Friday, 18th April 2014

A few atoms thick, a film remains superconducting cuprate

Posted on 23. Nov, 2009 by in Physical, Physics

raketa2_1A little more brick in the building work on superconductors at high critical temperatures has been made by researchers at the Brookhaven National Laboratory. They showed that the phenomenon could exist in a cuprate thick few atoms only. In 1986, the discovery that compounds based on copper oxide and forming a kind of ceramic superconductors could become, not below a few Kelvin, but several dozen, had raised many hopes. If we could reproduce the phenomenon at temperature ambient, or at least a few tens of degrees below the freezing point of the water, our technology would be radically changed. (more…)

LHC: re-collisions in the CMS detector

Posted on 22. Nov, 2009 by in Physical, Physics

b911d2bcaf3They have not done since September 2008 … Gusts of particles produced by collisions of a beam of protons on a sheet of metal at the entrance of the giant CMS detector have been observed this Saturday, November 7, 2009.
There are more than a year, on September 10, 2008, the first proton beams circulating in the LHC. Collisions should have intervened a few weeks after “first beam day” but the failure of connections between magnets and superconducting dipole leak of helium resulting net halted preparations.Nevertheless, the passing of packets of protons in the Atlas detector and Compact Muon Solenoid, that is to say, CMS, was still accompanied by the production of some events, as they say in the jargon of physicists particles. Indeed, devices collimation of beams at the entrance of the detectors (metal plates) had their nuclei bombarded by some of the proton beams and some reactions occurred.  (more…)

The Nobel Prize in Physics Vitaly Ginzburg died

Posted on 22. Nov, 2009 by in Physical, Physics

b911d2bcaf2The Nobel Prize in Physics Vitaly Ginzburg died this Sunday, November 8, 2009. Even if it was one of the creators of the Russian H-bomb, it is mainly his work in the field of superconductivity and superfluids, which made him famous.This is one of the greatest physicists of the twentieth century Russian who has just left us at age 93. Born October 4, 1916, Vitaly Ginzburg did not seem destined to one day win the Nobel Prize in physics. Although his father was an engineer and his mother’s doctor, the troubled period of the early twentieth century Russia does not permit him to receive a good education. Thus, it has been in school at the age of 11 years without ever really caught his delay. As he explains in his autobiography on the site of the Nobel Foundation, his mastery of mathematics as well as letters was never very good … compared to that of his colleagues obviously.  (more…)

Sequester CO2 and boost geothermal energy both

Posted on 22. Nov, 2009 by in Physical, Physics

b911d2bcaf1Recycled to tap geothermal energy, the carbon dioxide emittegn=”left”d by power plants generating energy could finding a second youth. Part of this gas could also be sequestered in the basement, and then extracted from the atmosphere.Of carbon flowing through miles of underground could efficiently extract heat from the depths of the earth and bring to the surface to produce electricity. Incidentally, stocks of CO 2 could probably be trapped in the basement. According to the scientist Miroslav Petro, project director Symyx, the concept is doubly appealing: “you sequester CO 2 and at the same time you draw energy.  (more…)

A super microscope: Sparc

Posted on 30. Jul, 2009 by in News, Physics

as
Laser and Particle Beams is an international journal which deals with basic physics issues of intense laser and particle beams, and the interaction of these beams with matter. Research on pulse power technology associated with beam generation is also of strong interest. Subjects covered include the physics of high energy densities; non-LTE phenomena; hot dense matter and related atomic, (more…)

BEAM THERAPY OF CANCER

Posted on 30. Jul, 2009 by in News, Physics

wilson_thHadrontherapy is a fast growing activity. Nowadays, there are dozens of centres and half a dozen commercial suppliers. At the Workshop, physicians will present the experience in treating various tumours and discuss the characteristics needed for effective therapy both with X–rays and with hadrons. Various
approaches to hadrontherapy will be discussed. These consist of cyclotrons, cyclotrons followed by linacs, synchrotrons, and various novel methods. (more…)

Traces of history of science

Posted on 30. Jul, 2009 by in News, Physics

The
world around us and the entire Universe is populated by a great diversity of materials and forms of matter,

but surprisingly, this great variety of matter is composed of relatively few and simple basic bricks.

The key word and / or primary will be a key word throughout our journey of exploration of the infinitely small.
Mean fundamental building blocks for objects without an internal structure, or objects which in turn can not be broken down into smaller entities.

The idea of the existence of these fundamental entities dates back to the time of ancient Greece, the Greek philosophers Leucippus and Democritus in the fifth century BC. They believed that the universe all matter was made of very small indivisible bricks (which they called atoms, which in greek means precisely “not divisible”) separated by a vacuum.

Aristotle, however, argued that “nature abhors a vacuum” and thought that matter was indefinitely divisible into parts always smaller. The opinion of Aristotle prevailed, and the hypothesis dell’atomo was almost completely forgotten for
more than two thousand years.

(more…)

Physics Guide

Posted on 24. Jun, 2009 by in Educational Resources, Physics, Popular Science

physicsf89High School Physics

  • 101 Physics Facts by J. Davidson
  • Physics Classroom: Tutorials by T. Henderson
  • Regents Physics Exam ReviewCollege Physics
  • Physics Central – American Physical Society
  • Physics – Wikipedia
  • World of Physics by E. WeissteinMore Fun Physics Stuff
  • Amusement Park Physics – Annenberg
  • Electricity Virtual Museum – IEEE
  • Multimedia Physics Studio by T. Henderson
  • Physics Animations by D. HarrisonPhysics Reference Tools
  • Fundamental Physical Constants
  • Units Conversion Calculator
  • A new place for fusion lasers and plasmas

    Posted on 22. Jun, 2009 by in Glossary, Nanotechnology, Physics

    The new Institute Lasers and Plasmas (ILP) was inaugurated by Alain Rousset.
    Located in Barp (Gironde), this brand new building with an area of 1 500 m² welcomes researchers who participate in experiments conducted on civilian channels lasers Studies Center atomic / Center of scientific and technical studies of Aquitaine ( CEA / Cesta).

    On the amount of 2.9 million, the building was financed to the tune of:

    1 450 000 by the Regional Council of Aquitaine;
    1 015 000 euros of European Development Fund (ERDF);
    435 000 of the University of Bordeaux 1.
    (more…)

    John Dalton (6.9.1766 – 27.7.1844) – English chemist and physicist

    Posted on 22. Jun, 2009 by in Educational Resources, Glossary, Physics

    John Dalton (6.9.1766 – 27.7.1844) – English chemist and physicist, member of the Royal Society of London (1822). Born in Iglsfilde (Kumberlend). Education has received its own. In the years 1781-1793 – a teacher of mathematics at a school in Kendal, in 1793 a professor of physics and mathematics at New College in Manchester.

    Basic research to include the years 1800-1803 in physics, later – in chemistry. Wire (from 1787), meteorological observations, investigated the color of the sky, the nature of heat, refraction and reflection of light. As a result, created a theory of evaporation and mixing of gases. Described (1794) Visually Impaired, which is called achromatic. (more…)

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