Dujiangyan is the oldest man-made water system in the world, and a wonder in the development of Chinese science. Built over 2,200 years ago in what is now Sichuan Province in Southwest China, this amazing engineering achievement is still used today to irrigate over 6,000 square kilometres of farmland, take away floodwater and provide water for 50 cities in the province.

    In ancient times, the region in which Dujiangyan now stands suffered from regular floods caused by overflow from the Minjiang River. To help the victims of the flooding, Li Bing, the region governor, together with his son, decided to find a solution. They studied the problem and discovered that the river most often overflowed when winter snow at the top of the nearby Mount Yulei began to melt as the weather warmed.

    The simplest fix was to build a dam, but this would have ruined the Minjiang River. So instead Li designed a series of channels built at different levels along Mount Yulei that would take away the floodwater while leaving the river flowing naturally. Better still, the extra water could be directed to the dry Chengdu Plain, making it suitable for farming.

    Cutting the channels through the hard rock of Mount Yulei was a remarkable accomplishment as it was done long before the invention gunpowder and explosives. Li Bing found another solution. He used a combination of fire and water to heat and cool the rocks until they cracked and could be removed. After eight years of work, the 20-metre-wide canals had been carved through the mountain.

    Once the system was finished, no more floods occurred and the people were able to live peacefully and affluently. Today, Dujiangyan is admired by scientists from around the world because of one feature. Unlike modern dams where the water is blocked with a huge wall, Dujiangyan still lets water flow through the Minjiang River naturally, enabling ecosystems and fish populations to exist in harmony.

    Leonardo da Vinci, one of the greatest thinkers in the world, began his career as an artist. Very little is known about Leonardo's early life. He was born in 1452 in the town of Vinci. As a boy, Leonardo showed a great interest in drawing, sculpting and observing nature.

    However, because Leonardo was born to parents who were not married to each other, he was barred from some studies and professions. He trained as an artist after moving to Florence with his father in the 1460s. It was an exciting time to be in Florence, one of the cultural capitals of Europe. Leonardo trained with one of the city's very successful artists, Andrea del Verrocchio. He was a painter, sculptor and gold worker. Verrocchio told his students that they needed to understand the body's bones and muscles when drawing people.

    Leonardo took the teacher's advice very seriously. He spent several periods of his life studying the human body by taking apart and examining dead bodies. While training as an artist, Leonardo also learned about and improved on relatively new painting methods at the time. One was the use of perspective(透视) to show depth. A method called “sfumato” helped to create a cloudy effect to suggest distance. “Chiaroscuro” is a method using light and shade as a painterly effect.

    Leonardo's first known portrait now hangs in the National Gallery in Washington, D. C. He made this painting of a young woman named Ginevra de' Benci around 1474. The woman has a pale face with dark hair. In the distance, Leonardo painted the Italian countryside.

    He soon received attention for his extraordinary artistic skills. Around 1475 he was asked to draw an angel in Verrocchio's painting “Baptism of Christ.” One story says that when Verrocchio saw Leonardo's addition to the painting, he was so amazed by his student's skill that he said he would never paint again.

    Teaching materials for learning Chinese are provided here. There are sites where you may find interesting instructions suitable for you. Here are some sites to begin your surfing.

    You may start with these pages from this website — just to get a little taste of it without working too hard.

    A Is For Love

    Flash cards for learning a few Chinese words

    Listening to the sound of Chinese

    Play a few words of Chinese on your computer.

    A few Chinese words

    Each word is enlarged for easy study.

    If you are studying Chinese, these tools can help.

    Zhongwen site

    More than a dictionary!

    Clavis Sinica

    Excellent program by Professor David Porter. It displays a whole document in Chinese [GB] or [BIG5], and gives individual word's definition, pronunciation as well as much more information when you click on that word. If you are studying Chinese, this is a very useful tool.

    Chinese Character Visual Dictionary

    If you like to know more, go to the following sites on the Internet.

    The Chinese Outpost

    Pronunciation, Character and Grammar By Mark Andrew Baker. The best. A must-visit site.

