When it's five o'clock, people leave their office. The length of the workday,for many workers,is defined by time. They leave when the clock tells them they're done.

    These days, the time is everywhere: not just on clocks or watches,but on cell-phones and computers.That may be a bad thing,particularly at work.New research shows on that clock-based work schedules hinder morale and creativity.

    Clock-timers organize their day by blocks of minutes and hours.For example: a meeting from 9 a.m. to 10 a.m., research from 10 a.m.to noon,etc.On the other hand,task-timers have a list of things they want to accomplish.They work down the list,each task starts when the previous task is completed.It is said that all of us employ a mix of both these types of planning.

    What,then,are the effects of thinking about time in these different ways? Does one make us more productive? Better at the tasks at hand? Happier? In experiments conducted by Tamar Avnet and Anne-Laure Sellier,they had participints organize different activities-from project planning,holiday shopping,to yoga-by time or to-do list to measure how they performed under "clock time" vs "task time".They found clock timers to be more efficient but less happy because they felt little control over their lives.Task timers are happier and more creative,but less productive. They tend to enjoy the moment when something good is happening,and seize opportunities that come up.

    The researchers argue that task-based organizing tends to be undervalued and under-supported in the business culture.Smart companies,they believe,will try to bake more task-based planning into their strategies.

    This might be a small change to the way we view work and the office,but the researchers argue that it challenges a widespread characteristic of the economy: work organized by clock time.While most people will still probably need,and be,to some extent,clock-timers,task-based timing should be used when performing a job that requires more creativity.It'll make those tasks easier,and the task-doers will be happier.

    To understand how Americans think about things, it is necessary to understand "the point". Americans mention it often: "Let's get right to the point." They will say, "My point is…" "What's the point of all this?"

    The "point" is the idea or piece of information that Americans suppose is, or should be, at the center of people's thinking, writings, and spoken comments. Speakers and writers are supposed to "make their points clear", meaning that they are supposed to say or write clearly the idea or piece of information they wish to express.

    People from many other cultures have different ideas about the point. Africans traditionally tell stories that express the thoughts they have in mind, rather than stating the point clearly. Japanese traditionally speak indirectly, leaving the listener to figure out what the point is. Thus, while an American might say to a friend, "I don't think that coat goes very well with the rest of your outfit," a Japanese might say, "Maybe another coat would look even better than the one you have on." Americans value a person who "gets right to the point". Japanese are likely to consider such a person insensitive if not rude.

    The Chinese and Japanese languages are characterized by vagueness and ambiguity. The precision and directness Americans associate with "the point" cannot be achieved, at least not with any grace, in Chinese and Japanese. Speakers of those languages thus have to learn a new way of reasoning and expressing their ideas if they are going to communicate satisfactorily with Americans.

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    While all cultures share the same basic emotions, the body language used throughout different countries of the world varies（变化）greatly. What can mean one thing in one country can often mean something completely different in another.

    For example, in North America and Europe people tend to prefer direct eye contact（接触）. But in some Asian countries longer eye contact is considered rude.

    So when communicating with people, always be aware of different cultural customs that may exist.

    A V sign in the US could mean victory, but in England, it stands for a rude challenge, which has the same meaning as showing the middle finger in the US.

The OK gesture（手势）in America and England is given to mean everything is good or well. But in Latin America is looked on as a rude sign.

    The thumbs（拇指）up sign in America and most of Europe means that something is good or well done, but it is considered rude in many Asian countries.

    Putting your feet on the table is generally not thought to be rude in America and England. However, in Thailand（泰国）it is really rude.

    Telling someone to come to you by curling your index finger（食指）is acceptable in America and England, but this gesture signifies death in Singapore.

    Raising your hand up means stop in America and England. In some Asian countries this gesture is used when asking for permission to speak.

    In most westernized countries it is considered normal for two men to shake hands. In some Asian countries it is quite normal for men to kiss each other, while in most westernized countries men kissing in public would be viewed as homosexual（同性恋）behavior.

