Archive | August, 2005

Parents can help teens choose 'good' friends, study finds

13 Aug

While parents often worry about the influence peers have on their adolescent children, a new study indicates that they can play a role in helping their teens choose ‘good’ friends.
The results showed teens are more likely to have good friends ones who don’t fight and who have plans for college, for instance if they have a warm relationship with their parents and if their parents choose to live in a neighborhood with high-quality schools.

Parents’ monitoring and supervision are also associated with adolescents’ choice of friends, but not as consistently.

“We know from many other studies that peers have a strong influence on the behavior of adolescents, so the process of friendship formation is important to understand,” said Chris Knoester, lead author of the study and assistant professor of sociology at Ohio State University.

“In fact, some scholars have even suggested that parents exert virtually no influence on their children’s behavior when they are teens — peers are seen as that much more important. However, we found evidence that parents can act as architects of the friendship choices that their children make.”

The researchers found that specific parenting practices are linked to friends’ characteristics even after taking into account the influence that parents themselves have on their children’s behaviors and the likelihood that their children will select friends who are similar to themselves.

Knoester conducted the study with two other Ohio State sociologists, assistant professor Dana Haynie and graduate student Crystal Stephens. Knoester presented the results Aug. 13 in Philadelphia at the annual meeting of the American Sociological Association.

The study used data from the National Longitudinal Study of Adolescent Health, which included interviews with a national sample of 11,483 seventh to 12 th grade students and their parents.

The researchers thought that parents could influence their children’s choice of friends through manipulating their environment (such as choosing where they live), monitoring and supervising them, teaching them how to behave, and forming close relationships with them.

“We found that parent-child relationship quality, and choosing to live in a neighborhood because of its good schools, is consistently linked to the characteristics of adolescents’ friends,” Knoester said.

A good-quality relationship is one in which parents and teens participate in activities together, communicate frequently, and express affection for one another.

When teens and parents reported good relationships, the teens had friends who were less likely to fight and be delinquent, and more likely to be involved in extracurricular activities at schools, have higher grade point averages, and have plans for college.

But when teens and parents reported conflict in their relationship, the teens were more likely to have friends who fought and were involved in delinquency, and who showed fewer prosocial characteristics, such as higher grade point averages.

Results also showed that when parents said they selected their neighborhood because of the good schools, their adolescent children tended to have more ‘good’ friends.

Knoester said the effects of parental supervision weren’t as clear in the study. For example, when parents were more familiar with their children’s friends, these friends tended to have more prosocial characteristics. But there was no link between parental familiarity and friends who participated in fewer delinquent activities.

Also, teens who had more autonomy from their parents tended to have friends who were more delinquent. But autonomy wasn’t always bad. When adolescents were more involved in extracurricular activities, the study found higher levels of autonomy encouraged teens to have friends who were also more involved in such activities.

Overall, the results of this research show that parents still have an important role in their children’s lives after they reach adolescence.

“Most people recognize that parents directly affect the behavior of their teens,” Knoester said. “However, our findings indicate that parents can also indirectly influence their children’s behaviors by shaping their choice of friends.

“Parents may be most likely to affect their children’s choice of friends by maintaining a positive relationship with their teen, with high levels of involvement and low conflict. They can also help by selecting a neighborhood with good schools and making an effort to get to know their children’s friends and other parents in the community.”

from Ohio State

Ambient Orb predicts weather

7 Aug

Smart Home features an “ambient orb” that changes color based on data it recieves over the cell phone network.

According to Smart Home:
“Check the stock market, weather, and instant messenger usage in living color
No subscription fee; no computer or Internet connection required
Works anywhere you can use a cell phone
Uses a nationwide wireless network to bring information to your Orb “

Link

Popular uses for mobile electronics

7 Aug

What do consumers do with their mobile electronics? They take pictures, get location-specific information, and watch T.V. The top 10 features they want, according to Parks Associates are:

1. Take Pictures
2. Receive location-specific information
3. Watch live TV
4. Browse the Internet
5. Voice Communication
6. Listen to Music
7. Listen to Satellite Radio
8. Email
9. Remote control home system
10. Record Memo/ Voice

ZDNet.com reports:
“Parks Associates asked Internet users regarding required functionality on their most frequently used mobile device. Picture-taking, location-specific information and TV streaming were among the most popular functions. “

Link

Mobile Phone for Kids

7 Aug

The first phone designed for children.
The firefly is a cell phone made just for kids ages 8 – 12. The founder wanted to stay in touch with his child while far away and and realized that there was no phone designed for children. With a mom and dad speed button, this phone has a simple design and will appeal to parents and children.

http://www.fireflymobile.com/

Link

First dog clone

3 Aug

The first dog has been cloned…

“South Korea’s pioneering stem cell scientist has cloned a dog, smashing another biological barrier and reigniting a fierce ethical debate while producing a perky, lovable puppy.

