Challenging the Limits of Learning
TAU measures the human mind against the yardstick of a machine
Although we’re convinced that baby is brilliant when she mutters her first words, cognitive scientists have been conducting a decades-long debate about whether or not human beings actually “learn” language.
Most theoretical linguists, including the noted researcher Noam Chomsky, argue that people have little more than a “language organ” — an inherent capacity for language that’s activated during early childhood. On the other hand, researchers like Dr. Roni Katzir of Tel Aviv University‘s Department of Linguistics insist that what humans can actually learn is still an open question — and he has built a computer program to try and find an answer.
“I have built a computer program that learns basic grammar using only the bare minimum of cognitive machinery — the bare minimum that children might have — to test the hypothesis that language can indeed be learned,” says Dr. Katzir, a graduate of the Massachusetts Institute of Technology (where he took classes taught by Chomsky) and a former faculty member at Cornell University. His early results suggest that the process of language acquisition might be much more active than the majority of linguists have assumed up until now.
Dr. Katzir’s work was recently presented at a Cornell University workshop, where researchers from fields in linguistics, psychology, and computer science gathered to discuss learning processes.
A math model in mind
Able to learn basic grammar, the computer program relies on no preconceived assumptions about language or how it might be learned. Still in its early stages of development, the program helps Dr. Katzir explore the limits of learning — what kinds of information can a complex cognitive system like the human mind acquire and then store at the unconscious level? Do people “learn” language, and if so, can a computer be made to learn the same way?
Using a type of machine learning known as “unsupervised learning,” Dr. Katzir has programmed his computer to “learn” simple grammar on its own. The program sees raw data and conducts a random search to find the best way to characterize what it sees.
The computer looks for the simplest description of the data using a criterion known as Minimum Description Length. “The process of human learning is similar to the way computers compress files: it searches for recognizable patterns in the data. Let’s say, for instance, that you want to describe a string of 1,000 letters. You can be very naïve and list all the letters in order, or you can start to notice patterns — maybe every other character is a vowel — and use that information to give a more compact description. Once you understand something better, you can describe it more efficiently,” he says.
Artificial intelligence for answering machines
His early results point to the conclusion that the computer, modeling the human mind, is indeed able to “learn” — that language acquisition need not be limited to choosing from a finite series of possibilities.
While it’s primarily theoretical, Dr. Katzir’s research may have applications in technologies such as voice dialogue systems: a computer that, on its own, can better understand what callers are looking for. A more advanced version of Dr. Katzir’s program might learn natural language grammar and be able to process data received in a realistic setting, reflecting the manner in which humans actually talk.
The results of the research might also be applied to study how we learn to “read” visual images, and may be able to teach a robot how to reconstruct a three-dimensional space from a two-dimensional image and describe what it sees. Dr. Katzir plans to pursue this line of research with engineering colleagues at Tel Aviv University and abroad.
“Many linguists today assume that there are severe limits on what is learnable,” Dr. Katzir says. “I take a much more optimistic view about those limitations and the capacity of humans to learn.”
Reference Link
http://www.aftau.org/site/News2?page=NewsArticle&id=13753
Mathematics simplified in beads
By Karthik Madhavan
Coimbatore, India.
Abacus can help visually challenged master the subject |
Use of abacus has helped in bringing
mathematics in to focus
‘ICEVI is ready to provide training in abacus
to anybody who is interested’
— Photo: S. Siva Saravanan
Maths made easy: Abacus can be used to solve multiple problems.
COIMBATORE: Conquering numbers is no joke. The numerophobics will vouch for it. And so will the visually challenged.
Be it learning addition, subtraction or any other basic operation, the visually challenged have always found the going tough. For, mathematics is not a subject that can be memorised and written.
It is not true, counters M.N.G. Mani, Secretary General, International Council for Education of People with Visual Impairment (ICEVI). The visually challenged can easily learn and master the subject by making use of abacus and Taylor Frame.
“Abacus is an excellent tool to learn mathematics because it helps in more ways than one,” says Mr. Mani, who has not only taught mathematics but also authored a book on how to teach the subject to visually challenged students.
“Abacus is tactile in nature, contributes to the development of mental arithmetic, increases speed, has a reference point, to which one can return in case of error in solving a problem and can be used to solve multiple problems.”
He says the use of the abacus has helped in bringing mathematics in to focus, for, for long teachers neglected the subject.
