A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.

     “It's extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components (元件),” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.

    They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it's connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.

    While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers' fields or on the battlefield. “Basically it should be able to take off, land and fly around,” he said.

    Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,” he said. “So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis.”

Importance of College Education

    During the high school career, students may begin to question the importance of a college education. They might find themselves asking, “Why is it important to go to college?” The answer is that, more than ever, college graduates enjoy much greater opportunities available to them than those who have not received a college education.

    For many high school students, being able to immediately generate an income after graduation is an appealing thought. They may also be affected by the rising cost of tuition, and while it is true that a higher education may be one of the largest expenses you will ever face, the importance of a college education has become quite evident in terms of earning potential within today's economy.

    Why should you go to college? One important answer to this question is more opportunity. As opposed to generations of the past, high school graduates today are unable to obtain high-paying jobs that were once available. The U.S. has been transformed from a manufacturing-based economy to an economy based on knowledge, and the importance of a college education today can be compared to that of a high school education forty years ago. It serves as the gateway to better options and more opportunity.

    There are additional reasons as to why it is important to go to college. When students experience a post secondary education, they have the opportunity to read books and listen to the lectures of top experts in their fields. This encourages students to think, ask questions, and explore new ideas, which allows for additional growth and development and provides college graduates with more opportunities in the job market over those who have not experienced a higher education.

    The importance of a college education is also stressed because of the opportunity to gain valuable resources during the study. The more connections which are collected during your college career, the more options you will have when you begin your job search. Once you have ended your job search and have started your career, however, the importance of a college education has not been exhausted. Having a college degree often provides for greater promotion opportunity.

    So, why should you go to college? The reasoning does not begin and end with the job aspect. A good education is beneficial from many different viewpoints, and though the importance of a college education is quite evident for many high school students, what is often not as clear is how they will pay for that education.

    We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded.

    When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration(迁移) is probably the migration of the fish, which is called “salmon”. This fish is born in fresh water but it travels many miles to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies there. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.

    Recently, scientists have studied the migration of a kind of lobster(龙虾). Every year, when the season of bad weather arrives, the lobster get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go.

    So, sometimes we know why humans and animals move from one place to another, but at other times we don't. Maybe living things just like travel.

    If you want to travel from Xi'an to Chengdu by train, it will take about 16 hours. But starting this month, the new Xi'an-Chengdu high-speed railway will shorten this travel time to three hours.

    The 643-kilometer line is China's first high-speed railway to run through the Qinling Mountains, which form a natural boundary (分界线) between China's north and south. With a speed of 250 km per hour, it's also the first mountain-heavy train line to provide a 4G network. Along the way, the train passes through two areas for rare (稀有) wild animals — one for pandas and the other for crested ibises (朱鹮).

    To reduce the railway's influence on the animals, workers and experts have designed and built the railway to be environmentally friendly. There were 345 wild pandas living in the Qinling Mountains. China currently has 1,864 wild pandas in total, according to the Xinhua News Agency.

    To avoid disturbing the pandas, the railway was designed to run through tunnels (隧道) within the area. Protective shields (防护屏) are placed near the entrance of each tunnel to stop animals from going in.

    To protect the thousands of crested ibises that fly near one part of the railway, protective nets have been set up to make sure the birds will not fly into a train.

    The nets are about 32 km long and 4 meters high. Experts tested different shapes and materials for building the nets before making their final choice.

    Canterbury College

    COURSE A

    This course will enable students to experience performing arts and the media at a basic level. It will give them the experience to decide if they wish to develop an interest in this field and to train their potential and adaptability for working in a performance company in either a performing or a technical role.

    COURSE B

    The aim of this course is to provide a series of training in business-related skills and a comprehensive knowledge of business practice. It is for students with a business learning experience who can manage a heavy workload.

    COURSE C

    This course gives a foundation for a career in caring for children, the elderly or people with special needs. Core units are Emergency Treatment, Communication and Information Technology. Practical training is an important part of the course.

    COURSE D

    This course is designed to provide an introduction to the construction industry. Units covered include Heat, Light and Sound, Introduction to the Urban Environment, Communication Processes and Techniques. All students will complete vocational assignments with work experience in the big companies.

    COURSE E

    The qualifications gained and the skills developed on this course will provide a good basis for gaining employment in office work. In addition to word processing, the course also covers spreadsheets, computerized accounting, databases and desktop publishing. All students are given chances to develop their confidence, and advice and information is given on job search skills, presentation techniques and personal appearance.

    COURSE F

    This course is designed to provide a foundation in graphic and visual communication skills. Students complete units in picture composition and photographic processing alongside elements of graphic design, and gain hands-on experience of desktop publishing and presentations.

    When my father married my mother in 1943, he gave my mother a 1937 crown coin and told her to keep it in the back of her purse and not to spend it. This would mean that she always felt that she was protected and would always have money if she really needed it.

    When I was married in 1970, my husband, who had heard this story, obtained a 1937 crown coin for me and I have always kept it in my wallet, and I have always had enough for my needs.

    A friend recently fell on hard times, partly through external (外部的) circumstances and partly through poor planning. Friends and I have loaned her money, paid her bills, given her food, and even tried to teach her budget techniques, but none of them has been a solution. She has just slipped deeper and deeper into financial trouble and depression.

    Last week she looked pale and unwell, very depressed and hopeless, very sad for a friend to see and I then thought about how the crown coin, a physical reminder of another's care and love had protected me, so I went to the bank for a $ 100 dollar-bill.

    I told my friend the story and asked her to keep the $ 100 in the back of her wallet. It turned out that she didn't have a wallet, so she put the money in a little pencil case where she kept her coins. She immediately felt better—"I feel rich, and thank you for being a good friend," she said, and we were both a bit teary.

    I went home and remembered a little wallet I had that I'd never used, and thought, "I'll give that to my friend." I opened it, and inside, found $ 100.