News tagged with television
(Medical Xpress)—Exposure to sunshine as a small child is crucial to the development of a healthy eye according to results of long-term myopia study conducted by University of Sydney researchers.
Ophthalmology May 21, 2013 | 5 / 5 (1) | 0
Little is known about the effect of physical education (PE) on child weight, but a new study from Cornell University finds that increasing the amount of time that elementary schoolchildren spent in gym class reduces the probability ...
Health May 20, 2013 | not rated yet | 0
(Medical Xpress)—Watching TV commercials of people munching on hot, crispy French fries or sugar-laden cereal resonates more with teens than advertisements about cell phone plans or the latest car.
Neuroscience May 08, 2013 | not rated yet | 0
Scientists at the Virginia Tech Carilion Research Institute have discovered how the predominant class of Alzheimer's pharmaceuticals might sharpen the brain's performance.
Neuroscience May 07, 2013 | 4.5 / 5 (2) | 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. ...
Health Oct 19, 2012 | 4.8 / 5 (4) | 3 |
(Medical Xpress)—We hear all the time that we need to get off the couch, stop watching TV and get moving. But what if watching TV under specific conditions could actually provide the mental boost you need ...
Psychology & Psychiatry Sep 06, 2012 | 3 / 5 (1) | 0 |
"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.
Psychology & Psychiatry Jan 12, 2012 | 4.1 / 5 (8) | 3 |
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 ...
Health Oct 17, 2011 | 4.5 / 5 (8) | 6 |
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.
Overweight and Obesity Jun 26, 2012 | not rated yet | 0
(Medical Xpress)—Research led by a psychologist at the University of Liverpool has found that using memories of recent meals reduces the amount of food eaten later on. It also found that being distracted when eating leads ...
Psychology & Psychiatry Mar 18, 2013 | not rated yet | 1
Children and adolescents who watch a lot of television are more likely to manifest antisocial and criminal behaviour when they become adults, according to a new University of Otago, New Zealand, study published online in ...
Pediatrics Feb 18, 2013 | not rated yet | 0 |
If you are a white girl, a black girl or a black boy, exposure to today's electronic media in the long run tends to make you feel worse about yourself. If you're a white boy, you'll feel better, according to a new study led ...
Pediatrics May 30, 2012 | 5 / 5 (1) | 4 |
A controversy at last: most of our DNA is junk, no it isn't, yes it is. Actually, I think it is – up to 90% really is junk.
Genetics Mar 15, 2013 | 4.5 / 5 (4) | 1
Increasing the number of hours of sleep adolescents get each night may reduce the prevalence of adolescent obesity, according to a new study by researchers from the Perelman School of Medicine at the University of Pennsylvania. ...
Overweight and Obesity Apr 08, 2013 | not rated yet | 0
In an age of long commutes, late sports practices, endless workdays and 24/7 television programming, the image of Mom hanging up her dish towel at 7 p.m. and declaring "the kitchen is closed" seems a quaint relic of an earlier ...
Health May 18, 2012 | 5 / 5 (1) | 1
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.
For more information about Television, read the full article at
This text uses material from Wikipedia and is available under the GNU Free Documentation License.