Special education
“Until integrated education was introduced in the 1980s in schools, special education teachers were not taking mathematics and abacus seriously because they, perhaps, believed that the subject cannot be taught to the students,” Mr. Mani says.
R. Srinivasan, a visually challenged retired professor of English, recalls that he was not taught abacus during his school days.
One of the reasons for teachers feeling so was that they had not mastered abacus and did not know how to teach mathematics using abacus, Mr. Mani says.
To solve the problem the Rehabilitation Council of India amended the special education teacher training syllabus.
It introduced abacus in the syllabus and ensured that those who passed out with a special education certificate had the knowledge to use abacus.
Today, special education courses have at least 12 hours dedicated to methodology of teaching mathematics to visually challenged students.
Once the teachers learnt to use abacus they were able to impart the skill to the students, says Mr. Mani.
“It is good that the teachers to-be are learning abacus but they should not learn it in theory but in practice as a skill development programme.”
Enquiries with special education teachers, however, reveal that it is not taken seriously and that only a few institutes are keen on teaching the use of abacus to the teachers to-be.
Mr. Mani says the ICEVI is ready to provide training in abacus to anybody who is interested.
Reference Link : http://www.hindu.com/2011/01/20/stories/2011012051020200.htm
Courtesy : The Hindu
IIT-M to aid research on innovative projects
IIT-Madras will soon have an inter-disciplinary ‘Centre of Excellence’ that will showcase and facilitate research on innovative projects in embedded systems, VLSI (Very Large Scale Integration) design and enabling technologies by fostering partnership with various industrial players, Kamakoti Veezhinathan, Professor, Department of Computer Science and Engineering, IIT-Madras, said here on Tuesday.
He was speaking at the inaugural session of the 24th international conference on VLSI Design that, along with the 10th international conference on Embedded Systems, seeks to facilitate discussions on designing embedded solutions for emerging markets in infrastructure, energy and automotives. Over 100 researchers, designers and industry experts will present their views on various aspects of electronic design automation and embedded systems that underpin the semiconductor industry. The three-day conference will also witness discussions on the challenges faced by India’s growing VLSI sector. VLSI is demand-driven, and it is necessary to draw the attention of young engineers to opportunities in this area, said Professor Kamakoti, who is co-chairing the conference. “Instead of training students of engineering to be ‘industry-ready,’ engineering colleges should equip them with the fundamentals of design and engineering, that would help them understand processes better,” he said.
The shortage of skilled faculty in the specialised fields including circuit design and VLSI is a serious concern, he added.
The conference will include technical paper sessions on latest research and embedded tutorials, industry presentation sessions, panel discussions, design contests and industrial exhibits.
While discussions and deliberations will focus on technology, manufacturing, markets, applications, finance and policies, the workshop on Reliability Aware System Design and Test (RASDAT) on Thursday and Friday will delve into the issues of data compression techniques, reliable computing, VLSI circuits and partitioning algorithms.
Stanford University professor Thomas H Lee said that the best is yet to come in ‘Embedded revolution.’ “The increasing pervasiveness of microprocessors in all walks of life including communications, consumer care, industry, defence and health care shows that they are very much in the fabric of our existence, but just invisible,” he said.
Reference Link
http://www.thehindu.com/news/cities/Chennai/article1033172.ece
Courtesy
The Hindu
The power of ‘convergence’ In white paper, MIT scientists discuss potential for revolutionary advances in biomedicine and other fields.
A new model for scientific research known as “convergence” offers the potential for revolutionary advances in biomedicine and other areas of science, according to a white paper issued today by 12 leading MIT researchers. The white paper, presented Tuesday morning at a forum hosted by the American Association for the Advancement of Science (AAAS), says that the United States should capitalize on the trend of convergence — which involves the merger of life, physical and engineering sciences — to foster the innovation necessary to meet the growing demand for accessible, affordable health care.
“Convergence is a broad rethinking of how all scientific research can be conducted, so that we capitalize on a range of knowledge bases, from microbiology to computer science to engineering design,” MIT Institute Professor and Nobel Laureate Phillip Sharp, one of the report’s authors, told the AAAS forum.
“It entails collaboration among research groups but, more deeply, the integration of disciplinary approaches that were originally viewed as separate and distinct. This merging of technologies, processes and devices into a unified whole will create new pathways and opportunities for scientific and technological advancement.”
Sharp and the other MIT authors say that convergence offers the potential for a “Third Revolution” in biomedicine that may be as profound as the two life-science revolutions that preceded it: the breakthroughs accompanying the development of molecular and cellular biology, and the sequencing of the human genome, which has made it possible to identify the genetic foundations of many diseases.
