The Daily Croissant - Filed under 'Science'

Single-atom transistor is 'perfect'
- 1 Mar 2012
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- Film Shorts March 01 2012 Nanotechnology Science Transistors
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In a remarkable feat of micro-engineering, UNSW physicists have created a working transistor consisting of a single atom placed precisely in a silicon crystal.

This is a single-atom transistor: 3D perspective scanning tunnelling microscope image of a hydrogenated silicon surface. Phosphorus will incorporate in the red shaded regions selectively desorbed with a STM tip to form electrical leads for a single phosphorus atom patterned precisely in the center. Credit: ARC Centre for Quantum Computation and Communication, at UNSW.

via physorg.com
Powers of Minus Ten Walkthrough
- 25 Feb 2012
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- Exploration February 25 2012 Film Shorts Scale Science
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Powers of Minus Ten

"See what human skin looks at the molecular level! Zoom into the hand, discovering the skin at the organ, tissue, cellular and molecular level. Learn basic concepts in biology, exploring the parts of the cell and the different stages of the cell cycle! Also explore DNA replication, transcription and translation and how they relate to the cell cycle."

via vimeo.com
10-year-old Clara Lazen Discovers a New Explosive : Tetranitratoxycarbon
- 9 Feb 2012
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- Children Discoveries Explosives February 09 2012 Science
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"For Clara Lazen, 10, a classroom assignment turned into a scientific finding. As Humbolt State University Chemistry Professor Robert Zoellner confirmed, the fifth-grader's curiosity led to a new molecule, and her first mention in a scientific journal."

via now.humboldt.edu
Brainwaves into Speech
- 7 Feb 2012
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- Brainwaves February 07 2012 Reconstruction Science Speech
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Researchers have demonstrated a striking method to reconstruct words, based on the brain waves of patients thinking of those words.

The technique may one day make it possible to communicate with patients who are unable to talk.

Read More at Science decodes 'internal voices'

via bbc.co.uk
Public Library of Science (PLoS)
- 8 Jan 2012
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- January 08 2012 Libraries Open Source Public Science
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Public Library of Science (PLoS) is a nonprofit publisher, membership, and advocacy organization with a mission to accelerate progress in science and medicine by leading a transformation in research communication.

via plos.org
Life-Changing Nobel Chemistry Breakthroughs
- 13 Oct 2011
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- 12October11 Breakthroughs Chemistry Nobel Prize Science
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Quasicrystals : "Forbidden Symmetry"

"Resembling mosaic tile, this atomic model shows a type of quasicrystal, a material whose atoms display a regular but nonrepeating pattern—once thought impossible in crystals.

The discovery of quasicrystals earned Israeli scientist Daniel Shechtman the 2011 Nobel Prize in Chemistry Wednesday—and joins the list of Nobel-winning chemical discoveries with the potential to change the way we live."

more via news.nationalgeographic.com
Top 10 Science Hoaxes
- 30 Sep 2011
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- 29September11 Hoax Science
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"The Nacirema were supposedly a tribe of people living in North America, as described by Horace Miner in hisÂ anthropological paper, published in 1956.

The tribe Miner described had many odd rituals including "scraping and lacerating the surface of the face with a sharp instrument" and another ritual that "consists of inserting a small bundle of hog hairs into the mouth, along with certain magical powders, and then moving the bundle in a highly formalized series of gestures."

It was actually a satire of everyday American life. "Nacirema" is "American" spelled backward."

read more via science.discovery.com
From a flat mirror, designer light
- 12 Sep 2011
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- 11September11 Light Nanotechnology Photo Manipulation Science
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Electron micrograph of an array of gold antennas on a silicon surface. The array is created by repeating the sequence in yellow across the entire surface. Each antenna has a thickness of 50 nanometers (50 billionths of a meter). The scale bar is in microns, its length slightly shorter than a ten-thousandth of an inch. Image courtesy of Nanfang Yu.

An array of nanoscale resonators, much thinner than a wavelength, creates a constant gradient across the surface of the silicon. In this visualization, the light ray hits the surface perpendicularly, from below. The resonators on the left hold the energy slightly longer than those on the right, so the wavefront (red line) propagates at an angle. Without the array, it would be parallel to the surface. Image courtesy of Nanfang Yu.

06 September 2011

Exploiting a novel technique called phase discontinuity, researchers at the Harvard School of Engineering and Applied Sciences (SEAS) have induced light rays to behave in a way that defies the centuries-old laws of reflection and refraction.

"By incorporating a gradient of phase discontinuities across the interface, the laws of reflection and refraction become designer laws, and a panoply of new phenomena appear," says Zeno Gaburro, a visiting scholar in Capasso's group who was co-principal investigator for this work. "The reflected beam can bounce backward instead of forward. You can create negative refraction. There is a new angle of total internal reflection."
Moreover, the frequency (color), amplitude (brightness), and polarization of the light can also be controlled, meaning that the output is in essence a designer beam.
The researchers have already succeeded at producing a vortex beam (a helical, corkscrew-shaped stream of light) from a flat surface. They also envision flat lenses that could focus an image without aberrations.

via domainb.com
Everyday Radioactivity : A Mr. Wizard Film
- 12 Sep 2011
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- 11September11 Film Shorts Radioactivity Science
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Bully Says Comics Oughta Be Fun !

A Mr. Wizard film. Introduces the viewer to three types of radiation ;
Alpha, Beta, Gamma. Shows operation of vintage geiger counters.
Scintillation counter coupled with multi-channel analyzer (Huge Tube
Unit, 1960's?). Shows in-depth theory of gamma energy measurement.

via archive.org
The Science and Mathematics of Sound, Frequency, and Pitch
- 1 Sep 2011
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- 31August11 Frequency Mathematics Pitsh Science Sound Youtube music
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via youtube.com
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