Cool video from THOR Photomedicine showing cats, dogs and other pets treated with laser LLLT low level cold laser light therapy
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There are good microphones, and there are bad microphones, but pretty much all of them are limited by the nature of the technology — specifically, the diaphragm that moves in response to air. The structure of that diaphragm will affect the sound that’s recorded, even if that influence is minute. There’s simply no way around it.
Laser-Accurate microphone captures \’pure sound\’
Or is there? David Schwartz at the Rochester Institute of Technology says his Laser-Accurate micorphone is capable of recording “pure sound.” Instead of conventional transducers, Schwartz’s mike uses lasers to scan an air chamber filled with microscopic particles (read: smoke). When the particles move in response to sound, the laser detects the motion without disturbing the air (at least not in any acoustic way), so the vibration — and thus the recording — should be as close to acoustically perfect as possible. In theory.
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EVER since Diana, Princess of Wales, was snapped in an amorous clinch with Dodi Fayed in a yacht off the French Riviera, celebrities have been seeking ways to enjoy their holidays while avoiding the glare of the paparazzi.
Even Helen Mirren’s advancing years failed to stave off photographers who caught her in a bikini in Italy last year.
Now Roman Abramovich, the Russian oligarch, appears to have come up with a novel solution to protect his privacy.
In a move that could eventually be copied by all discerning billionaires, Abramovich has installed an anti-paparazzi shield on his newest vessel, the world’s biggest and most expensive private yacht.
The high-tech system on Eclipse, a mega-yacht measuring up to 557ft, relies on lasers to block any digital camera lenses nearby.
The boat, which has reportedly more than doubled in cost to £724m since it was commissioned three years ago, glided out of port in Hamburg last week on its maiden voyage. On board were 150 engineers and maritime experts who will put it through its paces over 10 days. One witness described the boat as “a great white castle on water”.
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Besiktas 0 Manchester United 1
If Sir Alex Ferguson wanted a place to come to think, analyse and try out his new side on Europe then this was the last place on earth to be. The bear pit of the Inonu Stadium rocked and bounced and whistled and when none of that worked, the fans just flashed laser pens in the eyes of Ferguson’s players. It was a potent sign of how every side in the world want blood when Manchester United are in town and the visitors’ victory earned 13 minutes from time – Paul Scholes leaping to head home after Nani’s deftly arced shot was parried into the midfielder’s path – represented an admirable night’s work.
The win was merited, too, but that thinking time is certainly still needed. Ferguson chopped and changed his attacking options as the night wore on and as the noise gravitated from the spectacular to the uncomfortable he was reminded of the dangers of playing Wayne Rooney alone up front.
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Last season’s losing finalists Manchester United opened their Champions League campaign with a 1-0 win away to Besiktas, while Wolfsburg beat CSKA Moscow 3-1 in Tuesday night’s other Group B clash.
United made the daunting trip to Istanbul without England defender Rio Ferdinand, who is believed to have a groin problem following his comeback last weekend, and started with only one striker in Wayne Rooney.
Once again they missed the creativity of the departed Cristiano Ronaldo, who scored twice on his European debut for Real Madrid in Zurich on the same night, and needed a 77th minute winner from Paul Scholes to take the points.
The veteran midfielder, who will miss this weekend’s Manchester derby due to his red card in Sunday’s 3-1 win over Tottenham, headed home after Nani’s shot was only parried by Besiktas goalkeeper Hakan Arikan.
Summer signing Michael Owen should have doubled the lead, but the substitute poked wide from close range.
United manager Alex Ferguson revealed after the match that his players had been targeted with a laser light by at least one of the Turkish side’s fans.
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Laser beams are best known as weapons in science fiction and as heating and cutting tools in science fact. But a new study has flip-flopped conventional physics to show lasers in a whole new light.
In a new technique, Martin Weitz and Ulrich Vogl of the University of Bonn in Germany used a laser to bring the temperature of dense rubidium gas far below the normal point at which the gas becomes a solid.
Previous research had been able to use lasers to quickly “supercool” only very diluted gases.
But “here’s a case where you shine a laser on something and it actually cools down, and not just a handful of atoms, but a macroscopic object,” said Trey Porto, a physicist with the National Institute of Standards and Technology’s laser-cooling group who was not involved in the new work.
The process could be used to create fascinating new states of matter, the study authors say. (more…)
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US Navy boffins say they have developed a method which could allow aircraft to communicate with submarines using frickin’ laser beams.
Dr Ted Jones of the Naval Research Laboratory has developed methods of generating acoustic effects in water by firing laser pulses into it. According to the lab:
Optical properties of water can be manipulated with very intense laser light to act like a focusing lens… In addition, the slightly different colors of the laser can be arranged so that the pulse also compresses in time as it travels through water, further concentrating the light. Controlled underwater compression of optical pulses can be attained.
Tomorrow’s lasers may come with a bit of bling, thanks to a new technology that uses man-made diamonds to enhance the power and capabilities of lasers. Researchers in Australia have now demonstrated the first laser built with diamonds that has comparable efficiency to lasers built with other materials.
This “Raman” laser has applications that range from defense technologies and trace gas detectors to medical devices and satellite mapping of greenhouse gases. The special properties of diamonds offer a stepping stone to more powerful lasers that can be optimized to produce laser light colors currently unavailable to existing technologies.
Richard Mildren of Macquarie University in Sydney, New South Wales, Australia and Alexander Sabella of the Defence Science and Technology Organisation in Edinburgh, South Australia developed the device, described in the current issue of the Optical Society (OSA) journal Optics Letters.
“Diamond is quite a bizarre material with unique and extreme properties,” says Mildren. “Single crystal diamond is very new on the scene as an optical and laser material.”
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A hybrid protein has been created that causes mouse cells to move in response to laser light. Such cells can be trained to follow a light beam or stop on command.
This is the first time researchers have been able to import a light-controlled “on-off switch” from plants into a mammalian cell to instantly control a variety of cell functions, the researchers said. As such, it offers both a powerful new tool in cancer and cardiovascular research, and the potential to ultimately control complex processes such as nerve growth.
“This is a powerful tool for cell biology and cancer research,” said Wendell Lim, a professor in the University of California, San Francisco (UCSF) department of cellular and molecular pharmacology and a Howard Hughes Medical Institute researcher.
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The near-infrared laser pathway into the cell culture plate, traced by visible laser for photo.
Researchers at UC Santa Barbara have developed a new way to deliver drugs into cancer cells by exposing them briefly to a non-harmful laser. Their results are published in a recent article in ACS Nano, a journal of the American Chemical Society.
“This entirely novel tool will allow biologists to investigate how genes function by providing them with temporal and spatial control over when a gene is turned on or off,” explained Norbert Reich, senior author and a professor in the Department of Chemistry and Biochemistry at UCSB. “In a nutshell, what we describe is the ability to control genes in cells –– and we are working on doing this in animals –– simply by briefly exposing them to a non-harmful laser.”
The scientists used cancer cells from mice, and grew them in culture. They then introduced gold nanoshells, with a peptide-lipid coating, that encapsulated “silencing ribonucleic acid” (siRNA), which was the drug that was taken up by the cells. Next, they exposed the cells to a non-harmful infrared laser.
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