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Skeptical Debunker

Carbon Nanotube Speakers Could Be Powered by Lasers, Transform Noisy Spaces into Peacef... - 6 views

  • “Nanotubes assemblies of various types are black and highly conductive,” said Dr. Mikhail Kozlov, a research scientist and the study’s lead author. “Their dark, conductive surface can be effectively heated with laser light or electricity to induce variations in the pressure of the air around the nanotubes — which we perceive as sound. It’s called the photo- or thermo-acoustic effect, and it’s the same principle Alexander Graham Bell used to produce sound on the first telephone.” With laser excitation, no electrical contact with the nanotube speaker is required, making the speakers wireless. “Speakers made with carbon nanotube sheets are extremely thin, light and almost transparent,” Kozlov said. “They have no moving parts and can be attached to any surface, which makes the surface acoustically active. They can be concealed in television and computer screens, apartment walls, or in the windows of buildings and cars. The almost invisible strands form films that can ‘talk.’” In addition to filling a room with sound from invisible speakers, nanotube speakers could easily cancel sound from the noisiest neighbor or dim the roar of traffic rushing past a neighborhood, using the same principles as current sound-canceling technologies. “The sound generation by nanotube sheets can help to achieve this effect on very large scales,” Kozlov said.
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    A UT Dallas team's study published in the Journal of Applied Physics expands the extraordinary capabilities of nanotechnology to include laser-powered acoustic speakers made from assemblies of carbon nanotubes.
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    Amazing work being done with nanotechnology!
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    http://www.nlptrainingcoaching.com Neuro Linguistic Programming (NLP) Neuro Linguistic Programming (NLP) is the most proven and systematic way to understand, how your subconscious is presently programed for current level of success.
thinkahol *

TED Blog | The 4 ways sound affects us: Julian Treasure on TED.com - 0 views

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    Playing sound effects both pleasant and awful, Julian Treasure shows how sound affects us in four significant ways. Listen carefully for a shocking fact about noisy open-plan offices. (Recorded at TEDGlobal University, July 2009, Oxford, UK. Duration: 5:47)
Janos Haits

Encyclopedia of Puget Sound - 0 views

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    Puget Sound hosts more than 100 species of seabirds, 200 species of fish, 15 marine mammal species, hundreds of plant species, and thousands of invertebrate species. These species do not exist in isolation, but rather interact with each other in a variety of ways: they eat and are eaten by each other;
Erich Feldmeier

In Flies' Innards, Vital Clues to Biodiversity - NYTimes.com - 0 views

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    "How many mammal species live in the forest? It sounds like a simple question, but the actual distributions of shy, small or rare mammals are often murky, confounding conservationists seeking to protect them. Yet a paper published online on Tuesday in the journal Molecular Ecology explores a new way to track biodiversity: by capturing flies that feed on carcasses. The flies' stomachs offer DNA diaries of their recent meals, giving scientists clues to which animals live and die in the forest. "The animals are there, but you just don't see them," said Fabian Leendertz, a wildlife epidemiologist at the Robert Koch Institute in Berlin and an author of the paper. "Those flies will find them and will tell us what is there"
Janos Haits

ML: Macaulay Library - 0 views

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    The Macaulay Library is the world's largest and oldest scientific archive of biodiversity audio and video recordings. Learn more
Erich Feldmeier

Infusion of pseudo-poo cures gut infections in two women - Phenomena: Not Exactly Rocke... - 0 views

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    "People swap bacteria all the time-through sneezes and coughs, through hugs and sex, or through touching the same surfaces. Then there are people who swap bacteria because a doctor deliberately transplants faeces from one into the other. This isn't a bizarre medical perversion. It's usually a life-saving gambit. Faecal transplants-which are exactly what they sound like-are used to treat people who suffer from intense diarrhoea following rounds of antibiotics. The goal is simple: recalibrate the beneficial bacteria in a person's gut to fight off the ones that are causing them harm."
Janos Haits

