Tag Archives: interesting research

Scientists Demonstrate Ultra-Fast Magnetite Electrical Switch

Posted on by

However, there’s a slight hitch to be overcome before fabbing magnetite computer chips is possible. To lock an electrical charge in place in the material, it has to be chilled to minus 190 degrees Celsius.

Kukreja said the next objective for the team will be to try out electrical switching with “more complex materials and room-temperature applications” through new experiments which “aim to identify exotic compounds and test new techniques to induce the switching and tap into other properties that are superior to modern-day silicon transistors.”

via Scientists Demonstrate Ultra-Fast Magnetite Electrical Switch | News & Opinion | PCMag.com.

TCP ex Machina

Posted on by

Remy is a computer program that figures out how computers can best cooperate to share a network.

Remy creates end-to-end congestion-control algorithms that plug into the Transmission Control Protocol (TCP). These computer-generated algorithms can achieve higher performance and greater fairness than the most sophisticated human-designed schemes.

via TCP ex Machina.

MIT researchers can see through walls using ‘Wi-Vi’

Posted on by

Every time a Wi-Fi signal is reflected off an object, the shape and makeup of that object affects the signal that comes back. But when Wi-Fi hits a wall, most of the signal gets reflected off the wall and only a faint bit of it reflects off the people on the other side.

To get around this, Wi-Vi transmits two Wi-Fi signals, one of which is the inverse of the other. When one signal hits a stationary object, the other cancels it out. But because of the way the signals are encoded, they don’t cancel each other out for moving objects. That makes the reflections from a moving person visible despite the wall between that person and the Wi-Vi device. Wi-Vi can translate those faint reflections into a real-time display of the person’s movements.

via MIT researchers can see through walls using ‘Wi-Vi’ | ITworld.

Roman Seawater Concrete Holds the Secret to Cutting Carbon Emissions

Posted on by

The Romans made concrete by mixing lime and volcanic rock. For underwater structures, lime and volcanic ash were mixed to form mortar, and this mortar and volcanic tuff were packed into wooden forms. The seawater instantly triggered a hot chemical reaction. The lime was hydrated – incorporating water molecules into its structure – and reacted with the ash to cement the whole mixture together.

via Roman Seawater Concrete Holds the Secret to Cutting Carbon Emissions « Berkeley Lab News Center.

This seems like an amazing discovery.

Their analyses showed that the Roman recipe needed less than 10 percent lime by weight, made at two-thirds or less the temperature required by Portland cement. Lime reacting with aluminum-rich pozzolan ash and seawater formed highly stable C‑A-S-H and Al-tobermorite, insuring strength and longevity. Both the materials and the way the Romans used them hold lessons for the future.

The British ‘Atlantis’ is mapped in detail

Posted on by

The camera uses high frequency sound and acoustic lenses to refract sound waves and create film footage without light. The technology is usually reserved for creating a fly-by of sunken ships, but it has now picked up the wreckage of the former trading hub in astonishing detail. In addition, old naval navigation charts helped in the tracking and mapping of where the former coastline stood.

via The British ‘Atlantis’ is mapped in detail | Ars Technica.

Meanwhile in Brazil, the discovery of a large lump of granite rock 1,500km (932 miles) off the coast of Rio de Janeiro has led to claims that the real Atlantis has been discovered.

Internet Census 2012

Posted on by

Abstract While playing around with the Nmap Scripting Engine (NSE) we discovered an amazing number of open embedded devices on the Internet. Many of them are based on Linux and allow login to standard BusyBox with empty or default credentials. We used these devices to build a distributed port scanner to scan all IPv4 addresses. These scans include service probes for the most common ports, ICMP ping, reverse DNS and SYN scans. We analyzed some of the data to get an estimation of the IP address usage.

All data gathered during our research is released into the public domain for further study.

via Internet Census 2012.

Turning a standard LCD monitor into touchscreen with a $5 wall-mounted sensor

Posted on by

Now, by plugging an EMI sensor into any wall socket, you can read your house’s EM signature — and if you continue to listen, you can detect changes in the signature. Obvious changes occur when a device is switched on or off, but it also turns out that simply moving your hand close to an LCD monitor also alters your house’s EM signature. It might sound a bit unbelievable, that a single finger moving towards an LCD monitor can be detected by a sensor at the other end of the house, but that’s exactly what the University of Washington researchers have accomplished.

via Turning a standard LCD monitor into touchscreen with a $5 wall-mounted sensor | ExtremeTech.

Superstorm Sandy Shook the Earth

Posted on by

Storm-induced seismic vibes aren’t a newly recognized phenomenon. In 2005, ground motions triggered by Hurricane Katrina were picked up by seismometers in California. And even storms that remain far from land can trigger ground motions, Sufri and Koper note.

Because the strongest ground motions are typically created at or near a storm, researchers can track its progress using seismic data alone. That offers opportunities for scientists to delve through old data sets—especially those from the presatellite era—to look for signs of storms that might have been missed by earthbound observers, or to better estimate their paths and intensities, Sufri says.

via Superstorm Sandy Shook the Earth – ScienceNOW.

It amazes me how sensitive those seisometers must be.

Scientists Discover New Atomic Technique to Charge Memory Chips

Posted on by

Once the oxide materials, which are innately insulating, are transformed into a conducting state, the IBM experiments showed that the materials maintain a stable metallic state even when power to the device is removed. This non-volatile property means that chips using devices that operate using this novel phenomenon could be used to store and transport data in a more efficient, event-driven manner instead of requiring the state of the devices to be maintained by constant electrical currents.

via IBM News room – 2013-03-21 Made in IBM Labs: Scientists Discover New Atomic Technique to Charge Memory Chips – United States.