In France, a man walks on what can only be described as a human-sized hamster wheel. The wheel moves around and around, as the man keeps walking. What is he doing? He is lifting a heavy object to the top of a tower the same way workers moved such objects 800 years ago.

    In the 13th century, workers did not have the 100-meter tall cranes they now use to build tall buildings. So they had to be creative and come up with simple machines to get their work done.

    The man on the large wheel is walking at a reasonable speed. The wheel turns and pulls a rope connected to a pulley(滑轮)at the top of the tower. Another rope tied to the pulley lifts supplies from the ground.

    This is just one way skilled craftsmen arc building a 13th-century castle without using modern tools. Crew have been working on the castle since 1997. It is being built in the Burgundy area of central France. Organizers expect the work to last another 10 to 15 years. That means it will take close to 30 years to finish the project.

    The crew are making progress at about half the speed of the workers from 800 years ago. That is because many of them are accustomed to using modern tools. When the crew use heavy chisels(凿子）and hammers to break rock, as they did hundreds of years ago, they are learning as they go. The goal of the project is to learn more about old building techniques in case they might be of use today.

    Clement Guerard, 44,is a stonemason; he cuts and builds with stone. He has been working on the tower for 17 years. He said one way he is able to work on something like this for so long is by forgetting “some of the pace of modern life", he is able to adapt to working by hand.

    When I was a kid in the 1960s, my parents had a country store in the small town of Frankfort, Maine. No neighboring houses could be seen From our place， and new salesmen were always amazed at the amount of business we did. Dad's motto was, “We sell everything.” If he didn't have something in store, he would pick it up for customers on his weekly trip to Bangor.

    One time Dad was in Bangor getting shoes for someone at a shoe factory, He saw big boxes full of shoes and asked about them. They were the mates(一双鞋中的一只) to faulty shoes that had been thrown away. He looked through the boxes and realized that there were usable brand-new shoes in there. He offered the manager five cents a shoe, Dad made the deal and got the manager to reserve any future boxes for him.

    Of course Mon, his business partner, was more practical, and her first reaction was, “But what are you going to do with them?” Dad bought an old school bus. He cleaned it up, removed the seats and placed big containers down both sites of the aisle(通道). When all was ready, the whole Family helped to put the shoes in place. At first， it looked like we had plenty of room on the bus, but Dad kept bringing home more boxes.

    There was no sign on the Shoe Bus. 'The only advertising Dad did was to place a piece of paper beside the store exit that read “Shoes $1 a pair. "When folks asked about the deal. They learned it wasn't that easy because they had to find their own pairs. The attraction was a combination of getting a good deal on a quality pair of shoes and the thrill of the hunt.

    To this day I still run into people who talk about the fun they had searching for pairs in Dad's Shoe Bus.

    Some houses are designed to be smart. Others have smart designs. An example of the second type of house won an Award of Excellence from the American Institute of Architects.

    Located on the shore of Sullivan's Island off the coast of South Carolina, the award-winning cube-shaped beach house was built to replace one smashed to pieces by Hurricane（飓风）Hugo 10 years ago. Before Hugo, many new houses built along South Carolina's shoreline were poorly constructed, and enforcement of building rules wasn't strict, according to architect Ray Huff, who created the cleverly-designed beach house. Soon after Hugo, all new shoreline houses are required to meet stricter, better-enforced rules. The new beach house on Sullivan's Island should be able to withstand a Level 3 hurricane with peak winds of 179 to 209 kilometers per hour.

    At first sight, the house on Sullivan's Island looks anything but hurricane-proof. Its redwood shell makes it resemble “a large party lantern (灯笼)” at night, according to one observer. But looks can be misleading. The house's wooden frame is reinforced with long steel rods to give it extra strength.

    To further protect the house from hurricane damage. Huff raised it 2.7 meters off the ground on timber pilings－long, slim wood pieces anchored deep in the sand. Pilings might appear insecure, but they are strong enough to support the weight of the house. They also raise the house above storm waves. The pilings allow the waves to run under the house instead of running into it. 'These waves come ashore at terrible speeds and cause most of the damage done to beach-front buildings,” said Huff.

    Huff designed the timber pilings to be partially hidden by the house's ground-to-roof shell. “The shell masks the pilings so that the house doesn't look like it's standing with its pant legs (裤腿) pulled up,” said Huff. In the event of a storm, the shell should break apart and let the waves rush under the house, the architect explained.

    Have you ever been afraid to talk back when you were treated unfairly? Have you ever bought something just because the salesman talked you into it? Many people are afraid to speak out for their rights. Dr Robert Albert, author of Stand Up, Speak Out, and Talk Back thinks it's because their self-respect is low.

    But Albert and other scientists are doing something to help people help themselves. They offer "assertiveness training" courses A. T. for short. In the A.T. Course people learn that they have a right to be themselves. They learn to speak out and feel good about doing so. They learn to help themselves without hurting other people.

In one way, learning to speak out is to get rid of fear. A group taking an A. T. Course will help the shy person to lose his fear. But A. T.uses an even stronger motive— he needs to share. The shy person speaks out in the group because he wants to tell how he feels. Whether or not you speak up for yourself depends on your self-respect. If someone you face is more "important" than you, you may feel less of a person. You start to doubt your answers to problems. You can get to feel good about yourself. And once you do you can learn to speak out.

    When you are sitting in class, have you ever drawn pictures in the margins (页边的空白处) of your notebooks? If so, you are doodling. Many people think of doodling as a distraction (分心) from more important things. But it might be just the opposite.

    One study shows that doodling may help you remember things you hear 29% more. Besides, doodling can help you think creatively. Walking away from a problem to draw might actually help you solve it. When you come back, you'll have a fresh perspective and figure out an answer more quickly.

    An author named Sunni Brown wrote a book on doodling. She argues that doodling is a tool that can help people think. In fact, she runs a business that helps companies improve organization and planning through doodling. Brown believes doodling is helpful because it includes many ways of learning. You learn in four ways: seeing, hearing, reading or writing, and through movement. The more ways you use, the better you learn. And when you doodle while listening to a lecture, you use all four.

    You might think that being good at drawing is important for doodling. But if the point of doodling is to help you think, then it doesn't matter what the picture looks like. Even if you're not an artist, doodling can help you. So next time you need help focusing, pick up a pen and doodle away!

Advances in generative artificial intelligence (AI) have enabled authentic-sounding speech synthesis (语音合成) to the point that a person can no longer distinguish whether they are talking to another human or a deepfake (深度伪造). If a person's own voice is "cloned" by a third party without their agreement, bad guys can use it to send any message they want.

Computer scientist and engineer Ning Zhang has developed a new method to prevent unauthorized speech synthesis before it takes place: a tool called AntiFake.

Traditional deepfake detection methods only work after the damage is done. However, AntiFake prevents voice data from being synthesized into an audio deepfake beforehand. This tool turns the tables on cybercriminals (网络罪犯) by using similar voice cloning techniques they employ, but for voice protection. The software complicates voice data extraction and feature identification crucial for voice synthesis. "We're using an opposite AI technique originally used by cybercriminals, but now we're using it against them," Zhang explained. "We slightly change the recorded audio, just enough to make it unusable for voice clone training while still sounding natural to humans."

Ben Zhao, a professor of computer science at University of Chicago, says that the software, like all digital security systems, will never provide complete protection. But, he adds that it can raise the bar and limit the attack to a smaller group of individuals with significant resources.

AntiFake can already protect shorter voice recordings against cloning. The creators of the tool believe that it could be extended to protect larger audio documents or music from misuse. But the methods and tools that are developed must be continuously adapted because cybercriminals will learn and grow with them.