In 1905, as part of his Special Theory of Relativity, Albert Einstein published the point that a large amount of energy could be released from a small amount of matter. This was expressed by equation E = me 2(energy = mass times the speed of light squared). But bombs were not what Einstein had in mind when he published this equation.

    In 1929, he publicly declared that if a war broke out he would “refused to do war service, direct or indirect…” His position would change in 1933, as the result of Adolf Hitler's coming into power in Germany.

    Einstein's greatest role in the invention of the atomic bomb was signing a letter to President Franklin Roosevelt urging that the bomb be built because some physicists feared that Germany might be working on an atomic bomb. Among those concerned were physicists Leo Szilard and Eugene Wigner. But Szilard and Wigner had no influence with those in power. So in July 1939 they explained the problem to someone who did: Albert Einstein. After talking with Einstein, in August 1939 Szilard wrote a letter to President Roosevelt with Einstein's signature on it, which was delivered to Roosevelt in October 1939.

    Germany has invaded Poland the previous month; the time was ripe for action. That October research of a-bomb began but proceeded slowly because the invention of the atomic bomb seemed distant and unlikely. In April 1940 an Einstein letter, ghost-written by Szilard, pressed the researchers on the need for “greater speed”.

    As the realization of nuclear weapons grew near, Einstein looked beyond the current war to future problems that such weapons could bring. He wrote to his friend about his fear about the future use of the a-bomb.

    The atomic bombings of Japan occurred three months after Germany gave in.

In November 1954, five months before his death, Einstein summarized his feelings about his role in the creation of the atomic bomb: “I made one great mistake in my life… when I signed a letter to President Roosevelt recommending that atom bombs be made; but there was some justification—- the danger that the Germans would make them”.

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    Home Laundry Automatic Dryer Product

    Full Two Year Warranty（保修）

    Limited Five Year Warranty on Cabinet（机箱）

    Warranty Provides for：

    FIRST TWO YEARS Amana will repair or replace any faulty part free of charge.

    THIRD THRU FIFTH YEARS Amana will provide a free replacement part for any cabinet which proves faulty due to rust（生锈）.

    Warranty Limitations：

    Warranty begins at date of original purchase.

    Applies only to product used within the United States or in Canada if product is approved by Canadian Standards Association when shipped from factory.

    Products used on a commercial or rental basis not covered by this warranty.

    Service must be performed by an Amana servicer.

    Adjustments covered during first year only.

Warranty Does Not Cover It If：

    Product has damage due to product change，connection to an improper electrical supply> shipping and handling, accident, fire, floods, lightning or other conditions beyond the control of Amana.

    Product is improperly installed（安装）or applied.

    Owner's Responsibilities：

    Provide sales receipt.

    Normal care and repair.

    Having the product reasonably accessible for service.

    Pay for service calls related to product installation or usage instructions.

    Pay for extra service costs, over normal service charges, if servicer is requested to perform service outside servicer^ normal business hours.

    In no event shall Amana be responsible for consequential damages（间接损坏）.

    This warranty gives you specific legal rights, and you may have others which vary from state to state For example, some states do not allow the exclusion（排除）or limitation of consequential damages, so this exclusion may not apply to you.

    The European Union(EU) is an organization of European countries. The countries are independent and are governed in different ways. In the United Kingdom, for example, the head of state is a king or queen. In France, on the other hand, the head of state is a president. But each of them sends representatives to European Parliament, which has some control over what happens in each of the member countries.

    The idea of the EU began in the 1950s. The first members were France, Germany, Belgium, Luxembourg, the Netherlands and Italy. Little by little, the number increased during second half of the twentieth century. By the year 2000, there were 15 member countries. The new countries were Austria, Denmark, Finland, Greece, Ireland, Portugal, Spain, Sweden and the United Kingdom.

    In 2004, the EU increased to 25 members. The Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, the Slovak Republic and Slovenia, plus the Mediterranean islands of Cyprus and Malta all became members. The expanded EU has a population of more than half a billion people, twice as big as the population of the US.

    One of the problems with passwords (密码) is that users forget them. In an effort to remember them, people use simple things like their dog's names and their birth dates — anything that will give them a clue to remember what their passwords are. But for a hacker(黑客), this is the same as locking your door and leaving the key under the doormat(门口地垫).

