Dolphins (海豚) live in a dark underwater world. It's often impossible to see each other or anything else around them, so sound plays an important role in their survival. To communicate with each other, dolphins produce all kinds of sounds.

    Only other dolphins understand what the sounds mean. Scientists haven't uncovered their secret communication, except for one kind of whistle. It might last less than a second, but this whistle is a big deal. Why? Because these whistles are actually names of dolphins — and every dolphin has one. Scientists call these sounds a “signature whistle.” When other dolphins hear the whistle, they know which dolphin is calling.

    Dolphins often hunt by themselves but still need to stay connected to the group. Since they can't always see each other, dolphins use their signature whistles to check in with other dolphins hundreds of yards away. “In coastal areas, dolphins exchange whistles even when they're a third of a mile apart,” says Greg Campbell, who studies animals. That means dolphins shout out to group members that might be nearly five football fields away.

    What's amazing is who names the baby dolphin. Not the mother. Not an auntie dolphin or another group member. Scientists believe the baby dolphin itself comes up with the signature whistle. Like human babies, a baby dolphin plays with sounds throughout its first year. While testing its sound skills, a baby dolphin is doing something amazing. It's creating or figuring out its signature whistle. How or why it chooses its signature whistle is not clear. Studies show that most of the time the signature whistle is nothing like its mother's or group members' whistles.

    When the baby dolphin is about a year old, its signature whistle is set. It repeats it often so the other dolphins learn to recognize it.

    Deciphering(破译) dolphin names is just the beginning of figuring out what dolphins communicate about. Do they chat about sharks? Discuss the tides? Maybe they even have a name for people. Someday scientists are to decipher the rest of dolphins' communication.

    We're Hiring Shift Workers For Our Production Plant Looking for a career with a company that values its employees, and promotes from within? Then Black Cat Blades is the company for you!

Cutting Operators

CNC Operators

Heat Treat Operators

    Full training provided, starting at $14.50 per hour, with the potential to move to $18.16 in one year.

    We also require a Skilled Welder (焊接工),to work 12-hour rotating shifts (轮班) in our cutting Department. The successful candidate must be a registered journeyman（熟练工人) within the Province of Alberta or a Red Seal.

    We offer a great benefit package, including health, dental and RRSP's. Numerous motivations: Profit Sharing, Pay for Years of Service, Fitness Program Allowance, and fun social events for you and your family.

    Apply in person, and we'll take you on a tour of our Production equipment or forward your personal information by fax or e-mail.

    Black Cat Blades Ltd.

    HR@ blackcatblades.com

5604-59 St., Edmonton, AB T6B 3C3

Fax: (780) 465-9595

    A new study shows that rising levels of planet-warming gases may reduce important nutrients in food crops.

    Researchers studied the effects of one such gas—carbon dioxide—on rice. The researchers grew rice plants in a controlled environment. They set carbon dioxide levels to what scientists are predicting for our planet by the end of the century. They found that the resulting rice crops had lower than normal levels of vitamins, minerals and protein. The researchers said the effects of planet-warming gases would be most severe for the poorest citizens in some of the least developed countries. These people generally eat the most rice and have the least complex diets, they noted.

    In the experiment, scientists grew 18 kinds of rice in fields in China and Japan. They pumped carbon dioxide gas over the plants in an effort to create the atmosphere of the future. Rice grown under high carbon dioxide conditions had, on average, 13 to 30 percent lower levels of four B vitamins and 10 percent less protein. The crops also had 8 percent less iron and 5 percent less zinc（锌）an rice grown under normal conditions. However, vitamin E levels increased by about 13 percent on average.

    The results are bad news, “especially for the nutrition of the poorer population in less-developed countries,” said the University of Tokyo's Kazuhiko Kobayashi, who helped to write the report. That includes about 600 million people in Indonesia, Cambodia, Myanmar, Bangladesh, Laos and other nations, mainly in Southeast Asia, the report said.

    One of the scientists is Sam Myers of Harvard University in the American state of Massachusetts. He said that findings like this are an example of the surprises climate change create. “My concern is there are many more surprises to come,” he said.

    Myers noted that pollution, loss of some species, destruction of forests, and other human activities are likely to produce unexpected problems. He said that you cannot completely change all the natural systems that living organisms have grown to depend on over millions of years without having effects come back to affect our own health.

    The new study suggests a way to lower the nutritional harm of climate change. One way, Kobayashi said, is grow different forms of rice that have shown to be more resistant to higher carbon dioxide levels.

    Below you will find a profile of each gap year program. If there is a specific program you are interested in or a question you have regarding these programs, please feel free to contact them directly.

