Friday, June 28, 2013

High-carb meals pique cravings for more, study says - LA Times


Tucking into a breakfast of buttermilk pancakes and maple syrup, or a great bowl of white pasta for lunch, not only sends your blood sugar soaring--and then, suddenly, plummeting. Four hours after you've put down your fork, such a meal makes you hungrier than if you'd eaten one with more protein and fiber and fewer carbohydrates, a new study finds.
The study also demonstrates that four hours later, the echo of that meal activates regions of the brain associated with craving and reward seeking more powerfully than does a meal with a lower "glycemic load."
The result: At your next opportunity to eat, you'll not only be hungrier; you'll be looking for more of the same.
The study, conducted by researchers from Harvard Medical School and Boston Children's Hospital, was published this week in the American Journal of Clinical Nutrition. The team was led by Dr. David S. Ludwig, director of Boston Children's Hospital Obesity Prevention Center and author of Ending the Food Fight: Guide Your Child to a Healthy Weight in a Fast Food/Fake Food World.
And what's the result of repeating this cycle meal after meal? The Harvard researchers surmise that the striatum, a key node in the brain's reward circuitry, may lose its sensitivity to the neurotransmitter dopamine, increasing a person's drive to eat high-carb foods and disrupting his or her ability to control that impulse.
carbs hunger addiction
Eating a meal with a high glycemic load sends blood glucose levels high, boosts hunger, and piques a desire for more, says a new study. (Jay L. Clendenin / Los Angeles Times)


Thursday, June 20, 2013

Chester Peace Arts and Leadership Camp Fundraiser - June 23rd


Food Marketing to Children and Youth: Threat or Opportunity? - Institute of Medicine



http://www.iom.edu/reports/2005/food-marketing-to-children-and-youth-threat-or-opportunity.aspx?utm_source=Twitter&utm_medium=Tweet&utm_campaign=Hootsuite

Food Marketing to Children and Youth: Threat or Opportunity?

Released:
December 5, 2005
Type:
Consensus Report
Topics:
Children, Youth and Families, Food and Nutrition
Activity:
Food Marketing and the Diets of Children and Youth
Boards:
Food and Nutrition Board, Board on Children, Youth, and Families

Thursday, June 6, 2013

Could Bookless Libraries Revolutionize Access for the Poor?


For a long time, you could divide the library patrons of San Antonio, Texas, into two categories -- the haves and the have nots.
Inside the city limits, there was a robust library system with 26 locations and a bookmobile. Outside, in the unincorporated suburbs of Bexar County, there was no public library. For many years, there wasn't even a book store.
Blame this on a fluke of funding. The city's library budget could only be spent on projects inside the city. This was fine, until the population of Bexar County exploded. Between 2000 and 2012, the county's population jumped from 1.4 million to 1.8 million people; and a third of those new arrivals ended up in the suburbs.
In 2000, 10 percent of the county's population lived in unincorporated areas, said Tina Smith-Dean of the county's Planning and Resource Management Department. “Now it's close to 15 percent,” she said, and by 2017, it's expected to be 18 percent.
"Patrons were getting farther and farther away from facilities," says Laura Cole, Bexar County's special projects coordinator. In response, the county pulled together funds for a sleek $1.5 million facility in the unincorporated part of the county. The 4,989-squre-foot library dubbed BiblioTech, slated to open this fall, will feature 150 e-readers (some of which patrons can check out for two weeks), 50 computer stations, 25 laptops, and 25 tablets. The project will run digital literacy courses, partner with local schools, and stay open late to ensure maximum access. Bexar's leaders have compared the project, in look and function, to an Apple store.
 
It will have everything -- except printed books. Instead, patrons will be able to "check out" material from their computers or smart phones, even if they aren't on the premises. So not only is this facility located closer to where much of the county now lives, but you don't even need to go there to take advantage of it.
 
For Bexar, a digital library was the most affordable way to address the egregious library access problems. "It seems like a really obvious kind of cost-effective solution," Coles says. "We wanted to create a true technology resource."
 

A rendering of Bexar County's new library. Courtesy of Bexar County
Bexar sees their bookless library as a model for other cities and counties, especially those where some neighborhoods have plentiful access to reading material -- and others simply don't.
And more often than not, those neighborhoods are under-served in other ways too. Lower income communities lag way behind when it comes to public library resources. Their libraries tend tostay open for fewer hours and offer fewer services. In Philadelphia, says Susan B. Neuman, a professor at the University of Michigan who studies these issues, libraries in poor neighborhoods had just two computers for every 100 children.
This is particularly unfortunate, because libraries provide vital services. Forty-four percent of Americans living below the poverty level access e-mail and the Web via their local public library, according to a 2009 report from the Bill and Melinda Gates Foundation.
But it's not clear whether digital libraries are the solution. Reading an e-book or using a computer requires a different skill set than reading a book; Neuman wonders if some people won't be able to use BiblioTech's myriad new resources to meet their needs. And American Library Association President Maureen Sullivan says licensing digital books is often more expensive then buything a paper copy.
She also wonders if we don't lose something when we abandon books altogether. "I think there's some value to the ability to hold a book in one's hand," Sullivan says, particularly when it comes to picture books for children. "There's something very special about the tactical experience, a personal connection that happens there."
But digital libraries do come with some advantages -- for one, they require less space. Collections can be put together in a matter of weeks, not months. And Sullivan says more and more readers are seeking out e-books. "People will come into the library and request a book, and they'll also request the format they want it in," she says. "It's really important for us to understand these developments and how people want to use them."
For now, Cole says the county will wait and see whether the community wants more brick-and-mortar technology centers or a deeper collection of digital material that can be accessed from anywhere in the cloud. "This is a pilot," she says. "We could find people are really, really utilizing the digital library more than we anticipated, or vice versa. Once we see how people use these spaces, we'll adapt our plans."

