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.”

    Do you want to get home from work knowing you have made a real difference in someone's life?

    If yes, don't care about sex(性别) or age! Come and join us, then you'll make it!

Position: Volunteer Social Care Assistant (No Pay with Free Meals)

Place: Manchester

Hours: Part Time

    We are now looking for volunteers to help people with learning disabilities(障碍) to live active lives! Only 4 days left. Don't miss the chance of lending your warm hands to help others!

Role:

    You will provide people with learning disabilities with all aspects(方面) of their daily lives. You will help them to develop new skills. You will help them to protect their rights and their safety. But your primary concern is to let them know they are valued.

Skills and Experience Required:

    You will have the right values and great listening skills. You will be honest and patient. You will have the ability to drive a car and to communicate in fluent(流利的) written and spoken English since you'll have to help those people with different learning disabilities. Previous(之前的) care-related experience will be a great advantage for you.

    After returning from her round trip, the angry woman stood outside the ticket office of the station. “The railway owes me 12 pounds，” she said to Harry Jenks, the young man working at the office. “You sold me a ticket for May 22nd, but there was no ship from Jersey that night. So my daughter and I had to stay in a hotel. It cost me 12 pounds.”

    Harry was worried. He remembered selling the woman a return ticket. “Come into the office, Madam，” he said politely. “I'll just check the Jersey timetable for May 22nd.”

    The woman and her little girl followed him inside. She was quite right, as Harry soon discovered. There was no sailing on May 22nd. How could he have made such a careless mistake? He shouldn't have sold her a ticket for that day. Wondering what to do, he smiled at the child. “You look sunburnt，” he said to her. “Did you have a nice holiday in Jersey？”

    “Yes，” she answered, shyly. “The beach was lovely. And I can swim too！”

    “That's fine，” said Harry. “My little girl can't swim a bit yet. Of course，she's only three ...”

    “I'm four，” the child said proudly. “I'll be four and a half.”

    Harry turned to the mother. “I remember your ticket, Madam，” he said. “But you didn't get one for your daughter, did you？”

    “Err, well ...” the woman looked at the child. “I mean …, she hasn't started school yet. She's only four.”

    “A four-year-old child must have a ticket, Madam. A child's return ticket from Jersey costs .., let me see ... 13.50 pounds. The law is the law, but since the mistake is mine ...”

    The woman stood up, took the child's hand and left the office.

All Aboard for a Family Trip by Train

    If you're looking for a family vacation idea, look no further. Explore America with Amtrak. On the train, your family will have plenty of room to spread out and relax.

    Once on board, the family can take in the scenery from the Sightseer Lounge（观景车厢）. Plus, most of our overnight trains feature Dining cars that serve three meals a day, with full menus and table service. If you're looking for lighter fare, grab a bite to eat or a drink in the Café car. You can also reserve Sleeping car accommodations and let the gentle rhythms of the train sway you to sleep. It's the best way to arrive at your destination rested and ready to go.

    Learn More about the Onboard Experience on www.amtrak.com

    A Dining Experience like No Other

    From full sit-down meals to more informal food service, many trains have one or more option for onboard dining. If you're not hungry, you might start to hear your stomach rumbling（腹鸣） after looking at our menus. We provide you with more dining choices, onboard dining reservations and the different types of dining cars, like long distance dinning car, lounge car and café car.

    Sleeping Accommodations

    Sleeping accommodations are available on most long-distance routes. Amtrak trains traveling on long-distance routes typically use either two-level Superliner or one-level Viewliner train car equipment, each of which include bedrooms arranged in various configurations and private and public bathrooms and showers.

    Seating Accommodations

    On most Amtrak trains, you have three options for seating accommodations. The availability of these options varies depending on your route and the type of train equipment in use:

    Coach Class: Designed for You to Relax.

    Business Class: More Amenities. More Comfort.

    First Class: Exclusively on Acela Express.

    Jim suffered heart problems. In conversation he expressed little joy and it seemed that his life was drawing to a close.

    When his heart problems led to operation, Jim went through it successfully, and a full recovery was expected. Within days, however, his heart was not beating properly. Jim was rushed back to operation, but nothing was found to explain the cause of his illness. He died on the operating table on the day before his 48th birthday.

    Dr. Bruce Smoller, a psychologist(心理学家), had had many conversations with him, and the more he learned, the stranger he realized Jim's case was. When Jim was a child, his father, a teacher, suffered a heart attack and stayed home to recover. One morning Jim asked his father to look over his homework, promising to come home from school at noon to pick it up. His father agreed, but when Jim returned his father had died. Jim's father was 48.

    "I think all his life Jim believed he killed his father," Dr. Smoller says. "He felt that if he had not asked him to look at his homework, his father would have lived. Jim had been troubled by the idea. The operation was the trial(判决) he had expected for forty years." Smoller believes that Jim willed himself not to live to the age of 48.

    Jim's case shows the powerful role that attitude(态度) plays in physical health, and that childhood experiences produce far-reaching effect on the health of grown-ups. Although most cases are less direct than Jim's, studies show that childhood events, besides genes, may well cause such midlife diseases as cancer, heart disease and mental illness.

The Valley Art Center energizes and encourages art appreciation in people of all ages and backgrounds through education, inspiration, and opportunities to experience the visual arts. We support art students and artists through quality curriculum and programming along with exhibition space. We promote the growth of each individual's potential and the advancement of the arts in the community.

Basic Oil Painting

This course, with a four-hour format, is for serious artists of all levels from beginners to advanced learners. Guidance will be offered on issues such as composition, colors, tools and techniques, but the emphasis of the course will be on thinking creatively. Individual attention will be available whenever needed. The course will end up with a group discussion of the students' works.

IMPORTANT: students will be responsible for bringing all necessary materials, including any desired photographic reference. Supply list is available online. And don't forget your lunch. $192/$173.

Digital Photography for the Fraidy Cat

Learn the basics of digital photography. We will start with understanding what those symbols on your camera mean. We will explore how to set your own film speed, aperture (孔径) and shutter (快门) speed. We will also learn when to use a flash. We will explore taking action shots, landscapes and family portraits (全家福). In this class you will practice and apply what you have learned using your camera! $96/$86.

Drawing for the Fraidy Cat

Everyone can draw! If you have ever wanted to learn how to draw or just want to refresh yourself in drawing basics, then this is the class for you. This class will focus on building drawing skills through the use of line, value, perspective, and composition. Students will work on a variety of projects with different drawing mediums to develop their personal style. A list of suggested supplies is available online. $96/$86.

Enamel on Metal

In this art form, drawing skills are not required for this colorful and expressive craft. Beginners learn several basic classical techniques and those with experience are guided in other techniques of choice. For those who are making jewelry, this is another form to add to your artist's toolbox!

All equipment and supplies are included in the first project fee of $8, payable to the instructor at the first class. $96/$ 86.