You get on an almost-empty bus, but the next passenger decides to ignore all the empty seats to sit right next to you. While you are waiting in line at the supermarket, the next customer stands just behind you shouting into his phone.

    These are attacks of the personal space invaders(侵略者). Though preferences for personal space differ from culture to culture, we Britons do love our independence and personal space.

    As the British customs website Debrett has said, as a British person, somebody standing too close may make you “focus less on what somebody is saying than on how close they are to you”. Simple acts like putting an arm around someone you don't know that well may seem friendly in China, but they can make us very uncomfortable. The ediplomat.com website explains: “The British are not back slappers (拍打者) or touchers and generally do not show affection (喜欢) in public.”

    Being a British person around people from other countries can therefore be full of problems. People from many European countries such as France and Spain kiss each other on the cheek when they meet, yet to us this seems too friendly and “touchy-feely”.

    Simple matters like how close others stand can be problems to Britons who want to keep their own personal space. Giving advice on how to behave around a British person, Debrett's says that “if you can feel the warmth of their worried breath upon your face, then you're standing too close”.

    So, are British people unfriendly? No. The ediplomat.com website explains that we are not as “indifferent” as we may seem, but “very friendly and helpful to foreigners”. However, we do have different ideas about our own space to many people from other countries. Just let us know if you're going to come any closer than arm's length, and you'll be fine!

    Four years ago, Chris Nagele did what many other technology CEO have done before—he moved his team into an open concept office.

    His staff had been working from home, but he wanted everyone to be together. It quickly became clear, though, that Nagele had made a huge mistake. Everyone was distracted, productivity(生产率) suffered and the nine employees were unhappy, not to mention Nagele himself.

    In April 2015, about three years after moving into the open office, Nagele moved the company into a 10,000-square-foot office where everyone now has their own space — complete with closing doors.

    Numerous companies have accepted the open office. But we're 15% less productive, we have great trouble concentrating.

    Since moving, Nagele himself has heard from others in technology who say they long for the closed office lifestyle. It's unlikely that the open office concept will go away anytime soon, but some companies are following Nagele's example and making a return to private spaces.

    There's one big reason we'd all love a space with four walls and a door that shuts: focus. The truth is, we can't multitask(多任务化) and small distractions can cause us to lose focus for upwards of 20 minutes.

    What's more, certain open spaces can negatively impact our memory. We retain(保留) more information when we sit in one spot, says Sally Augustin, an environmental and design psychologist in La Grange Park, Illinois. It's not so obvious to us each day, but we offload(卸下) memories — often little details — into our surroundings, she says.

    Beside the cheaper cost, one main argument for the open workspace is that it increases teamwork. However, it's well documented(记载) that we rarely brainstorm brilliant ideas when we're just talk casually in a crowd.

    The guzheng is a traditional Chinese musical instrument. It belongs to the zither（齐特琴）family of string instruments. It is the parent of many musical instruments of some other countries.

    The guzheng should not be confused with the guqin, another ancient Chinese zither but without bridges. Now the guzheng is zither with movable bridges and usually 21 strings, although it can have from 15-25 strings. The guzheng's strings were formerly made of silk, though most players used metal strings by the 20^th century. Since the mid-20^th century most performers use steel strings. The guzheng has a large resonant cavity（共振腔）.

    The guzheng has existed since the Warring States Period and became especially popular during the Qin dynasty. The number of strings on the guzheng has always fluctuated. There were as few as 6 to as many as 23 strings during the Tang dynasty. The earliest record of the guzheng belonged to the historian Sima Qian. Until 1961, the common guzheng had 16 strings, although by the mid-20^th century 18-string guzheng were also in use. In 1961, Xu Zhenggao, together with Wang Xunzhi, introduced the first 21-string guzheng after two years of research and development. In 1960, they also invented the “S-shaped” left string rest, which was quickly adopted by all guzheng makers and is still used today. This curve allows for greater ease in tuning the strings and, combined with strings of different thickness, allows for greater resonance in both the deeper and the higher pitch（音调）ranges. The 21-string guzheng is the most commonly used one, but some traditional musicians still use the 16-string one.

