1 . People tend to use trees for papermaking. But maybe electronics (电子) engineers are missing out on something here. “It turns out that two major building blocks of wood have a lot of electrical qualities,” says Magnus Berggren, a professor at Linköping University.

His team has been working to make parts for electronics from the forest. Right now, they’re focusing on two materials of trees. The first material is cellulose, which can make energy. Lignin, the second material, can store that energy, just as a battery does. The team has found when pressed, cellulose can produce electricity.

Some device must then store the electricity until it’s needed. Batteries can do this. But batteries aren’t very green. They have harmful materials. That’s where lignin comes in.

Batteries cause electrons to flow from one place to another, which can produce electricity. In a typical battery, one material must give electrons. The other must accept them. Lignin can do both. A weak acid (酸) encourages lignin to produce electrons. “With a metal wire (金属线) to guide those electrons, you’ll have electricity,” says Berggren.

Berggren’s team use this quality to create its new lignin-based battery. Typical batteries use a metal wire as a path to guide the flow of electrons into or out of the device. But since Berggren wants to make a battery of the forest, he looks for a natural way. Once again, he turns to cellulose.

This natural material can serve as a wire-like path for electrons. To make it work well, Berggren lines them with another chemical known as PEDOT, which isn’t from a tree. But when PEDOT is added to cellulose, they can conduct electricity like a wire. “With a weak acid, now you have a battery,” Berggren says. “And two of its three materials come from the forest.”

Berggren can imagine one day having mobile phone batteries made largely from forest products. Tree-based electronics might also be useful in lighting.

2 . Leah Brown aged 36 fell several hundred feet from Oregon’s highest mountain right before the eyes of a group of volunteer rescue workers who rushed to her aid and helped save her life.

The woman was coming down a popular path (小路) on Mt. Hood, about 70 miles east of Portland, on Saturday morning, according to the local police. Mt. Hood is the highest in Oregon, standing at around11.240 feet.

The fall was seen by members of Portland Mountain Rescue (PMR), a volunteer organization focused on helping people in mountainous areas. The group called 911 and rushed to the woman, providing medical care. They helped keep the woman warm for seven hours as the police worked to get her off the mountain safely. Finally, the woman was evacuated (转移) to a parking lot at 9:30 pm and taken to a hospital.

The climber, Leah Brown, said she didn’t know what caused her fall. “I can only guess it was either an ice tool or a crampon (冰爪) that didn’t land and stick like it should have, so I became detached from the mountain,” Brown said. “The thing I’d like to most stress is my appreciation for the members of PMR who evacuated me and took good care of me the whole time,” Brown added. “They saved my life. ”

In a statement after the rescue, PMR warned of the dangerous winter conditions at the mountain. “The short days and lower temperatures mean that the snow tends to be very hard and icy, and the conditions tend to be much steeper. Climbing the mountain in icy conditions is much more difficult,” the group said.

3 . The rise of digital technology has completely transformed the way students live their lives. From the way they socialize to the way they learn, digital technology has become a necessary part of campus life. Then how has digital technology transformed students’ campus life?

On the one hand, the use of social media has made it easier for students to keep in touch with their peers off campus. Platforms like Facebook, Instagram, and WeChat have become popular among students, allowing them to share their daily lives, engage in online conversations, and form virtual communities. Meanwhile, Digital technology has also changed the way students communicate with their instructors. With email and online chat platforms, students can easily contact their teachers for clarification on assignments, grades, and course content. This has improved communication between students and faculty, leading to a better learning experience.

On the other hand, digital technology has also revolutionized the way students learn. With online courses and virtual classrooms, students can access a variety of courses from the comfort of their own homes. This has opened up opportunities for students to pursue their passions and interests outside of their majors. Actually, it has made it easier to promote and participate in multiple campus events. Students can easily create online campaigns to promote events, organize events using online calendars, and even stream events live over the Internet. This has made it possible for more students to get involved and participate in various campus events.

Another benefit which is often ignored is its positive impact on their mental health. With online resources, such as anxiety apps and depression support groups, students can deal with stress and anxiety. They can seek help when in need, as online counseling services are available 24/7.

