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Oct. 15, 2011
Volume: II
Number: 40
 
National Society of Black Physicists    African Physical Society    South African Institute of Physics   African Astronomical Society   
 
 
Could deuteron experiments explain matter-antimatter imbalance?
SpaceDaily.com    Share    Share on FacebookTwitterShare on LinkedinE-mail article
University of Arizona theoretical physicist Bira van Kolck recently proposed in Physical Review Letters that experiments with deuterons could lead to an explanation for one of the most daunting puzzles physicists face: the imbalance of matter and antimatter in the universe. Like the electric dipole, the magnetic quadrupole violates time-reversal symmetry. Thus the magnetic quadrupole moment of the deuteron could reveal sources of a phenomenon known as time reversal violation. By calculating the electric-dipole and magnetic-quadrupole form factors of the deuteron, van Kolck shows that the relative sizes of the corresponding moments allow an identification of the symmetry-breaking source. More

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NSBP member Nadya Mason wins 2012 Maria Goeppert Mayer Award
American Physical Society    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Nadya Mason, a professor in the physics department and the Frederick Seitz Materials Research Laboratory at the University of Illinois-Urbana Champaign has won the 2012 Maria Goeppert Mayer Award. The award recognizes outstanding achievement by a woman physicist in the early years of her career. Dr. Mason was cited for "...innovative experiments that elucidate the electronic interactions and correlations in low-dimensional systems, in particular the use of local gates and tunnel probes to control and measure the electronic states in carbon nanotubes and graphene." Earlier this year her research group documented one of the first observations of Andreev bound states by using voltage-biased superconducting contacts to sandwich a quantum dot and graphene layer. More

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Astrophysicists find evidence of black holes' destruction of stars
Eureka Alert    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A team of astrophysicists from the U.S., Spain and South Africa have found evidence of black holes destroying stars, a long-sought phenomenon that provides a new window into general relativity. The research, reported in the latest issue of the Astrophysical Journal, also opens up a method to search for the possible existence of a large population of presently undetectable "intermediate mass" black holes, which are hypothesized to be precursors to the super-massive black holes at the centers of most large galaxies. More

Astronomers find bounty of failed stars: 1 youngster only 6 times heftier than Jupiter
University of Toronto    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A University of Toronto-led team of astronomers has discovered over two dozen new free-floating brown dwarfs, including a lightweight youngster only about six times heftier than Jupiter, that reside in two young star clusters. What's more, one cluster contains a surprising surplus of them, harboring half as many of these astronomical oddballs as normal stars. Sometimes described as failed stars, brown dwarfs straddle the boundary between stars and planets. More



What triggers a volcano into a 'super-eruption'?
University of Oregon    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The "super-eruption" of a major volcanic system occurs about every 100,000 years and is considered one of the most catastrophic natural events on Earth, yet scientists have long been unsure about what triggers these violent explosions. However, a new model presented by researchers at Oregon State University points to a combination of temperature influence and the geometrical configuration of the magma chamber as a potential cause for these super-eruptions. The creation of a ductile halo of rock around the magma chamber allows the pressure to build over tens of thousands of years, resulting in extensive uplifting in the roof above the magma chamber. Eventually, faults from above trigger a collapse of the caldera and subsequent eruption. More

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Is hydrogen storage possible in metal-doped graphite 2-D systems in conditions found on Earth?
American Physical Society    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A key challenge for hydrogen-based energy systems is to find a lightweight material to store and extract hydrogen efficiently. Carbon-based compounds such as nanotubes and graphene decorated with metallic atoms have been proposed as storage candidates. However, as shown in Physical Review Letters by Agustin Sigal and colleagues from the National University of Córdoba, Argentina, using first-principle calculations, oxygen interferes with hydrogen adsorption, even at ultrahigh vacuum level partial pressures, by blocking the sites where it could take place and by irreversibly oxidizing the metallic sites. More



Atomic gyroscope measures Earth's rotation and may be able to test geodetic precession
Physics World    Share    Share on FacebookTwitterShare on LinkedinE-mail article
An atomic gyroscope described in Physical Review Letters can determine the latitude where the instrument is located — and also measure true north and the Earth's rate of rotation. It works by firing a cloud of atoms upwards at a slight angle to the vertical so that the atoms follow a parabolic trajectory as gravity pulls them down. A series of laser pulses is then fired at the cloud while in flight, which separates the atoms into a number of different bunches that follow different trajectories. If the bunches are carefully selected so that two of these trajectories cross paths at a detector, the wave nature of the atomic trajectories produces interference patterns that depend in part upon the relative orientations of the laser pulses, gravity and the rotation of the Earth. More

New twist on Brownian motion seen for the 1st time
Physics World    Share    Share on FacebookTwitterShare on LinkedinE-mail article
In 1905 Einstein famously described Brownian motion of a small particle immersed in a fluid in terms of random "kicks" given to the particle by uncorrelated motions of a surrounding fluid. But after 50 years, physicists came to realize that the particle and fluid motions can become correlated if the densities of the two are similar. Long predicted, this result was only recently observed for the first time by trapping a single micrometre-sized melamine sphere in optical tweezers created by a tightly focused laser beam. More



