Nonsense to say modern science existed in ancient Greece or India


Nonsense to say modern science existed in ancient Greece or India: Steven Weinberg



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Nobel-winning physicist Steven Weinberg is often called one of the most influential living scientists in the world. Besides his seminal work on particle physics and several other books on science, the 82-year-old American has just come out with an account of the birth of modern science titled 'To Explain the World'. He talks to Subodh Varma about the tension that exists between religious belief and science:

Many people believe that much of modern science already exists in ancient texts or teachings of their respective religions. In India, for example, the Hindu rightwing claims that many scientific and technological achievements of modern times like the aircraft, nuclear bombs, plastic surgery, etc were discovered 3,000 to 10,000 years ago. Is that possible?

It is nonsense to suppose that modern scientific and technological knowledge was already in the hands of people thousands of years ago. Though much has been lost, we have enough ancient texts from Greece, Babylon, India, etc to show not only that early philosophers did not know these things, but that they had no opportunity to learn them.

What is the difference in the 'science' of ancient times and modern times?

We have learned to keep questioning past ideas, formulate general principles on the basis of observation and experiment, and then to test these principles by further observation and experiment. In this way, modern physical science (and to an increasing extent, biological science as well) has been able to find mathematical laws of great generality and predictive power. Our predecessors in the ancient and medieval world often believed that scientific knowledge could be obtained by pure reason, and where they understood the importance of observation, it was passive, not the active manipulation of nature that is characteristic of modern experiment.

Further, their theories of the physical world were often muddled with human values or religious belief, which have been expunged from modern physical science.

Why did modern science arise in the 17th century? Why not earlier or later?

It is impossible to say why the scientific revolution occurred precisely when and where it did. Still, we can point to several developments in former centuries that prepared the ground for the scientific revolution.

One was the Renaissance of the 15th and 16th centuries, which led to an increased concern with the real world and a turning away from scholastic theology. Another was the invention of printing with moveable type, which made it possible for the books of scientists such as Copernicus and Galileo to circulate rapidly throughout Europe.

Looking further back, we can point to the growth of universities from the 13th century onward. Although these grew out of schools associated with Christian cathedrals, they became havens for secular scientific research, for Buridan and Oresme at Paris, for Galileo at Padua and Pisa, and for Newton at Cambridge.

Despite stupendous advances in science, its acceptance still seems to be limited in society. In fact, you have publicly taken on antiscience lobbyists like climate change deniers or anti-evolutionists...

There are few people today who will deny the value of science, but there are many who are terribly confused about the content of scientific knowledge. They doubt the conclusions of geophysicists regarding global warming, and they think that it is still an open question whether evolution through natural selection is responsible for the origin of species. It is good to keep an open mind, even about the conclusions of experts, but there comes a point at which issues become settled. It is silly to keep an open mind about whether the Earth is flat.

Does a person have to abandon religion in order to become a scientist?

Certainly not. There are fine scientists (though not many) who are quite religious. But there is a tension between science and religious belief. It is not just that scientific discoveries contradict some religious beliefs. More importantly, when one experiences the care and open-mindedness with which scientists seek truth, one may lose some respect for the pretensions of religion to certain knowledge.

You have earlier written about the 'beauty' of science. What does that mean?

By seeking scientific knowledge over many centuries, we have developed a sense of the sort of scientific principle that is likely to describe nature, and we have come to think of such principles as beautiful, in the same way that a designer of sailboats develops a sense of the sort of design that will sail well, and comes to think of such sailboats as beautiful. There is no simple prescription for the beauty of a scientific theory, but it surely includes rigidity, the property that the details of the theory cannot easily be altered without destroying the consistency of the theory.


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some so called educated talks like fools


















device from MIT converts text to audio for visually impaired

New finger-mounted device from MIT converts text to audio for visually impaired

Washington: MIT researchers have developed a finger-worn device with a built-in camera that converts written text into audio for the visually impaired. The device provides feedback - either tactile or audible - that guides the user's finger along a line of text, and the system generates the corresponding audio in real time.
Roy Shilkrot, a Massachusetts Institute of Technology graduate student in media arts and sciences and colleagues tested several variations of their device in a study with vision-impaired volunteers.
One included two haptic motors, one on top of the finger and the other beneath it. The vibration of the motors indicated whether the subject should raise or lower the tracking finger.
Another version, without the motors, instead used audio feedback: a musical tone that increased in volume if the user's finger began to drift away from the line of text. The researchers also tested the motors and musical tone in conjunction.

There was no consensus among the subjects, however, on which types of feedback were most useful. Researchers are now concentrating on audio feedback, since it allows for a smaller, lighter-weight sensor. The key to the system's performance is an algorithm for processing the camera's video feed, which Shilkrot and his colleagues developed.
Each time the user positions his or her finger at the start of a new line, the algorithm makes a host of guesses about the baseline of the letters. Since most lines of text include letters whose bottoms descend below the baseline, and because skewed orientations of the finger can cause the system to confuse nearby lines, those guesses will differ.
But most of them tend to cluster together, and the algorithm selects the median value of the densest cluster. That value, in turn, constrains the guesses that the system makes with each new frame of video, as the user's finger moves to the right, which reduces the algorithm's computational burden.
In the study, the algorithms were executed on a laptop connected to the finger-mounted devices.
In ongoing work, Marcel Polanco, a master's student in computer science and engineering, and Michael Chang, an undergraduate computer science major participating in the project through MIT's Undergraduate Research Opportunities Programme, are developing a version of the software that runs on an Android phone, to make the system more portable.