Most young architects—particularly those in big cities—can only dream about working in a building of their own. And making that dream come true often means finding a building no one else seems to want, which is exactly what happened to David Yocum and his partner, Brian Bell. Their building is a former automobile electrical-parts firm in Atlanta. From the outside, it looks too old, even something horrible, but open the door and you are in a wide, open courtyard, lined on three sides with rusting walls.

    In 2000,Yocum and Bell found this building in the city's West End. Built in 1947, the structure had been abandoned years earlier and the roof of the main building had fallen down. But the price was right, so Yocum bought it. He spent eight months of his off-hours on demolition, pulling rubbish out through the roof, because it was too dangerous to go inside the building. The demolition was hard work, but it gave him time to think about what he wanted to do, and “to treasure what was there—the walls, the rust, the light,” Yocum said. “Every season, more paint falls off the walls and more rust develops. It's like an art installation(装置) in there—a slow-motion show.”

    Since the back building had been constructed without windows, an all-glass front was added to the building to give it a view of the courtyard, and skylights were installed in the roof. The back of the building is a working area and a living room for Yocum and his wife. A sort of buffer(缓冲) zone between the front and the back contains a bathroom, a kitchen and a mechanical room, and the walls that separate these zones have openings that allow views through to the front of the studio and the courtyard beyond.

    Yocum and Bell, who have just completed an art gallery for the city, feel that the experience from the decoration of their building, focusing on the inside rather than the outside, has influenced their work. It has also given these architects a chance to show how they can make more out of less.

    It's best to plan ahead and there is no better way than to prepare for an emergency before it happens. For example, the time to plan for a fire emergency is before it happens. This is when everyone is calm and clear-thinking. This is when decisions about safe escape routes can be discussed and made. Have a family talk. Don't delay. Planning won't help after a fire starts.

    Knowing ahead of time how to get out during a fire can save needed seconds. The best way out in a fire is the route you use to go in and out every day. Yet, in a fire this route may be blocked. Be sure to plan other escape routes.

    Take each person to his or her room and describe what to do in case of fire. Give everyone a job. Older children should take care of younger ones. Plans may have to be made for anyone who cannot escape without help. Adults who can't walk should sleep on the first floor. Small children should sleep near older persons who can help them. Only healthy, able persons should sleep in hard-to-reach places such as attics or basements.

    Practice your escape plan at night when it is dark. Be sure that your plan is good and will work. For example, make sure that a child can actually open the window he is supposed to use for his escape. Teach children to close their bedroom doors. Tell them to wait by an open window until someone can reach them from outside. If an adult cannot be wakened, children should understand that they must leave by themselves.

    Choose a meeting place outside. This way you can tell if everyone is safely out of the building. Know where nearby telephones or fire alarm boxes are found.

    If you live in an apartment, try to get everyone out. Learn where the fire alarm is in the building. Your family should know what the fire alarm bell sounds like. They should know what to do when they hear it. Try to get the other families in your building together to have fire drills. Write down the telephone number of the fire department. Stick the number to each phone.

    Early warning is the key to a safe escape. It has been shown time and time again that a family can escape if warned early enough.

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    Some kinds of mental skills naturally decrease as people get older. Yet research seems to show that some training can improve such skills. A recently published study also appears to attest that the good effects of training can last for many years after that training has ended.

    Researchers at Johns Hopkins University in Maryland wanted to learn how long memory and thinking skills would last in older people who were trained to keep them. The people were part of the ten-year research project. They were taught methods meant to improve their memory, thinking and ability to perform everyday tasks.

    More than 2,800 volunteered for the study called ACTIVE ­ short for Advanced Cognitive Training for Independent and Vital Elderly. Most were studied when they were more than 70 years old.

    The volunteers took one of several short training classes meant to help them keep their mental abilities. One class trained participants in skills including how to remember word lists. Another group trained in reasoning. A third group received help with speed-of-processing ­ speed of receiving and understanding information. A fourth group ­ the control group did not get any training.