New theories emerge to disprove OPERA faster-than-light neutrinos claim
PhysOrg.com    Share    Share on FacebookTwitterShare on LinkedinE-mail
article
Since the Oscillation Project with Emulsion-tRacking Apparatus team released its announcement claiming that they have been measuring muon neutrinos moving faster than the speed of light, over 30 papers have been published seeking ways to discredit the findings. Thus far though, only two seem credible. The first is by Carlo Contaldi of Imperial College London. He says that it's likely the OPERA team failed to take gravity into their math equations and its effect on the clocks used to time the experiment. The second is by Andrew Cohen and Sheldon Glashow, who together point out that if the neutrinos in the study were in fact traveling as fast as claimed, they should have been radiating particles as they went, leaving behind a measurable trail. And since the OPERA team didn't observe any such trail (or at least didn't report it) it follows that the neutrinos weren't in fact traveling as fast as were claimed. More

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A new look at old Hubble data builds vital track histories of orbits in exoplanet system
NASA    Share    Share on FacebookTwitterShare on LinkedinE-mail article
In a painstaking re-analysis of Hubble Space Telescope images from 1998, and combing that with observations made in 2007 and 2008, astronomers have found visual evidence for two extrasolar planets that originally went undetected in 1998. Finding these hidden gems in the Hubble archive gives astronomers an invaluable time machine for comparing much earlier planet orbital motion data to more recent observations. It also demonstrates a novel approach for planet hunting in archival Hubble data. Astronomers now have direct snap shots of the four known planets orbiting the young, massive star HR 8799. This first demonstrated the power of a new data-processing technique for retrieving faint planets buried in the glow of the central star, and also the power of the Hubble Space Telescope data archive, which harbors images and spectral information from over 20 years of Hubble observations. More

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NASA readies new type of Earth-observing satellite for launch
PhysOrg.com    Share    Share on FacebookTwitterShare on LinkedinE-mail
article
NASA is planning an Oct. 27 launch of the first Earth-observing satellite to measure both global climate changes and key weather variables. The National Polar-orbiting Operational Environmental Satellite System Preparatory Project is the first mission designed to collect critical data to improve weather forecasts in the short-term and increase our understanding of long-term climate change. It will carry five key instruments: the Advanced Technology Microwave Sounder, the Cross-track Infrared Sounder, the Ozone Mapping and Profiler Suite, the Visible Infrared Imaging Radiometer Suite, and Clouds and the Earth's Radiant Energy System. NPP will bridge NASA Earth observation satellites and NOAA's Joint Polar Satellite System, which was dealt a severe budgetary blow last year. More





National Society of Black Physicists jobs board postings
NSBP    Share    Share on FacebookTwitterShare on LinkedinE-mail article
APS webinar: Interviewing without the Angst: 3-4 p.m. EDT Oct. 19
Tenure Track Faculty
Assistant/Associate Professor
Assistant Professor of Physics
IBM Research Internship for Undergraduate Women
Assistant Professor of Physics and Astronomy (Astrophysics)
Tenure-Track Faculty in Theoretical Condensed Matter Physics
Assistant Professor
Assistant Professor of Physics
Tenure Track Faculty position in Experimental Particle Physics
Assistant Professor in Astrophysics
Tenure Track Position - Biophysics or Nanoscience
Postdoctoral Research Positions, LIGO Laboratory
Postdoctoral Research Associate
Assistant Professor, Physics Department at MIT
Assistant Professor of Physics
Neukom Fellow
Assistant Professor of Physics & Astronomy
Tenure Track Assistant Professor of Experimental Physics
Tenure Track Assistant Professor, Physics
Auburn University Facutly Position in Expermental Laboratory Plasma Physics

Advice for graduate students
Inside Higher Education
Steven Stearns offers some insight and advice for graduate students. Know thyself and know thy advisor. More

More advice for graduate students
Inside Higher Education
So much comes down to good writing skills. Steven Stearns offers some tips on how to write well and write strategically. More

Overcoming the imposter syndrome
About.com
At one time or another nearly every graduate student and new faculty member wonders about his or her competence. This is a common fear often referred to as the impostor syndrome. The impostor syndrome runs rampant in academia — and women are especially prone to it. How do you get over the impostor syndrome? Easier said than done. More

Ready. Set. Go. Transitioning from college to graduate school
GradSchools.com
Compared to your undergraduate education, graduate school is faster paced. Professors expect a lot of work to be done, and there's a lot less hand-holding. More




Latest research New Journal of Physics
IOP Journal    Share    Share on FacebookTwitterShare on LinkedinE-mail
article

Experimental characterization of coherent magnetization transport in a 1-dimensional spin system

Nonmagnetic impurities and in-gap bound states in topological insulators

Magnetic reversal of an artificial square ice: dipolar correlation and charge ordering

Ferromagnetic quantum criticality in the quasi-1-dimensional heavy fermion metal YbNi4P2

Determination of the photoelectron reference plane in nanostructured surfaces
More

Latest research from Physical Review X
Physical Review X    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Engineering a robust quantum spin hall state in graphene via adatom deposition

Quantum excitations in quantum spin ice

Maximum information gain in weak or continuous measurements of qudits: Complementarity is not enough

Editorial: A cross-section of the current research on high-temperature superconductivity

Robustness of s-wave pairing in electron-overdoped A1-yFe2-xSe2 (A=K,​Cs)
More
 

 
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