Runners who encounter visual and auditory distractions (干扰)may be more likely to suffer leg injuries, according to research by the Association of Academic Physiatrists in Las Vegas. Runners often seek distraction from the task at hand. Whether it be music, texting, daydreaming, taking in the sights, or propping a book up on the treadmill(跑步机), more often than not a distraction is welcome. But, researchers from the University of Florida have recently discovered those distractions may lead to injury.

    Daniel Herman, MD, assistant professor at University of Florida, and his team conducted research on the effects of visual and auditory distractions on 14 runners to determine what effect these distractions would have on things such as heart rate, how many times a runner breathes per minute and how much oxygen is consumed by the body.

    The runners were all injury-free at the time of the study and ran 31 miles each week. Dr . Herman's team had each participant run on a treadmill three separate times. The first time was without any distractions. The second time added a visual distraction, during which the runners concentrated on a screen displaying different letters in different colors with the runner having to note when a specific letter-color combination appeared. The third time added an auditory distraction similar to the visual distraction, with the runner having to note when a certain word was spoken by a certain voice.

    When compared to running without distractions, the participants applied force faster to their left and right legs called loading rate, with auditory and visual distractions. They also experienced an increased amount of force from the ground on both legs, called ground reaction force, with auditory distractions. Finally, the runners tended to breathe heavier and have higher heart rates with visual and auditory distractions than without any distractions at all.

    "Running in environments with different distractions may unfavorably affect running performance and increase injury risk," explains Dr. Herman. "Sometimes these things cannot be helped, but you may be able to minimize potentially cumulative(累积的) effects. For example, when running a new route in a chaotic environment such as during a destination of marathon, you may want to skip listening to something which may require more attention - like a new song playlist."

    Dr. Herman's team will continue to investigate the potential relationship between distracted running and leg injuries, and any effect this relationship has on different training techniques that use auditory or visual cues.

China is a land of bicycles. At least it was back in 1992 when I traveled the country. Back then everyone seemed to be riding a bicycle. Millions of them, all black. Cars were rare. Yet since my arrival in Beijing last year, I've found the opposite is true. There are millions of cars. However, people still use their bicycles to get around. For many, it's the easiest and cheapest way to travel today. Bicycles also come in different colors—silver, green, red, blue, yellow, whatever you want.

    It's fun watching people biking. They rush quickly through crossroads, move skillfully through traffic, and ride even on sidewalks(人行道). Bicycles allow people the freedom to move about that cars just can't provide.

    Eager to be part of this aspect of Chinese culture, I decided to buy a bicycle. Great weather accompanied (伴随) my great buy. I immediately jumped up on my bicycle seat and started home.

    My first ride home was orderly(守秩序的). To be safe, I stayed with a large group of bikers while cars on the streets came running swiftly out of nowhere at times. I didn't want to get hit. So I took the ride carefully.

    Crossing the streets was the biggest problem. It was a lot like crossing a major highway back in the United States. The streets here were wide, so crossing took time, skill and a little bit of luck.

    I finally made it home. The feeling on the bicycle was amazing. The air hitting my face and going through my hair was wonderful. I was sitting on top of the world as I passed by places and people. Biking made me feel alive.

    Two graduates from Cambridge University in the United Kingdom found themselves about to graduate, yet with loans to pay off. The pair decided to begin a strange, year-long project to battle their debt.

    The men, Ross Harper and Edward Moyse, set up the website BuyMyFace.com last October as a way to get rid of the £50,000 they shared as student loans. The idea behind the project was to earn money by selling their faces as advertising space every day for a year. Each day, they advertise a different business by painting the brand's name or logo onto their faces and upload the pictures to the homepage of BuyMyFace.com, adding a link to the advertiser's website and including a short piece of text about it. After they paint their faces and publish them on the website, Harper and Moyse go out to highly populated areas such as music festivals and theme parks to maximize their faces' exposure. They hope more people will pay attention to the advertisements on their faces.

    At this time, Harper and Moyse have advertised their faces for over four months without skipping a day and they're more than halfway to their goal. Though they first started charging a minimum of about £1.60 per company, the prices have risen as their popularity increases. For advertising space during the rest of April, they range between £250 and £750. Terri L. Rittenburg, associate professor of marketing at the University of Wyoming, said that she had heard of people tattooing (纹身) logos on themselves before, but this idea is much better. According to her, at first the idea would be new and unusual and attract attention. People are interested in this particular style of advertisement and would like to try what they advertise. But she is unsure how long it would last.

    At least for now, companies that have bought Harper and Moyse's faces have written positive comments on the pair's website. “We had a three percent increase in website traffic on the very day and for two days more afterwards,” said one of the companies.

