Someday, umbrellas may do more than just keep people dry. A researcher in the Netherlands has designed a simple sensor(传感器) that “listens”to rain. And that sensor can turn an umbrella into a rain-measuring expert.

Tools like this can let anyone gauge the weather. That can help scientists make sure that satellites and radar(雷达)systems that track storms are doing a good job.

“Rain radar is a beautiful way of seeing where rainfall is up in the air. But you never know where it hits the ground, "says Rolf Hut. He designed the umbrella sensor.

Researchers want to know how much rain makes it to the planets surface. Not all rain that falls from a cloud reaches the ground. And it can be difficult for radar and satellites to measure that rain, particularly in cities. A host of big buildings can change how air and rain move during a storm. “It also explains why a single, expensive sensor-the kind that might be found at an official weather station-won’t give accurate( 精确的 )city-wide data, Hut says. But by putting a low-cost rain measuring tool into people's hands, scientists can learn more about how much rainfall differs in these and other hard-to-measure places.

On the inside of the umbrella is a small, yellow disk (磁盘). It is the rainfall sensor. The sensor is attached to a black Bluetooth headset that sends the collected data to a smartphone.

Hut came up with the idea to stick the same type of sensor on an umbrella when he was talking to kids about science. He showed them a photo of a policeman who was holding an umbrella and talking to a crowd in a microphone. Why not put the two together? He thought it could make a cool rainfall sensor .

When a storm came through, Hut compared the umbrella’s new“ear”for rain to official rain measuring equipment. And to his delight, he found the umbrella's measurements were“pretty good. ” His next step is to improve the umbrella sensor to be more accurate

There are so many ways to explore in regard to finding new happiness. Below you’ll find some tips to help you find your idea of happiness.

Find a new hobby. When it comes to hobbies, the possibilities are endless. You can be as adventurous, creative, or outgoing as you want. You can try out a new hobby alone or with friends. Hobbies can help reduce stress and put our focus on what is fun and different 【小题1】

Put yourself first. A lot of people forget to take care of themselves because of a busy work schedule, marriage, kids and family. But remember when you put yourself first, your happiness will shine through for sure 【小题2】 This way, you can not only be your best self but also possibly take better care of people around you.

Exercise. Not everyone is a fan of exercise, but it does have so many benefits 【小题3】 A 30minutes’exercise helps your body to gain those “feel-good chemicals” to make you delighted and improve your health.

Eat a balanced diet There is a relationship between food and mood 【小题4】 A healthy balanced diet will make you stronger and happier. If you eat poorly, your organs (器官) will react negatively. As a result, you suffer from illnesses or have changeable moods you find it hard to control your feelings.

【小题5】 Having a good support system is known to help improve your well-being. Unluckily, not everyone means well. So it’s important to be aware of that and make friends with people beneficial to your mental health in your life.

Young people can have problems with their minds.【小题1】 Others have trouble getting on well with people like their parents and classmates.

Liu Wei is a junior 2 student from Hefei.【小题2】 He became so worried about it that he started to cut his finger with a knife.

Another student, 14-year-old Yang Fang, is from Guangzhou.【小题3】 She got very worried in one exam, and when she looked at the exam paper, she couldn’t think of anything to write.

A recent report from Jiefang Daily says about 18 % of Shanghai teenagers have mental problems. Their troubles include being worried and very unhappy, and having problems in learning and getting on with people. Many students who had problems won’t go for advice or help.【小题4】 Others don’t want to talk about their secrets.        

Liang Yuezhu, an expert on teenagers from Beijing Anding Hospital has the following advice for teenagers: