Tuesday, November 23, 2010

Growing Up Digital, Wired for Distraction?


[Edited from NY Times article by Beat Schwendimann]

Several recent studies show that young people tend to use home computers for entertainment, not learning, and that this can hurt school performance, particularly in low-income families. Jacob L. Vigdor, an economics professor at Duke University who led some of the research, said that when adults were not supervising computer use, children “are left to their own devices, and the impetus isn’t to do homework but play around.”

Research also shows that students often juggle homework and entertainment. The Kaiser Family Foundation found earlier this year that half of students from 8 to 18 are using the Internet, watching TV or using some other form of media either “most” (31 percent) or “some” (25 percent) of the time that they are doing homework. In a national study of over 2,000 young people, aged 8 to 18, researchers found that participants were able to squeeze the equivalent of 8.5 hours of electronic media into 6 chronological hours because of multitasking. By the time Net Generation kids reach their twenties, the typical teenager has spent over 20,000 hours on the Internet and over 10,000 hours playing video games of some kind (Source: Digital game-based learning).

Students’ use of technology is not uniform. Mr. Reilly, the principal of Woodside High School in California, says their choices tend to reflect their personalities: Social butterflies tend to be heavy texters and Facebook users (One student sends over 27,000 text messages per month (see video below). Students who are less social might escape into games, while drifters or those prone to procrastination might surf the Web or watch videos.



Researchers at the German Sport University in Cologne found that playing video games led to markedly lower sleep quality than watching TV, and also led to a “significant decline” in the boys’ ability to remember vocabulary words. The findings were published in the journal Pediatrics.

“Downtime is to the brain what sleep is to the body,” said Dr. Rich of Harvard Medical School. “But kids are in a constant mode of stimulation.”

Daniel Anderson, a professor of psychology at the University of Massachusetts at Amherst, says he believes that young, developing brains are becoming habituated to distraction and to switching tasks, not to focus. “If you’ve grown up processing multiple media, that’s exactly the mode you’re going to fall into when put in that environment — you develop a need for that stimulation,” he said.

Schools try hard to find the difficult balance between using technology for education and limiting distractions by technology.

Don Tapscott responded with a critical reflection to the NY times article: New technology has always been accused of negatively affecting young people, from television to videogames. Back in the late 1960s, the teenage Baby Boomer in the United States watched an average of over 22 hours of television each week. They were passive viewers. Current teenagers watch less television than their parents do, and they watch it differently: They are more likely to turn on the computer and simultaneously interact in several different windows, talk on the telephone, listen to music, do homework, read a magazine, and watch television - all at the same time. So we need to be careful before jumping to conclusions about the effects of digital immersion.

There is no evidence that this is causing a decline in face-to-face communication. Time spent online is not coming at the expense of less time hanging out with friends; it's less time watching passive television. There is evidence that current teenagers are efficient at multitasking and actively creating new media content (for example by creating videos, remixing music, writing blogs, etc.). Digital immersion and multi-tasking can be pushing the human brain beyond conventional capacity limitations by leading to better task-switching abilities and better active working memory. Young people are likely developing brains that are more appropriate for our fast paced, complex world.



What's needed is an entirely new model of pedagogy and educational modus operandi. To focus on the student, teachers have to step off the stage and start listening and conversing instead of just lecturing. In other words, they have to abandon their broadcast style and adopt an interactive one. Second, they should encourage students to discover for themselves, and learn a process of discovery and critical thinking instead of just memorizing the teacher's information. Third, they need to encourage students to collaborate among themselves and with others outside the school. Finally, they need to tailor the style of education to their students' individual learning styles.

Read full article here: NY Times: Growing Up Digital, Wired for Distraction
Read Don Tapscott's reply here

How Facebook affects Romance



According to a poll in Seventeen Magazine among 10,000 guys and girls ages 16 to 21, Facebook plays an important part in how teenagers make romantic connections.

Within one week of meeting a new person, 79 percent of people add the other person as a friend; and after adding a new friend, 60 percent of people stalk their crush's profile once a day (40 percent check in on their would-be soulmate several times a day).

Moreover, contrary to beliefs that social networking is erroding interpersonal communication, 72 percent of those surveyed said that talking to someone online brings you closer to them in-real-life.

Facebook is also used to end romantic relationships: 21% of respondents said they would break up with someone via changing their status message. Surprisingly, 73 percent of people keep their exes in the friends list. I'd like to see some stats on how many of those 73 percent stalk said ex after the breakup.

CNN: Boy Meets Girl: How Facebook functions in modern romace

Bacteria Turns Problem Solver


Researcher from Tokyo University used E.Coli bacteria to solve a 4x4 game of Sudoku. The key to the “solution” of the puzzle was in two aspects of E. coli: Recombinases, the enzymes used in genetic recombination such as when a damaged cell repairs DNA molecules and antisense RNA.

The system the researchers built involved each bacteria having one of four recombinases, corresponding to the digit (1 through 4) that the particular bacteria represented. Bacteria can “broadcast” their recombinases, so the other bacteria were set up so that as soon as they received three different digits from such broadcasts, they recognized that logically they must represent the remaining digit, and in turn began broadcasting that information themselves.

However, that process only discovers the digit and not the position. To get round this, the researchers assigned antisense RNA corresponding to the lines and mini-grids. The antisense RNA blocked each bacteria from receiving digit information from bacteria that didn’t belong in its vertical line, horizontal line or mini-grid.

To run the simulation, the bacteria that represented digits already filled in at the start of the puzzle were set to broadcast their digit straight away. That kicked off a chain reaction and the puzzle was soon resolved! (Post found on Geeks Are Sexy)




Bacteria Turns Problem Solver

Tigers Could Be Extinct In 12 Years If Unprotected



The World Wildlife Fund (WWF) say only about 3,200 tigers remain in the wild, a dramatic plunge from an estimated 100,000 a century ago. Experts are warning that if proper protective measures aren't taken, tigers may disappear by 2022!!
Tiger Extinction: Tigers Could Be Extinct In 12 Years If Unprotected

Saturday, November 20, 2010

What is the toughest animal on the planet?

Tardigrades (False Color Image)

Tardigrades, or water bears, are tiny invertebrates that are found pretty much everywhere, from freshwater to marine habitats, and from the lichens in your garden to the top of the highest mountains. They are among the world's hardiest creatures, thanks to their ability to curl up, switch off their metabolism and wait for conditions to improve. In fact, tardigrades hold the record for surviving several kinds of extreme environment, although it is debatable whether they should really count as they only set them when in their so-called "tun" state of extreme hibernation. (Text by Caroline Williams)
Tardigrades have survived:
  • Without water for 120 years
  • Freezing to -272.8 °C, very close to absolute zero
  • Heating to 151 °C
  • The vacuum of space. Samples lived for 10 days on board a European Space Agency experimental satellite in September 2007
  • Pressure six times as great as that felt at the bottom of the deepest ocean
  • Doses of X-ray and gamma radiation that are lethal to other life forms
Five different types of cryptobiosis have been identified in tardigrades: encystment (production of a dormant phase without significant water loss), anoxybiosis (resistance to low oxygen levels), cryobiosis (resistance to freezing temperatures), osmobiosis (resistance to elevated salinity) and anhydrobiosis (resistance to desiccation). Not all tardigrades share all five resistances - for instance, anhydrobiosis (the best-known form) is only found among terrestrial tardigrades - and different species will have different degrees of resistance. (Text by Christopher Taylor: More info on Tardigrades)


Compare the tardigrade's strategy to the rotifier's strategy: See blogpost here.

Extreme survival: The toughest beast in the world - environment - 19 November 2010 - New Scientist

Difference between Teacher, Educator, and Trainer

What is the difference between a teacher, an educator, and a trainer?


Some use the terms teacher and educator synonymously, while others claim that there is a difference.
It could be just a semantic difference (a euphemism): Because there are some negative associations with the term teacher, people started used the word educator instead, similar to "janitor" and "sanitation engineer".
However, the two terms could also refer to a difference in attitude of the individual: "Teacher" is a job description, while "educator" is a calling. A person can be an educator without being employed as a teacher, for example parents.


The distinction between teacher/educator and trainer is clearer.
A teacher helps people to get general education, which includes training. The intent of education is to enable the student to be able to integrate concepts across multiple disciplines and thus, to be able to conduct analyses and critical thinking. Education aims to induct the student to think what could be best way of doing a job with the available resources and constraints.
A trainer helps people to learn specific skills to perform a particular task. Training is the process of learing applied to a relatively narrow subject matter.Training aims to induct the trainee the best way of doing a job with the available resources and constraints (for example by following guidelines in a manual).


Education and training are both learning processes and both are important. The key distinction is the breadth and focus of the subject matter.

How Harry Potter Books affect the Real World


#1: After Harry Potter became an instant hit in 1997, real British schools took note of Rowling's fictional Hogwarts academy, specifically its division into four "houses": Gryffindor, Hufflepuff, Ravenclaw, and Slytherin. A survey by school-rewards company School Stickers found that 58 percent of U.K. schools now have Hogwarts-like "houses," and that 59 percent of those — some 8,000 schools — set them up after Harry Potter was published. A third of teachers believe that their school's houses have distinctive characteristics, but most are named after colors, not famous wizard alumni.

Real schools have taken a page from Hogwarts' "houses"

#2: Quidditch became a real sport, played at 400 colleges around the world - including NYU, Harvard, Oxford, Cambridge, and UC Berkeley. Players from 60 schools  will gather in New York on Nov. 13 and 14 2010 to compete in the Quidditch World Cup, and enthusiasts are lobbying for the NCAA to recognize the game as a college sport.
Quidditch -  a real sport?


#3: Hunting and selling owls has been illegal in India since 1972, but a new report from the country's environment ministry says a thriving black market is endangering wild populations of the birds. Many of the illegally traded animals are used for black magic and ceremonial rituals surrounding Diwali. The Harry Potter books might have created an additional demand for owls as urban middle class parents are presenting owls as pets to their children.
India's owl population in crisis