Computers have beaten human world champions at chess and, earlier this year, the board game Go(围棋). So far, though, they have struggled at the card table. So we challenged one AI(artificial intelligence) to a game.

Why is poker so difficult? Chess and Go are “information complete” games where all players can see all the relevant information. In poker, other players' cards are hidden, making it an “information incomplete” game. Players have to guess opponents' hands from their actions—-tricky for computers. Solving poker could lead to many breakthroughs, from cyber security to driverless cars.

    Scientists believe it is only a matter of time before AI once again vanquishes humans, so our human-machine match comes up in a game of Texas Hold's Em Limit Poker. The AI was developed by Johannes Heinrich, a researcher studying machine learning at UCL. It combines two techniques: neural(神经的)networks and reinforcement learning(强化学习).

    Neural networks, to some degree, copy the structure of human brains: their processors are highly interconnected and work at the same time to solve problems. They are good at spotting patterns in huge amounts of data. Reinforcement learning is when a machine, given a task, carries it out, learning from mistakes it makes. In this case, it means playing poker against itself billions of times to get better.

    Mr Heinrich told Sky News: “Today we are presenting a new procedure that has learned in a different way, more similar to how humans learn. In particular, it is able to learn abstract patterns, represented by its neural network, which allow it to deal with new and unseen situations.”

    After two hours of quite defensive play, from the computer at least, we called it a draw.

    In the mid-2000s, Waze Mobile co-founder Ehud Shabtai received a cutting-edge (尖端的) gift from girlfriend: a GPS. The expensive gift was supposed to be helpful. But straight out of the box, it was already out of date.

    Shabtai, a coding enthusiast, had an immediate reaction to reinvent. Shabtai's solution? To build an app. With 80 million monthly active users globally and nearly 400,000 superusers who function much like Wikipedia volunteer editors (editing maps rather than words), Waze Mobile caught the eye of Google as a revolutionary approach to navigation (导航).

    Acquired by Google in 2013, Waze's value mainly lies in its high rate of user involvement. Unlike traditional navigation apps that simply show directions, Waze asks its users to report accidents and other road conditions in real time, so other users can avoid the traffic by using an alternative route.

    The goal behind Waze's approach is an ambitious one: not just avoid traffic, but end it altogether. Waze is finding new ways to put its loyal and active user base to use to make that vision a reality, including a plan to make carpooling (拼车) cool.

    To be sure, traffic jams are troubling people all over the world. Waze has been quietly ahead of the game for some time. In 2013, when Waze was just a small digital-mapping business with limited resources it had something Google Maps and other competitors didn't: richer GPS guidance thanks to its stream of live traffic reports from users.

    These users were the basis of Shabtai's plan to solve for his GPS device's “silent” hardware: he grounded the app in software that could be perpetually updated by users, anywhere and anytime.

    Waze Carpool is going straight to the heart of traffic jams, trying to get more drivers off the road and into carpools. The app has already connected tens of thousands of rideseekers with drivers willing to ferry them along a shared route, and that trend could be the answer to a traffic-free future.

A Competitive Sport

    Cheerleading

    Over the years, cheerleading has taken two primary forms: game-time cheerleading and competitive cheerleading. Game-time cheerleaders' main goal is to entertain the crowd and lead them with team cheers, which should not be considered a sport. However, competitive cheerleading is more than a form of entertainment. It is really a competitive sport.

    Competitive cheerleading includes lots of physical activity. The majority of the teams require a certain level of tumbling (翻腾运动) ability. It's a very common thing for gymnasts, so it's easy for them to go into competitive cheerleading. Usually these cheerleaders integrate lots of their gymnastics experience including their jumps, tumbling, and overall energy. They also perform lifts and throws. This is where the “fliers” are thrown in the air, held by “bases” in different positions that require strength and working with other teammates.

    Competitive cheerleading is also an activity that is governed by rules under which a winner can be declared. It is awarded points for technique, creativity and sharpness. Usually the more difficult the action is, the better the score is. That's why cheerleaders are trying to experience great difficulty in their performance.

    Besides, there is also a strict rule of time. The whole performance has to be completed in less than three minutes and fifteen seconds, during which the cheerleaders are required to stay within a certain area. Any performance beyond the limit of time is invalid.

