Teaching new mums about healthy eating and active play can help cut the risk of their child being overweight or obese, a study published today in the British Medical Journal finds.
Jun 26, 2012
0
0
(Medical Xpress)—Children could be better off playing video games this holiday season than watching television, a QUT study shows.
Jan 16, 2013
0
4
(Medical Xpress) -- New research conducted at McMaster University suggests women vying for male attention become aggressive towards other women they see as sexual rivals, a scene often played out in the media and popular ...
Dec 8, 2011
1
0
The time most of us spend looking at a screen has rapidly increased over the past decade. If we're not at work on the computer, we're likely to stay tuned into the online sphere via a smart phone or tablet. Shelves of books ...
Oct 19, 2012
3
0
You come into contact every day with light-emitting diodes (LEDs) -- they illuminate alarm clocks, new televisions, traffic lights, and smartphone displays. Increasingly, you will see white-light versions of LEDs becoming ...
Oct 17, 2011
6
0
A team of researchers at St George's University of London has found that people dying from a heart attack during or soon after having sex is rare. In their paper published in the journal JAMA Cardiology, the group describes ...
(Medical Xpress) -- In the racy television hit show, Sex and the City, Carrie, one of the main characters tells her best girlfriends that "Men who are too good looking are never good in bed because they never had to be." ...
Oct 14, 2011
3
0
Fitness experts are always telling us that incorporating movement into our day is a good way to burn calories. But is it effective? A study finds that walking in place during commercials while watching TV actually provides ...
Jan 24, 2012
0
1
"If it bleeds, it leads," goes the cynical saying with television and newspaper editors. In other words, most news is bad news and the worst news gets the big story on the front page.
Jan 12, 2012
3
0
(Medical Xpress)—A team of researchers with Newcastle University in the U.K. has found no evidence of balance or coordination impairments in people watching a stereoscopic (3D) movie on a television screen. In their paper ...
Television (TV) is a widely used telecommunication medium for transmitting and receiving moving images, either monochromatic ("black and white") or color, usually accompanied by sound. "Television" may also refer specifically to a television set, television programming or television transmission. The word is derived from mixed Latin and Greek roots, meaning "far sight": Greek tele (τῆλε), far, and Latin visio, sight (from video, vis- to see, or to view in the first person).
Commercially available since the late 1930s, the television set has become a common communications receiver in homes, businesses and institutions, particularly as a source of entertainment and news. Since the 1970s the availability of video cassettes, laserdiscs, DVDs and now Blu-ray discs, have resulted in the television set frequently being used for viewing recorded as well as broadcast material.
Although other forms such as closed-circuit television are in use, the most common usage of the medium is for broadcast television, which was modeled on the existing radio broadcasting systems developed in the 1920s, and uses high-powered radio-frequency transmitters to broadcast the television signal to individual TV receivers.
Broadcast TV is typically disseminated via radio transmissions on designated channels in the 54-890 megahertz frequency band. Signals are now often transmitted with stereo and/or surround sound in many countries. Until the 2000s broadcast TV programs were generally recorded and transmitted as an analog signal, but in recent years public and commercial broadcasters have been progressively introducing digital television broadcasting technology.
A standard television set comprises multiple internal electronic circuits, including those for receiving and decoding broadcast signals. A visual display device which lacks a tuner is properly called a monitor, rather than a television. A television system may use different technical standards such as digital television (DTV) and high-definition television (HDTV). Television systems are also used for surveillance, industrial process control, and guiding of weapons, in places where direct observation is difficult or dangerous.
Amateur television (HAM TV or ATV) is also used for experimentation, pleasure and public service events by amateur radio operators. HAM TV stations were on the air in many cities before commercial TV stations came on the air.
This text uses material from Wikipedia, licensed under CC BY-SA
