Results 21 - 40 of 617.
Astronomy / Space - Physics - 15.12.2020
How heavy is Dark Matter? Scientists radically narrow the potential mass range for the first time
Scientists have calculated the mass range for Dark Matter - and it's tighter than the science world thought. Their findings - due to be published in Physical Letters B in March - radically narrow the range of potential masses for Dark Matter particles, and help to focus the search for future Dark Matter-hunters.
Physics - Materials Science - 15.12.2020
Weak force has strong impact on nanosheets
Rice lab finds van der Waals force can deform nanoscale silver for optics, catalytic use You have to look closely, but the hills are alive with the force of van der Waals. Rice University scientists found that nature's ubiquitous "weak" force is sufficient to indent rigid nanosheets, extending their potential for use in nanoscale optics or catalytic systems.
Physics - Computer Science - 14.12.2020
Quantum Internet Tested at Caltech and Fermilab
A joint team of researchers led by Caltech and including collaborators from the Jet Propulsion Laboratory (JPL), which Caltech manages for NASA, and Fermilab (Fermi National Accelerator Laboratory) have established two test beds using off-the-shelf material and state-of-the-art quantum devices to accurately teleport quantum information for a sustained period across a distance of 44 kilometers.
Physics - 14.12.2020
Transforming detection with quantum-enabled radar
Radars are being installed at the top of an engineering building at the University of Birmingham as part of a demonstration intended to test and prove the precision of quantum-enabled radar detection capabilities. A key part of keeping everyday life secure is being able to detect dangerous or unsafe situations before they occur.
Physics - Chemistry - 14.12.2020
Scientists Recruit New Atomic Heavyweights in Targeted Fight Against Cancer
New methods could lead to single-molecular systems for both diagnosing and treating cancer in real time A promising approach to treating cancer - called targeted alpha-particle therapy or TAT - could better harness the curative power of radiation treatments and lessen the severity of their more debilitating side effects.
Physics - Chemistry - 14.12.2020
Sheets of carbon nanotubes come in a rainbow of colors
Study: Nanotube films come in 466 colors, could be used in electronics, solar panels Nanomaterials researchers in Finland, the United States and China have created a color atlas for 466 unique varieties of single-walled carbon nanotubes. The nanotube color atlas is detailed in a study in Advanced Materials about a new method to predict the specific colors of thin films made by combining any of the 466 varieties.
Physics - Materials Science - 14.12.2020
When less is more: a single layer of atoms boosts the nonlinear generation of light
A wide array of technologies, ranging from lasers and optical telecommunication to quantum computing rely on nonlinear optical interaction. Typically, these nonlinear interactions, which allow a beam of light, for example, to change its frequency, are implemented by bulk materials. In a new study an international research team led by the University of Vienna have shown that structures built around a single layer of graphene allow for strong optical nonlinearities that can convert light.
Physics - 14.12.2020
Physicists create time reversed optical waves
Optics researchers from The University of Queensland and Nokia Bell Labs in the US have developed a new technique to demonstrate the time reversal of optical waves, which could transform the fields of advanced biomedical imaging and telecommunications. Time reversal of waves in physics doesn't mean travelling back to the future; it describes a special type of wave which can retrace a path backwards through an object, as if watching a movie of the travelling wave, played in reverse.
Life Sciences - Physics - 14.12.2020
Bacterial nanopores open the future of data storage
Bioengineers at EPFL have developed a nanopore-based system that can read data encoded into synthetic macromolecules with higher accuracy and resolution than similar methods on the market. The system is also potentially cheaper and longer-lasting, and overcomes limitations that prevent us from moving away from conventional data storage devices that are rapidly maxing out in capacity and endurance.
Event - Physics - 11.12.2020
Farewell to Daya Bay Site, Proceed with Final Data Analysis
The Daya Bay Reactor Neutrino Experiment collaboration - which made a precise measurement of an important neutrino property eight years ago, setting the stage for a new round of experiments and discoveries about these hard-to-study particles - has finished taking data. Though the experiment is formally shutting down, the collaboration will continue to analyze its complete dataset to improve upon the precision of findings based on earlier measurements.
Physics - Astronomy / Space - 09.12.2020
Breakthrough in nuclear physics
High-precision measurements of the strong interaction between stable and unstable particles The positively charged protons in atomic nuclei should actually repel each other, and yet even heavy nuclei with many protons and neutrons stick together. The so-called strong interaction is responsible for this.
