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A new generation

July 21, 2012Uncategorizeda new generation, a new generation draws the line, a new generation in international strategic management, a new generation of, amityville a new generation, and, children, conservation for a new generation, first, home, how, in, it's a new generation, john f kennedy and a new generation, lives, million, new generation, newgeneration org, next generation, not, Not Generation, of, or, partnership for a new generation of vehicles, Pew Hispanic Center, ricky dillard new generation, Ruben Rumbaut, Ruben Rumbaut University California Irvine, second, star treck new generation, startrek new generation, the taste of a new generation, there's a new generation, to, US, we are a new generation, we are we are a new generation, workVincent Yong

Campaigners want the legal limbo of young immigrants resolved 

They were brought to the US at a young age by the parents, first generation immigrants who often still have close ties to their home countries.

Younger brothers and sisters were born in America, second generation immigrants who enjoy the status of US citizens.

Not Generation 1.5. Despite having lived most of their lives in the US and speaking fluent English, many cannot legally work, vote or drive in most US states.

They are subject to arrest and deportation just like any other undocumented migrant.

“They fear being deported but many of them don’t know (anything) other than English, so they have no idea what awaits (them) in their countries of origin, said Ruben Rumbaut of the University of California in Irvine, who coined the Generation 1.5 term.

There are no official figures of how many undocumented children live in the US, but the Pew Hispanic Center estimates that 7% of all Hispanic children are unauthorised immigrants.

This suggest there are 1.1 million Latino children who are not US citizens.

Living robots powered by muscle

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The robot is a dramatic example of the marriage of biotechnology with nanotechnology

Tiny robots powered by living muscle have been created by scientists at the University of California, Los Angeles.

The devices were formed by “growing” rat cells on microscopic silicon chips, the researchers report in the journal Nature Materials.

Less than a millimetre long, the miniscule robots can move themselves without any external source of power.

The work is a dramatic example of the marriage of biotechnology with the tiny world of nanotechnology.

In nanotechnology, researchers often turn to the natural world for inspiration.

But Professor Carlo Montemagno, of the University of California, Los Angeles, turns to nature not for ideas, but for actual starting materials.

In the past he has made rotary nano-motors out of genetically engineered proteins. Now he has grown muscle tissue onto tiny robotic skeletons.

Living device

Montemano’s team used rat heart cells to create a tiny device that moves on its own when the cells contract. A second device looks like a minute pair of frog legs.

“The bones that we’re using are either a plastic or they’re silicon based,” he said. “So we make these really fine structures that mechanically have hinges that allow them to move and bend.

“And then by nano-scale manipulation of the surface chemistry, the muscle cells get the cues to say, ‘Oh! I want to attach at this point and not to attach at another point’. And so the cells assemble, then they undergo a change, so that they actually form a muscle.

“Now you have a device that has a skeleton and muscles on it to allow it to move.”

Under a microscope, you can see the tiny, two-footed “bio-bots” crawl around.

Professor Montemagno says muscles like these could be used in a host of microscopic devices – even to drive miniature electrical generators to power computer chips.

But when biological cells become attached to silicon – are they alive?

“They’re absolutely alive,” Professor Montemagno told BBC News. “I mean the cells actually grow, multiply and assemble – they form the structure themselves. So the device is alive.”

The notion is likely to disturb many who already have concerns about nanotechnology.

But for Carlo Montemagno, a professor of engineering, it makes sense to match the solutions that nature has already found through billions of years of evolution to the newest challenges in technology.

Experts urge screening for obesity in kids

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Experts urge screening for obesity in kids

Doctors should screen children and teens between 6 and 18 years for extra pounds, a federal task force recommends.

For children who are found to be obese based on their body mass index (BMI), a standard measure of the relationship between height and weight, the task force also calls for referrals to a comprehensive program that includes dietary advice, physical activity, and behavioral counseling to promote weight loss.

The new recommendations update earlier ones from 2005. Skyrocketing rates of obesity have reached between 12 and 18 percent in 2- to 19-year-olds, increasing up to 6-fold since the 1970s, members of the United States Preventive Services Task Force report in the February issue of the journal Pediatrics. Obesity is linked to the early development of diabetes and high blood pressure.

For their update, the task force reviewed 13 studies of behavioral intervention in 1258 obese children and adolescents.

Moderate- to high-intensity programs, involving more than 25 hours of contact with the child and/or the family over a six-month period, resulted in a decrease in BMI 12 months after the beginning of the intervention.

In addition to dietary and physical activity counseling, effective programs included behavioral-management techniques such as self-monitoring and eating management. However, the programs only worked in children who followed through on treatment.

Harms of screening — for example, adverse effects on growth, eating-disorder pathology, or mental health issues — were judged to be minimal.

It is unclear if the recommendations can be applied to children who are overweight but not obese. And there was no convincing support for interventions that lasted less than 25 hours per six months, or for screening children below age 6.

Yet some experts take issue with what they consider the narrow age bracket of the recommendation.

“The USPSTF falls short of the mark in not recognizing the developmental trajectory of obesity in childhood,” writes Dr. Sandra G. Hassink, from the Dupont Hospital for Children in Wilmington, Delaware, in a related commentary.

Hassink urges pediatricians to screen all children. “Working with families to screen for high-risk nutrition and activity behaviors that contribute to obesity in early childhood must be part of that task,” she writes.

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