Wednesday, 31 October 2012

Telescope in China to track moon exploration

The telescope, as large as eight basketball courts with a diameter of 65 meters and height of 70 meters, is the fourth largest in the world and will be used to track and collect data from satellites and space probes.

The newly built radio telescope can pick up eight different frequency bands and also track Earth satellites, lunar exploration satellites and deep space probes, according to Hong Xiaoyu, head of the Shanghai Astronomical Observatory.
It will greatly enhance China's ability to position space probes and assist the flights of Chang'e III or the third phase of the country's lunar exploration program, the observatory announced on its website yesterday.
"We hope that the new radio telescope will go into operation earlier so that we can use it to observe the unmanned lunar probe Chang'e-II," said Wu Weiren, chief designer of the lunar orbiter project.
Chang'e II, China's second unmanned moon probe, was launched on October 1. It is testing key technologies and collecting data for the future launches of Chang'e III and Chang'e IV.
The telescope will be used for Very Long Baseline Interferometry or VLBI, a type of measurement of astronomical distances used in radio astronomy, as it can collect accurate data and increase its angular resolution during astronomical observation.
China's VLBI system is made up of four telescopes in the cities of Shanghai, Beijing, Kunming in southwest Yunnan Province, and Urumqi in the northwest Xinjiang Uygur Autonomous Region, as well as a data center in Shanghai.
Radio telescopes differ from optical ones in that they use radio antennae to track and collect data from satellites and space probes.
The first radio antenna used to identify astronomical radio sources was built by American Karl Guthe Jansky, an engineer with Bell Telephone Laboratories, in the early 1930s.




Tuesday, 30 October 2012

How to Brush Your Teeth, IF You Want White Teeth


Brushing your teeth serves a number of purposes: It whisks away food particles, cleans and massages your gums, helps to eliminate decay-causing plaque, and freshens your breath. While not a panacea for all dental
ills, brushing is an essential armament in the fight against decay, gingivitis, and periodontal disease.

Even though it's something most of us do every day, it doesn't hurt to get a refresher course on brushing, because using the proper brushing technique is just as important as vigilance.
Choose a routine and stick to it. Establishing a proper and habitual method of brushing your teeth will go a long way toward preventing dental caries and gum disease.
Always start in the same place in your mouth. This will help ensure that all parts of your mouth get cleaned every time. A good place to start is the hard-to-reach rear molars, which need the most time and attention.
Press gently at a 45-degree angle. Scrub the front of the tooth and gum for a few seconds using a small circular motion. In the same manner, move slowly around your mouth until you get to the other side. Pay particular attention to your gum line, because this is where gingivitis takes hold.
After you've worked your way to the other side of your mouth, rotate the brush so that it rests against the back of your tooth and gum, and use the same angle and same circular scrubbing motion as you return to the first tooth.
don't become a foolish after getting white teeth
.just smile for love and like.

Now You Can Whiten Your Teeth

Stained teeth in themselves are not really a health hazard, but they can be an annoyance. Even worse, they can prompt you to do damaging thingsin an attempt to whiten them.

