5 . As we all know, insects can be remarkably agile (灵活的) in flight. This is really hard to build into flying robots, but MIT Assistant Professor Kevin Yufeng Chen has developed an insect-sized drone (无人机) that approaches insects’ agility.

Typically, drones require wide open spaces. “If we look at most drones today, they’re usually quite big,” says Chen. “Most of their applications involve flying outdoors. The question is: Can you create an insect-sized drone that can move around in very crowded and complex spaces?”

According to Chen, he overcame many problems when building the drone. The insect-sized drone requires a fundamentally different construction from a larger one. The large drone is usually powered by a motor, but the motor loses efficiency as you shrink it. So, Chen says, “For an insect-sized drone, you need to look for alternatives.” The principal alternative until now has been employing a small, rigid actuator (执行器) built from new materials. Chen designed a more agile tiny drone using soft actuators instead of hard ones.

Each actuator can beat nearly 500 times per second and weighs just 0.6 gram, approximately the mass of a large bee. It gives the drone insect-like agility. “You can hit it when it’s flying, and it can recover,” says Chen. “It can also turn over in the air.” The drone looks a bit like a tiny cassette tape with wings, though Chen is also working on a new one shaped like a dragonfly.

Chen says his drone can be useful in industry and agriculture. It can perform machinery inspections to ensure safety and function. Its potential applications include completing search-and-rescue missions following a disaster. “All those things can be very difficult for existing large-scale drones,” Chen explains.

6 . I have always loved the Arthurian legend (传奇), as there is something quite special about King Arthur, and of course Merlin, my favourite character from the stories.

Death of an Empire is the second volume in MK Hume’s “Merlin” series which details Merlin’s life from birth. Merlin travels across the Roman Empire in search of his father, a voyage of discovery to understand just who he was. Eventually Merlin gets involved in the fight against the Hun’s invasion (入侵) of Europe at the Battle of the Catalaunian Plain.

Serving under the General Flavius Aetius, Merlin builds a reputation by saving the lives of thousands of soldiers. When he finally reaches Rome, he saves many more. But a far deadlier conflict between Emperor Valentinian and Senator Petronius Maximus is around the corner and Merlin must use all his strength to carry out his work.

If I had to choose just one word to describe this novel, there would be no other choice than “immersive (身临其境的)”. There has clearly been a serious amount of research carried out by the author. Combined with the descriptive prose and imaginative story, the book really does attract you from almost the very start. The story really does feel like you are a part of it as Merlin travels across the Roman Empire.

The author does a great job of mixing the rich history with established Arthurian legend. The battle scene is handled very effectively. The author employs a very effective form to show the main fight and this not only adds a degree of tension and a good level of excitement but almost makes you feel like you are right there hearing about what happened.

Death of an Empire is a very fine novel, a wonderfully rich tale and a rewarding story.

7 . Exploring Wildlife Conservation in Kenya

Day 1: Nairobi, Kenya

Arrive at the airport in Nairobi, where our staff will be on hand to drive you to the hotel. Enjoy the rest of the day at leisure.

Accommodation: Tamarind Tree Hotel

Day 2: Lewa Wildlife Conservancy

A charter flight (包机) brings us to Lewa Wildlife Conservancy, a 62,000-acre grassland on the north of Mount Kenya. Considered a model in the conservation field, this healthy wildlife habitat is home to a number of rare species, including the giraffe, the Grevy’s zebra, and African wild dogs. Lewa and the neighboring Borana Conservancy also harbor roughly 15 percent of Kenya’s entire rhino population.

Accommodation: Elewana Lewa Safari Camp

Day 3: Amboseli National Park

Fly by private charter to Amboseli National Park, where vast grasslands are irrigated by underground runoff streams from Mount Kilimanjaro. These landscapes provide a habitat for hundreds of elephants, making the park one of the best places in Africa to spot these large creatures. The travel begins on the drive to Tortilis Camp, set within view of Mount Kilimanjaro.

Accommodation: Tortilis Camp

Day 4: Masai Mara National Reserve

At first light, head out to track the animals that crossed the area during the night. This area has one of the highest concentrations of large predators (捕食性动物) in all of Africa. Then watch large groups of hippos in the Mara River and crocodiles sunbathing on the shore.

