TIME-WARRIOR
Friday, June 30, 2006
Engineers at the Tokyo Institute of Technology in Japan are building an odour recorder capable of doing just that. Simply point the gadget at a freshly baked cookie, for example, and it will analyse its odour and reproduce it for you using a host of non-toxic chemicals.
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Building on a series of recent breakthroughs in silicon photonics, researchers at the UCLA Henry Samueli School of Engineering and Applied Science have developed a novel approach to silicon devices that combines light amplification with a photovoltaic – or solar panel – effect.
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This online graphing calculator tracks points on the curve, draws multiple equations, moves around like Google Maps, and requires no browser plug-ins.
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Wednesday, June 28, 2006
The Virtual Field Trip is an immersive multimedia application developed to support student and user exploration of areas on Earth that have been identified as analog sites to regions on Mars. Analog sites are those areas that share some common traits with sites on Mars and have been identified based on their significance and importance to NASA.
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webmath.com will not only help you figure out simple and complex mathemathical calculations, it will also provide you with detailed explanations for how the answers are calculated/arrived at.
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Tuesday, June 27, 2006
After years as a purely experimental science, a decade-long international effort will make nuclear fusion a reality.
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Blurring the line between living tissue and computer circuitry, researchers have made living brain cells self-assemble into uniform communications networks, on a so-called brain chip.
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International scientists will recreate the immediate aftermath of the "Big Bang" in a bid to uncover the mysteries of the universe, a world physics summit announced Thursday.
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The neurological basis for poor witness statements and hallucinations has been found by scientists at UCL (University College London). In over a fifth of cases, people wrongly remembered whether they actually witnessed an event or just imagined it, according to a paper published in NeuroImage this week.
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Experimenters have leaped from inference to direct knowledge of the proportions of the B unitarity triangle, the triangle that summarizes knowledge of the rare processes that contribute to the universe's partiality for matter over antimatter. Understanding this partiality is fundamental to understanding why our Universe looks the way it does.
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"The concept of extra dimensions has tantalized physicists for years. Although the math looks good, scientists want physical evidence they can measure. And how do you test for 4 dimensions of space when you
�ve only got a 3-dimensional ruler? One idea is to use gravity, a force that might actually reach across an extra dimension."
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�ve only got a 3-dimensional ruler? One idea is to use gravity, a force that might actually reach across an extra dimension."
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The mathematician and Sci-Fi author, Greg Egan, has some nice short introductions to the basic science like relativity and quantum mechanics that Sci-Fi authors often use in their books. A good overview for the Sci-Fi reader who has no background in science.
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Friday, June 23, 2006
Hawking and Hertog call their theory 'top-down' cosmology, because instead of looking for some fundamental set of initial physical laws under which our Universe unfolded, it starts 'at the top', with what we see today, and works backwards to see what the initial set of possibilities might have been. In effect the present 'selects' the past.
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Thursday, June 22, 2006
Scientists have used Chandra X-ray Observatory to make a breakthrough in understanding how huge amounts of light are generated by supermassive black holes. Here, the leader of this study, Jon Miller, gives some personal and scientific insight into his team's discovery.
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Tuesday, June 20, 2006
The Pentagon says what Carl Collins is cooking up in his lab could power the most devastating bomb this side of a nuke. A long list of heavyweight physicists calls that dangerous bunk. Either way, it'
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If you have what it takes to spend countless hours tinkering with small robots, coding in a brand new language, and filing a stream of bug reports, then the National Robotics Engineering Center wants you to beta test its new multi-plaform bot programming software.
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Monday, June 19, 2006
�The method we have proposed,� says Evgeny Shchukin, �is an extension of the well-known balanced homodyning scheme.� However, unlike the standard scheme used for measuring radiation fields, the scheme developed by Shchukin and his professor, Werner Vogel, allows measurement of all normally ordered correlation functions.
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"An exotic form of silicon that can be stuck together and then peeled apart has been developed by German researchers. The material, dubbed "silicon Velcro", could be used to manufacture microprocessors and devices that manipulate fluids on microscopic scales."
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The work could have implications for making quantum computers and to study bound states on a fundamental level. The experiment also shows how optical lattices can be used to investigate many-body phenomena that are hard to observe in other systems.
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Start with lots and lots of dark matter, then stir in gas. Let the mixture sit for a while, and a galaxy should rise up out of the batter.
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A materials scientist from Sandia National Laboratories argues that nanoscale computer simulations can actually provide more detailed info than "real" experiments.
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Despite decades of searching, the "dark matter" thought to hold galaxies together is still nowhere to be found. Matthew Chalmers describes how some physicists think it makes more sense to change our theory of gravity instead
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"The mind can proceed only so far upon what it knows and can prove. There comes a point where the mind takes a higher plane of knowledge, but can never prove how it got there. All great discoveries have involved such a leap.�
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"The movie shows the stereographic projection of a rotating four dimensional cube onto a three dimensional hyperplane." Very trippy simulation. Check out the Mathematik homepage link at the bottom for some other very cool mathematical simulations and theories.
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A molecule-sized switch just 50 nanometers wide may someday control microscopic machines and also could make DNA sequencing faster, less expensive, and more precise.
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Astonishing multimedia presentation created by NASA in connection with its planned search for "another earth."
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Subspace is a continuum that exist in conjunction with our own space-time continuum. Every point in our universe has a corresponding point in subspace. Also, at every point in our universe, subspace has a particular frame of reference.
