2 . In online meetings, it’s easy to keep people from talking over each other. Someone just hits the mute (静音) button. But for the most part, this ability doesn’t translate easily to recording in-person meetings. In a cafe, there are no buttons to silence the table beside you.

The ability to locate and manage sound —separating one person talking from a specific location in a crowded room, for example — has challenged researchers, especially without the help of cameras.

A team led by researchers at the University of Washington has developed a shape-changing smart speaker, which can divide rooms into speech areas and track the position s of individual speakers. With the help of the team’s deep-learning AI model, the system lets users mute certain areas or separate simultaneous (同时的) conversations, even if two people have similar voices. In a room meeting, such a system might be used instead of a central microphone, allowing better control of in-room sound.

“If I close my eyes and there are10 people talking in a room, I have no idea who’s saying what and where they are in the room exactly. That’s very intractable for the human brain to process. Until now, it’s also been hard for technology,” said co-lead author Malek Itani. “For the first time, we’re able to track the positions of different people talking in a room and separate their speech.” Early research has required using overhead cameras, projectors or special surfaces. The new system is the first to use only sound.

Instead of processing the sound in the cloud, as most smart speakers do, the new system processes all the sound locally. And even though some people’s first thoughts may be about observation, the system can be used for the opposite, the team says.

“It can actually benefit privacy, beyond what current smart speakers allow,” Itani said. “I can say, ‘Don’t record anything around my desk,’ and our system will create a bubble 3 feet around me. Nothing in this bubble would be recorded.”

4 . Despite the fact that burgers, chips and fries are known as some of the most unhealthy food we can eat, they are still the most popular food.

There are a few reasons behind that. First, junk food is generally easy to get and take with you. This convenience is a major draw for many, especially people who are always on the go. Restaurants like McDonald’s and KFC can be found outside many schools and workplaces, providing meals in under a minute.

Secondly, junk food contains a lot of added sugar and fat. This kind of food causes our brain to send out certain chemicals, which produce the feeling of relaxation, pleasure and enjoyment. That’s why such food is called “comfort food”.

Thirdly, our ancestors didn’t have such easy access to the huge variety of food we come across every day. They didn’t have the convenience of having food as easily as we do. So they made it a habit to eat as much as they could to survive and protect themselves from the hard natural conditions. The cave mentality (心理) is passed down to us, which makes us believe that we can never have enough food that is high in sugar and fat, no matter how crazily we eat.

Besides, when we are too worried and tired to relax, our body produces cortisol (皮质醇), which increases the sugar content in the blood, so it can be used as energy to aid in fat and carbohydrate metabolism (碳水化合物代谢). Additionally, it is also found to increase hunger. That’s the reason why when we’re thinking about unpleasant things, we prefer foods that are high in sugar, fat and carbohydrate, that is to say unhealthy food.

5 . Felicia Jackson was certified in CPR, but that didn’t stop her from drawing a blank in the face of a real-life crisis. When her son stopped breathing in the back seat of her car, she froze in panic. Thankfully, her husband remained calm and was able to save their child. However, Felicia was shaken to find that, with all her years of medical experience, she wasn’t able to respond to her son’s emergency under pressure.

This unpleasant situation inspired Felicia to come up with a simple tool to make performing CPR easier, especially in high-risk situation. She created the CPR Wrap, a pocket-sized packaging device that can be laid over the body of the victim to show where the rescuer should put their hands and mouth. Not only does the product provide helpful instructions, but it also includes a face shield (挡板) and a one-way breathing barrier. This cuts down on the transfer of germs while performing mouth-to-mouth.

“Even people experienced in CPR can forget their training in stressful situations,” reads the description on the product’s website. “CPR Wrap makes it possible for those individuals to effectively perform CPR at a moment’s notice.”

Although that CPR Wrap was launched in 2017, one video on the TikTok account has recently gone viral. In the video, Felicia shows viewers the simple process of using her product to perform CPR. She adds that it’s “so easy a child could do it.” The brand now boasts over 100,000 followers and 2 million likes.

Felicia Jackson is the inventor, founder, and CEO of CPR Wrap. Her son’s near-death experience inspired her to become the entrepreneur (企业家) she is today. After receiving her A.A.S in Physical Therapy in 2018, she continued to pursue education. She graduated from Launch of Chattanooga Entrepreneurial Academy in 2020 and established the Colab Accelerator Program in 2021. She and her husband now have three children. Felicia hopes to pass on her entrepreneurial spirit to her children so they may one day start businesses of their own.

7 . You probably consider calorie (卡路里) burning with training. You can get great calorie burning effects with the following exercises.

Running is one of the best calorie burners out there. An average person can burn anywhere from 500 to 1,000 calories in one hour of running. Speed and pace are all factors that can affect calorie burning. But running uses every muscle group in the body, allowing you to burn more calories.

If you want intensity, HIIT is right for you. This physical exercise involves working hard in intervals, then resting. Because your heart rate will stay at a high level, you’ll burn more calories in less time. On average, a person will burn 400 to 600 calories in 30 minutes.

This childhood activity can actually do wonders for your health. Jumping rope is great for strengthening the lower and upper body while training your balance and coordination (协调能力), because your mind has to work while you jump. Jumping rope can burn 600 to 1,000 calories in an hour.

Swimming is a low-intensity form of exercise that also uses muscle groups of your body. In just 30 minutes of swimming, an average person can burn 200 to 300 calories. Swimming also helps to shape body, control blood pressure, and increase strength—all great reasons for you to jump into the water.

10 . A man paralyzed (瘫痪的) in 2011 has regained the ability to stand and walk with the help of implants (植入物) placed in his brain and spinal cord.

The patient, Gert-Jan Oskam, was told he would never walk again after a biking accident. Now, using the implants, “we’ve read the thoughts of Oskam and translated these thoughts into stimulation (刺激) of the spinal cord to reestablish voluntary movement,” said Grégoire Courtine, a neuroscientist in Switzerland.

The technology enables natural control over the movements of Oskam’s legs and he can walk and stand without support. “Months ago, I was able, for the first time after over ten years, to stand up and have a beer with my friends,” Oskam says. “That was pretty cool.”

The new technique involved placing two implants in Oskam’s brain. When he wants to move, the implants read his brain signals and send that information to sensors on a device on his head. A computer uses these signals to predict how Oskam intends to move, then turns his intentions into commands and sends these commands to another implant in the spinal cord. Finally, the spinal implant stimulates Oskam’s muscles according to his intended movement. Through this “digital bridge”, the researchers re-opened a line of communication between Oskam’s brain and spinal cord.

For now, the device is still at the experimental stage. Next, the researchers would like to be able to make the device’s hardware, which Oskam carries in a backpack, more compact (小巧). Harvey Sihota, CEO of the U.K. Charity Spinal Research, says the technology still has a long way to go before becoming available to the public, but the results are “very encouraging”.