Accommodation: Kichwa Tembo Camp

8 . How to make a small talk

Whether you’re an introvert or extrovert, mastering how to use a small talk is very important if you attend social and networking events.

    1    

Paying attention to what the person is saying and putting your devices away are some of the gestures of expressing interest. Take this as an opportunity that has presented itself, so you can know each other better.

Be an active listener

    2     Even when you feel you have something to say, first give the other person the opportunity to speak. Do show them you are attentive by using non-verbal cues, such as eye contact and nodding.

Use open-ended questions.

Most people like to start the conversation by talking about their life and things. Using open-ended questions such as “    3    ”, “Where are you from?”, and the things they love doing is a great way of encouraging in-depth responses and provides an opportunity to learn more from one another.

Respond enthusiastically.

If it’s your turn to respond, make sure to do it enthusiastically. You’re talking to someone who doesn’t know you very well, and how you respond can go a long way in helping establish a great rapport(和谐)from the start.    4    

Be mindful of your body language.

Your body language can tell whether you are attentive to what your conversation partner is saying.    5     Even if you are an introvert, try to maintain body language that shows you’re interested in what they’re saying.

9 . Humans have a way of understanding others’ goals, desires and beliefs, a crucial skill that allows us to anticipate people’s actions. Taking bread out of the toaster? You’ll need a plate. Sweeping up leaves? You’ll grab the green trash can. This skill, often referred to as “theory of mind”, comes easily to us as humans, but for robots it still has a high mountain to conquer.

In a recent study, computer science researchers made the robot “watch” the human complete the task using a camera placed directly above the assembly(组装)area, looking down. To detect the parts operated by the human, the system used AprilTags, similar to QR codes, attached to the parts. Then, the system used machine learning to learn a person’s preference based on their orders of actions in the task. “Based on how a person performs the small assembly, the robot predicts what that person will do in the larger assembly,” said Nemlekar. “For example, if the robot sees that a person likes to start the small assembly with the easiest part, it will predict that they will start with the easiest part in the large assembly as well.”

In the researchers’ user study, their system was able to predict the actions that humans will take with around 82% accuracy. “We hope that our research can make it easier for people to show robots what they prefer,” said Nemlekar. “By helping each person in their preferred way, robots can reduce their work, save time and even build trust with them.”This technology could also be useful in industrial settings where workers are tasked with assembling products in large numbers, saving time and reducing the risk of injury or accidents. Additionally, it could help persons with disabilities to more easily assemble products and maintain independence.

“Our goal is not to replace humans on the factory floor. I expect similar findings in other applications as well,” said Nikolaidis. “A robot that can quickly learn our preferences can help us prepare a meal, rearrange furniture or do house repairs, having a significant impact on our daily lives.”

10 . It was a cold, sunny December day when I set out for a run in Moab, Utah, with my dog, Taz.

About an hour into my ________ along a remote canyon (峡谷) trail, I hit a patch of black ice (透明薄冰) and then ________ 60 feet into the canyon. I wasn’t paralyzed, but I was in great ________. Taz had managed to ________ his way back to me, so there must be a way out of the canyon, but I couldn’t ________ or even crawl.

I shouted for help and was intent on ________ myself to the bottom of the canyon. Every inch was an effort. It ________ me five hours to go a quarter of a mile. ________, it got so dark that I had to stay where I was for the night, next to a puddle (水坑) of water. At night the temperature dropped below ________. Taz stayed with me, ________ some warmth.The next morning, I couldn’t move at all. I tried to stay ________. The second night in the canyon seemed even ________ and colder. The puddle turned to ice, and I had to ________ it to get water.

On the third day, I felt myself growing weaker. I was coming to terms with the fact that I might ________. In a last ________ , I called Taz over and told him to go and get help. Taz took off through the canyon and I lay there thinking about my family and friends. There was more that I wanted from life.

Taz returned, ________ . Then I heard an engine in the distance. I cried with joy. It ________ that Taz had found a search and ________ team. I was airlifted to the hospital, where doctors found I had lost almost half the ________ in my body. If the rescue team had arrived later, I wouldn’t have ________ it. I was grateful to my faithful friend -Taz.