    If Frida Kahlo（1907-1954） is today one of the best-known and most popular figures of 20th-century, Mexican art, it is undoubtedly because of her personality and the originality（独创性）of a body of works. Her work is, above all, the expression of a real life－a tragic and stormy life, one that challenged all conventions. The mere mention of her name excites enthusiasm and admiration, but her work is rarely exhibited, and has not been shown in France for fifteen years. The selection to go on show at the Musee de L'Orangerie includes major works by the artist, with masterpieces from the Museo Dolores Olmedo.

    The life and work of Frida Kahlo cannot be separated from those of her companion Diego Rivera（1886-1957）. Together they became figures of legend, and both have a place in the pantheon of 20th-century Mexican artists. Famous for his large wall paintings, Rivera's easel paintings, drawings and prints, which form a large part of his artistic production, are less well-known to the public in Europe. The exhibition aims to trace his artistic career from the early Cubist images, revealing his links with the Paris artists whose works are a key element in the Orangerie collections, to the paintings that established him as the founder of the 20th-century school of Mexican art. His travels throughout Europe influenced his vision and his skills without ever distancing him from his roots, thus confirming his place in history as the founder of the nationalist school.

    The exhibition devoted to the legendary couple Diego Rivera and Frida Kahlo presents their works together, as if to confirm the impossibility of their divorce that was in fact finalized（定下来）but reconsidered after just one year apart. It also gives us a better view of their respective artistic worlds, so different and yet so complementary（互补的）, through the deep-rooted attachment they shared to their country.

    I've worked part time since taking early retirement ten years ago. I was inspired by an older friend. We worked for the same company, and he retired two years before I was also considered “spare”, as some companies call it.

    Soon after I left work, we had lunch together. First, he assured me that there was life after work. Then he related his own experience. He didn't want to take another full-time job, so he turned his daughter's old bedroom into a home office. He arranged for some consulting work from our old company, and he picked up more projects from other contacts. Soon he was working 20 to 30 hours a week. He wasn't making as much money. His kids were grown-up, so he didn't need as much income. “As soon as I left that job,” he told me, “my back problems went away. I started to eat better and get more exercise, I make half as much money, but I feel twice as good, and I'm twice as happy.”

    I decided to follow a similar track. At the time, my younger child almost finished college, so my parental responsibilities were winding down. We sold our old house and moved into a townhouse. I went to work for myself. And the result? Today I, too, make less money. But we make ends meet. And I feel twice as good and twice as happy.

    Our experience isn't for everybody. But a lot of people have retired early and lived to tell the tale, which proves it possible. Jack, another friend, was a salesman for a communication firm. He had a long distance to work and did a lot of traveling. He decided to leave the corporate world, in part because he had health problems and he wanted to spend more time with his family. Later, he quit his job with flexible hours and was restored to his health. And now he has found a part-time job, and he, together with his family, is leading a more relaxing life.

    Over the next decade, technology will decimate more jobs in many professions.

    Some robots already cost less to operate than the salaries of the humans they replace, and they are getting cheaper. Boston Consulting Group predicts that, by 2025, the operating cost of a robot that does welding (焊接) will be less than $2 per hour, for example. That's more affordable than the $25 per hour that a human welder earns today in America.

    Uber and many other companies are working on developing cars and trucks that don't need a driver in the driver's seat. According to the American Trucking Associations, approximately 3 million truck drivers were employed in the United States in 2010, and 6. 8 million others were employed in other jobs relating to trucking activity. So roughly one of every 15 workers in the country is employed in the trucking business. We could be talking about millions of jobs disappearing in the early 2020s.

    And then there is the "Gig Economy (零工经济)" that has some businesses moving toward part-time, on-demand employment. Uber has already done this to taxi drivers, and other technology companies are doing it to a wide range of jobs. A study by Intuit predicted that, by 2020, 40% of American workers will be self-employed, and that full-time jobs will be harder to find. We are talking about 60 million people in this category. The problem is that not only do such part-time workers lack reliable full-time jobs and sick pay, but they can't enjoy health insurance and longer-term benefits.

    The measures to be taken are to raise trade barriers. But closing the doors to foreign trade won't bring jobs back. It will only slow the global economy and hurt American exports, shrinking the U. S. economy and accelerating job loss.