    If you would like more information on different cultural gestures all over the world, see this site on non-verbal （口头的）communication.

    Antarctica, with its seemingly endless icy beauty, is one place where one look is worth a thousand words. My own dream to see it came true last January when I joined the sixth exploration crew(考查队) of the China National Marine Bureau. We spent 10 days connecting flights to reach our goal, but finally arrived at the Great Wall Station on Antarctica on the eve of Chinese New Year.

    There are only two seasons in Antarctica: winter and summer. You get polar nights in winter and polar days in summer. Day is longer than night in summer, and the temperature often reaches below zero. Luckily, there are no snowstorms in summer, which makes it the best season to travel. What I imagined before starting for Antarctica was a world of ice, storms, endless cold and loneliness. When I stopped on Antarctica for the first time, however, I saw rich, energetic and beautiful scenery that was beyond anything I had imagined.

    We only spent 11 days at the South Pole, but every minute was spent taking pictures and losing our heart to the wonderland. Beauty enveloped us as we watched the world around us. The mountains, oceans, ice, snow, sky, earth and people all seemed to have their own stories.

    Rocks from Antarctica are considered valuable. Unfortunately, I didn't bring one back. However, my heavy bags full of films are certainly worth that. It is in these pictures that the true Antarctica comes alive.

    As my dad unwrapped（打开）the new bicycle helmet（头盔）that I got him for his birthday, I realized that a number of people ride their bicycles every day without the protection of a helmet.

      Due to cold winters across the country, riding has become increasingly dangerous as many roads have holes and are torn-up（磨损的）. Not everyone realizes that there are laws requiring the wearing of helmets in many places.

    Where I live, there has been a law in place since October 1, 1992 stating that cyclists of all ages are required to wear helmets. Unfortunately, accidents can happen to the best of riders. My dad has been a cyclist for many years, and he often rides around my county and to Rockland Lake State Park.

    One afternoon, as he was just entering the park, he lost control of his bicycle and flew off and landed on a nearby patch of grass, breaking his helmet into pieces and losing consciousness（知觉）. When he was just awakening, a lovely couple found him and brought him back to our house, where he attempted to recall the events leading up to his fall. Later that day, a CAT scan showed that he had a concussion (脑震荡). That evening, while my dad was showing me the pieces of his broken helmet, we both came to a shocking realization.

    If he had not worn his helmet, he probably would have cracked his skull and perhaps died. Today, when my dad and I go out cycling, the wearing of our helmets is not even a question. Regardless of age, everyone should wear a helmet whenever they get on a bicycle.

Nick Torrance, a junior in high school, suffers from muscular dystrophy, and attends school in a specialized wheelchair. The muscle disease prevents him from accomplishing many everyday tasks, such as carrying his books and putting things away in his locker. So he had a fellow student assigned to help him. But Amy Smith, the school's occupational therapist, thought that being able to do something simple like opening his locker on his own would be empowering.

Amy initially thought they would be able to buy a device to help. But searching online turned up nothing that could meet their needs—everything needed a keycode or some other physical action, things her disabled student couldn't do. After the outside search for a method came up short, she looked within the school itself for an answer. Amy turned to the school's robotics instructor.

The instructor, in turn, suggested that two of his most capable students take on the project: Micah Stuhldreher and Wyatt Smrcka. They took first place in a national robotics competition, so they were a natural choice to tackle the locker door problem with a robotics solution. Micah and Wyatt wasted no time getting down to work and for an hour each school day, the boys brainstormed, built, and rebuilt various versions of the device until they landed on the perfect solution one year later.

Like in any device development, it took a lot of trial and error for Micah and Wyatt to make something that would work for their target audience. For example, they initially built a locker-opening button, but Nick wasn't strong enough to push it, so they replaced it with a sensor.

Now, between classes Nick steers his electric wheelchair to his locker and waves his hand over a sensor on the arm of the wheelchair. A few seconds later, the locker door swings open. Another wave closes the door. Nick can make it with ease—it may be a small thing, but it gives him a sense of independence.