Most people will answer a ringing phone. Usually you don't know who is phoning or how urgent their business is, so a ringing phone is difficult to ignore. In one experiment, a researcher wrote down the numbers of several public phones in stations and airports. Then he called the numbers. Someone nearly always answered. When he asked why, people usually said, “Because it rang.”

A few years ago in New Jersey, a man with a rifle killed 13 people. Armed police surrounded his house but he refused to come out. A reporter found out the phone number of the house and called. The man put down his rifle and answered the phone. “What do you want?” he said, “I'm really busy right now.”

    Imagine you're at work and the phone is ringing in someone else's office. Do you answer it or not? In one survey on telephone use, 51% of participants told researches that they did. We can't ignore the phone and for the reason, it forces its way into our lives. It interrupts what we are doing and on top of that, the caller is often someone we don't really want to talk to. However, in the survey, 58% said they never took the phone off the hook, and 67% didn't mind if someone called during a television programme. For 44% it wasn't a problem if someone rang during a meal, while only 28% were annoyed or upset. If someone phoned in the middle of the night, 40% told researchers that they got nervous or frightened, while around 30% got angry.

    Of course, when someone is really annoying, you can choose to hang up on him/her. This is in fact one of the rudest things you can do on the phone, but 79% said they were prepared to do it in some cases. Only 6% told researchers they never hung up on people.

    A Chinese consortium（联盟）led by China Railway Corp will participate in bidding for a high-speed railroad linking Singapore and Malaysia in 2018, marking another step in China's ambitious strategy to export its high-speed railway technologies to Southeast Asia.

    The consortium, consisting of eight companies including CRRC, China Railway Construction Corporation Ltd, China Railway Signal and Communication Co and Export-Import Bank of China, covers the design, construction, telecommunication, financing, operating and maintenance（维护）sectors for the high-speed rail network.

    A joint tender（招标）for the Kuala Lumpur-Singapore high-speed rail project was issued by the Malaysian and Singaporean government-owned utilities（公用事业）—MyHSR Corp and SG HSR，on Dec 20.According to a joint statement released by the two companies, the potential bidder would be responsible for the design, construction, financing, operating and maintenance of rolling stock and railway systems for the double-track line with a designed speed of 350 kilometers per hour.

    The tender is open to all companies, regardless of their location. A tender briefing will be held in Kuala Lumpur on Jan 23, and proposals need to be submitted by June 29. Submissions will be evaluated based on technical merit（优点）, commercial robustness, financial sustainability and price. The preferred bidder will be selected by the end of next year. The governments of both countries signed a bilateral（双边的）agreement late in 2016 to begin the project. According to the agreement, the high-speed rail link is expected to become operational by Dec 31, 2026, and will cut travel time between Kuala Lumpur and Singapore to just 90 minutes.

    “The move indicates that China's State-owned enterprises have stopped cruel competition to hurt each other,” said Du Chunbu, a professor of rail transportation at Beijing Jiaotong University. “Instead, they have started to form a consortium to better compete with companies from Japan, South Korea, Germany and Canada by bringing their specialties into play.”

    Grown-ups are often surprised by how well they remember something they learned as children but have never practiced ever since. A man who has not had a chance to go swimming for years can still swim as well as ever when he gets back in the water. He can get on a bicycle after many years and still ride away. He can play catch and hit a ball as well as his son. A mother who has not thought about the words for remember the story of Cinderella or Goldilocks and the Three Bears.

    One explanation is the law of overlearning, which can be stated as follows: Once we have learned something, additional learning trials increase the length of time we will remember it.

    In childhood we usually continue to practice such skills as swimming, bicycle riding, and playing baseball long after we have learned them. We continue to listen to and remind ourselves of words such as "Twinkle, twinkle, little star" and childhood tales such as Cinderella and Goldilocks. We not only learn but overlearn.

    The multiplication tables(乘法口诀表)are an exception to the general rule that we forget rather quickly the things that we learn in school, because they are another of the things we overlearn in childhood.

