judgment the consequences of sexual relations. In light of the current reality of teen sexuality, the nurse can also explain how to use a condom properly and, when approached by a student who has decided to have sexual relations, ensure that the student has a condom.

Making condoms available in schools is not a simple matter, however, and the state of the law on the issue is divided. Courts have tended to defer to school boards’ decisions and allow condom distribution programs to stand, but legislators have tended to restrict school boards’ powers and prohibit such programs from being instituted. The debate revolves around rights, responsibilities, and potential liability. It also revolves around the message teens receive from such programs.

The need to reduce the risk of teen pregnancy and sexually transmitted disease for those who decide to have sexual relations requires less divisiveness. Parents can still instruct their children as they see fit, but parents and their elected representatives should entrust school boards with the power to supplement that instruction with informed, health-based programs and services, including condom distribution programs. The principal message teens should receive is that their continued health and safety is key.

Wednesday, September 30, 2009

Facts of the Case:
On July 11, 1964 Lt. Col. Lemuel Penn was shot and killed by three members of the Ku Klux Klan while driving home from Washington, D.C. The alleged shooters, James Lackey, Cecil Myers, and Howard Sims, were indicted but acquitted by an all-white jury. Following the acquittal, the three defendants were indicted on charges of conspiracy to threaten, abuse, and kill African-Americans. Three alleged co-conspirators, Denver Phillips, George Turner, and Herbert Guest, were also charged.
U.S. Code defines criminal conspiracy as two or more individuals conspiring to "injure, oppress, threaten, or intimidate any citizen in the free exercise or enjoyment of any right or privilege secured to him by the Constitution or laws of the United States." The indictment filed against the six alleged conspirators accused them of acting to deny African-Americans full and equal enjoyment and utilization of goods and services, including access to state highways and free travel to and from Georgia on public streets.
The defendants moved to dismiss the indictment, arguing that it did not allege a specific denial of rights under U.S. law. The district court agreed, and dismissed the indictment. The prosecution appealed, arguing that the indictment alleged, in part, a denial of rights under the Equal Protection Clause of the Fourteenth Amendment.
Question:
Did the alleged actions of the six defendants constitute a denial of rights under the Constitution and U.S. law?
Conclusion:
Yes. In an 8-1 opinion authored by Justice Potter Stewart, the Court found that the indictment did allege a denial of constitutional rights. In United States v. Price, an opinion released the same day as Guest, the Court found that Fourteenth Amendment due process rights were covered by the criminal conspiracy statute, and the Court found no reason to distinguish between two clauses of the same amendment. Furthermore, the Court found that, although the Equal Protection Clause only covers state action, such action need not be "exclusive or direct." For instance, the indictment alleged that the conspirators attempted to have African-Americans arrested by filing false criminal reports. Because such an act would involve state actors in the form of law enforcement officials, according to the Court, the Equal Protection Clause applied. "Although it is possible that a bill of particulars, or proof if the case goes to trial, would disclose no cooperative action of that kind by officials of the State, the allegation is enough to prevent dismissal of…the indictment."

National History Day makes history come alive for America's youth by engaging them in the discovery of the historic, cultural and social experiences of the past. Through hands-on experiences and presentations, today's youth are better able to inform the present and shape the future. NHD inspires children through exciting competitions and transforms teaching through project-based curriculum and instruction.


National History Day serves more than 600,000 students annually in all U.S. states and territories.

We represent an extensive network of students, teachers, state coordinators, historians, librarians and archivists in communities large and small.

NHD advocates the importance of history education to policy makers in our nation's capital, keeping our teaching network connected, informed and supplied with critical resources.


Friday, September 25, 2009

NHD

What is National History Day?

National History Day (NHD) is a highly regarded academic program for elementary and secondary school students.

Each year, more than half a million students, encouraged by thousands of teachers nationwide participate in the NHD contest. Students choose historical topics related to a theme and conduct extensive primary and secondary research through libraries, archives, museums, oral history interviews and historic sites. After analyzing and interpreting their sources and drawing conclusions about their topics’ significance in history, students present their work in original papers, websites, exhibits, performances and documentaries.

Friday, September 11, 2009