D

    University graduates Mallorie Brodie and Lauren Hasegawa, who invented a smartphone app that tracks construction defects for commercial builders, had a tiger by the tail.

    Bridgit, which they founded in 2012, launched a cloud-based communications platform that helped manage defects on construction sites, which can delay projects and result in costly repairs if left unchecked. The smartphone application lets site supervisors take photos of cracks or damaged paint, share them with employees and track the problems to solution.

    More than 600 subcontractors used the pilot version in many building sites before the commercial version, called Closeout, officially launched.

    Feedback(反馈)was so good that they began to wonder: Why limit their invention to a specific industry? Why not turn it into some kind of a handy tool for consumers too? This became their dilemma. In other words, should they stay the course or look for wider applications of their app?

    The experts polled all agreed Bridgit should stay focused on its original goal. Ms. Hasegawa and Ms. Brodie took that advice.

    As more business customers signed on, it became clear that they made the right decision. Since then, the company's growth has been rapid.

    Earlier this year, Bridgit launched Closeout ,which is designed so that even the least tech-savvy can use it easily. Today, the app is being used on sites across Canada and the United States and even by top general contractors.

    In October, Bridgit was named to the Canadian Innovation Exchange's top 20 list of Canada's most innovative (创新的) companies working in digital media and information and communication technology .

    But Ms. Hasegawa and Ms. Brodie are not resting on their glories. They have also been collecting feedback on Closeout from customers, and they'll launch a new version in the spring. It will target not only general contractors but developers and building owners, too.

Lisa: My best teacher is my geography teacher in 10th grade. Why? Because we did school projects! Back then I wrote about India and never forgot what I had learned. He brought the culture to life by letting me become part of it. He also listened to us and was always ready with a kind word.

David: My best teacher is my high school social studies and history teacher, Thomas Ladenburg. He respected us, though we were just teenagers. His class was never boring because he often asked us to discuss in class. He used his own materials which made the class very interesting.

Henry: My best ever teacher is my biology teacher in high school. I really liked her class. She explained everything very clearly. She also checked our notebooks to make sure we had written down what she said. Now, many years later, I can still remember a large part of the things she taught!

Susan: The best teacher I have ever had is my 10th grade social studies teacher. She was always in a good mood and kept us laughing. She was really young, so she acted like us teenagers, which made learning fun. If we needed to talk to an adult about a problem, we would always come to her because we knew she could help us.

Tom: My favourite teacher is Mr. Yelle. He taught us math, science and music. He spoke to us “at eye level”, and was very patient and kind. We did great projects for the science fairs. Forty years later, I still remember his lessons very well. By the way, though he was called Mr Yelle, he didn't yell(喊叫).

    Try this: For an entire day, forget about the clock. Eat when you're hungry and sleep when you're tired. What do you think will happen?

    You may be surprised to find that your day is much like most other days. You'll probably get hungry when you normally eat and tired when you normally sleep. Even though you don't know what time it is, your body does.

    These patterns of daily life are called circadian rhythms, and they are more than just habits. Inside our bodies are several clocklike systems that follow a roughly 24-hour cycle. Throughout the day and night, our internal clocks direct changes in temperature, body chemicals, hunger, sleepiness and more.

    Everyone's rhythms are unique, which is why you might like to stay up late while your sister always wants to go to bed early. But overall, everyone is programmed to feel tired at night and energetic during the day.

    Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal（内部的） clocks. Now, new discoveries are giving scientists insights into how these clocks work.

    Learning about our body clocks may help scientists understand why problems arise when we act out of step with our circadian rhythms. For example, traveling across time zones can make people wake up in the middle of the night. Regularly staying up late can make kids do worse on tests and quizzes. And working shifts at night leads to higher rates of heart disease, diabetes and obesity.

    “There is a growing sense that when we eat and when we sleep are important parts of how healthy we are,” says Steven Shea, Director of the Sleep Disorders Research Program at Brigham and Women's Hospital in Boston.