    The law of overlearning explains why cramming (突击学习)for an examination, though it may result in a passing grade, is not a satisfactory way to learn a college course. By cramming, a student may learn the subject well enough to get by on the examination, but he is likely soon to forget almost everything he learned. A little overlearning, on the other hand, is really necessary for one's future development.

    Mobile technology has created new ways for all types of learning styles to help discover new information. If you want to teach yourself things, here are some apps that will help you.

    Coursera

    Perhaps one of the biggest advancements in the history of e﹣learning, Coursera has teamed up with top school like Duke, Stanford, and John Hopkins to bring you direct access to real college courses in psychology, computer science, business, and technology. Each course features pre﹣recorded videos, projects, and quizzes, just like you'd receive inside the classroom.

    Lumosity

    This app features three﹣day sessions that target many different areas of brain activity：memory, speed, problem solving, and thinking flexibility. Each day you can participate in a timed session to sharpen mental intelligence and keep track of your progress over time.

    Duolingo

    If you've ever wanted to learn a new language but didn't know where to start or couldn't afford expensive apps, you need to check out Duolingo. This app teaches more than a dozen languages by breaking up exercises into mini games. The developer of Duolingo claims that 34 hours of learning in this app equals a full term's worth of school.

    EarthViewer

    Ever wonder what Earth looked like a million years ago？There's no better way to know than to look for yourself. Earth Viewer takes you on a digital journey to see how the landscape（地貌） and face of the planet has developed over the past 4.5 billion years, and view climate changes, sea level adjustments, or the evolution of famous cities.

    Actor Warwick Davis realized he was shorter than other people when he was eight years old.  He suddenly noticed all his schoolmates were twice his size. It was then that the effect of having dwarfism hit him for the first time.

    Now aged 48, Davis says, "I have very fond memories of school but I realized I had to become a little bit louder and funnier so I wouldn't get left out of conversations. I became quite the performer, so being short was my training in acting."

    It worked. Director George Lucas cast young Warwick as the Ewok Wicket in Return of the Jedi. The actor has gone on to star in many TV shows and films, including playing Professor Flitwick in the Harry Potter films.

    Warwick's dwarfism means he is 1.07 meters tall, while the average UK adult male height is 1.78 meters. Most types of dwarfism are caused by a genetic disorder that stops some of the body's building blocks working properly.

    Davis has a positive attitude to being "different". He says, "If I had my life all over again, I would choose the same job and be the same height. I have enjoyed every minute. At school I played rugby and football and tried long jump and high jump. I wasn't very good at them but I always had a go. I defeated everyone at chin-ups (引体向上) because I had a low body weight combined with a strong upper body from climbing up to the top cupboards to reach the biscuit boxes at home."

    Warwick is supporting Jeans for Genes Day, a charity raising public concern for millions of children born with genetic disorders in the U.K. He says, "Even if you can only give a tiny amount of money, it will make such a difference to the children."

Pet and animal-related apps are creating cybersecurity risks to their owners, new research has shown. While being able to keep track of your cat and dog may be an attractive benefit to many pet owners as it can provide peace of mind, allowing a third party to track your movements may be much less attractive.

Computer scientists at Newcastle University and Royal Holloway, University of London have exposed multiple security and privacy issues by evaluating 40 popular Android apps for pets. The results show that several of these apps are putting their users at risk by exposing their login or location details.

Password vulnerability(漏洞) was one of the areas exposed by the team. They identified three applications that had the user's login details visible in plain text within non-secure HTTP traffic. This means that anyone is able to observe the internet traffic of someone using one of these apps and will be able to find out their login information. In addition to login information, two of the apps also showed user details, such as their location that may enable someone to gain access to their devices and risk a cyber-attack.

Another area of concern identified in the study was the use of trackers. All but four of the applications were found to feature some form of tracking software. A tracker gathers information on the person using the application, on how they use it, or on the smartphone being used.

Scott Harper is a PhD student at Newcastle University's School of Computing and the lead author of the study. He said, "Pet tech such as smart collars and GPS trackers for your cat or dog, is a rapidly growing industry and it brings with it new security, privacy, and safety risks to the pet owners. We would urge anyone using these apps to take the time to ensure they are using a unique password, check the settings and ensure that they consider how much data they are sharing or willing to share."