Physics posts
- May 15, 2013
- 04:07 PM
- 44 views
Discovering a new planet (TAU-CfA articles)
by Perikis Livas in Tracing Knowledge
1.TAU team takes part in discovering new planet
A team of astronomers at TAU and the Harvard-Smithsonian Center for Astrophysics have announced the first-ever discovery of an extrasolar planet via induced relativistic beaming of light from the host star.
2.New Method of Finding Planets Scores its First Discovery
- CfA... Read more »
TAU News office. (2013) TAU team takes part in discovering new planet. Tel Aviv University. info:/
- May 15, 2013
- 12:45 PM
- 40 views
The Modern Prometheus: Scientists Uncover the Secret of ‘Magnetic Fire’
by dailyfusion in The Daily Fusion
A group of physicists from the New York University have uncovered how energy is released and dispersed in magnetic materials in a process similar to the spread of forest fires. This finding not only has the potential to deepen our understanding of self-sustained chemical reactions, but also could open new exciting possibilities for energy storage.... Read more »
Subedi, P., Vélez, S., Macià, F., Li, S., Sarachik, M., Tejada, J., Mukherjee, S., Christou, G., & Kent, A. (2013) Onset of a Propagating Self-Sustained Spin Reversal Front in a Magnetic System. Physical Review Letters, 110(20). DOI: 10.1103/PhysRevLett.110.207203
- May 14, 2013
- 06:10 PM
- 1 view
Thoughts on Fairbank's Quantized Flux Discovery and the Quantum Hall Effect
by Hamilton Carter in Copasetic Flow
William Fairbank might be most famous for experimentally demonstrating that magnetic flux is quantized[1]. In 1961 he published the results of an experiment that exposed very small cylinders of superconducting tin to a magnetic field and then measured the magnetic flux trapped by the cylinder after the applied magnetic field was turned off. For more detail on why the flux was trapped, see [2]. He arrived at the following graph of trapped flux vs. applied field strength. (pictur........ Read more »
Deaver Bascom, & Fairbank William. (1961) Experimental Evidence for Quantized Flux in Superconducting Cylinders. Physical Review Letters, 7(2), 43-46. DOI: 10.1103/PhysRevLett.7.43
Yennie D. (1987) Integral quantum Hall effect for nonspecialists. Reviews of Modern Physics, 59(3), 781-824. DOI: 10.1103/RevModPhys.59.781
Foner Simon. (1959) Versatile and Sensitive Vibrating-Sample Magnetometer. Review of Scientific Instruments, 30(7), 548. DOI: 10.1063/1.1716679
- May 14, 2013
- 03:16 PM
- 36 views
Graphene Redefines Electric Current, Literally
by dailyfusion in The Daily Fusion
A new joint innovation by the National Physical Laboratory (NPL) and the University of Cambridge could pave the way for redefining the ampere in terms of fundamental constants of physics. The world’s first graphene single-electron pump (SEP) provides the speed of electron flow needed to create a new standard for electrical current based on electron charge.... Read more »
Connolly, M., Chiu, K., Giblin, S., Kataoka, M., Fletcher, J., Chua, C., Griffiths, J., Jones, G., Fal'ko, V., Smith, C.... (2013) Gigahertz quantized charge pumping in graphene quantum dots. Nature Nanotechnology. DOI: 10.1038/nnano.2013.73
- May 14, 2013
- 10:06 AM
- 39 views
First ever discovery of an alien planet with the help of Einstein's Theory of Relativity
by Usman Paracha in SayPeople
Main Point:
Scientists have found, for the first time, an alien planet, dubbed as "Einstein's planet", with the help of the Einstein's Theory of Relativity.
Published in:
The Astrophysical Journal
Study Further:
"Einstein's planet" is officially called as Kepler-76b and is the first planet found by this method. It is the latest of the 800 planets located beyond our Solar System.
This planet is 25% larger than Jupiter and is two times of its we........ Read more »
Simchon Faigler, Lev Tal-Or, Tsevi Mazeh, Dave W. Latham, & Lars A. Buchhave. (2013) BEER analysis of Kepler and CoRoT light curves: I. Discovery of Kepler-76b: A hot Jupiter with evidence for superrotation. The Astrophysical Journal. arXiv: 1304.6841v3
- May 13, 2013
- 02:06 PM
- 44 views
Earth's central part is rotating differently than the rest of the planet
by Usman Paracha in SayPeople
Main Point:
Scientists have found that the inner-core of the Earth rotates at a different and variable rate than the mantle - the central part of the Earth or another planet that is present between the core and the crust.
Published in:
Nature Geoscience
Study Further:
Scientists observed earthquake doublets - pairs of nearly identical earthquakes that can occur a couple of weeks to 30 or 40 years apart - over the last 5 decades to find the speed of the inner-core of the Earth.
