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Columbia University

— Science

New dimensions of quantum information added through hyperentanglement

By - July 1, 2015 1 Picture

In quantum cryptography, encoding entangled photons with particular spin states is a technique that ensures data transmitted over fiber networks arrives at its destination without being intercepted or changed. However, as each entangled pair is usually only capable of being encoded with one state (generally the direction of its polarization), the amount of data carried is limited to just one quantum bit per photon. To address this limitation, researchers have now devised a way to "hyperentangle" photons that they say can increase the amount of data carried by a photon pair by as much as 32 times.

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— Science

Miniature car runs only on the power of evaporating water

By - June 17, 2015 5 Pictures

Researchers have discovered an unlikely source of renewable energy, the naturally-occurring cycle that is water evaporation. Scientists at New York's Columbia University replicated this process in the laboratory and harnessed its energy to power tiny machines, one of which was a moving, miniature car. The team says the technology could potentially to be scaled up to one day draw power from huge resting bodies of water such as bays and reservoirs.

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— Science

Graphene used to create world's thinnest light bulb

By - June 15, 2015 3 Pictures
Over 130 years ago, Thomas Edison used carbon as the conducting filament in the very first commercial light-bulb. Now a team of scientists and engineers have used that very same element, in its perfectly crystalline form of graphene, to create what they claim to be the world's thinnest light-bulb. Even though just one atom thick and covering an area almost too small to see unaided, the new device is so bright that the light it produces can easily be seen with the naked eye. Read More
— Digital Cameras

Video camera could record indefinitely, powered only by light from the image it captures

By - April 16, 2015 3 Pictures
By using the light reflected from the object being recorded, researchers claim to have created a prototype video camera that could potentially record indefinitely under its own power. By incorporating energy-harvesting photodiodes within the pixels of its image-capture array, the new camera produces self-sustaining electrical power while simultaneously capturing video footage. Read More
— Telecommunications

Full-duplex radio integrated circuit could double radio frequency data capacity

By - March 17, 2015 1 Picture
Full-duplex radio communication usually involves transmitters and receivers operating at different frequencies. Simultaneous transmission and reception on the same frequency is the Holy Grail for researchers, but has proved difficult to achieve. Those that have been built have proven complex and bulky, but to be commercially useful in the ever-shrinking world of communications technology, miniaturization is key. To this end, engineers at Columbia University (CU) claim to have created a world-first, full-duplex radio transceiver, all on one miniature integrated circuit. Read More
— Space

Researchers theorize two mechanisms that prevent prolific star creation in galaxy clusters

By - March 11, 2015 1 Picture
For a long time, scientists have been searching for an answer as to how galaxy clusters regulate the number of stars they create. Given that the amount of interstellar gas used to create the stellar giants exists in such abundance, this theoretically allows for the creation of many times the current number of stars. A team of researchers from MIT, Columbia University and Michigan State University believe they have found the answer. Read More
— Medical

Drug-delivering nano "drones" to help prevent heart attacks

By - March 2, 2015 2 Pictures
Scientists have developed targeted, biodegradable nano "drones" to deliver anti-inflammatory drugs that heal and stabilize arterial plaque in mice. Their work could pave the way for more effective prevention of heart attack and stroke in humans caused by atherosclerosis, in which artery walls thicken and suffer reduced plasticity due to an accumulation of white blood cells. Read More
— Medical

Smartphone dongle detects HIV and syphilis markers in 15 minutes

By - February 4, 2015 3 Pictures
That smartphones have evolved to be capable of much more than making and receiving calls won't be news to many, but work being done to refashion them as medical diagnostics tools is proving to be a very promising area of mobile innovation. The latest big-picture idea to emerge in this area is a smartphone dongle capable of detecting three infectious disease markers within 15 minutes, requiring only a finger prick of blood. Read More
— Science

"SCAPE" microscope offers faster and simpler imaging of freely moving samples

By - January 20, 2015 2 Pictures
Elizabeth Hillman, associate professor of biomedical engineering at Columbia University Medical Center (CUMC), has developed a new 3D microscope prototype dubbed "SCAPE" (Swept Confocally Aligned Planar Excitation Microscopy), which requires no mounting of samples or other special preparation, and is capable of imaging freely moving living samples at speeds 10 to 100 times faster than current laser-scanning microscopes. Read More
— Health and Wellbeing

Can’t find your car keys? Cocoa flavanols may help age-related memory decline

By - November 2, 2014 3 Pictures
Do you forget where you left your keys or parked the car, or have difficulty remembering the names of people you’ve just met? The good news is that chocolate – or more specifically, naturally occurring compounds in cocoa called flavanols – can reverse age-related memory decline in healthy older adults, according to a Columbia University Medical Center (CUMC) study. Read More
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