Want to add some hours to your day? Ok,you probably can't change the fabric of time. But a new study suggests that theway you feel about your goal can change your concept of time and that somesimple strategies could make you feel less rushed.

In a series of experiments, JordanEtkin, a professor of marketing at Duke, and her co-authors, LoannisEvangelidis and Jennifer Aaker, looked at what happens when people see theirgoals as conflicting with one another. In one, they asked some participants tolist two of their goals that they felt were in conflict, and others simply tolist two of their goals. Those who were forced to think about conflicting aimsfelt more time pressure than those who weren't. In another experiment, the researchersgave participants a similar prompt regarding goal conflict, but this timemeasured their anxiety levels as well as their attitudes toward time. Theyfound that participants who thought about conflicting goals had more anxietythan those who didn't, and that this, in turn, led to feelings of being shorton time.

"Stress and anxiety and timepressure are closely linked concepts," D. Etkin explained. "When wefeel more stress and anxiety in relation to our personal goals, that manifestsas a sense of having less time."

Technological advances that allow peopleto do lots of things at once may increase the fe'eling of goal conflict, shesaid."I think the easier it is for us to try to deal with a lot of thesethings at the same time," She said"the more opportunity there is for us to feel this conflictbetween our goals."She isn't the first to suggest that actual busynessisn't the only thing that can make us feel busy At the Atlantic, Derek Thompson wrote that "as a country, we'reworking less than we did in the 1960s and 1980s." He offered a number ofpossible reasons some Americans still feel so overworked, including "thefluidness ffl±) of work and leisure." As he put it:"The idea thatwork begins and ends at the office is wrong. On the one hand, flexibility isnice, On the other, mixing work and leisure together creates an always-onexpectation that makes it hard for white-collar workers to escape the shadow ofwork responsibilities."

And Brigid Schulte writes in her 2014book Overwhelmed: How to Work, Love, and Play When No One Has the Time thatsome researchers believe "time has no sharp edges. What often matters morethan the activity we're doing at a moment in time, they have found, is how wefeel about it.Our concept of time is indeed,our reality.”

Fortunately, Dr. Etkin and her team didfind ways of making us feel better about time—or, at least, of reducing thenegative influence of goal conflict. When participants performed a breathingexercise that reduced their anxiety, the impact of such conflict on theirperception of time was less pronounced. Reframing anxiety as excitement (byreading the phrase "I am excited!" aloud several times) had a similareffect.

Breathing and reframing may not solveeveryone's time problems—Ms. Schulte writes that some Americans are indeedworking more than they used to. She cites the work of the sociologists MichaelHout and Caroline Hanley, who have "found that working parents combinedput in 13 more hours a week on the job in 2000 than they did in 1970. That's676 hours of additionally paid work a year for a family. And that's on top ofall the unpaid hours spent caring for children and keeping the housetogether." Sometimes, we may feel short on time because we actually are.However, Dr. Etkin believes her findings suggest we may "have the abilityto influence our experience of time more than we think we do."

"We're all going to have times inour lives when our goals seem to be in more conflict than others," shesaid. But with techniques like the ones her team tested, "we really canhelp ourselves feel like we have more time."

    Will there be a time in our lives when cars don't crash? When we can just sit back and relax and our cars will drive themselves. Auto technology experts say “yes”. And they say that some of those advances may happen quicker than you might think.

    They will require the users to input the name of the destination or the complete address of the location that they want to go and the cars' artificial intelligence takes them there automatically without a driver. They will run on solar power in the daytime and ethanol fuel (乙醇燃料) at night. Toyota, BMW and Honda will completely control the trade of driverless car business together and will have the cheapest driverless cars. Fossil fuels will be completely incompatible (不相配的) with these cars.

    Driverless cars will not require a driver's license of any grade to operate. Anyone with basic literacy and computer skills who are at least 16 years of age will be legally allowed to operate the vehicle with absolutely no limits.This would give the young users permission to operate the driverless cars on major highways as well as secondary roads without needing a separate classification. In addition to all this, drunken people will be able to use their own automobiles to return home because they are not “driving”, the vehicle.

    What's more, car insurance will become obsolete(淘汰的) because there will be no more automobile accidents after the year 2025. This is because the driverless car will have all safety methods in place by the car's artificial intelligence to prevent automobile accidents. Global positioning systems will become mandatory (强制的) in all newly-produced cars after 2010, and will be the most important part in the driverless car.

    Try this: For an entire day, forget about the clock. Eat when you're hungry and sleep when you're tired. What do you think will happen?