Digital technology has transformed campus life in numerous ways. While digital technology has brought many benefits, it has also raised concerns about its negative impact on student lives.

Tangshan, Hebei province, kicked off a tourism activity for night travelers on Hetou Old Street called the “Hebei Night Tour in Golden Autumn” event, which will last eight days starting on Friday(Sept.29). Travelers can enjoy a special kind of night beauty while exploring Hebei during the upcoming Mid-Autumn Festival and National Day holidays.

Foreigners living in Shanghai will gather at Loutang Ancient Town in Jiading on Friday to celebrate the Mid-Autumn Festival. During the event, people can engage in mooncake making as well as exploring other folk culture, such as Chinese shadow puppetry (皮影戏) and rabbit lanterns. They will also enjoy performances of Mid-Autumn Festival folk music while enjoying local traditional snacks.

Young Chinese living in France will seize an opportunity to introduce Chinese culture on Mid-Autumn Festival according to Chinese lunar calendar. Led by the Belleville Joint Chamber of Commerce Association (BJCCA) and supported by the Association d’Entraide à l’Entreprenariat Des Jeunes Chinois (AEEJC), the second annual Belleville Mid-Autumn Food Festival will offer an opportunity for French residents to enjoy true traditional Chinese tasty foods with a significant get-together cultural meaning.

5 . German Chancellor Olaf Scholz has dismissed concerns that growing Chinese competition is a threat to the local automotive industry, while welcoming Chinese carmakers to Europe’s largest auto show, IAA Mobility 2023, in Munich.

The six-day event officially opened on Tuesday. Scholz said increased competition from China was good for the German auto industry. “Fair competition stimulates business. It is in the interest of consumers,” he said, “as Chinese electric vehicle companies show eased several new fully electric models, out shining some German automotive giants.” Competition should stimulate us on, not scare us.

“The countries that have achieved great prosperity in the course of globalization, the workers there, have no less right and no less claim to the opportunities of modernity than we do,” Scholz said of China.

“In the 1980s, it was said (that) Japanese cars would overrun the market. Twenty years later, it was cars made in South Korea and now supposedly Chinese electric cars,” Scholz, who wore a black eye patch due to an injury from a jogging accident on Saturday, said.

The German chancellor also expressed confidence in his country’s strengths. “There is no question about the international competitiveness of Germany as a car country,” he said, adding that “Germany is still the linchpin of the auto industry and will remain so.”

Jun Jin, an auto industry expert, said the international market provides great opportunities for Chinese EV (电动汽车) makers, given their strength in technology and costs. “But this does not simply mean repeating their China success story; they need to succeed by adopting local practices,” Jun told China Daily.

Chinese companies, he said, still count on exports and have a long way to go before manufacturing vehicles overseas, arranging global supply chains and improving services for local customers.

7 . You may have heard video game characters deliver lines like “Shatter (击碎) the darkness with thunder!” But it’s refreshing to hear it in an unexpected place — the classroom. Xia Zhendong is a physics teacher working at a senior high school in south China. Now in his 30s, Xia has won the hearts of millions of online viewers with his classroom experiments.

In one video, Xia pointed a self-made “thunderbolt wand (魔杖)” toward a hanging light tube in his classroom and said, “Shatter the darkness with thunder.” Suddenly, an electric arc (弧线) emerged from the tip of the wand, illuminating the tube. After the cheers from his students, he went on to explain the science behind it—static electricity (静电) and point discharge (尖端放电).

“The idea came when I enjoyed playing a popular game on my smart phone,” he said. In his spare time, he likes to try out what students are interested in to get closer to them. Apart from the “thunderbolt wand”, Xia has done many other creative experiments. Once, he lit steel wool with a battery to show the heating effect of electric current. Another time, he used a “laser weapon” to pop balloons while explaining the principles of lasers.

For Xia, physics is supposed to be fun. So, when he saw his students struggle with physics, he decided to make a change. “Circuit diagrams (电路图) are abstract, and I want them to actually see the electricity through lightning to realize that knowledge is not just on paper. You can see it and even touch it,” Xia said. Now, Xia has also started free live classes online. “I hope that through online classes, more students can also have access to fun physics lessons. And their parents can also join in. I hope that physics could make them feel happier,” Xia said.