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Home   About   Membership   Conference   Public Policy   Job Board    March 30, 2011
  National Society of Black Physicists    African Physical Society   South African Institute of Physics    
 
 
The sense of smell may be a quantum effect
BBC Science    Share   Share on FacebookTwitterShare on LinkedinE-mail article
At the American Physical Society meeting in March, researchers reported on experiments that used nanowires to show that as electrons move on proteins within the nose, odor molecules could absorb these quanta and thereby be detected. If the results and corresponding explanation are correct, an "electronic nose" superior to any chemical sensor could be devised. More



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New science suggests we might soon be able to mix computers and neurons
PhysOrg.com    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A research team at the University of Wisconsin has been able to successfully coax nerve cell tendrils to grow through tiny tubes made of silicon and germanium. Inside the tubes the nerve cells would extend outwards as if they were seeking something, and they would even follow contours in the tube. The result opens the door to the possibility of regenerating nerve cells damaged due to disease or injury. More

Plutonium may actually enhance human health
The National Post    Share    Share on FacebookTwitterShare on LinkedinE-mail article
In the 1970s and 1980s, U.S. Department of Energy researcher conducted research using dogs to determine the dangers to nuclear workers of inhaling plutonium alpha particles. As expected, the study back then found that plutonium alpha particles when inhaled led to lung cancers, and the more that was inhaled, the greater the number of cancers. But a recent reassessment of the data has found that dogs that received low doses contracted fewer cancers than ones that were not irradiated, and ones that received very low doses — in the range of 8 cGy to 22 cGy — came down with no lung tumors at all. More



Heisenberg uncertainty limit broken
PhysicsWorld.com    Share    Share on FacebookTwitterShare on LinkedinE-mail article
In 2007, a group led by Carlton Caves at the University of New Mexico in the U.S., predicted that the Heisenberg limit could be beaten by introducing nonlinear interactions between the measuring particles. That prediction has now been shown to be true, thanks to an experiment carried out by Morgan Mitchell and colleagues at the Institute of Photonic Sciences at Barcelona. More

Physicists move closer to efficient single-photon sources
EurekAlert    Share    Share on FacebookTwitterShare on LinkedinE-mail
article
A team of physicists in the United Kingdom has taken a giant step toward realizing efficient single-photon sources, which are expected to enable much-coveted completely secure optical communications, also known as "quantum cryptography." Reported in Applied Physics Letters, nanofabrication techniques were used to etch hemispherical 'solid immersion lenses' into fluorescent "defect centers" in diamond, which act like atomic-scale light sources. Importantly these systems do not have to be held at super cold cryogenic temperatures or trapped in large electromagnetic fields to be stable—unlike quantum dots or trapped atoms. More

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Modified Newtonian Dynamics with gas rich galaxies
American Physical Society    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Vera Rubin's 1970s seminal results on rotation curves of spiral galaxies was compelling evidence for the concept of dark matter, which had been proposed by Fritz Zwicky 40 years earlier. The dark matter argument has become the most widely accepted cosmological model. But Modified Newtonian Dynamics, which modifies gravity at small accelerations, presents an alternate explanation of the flat rotation curves found by Rubin and her colleagues. In a paper in Physical Review Letters Stacy McGaugh at the University of Maryland suggests that for a class of galaxies with stellar masses that are outweighed by their atomic gas masses relation can be used to test the validity of MOND. More

Coldest known star is a brown dwarf about as hot as a cup of tea
ScienceDaily    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A newly discovered brown dwarf, identified as CFBDSIR 1458+10B, is the coldest known star in the universe. It is the dimmer member of a binary brown dwarf system located just 75 light-years from Earth. Unravelling the secrets of this unique object involved exploiting the power of three different telescopes. CFBDSIR 1458+10 was first found to be a binary using the Laser Guide Star Adaptive Optics system on the Keck II Telescope in Hawaii. The Canada-France-Hawaii Telescope was to determine the distance to the brown dwarf duo using an infrared camera. And finally the European Southern Observatory's Very Large Telescope was used to study the object's infrared spectrum and measure its temperature. More

