Article: SALT LAKE CITY, March 1, 2010 --- Like silkworm moths , butterflies and spiders, caddisfly larvae spin silk, but they do so underwater instead of on dry land. Now, University of Utah researchers have discovered why the fly's silk is sticky when wet and how that may make it valuable as an adhesive tape during an operation. "Silk from caddisfly larvae may be useful some day as a medical adhesive for sticking wet tissues," says Russell Stewart, an associate professor of bioengineering and principal author of a new study of the fly silk's chemical and structural properties. "I picture it as sort of a wet Band-Aid, maybe used inside in operations --- like using a piece of tape to close a cut," he adds. "Gluing things together underwater is not easy. Have you ever tried to put a Band-Aid on in the shower? This insect has been doing this for 150 million to 200 million years." There are thousands of caddisfly species worldwide. Some species spend their larval stages developing underwater, and build an inch-long, tube-shaped case or shelter around themselves using sticky silk and grains of rock or sand. Other species use silk, small sticks and pieces of leaves. Each larva has a head and four legs that stick out from the tube.The larval case gets wider as the larva grows.A caddisfly larva eventually pupates as it develops into an adult fly and then hatches. Caddisflies now live around the world in waters ranging from fast streams to quiet low lying wet land. The caddisflies'adaptation to diverse habitats is largely due to the inventive use by their larva of underwater silk to build complex structures for protection and food gathering. Caddisflies fall into two groups. Some build their case and then drag it along with them underwater as they search for food. Some build a shelter glued to a rock,with a silk net to catch passing food. Question: According to Russel Stewart, caddisfly larvae _ . Yes or no, is the answer "are worth researching"?
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Article: People often hear each others' voices without ever seeing the faces they belong to. "Nowadays we are talking away on the phone without meeting people," says Seung-Jae Moon. And from business conference calls to chat lines, people often imagine they would recognize the speaker if they saw him or her. Seung-Jae Moon, a linguist of Korea found that, under certain conditions, they're actually right. Moon decided to see just how close those mental pictures match up with reality and if there was any relation to how people speak rather than what they are saying. He recorded 16 Koreans, half men and half women, reading the same passage, and took a full-body photo and head shot of each speaker. Then he played the tapes for 361 Koreans and 173 Americans who did not speak Korean and asked his subjects to match up voice and picture. The Korean participants viewing full-body photos were quite perceptive. A majority linked 6 of the 8 women to the correct voice and did so for 5 of the 8 men. With the Korean group shown only faces, accuracy plummeted, but more than 20 percent of the subjects selected the same incorrect picture. The Americans showed no accuracy in matching the foreign voices to photos, but they too were consistent in their errors. That disconnection reveals conflicting ideas of physical and vocal beauty. Moon asked people to pick a favorite face and voice. Seventy percent of the Koreans picked one voice, but there was no agreement on a face. Americans didn' t agree on either count. And over 65 percent of both Koreans and Americans did not match their favorite face with their favorite voice. Moon hopes to use software to break voices into components like pitch and hoarseness to narrow down which elements trigger certain mental pictures. "If we can map which characteristics of the voice triggers what kind of linage, and it doesn't matter whether that image is the right or wrong one of the actual speaker, then we can create an image through voice,' he says. That capacity could help to create computer-synthesized... Question: He asked _ Korean women to speak and recorded their voices. Yes or no, is the answer "8"?
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Article: Parents often believe that they have a good relationship with their teenagers.But last summer,Joanna and Henry noticed a change in their older son:suddenly he seemed to be talking more to his friends than to his parents."The door to his room is always shut,"Joanna noted. Tina and Mark noticed similar changes in their 14-year-old daughter."She used to cuddle up with me on the sofa and talk,"said Mark."Now we joke that she does this only when she wants something.Sometimes she wants to be treated like a 1ittle girl and sometimes like a young lady.The problem is figuring out which time is which." Before age 11,children like to tell their parents what's on their minds."In fact,parents are first on the list,"said Michael Riera,author of Uncommon Sense for Parents with Teenagers."This completely changes during the teen years,"Riera explained."They talk to their friends first,then maybe their teachers,and their parents last." Parents who know what's going on in their teenagers' lives are in the best position to help them.To break down _ ,parents should create chances to understand what their children want to say,and try to find ways to talk and write to them.And they must give their children a mental break,for children also need freedom,though young.Another thing parents should remember is that to be a friend,not a manager,with their children is a better way to know them. Question: What can be learned from the passage? Yes or no, is the answer "Parents should try to understand their teenagers."?
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Article: Lost iPhone Unexpectedly, I lost my white iPhone 5s in Midtown on Friday night. It had a blue green cover on it. There are many pictures of my son in it, and I'm heartbroken. Please return, no questions asked. Reward. Reply to: -2652255359@craigslist. org Do you need a babysitter that you can trust? [:++] My name is Tina. I am a responsible babysitter that you can trust. If you are looking for someone dependable and affordable I am that person! I HAVE MORE THAN 30 YEARS OF EXPERIENCE (including disabled children)! I am a retired Home Health Aid and absolutely love children. I work with my sister Iris who has also more than 20 years' experience as a teacher's assistant. WE LOOK FORWARD TO MEETINC YOU! Available 24 hours and flexible with fees! I am fully bilingual--Spanish/English. Please email me or call 712-867-7688. I BABYSIT ONLY AT MY HOME I accept children from all ages. Fee starts from $100~$150 a week depending on the hours. I am very flexible and my fee can change. Feel free to contact me via email or on my cell phone 566-67-1873 and we can work something out. Part-time Chinese Babysitter Wanted Part-time Chinese speaking babysitter needed to assist with one-year-old twins and to perform some light housework as needed. Assistance needed Fridays and occasional weekends. Please provide your salary expectation. College students are welcome to apply. Reply to: comm-encbq-2652113885@craigslist. org Question: Who posted the lost and found information? Yes or no, is the answer "A parent."?
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