Convergence also provides a blueprint for addressing the country’s future medical and healthcare challenges, which will only increase as the population ages and diseases such as Alzheimer’s become more prevalent. However, federal investment in biomedical research is critical — “and a smart investment if we are to keep our biomedical research the finest in the world,” said Sharp. As an example, he cited NIH investments in heart-disease research, which average $4 per year per American and have helped to cut the incidence of fatal heart attacks and stroke by more than 60 percent since 1975.
A new model
The report, “The Third Revolution: The Convergence of the Life Sciences, Physical Sciences and Engineering,” noted the impact that convergence is already having in a broad array of fields.
Just as advances in information technology, materials, imaging, nanotechnology and related fields — coupled with advances in computing, modeling and simulation — have transformed the physical sciences, so are they are beginning to transform life science. The result is critical new biology-related fields, such as bioengineering, computational biology, synthetic biology and tissue engineering.
At the same time, biological models (understanding complex, self-arranged systems) are already transforming engineering and the physical sciences, making possible advances in biofuels, food supply, viral self assembly and much more.
The report gives particular focus to biomedicine, a field that is already being transformed by convergence. At MIT, for example, scientists are using nanoparticles to transport time-release anticancer drugs directly to cancerous cells, developing drugs that fight diseases without damaging healthy tissues and cells, and improving new predictive models of disease.
Recommendations
The report says providing adequate financial support and a well-organized focus within NIH for convergence research are key to the success of the convergence model, as is encouraging investigation that crosses existing research boundaries. Among the report’s other recommendations are establishing a convergence “ecosystem,” which would build connections across funding agencies; reforming the peer-review process to support interdisciplinary grants; and educating, expanding and supporting the next generation of convergence researchers.
Other MIT speakers at the forum included Robert Langer, the David H. Koch Institute Professor at MIT and a winner of the Millennium Technology Prize and the National Medal of Science; Paula Hammond, the Bayer Professor of Chemical Engineering; and Tyler Jacks, director of the David H. Koch Institute for Integrative Cancer Research at MIT and the David H. Koch Professor of Biology.
Commentators at the forum included Commissioner Margaret A. Hamburg of the Food and Drug Administration; Thomas Kalil, deputy director for policy in the White House Office of Science and Technology Policy; Dr. Alan Guttmacher, director of the National institute of Child Health and Human Development at NIH; and Dr. Keith Yamamoto, professor and executive vice dean, University of California-San Francisco School of Medicine, and chair of the Coalition for Life Sciences.
Reference Link
http://web.mit.edu/newsoffice/2011/convergence-0104.html
Courtesy
HT Media
India unveils Rs 1,500 tablet PC
New Delhi: India unveiled a Rs 1,500 (around $ 30) tablet PC designed specifically for students.
“If more companies decide to manufacture a similar device, prices will come down automatically,” Human Resource Development Minister Kapil Sibal said after unveiling the low cost-access-cum computing device here.
The device would be made available to students in 2011.
When the ministry floated the concept of a low cost laptop some years ago, officials said it would cost Rs 500 ($ 10). It will now cost about three times the initial projections.
The ministry expects the prices to drop to Rs 1,000 ($ 20) and reach Rs 500 ($ 10) as innovations are introduced.
The device, no bigger than a conventional laptop, is a single unit system with a touch screen and a built in keyboard along with 2GB RAM, Wi-Fi connectivity, USB port and powered by a 2-watt system to suit poor power supply areas.
“This is real and tangible and we will take it forward. Sun will rise for the Indian students in 2011,” he said.
The ministry also invited private players to produce similar low cost computers.
“When we started the project, the response from the private sector was lukewarm. Now many are willing to join the innovation,” Sibal said.
The ministry started its efforts by holding discussions on this concept with a group of experts at the Indian Institute of Science, Bangalore, IIT Kanpur, IIT Kharagpur, IIT Madras and IIT Bombay, a ministry official said.
The low cost tablets will be distributed in institutions by the HRD ministry. The final price will depend on the transportation cost.
“We will give some subsidy on the device. As far as transport is concerned, if the transport cost in less, the government can bear that as well,” Sibal added.
Reference Link
http://ibnlive.in.com/news/india-unveils-rs-1500-tablet-pc/127289-11.html?from=tn
Courtesy
IBNLive.com India
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