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Stars containing dark matter should look different from other stars
PhysOrg
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Finding evidence for dark matter - the unknown substance that theoretically makes up 23 percent of the universe - has been one of the biggest challenges in modern cosmology. Now in a new study, scientists have shown that feebly annihilating dark matter particles captured inside a star can provide an additional source of energy to the star, resulting in changes to its structure and appearance. Observing these stars could potentially offer scientists a tool to detect and analyze this kind of dark matter. Read the associated Physical Review letters abstract.
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Graphene-based composites could cool electronics
Physics World
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Researchers say that they have developed a new "thermal interface material" (TIM) that could efficiently remove unwanted heat from electronic components such as computer chips or light-emitting diodes. The material is a composite of graphene and multilayer graphene.
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Squid can fly to save energy
Nature News
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Squid can save energy by flying rather than swimming, according to calculations based on high-speed photography. Squid of many species have been seen to 'fly' using the same jet-propulsion mechanisms that they use to swim: squirting water out of their mantles so that they rocket out of the sea and glide through the air. Until now, most researchers have thought that such flight was a way to avoid predators, but new calculations show that propelling themselves through the air may actually be an efficient way for squid to travel long distances.
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Uterus contractions caused by electrical coupling
Physics World
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New research could help explain one of the "miracles" of childbirth – how the uterus contracts to push babies into the world. Computer models, developed by researchers in India and France, reveal that as the moment of birth approaches, the cells in the uterus become more electrically connected, enabling them to behave in synchrony. To date, it had not been clear how the cells in the uterus could act together to generate a large-scale contraction during labor. Read the associated APS Physics Synopsis.
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Sacher Lasertechnik offers fiber coupled optical amplifiers. Available wavelength: 650nm to 1120nm. Free space power of up to 2.5W @ 780nm and 2W @ 850nm are achieved with an M²<1.7. Contact us at 1-800-352-3639 or
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Crystals may be possible in time as well as space
Science News
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What sounds like the title of a bad fantasy movie - time crystals - could be the next big thing in theoretical physics. In two new papers, Nobel Prize-winning physicist Frank Wilczek lays out the mathematics of how an object moving in its lowest energy state could experience a sort of structure in time. Such a "time crystal" would be the temporal equivalent of an everyday crystal, in which atoms occupy positions that repeat periodically in space.
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Obama aims to increase federal science funding in 2013
Scientific American
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The White House has scaled back but boosted its overall funding request for non-defense research and development by 5 percent, pushing it up to $64.9 billion.
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Miniature Tuning Fork Choppers with Integrated Drive Electronics Are Suitable for High Volume, Dedicated Application, Long Life Systems and Portable Instruments.
•ONE fixed frequency from the range of 200 Hz to 3 kHz
•Simple to use, no wiring and no adjustments required
•TTL monitor output (reference signal)
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•Aperture up to 5mm
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We manufacture precision electronic instrumentation for both laboratory and industrial process control applications, and offer a full line of cryogenic temperature controllers, monitors, cryogenic accessories and temperature sensors. Instruments feature a wide temperature range (operation from 20mK to over 1500K), network connectivity and supports a wider variety of temperature sensors than any other manufacturer. MORE
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Quantum Design manufactures a full line of cryogen-free, automated material characterization systems for the scientific community. These systems provide temperatures from 0.05 to 1000 K and magnet fields up to 16 tesla. Cryogen-free systems include the Physical Property Measurement System (PPMS®), MPMS SQUID VSM, VersaLab, and the new PPMS DynaCool. MORE
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Pulsars can help detect gravitational waves
News Track India
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Astronomers are using pulsars, superdense neutron stars, throughout our Milky Way Galaxy as a giant scientific instrument to directly detect gravitational waves.
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Download this National Instruments technical white paper series to help you build a more powerful, flexible, and cost-effective measurement solution. Download now. MORE |
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Physicists entangle 8 photons in 'spooky' experiment
LiveScience
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Researchers have entangled four pairs of photons. The achievement extends the range of previous experiments that had entangled up to six photons.
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VAT will preview a variety of vacuum valves in Boston at booth #135. Stop by or check out our new website to learn more about VAT! MORE |
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DNA nanorobot delivers drugs
Physics World
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Researchers have developed a new nanorobotic device based on DNA that can deliver "cargo," such as drugs, to individual biological cells. The technology might one day be used to treat various diseases by directly programming the immune response of cells.
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Fukushima faces future quakes
Discovery News
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The disastrous magnitude 9.0 earthquake that shook Japan on March 11 of last year greased the wheels for another quake. The quake allowed fluids to move upward in the Earth's crust, which lubricated seismic faults and increased the chance that they will give way and rattle the region again.
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