Reducing the amount of sleep affects students' performance at school. An American study asked schoolteachers to look at the effects of sleep restriction（限制） on children between six and twelve years of age. The teachers found that children who stayed up late had trouble thinking clearly and had more learning problems.

    {#blank#}1{#/blank#} Doctor Fallone now works at the Forest Institute of Professional Psychology in Springfield, Missouri. He presented the results last month at a science reporter conference in Washington, D. C. The Publication Sleep also reported the findings.

    The teachers were asked to complete weekly performance reports on seventy-four schoolchildren. The study lasted three weeks. During that period, Doctor Fallone and his team controlled the amount of sleep the children received.

    {#blank#}2{#/blank#} During another week, every child was kept awake later than normal. Each night, the youngest boys and girls had less than eight hours of sleep. The older ones were limited to six and a half hours. During the final week of the study, each child received no less than ten hours of sleep a night.

    The teachers were not told about how much sleep the students received. The study found that students who received eight hours or less had the most difficulty remembering old information. {#blank#}3{#/blank#}

    The study did not find that sleep restriction caused hyperactivity(极度活跃) in the children. {#blank#}4{#/blank#}

    Doctor Fall one said that the results provided experts and parents with a clear message: {#blank#}5{#/blank#}

    Experience around food is about the place. The time and the people, and “the best meal” can be found in a fine dining restaurant or in a crowded street market. How can you recreate that special moment influenced by place and time? Travel is becoming the most popular reason to visit many places around the world. Here are the places that consistently excite the senses.

    South of France

    Markets with fresh fruits and vegetables and butcher shops are abundant. Regional(地区的)wines are excellent. And freshly baked French bread with French butter is what memories are made of. Take a chair in an ancient walled city for a meal with a view that you will never forget.

    Barcelona

    This bustling city filled with unique buildings is a city for lovers of history, architecture, and food. Kiosko Universal, a counter restaurant at one comer of the market, prepares some of the simplest and best food we've ever had. Give yourself a week to explore and see everything the city offers. The city is not to be missed.

    Italy

    It's hard to choose one place or city to visit. Some of our favorite places include the coastal regions on the Adriatic and Tuscany. Friuli stole our hearts last year with its many unique wines, small artisan food producers, and influences fro neighboring countries like Austria and Germany.

    Mexico City

    From unbelievable food markets and casual street stands, Mexico City has become the place to travel for the food lovers. If you want to eat locally, order a Hurache, a street food specialty. All you will need is a local microbrew or Mezcal(龙舌兰酒)to wash it down.

    Travis is the manager of G&G where he is responsible for forty employees (雇员)and profits (利润) of over $2 million per year. He's never late to work. He does not get upset on the job. When one of his employees started crying after a customer screamed at her, Travis took her away. "Your working uniform is your shelter," he told her. "Nothing anyone says will ever hurt you. You will always be as strong as you want to be."

    Travis picked up that lecture in one of his G&G training courses, an education program that began on his first day and continues throughout an employee's occupation. The training has, Travis says, changed his life. G&G has taught him how to live, how to focus, how to get to work on time, and how to master his emotions (情绪). Most importantly, it taught him willpower.

    At the center of that education is an extreme focus on an all-important habit; willpower. Dozens of cases show that willpower is the single most important habit for a person's success.

    And the best way to strengthen willpower is to make it into a habit. "Sometimes it looks like people with great self-control aren't working hard—but that's because they've made it automatic," Angela Duckworth, one of the University of Pennsylvania researchers said. "Their willpower occurs without them having to think about it."

    The company spent millions of dollars developing programs of study to train employees on self-control. Managers wrote workbooks that serve as guides to how to make willpower a habit in workers' lives. Those courses arc, in part, why G&G has grown from a sleepy company into a large one with more than seventeen thousand stores and profits of more than $10 billion a year.

    If a woman has an extra piece of cake, don't blame it on greed, blame it on her brain.

    Scientists have found that women's brains react to food very differently—and much more strongly—than men's. Academics found that decades of dieting pressure on women and advertising have programmed certain parts of the female brain to react strongly when faced with any kind of food. Men, on the other hand, are not usually as obsessive (着迷的) about what they eat.

    Dr. Rudolf Uher and his colleagues at the Institute of Psychiatry in King's College London used brain scanning technology, known as functional magnetic resonance imaging (FMRI), to look at the brains of eighteen men and women.

The volunteers were given images of food to look at, as well as food to taste. Their brain reactions were observed by the scientists.