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Sunday, June 18, 2006
A cosmic ray detector that will attempt to unlock the secrets of both antimatter and dark matter launched on Thursday. Called PAMELA, the experiment is set to spend at least three years in orbit � providing far longer coverage than the few days of data collected by previous space-based detectors.
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Thursday, June 15, 2006
A device capable of counting the individual electrons in an electric current, by feeding them through a pair of quantum dots, has been developed by scientists in Japan.
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Why take the scenic route through time when shortcuts are just a dimension away? According to Heinrich Päs, a physicist at the University of Hawaii at Manoa, and his colleagues, the door to a time machine could be anywhere and everywhere in our universe. And unlike most other scenarios for time travel, we can test this one here on Earth.
read more | Neutrino oscillations and shortcuts in the extra dimension | Closed timelike curves in asymmetrically warped brane universes | Through The Looking Glass | digg story
read more | Neutrino oscillations and shortcuts in the extra dimension | Closed timelike curves in asymmetrically warped brane universes | Through The Looking Glass | digg story
Tuesday, June 13, 2006
Theorists looking for ways to connect quantum theory with relativity have suggested that a fundamental symmetry known as CPT (Charge, Parity and Time) might be violated, even though it underlies all of modern physics.
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Monday, June 12, 2006
The motivation and one of the initial aims of twistor theory is to provide an adequate formalism for the union of quantum theory and general relativity. Twistors are essentially complex objects, like wavefunctions in quantum mechanics, as well as endowed with holomorphic and algebraic structure sufficient to encode space-time points.
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Peter Woit, a mathematician at Columbia University, has challenged the entire string-theory discipline by proclaiming that its topic is not a genuine theory at all and that many of its exponents do not understand the complex mathematics it employs.
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Sunday, June 11, 2006
Humans discover and understand their world through visual and conversational interactions. Computers (information/communication systems in general) can be designed and built to allow humans to interact in natural ways, using the common skills of speaking, gesturing, glancing, moving around, reaching out.
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IBM research explains on this article from 1995 the concept of teleportation.
Ten years have pass, and I wonder where do they stand now.
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Ten years have pass, and I wonder where do they stand now.
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Explore the world of black holes in an award-winning Web site created by a team led by Roeland van der Marel, an astronomer at the Space Telescope Science Institute. The interactive Web site, called "Black Holes: Gravity's Relentless Pull," rescues black holes from the realm of science fiction and puts them back into the domain of science.
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"An error-checking method that could prove crucial to the development of a practical quantum computer has been developed by US researchers."
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Friday, June 09, 2006
Einstein predicted that the most extreme objects and events in the Universe should generate gravity waves, and distort space around them. A new experiment called Laser Interferometer Gravitational Wave Observatory (or LIGO) could make the first detection of these gravity waves.
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Dive into the world of time travel. This article looks at several different paradoxes, as well as models and potential methods of time travel.
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Thursday, June 08, 2006
In a process called quark de-confinement a normal neutron could turn into a quark star. During the birthing process, massive amounts of energy would be released, producing a quark-nova - a theoretical implosion could help scientists understand certain massive energy bursts in the universe that can be observed but not explained.
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Tuesday, June 06, 2006
Physicists and engineers in the US have discovered for the first time that glass can completely return to its original state after being bombarded with high-energy electrons. The result shows that the glassy state can be extremely stable thermodynamically, contrary to what was previously thought.
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We react naturally to the signals our brains send out to our bodies. Science has long been able to listen into the signals the brain sends, but is just now learning to turn those signals into meaningful action. The result is restoring movement and speech to the disabled.
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The "Pioneer Anomaly," sparked an array of possible explanations, ranging from dark matter to spacecraft equipment to - most provocative of all - a new physics. "More data" is what scientists need to solve the mystery, and more data is what they now possess, thanks to Planetary Society members.
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Monday, June 05, 2006
Researchers develop a quantum nano-mechanical system that could measure the spin of a single molecule and perhaps be part of solid-state quantum computer. Their paper on the subject, “Spin-detection in a quantum electromechanical shuttle system,” appears in the May issue of the New Journal of Physics.
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A scientist explains why the layer of the sun called the corona, is the hottest layer even though it is the farthest from the suns core.
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David Thomson and Jim Bourassa of the Quantum AetherDynamics Institute (QADI) released a new theory which mathematically predicts and explains the measured values of physics with striking precision. Their Aether Physics Model includes the "Holy Grail" of physics sought by Albert Einstein; the Unified Force Theory.
read more | digg story | mirror | cranks
read more | digg story | mirror | cranks
Sunday, June 04, 2006
In the game of Quantum Soccer, the aim is to shape the wave function of a quantum-mechanical “ball” so that the probability of it being inside one of the goals rises above a set threshold. This is achieved by using the motion of the players to alter the energy spectrum of the wave function: when a player moves across the field, the energy that this action provides (or absorbs) enables transitions between certain modes of the wave function. The pairs of modes involved depend on the player's velocity; the exact rules are spelt out in the mathematical details, but it's easy to experiment using trial and error.
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Saturday, June 03, 2006
Superman can't see through lead with his x-ray vision, but if he could see with neutrons he'd do better. Neutrons can penetrate dense materials, and in the 2 June PRL, researchers describe a simple, 3-D imaging technique that does not require a high-quality neutron beam.
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