Self-driving vehicles will rely on cameras, sensors and artificial intelligence（AI）to recognize and respond to road and traffic conditions, but sensing is the most effective for objects and movement in the neighborhood of the vehicle. Not everything important in a car's environment will be caught by the vehicle's camera. Another vehicle approaching at high speed on a collision （碰撞）track might not be visible until it's too late. This is why vehicle-to-vehicle communication is undergoing rapid development. Our research shows that cars will need to be able to chat and cooperate on the road, although the technical challenges are considerable.

    Applications for vehicle-to-vehicle communication range from vehicles driving together in a row, to safety messages about nearby emergency vehicles. Vehicles could alert each other to avoid collisions or share notices about passers-by and bicycles.

    From as far as several hundred metres away, vehicles could exchange messages with one another or receive information from roadside units（RSUs）about nearby incidents or dangerous road conditions through 4G network A high level of A1 seems required for such vehicles, not only to self-drive from A to B, but also to react intelligently to messages received. Vehicles will need to plan, reason, strategize and adapt in the light of information received in real time and to carry out cooperative behaviours. For example, a group of autonomous vehicles might avoid a route together because of potential risks, or a vehicle could decide to drop someone off earlier due to messages received, a foreseen crowding ahead.

    Further applications of vehicle-to-vehicle communication are still being researched, including how to perform cooperative behaviour.

My dad was in the Air Force. When I was a kid, we moved every few years. That meant a lot of good-byes. It also meant getting used to a whole new community and a whole new school each time we moved. I can still feel what it was like to have to walk into the new school—that sinking feeling in my belly, that heaviness in my throat. It would always take time for me to learn how everything worked, what was cool and what not. It was always a struggle to find where I could fit in.

    Already shy, I didn't have much self-confidence in my friend-making abilities. I was the girl walking in the halls with her head down, panicking. When I spoke, you could hardly hear my soft voice. I was nervous and doubted myself a lot.

    It was very hard not having a history with everyone else. I was an outsider. But what I did have was soccer. Wherever I went, I knew that I could fit it with the soccer ball. The soccer team meant a familiar place and immediate friends for me. I could express myself and feel good about myself on the field. Playing hard helped to get rid of all my nervousness.

    Throughout our lives, our self-respect goes down when we feel like a failure, and it goes up when we feel successful. Doing something well, being praised, and feeling loved goes a long way. We all need to explore opportunities where we can be good at something and feel good about ourselves. Physical activity and sport participation is a terrific way to build up our sense of self-confidence and self-worth.

    A mother goat is able to pick out her own baby from its voice alone by the time the kid is just five days old.

    Researchers from University of London played kids' bleats to female goats and studied their responses. They were surprised to find that the animals were able to pick out their own kids' voices.

    “A mother and the kid rely a lot on smell to recognize one another and, in the wild, during the first week of their lives, the animals hide in grass and don't call much. It's a strategy they use to avoid enemies,” Dr Elodie Briefer, who led the research, explained to BBC News. “The mother call to the kids when she want them to come and feed, so we expected that kids would recognize the mothers' voices.” In fact, this was the case for deer, which also use this hiding strategy, although they do not belong to the same family of species as goats.

    She and her team recorded and played back young kids' calls to the female goats and recorded their responses. She explained, “Even when the calls came from kids that are five to six days old, we could see the mothers responding more to the voices of their own babies.” Hearing the voice of their own kids, the females would look towards the speaker that the sound was coming from, moving around and calling in response.

    The scientists say that understanding how goats behave and communicate is very important. “This helps us understand just how smart these animals are,” said Dr. Briefer. “Farmers might be able to change their way to raise goats considering this natural behaviour.”

    According to the Guinness World Records, a Sitka Spruce (锡特卡云杉) growing on New Zealand's southernmost island is the loneliest tree on Earth. Not only is it the only tree on Campbell Island, but the nearest other tree can be found over 200 km away on the Auckland Islands.