    Youth International

    Since 1997, Youth International has been providing many people with the most exciting and educational experience of their life. It is a learning program that combines international travel, inter-cultural exchange, home stays, volunteer community service work and outdoor adventures.

    Phone: 720-270-3323

    Carpe Diem Education

    Through volunteer service, travel and cultural exchange, students of Carpe Diem Education receive a personal insight into themselves and their cultures. We specialize in guiding summer and semester programs for high school students. Each course is carefully crafted to develop leadership and self-awareness within our students, who return home better prepared to be leaders in thought and action.

    Phone: 503-285-1800

    Center for Interim Programs

    Founded in 1980, Center for Interim Programs is the first independent gap-year organization in America. Based on students' interests and budget, our experienced teachers help make individual course choices including: low cost volunteer options, language programs, research trips, and so on. We are committed to helping students find more experiences of formal education and work.

    Phone: 413-585-0980

    EF Gap Year

    EF Gap Year offers students the ability to explore several countries where you will learn a language, volunteer for a good cause, gain international work experience. Choose between a 12-week semester or 26-week academic year. You can then personalize your program to meet your learning goals and interests by deciding where, when, and how you wish to study on your own. Our well-structured curriculum even allows you to place out of college-level classes and earn advanced credits toward graduation.

    Phone: 800-726-9746

    My mother has a dining table which sits right in the middle of her dining room. It was once buried beneath piles of papers—magazines, articles, copies of schedules for vacations she took back in the 1990s, and baby pictures of grand children who are now paying off their college loans.

    My brother Ross and I recently flew to New York to visit my mother. "Mom, why don't we go through all that stuff?" Ross said. "No. Don't touch it!" My mother said. The next afternoon, when she couldn't find a bill she needed, Ross suggested it might be put somewhere in the dining room and that we find it together. "Besides," he said, "all those papers are clearly stressing you out." However, my mother just said, "Are you boys hungry?" And then she seemed to have lost herself in deep thought.

    On our last night there, my mother walked up to us with a small pile of unopened mails, which she had collected at the western edge of the dining table, and said, "Help me go through these." "Sure," I said. When we had succeeded in separating wheat from chaff (谷壳), I asked, "Would you want to deal with another little pile of papers?"

    My mother led the way  walking into the dining room the way an animal manager might be while entering a cage with tigers in it. Ross and I came in behind her and suddenly he reached for a pile of the papers on one side of the table. "No!" my mother said sharply. "Let's start at the other end. That's where the older stuff is." Finally, we threw 95 percent of the stuff into paper shopping bags. Then I asked what she wanted us to do with them, she surprised us all by saying, "Put them in the incinerator (垃圾焚化炉)."

    When I returned home, inspired by the visit to my mother, I sorted out my own accumulated(累积的) piles of papers, sold or gave away half of my possessions, and moved into a smaller house. It seems that my life has been cheaper and easier since then. And it proves that a small change does make a big difference.

    "If they hated me they didn't talk to me about it," says a young German manager at a media firm in Frankfurt. Still, he says it was noticeable that when an employee 20 years older than him thanked him for buying lunch he had to swallow twice before adding the word "boss".

    Older workers sometimes envy being managed by a younger colleague. Precocious (老成的) youngsters, too, can feel awkward about bossing their elders around. But in Germany a shortage of skilled workers means that such situations are becoming even more common.

    The country's population is projected to shrink. As more Germans retire, fewer youngsters are entering the work-place to replace them. As a share of the working population the number of 15-to-24-year-olds has fallen by ten percent since the 1980s, says the German Federal Employment Agency. Firms competing to hire young talent have to promote them earlier as a result. A paper by professors at the university of Cambridge and WHU, a German business school, to be published in the Journal of Organizational Behavior, suggests this could be a problem.

    As in many countries, German work-places are legally obliged to overlook age when deciding whom to promote. Yet according to Jochen Menges, one of the authors, when an ordinary worker leap-frogs a more experienced one it can leave the latter with feelings of "anger, fear and disgust." People tend to judge their own standing by the success of their peers, and to see failure in being bossed about by someone younger. The relationship between feelings of anxiety and the age of the boss is clear, according to Mr Menges. A manager who is younger by one year is somewhat unsettling; a gap of 20 years is far more discouraging.

    German firms certainly shouldn't return to a system in which age equals to rank. But young people tend to be sensitive about managing upwards. And older workers should be encouraged to see the bright side of learning new skills. Daimler, a big German car firm, says it promotes age- mixed teams, so that knowledge can be transferred between generations. It also supports young managers by asking retired employees to provide temporary support.