In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Article: Australian sleep researchers have developed a set of hi-tech "sunglasses", described as the world's first "time control" glasses, which can imitate sunlight patterns. The team, from Flinders University, in Adelaide, says the glasses send out a soft green glow that helps a traveller adapt to changing sleep patterns and time zones in "small steps". It targets a part of the brain that regulates the human body-clock, by sending signals to the rest of the body that help it slowly realise it is in a different area of the world. It has been suggested the device, called the "Re-Timer", is currently the only wearable body clock adjustment system commercially available. Scientists say the device, officially launched in South Australia, can help ridf the negative effects of long-timel travel and bring new relief to insomnia sufferers, shift workers and even teenagers. "The light from Re-Timer stimulates the part of the brain responsible for regulating the 24-hour body clock," said Prof Leon Lack, its chief inventor. Extensive research has shown that green light is one of the most effective wavelengths for influencing the body clock. The battery-powered device, which retail for PS162 in Britain, then sends signals that cause the production of hormones and daily cycles known as circadian rhythms . Those people who want to sleep peacefully, but wake earlier, should wear it for 50 minutes in the morning for three days. Those who want a lie- in, should wear it for the same time before bed to delay the body clock. The device, which is powered by an inbuilt rechargeable battery, can also be worn as sunglasses during daily tasks such as reading or using a computer. "The glasses have been designed to be user friendly and comfortable to wear so people can go about their normal activities wearing them at work or at home," he said, adding they had been designed based on 25 years of university research. It is estimated that up to 94 per cent of long-time travellers suffer from jet lag because the body becomes confused to travelling through different time zones. So the glasses are good news to them. It uses the outside world as indicators as to whether it should be awake or asleep including factors such as light, silence or noise. Airlines are said to be seeking a "silver bullet" for the tiredness and confusion that often follow a long-timel flight and are in discussions to buy the device.
Answer: motivating part of the brain
The "time control" glasses work by _ .

Article: As civilization proceeds in the direction of technology, it passes the point of supplying all the basic essentials of life--food, shelter, clothes and warmth. Then we are faced with a choice between using technology to provide and fulfill needs which have now been regarded as unnecessary or, on the other hand, using technology to reduce the number of hours of work which a man must do in order to earn a given standard of living. In other words, we either raise our standard of living above that necessary for comfort and happiness or we leave it at this level and work shorter hours. I shall take it for granted that mankind has, by that time, chosen the latter alternative. Men will be working shorter and shorter hours in their paid employment. It follows that the housewife will also expect to be able to have more leisure in her life without lowering her standard of living. It also follows that human domestic servants will have completely ceased to exist. Yet the great majority of the housewives will wish to be relieved completely from the routine operations of the home such as scrubbing the floors or the bath of the cooker, or washing the clothes or washing up, or dusting or sweeping, or making beds. By far the most logical step to relieve the housewife of routine is to provide a robot which can be trained to the requirements of a particular home and can be programmed to carry out half a dozen or more standard operations, when switched by the housewife.
Answer: it is not necessary to supply the basic essentials of life
As civilization develops in the direction of technology, _ .

Article: A quick look at an e-reader New, High-Contrast E-Ink Screen 50% better contrast than any other e-reader. The clearest text and sharpest images. Read in Bright Sunlight Unlike LCD screens, its screen reads like real paper, with no glare. Read as easily in bright sunlight as in your living room. Lighter Than a Paperback Weighing only 8.5 ounces and 1/3 of an inch thick, it is lighter than a paperback and thinner than a magazine. Holds 3,500 Books We doubled its storage so you can carry up to 3,500 books. Battery Life of Up to One Month A single charge lasts up to one month with wireless off. Keeping wireless always on, it can go for up to three weeks without recharging. Books in 60 Seconds With fast, free wireless delivery, you can start reading books in less than 60 seconds. No computer required. _ Over 670,000 books, including 107 of 111 New York Times Best Sellers, plus audiobooks, periodicals and blogs. For non-U.S. customers, content availability varies. Free, Out-of-Copyright Books Over 1.8 million free, out-of-copyright, pre-1923 books are available such as Pride and Prejudice. Low Book Prices Over 550,000 books are $9.99 or less, including 73 New York Times Best Sellers of the present time. Free Book Samples Download and read first chapters for free before you decide to buy.
Answer: keep wireless off
If you want to use the e-reader longer, you should _ .