........ Read more »
Tkalčić, H., Young, M., Bodin, T., Ngo, S., & Sambridge, M. (2013) The shuffling rotation of the Earth’s inner core revealed by earthquake doublets. Nature Geoscience. DOI: 10.1038/ngeo1813
- May 13, 2013
- 01:21 PM
- 1 view
The Strange Story of Free Fractional Charge
by Hamilton Carter in Copasetic Flow
The currently widely held wisdom is that quarks, the subatomic constituents that make up protons and neutrons, cannot be found in an unbound state, (i.e. roaming freely outside of a proton, neutron, or other particle made up of quarks). The reasoning goes that the attractive force due to the strong force between two quarks is so powerful that if they are separated far enough apart, there will be enough energy stored in the strong field to create two additional quarks that w........ Read more »
Phillips James D., Fairbank William M., & Navarro José. (1988) Recent results in the search for fractional charge at Stanford. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 264(1), 125-130. DOI: 10.1016/0168-9002(88)91113-8
- May 13, 2013
- 11:11 AM
- 68 views
How to Convince People WiFi Is Making Them Sick
by Elizabeth Preston in Inkfish
All it takes is an antenna on a headband. If you've got a breathless video report on the dangers of wireless internet connections, that will help your case. It doesn't take much, though, to turn an ominous hint into a real headache.
Some people consider themselves sensitive to electromagnetic fields. They report symptoms such as burning skin, tingling, nausea, dizziness, or chest pain, and they blame their malaise on nearby power lines, cell phones, or WiFi networks. A recent Slate arti........ Read more »
Witthöft, M., & Rubin, G. (2013) Are media warnings about the adverse health effects of modern life self-fulfilling? An experimental study on idiopathic environmental intolerance attributed to electromagnetic fields (IEI-EMF). Journal of Psychosomatic Research, 74(3), 206-212. DOI: 10.1016/j.jpsychores.2012.12.002
- May 13, 2013
- 09:45 AM
- 37 views
A Quantum Version of Google
by Carian Thus in United Academics
A team of computer scientists in Spain applied a quantum PageRank algorithm to a network with 7 webpages. They found that the quantum PageRank sometimes ordered the webpages differently in terms of importance, but averaging the quantum PageRank score over time recovered the classical ordering.... Read more »
Paparo, G., & Martin-Delgado, M. (2012) Google in a Quantum Network. Scientific Reports. DOI: 10.1038/srep00444
- May 12, 2013
- 08:35 AM
- 45 views
Electromicrobiology - One of the rapidly rising scientific fields
by Usman Paracha in SayPeople
Introduction:
Electromicrobiology is one of the rising subjects in the field of science. It combines the technology with biology.
In this subject, initially scientists found the transmission of electrical signals between the microbes. On a further note, in this subject, we study about the complex interaction between the microorganisms and technological devices while considering the novel electrical properties of the microorganisms i.e. accepting or donating the electrons from electrodes wi........ Read more »
Lovley, D. (2012) Electromicrobiology. Annual Review of Microbiology, 66(1), 391-409. DOI: 10.1146/annurev-micro-092611-150104
- May 11, 2013
- 11:18 PM
- 1 view
Crystal Power: Benchtop Fusion Devices
by Hamilton Carter in Copasetic Flow
A few weeks ago I wrote several background posts on low energy nuclear reactions, (LENR). The vote is still out on whether or not LENR is conclusively showing results. There's another type of bench top fusion device that is working though and it's based on a crystal. In April of 2005, three researchers from UCLA reported in Nature the results of an experiment where they fused pairs of deuterium atoms to create helium three and a free neutron with an energy of app........ Read more »
Naranjo B., Gimzewski J.K., & Putterman S. (2005) Observation of nuclear fusion driven by a pyroelectric crystal. Nature, 434(7037), 1115-1117. DOI: 10.1038/nature03575
GAMOW G. (1928) The Quantum Theory of Nuclear Disintegration. Nature, 122(3082), 805-806. DOI: 10.1038/122805b0
Matthias B., & Remeika J. (1949) Ferroelectricity in the Ilmenite Structure. Physical Review, 76(12), 1886-1887. DOI: 10.1103/PhysRev.76.1886.2
Valasek J. (1921) Piezo-Electric and Allied Phenomena in Rochelle Salt. Physical Review, 17(4), 475-481. DOI: 10.1103/PhysRev.17.475
Mueller Hans. (1935) Properties of Rochelle Salt. Physical Review, 47(2), 175-191. DOI: 10.1103/PhysRev.47.175
- May 11, 2013
- 01:34 PM
- 71 views
Birth of a Black Hole
by Perikis Livas in Tracing Knowledge
A new kind of cosmic flash may reveal something never seen before: the birth of a black hole.... Read more »
Marcus Woo. (2013) Birth of a Black Hole. Caltech news . info:/
- May 10, 2013
- 12:55 PM
- 1 view
More Quantum Coincidences, the Sudden Approximation and Reading Journals
by Hamilton Carter in Copasetic Flow
As I started into work this morning, I had an email announcing a symposium next Monday on symmetry groups and physics. From the meeting announcementIt is often stated that the set of symmetry operators that leave a Hamiltonian invariant forms a group.I noticed that the presenter was Dr. Ed Brown, from Rensselaer Polytechnic Institute and immediately remembered... well, it's the tail end of finals week here... remembered.... that I was supposed to remember somebody from that school. &n........ Read more »
McVOY KIRK. (1965) Symmetry Groups in Physics. Reviews of Modern Physics, 37(1), 84-104. DOI: 10.1103/RevModPhys.37.84
Levinger J. (1953) Effects of Radioactive Disintegrations on Inner Electrons of the Atom. Physical Review, 90(1), 11-25. DOI: 10.1103/PhysRev.90.11
- May 10, 2013
- 09:32 AM
- 58 views
Scientists Use Cyborg Plants to Harvest Solar Energy
by dailyfusion in The Daily Fusion
Our star, the Sun, provides most of the energy on this planet. (Essentially, all the energy except for nuclear, comes directly or indirectly from it.) Our current methods of converting solar radiation into electricity (photovoltaics) are not very efficient in comparison with plants. Researchers at the University of Georgia looked to nature for inspiration, and they are now developing a new technology that makes it possible to use plants to generate electricity.... Read more »
Calkins, J., Umasankar, Y., O'Neill, H., & Ramasamy, R. (2013) High photo-electrochemical activity of thylakoid–carbon nanotube composites for photosynthetic energy conversion. Energy . DOI: 10.1039/C3EE40634B
- May 10, 2013
- 08:40 AM
- 60 views
Exotic atoms hold clues to unsolved physics puzzle at the dawn of the universe
by Perikis Livas in Tracing Knowledge
An international team of physicists has found the first direct evidence of pear shaped nuclei in exotic atoms.