    Another reason for the fact that competitive cheerleading is one of the hardest sports is that it has more reported injuries. According to some research, competitive cheerleading is the number one cause of serious sports injuries to women. Emergency room visits for it are five times the number than for any other sport, partially because cheerleaders don't use protective equipment. Smiling cheerleaders are thrown into the air and move down into the arms of the teammates, which may easily cause injuries. Generally, these injuries affect all areas of the body, including wrists, shoulders, ankles, head, and neck.

    There can be no doubt that competitive cheerleading is a sport with professional skills. Hopefully, it will appear in the Olympics since cheerleaders are just as athletic and physically fit as those involved in the more accepted sports. It should be noted that it is a team sport and even the smallest mistake made by one teammate can bring the score of the entire team down. So without working together to achieve the goal, first place is out of reach.

    Basketball Statistician Help Wanted

    The Athletic Department is looking for students to help assist staff during the Fall 2016, Winter 2016-17 and Spring 2017 semesters. Students in this position will be keeping live statistics during basketball games. Students must meet all of the following requirements:

    Good computer skills

    Available evenings and weekends

    Knowing basketball rules and statistics

    Students interested in working for the Athletic Department should contact the Athletic Coordinator at their respective(各自的) campuses.

    TP/SS Athletic Coordinator, Michael Simone, 240-567-1308

    Rockville Athletic Coordinator, Jorge Zuniga, 240-567-7589

    Springfield Athletic Coordinator, Gary Miller, 240-567-2273

    Germantown Athletic Coordinator, GauriChavan, 240-567-6915

    A Canadian woman who lost her diamond ring 13 years ago while cleaning her garden on the family farm is wearing it proudly again after her daughter-in-law pulled it from the ground or a carrot.

    Mary Grams, 84, said she can't believe the lucky carrot actually grew through and around the diamond ring she had long given up hope of finding. She said she never told her husband, Norman, that she lost the ring, but only told her son. Her husband died five years ago.

    "I feel glad and happy," Grams said this week. "I grew into the carrot. I feel it amazing."

    Her daughter-in-law, Calleen Daley, found the ring while getting carrots in for supper with her dog Billy at the farm near Armena, Alberta, where Grams used to live. The farm has been in the family for 105 years. Daley said while she was pulling the carrots and noticed one of them looked strange. She almost fed it to her dog bu decided to keep it when she was washing; the carrots she noticed the ring and spoke to her husband, Grams'son, about what she had found.

    They quickly called Grams. "I told her we found her ring in the garden. She couldn't believe it, "Daley said." It was so strange that the carrot grew perfectly through that ring."

    Grams said she wanted to try the ring on again after so many years. With her family looking on, she washed the ring with a little soap to get the dirt off. It moved on her finger as easily as I did when her husband gave it to her.

    "We were laughing," she said. "It fits. After so many years it still fits perfectly."

Earth's next superpower

The following countries have been sitting on hidden talents. And now they're about to fly.

NIGERIA (尼日利亚)

Nigeria says it pumps out as much oil as the other two oil-producing countries, Kuwait and Iraq. All this oil is cycling cash into the Nigerian economy and creating extremely rich businessmen. Analysts say that if Nigeria can improve its schools and technology, it could balloon into the world's 13th largest economy by 2050, right between Turkey and Italy. If that reason is not enough for optimism, Nigeria's president also has the sunniest name of any world leader: Goodluck Jonathan.

VIETNAM

As agriculture has given way to industry, unemployment in Vietnam has dropped. What's Vietnam's trick? It's ready to work. Other countries' laborers aren't as cheap as they used to be, which makes Vietnam a relative bargain for companies that need new factories abroad. However, the country has almost no railroads, its highways are in poor condition, and its largest city has just one airport, which was built before the Vietnam War. So what's the use of producing export-ready goods if there's no convenient way to ship them? The good thing is that, however, officials are widening highways, building a new airport and so on.

CHILE (智利)

Pipes, computers, motors, and your microwave all have one thing in common: They're made with copper (铜). Copper makes the world go round. And luckily for Chile, it's got about a third of the planet's copper supply. It just needs a way to dig it up and the government is pouring money into the country's mines.