    They found that the female brains reacted much more strongly than those of males.

    The same reaction did not happen when they were shown non-food images. The team believe this means women think more about food than men tend to do.

    Dr. Uher said, “This could be related to biological differences between men and women. But the more likely explanation is that women have a more complicated reaction to food because of social pressure.

    Professor Carey Cooper, psychology and health professor at Lancaster University, said, “For centuries women have had a providing role — preparing and cooking food for their families. And it is part of that rule to make sure the food is safe. They will therefore be much more sensitive to food than men are, and I would not be surprised if that was now built into their DNA. If the female brain reacts to food because it historically has developed neural (神经的) pathways to do this, then food will be the way they express their stress. Food actually, is a comfort for women.”

    But other experts have said that more research must be done before the results can be proved. American scientist Angelo del Parigi of the John B. Pierce Laboratory in New Haven, Connecticut, said, “Looking at an FMRI alone cannot make sure whether the stronger reaction in women is due to innate (天生的) differences or a learned process.

    No one likes to make mistakes. But a new study says organizations learn more from their failures than from their successes, and keep that knowledge longer.

    One of the researchers was Vinit Desai, an assistant professor at the University of Colorado Denver Business School. He worked with Peter Madsen from the Marriott School of Management at Brigham Young University in Utah.

    They did not find much long-term "organizational learning" from success. It is possible, they say. But Professor Desai says they found that knowledge gained from failure lasts for years. He says organizations should treat failures as a learning opportunity and not try to ignore them.

    The study looked at companies and organizations that launch satellites and other space vehicles. Professor Desai compared two shuttle flights. In two thousand two, a piece of insulating (隔热的) material broke off during launch and damaged a rocket on the Atlantis. Still the flight was considered a success. Then in early two thousand three, a piece of insulation struck the Columbia during launch. This time, the shuttle broke apart on re-entry and the seven crew members died. NASA officials suspended all flights and an investigation led to suggested changes.

    Professor Desai says the search for solutions after a failure can make leaders more open-minded. He points to air-lines as an example of an industry that has learned from failures in the past. He advises organizations to look for useful information in small failures and failures they avoided. He also urges leaders to encourage the open sharing of information. The study appeared in the Academy of management Journal.

    The mistakes we learn from do not have to be our own. We recently asked people on our Facebook page to tell us a time they had done something really silly. Fabricio Cmino wrote: Not long ago I wanted to watch TV, but it wouldn't turn on, so I did everything I could to start it. Thirty minutes later my mum showed up and, passing by, said to me "Did you try plugging it?" "I'm just dusting, Mum!" So she wouldn't notice how dumb I am sometimes!

    Bruno Kanieski da Silva told about a time he looked everywhere for his key. It was in his pocket. He wrote: I always promise I will never do it again, but after a few weeks, where is my wallet? For sure it will be in a very logical place.

Brilliant Ways to Deliver Secret Messages

Many effective ways are used now to deliver secret messages. But in the past when the science and technology was not developing, especially during the war, how did people send secret and important messages?

Shoelaces

In the 1950s, the U.S. Central Intelligence Agency created a book of tips to teach spies ways to communicate in public. One tip: Lace up your shoes. Tied one way, the laces might mean "I have information": tied another, "Follow me". The spies could communicate while everyone else probably thought, "That guy can't tie his shoes correctly!"

Tattooed (刺文身) Head

Around 513 B.C., Histiaeus was forced out as the ruler of an ancient city. So he wanted to send a message to his supporters: Rebel against the king who took away his power.

Histiaeus called in a slave, shaved his head and tattooed the message onto the man's skin on the top of head. After the slave's hair grew back, he travelled to Greece with orders to shave his head again. Message received!

Orange Juice

In 1597, John Gerard was imprisoned in the Tower of London in England. He asked the prison guard to let him send letters written in charcoal (木炭). But then he wrote another message on top using the juice from an orange-which was only visible when the juice was dry and the page heated. With his invisible ink, he escaped successfully.

Songs

In the 1800s, African American slaves couldn't talk openly about their plans to escape to freedom—so they secretly sang about it.

Swing Low, Sweet Chariot might sound like a religious song. But for slaves, the "sweet chariot" was the code for the Underground Railroad, the network of people who helped slaves head to northern states and Canada. The song Wade in the Water warned escaped slaves to get in the water so dogs wouldn't smell them. With these songs, hundreds of people escaped slavery.