Physics - Materials Science - 09.12.2020
"Game changer" perovskite can detect gamma rays
Scientists at EPFL have developed a game-changing perovskite material that can be used as a cheaper and highly efficient alternative to gamma-ray detectors. Perovskites are materials made up of organic compounds bound to a metal. Propelled into the forefront of materials' research because of their structure and properties, perovskites are earmarked for a wide range of applications, including in solar cells, LED lights, lasers, and photodetectors.
Physics - Environment - 09.12.2020
Hidden symmetry could be key to more robust quantum systems, researchers find
Researchers have found a way to protect highly fragile quantum systems from noise, which could aid in the design and development of new quantum devices, such as ultra-powerful quantum computers. Until we can find a way to make quantum systems more robust, their real-world applications will be limited Shovan Dutta The researchers, from the University of Cambridge, have shown that microscopic particles can remain intrinsically linked, or entangled, over long distances even if there are random disruptions between them.
Physics - Astronomy / Space - 07.12.2020
Scientists get the lowdown on sun’s super-hot atmosphere
Orbiting instrument hints at how stored magnetic energy heats solar atmosphere A phenomenon first detected in the solar wind may help solve a long-standing mystery about the sun: why the solar atmosphere is millions of degrees hotter than the surface. Images from the Earth-orbiting Interface Region Imaging Spectrograph , aka IRIS, and the Atmospheric Imaging Assembly , aka AIA, show evidence that low-lying magnetic loops are heated to millions of degrees Kelvin.
Earth Sciences - Physics - 04.12.2020
Crystals may help reveal hidden Kilauea Volcano behavior
Stanford researchers used millimeter-sized crystals from the 1959 eruption of Hawaii's Kilauea Volcano to test models that offer insights about flow conditions prior to and during an eruption. Scientists striving to understand how and when volcanoes might erupt face a challenge: many of the processes take place deep underground in lava tubes churning with dangerous molten Earth.
Physics - Astronomy / Space - 04.12.2020
90 Years of Neutrino Science
Scientists at Berkeley Lab have contributed much to the field since the Dec. 4, 1930, letter that theorized this particle's existence They come in three flavors and can transform among these different types as they travel. They pass through most matter undetected and uninterrupted. Tens of trillions of them are passing through your body in the time it takes to read this sentence.
Physics - Chemistry - 04.12.2020
Hydrogen Embrittlement (HE)
By Andreas Drexler, Hamdi Elsayed, Rudolf Vallant .. of Ultra-High-Strength Steel Screws in Service: Still a Development Potential? Hydrogen embrittlement is a major concern for the automotive, construction, and energy sectors. It limits the use of new ultra-high-strength steels, which have huge advantages in reducing raw material consumption, decreasing fuel consumption, and decreasing carbon dioxide emissions.
Physics - Chemistry - 04.12.2020
Spinach, a Key Ingredient in a Series of Groundbreaking Experiments at Freie Universität Berlin
X-ray experiments carried out at BESSY prove that photosystems from spinach can form manganese oxide nanoparticles - a product of oxygenic photosynthesis No 238/2020 from Dec 04, 2020 An interdisciplinary research team at Freie Universität led by Professor Holger Dau and Professor Robert Burnap from Oklahoma State University have proved that protein complexes in modern photosynthesis can form manganese oxide when exposed to light.
Physics - Sport - 03.12.2020
An optical curveball
Have you ever been amazed by a curveball goal scored by Diego Maradona, Lionel Messi or Christiano Ronaldo? Then you have - possibly without knowing it - been exposed to the Magnus effect: the fact that spinning objects tend to move along curved paths. In a new publication that appeared in Physical Review Letters this week, Robert Spreeuw shows that the same effect occurs to atoms moving through light - and that this effect has practical consequences.
Physics - Chemistry - 03.12.2020
Titanium Atom That Exists in Two Places at Once in Crystal to Blame for Unusual Phenomenon
Researchers discover why a perfect crystal is not good at conducting heat, although it seemingly should be The crystalline solid BaTiS 3 (barium titanium sulfide) is terrible at conducting heat, and it turns out that a wayward titanium atom that exists in two places at the same time is to blame. The discovery, made by researchers from Caltech, USC, and the Department of Energy's Oak Ridge National Laboratory (ORNL), was published on November 27 .