The findings could advance the search for a new fundamental force in nature that could explain why the Big Bang created more matter than antimatter—a pivotal imbalance in the history of everything.... Read more »
Nicole Casal Moore. (2013) Exotic atoms hold clues to unsolved physics puzzle at the dawn of the universe. The Michigan State University. info:/
- May 9, 2013
- 04:52 PM
- 1 view
Coherent Expectations
by Hamilton Carter in Copasetic Flow
OK, so let's say you're assigned the problem of determining the mean value, (the expectation value), for n, (the number state), in a harmonic oscillator with a coherent state. You go back to your favorite coherent state reference by Nieto and Carruthers[1] and get the probability for finding your coherent oscillator in the nth level almost immediately, (picture 1),You're looking for the expectation value for n though, so you need to multiply the probabilty by n and sum the whole ........ Read more »
Carruthers P. (1965) Coherent States and the Forced Quantum Oscillator. American Journal of Physics, 33(7), 537. DOI: 10.1119/1.1971895
- May 9, 2013
- 06:10 AM
- 59 views
Herschel finds hot gas on the menu for milky way’s black hole
by Perikis Livas in Tracing Knowledge
ESA’s Herschel space observatory has made detailed observations of surprisingly hot molecular gas that may be orbiting or falling towards the supermassive black hole lurking at the centre of our Milky Way galaxy.... Read more »
ESA. (2013) Herschel finds hot gas on the menu for milky way's black hole. ESA Herschel. info:/
- May 8, 2013
- 05:24 PM
- 45 views
Dual Color Semiconductor Device Opens Way to Cheaper Lighting
by dailyfusion in The Daily Fusion
A group of scientists from the Arizona State University have developed a semiconductor device that is capable of emitting two distinct colors simultaneously. An ability to emit light in a wide spectrum range from a single monolithic structure could potentially become a basis for a cheaper and more efficient lighting technology.... Read more »
Fan, F., Liu, Z., Yin, L., Nichols, P., Ning, H., Turkdogan, S., & Ning, C. (2013) Simultaneous two-color lasing in a single CdSSe heterostructure nanosheet. Semiconductor Science and Technology, 28(6), 65005. DOI: 10.1088/0268-1242/28/6/065005
- May 8, 2013
- 01:38 PM
- 48 views
Fluorescent Dye Increases Solar Cells’ Efficiency
by dailyfusion in The Daily Fusion
Scientists at Yale think that for some solar cells the future may be fluorescent. While many may believe that the purpose of a solar cell is to absorb light, not to emit it (fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation), it turns out that the addition of a fluorescent organic dye to the cell layer improves the ability of a promising type of solar cell to absorb light and convert it into electrical power.... Read more »
Huang, J., Goh, T., Li, X., Sfeir, M., Bielinski, E., Tomasulo, S., Lee, M., Hazari, N., & Taylor, A. (2013) Polymer bulk heterojunction solar cells employing Förster resonance energy transfer. Nature Photonics. DOI: 10.1038/nphoton.2013.82
- May 8, 2013
- 11:49 AM
- 53 views
Getting Science Right: Hazards of Political Statistics
by Andrew Porterfield in United Academics
Radioactive iodine is dangerous, and public health and academic researchers are now trying to determine what long-term damage can occur, where it can occur, and how long it will take to occur. What politcs can learn from Fukushima.... Read more »
J. Mangano, J. (2013) Elevated airborne beta levels in Pacific/West Coast US States and trends in hypothyroidism among newborns after the Fukushima nuclear meltdown. Open Journal of Pediatrics, 03(01), 1-9. DOI: 10.4236/ojped.2013.31001
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