Are you sick of going to bed late and waking up tired? Then grab your hiking boots and a tent. A new study suggests that camping in the great outdoors for a couple of days can reset your body clock and help you get more sleep.

    The body clock is an internal system that tells our bodies when it's time to go to sleep and when it's time to wake up. Scientists track this clock by measuring the amount of melatonin (褪黑激素) circulating in a person's blood at any given time.

    In a healthy sleeper, melatonin levels rise a few hours before bedtime, stay high through the night, and then settle back down when it's time to wake up.

    In our modern society, however, most of us stay up many hours past sunset and would probably sleep in many hours after sunrise if we could. And the trouble is, your melatonin levels may still be high when your alarm clock goes off in the morning, which leads to fatigue. It may also have other health consequences as well, such as diabetes (糖尿病), overweight and heart disease.

    Professor Kenneth Wright of the University of Colorado in the US wanted to see if our body clocks can be reset by a short stay in nature. His team recruited (招募) fourteen physically active volunteers in their 20s and 30s. Nine went on a weekend camping trip, while the other five stayed home. At the end of the weekend, the researchers reported that in just two days, the campers' body clocks had shifted so that their melatonin levels began to rise more than an hour earlier than they did before they left on the trip. By contrast, the body clocks of the group that stayed home shifted even later over the course of the weekend.

    “This tells us we can reset our clocks fast,” Wright said.

    Therefore, if you want to change your sleep patterns you could try to increase your exposure to natural light during the day and decrease the amount of artificial light you see at night. And if that doesn't work，there's always camping.

How Room Designs Affect Our Work and Feelings

    Architects have long had the feeling that the places we live in can affect our thoughts, feelings and behaviors. But now scientists are giving this feeling an empirical（经验的，实证的） basis. They are discovering how to design spaces that promote creativity, keep people focused and lead to relaxation.

    Researches show that aspects of the physical environment can influence creativity. In 2007, Joan Meyers-Levy at the University of Minnesota, reported that the height of a room's ceiling affects how people think. Her research indicates that higher ceilings encourage people to think more freely, which may lead them to make more abstract connections. Low ceilings, on the other hand, may inspire a more detailed outlook.

    In additions to ceiling height, the view afforded by a building may influence an occupant's ability to concentrate. Nancy Wells and her colleagues at Cornell University found in their study that kids who experienced the greatest increase in greenness as a result of a family move made the most gains on a standard test of attention.

    Using nature to improve focus of attention ought to pay off  academically, and it seems to, according to a study led by C. Kenneth Tanner, head of the School Design & Planning Laboratory at the University of Georgia. Tanner and his team found that students in classrooms with unblocked views of at least 50 feet outside the window had higher scores on tests of vocabulary, language arts and maths than did students whose classrooms primarily overlooked roads and parking lots.

    Recent study on room lighting design suggests than dim（暗淡的） light helps people to loosen up. If that is true generally, keeping the light low during dinner or at parties could increase relaxation. Researchers of Harvard Medical School also discovered that furniture with rounded edges could help visitors relax.

    So far scientists have focused mainly on public buildings. "We have a very limited number of studies, so we're almost looking at the problem through a straw（吸管）," architect David Allison says. "How do you take answers to very specific questions and make broad, generalized use of them? That's what we're all struggling with."

    Going to university is supposed to be a mind-broadening experience.

    That assumption is possibly made in contrast to training for work straight after school. But is it actually true? Jessika Golle of the University of Tubingen, Germany, thought she would try to find out.

    Her result, however, is not quite what might be expected. It shows that those who have been to university do indeed seem to leave with broader and more inquiring minds than those who have spent their immediate post-school years in vocational training for work. However, it is not the case that university broadens minds. Rather, work seems to narrow them.

    After studying the early career of 2095 German youngsters, Dr. Golle reached the conclusion.

    During the period under investigation, Germany had three tracks in its schools: a low one for pupils who would most probably leave school early and enter vocational training; a high one for those almost certain to enter university; and an intermediate one, from which there was a choice between the academic and vocational routes.

    The team used two standardized tests to assess their volunteers. One was of personality traits and the other of attitudes. They administered both tests twice once towards the end of each volunteer's time at school, and then again six years later.

    Of the original group, 382 were on the intermediate track, and it was on these that the researchers focused. Of them, 212 went to university and the remaining 170 chosen for vocational training and a job.

    When it came to the second round of tests, Dr Golle found that the personalities of those who had gone to university had not apparently changed. Those who had undergone vocational training and then got jobs were not that much changed in personality, either except in one crucial respect they had become more responsible.

    That sounds like a good thing, compared with the common public image of undergraduates as a bunch of pampered layabouts(娇生惯养的闲人). But changes in attitude the researchers recorded were more worrying. In the university group, again, none were detectable. But those who had chosen the vocational route showed marked drops in interest in tasks that are investigative and enterprising in nature.