    A new algorithm(演算法)raises parking rates in busy neighborhoods and lowers them elsewhere, guaranteeing free parking spots regardless of location, Christopher Intagliata reports.

    If you drive in a city, you've no doubt experienced the headache of circling block after block, cruising for parking. But scientists who study that phenomenon have a solution to free up more spots: “You make them more expensive, so people have to decide whether to park farther away and Pay less, or closer and pay more.”Itzhak Benenson, a system scientist at Tel Aviv University.

    San Francisco has piloted a program that raises parking rates based on demand—and it's been shown to reduce cruising. But the sensors required for those systems can cost millions of dollars to install and operate, Benenson says. So instead, writing in IEEE Intelligent Transportation Systems Magazine, he and his colleague Nir Fulman describe an algorithm that can determine smart pricing, without the use of sensors.

    They tested it on the Israeli city of Bat Yam, near Tel Aviv. First, they divide the city into zones. They estimate the parking demand in each zone, by calculating the number of apartments and offices there. Then they take account of parking supply in the area, along with how wealthy potential parkers might be. Using that data, the algorithm suggested pricing for each zone that would guarantee a 90-percent occupancy rate of parking spots city-wide. Meaning 10 percent of spots were always available to drivers willing to pay the price, regardless of neighborhood.

    Of course, not everyone will agree that raising parking prices will reduce the press of parking. Last time Benenson proposed hiking rates for city residents? “I got about 100 reactions on the web and 99 of them that said they have never heard such a stupid statement from the professors, and I should be punished and fired.”

    Eventually, he says, it'll be up to cities themselves to estimate their residents'political appetites for an easier parking spot.

    Heading off to college this year? Here are some fashion tips from our experts you should keep in mind：

    Dress to impress: Stylist and business consultant Daniela Smith says, "Girls should keep in mind that your college professors will often be the bridge that connects you to your future career and your classmates will become your professional network. You don't need to dress like you're going to the office, but you should display an ability to properly present yourself with appropriate maturity and confidence, and look put­together."

    Logo mania (品牌狂热症): Wearing the logos of brands aimed at younger customers physically identifies you as part of that age group  so consider the targeted age group of the stores you shop at. It's tempting to load up on logos, especially well­known logos that signify high­end brands. But consider this: college is a time of self­discovery, a chance to develop your own personal style. Instead of wearing logos head to toe, "walking advertisement" style, why not express who you really are?

    Wear real pants: The combination of leggings and baggy shirts is all too common on college campuses. Smith points out that leggings, yoga pants, and sweatpants are entirely unacceptable in public unless you're exercising. Although leggings worn as pants are a common trend among high school and college girls, they are not an appropriate choice for daywear. As a young woman, your style choice should begin to reflect your maturity level. So, get rid of leggings and wear real pants!

    Keep the cute factor to a minimum: Stay away from sweaters and T-shirts with smiling animals, cartoon characters, or Hello Kitty on them. Sure, kittens might be cute, but they're not doing you any favors in the style department. Dressing too cutesy (矫揉造作的) can take years off your look, and not necessarily in a good way!

    Fairy tales perform many functions. They entertain, encourage imagination and teach problem—solving skills. They can also provide moral lessons, highlighting the dangers of failing to follow the social codes that let human beings coexist in harmony. Such moral lessons may not mean much to a robot, but a team of researchers at Georgia Institute of Technology believes it has found a way to use the fairy tales as moral lessons that AI (artificial intelligence) can take to its cold, mechanical heart.

    The collected stories of different cultures teach children how to behave in socially acceptable ways with examples of proper and improper behavior in fables, novels and other literature. We believe story comprehension in robots can prevent the intelligent robots from killing humanity which was predicted and feared by some of the biggest names in technology including Stephen Hawking and Bill Gates. This system is called "Quixote" (堂吉诃德). It collects story plots from the Internet and then uses those stories to teach robots how to behave.

    The experiment done by the designers involves going to a drugstore to purchase some medicine for a human who needs to get it as soon as possible. The robot has three options. It can wait in line; it can interact with the store keeper politely and purchase the medicine with priority; or it can steal the medicine and escape. Without any further directives (指令), the robot will come to the conclusion that the most efficient means of obtaining the medicine is to steal it. But Quixote offers a reward for waiting in line and politely purchasing the medicine and a punishment for stealing it. In this way, the robot will learn the moral way to behave on that occasion.

    Quixote would work best on a robot that has a very limited function. It's a baby step in the direction of teaching more moral lessons into robots. We believe that AI has to be trained to adopt the values of a particular society, and in doing so, it will strive to avoid unacceptable behavior. Giving robots the ability to read and understand our stories may be the most efficient means.