The researchers, led by Hwang Woo-suk, insist they cloned an Afghan hound, a resplendent supermodel in a world of mutts, only to help investigate human disease, including the possibility of cloning stem cells for treatment purposes.”

Link

Smart Nanotubes

2 Aug

Materials scientists working with biologists at the University of California, Santa Barbara have developed “smart” bio-nanotubes with open or closed ends that could be developed for drug or gene delivery applications.

The nanotubes are “smart” because in the future they could be designed to encapsulate and then open up to deliver a drug or gene in a particular location in the body. The scientists found that by manipulating the electrical charges of lipid bilayer membranes and microtubules from cells, they could create open or closed bio-nanotubes, or nanoscale capsules. The news is reported in an article to be published August 9 issue of the Proceedings of the National Academy of Sciences. It is currently available on-line in the PNAS Early Edition. See: http://www.pnas.org/cgi/content/abstract/0502183102v1

The findings resulted from a collaboration between the laboratories of Cyrus R. Safinya, professor of materials and physics and faculty member of the Molecular, Cellular, and Developmental Biology Department, and Leslie Wilson, professor of biochemistry in the Department of Molecular, Cellular and Developmental Biology and the Biomolecular Science and Engineering Program. The first author of the article is Uri Raviv, a post-doctoral researcher in Safinya’s lab and a fellow of the International Human Frontier Science Program Organization. The other co-authors are: Daniel J. Needleman, formerly Safinya’s graduate student who is now a postdoctoral fellow at Harvard Medical School; Youli Li, researcher in the Materials Research Laboratory; and Herbert P. Miller, staff research associate in the Department of Molecular, Cellular and Developmental Biology.

The scientists used microtubules purified from the brain tissue of a cow for their experiments. Microtubules are nanometer-scale hollow cylinders derived from the cell cytoskeleton. In an organism, microtubules and their assembled structures are critical components in a broad range of cell functions from providing tracks for the transport of cargo to forming the spindle structure in cell division. Their functions include the transport of neurotransmitter precursors in neurons.

“In our paper, we report on a new paradigm for lipid self-assembly leading to nanotubule formation in mixed charged systems,” said Safinya.

Raviv explained, “We looked at the interaction between microtubules negatively charged nanometer-scale hollow cylinders derived from cell cytoskeleton and cationic (positively charged) lipid membranes. We discovered that, under the right conditions, spontaneous lipid protein nanotubules will form.”

They used the example of water beading up or coating a car, depending on whether or not the car has been waxed. Likewise the lipid will either bead up on the surface of the microtubule, or flatten out and coat the whole cylindrical surface of the microtubule, depending on the charge.

The new type of self-assembly arises because of an extreme mismatch between the charge densities of microtubules and cationic lipid, explained Raviv. “This is a novel finding in equilibrium self-assembly,” he said.

The nanotubule consisting of a three-layer wall appears to be the way the system compensates for this charge density mismatch, according to the authors.

“Very interestingly, we have found that controlling the degree of overcharging of the lipid-protein nanotube enables us to switch between two states of nanotubes,” said Safinya. “With either open ends (negative overcharged), or closed ends (positive overcharged with lipid caps), these nanotubes could form the basis for controlled chemical and drug encapsulation and release.”

The inner space of the nanotube in these experiments measures about 16 nanometers in diameter. (A nanometer is a billionth of a meter.) The whole capsule is about 40 nanometers in diameter.

Raviv explained that the chemotherapy drug Taxol is one type of drug that could be delivered with these nanotubes. The scientists are already using Taxol in their experiments to stabilize and lengthen the lipid-protein nanotubes.

The work was performed using state-of-the-art synchrotron x-ray scattering techniques at the Stanford Synchrotron Radiation Laboratory (SSRL), combined with sophisticated electron microscopy at UCSB.

From University of California – Santa Barbara