    Scientists still aren't sure why the timing of sleep matters so much, Shea says. But research findings suggest that our circadian rhythms are more important than we give them credit for.

    “During the night, we are prepared to sleep,” Shea says. “During the day, we are prepared to eat and move around. If you reverse (颠倒)what you are doing, everything is out of phase. That can have unfavorable consequences.”

    In 1880, fourteen-year-old Matthew Henson loved to hear sailors tell tales of their exciting lives at sea. The travel, the adventure, the danger, and the steady pay were all attracting young Henson. One day, he found a job as a cabin boy on a beautiful ship called the Katie Hinds. For the next five years, Henson sailed around the world. With the help of the ship's captain and other members of the crew, Henson learned mathematics, navigation, history, geography, and many other subjects. By the time he left the Katie Hinds in 1885, Henson was well educated and had become an excellent seaman.

    Unable to find work anywhere else, Henson took a job in a hat shop in Washington, D.C. One day in 1887, a man came in to buy a hat. The man, Robert Peary, asked the owner if he knew anyone with experience at sea. Peary would soon travel to South America for the U.S. government. He needed experienced men to accompany him. The shop owner knew about his young employee's skills and experience on ocean journeys, so he introduced Peary to Henson.

    Using his map-reading and sailing skills, Henson proved himself to be a worthy and smart seaman. Peary soon made Henson his assistant（助理）, and they became close friends. One day Peary told Henson about his real dream: to be the first man to stand on “the top of the world” at the North Pole. He asked Henson to help him make his dream come true. Over the next five years, the two explorers made two trips together to the Arctic. However, they were not able to reach the pole either time. The cold, wind, and ice were worse than either of them had ever imagined.

    In 1908, Peary and Henson were ready to make their final attempt at reaching the North Pole. Both men were over forty years old. The years of hardship in the arctic cold had made them suffer a lot. This would be their last chance. With four Inuit（因纽特）guides, they made a mad rush straight across the ice toward the pole. Peary's feet were injured and he had to be pulled on a dogsled. In April 1909, Henson's instruments showed they were standing at the North Pole. Together Henson and Peary planted the American flag in the snow.

    In later years, Robert Peary and Henson were greatly honored for their achievements. Today, the two friends and fellow explorers lie in heroes' graves not far apart in the Arlington National Cemetery.

    A new "paparazzi-proof" scarf has got heatedly welcomed since launched. A new "paparazzi-proof" scarf could be a game-changer for celebrities who prefer to shy away from the stage light. The ISHU scarf is the creation of Dutch-born fashion entrepreneur Saif Siddiqui and is designed to "give people their right to privacy back". A host of celebrities including Cameron Diaz, singer Joe Jonas, Bayern Munich footballer Jerome Boateng and music producer Major Lazer have worn the ISHU after it was spotted at London Fashion Week last year.

    It works by reflecting the light back into a camera, effectively becoming "invisibility clothes" for celebrities who don't want their photos taken. Anyone wearing the scarf is protected from mobile flash photograph, with the fashion accessory's fabric (附件结构) effectively blocking out any unwanted pictures, although it doesn't stop no-flash photographs from being taken.

    The 28-year-old Siddiqui was inspired while visiting family in Amsterdam in 2009 when his friends attempted to take a photo of him using an iPhone in front of some bikes. "He noticed that the bike's reflector carried the flash of his mobile camera in a way that confused the faces of his friends in the picture." the ISHU website explains. "He immediately realized that if developed into the right product, this feature would be an ideal solution for his friends and is now available to the public who want to keep their private moments in public private. "Saif put together a team of experts who dug into the science of light and reflection, and how to blend technology with fashion."

    He told Decoded Magazine: "The ISHU scarf effectively allows an individual to control what pictures and videos are taken of him. "There are no more unwanted pictures and videos on Snapchat, Instagram, or Facebook! Everyone carries a phone with them nowadays that has an amazing camera. So, it all made sense to me." More ISHU products are set to launch in August, with mobile phone cases set to launch in the next few weeks. The ISHU is currently sold out but you can pre-order it online for ￡289.

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