Friday, May 31, 2013

The Dictatorship of Data

Robert McNamara epitomizes the hyper-rational executive led astray by numbers.

Big data is poised to transform society, from how we diagnose illness to how we educate children, even making it possible for a car to drive itself. Information is emerging as a new economic input, a vital resource. Companies, governments, and even individuals will be measuring and optimizing everything possible.

But there is a dark side. Big data erodes privacy. And when it is used to make predictions about what we are likely to do but haven’t yet done, it threatens freedom as well. Yet big data also exacerbates a very old problem: relying on the numbers when they are far more fallible than we think. Nothing underscores the consequences of data analysis gone awry more than the story of Robert McNamara.



From MIT Technology Review 




From MIT Technology Review 

Justice Is in Our Nature

http://blogs.scientificamerican.com/guest-blog/2013/05/29/justice-is-in-our-nature/

Social contracts are written into our biology. As is the justice they need. The arc of our evolution has long bent towards the justice of “laws” fittest for team survival. We bred ourselves, by artificial selection, to internalize and feel strongly about social rules.
Christopher Boehm in Moral Originsconcludes, after intensive analysis of 50 representative hunter-gatherer cultures, that our ancestors likely experienced a “radical political change,” evolving from a hierarchic “apelike ‘might is right’…social order,” to become more egalitarian. About 250,000 years ago, their survival became a team sportbecause chasing big-game toward teammates was much more productive than solo hunting. But only if profit-sharing was sustainable. Even with fit teammates hunting needs luck (e.g. 4% success today). Then, as now, the logic of social insurance solved team problems by sharing profits and risks. Productivity gains in interdependent teams radically changed our evolution. Cooperators thrived. As did teams with the best adapted sharing rules, provided they were well enforced.
Boehm says all surviving hunter-gatherers enforce law-like social rules to prevent excessive egoism, nepotism, and cronyism. They use rebukes, ridicule, shame, shunning, exile and execution (typically delegated to close male kin of the condemned, to avoid inter-family feuding). For example, meat isn’t distributed by the successful hunter but by neutral stakeholders. Excessively dominant alpha-male behavior—like hogging more than a fair share of meat—is punished by “counterdominant coalitions.” If the strong abused their power they were eliminated, in a sort of inverted eugenics. Resisting injustice and tyranny are universal traits in today’s hunter-gatherers. They likely run 10,000 generations deep in our prehistory.
Social punishment created powerful selection pressures. Self-control becomes the lowest-cost strategy for avoiding social penalties. Shame and guilt likely evolved as mechanisms for internalizing the logic of team rules—a social contract written into our biology. We intuitively recognize what is considered punishable. And often punish ourselves. Cultures configure shame and guilt system triggers differently. But rules balancing short term individual selfish gain with longer-term or team interests are more evolutionarily productive. Thinking of our evolved urges as irresistible is a deep error, since self-control, especially relative to social rules, has long been needed for survival (see “evo-irresistible error”)
Our ancestors bred themselves to be team players. They used intelligently directed artificial selection of good cooperators as mates (“auto-domestication”). Bad cooperators were less likely to be selected for, or successful at, the hugely costly and highly collaborative business of raising long helpless offspring.
Justice, wrote Hesiod, poet of the ancient Greek masses and Homer’s rival, was “Zeus’s greatest gift” to us. Greatest or not, without it human nature wouldn’t be what it is. And we wouldn’t exist.

Tuesday, May 21, 2013

Intel Fuels a Rebellion Around Your Data


Big data and personal information are converging to shape the Internet’s most powerful and surprising consumer products. They’ll predict your needs, store your memories, and improve your life—if you let them.  Read more: http://www.technologyreview.com/businessreport/big-data-gets-personal/?utm_campaign=newsletters&utm_source=newsletter-daily-all&utm_medium=email&utm_content=20130522

Intel is a $53-billion-a-year company that enjoys a near monopoly on the computer chips that go into PCs. But when it comes to the data underlying big companies like Facebook and Google, it says it wants to “return power to the people.”
Intel Labs, the company’s R&D arm, is launching an initiative around what it calls the “data economy”—how consumers might capture more of the value of their personal information, like digital records of their their location or work history. To make this possible, Intel is funding hackathons to urge developers to explore novel uses of personal data. It has also paid for a rebellious-sounding website called We the Data, featuring raised fists and stories comparing Facebook to Exxon Mobil.