Solve For X - 0 views

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    Solve for X is a place where the curious can go to hear and discuss radical technology ideas for solving global problems. Radical in the sense that the solutions could help billions of people. Radical in the sense that the audaciousness of the proposals makes them sound like science fiction.
Janos Haits

Online Etymology Dictionary - 0 views

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    "This is a map of the wheel-ruts of modern English. Etymologies are not definitions; they're explanations of what our words meant and how they sounded 600 or 2,000 years ago."
Erich Feldmeier

@biogarage Ian Seppelt: #microbiome Human faeces pumped through a patient's nose used a... - 0 views

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    "So far the treatment, known as faecal transplant, has been tested only on a drug resistant form of the bowel disease caused by the bacterium clostridium difficile. Antibiotics are unreliable against the superbug, but the transplant is 95% successful, saving patients from constant stomach cramps and chronic diarrhoea. "It sounds radical but it makes a lot of sense," said Seppelt on Thursday at a gathering of more than 4,000 Australasian anaesthetists and surgeons. "Usually patients are sufficiently miserable to go ahead, often using a donation from a relative." Healthy humans have about 100 times more bacteria cells in their gut than their own cells."
Walid Damouny

Pinpoint Precision: Nanowires Deliver Biochemical Payloads to One Cell Among Many - 0 views

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    "(PhysOrg.com) -- Imagine being able to drop a toothpick on the head of one particular person standing among 100,000 people in a stadium. It sounds impossible, yet this degree of precision at the cellular level has been demonstrated by researchers affiliated with the Johns Hopkins University Institute for NanoBioTechnology. Their study was published online in June in Nature Nanotechnology."
thinkahol *

The Biology of Consciousness | WBUR and NPR - On Point with Tom Ashbrook - 0 views

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    "Renegade husband and wife philosophers Pat and Paul Churchland met forty years ago in a college Plato class. Their instincts as philosophers - then and now - run outside the philosophy mainstream. Where most philosophers looked to reason and logic to apprehend the human mind, the Churchlands looked - and look - to science. There is no independent "mind", these two practically say, just the human brain, three pounds of tissue and water, firing away behind all our emotions, beliefs, actions. Consciousness itself, they say, is straight biology, a machine. Once, that sounded esoteric. Now, it's on the frontline of debate over law, soul and life."
David Corking

Wolfram Blog : Is Mathematica for K-12 Education? You Bet! - 0 views

  • let students explore concepts by manipulating an expression—or a graphical representation of an expression—with things like sliders, buttons, and checkboxes. When you wrap the Manipulate command around an existing calculation, Mathematica automatically creates a sophisticated interface that lets you and your students change values and see what happens in real time. It’s truly empowering! Now students can interact with everything from two-dimensional trajectory paths… to Riemann sums… to the phases of the planets… to almost anything else you can imagine. See the Wolfram Demonstrations Project for thousands of free ready-to-use examples.
  • Mathematica for the Classroom for only $49.
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    sounds like good value proprietary science + math software for schools
Walid Damouny

Physicist Proposes Solution to Arrow-of-Time Paradox - 0 views

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    Entropy can decrease, according to a new proposal - but the process would destroy any evidence of its existence, and erase any memory an observer might have of it. It sounds like the plot to a weird sci-fi movie, but the idea has recently been suggested by theoretical physicist Lorenzo Maccone, currently a visiting scientist at MIT, in an attempt to solve a longstanding paradox in physics.
thinkahol *

Foxes zero in on prey via Earth's magnetic field - life - 12 January 2011 - New Scientist - 0 views

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    It sounds like something a guided missile would do. Foxes seem to zero in on prey using Earth's magnetic field. They are the first animal thought to use the field to judge distance rather than just direction.
thinkahol *