    To create a safe password that is easy to remember, follow these simple steps:

    You should never use personal information as part of your password. It is very easy for someone to guess things like your last name and your pet's name.

    With the help of today's computing power, it doesn't take long to try every word in the dictionary and find your password, so you'd better not use real words for your password.

    You can make a password much safer by mixing different types of characters. Use some capital letters along with small letters, numbers and even special characters such as & and %.

    In order not to create a password using different character types that is hard to remember or using a word from the dictionary, you can use a "passphrase(代码)". Think of a sentence from a song or a poem that you like and create a password using the first letters from each word. For example, instead of just setting a password like "yr$1Hes", you can take a sentence such as "I like to read the about.com Internet network security website" and make it a password like "il2rta!nsw" by using the number "2" for the word "to" and using "!" in place of "Internet". You can use many characters types and create a safe password that is hard to guess, but much easier for you to remember.

    Women may have good reason to drink coffee as much as they like. According to recent research, women who drank three or more cups of coffee a day were 30 percent less likely to have memory decline at age 65 than whose who drank one cup or less daily. And the benefit increased with age. Women over age 80 who drank three or more cups of coffee a day were about 70 percent less likely to have memory decline than those who drank one cup or less, the researchers said.

    Caffeinated tea had the same effect in the women, the study found, although more was needed to get the same caffeine boost. "Count roughly two cups of tea for a cup of coffee," said study leader Karen Ritchie of INSERM, the French National Institute for Health and Medical Research.

    But the researchers didn't find a similarly protective effect in men, although other studies have found a benefit to males.

    How might caffeine help ward off cognitive decline? "It is a cognitive stimulant." said Ritchie. "It also helps to reduce levels of the protein called beta amyloid in the brain" she said, "whose accumulation is responsible for Alzheimer's disease but which also occurs in normal aging."

    Ritchie said she wasn't sure why men in the study didn't benefit from caffeine. "Our hypothesis is that either women metabolize caffeine differently than men, or there may be an interaction of the caffeine with the sex hormones," she said.

    The French study confirms previous research, said William Scott, professor of medicine at the University of Miami Miller School of Medicine, who has researched caffeine's beneficial effects against Parkinson's disease, also a neurodegenerative disorder.

    As for caffeine only protecting women, Scott noted that just 2,800 of the 7,000 study participants were men, and the results might have differed if more men were included.

    A study published in February in the European Journal of Clinical Nutrition looked at 676 healthy men and found that regular coffee drinkers had a lower rate of cognitive decline over a 10-year follow-up than those who didn't drink coffee. Those who drank three cups daily had the least signs of decline.

    Both Scott and Ritchie agreed that more study is needed. Ritchie's research will next look at the relationship between caffeine and Alzheimer's.

    Life for almost anyone is increasingly influenced by screens. Not only are screens themselves cheap to make, but they also make things cheaper. Any place that can fit a screen in can cut costs. And any activity that can happen on a screen becomes cheaper. The physical experience of learning, living and dying is becoming smooth glass. All of this has led to a curious new reality: Human contact is becoming a luxury good (奢侈品).

    "What we are seeing now is the luxury of human engagement," Milton Pedraza, the chief of the

    Luxury Institute, said. Expected spending on experiences such as enjoyable travel and dining is outpacing spending on goods, according to his company's research, and he sees it as a direct response to the rapid increase of screens.

    Screens exposure starts young. And children who spent more than two hours a day looking at screen got lower scores on thinking and language tests, according to early results of a landmark study supported by the National Institutes of Health. The study focuses on brain development of more than 11,000 children. Most disturbingly, the study is finding that the brains of children who spend much time on screens are different. For some kids, their cerebral cortex (大脑皮层) would become thinner before expected time. In adults, one study found an association between screen time and depression.

    There is also the reality that in our culture of increasing separation, in which so many of the traditional gathering places and social structures have disappeared, screens are filling a vital gap.

    For normal people, running away from the screen becomes impossible. It's not a luxury, and it's easy to get. It is normal for more people to need the network constantly. In addition, it has become an important part of social interaction.