    And that might restrict their choice of careers. Some investigative and enterprising jobs, such as scientific research, are, indeed off limits to the degreeless.

    But many, particularly in Germany, with its tradition of vocational training, are not. The researchers mention, for example, computer programmers, finance-sector workers and entrepreneurs as careers requiring these attributes.

    If Dr Golle is correct, and changes in attitude brought about by the very training Germany prides itself on are narrowing people's choices, that is indeed a matter of concern.

    Our most important institutions, our schools and our workplaces, are designed mostly for extroverts (性格外向者).

In the typical classroom, students are often divided into groups—four or five or more kids all facing each other. And kids are working on countless group assignments. Even in subjects like math and creative writing, which you think would depend on unaccompanied flights of thought, kids are now expected to act as committee members. As for the kids who prefer to go off by themselves or just to work alone, those kids are seen as outliers (局外人) often or, worse, as problem cases. And the vast majority of teachers believe that the ideal student is an extrovert as opposed to an introvert (性格内向者), even though introverts actually get better grades and are more knowledgeable, according to research.

The same thing is true in our workplaces. Now, most of us work in open plan offices, without walls, where we are subject to the constant noise and stare of our coworkers. And when it comes to leadership, introverts are routinely passed over for leadership positions, even though introverts tend to be very careful, much less likely to take outsize risks —which is something we might all favor nowadays. And interesting research by Adam Grant at the Wharton School has found that introverted leaders often deliver better outcomes than extroverts do, because when they are managing thoughtful employees, they're much more likely to let those employees run with their ideas.

    In fact, some of our great leaders in history have been introverts. I'll give you some examples. Eleanor Roosevelt, Rosa Parks, Gandhi -- all these people described themselves as quiet and soft-spoken and even shy. However, they all took the spotlight, even though every bone in their bodies was telling them not to. And this turns out to have a special power, because people could feel that these leaders were in control, not because they enjoyed directing others and not out of the pleasure of being looked at; they were there because they had no choice, because they were driven to do what they thought was right.

    Now in 2019, jazz music is an important part of Indianapolis' art culture. Jazz clubs around the city still host concerts with local jazz musicians like Rob Dixon and Joel Tucker. One of these clubs, the Chatterbox Jazz Club, still has live jazz seven nights a week.

    But the real history of jazz in Indy is much less simple. Along with the Avenue's culture, jazz music was gone from the streets for many years.

    Indiana Avenue was the heart of a neighborhood along the White River. It was a center for black music and live street music. The wealthy avoided this area. So it became a place that poorer families, including many African-American and immigrant (移民) families, moved to.

    Jazz prospered in the mix of American cultures around the Avenue in the 1930s and 1940s. But in the 1950s, things changed. After the war, there were projects to make the city beautiful and build a university nearby. Both of these seemed like good changes. However, the new university and buildings caused poorer families to have to leave the area. This destroyed the Indiana Avenue community - and with it, its jazz culture.

    After many years, Indianapolis remembered the value of its arts and music culture. It began to bring back lost cultures such as live music on the Avenue. To do so, it began to make new changes. The changes included repairing historic areas like the Avenue. Once again, the high living costs in these historic arts areas pushed low-income families out.

    Today there are several old-style jazz clubs where friends can meet up to remember the past or just enjoy a summer evening. It might seem at first that jazz is alive again, but there is a sad reality behind these jazz clubs: Modern Indy jazz is only a shadow (影子) of the lively culture that was once on Indiana Avenue.

The United Kingdom has several names and many people {#blank#}1{#/blank#}（confuse) by them. In the 16th century, the nearby country of Wales was joined to the Kingdom of England. Later,the country Scotland and the Kingdom of Ireland joined the country {#blank#}2{#/blank#}（form) the United Kingdom of Great Britain and Ireland.

{#blank#}3{#/blank#}（final) , in the 20th century,the southern part of Ireland broke away from the United Kingdom, {#blank#}4{#/blank#}resulted in the full name today:the United Kingdom of Great Britain and Northern Ireland.

The four countries {#blank#}5{#/blank#} (belong) to the United Kingdom work together in some areas. They use the same flag, {#blank#}6{#/blank#}(know) as the Union Jack, as well as share the same currency and military defence. However,there are some {#blank#}7{#/blank#}（different)between them.

The United Kingdom has a long and interesting history to explore,which can help you learn more about the country and its traditions. Wherever you go in the UK,you are surrounded {#blank#}8{#/blank#}evidence of four different groups of people who took over at different times throughout history.

The first group, the Romans, came in {#blank#}9{#/blank#}first century. Some of their great achievements included building towns and roads. Next,the Anglo-Saxons arrived in the fifth century. They introduced the beginnings of the English language. The Vikings came in the eighth century, left behind lots of new vocabulary. The last group were the Normans. They had castles {#blank#}10{#/blank#} (build) all around England,and made changes to the legal system.