Some stains can be removed by your twice-yearly cleaning, while others may require more aggressive treatment. Still other stains may be almost impossible to remove. The best way to keep your teeth their whitest is to avoid staining them in the first place.
A variety of factors can contribute to or cause stained teeth. Some of the more common tooth stainers are cigarette smoke, chewing tobacco, and habitual coffee and tea drinking. Extensive decay and dead nerves may also cause some discoloration. Plaque left by improper or infrequent flossing and brushing is a magnet for foods that stain (remember, plaque is sticky stuff). And, of course, age -- that notorious thief of beauty -- robs your teeth of their original brilliant white color, leaving them slightly yellowed.
Exposure to certain drugs (such as the antibiotic tetracycline) either in utero or as a small child, can leave teeth a pearly gray. Excessive childhood ingestion of fluoride may also cause the enamel to appear mottled and uneven. These types of stains are often the most difficult to remove, although they may improve somewhat with the aid of a professional bleaching.
Here are some ideas to brighten your smile:
Stick to your brushing and flossing regimen. (You knew that was coming, didn't you?) Once again, conscientious brushing and flossing win -- hands down -- as the best ways to prevent dental problems, including staining.
Avoid all forms of tobacco use, including pipes, cigars, chewing tobacco, and snuff.
Cut down on your intake of coffee and tea. The less contact these fluids have with your teeth, the less opportunity they will have to leave stains.
Disguise it. If you have a dark, highly visible amalgam filling (and a little disposable income), consider having it replaced with a tooth-colored plastic composite. A porcelain crown can also cover up a badly discolored or decayed tooth.
Treat yourself to an extra cleaning or two. Keep your teeth whiter (and your hygienist happier) by scheduling visits just for professional cleanings. Extra cleanings may help prevent long-term staining.
Get your teeth professionally bleached. Several excellent technologies have emerged for bleaching and whitening the teeth. Although some of these procedures must be performed in the dentist's office, a few can be done at home. Ask your dentist what he or she recommends.
The following are some definite tooth-whitening don'ts:
Don't take aggressive measures on your own. You may end up compounding your problem. If your teeth are heavily stained or discolored, consult your dentist.
Always consult your dentist before using an at-home whitening kit.
Never use any amount of chlorine bleach on your teeth. It is highly toxic.
Don't overdo it with "whitening" toothpastes. Some stain-removing toothpastes are quite abrasive and can wear off enamel if used too often. Consult your dentist or dental hygienist before using these toothpastes.
Your teeth need lots of care and attention to ensure life-long good oral health. Visit the links below for more information about protecting and caring for your teeth.
If you're not vigilant in your oral hygiene, an assortment of afflictions can attack your teeth and gums. Learn more in How Dental Disease Works.
Do you wish your teeth had just a bit more sparkle to them? How Tooth Whitening Works takes a look at procedures you can undergo to brighten your pearly whites.
When you have an ache in your teeth, getting rid of it is the only thought in your head. In How to Relieve a Tooth Ache, find out how to deal with dental distress.
This information is solely for informational purposes. IT IS NOT INTENDED TO PROVIDE MEDICAL ADVICE. Neither the Editors of Consumer Guide (R), Publications International, Ltd., the author nor publisher take responsibility for any possible consequences from any treatment, procedure, exercise, dietary modification, action or application of medication which results from reading or following the information contained in this information. The publication of this information does not constitute the practice of medicine, and this information does not replace the advice of your physician or other health care provider. Before undertaking any course of treatment, the reader must seek the advice of the

Miss Chinese Cosmos crowned

A total of twelve contestants participated in the finale of 2012 Miss Chinese Cosmos Pageant in south China's Hong Kong, Oct. 27, 2012. Zhang Ziqi from Australia Region claimed the crown






Chinese Liaoning back from maiden voyage

China’s first aircraft carrier Liaoning finishes the maiden voyage after its commission to navy, and goes back to the port of Dalian, Northeast China, on Tuesday morning.



World mahjong championshiop ground decorated iin Chongqing


World mahjong championship held in ChongqingThe third world mahjong championship started in Southwest China’s Chongqing municipality on Oct 28, 2012.The world mahjong championship is a
worldwide competitive event held by the World Mahjong Organization.Durin the championship participants will compete in individual, team and group events, implementing international mahjong competition rules.





Cruelty of Sandy slams U.S., at least 16 dead













The U.S. death toll from Sandy now stands at 16 after police in Pennsylvania said an 8-year-old boy died Monday after he was struck by a tree limb in Susquehanna County, Pennsylvania.

Though no longer a hurricane, "post-tropical" superstorm Sandy packed a hurricane-sized punch as it slammed into the Jersey Shore on Monday. Obama can not do any think against the Sandy slams .