Graphene’s cousin silicene makes transistor debut. Seven years ago, silicene was little more than a theorist’s dream.
Buoyed by a frenzy of interest in graphene — the famous material composed of a honeycomb of carbon just one atom thick — researchers speculated that silicon atoms might form similar sheets. And if they could be used to build electronic devices, these slivers of silicene could enable the semiconductor industry to achieve the ultimate in miniaturization. This week, researchers took a significant step towards realizing that dream, by unveiling details of the first silicene transistor1. Although the device’s performance is modest, and its lifetime measured in mere minutes, this proof of concept has already been causing a stir at conferences, says Deji Akinwande, a nanomaterials researcher at the University of Texas at Austin who helped to make the transistor. Guy Le Lay, a materials scientist at Aix-Marseille University in France, agrees. Its carbon-based cousin graphene gets more attention, but silicene is catching up. Conscious Brain-to-Brain Communication in Humans Using Non-Invasive Technologies.
Human sensory and motor systems provide the natural means for the exchange of information between individuals, and, hence, the basis for human civilization.
The recent development of brain-computer interfaces (BCI) has provided an important element for the creation of brain-to-brain communication systems, and precise brain stimulation techniques are now available for the realization of non-invasive computer-brain interfaces (CBI). Quantum Biology.
Neuroscience. Genetics. Biotech Startup uBiome Aims To Sequence The Bacteria That Call Our Bodies Home. When you look at your body in the mirror, most of what you consider to be “you” actually isn’t you, at least not in a biological sense.
That’s because there are approximately 10 bacterial cells for every single human cell in the body. E. chromi: Designer Bacteria. E. chromi, a short film about a unique collaboration between designers and biologists has won the best documentary award at Bio:Fiction, the world’s first synthetic biology film festival, held earlier this month in Vienna.E. chromi tells the story of a project uniting designers Alexandra Daisy Ginsberg and James King with a team of undergraduate biology students at Cambridge University.
Using genes from existing organisms, the team designed custom DNA sequences, called BioBricks, and inserted them into E. coli bacteria.The new E. coli—dubbed “E. chromi”—were programmed to express a rainbow of colors when exposed to various chemicals. Fig wasp and fig fruit. Isolated patch of water, trapped under ice, sustains bacterial community. The State of Climate Science. Polls show that many members of the public believe that scientists substantially disagree about human-caused global warming.
The gold standard of science is the peer-reviewed literature. If there is disagreement among scientists, based not on opinion but on hard evidence, it will be found in the peer-reviewed literature. I searched the Web of Science, an online science publication tool, for peer-reviewed scientific articles published between January first 1991 and November 9th 2012 that have the keyword phrases “global warming” or “global climate change.” The search produced 13,950 articles. One Astrobiologist's Plan to Save the Search for Alien Life. A conceptual illustration of the Europa Jupiter System Mission, or EJSM, which consists of an orbiter for both Europa and Ganymede.
Image: NASA/Michel Carroll Jupiter’s moon Europa hides an ocean of water beneath its icy crust that might harbor extraterrestrial life. Unfortunately, big dollar signs have kept alive the fictional decree in Arthur C. Meteorites, not comets, may have brought water to Earth. Modern Earth is wet and temperate (last week's heat wave aside), but the early Earth was molten and hostile, meaning water and other volatile substances like hydrogen and nitrogen compounds must have been deposited after formation.
The likely culprits are comets—full of water ice and organic compounds—and meteorites, which were likely more water-laden in the early days of the Solar System. Knowing exactly where Earth's water and organic molecules originated would reveal a great deal about our planet's history and help us understand the environment in which life arose. The Fabric of the Cosmos. PBS airdate: 11/16/2011 NARRATOR: Lying just beneath everyday reality is a breathtaking world, where much of what we perceive about the universe is wrong.
Physicist and best-selling author Brian Greene takes you on a journey that bends the rules of human experience. BRIAN GREENE (Columbia University): Why don't we ever see events unfold in reverse order? According to the laws of physics, this can happen. NARRATOR: It's a world that comes to light as we probe the most extreme realms of the cosmos, from black holes to the Big Bang to the very heart of matter, itself.
BBC Universe – Dark matter: A chunk of the Universe is missing. Dark matter is a type of matter hypothesized in astronomy and cosmology to account for effects that appear to be the result of mass where no such mass can be seen.
Dark matter cannot be seen directly with telescopes; evidently it neither emits nor absorbs light or other electromagnetic radiation at any significant level. It is otherwise hypothesized to simply be matter that is not reactant to light. Mystery of dark matter may be near to being deciphered. (Phys.org)—The universe is comprised of a large amount of invisible matter, dark matter.