Does sexual equality change porn? - Pornography - Salon.com - 0 views

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    In what may feel like a flashback to the porn wars of the '60s, a new study investigates the link between a country's relative gender equality and the degree of female "empowerment" in the X-rated entertainment it consumes. Researchers at the University of Hawaii focused on three countries in particular: Norway, the United States and Japan, which are respectively ranked 1st, 15th and (yikes) 54th on the United Nations' Gender Empowerment Measure (GEM). To simplify their analysis, their library of smut was limited to explicit photographs of women "from mainstream pornographic magazines and Internet websites, as well as from the portfolios of the most popular porn stars from each nation." Then they set out to evaluate each image on both a disempowerment and an empowerment scale, using respective measures like whether the woman is "bound and dominated" by "leashes, collars, gags, or handcuffs" or "whether she has a natural looking body." Their hypothesis was that societies with greater gender equity will consume pornography that has more representations of "empowered women" and less of "disempowered women." It turned out the former was true, but, contradictory as it may sound, the latter was not. "While Norwegian pornography offers a wider variety of body types -- conforming less to a societal ideal that is disempowering to the average woman -- there are still many images that do not promote a healthy respect for women," the researchers explain. In other words, Norwegian porn showed more signs of female empowerment, but X-rated images in all three countries equally depicted women in demeaning positions and scenarios. This, the researchers surmise, "suggests that empowerment and disempowerment within pornography are potentially different constructs." So, gender equality is accompanied by sexual interest in a broader range of beauty types but not a decrease in porn's infantilization of females, use of dominating fetish gear on women or any of the other characteristics th
thinkahol *

How music changes our brains - Salon.com - 2 views

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    Science is becoming increasingly interested in the relationship between sound and the brain. An expert explains
thinkahol *

Cheap, 'safe' drug kills most cancers - health - 17 January 2007 - New Scientist - 2 views

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    It sounds almost too good to be true: a cheap and simple drug that kills almost all cancers by switching off their "immortality". The drug, dichloroacetate (DCA), has already been used for years to treat rare metabolic disorders and so is known to be relatively safe.
Skeptical Debunker

Exotic Antimatter Created on Earth - Yahoo! News - 0 views

  • Among the many particles that resulted from this crash were bizarre objects called anti-hypertritons. Not only are these things antimatter, but they're also what's called strange matter. Where normal atomic nuclei are made of protons and neutrons (which are made of "up" quarks and "down" quarks), strange nuclei also have so-called Lambda particles that contain another flavor of quark called "strange" as well. These Lambda particles orbit around the protons and neutrons. If all that is a little much to straighten out, just think of anti-hypertritons as several kinds of weird. Though they normally don't exist on Earth, these particles may be hiding in the universe in very hot, dense places like the centers of some stars, and most likely were around when the universe was extremely young and energetic, and all the matter was packed into a very small, sweltering space. "This is the first time they've ever been created in a laboratory or a situation where they can be studied," said researcher Carl Gagliardi of Texas A&M University. "We don't have anti-nuclei sitting around on a shelf that we can use to put anti-strangeness into. Only a few anti-nuclei have been observed so far." These particles weren't around for too long, though – in fact, they didn't last long enough to collide with normal matter and annihilate. Instead they just decayed after a fraction of a billionth of a second. "That sounds like a really short time, but in fact on the nuclear clock it's actually a long time," Gagliardi told SPACE.com. "In that fraction of a billionth of a second that Lambda particle has already gone around the nucleus as many times as the Earth has gone around the sun since the solar system was created."
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    Scientists have created a never-before seen type of exotic matter that is thought to have been present at the earliest stages of the universe, right after the Big Bang. The new matter is a particularly weird form of antimatter, which is like a mirror-image of regular matter. Every normal particle is thought to have an antimatter partner, and if the two come into contact, they annihilate. The recent feat of matter-tinkering was accomplished by smashing charged gold atoms at each other at super-high speeds in a particle accelerator called the Relativistic Heavy Ion Collider at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory in Upton, N.Y.
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