Studying the Perfect Fluid

A simulated collision of lead ions, courtesy the ALICE experiment at CERN

A simulated collision of lead ions, courtesy the ALICE experiment at CERN - See more at: http://newscenter.lbl.gov/2010/11/04/lhc-lead/#sthash.yxm9loVb.dpuf

Within five different approaches to parton propagation and energy loss in dense matter, a phenomenological study of experimental data on suppression of large-pT single inclusive hadrons in heavy-ion collisions at both the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC) was carried out. The evolution of bulk medium used in the study for parton propagation was given by 2 + 1 dimensional or 3 + 1 dimensional hydrodynamic models which are also constrained by experimental data on bulk hadron spectra. Values for the jet transport parameter qˆ at the center of the most central heavy-ion collisions are extracted or calculated within each model, with parameters for the medium properties that are constrained by experimental data on the hadron suppression factor  See: Extracting the jet transport coefficient from jet quenching in high-energy heavy-ion collisions

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See Also:

• JET Collaboration Wiki

LHChamber Music

LHChamber Music, CERN scientists perform musical compositions created using data sonification of LHC experimental results (Video: CERN)

See Also:

• CERN scientists perform their data

Lecture 1: The Theoretical Minimum

Published on Feb 16, 2012 (January 9, 2012) Leonard Susskind provides an introduction to quantum mechanics. See: Lecture 1: The Theoretical Minimum

Stellar flares seen from a nearby red dwarf star.

On April 23, NASA's Swift satellite detected the strongest, hottest, and longest-lasting sequence of stellar flares ever seen from a nearby red dwarf star. The initial blast from this record-setting series of explosions was as much as 10,000 times more powerful than the largest solar flare ever recorded. At its peak, the flare reached temperatures of 360 million degrees Fahrenheit (200 million Celsius), more than 12 times hotter than the center of the sun. The "superflare" came from one of the stars in a close binary system known as DG Canum Venaticorum, or DG CVn for short, located about 60 light-years away. Both stars are dim red dwarfs with masses and sizes about one-third of our sun's. They orbit each other at about three times Earth's average distance from the sun, which is too close for Swift to determine which star erupted. See: NASA | Swift Catches Mega Flares from a Mini Star

Problems with Your Blog Page?

I have notice black areas appearing on my blog page when accessing site through my laptop. I am wondering if this is a problem that I am just experiencing or if others Are having the same issue?

When will the Compass Point South?

If all the compasses in the world started pointing south rather than north, many people might think something very strange, very unusual, and possibly very dangerous was going on. Doomsayers would have a field day proclaiming the end is nigh, while more rational persons might head straight to scientists for an explanation.See:When Compasses Point South also Nova and Interactive

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Deep inside the Earth, the magnetic field arises as the fluid core oozes with hot currents of molten iron and this mechanical energy gets converted into electromagnetism. It is known as the geodynamo. In a car's generator, the same principle turns mechanical energy into electricity. No one knows precisely why the field periodically reverses, but scientists say the responsibility probably lies with changes in the turbulent flows of molten iron, which they envision as similar to the churning gases that make up the clouds of Jupiter. In theory, a reversal could have major effects because over the ages many aspects of nature and society have come to rely on the field's steadiness.See: Will Compasses Point South?-By WILLIAM J. BROAD Published: July 13, 2004-New York Times

Particles in Peace

This was in May of 2013.

Yaron Herman plays piano jazz that is utterly unique. He learned to play based on a method using math and philosophy.

Bijan Chemirani, French-born percussionist, was initiated into the art of Iranian percussion by his father, Djamchid Chemirani, at an early age and has acquired enormous experience in adapting his playing style to other genres of music.

Here they perform together for the first time at TEDxCERN.

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See Also:

• Performance of "Particles in Peace" Part 2: Yaron Herman & Bijan Chemirani at TEDxCERN

Latest Results of AMS

View of the AMS detector on the International Space Station (Image credit: NASA)

 (AMS) collaboration has today presented its latest results. These are based on the analysis of 41 billion particles detected with the space-based AMS detector aboard the International Space Station. The results, presented during a seminar at CERN, provide new insights into the nature of the mysterious excess of positrons (antielectrons) observed in the flux of cosmic rays. The findings are published today in the journal Physical Review Letters. See: New result from AMS experiment in Space|Cern

On Maui

Enjoying the Island of Maui

Ovation Aurora

The Space Weather Prediction Center and the Space Weather Prediction Testbed have introduced a new Auroral Forecast test product in an effort to improve services to current customers and expand our customer base with new products. The Auroral Forecast product is based on the OVATION Prime model which provides a 30-40 minute forecast on the location and probability of auroral displays for both the northern and southern polar regions. The development and implementation of this model has been a joint effort. The model itself was developed by P. Newell at the Johns Hopkins, Applied Physics Lab. Scientists at the NESDIS National Geophysical Data Center (NGDC) added further refinements to make the model run in real time. Researchers at the Space Weather Prediction Testbed validated the model and developed graphical displays. This model is driven by real-time solar wind and interplanetary magnetic field information from the Advanced Composition Explorer (ACE) satellite. The model is based on more than 11 years of data from the Defense Meteorlogical Satellite Program (DMSP) from which an empirical relationship between the solar wind conditions and the aurora location and intensity was developed. SEE: Ovation Aurora

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SOHO EIT 304 Latest Image

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