During the cold winter days, there are some interesting festivals in the world. Look at the following ones.

    Harbin Ice and Snow Festival

    Place: China

    Time: January 5 to February 5

    People build incredible things out of ice and snow, decorating them with lights.

    The Carnival of Venice

    Place: Italy

    Time: between February and March

    One of the most beautiful festivals in the world, people wear masks and elaborate costumes to hide differences among classes, and there are contests for the best costumes.

    Holi Festival

    Place: India

    Time: late February/ March, on the last full moon day

    Hindus and Sikhs, in India, Nepal, and Sri Lanka celebrate the main day of this incredibly fun 16-day festival by throwing colored powder and water at each other.

    Sundance Film Festival

    Place: Utah, the US

    Time: end of February

    The largest independent film festival in the US. Watch both feature films and shorts. You need to buy a ticket.

    Healthy eating doesn't just mean what you eat, but how you eat. Here is some advice on healthy eating.

    Eat with others. It can help you to see others' healthy eating habits. If you usually eat with your parents, you will find that the food you eat is more delicious.

    Listen to your body. Ask yourself if you are really hungry. Have a glass of water to see if you are thirsty—sometimes you are just thirsty, you need no food. Stop eating before you feel full.

    Eat breakfast. Breakfast is the most important meal of the day. After you don't eat for the past ten hours, your body needs food to get you going. You will be smarter after eating breakfast.

    Eat healthy snacks like fruits, yogurt or cheese. We all need snacks sometimes. In fact, it's a good idea to eat two healthy snacks between your three meals. This doesn't mean that you can eat a bag of chips instead of a meal.

    Don't eat dinner late. With our busy life, we always put off eating dinner until the last minute. Try to eat dinner at least 3 hours before you go to bed. This will give your body a chance to digest most of the food before you rest for the next 8—10 hours.

    Chinese high school students have the longest study hours compared to their peers (同龄人) in Japan, the US and the Republic of Korea, a survey conducted by the four countries said.

    The survey, released by the China Youth and Children Research Center (CYCRC) on Monday, was jointly conducted with institutions in the four countries in September—October of 2008. It covers nearly 4, 000 students in senior high schools and vocational high schools in the four countries.

    About 78.3 percent of Chinese students said they spend more than eight hours at school and 56.7 percent said they study at least two more hours each day at home. By contrast, only 24.7 percent of their peers in the US, 20.5 percent in Japan and 15.4 percent in Korea study more than two hours after school.

    Around 60 percent of all students surveyed said their burden for studies was the heaviest; however, the Japanese felt their burden was the worst with respondents (应答者) reaching 79.2 percent.

    Among the five biggest headaches for young people in the four countries were: over—scheduling ranked first, followed by a boring leisure life, unsatisfied appearance, little time for exercise and making friends, and no spare money.

    "Moderate (适度的) study pressure can better drive students to develop, however, too much will squeeze (挤) their development space, and can even cause harm to their physical and psychological health," the survey said.

    "Balancing their studies and all-round development is a very important task," it said.

A pair of researchers with Leibniz University of Hannover has demonstrated the means by which robots might be programmed to experience something similar to pain in animals. As part of their demonstration at last week's IEEE International Conference on Robotics and Automation held in Stockholm, Johannes Kuehn and Sami Haddaddin showed how pain might be used in robots, by interacting with a BioTac fingertip sensor on the end of a Kuka robotic arm that had been programmed to react differently to differing amounts of pain.

The idea of developing an artificial robot nervous system may seem contrary to all expectations, but Kuehn says doing so is important in the same way that it is good for humans to feel pain. "Pain is a system that protects us, "says Kuchn. "When we avoid the source of pain, it helps us not get hurt. "So when robots can feel and react to pain, they will become smart enough to avoid it. The more dangerous the robot registers the threat to be, the faster it will withdraw and avoid the source of danger. Additionally, Kuehn and Haddadin say humans working alongside robots that feel pain, especially those in heavy machinery, will be protected around them.

They have tested out some of their ideas using a robotic arm with a fingertip sensor that can detect pressure and temperature. It uses a robot-tissue patch(小片)modeled on human skin to decide how much pain should be felt and thus what action to take. For example, if the arm feels light pain, it slowly withdraws until the pain stops, and then returns to its original task; severe pain, meanwhile, causes the arm to go into a kind of lockdown mode until it can get help from a human operator.

Such robots are likely to raise a host of questions, of course, if they become more common —if a robot acts the same way a human does when touching a hot plate, are we to believe it is truly experiencing pain? Only time will tell of course, but one thing that is evident, Kuehn and Haddadin's work could lead to robots that are more human-like than ever.

At just seven years old, Angelina Tsuboi discovered her passion for innovation. It all began with a simple game she programmed in her Los Angeles public school's Grade 2class. Today , at18, the Grade 12 student's initial curiosity has evolved into a deep-seated desire to use technology to decode (解码) real-world problems. 

In 2021, she co-developed Megaphone, one of her first apps, to tackle unanswered post-class questions and poor communication about events and announcements. Her problem-solving ability kept building from there. 

When she took online CPR classes at the start of the pandemic, she figured it couldn't be just her who was struggling with the steps. So she created an app called CPR Buddy ― a winner in the 2022 Apple Swift Challenge ― which guides users through CPR using vibrations (震动) to regulate breath. After winning the award, Angelina presented her work to Apple CEO Tim Cook, a highlight in her young career, but one she didn't lose her cool over. "There's no point putting people on a pedestal (神坛)," she says. 

The next year, Angelina built an app called Lilac, designed to assist nonEnglish-speaking single parents with resources for housing, job opportunities and translation support. She was inspired by her own experiences as a child of a single mother who immigrated to the US. 

When Angelina decided to pursue pilot training at the age of 16, she was struck by how difficult it was to find financial support, which encouraged her to create yet another app, Pilot Fast Track, which helps those longing to be pilots find scholarships for flight training. 

Looking to the future, besides applying to colleges with great labs, Angelina is exploring the field of aerospace cybersecurity and mechatronics ― combining computer science, electrical engineering and mechanical engineering. 

"There's not enough optimism in the world," she says. "I have also been in situations in my life where I've lost a lot of hope. But in the end, it is a mindset, and there are ways in any situation you're in to make it somewhat better. "