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Nigerians celebrate 5-year anniversary of total solar eclipse
Nigerian Compass    Share    Share on FacebookTwitterShare on LinkedinE-mail article
March 29, 2006, will forever remain one of the most important dates in Nigerian history. It was the day millions of Nigerians and foreigners converged at different parts of the country to observe a matrimonial squabble on the sky, between the sun (regarded as the husband) and the moon,(known as the wife),— a natural phenomenon scientifically known as solar eclipse. On that day, all eyes were on the sky, as the eclipse swept the Earth from Brazuk through Western Africa. More

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New dyes enable better optical images in medicine
Physorg.com    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Visible and especially infrared light can also be used to image human tissue, especially when aided by chemical contrast agents. A team led by Wenbin Lin at the University of North Carolina has introduced a novel contrast agent that marks tumor cells in vitro. The dye is a phosphorescent ruthenium complex incorporated into nanoparticles of a metal–organic coordination polymer, which allows an extraordinarily high level of dye loading. More

Another astronomy technique spills over into biomedical research
Physorg.com    Share    Share on FacebookTwitterShare on LinkedinE-mail article
This list of results from astronomy that have impacted other fields is actually very long. A researcher at Washington University of St. Louis has added to the list. To correct for atmospheric blurring, astronomers sometimes shine a laser into the sky near the spot where a telescope is pointing. The laser beam energizes sodium atoms naturally present above the stratosphere, producing a glowing artificial star called a guide star. A biomedical application of this technique, called time-reversed ultrasonically encoded optical focusing, allows light to be focused to a controllable position within tissue and promises game-changing improvements in biomedical imaging and light therapy. More



Japanese scientists use alcoholic drinks to induce superconductivity
Physorg.com    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Scientists from the National Institute for Materials Science, Japan, found that immersing pellets of an iron-based compound in heated alcoholic beverages for 24 hours greatly increases their superconducting ability. Iron-based compounds usually become superconductive after being exposed to air. This process however can take up to several months. This study demonstrated that superconductivity can be induced in just one day. The exact mechanism behind this effect is largely unknown, however the researchers suggest that it may be due to the insertion of electrically charged particles into the layers of the compound. An alternative theory is that the alcoholic beverages help to supply oxygen into the sample, which in turn causes superconductivity. More



National Society of Black Physicists jobs board postings
NSBP    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Director, African Institute for Mathematical Sciences Ghana
Assistant Professor - Physics
APS Scholarship Program for Minority Undergraduate Physics Majors
Assistant Professor, Energy Resources Engineering
Assistant or Associate Professor - Astronomy / Astrophysics
HBCU STEM Fellowship Program
Dean of Science and Health Careers
REU Program and University of Houston
Internship
Research Experience for Undergraduates Fellowship in PHYSICS
Research Experience for Undergraduates Fellowship in PHYSICS
Undergraduate Researchers
Lehigh University REU Program in Physics
REU Participant
Student Researcher
REU Astronomy Intern
REU Student
Summer Student Researcher
Gulf of Maine and the World Ocean REU
Summer REU Intern
Research Experiences for Undergraduates in Lasers, Optics and Optical Materials




Latest research from Physical Review C
Physical Review C    Share    Share on FacebookTwitterShare on LinkedinE-mail article

'Ridge' in proton-proton scattering at 7 TeV

Chaos in fermionic many-body systems and the metal-insulator transition

Solar neutrino results in Super-Kamiokande-III

Improved AdS/QCD model with matter

Primordial beryllium as a big bang calorimeter
More

Latest research from the Journal of Radiological Protection
Journal of Radiological Protection    Share    Share on FacebookTwitterShare on LinkedinE-mail article


Practical matters for the control of contamination in a nuclear medicine department

Agenda for Research on Chernobyl Health New ICNIRP exposure guidelines — Scale of UK exposure to x-rays revealed

A new, passive dosemeter for gamma, beta and neutron radiations

Measurement and analysis of electromagnetic fields of pulsed magnetic field therapy systems for private use

Energy absorption and exposure buildup factors for some polymers and tissue substitute materials: photon energy, penetration depth and chemical composition dependence

Observation and analysis of atmospheric radon in Qingdao, China

Cancer consequences of the Chernobyl accident: 20 years on

The silver anniversary of the Chernobyl accident. Where are we now?

Radiation accidents over the last 60 years
 

 
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