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Sophisticated nano-structures assembled with magnets

February 19, 2009

Magnetic and non-magnetic materials have been coaxed to self-assemble in a “ferrofluid” into intricate permanent nanostructures by researchers at Duke University and the University of Massachusetts, raising the possibility of using these structures as basic building blocks for applications such as advanced optics, cloaking devices, data storage, and bioengineering.

Sorenstam’s Got Game, in Reality and Virtually

May 25, 2003

A virtual golf course has been created with the strengths of male and female golfers. It rewards precision, while penalizing shots that are too long or too short, leveling the playing field between men and women.

In a simulated four rounds of golf, golfer Annika Sorenstam was the winner.

Sorting out circulating tumor cells in the blood with sound waves

Could help assess cancer’s spread
August 28, 2014

sorting out

A research team has developed a device that could be used to detect the extremely rare tumor cells that circulate in cancer patients’ blood, helping doctors predict whether a tumor is going to spread.

Developed by researchers from MIT, Pennsylvania State University, and Carnegie Mellon University, the dime-sized device separates out tumor cells from white blood cells by exposing the cells to sound… read more

Sorting out semiconducting and conducting nanotubes

November 21, 2011

Polimer coated nanotubes

A technique to selectively sort semiconducting single-walled carbon nanotubes and conducting nanotubes has been discovered by researchers at Stanford University, University of California-Davis, and the Samsung Advanced Institute of Technology.

When nanotubes are manufactured, semiconducting nanotubes, which work for transistors and solar cells, are mixed with conducting nanotubes, which work for batteries. Mixtures of conducting and semiconducting nanotubes do not carry enough current for wires or battery… read more

Sorting Technique May Boost Nanotube Research

June 27, 2003

German researchers report a simple
electrical technique to divide
semiconducting and metallic nanotubes by using an electric field
to draw the more conductive metallic tubes to an electrode.

According to chemist Richard
Smalley of Rice University, the technique is long overdue and will find immediate use.

The technique is described in a paper published online by Science this week (

Souls of a new machine

November 27, 2006

Intelligence augmentation (IA) is a catch-all term for a wide variety of methods that use actual human beings, with actual human brains, as part of computer programs. The idea is that by having a human deal with the specific parts of a problem that are difficult or impossible for a computer, but trivial for you or me, you can have a program that seems to possess real human intelligence.… read more

Sound bullets could treat cancers and replace ultrasound

April 7, 2010

A group of US scientists has developed an acoustic lens made of a metamaterial that can focus acoustic waves with greater energy than ever before possible to produce “sound bullets” that could find many uses, including effective, nonintrusive sonic scalpels for destroying tumors or kidney stones.

It could also be used to produce near photo-quality images of the inside of the body, but without the radiation risks of X-rays.

Sound imaging: clever acoustics help blind people see the world

July 3, 2009

University of Bristol and University of Laguna researchers have developed a system using video from portable cameras that calculates the distance of obstacles, predicts the movements of people and cars, and generates three-dimensional acoustic maps, compensating for head positioning using a gyroscopic sensor.

Sound waves produce nuclear fusion

July 15, 2005

UPDATE: The bubble bursts

An inexpensive “tabletop” device that uses sound waves to produce nuclear fusion reactions could lead to a new source of clean energy and a host of portable detectors and other applications.

A key component of the experiment was a glass test chamber about the size of two coffee mugs filled with a liquid called deuterated acetone, which contains a form of hydrogen… read more

Sound-blasting chips for on-the-spot forensics

May 26, 2010

By using surface acoustic waves (SAWs) to manipulate biological samples on a “lab-on-a-chip,” rapid, on-the-spot chemical analysis and diagnosis of disease has moved closer to reality.

Sound-cloaking acoustic metamaterials are on the way

April 23, 2012


New materials that have the potential to create acoustically shielded environments may be on the way, Ars Technica reports.

In the latest development, researchers have shown how creating materials that have meandering paths for sound waves can result in a negative acoustic index of refraction.

More importantly, these materials may actually be manufacturable and work for sound waves in air — the stuff we might consider noise.… read more

Sound-detecting hair cells grown in lab

October 28, 2003

Sound-detecting hair cells of the inner ear can be grown in the lab from embryonic stem cells, scientists have shown, creating a possible alternative to cochlear implants for treating deafness.

Sound-system spots early Alzheimer’s in brain waves

April 18, 2007

A computer system that can rival some doctors’ ability to diagnose early-stage Alzheimer’s is being trialled in the US. It analyses a person’s the P300 brain waves response to a number of simple sound-based tests.

Soundless Music Shown to Produce Weird Sensations

September 9, 2003

British scientists have shown in a controlled experiment at a concert that the extreme bass sound known as infrasound produces a range of bizarre effects in people including anxiety, extreme sorrow and chill.

Sounds During Sleep Aid Memory, Study Finds

November 20, 2009

Playing sound cues associated with a picture in a specific location while people slept helped them remember more of what they had learned before they fell sleep, to the point where memories of individual facts were enhanced, scientists at Northwestern University report in the journal Science.

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