    Bluff, Campbell Island is one of the harshest places in the world. With strong winds blowing almost all year round and less than 600 hours of sunshine, it's not exactly a good place to live in, which is probably why, except for occasional visits by research scientists, it, has remained deserted for over half a century.

    It is believed that the Sitka Spruce on Campbell Island was planted by Lord Ranfurly, a former governor of New Zealand, sometime between 1901 and 1907. It's not clear why he decided to plant there, but according to some sources he said that the island was not productive, and took the first step to cover it with forestry. His idea was never going to work because of the harsh climate of the area, but somehow the Sitka Spruce survived.

    Apart from its reputation as the loneliest tree on Earth, the Sitka Spruce of Campbell Island has a series of other particularities. First of all its shape makes it look more like a giant cauliflower than a tree. This is believed to have been caused by repeatedly cutting down its trunk every year, for decades. Another interesting thing about the world's loneliest tree is that, though it is over 100 years old, it has never produced cones (球果).

    Who knew a lonely tree growing 200 km away from its nearest cousins could be so interesting?

    Even the hardest days contain lessons that will help you be a better person. Feeling down？Consider these things to remember when you're having a bad day.

    No one promised life would be perfect. If you look for perfection, you'll never be content. Don't condition your happiness on meeting every expectation you set for yourself. It is good to be ambitious，but you'll never be perfect. If you expect otherwise, your life will be filled with disappointments.

    Success doesn't happen overnight. Trees that are slow to grow bear the best fruit. Don't kid yourself into thinking success will come quickly. It isn't easy to be patient，but anything worth doing requires time. If you get frustrated, remind yourself why your goal is important.

    There is a lesson in every struggle. And once the storm is over，you won't remember how you made it through or how you managed to survive. But one thing is certain. When you come out of the storm, you won't be the same person who walked in. That's what this storm's all about. Don't complain about how terrible your life is. If you search for the lesson in your present struggle, you'll be able to make positive changes that would prevent similar situations in the future.

    Without hard times, you wouldn't appreciate the good ones. Strength does not come from winning. Your struggles develop your strengths. When you go through hardships and decide not to give in, that is strength. It is hard to find much to smile about when you fail, but how else would you improve yourself？If you look at failure as a part of your evolutionary process, you'll stay positive and pursue your goals for as long as it takes.

    Three-day－old Oskar Lunde sleeps in a small bed at an Estonian(爱沙尼亚) hospital.

    Across the room, his father turns on a laptop computer. "Now we will register our child, "Andrei Lunde says as he lifts his identification card into the card reader. His wife, Olga, looks on. And just like that, Oskar is Estonia's newest citizen. No paper. No time spent standing in a line.

    Estonia has launched a project to make government administration completely digital. The goal is to reduce the size of the government work force, open up the decision-making process and fuel economic growth.

    Need medicine? Reach for a computer and send an email or text message to a doctor. Need help from the local government? Click on a link to the government websites…

    Estonia has created a system that supports electronic authentication(身份验证) and digital signatures. It provides paperless communications for both the government and private industry.

    However, there are a few things that one cannot do electronically in Estonia: marry, end a marriage or buy and sell property. That is only because the government has decided it is very important to show up in person for some big life events. When Estonia declared independence from the former Soviet Union in 1991, it had to build a new economy. Government leaders looked for an industry where the country could compete. They decided on information technology and the Internet.

    When the poor country needed to replace a 1930s phone system, former President Toomas Hendrik Ilves rejected the offer of a free analog(模拟) system from Finland and argued for a digital one.

    Last year, information and communications made up 5.9 percent of the economy. The government hopes to increase that figure with an "e-residency" program that lets businessmen around the world register their businesses in Estonia, thus gaining a presence in the European Union. More than 51, 000 people from 167 countries have registered at a cost of only 100 euros, or＄114 each.