    Earlier results had established that the training helped the participants for up to five years. Now, leading study writer George Rebok says, the research showed most of the training remained effective a full ten years later.

    Professor Rebok and his team found that the people trained in reasoning and speed-of- processing did better on tests than the control group.

    "We are wondering whether those effects which endured over time would still be there ten years following the training, and in fact, that's exactly what we found.

    The effect on memory, however, seemed not to last as long. Still, the old people in any of the three classes generally reported less difficulty in performing daily activities than the control group. The total training time for the older people was between 10 and 15 hours.

Biofuels (生物燃料), gained from plants and animal matter, are a key solution to the environmental problems caused by fuels like coal. "Bioalcohol (生物酒精) is the most common biofuel and is produced by sugars found in materials such as corn. With some engine redesigned, it can be used directly by cars, buses, etc. ," says Professor Daniel Tan, "12 percent of transport fuel could come from biofuels, especially bioalcohol, by 2030. "

But a 2016 study of biofuels said, "Bioalcohol presently is mostly produced with food crops. Altogether, the environmentally-friendly biofuels rely on about 2-3 percent of the global water and land used for agriculture, which could feed a large number of hungry people. "

Energy experts have therefore been trying to deal with the problem. Recent research led by an international team found that the agave (龙舌兰) plant might offer a way out. This plant tends to be the right bioalcohol source to supersede others such as sugarcane (甘蔗) and corn.

Daniel Tan explains that the agave can be grown in unfavorable conditions and is not a major food crop. "It can grow in areas that lack water and rainfall without being watered by farmers, and it does not compete with food crops or put demands on limited water. This kind of useful plant is recently being grown in Australia. It can survive Australia's hot summers," he says.

The study finds that sugarcane produces just a little more fuel per square meter each year than the agave. However, the agave outperforms sugarcane in a range of areas, including pollution to the earth, and water using. The agave uses 69 percent less water than sugarcane and 46 percent less water than corn for the same amount of fuel produced. As for corn，it produces less fuel per square meter each year than the agave.

However, Daniel Tan states: "The first generation of bioalcohol from the agave recently faces a big competition from oil, whose recent low price makes it far more attractive to customers. Without some policy support from the government, bioalcohol production from the agave faces big challenges. "

The text from my son said it all: "Dad, there's an article you were born to write that the world is finally ready for: Bring Back the Handkerchief!" As my son knows, there's no "bring back" for me. For me, the handkerchief never left. 

My mother raised me with several fixed rules. One was that a gentleman always has a clean handkerchief in his right rear pocket, a piece of simple cotton, roughly 15 inches square and less than four inches when folded. I was a dutiful son, but as a child, I had been wondering what it was there for. After 60 years, my body weight now feels wrong if I'm heading out of the house with an empty back pocket. 

I am sure this habit has sometimes struck friends but in polite company nobody comments on somebody else's business. Children like my kids think of my hankie ridiculously old-fashioned and they have their arguments. If you have to be prepared every day for allergies or a cold, why not choose a little packet of tissues, which saves you from that disgusting business of blowing your nose in the thing and then stuffing it back in your pants?

Point taken. But a handkerchief is more durable and has a far wider variety of uses. Can you grab the handle of a pot that's boiling over with a Kleenex? Or do you recall the cases of skinned knees and drippy noses that hankie wiped? In fact, my wife gave me several new handkerchiefs as gifts. Neither of us can count the number of times her eyes have welled up at a movie, or, as happens, she's needed to blow her nose. 

Yet not even my mother could have anticipated the hankie's new role as an Essential Public Health Appliance. All of us have learnt how hard it is to follow advice from medical experts about not touching your face. Here is an answer. Use your hankie. In case of emergency, your handkerchief can become a makeshift DIY mask that can be pulled over your lower face like a robber entering a bank. 

And it will certainly give me the chance to lift my chin and look at my adult children through one eye, asking in her good-hearted way, "What do you have to say now, smarty-pants?"