|
| ©Karen Teramura (UH IfA) |
| The magnetic field of the sun-like star tau Bootis has flipped its north and south poles, the first time this has been observed in a star other than our sun. The shortened cycle of this event may be due to interactions with its nearby massive planet. |
Science & Technology
An international group of astronomers that includes the University of Hawaii's Evgenya Shkolnik reported today that they have discovered that the sun-like star tau Bootis flipped its magnetic field from north to south sometime during the last year.
Researchers at the University of Illinois helped lead a collaborative effort to uncover a completely new treatment strategy for serious Staphylococcus aureus ("Staph") infections. The research, published Feb. 14 online in Science, comes at a time when strains of antibiotic-resistant Staph (known as MRSA, for methicillin-resistant S. aureus) are spreading in epidemic proportions in hospital and community settings.
|
| ©Michael Hudock |
| U. of I. graduate student Fenglin Yin worked with Oldfield on the study. |
MIT physicists have taken a step toward understanding the puzzling nature of high-temperature superconductors, materials that conduct electricity with no resistance at temperatures well above absolute zero.
If superconductors could be made to work at temperatures as high as room temperature, they could have potentially limitless applications. But first, scientists need to learn much more about how such materials work.
Using a new method, the MIT team made a surprising discovery that may overturn theories about the state of matter in which superconducting materials exist just before they start to superconduct.
If superconductors could be made to work at temperatures as high as room temperature, they could have potentially limitless applications. But first, scientists need to learn much more about how such materials work.
Using a new method, the MIT team made a surprising discovery that may overturn theories about the state of matter in which superconducting materials exist just before they start to superconduct.
|
| ©Kamalesh Chatterjee |
| In this topographic image of a superconductor, some of the superconductor's atoms have been replaced with lead atoms. |
The Royal Astronomical Society has talked of the "deep pessimism and anger" caused by funding cuts that it says will jeopardise university physics.
The recently established Science and Technology Facilities Council, STFC, has abandoned involvement in a telescope, high-energy gamma-ray astronomy and ground-based studies of the Sun's effect on the Earth amid a range of budget slashing that has been caused by an £80 million shortfall.
The recently established Science and Technology Facilities Council, STFC, has abandoned involvement in a telescope, high-energy gamma-ray astronomy and ground-based studies of the Sun's effect on the Earth amid a range of budget slashing that has been caused by an £80 million shortfall.
Roger Highfield talks to the British scientists who have found a way to make microscopic objects vanish
It sounds like magic: walls, curtains, even dresses could be rendered transparent by bathing them in a specially crafted beam of light. Rescuers could use the beam to peer through rubble after an earthquake, while doctors could gaze at a damaged lung after making a patient's skin and ribs vanish.
|
| ©Unknown |
| Quantum conjurers from Imperial College London: Dr Mark Frogley and Prof Chris Phillips |
It sounds like magic: walls, curtains, even dresses could be rendered transparent by bathing them in a specially crafted beam of light. Rescuers could use the beam to peer through rubble after an earthquake, while doctors could gaze at a damaged lung after making a patient's skin and ribs vanish.
It goes through walls, but slows to a standstill in ultra-cold gases. It carries electronic information for radios and TVs, but destroys genetic information in cells. It bends around buildings and squeezes through pinholes, but ricochets off tiny electrons.
It's light. And although we know it primarily as the opposite of darkness, most of light is not visible to our eyes. From low energy radio waves to high energy gamma rays, light zips around us, bounces off us, and sometimes goes through us.
It's light. And although we know it primarily as the opposite of darkness, most of light is not visible to our eyes. From low energy radio waves to high energy gamma rays, light zips around us, bounces off us, and sometimes goes through us.
Each Monday, this column turns a page in history to explore the discoveries, events and people that continue to affect the history being made today.
Humans had been speaking for a couple hundred thousand years before they got the inspiration or nerve to mark their ideas down for posterity.
But when a Mesopotamian people called the Sumerians finally did scratch out a few bookkeeping symbols on clay tablets 5,000 years ago, they unknowingly started a whole new era in history we call, well ... history.
Comment: It should be noted that female scribes were very common. According to the book "When God Was a Woman", by Merlin Stone:
Humans had been speaking for a couple hundred thousand years before they got the inspiration or nerve to mark their ideas down for posterity.
But when a Mesopotamian people called the Sumerians finally did scratch out a few bookkeeping symbols on clay tablets 5,000 years ago, they unknowingly started a whole new era in history we call, well ... history.
Comment: It should be noted that female scribes were very common. According to the book "When God Was a Woman", by Merlin Stone:
"The Epic of Gilgamesh reveals that the official scribe of the Sumerian heaven was a woman, while the initial invention of writing was credited to a goddess."
Kids of any age love to read fairy tales because the storyline never limits the possibility that anything could happen. Curses, spells, and handsome princes reign in worlds beyond the reader's imagination.
But are the most magical moments from some of our favorite stories actually possible? Basic physical principles and recent scientific research suggest that what readers might mistake for fantasies and exaggeration could be rooted in reality.
So suspend your imagination for a moment, and look at the following fairy tales as a hard-core scientist might.
But are the most magical moments from some of our favorite stories actually possible? Basic physical principles and recent scientific research suggest that what readers might mistake for fantasies and exaggeration could be rooted in reality.
So suspend your imagination for a moment, and look at the following fairy tales as a hard-core scientist might.
Good news for those who hate washing socks, are worried about hygiene or resent spending money on dry cleaning: self cleaning forms of wool and silk have been developed with the help of nanotechnology.
Wool socks, skirts and silk ties may soon clean themselves of smells and stains in the sunshine, researchers in Australia and China suggest.
Wool socks, skirts and silk ties may soon clean themselves of smells and stains in the sunshine, researchers in Australia and China suggest.
|
| ©Unknown |
| Red wine stained wool with no treatment (top), a stain-treating agent (middle) and nano particle coating (bottom) |
Gravitational waves are distortions or the warping of the very fabric of space-time, which Einstein described as different aspects of reality itself. As a fabric, space-time can be measured either in terms of distance or time.
However, large amounts of mass or energy think here of the incredibly dense core of an exploded star known as a neutron star can curve space-time, resulting in the warping of the fabric which can be observed as gravitational shifts.
However, large amounts of mass or energy think here of the incredibly dense core of an exploded star known as a neutron star can curve space-time, resulting in the warping of the fabric which can be observed as gravitational shifts.
Comment: In order to have a better understanding in the issues involved, and how they are seen by the scientists themselves - see the Comments on the BBC News story "UK physics has a 'brighter future'"