    You may be surprised to find that your day is much like most other days. You'll probably get hungry when you normally eat and tired when you normally sleep. Even though you don't know what time it is, your body does. These patterns of daily life are called circadian rhythms(生理节奏), and they are more than just habits. Inside our bodies are several clocklike systems that follow a roughly 24-hour cycle. Throughout the day and night, our inner clocks direct changes in temperature, body chemicals, hunger, sleepiness and more.

    Everyone's rhythms are different, which is why you might like to stay up late while your sister always wants to go to bed early. But on the whole, everyone is programmed to feel tired at night and energetic during the day. Learning about our body clocks may help scientists understand why problems arise when we act out of step with our circadian rhythms. For example, traveling across time zones can make people wake up in the middle of the night. Regularly staying up late can make kids do worse in tests.

    "There is a growing sense that when we eat and when we sleep are important parts of how healthy we are," says Steven Shea, director of the Sleep Disorders Program at Brigham and Women's Hospital in Boston.

    One way to learn about how our body clocks tick is to mess them up and see what happens. That's what neurologist(神经病学家)Frank Scheer and his workmates did in a recent study. Staying up night after night, their studies suggest, could make kids extra hungry and more likely to gain weight. And regularly sleeping too little, Scheer says, may be one cause of the recent increase in childhood obesity.

    Like a tired marriage, the relationship between libraries and publishers has long been dull. E-books, however, are causing heartache. Libraries know they need digital wares, but many publishers are too cautious about piracy (盗版）and lost sales to co-operate. Among the big six, only Random House and Harper Collins license e-books with most libraries.

    Publishers are wise to be nervous. Owners of e-readers (电子阅读器）are exactly the customers they need: book-lovers with money. If these people switch to borrowing e-books instead of buying them, what then? Electronic borrowing is awfully convenient. Unlike printed books, which must be checked out and returned to a physical library miles from where you live, book files can be downloaded at home. The files disappear from the device when they are due.

    E-lending is not simple, however. There are lots of different and often incompatible (不兼容的)e-book formats, devices and licenses. Most libraries use a company called OverDrive，which secures rights from publishers and provides e-books and audio files in every format. Yet publishers and libraries are worried by OverDrive's global market dominance, as the company can control fees and conditions. Publishers were annoyed when OverDrive cooperated with Amazon, the world's biggest online bookseller，last year. Owners of Amazon's Kindle e-reader who want to borrow e-books from libraries are now redirected to Amazon's website, where they must use their Amazon account to secure a loan.

    According to Pew, an opinion researcher, library users are a perfect for market for Amazon. Late last year Amazon introduced its Kindle Owners' Lending Library, which lets its best customers borrow free one of thousands of popular books each month.

    Library supporters argue that book borrowers arc also book buyers and that libraries are vital spaces for readers to discover new work. Many were cheered by a recent Pew survey, which found that more than half of Americans with library cards say they prefer to buy their e-books.

    So publishers keep adjusting their lending arrangements in search of the right balance.

    Random House raised its licensing prices earlier this year, and Harper Collins limits libraries to lending its titles 26 times.

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    The negative (负面的) health effects of sleep shortages during the week can't be changed by marathon weekend sleep sessions, according to a new study.

    Researchers have long known that routine sleep deprivation (缺乏) can cause weight gain and increase other health risks, including diabetes. But there are still some people who hope that shutting off the alarm on Saturday and Sunday will repay the weekly sleep debt and remove any ill effects.

    The research, published in Current Biology, ruins those hopes. Despite complete freedom to sleep in and nap during a weekend recovery period, participants in a sleep laboratory who were limited to five hours of sleep on weekdays gained nearly three pounds over two weeks and experienced metabolic disruption (代谢紊乱) that would increase their risk for diabetes over the long term. While weekend recovery sleep had some benefits after a single week of inadequate sleep, those gains were wiped out when people returned right to their same sleep schedule the next Monday.

    "If there are benefits of catch-up sleep, they're gone when you go back to your routine. It's very short-lived," said Kenneth Wright, who led the research. "These health effects are long-term. It's kind of like smoking once was — people would smoke and wouldn't see an immediate effect on their health, but people will say now that smoking is not a healthy lifestyle choice. I think sleep is in the early stage of where smoking used to be."

    Wright said that the study suggests people should prioritize sleep — cutting out the optional "sleep stealers" such as watching television shows or spending time on electronic equipment. Even when people don't have a choice about losing sleep due to child-care responsibilities or job schedules, they should think about prioritizing sleep in the same way they would think about a healthy diet or exercise.