It fills the space between the galaxies and between the stars in the galaxies. Twist in dark matter tale hints at shadow Milky Way - space - 11 April 2013. Read full article. Dark matter images reveal widest view of dark mystery. 9 January 2012Last updated at 19:07 By Jason Palmer Science and technology reporter, BBC News, Austin, Texas The survey dwarfs the previous largest map, shown at centre alongside the moon for comparison of size in the sky Researchers have released the biggest images yet detailing dark matter, the mysterious substance that makes up 85% of the Universe's mass. Each image, a billion light-years across, shows evidence of dark matter clumps scattered through the cosmos. The team from the Canada-France Hawaii Telescope inferred the dark matter's existence by the way it bends light.
Dark matter’s tendrils revealed. Jörg Dietrich, University of Michigan/University Observatory Munich Dark-matter filaments, such as the one bridging the galaxy clusters Abell 222 and Abell 223, are predicted to contain more than half of all matter in the Universe. BBC Universe - Dark energy mystery: The Universe is 'speeding up' In physical cosmology and astronomy, dark energy is a hypothetical form of energy that permeates all of space and tends to accelerate the expansion of the universe. Dark energy is the most accepted hypothesis to explain observations since the 1990s that indicate that the universe is expanding at an accelerating rate. According to the Planck mission team, and based on the standard model of cosmology, on a mass–energy equivalence basis the universe contains 26.8% dark matter and 68.3% dark energy (for a total of 95.1%) and 4.9% ordinary matter.
Hubble times Milky Way and Andromeda galaxy pile-up. 31 May 2012Last updated at 21:01 GMT By Jonathan Amos Science correspondent, BBC News. David Deutsch on our place in the cosmos. David Deutsch and Quantum Computing. ANNALS OF SCIENCE about David Deutsch and quantum computing. Epic study confirms Einstein on space-time vortex around Earth. Einstein was right: There is a four-dimensional space-time vortex around Earth, and the spin of Earth does twist space-time. That’s according to NASA, in an announcement made 52 years after scientists first imagined how to test Einstein’s theory on space-time – before the technology to test it had even been invented. NASA’s Kepler Telescope Finds Planet Orbiting Two Stars. 'Habitable' planet discovered circling Tau Ceti star. A planet with conditions that could support life orbits a twin neighbour of the sun visible to the naked eye, scientists have revealed.
Immune System, Loaded With Remade T-cells, Vanquishes Cancer. Flexible Adult Stem Cells, Right There In Your Eye. New drug could cure nearly any viral infection. Most bacterial infections can be treated with antibiotics such as penicillin, discovered decades ago. However, such drugs are useless against viral infections, including influenza, the common cold, and deadly hemorrhagic fevers such as Ebola. Now, in a development that could transform how viral infections are treated, a team of researchers at MIT’s Lincoln Laboratory has designed a drug that can identify cells that have been infected by any type of virus, then kill those cells to terminate the infection. The microscope images above show that DRACO successfully treats viral infections. In the left set of four photos, rhinovirus (the common cold virus) kills untreated human cells (lower left), whereas DRACO has no toxicity in uninfected cells (upper right) and cures an infected cell population (lower right).
The drug works by targeting a type of RNA produced only in cells that have been infected by viruses. How to Find Limits of Mathematical Functions - Decoded Science ‘The Character of Physical Law’: Richard Feynman’s Legendary Lecture Series at Cornell, 1964. A k'wala's SciTech Daily. The National Academies Press. Entropy can drive the formation of complex quasicrystals - From a thermodynamics perspective, all systems, even the universe itself, are all driven by two aspects of their state—entropy and energy.
Any closed system will simultaneously tend towards a minimum energy or maximum entropy state—open systems behave differently, but the idea is similar. Under a variety of conditions, these two states represent opposites: a system that has obtained the maximum possible entropy is often a high energy state; conversely, the low energy state may be a nicely ordered system with little disorder.
It can be tough to study what entropy alone can do. In real world systems, energetic contributions—such as changes in chemical bonds—often dominate, preventing us from observing the beauty of what disorder alone can accomplish. To overcome the shackles of reality, researchers have employed molecular thermodynamic simulations to study hard systems—those that have no attractive forces, but do exhibit repulsion due to the shapes of individual particles.
Magnetic logic makes for mutable chips. Software can transform a computer from a word processor to a number cruncher to a video telephone. But the underlying hardware is unchanged. Now, a type of transistor that can be switched with magnetism instead of electricity could make circuitry malleable too, leading to more efficient and reliable gadgets, from smart phones to satellites. Technofascism blog » Blog Archive » Double kill shot dealt to the religion of scientific materialism. The strange case of solar flares and radioactive elements. Are Security Scanners Safe?