    Learn Cantonese / Mandarin Online

    Internet Based Chinese Teaching and Learning

    Rainland Kids discover Chinese — Site is in Germany

    If you want to have a better understanding of China, go to this one.

    Wanfang Data

    As an affiliate (分支) of Chinese Ministry of Science & Technology, Wanfang Data has been the leading information provider in China since 1950s. With a wide range of database resources and value-added services, Wanfang Data has become a gateway to understanding Chinese culture, medicine, business, science, etc.

    We are looking for a full-time nanny to help care for our young children. This position is suitable for people with 3 years or less teaching experience that are looking for a new direction or a break from teaching. It is also suitable for school leavers.
    Responsibilities will include:

    Helping us take care of our young children

    Handling small projects and light housework as needed

    Please apply by sending your resume(简历) to prudolph@architects.com.

    Pre Kindergarten(幼儿园) Teachers

    Are you energetic and believe that children learn best through play-based activities? We do, too. At Montgomery Child Care Association, we try hard to provide the best early care and education for children. Our salary(薪水) and benefits package is one of the best in the industry. An AA (a two-year college degree in the US) or higher in Early Childhood Education plus previous experience with children in a child care setting is preferred.

    Consider a career with us! E-mail: resumes@mccaedu.org.

    Learning Center Instructor

    School on Wheels is a non-profit(非盈利的) organization to support the educational needs of homeless children. We are now searching for an experienced teacher to instruct children during the after-school program at our Downtown Los Angeles Learning Center.

    You should have 3 + years teaching experience and excellent communication skills. Knowledge of the Spanish language is required.

    Please apply by e-mailing your resume to administration@schoolonwheels.org.

    Special Education Teacher

    An exciting teaching opportunity is offered by De LaSalle Academy, a non-profit school for 96 students with special learning needs. De LaSalle Academy has very high expectations for teacher performance, particularly in the areas of teacher-student-parent relationship, classroom management, high level of understanding of disabilities of the student and the ability to recognize student needs.

    If you are 25-35 and have experience in special education, you could be the person we are looking for.

    Please e-mail to imoreau@delasallefm.org.

    Let's face it. No one drinks diet sodas for the taste. People drink diet sodas in the hope that it will help them lose weight or at least keep them from gaining it. Yet it seems to have exactly the opposite effect, according to a new study.

    Researchers from the University of Texas said those who drank two or more diet sodas a day had waist size increases that were six times greater than those who didn't drink diet sodas. "What we saw was that the more diet sodas a person drank, the more weight they were likely to gain," said Sharon Fowler.

    The study was based on data from 474 participants in a large, ongoing research project, where the participants were followed for nearly 10 years.

    While the findings are surprising, they also offer some explanations.

    Nutrition expert, Melanie Rogers, who works with overweight patients in New York, has found that when patients are switched from regular to diet sodas, they don't lose weight at all. "We weren't seeing weight loss necessarily, and that was confusing to us," said Rogers.

    So why would diet soda cause weight gain? No one knows for sure yet, but it could be that people think they can eat more if they drink diet sodas, and so over-compensate(补偿) for the missing calories.

    A related study found some sweeteners (甜味剂) raised blood sugar levels in some mice. "Data from this and other potential studies suggest that the promotion of diet sodas and artificial sweeteners may be risky," said Helen P. Hazuda, professor at the University of Texas's school of medicine. "They may be free of calories, but not of consequences."

    Visit Nashville, Tennessee, the capital of country music and the home of the Grand Ole Opry. Forty -day bus tour starts from Pittsburgh.

    Departures August 23, September 13, September 27, October 11, October 25.

$185 per person based on double occupancy. Includes private motor coach from Pittsburgh, hotel rooms, reserved tickets for the Grand Ole Opry. Country Festival Friday and Saturday nights, sightseeing tour of Nashville, admissions to places of interest.

    For information, free booklets, and reservations, call 4212 — 6060. Travel and Tours, 2245 Market Street, Pittsburgh, Pennsylvania 15219. 14-day advanced booking required. Visa and Master Card payment welcome.