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| Food-For-Thought of 2009 | |||
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Food-For-Thought of 2009
Cuong Nguyen
Again, thank you so much for your generosity and kindness. Best Regards, Cuong Nguyen Cc: TuanVietnam/VNN Tiasang ******************************************************* PS: FYI Only. Reply from Prof. Koblitz From: "koblitzzzzz(a)xxxxxxxxxu.washington.edu" <koblitzzzzz(a)xxxxxxxxxu.washington.edu> To: "Cuong Nguyen" <phucuongzzzz(a)xxxxxxxxxpacbell.net> Cc: koblitzzzzz(a)xxxxxxxxxmath.washington.edu, koblitzzzzz(a)xxxxxxxxxasu.edu, minhhazzzz(a)xxxxxxxxxvnu.edu.vn, tuanvietnamzzzz(a)xxxxxxxxxvietnamnet.vn, tctiasangzzzz(a)xxxxxxxxxgmail.com Dear Cuong Nguyen, Thank you for your thoughtful comments about my article. I'd like to clarify what I meant in my recommendations #4,5. The purpose is not to meet some sort of socialist ideal (in fact, there are many programs in capitalist countries aimed at increasing the participation of women and ethnic minorities in science and technology), but rather to enable a country to make use of all its human resources. In many cases women and ethnic minorities are held back by social prejudices, not by lack of ability. For example, if a woman scientist has an opportunity to spend time abroad at a scientific center, many people will ask "Are you sure you want to spend so much time away from your family?", whereas they will not say that to a male scientist. At the secondary school level, some parents who are not wealthy will pay only for their son and not their daughter to receive special training for the university entrance examinations. And poor parents of ethnic minorities would be unable to pay for any of their children to receive such special training. These are only a few examples of the many ways that unfair disadvantages occur. The basic idea of recommendations #4,5 is that a country cannot reach its full potential in science and technology if more than half of the population (women and ethnic minorities) are not brought into the system of technical and scientific education in much greater numbers. One of the reasons why my wife and I started the Kovalevskaia Fund in 1985 (which initially worked only in Vietnam) was that we learned that in Hanoi at that time the Polytechnical University's students were only 8% female. I do not know the percent now, but I think that it is higher than 8% -- but nowhere near 50%. In connection with your second point, I agree entirely that malnutrition among children is a major cause of poor performance in school. This is true internationally, even in some of the industrialized countries. This question has been extensively studied in the United States, where there is a malnutrition problem, especially among certain population groups. There have been several studies that document exactly what you say, namely, that children in the United States who go to school hungry or improperly fed perform worse than children who are well nourished. This is the main reason that the U.S. government started a special program that subsidizes lunch in school for children of low income families. Does the Vietnamese government have any similar program? If it doesn't, then maybe one should be started. I also agree with you that proposals that might be reasonable in a wealthy country are not necessarily reasonable in the case of Vietnam. For example, I believe that Vietnam should not construct new universities, except possibly in cases when a foreign government is paying. The government of Vietnam should not spend its money (or borrow money from the World Bank) for that purpose, because it is more cost-effective to improve the existing universities than to build new ones. Thank you again for your message. Best regards, Neal Koblitz ************************************************************* September 25, 2009 LHC: The 8th Wonder of The World. Dear “ Wiki” Members, I wonder if you ever ignored voting for one of the most expensive construction and greatest building of the 21st century on earth: The LHC (Large Hadron Collider)? If so, I would strongly suggest that we should vote for LHC the Eighth Wonder of The World, considering the following facts and reasons:
Thank you for your consideration and your votes. Regards, Cuong Nguyen, P.E. ******************************* December 8, 2009 Dear Physicists, I’d like to take this opportunity to make a few comments on some scientific statements regarding experimental atom-smashing devices, conducted by our scientists in the past decades and recently at CERN on the Large Hadron Collider (LHC). According to the official information released from the CERN organization: “The operators then got the beams to run simultaneously in opposite directions through firehose-sized pipes 11,000 times a second around the ring, zooming by at nearly the speed of light through temperatures colder than outer space. Ultimately, the collider aims to create conditions like they were 1 trillionth to 2 trillionths of a second after the Big Bang —which scientists think marked the creation of the universe billions of years ago….” The above statements are inquired for its integrity and correctness by our understanding of the fundamental laws in Physics, as follows:
In summary, we have been impressed for so long by a few famous scientists that they could create a beam of protons that would run at nearly the speed of light. The above statement could be totally misleading, unless objectively verified and proven. . After all, if in deed, they could not get a beam of protons in the LHC to run at nearly the speed of light, then they should tell the truth, and nothing is better than the truth for the scientists to hold the same standard in scientific research as most of us do. Thank you very much for your reading My Best Regards, Cuong Nguyen, P.E. PS (1/20/2010): After I had sent out the inquiry, the Wikipedia online revised and inserted the following paragraph into its original version of “Particle Accelerators”. However, the (Wiki)’statement:” as the energy increases the particle speed approaches the speed of light as a limit, but never attains it” does not indicate clearly which particle the accelerator would be used! ****************************************************************** Sent to: physicszzzz(a)xxxxxxxxxaps.org; erbacherzzzz(a)xxxxxxxxxphysics.ucdavis.edu, bkeisterzzzz(a)xxxxxxxxxnsf.gov, aopperzzzz(a)xxxxxxxxxnsf.gov, expertszzzz(a)xxxxxxxxxsciam.com The Committee for Skeptical Inquiry (CSI- ) - infozzzz(a)xxxxxxxxxcsicop.org bradfordzzzz(a)xxxxxxxxxcenterforinquiry.net, kendrickfrazierzzzz(a)xxxxxxxxxcomcast.net ********************************************************************** (http://en.wikipedia.org/wiki/Particle_accelerator) …………………………… Since the special theory of relativity requires that matter always travels slower than the speed of light in a vacuum, in high-energy accelerators, as the energy increases the particle speed approaches the speed of light as a limit, but never attains it. Therefore particle physicists do not generally think in terms of speed, but rather in terms of a particle's energy or momentum, usually measured in electron volts (eV). An important principle for circular accelerators, and particle beams in general, is that the curvature of the particle trajectory is proportional to the particle charge and to the magnetic field, but inversely proportional to the (typically relativistic) momentum. ………………………… Cyclotrons reach an energy limit because of relativistic effects whereby the particles effectively become more massive, so that their cyclotron frequency drops out of synch with the accelerating RF. Therefore simple cyclotrons can accelerate protons only to an energy of around 15 million electron volts (15 MeV, corresponding to a speed of roughly 10% of c), because the protons get out of phase with the driving electric field. If accelerated further, the beam would continue to spiral outward to a larger radius but the particles would no longer gain enough speed to complete the larger circle in step with the accelerating RF. Cyclotrons are nevertheless still useful for lower energy applications. ………………………………………………………………… - Ngườihiệuđính: Cuong Nguyen vào ngày Feb.13.2010, 11:29 am ----------------------------- | ||||||||||||||||
 Feb.13.2010 11:25 am
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