As we know, DNA testing is very useful for crime fighting. But now crime fighters could have a new tool at hand. Researchers have developed a cutting-edge (前沿的) technique to identify human hair. Their test is quicker than DNA analysis techniques currently used by the police.

    DNA testing is commonly used for identification because DNA is unique to each individual. However, environmental and chemical processes can degrade(降解) DNA, limiting its usefulness over time. Protein (蛋白质) in hair, on the other hand, is more stable than DNA but can also have variations (变异体) that may be unique to the individual.

     “Our analysis process can be used universally,” says Ms. Huang, “One of our samples even included dyed hair and the test was 100 per cent accurate. The test was able to distinguish East Asians, Caucasians and South Asians.”

    Dr. Beauchemin says she has got in touch with law enforcement agencies about using the new technology. She is also planning to collect more hair samples and continue her research with a goal of finding where exactly in the world hair sample is from, to look for more races and determine specific age.

     “We are in a very similar place with protein-based identification to where DNA testing was during the early days of development,” said chemist Brad Hart. “This method will be a game-changer, and while we've made a lot of progress toward improving it, there are steps to go before this new technique is able to reach its full potential.”

    Scottish pupils recently were part of a new scheme that allowed them to take their exams online. Those examinations provided a glimpse of the future in May when 120 candidates in 10 centers in Scotland sat in front of computers to take a multiple-choice online exam. Although candidates were using a computer mouse instead of a pen, in all other ways the exam was the same as normal.

    Exam rooms were set out to ensure that only the candidates and the teachers were able to see the individual screens. The online answers were sent directly to a safe area. According to the students at St Ninian's in East Renfrewshire who took an online French exam, it was definitely the most motivated they had ever felt when taking an exam.

    “I could go as fast as I wanted to, rather than as slow as everyone else wanted to,” said one. “It was better than looking back and forth between the questions,” said another. One pupil even described it as fun.

    Their head teacher, Dorothy Graham, was not so surprised, “They are so used to doing things on computers that it seems natural for them. The boys liked it because they didn't have to worry about how neat their work was.” The only things that worried her were power cuts and systems' crashing.

    It's thought that online exams could be the norm (常态) in about five years. However, last year there were warnings about computerizing exams in England and Wales. It's thought that it could be unfair to some students if they come from homes without access to a computer.

    While there are a few ways to make use of your old smartphone, one of the better ways is to convert into a dash cam (行车记录仪) that you can use on your bicycle. With the camera, you can record your rides, which is especially helpful if you are involved in a crash with another vehicle.

    To use your smartphone as a dash cam on your bike, you will need to make sure it is properly secured to your bike. To do this correctly, you must take two strips of heavy-duty Velcro (a kind of cloth used as fastening) along with two pipe Clamps (管夹) and a flat corner brace (角撑) to properly attach it. You will start by attaching the comer brace to your smartphone.

    Next, attach a Velcro strip to your phoned back. You will put the second strip on the end of the brace comer and cut any extra Velcro off and away from the brace. By using heavy-duty Velcro, you shouldn't have to worry about the camera brace must be attached to the bicycle directly.

    Take two pipe clamps so you can attach the part of the corner brace so the phone can be held up and used. The pipe    clamps must be positioned near the center of the handlebar, which will enable you to get a better picture when videotaping.

    To run a dash cam app on your old phone, you will just need to download a dash cam app onto the old phone. You will then just start the app at any time you head out on the road. There is always the chance of flaws, but you will be giving yourself a way to protect yourself in a friendly, eco-friendly manner that is much less expensive than purchasing a dash cam.

    The medical world is gradually realizing that the quality of the environment in hospitals may play an important role in helping patients to get better.

    As part of nationwide effort in Britain to bring art out of the museum and into public places, some of the country's best artists have been called in to change older hospitals and to soften the hard edges of modern buildings.

    Of the 2,500 national health service hospitals in Britain, almost 100 now have very valuable collections of present art in passages (走廊), waiting areas and treatment rooms.

    These recent movements first started by one artist, Peter Senior, who set up his studio at a Manchester hospital in northeastern England during the early 1970s. He felt the artist had lost his place in modern society, and that art should be enjoyed by a wider audience. A common hospital waiting room might have as many as 5,000 visitors each week. What a better place to hold regular exhibition of art! Senior held the first exhibition of his own paintings in the outpatients waiting area of the Manchester Royal Hospital in 1975. Believed to be Britain's first hospital artist, Senior was so much in demand that a team of six young art school graduates soon joined him.

    The effect is surprising. Now in the passages and waiting rooms, the visitor experiences a full view of fresh colors, playful images and restful courtyards.

    The quality of the environment may reduce the need for expensive drugs when a patient is recovering from illness. A study has shown that patients who had a view onto garden needed half the number of strong painkillers compared with patients who had no view at all or only a brick wall to look at.

    An 114 kilograms mother, Cacia Griggs, was ashamed into losing weight after crushing her daughter, four-year-old Isabelle's bed while reading her a bedtime story.

    Just one year later she has lost 50 kilograms, dropped to a size 10, and even was employed by her dream company.

    One night, having asked her 29-year-old husband to carry Isabelle up to bed because she couldn't fit through the stair gate, Cacia followed them upstairs and lay down on the edge of the bed with her daughter to read her a story.

    “I heard a loud snap(噼啪声),” she said. “I'd broken the entire side beam of her bed because I was overweight. I was upset.”

    On her first family holiday with Chris and Isabelle in Turkey last year, Cacia had a similar moment when she couldn't fit the plane seatbelt around her.

    Cacia began the Cambridge Weight Plan in June 2011, changing her high-calorie diet into soups, shakes and bars. In August this year, Cacia reached her goal weight and dropped from a size 24 to a size 10.

    “My weight began to drop off,” she said. “In no time at all I was wearing smaller clothes and was over the moon the first time I brought a size 16, I couldn't believe it fitted.”

    Cacia says the best thing about losing the weight is being able to lie with her daughter again on her bed instead of sitting on the floor next to her.

    TheChristianScienceMonitor is seeking editorial interns (实习生)with good journalism skills to write and edit in the Monitor's various columns and online platforms. Applicants must be self－starters(做事主动的人), and have great analytical skills, a basic understanding of world events, and an ability to write and edit with clarity and precision.

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