USC scientists who track Internet outages throughout the world noted a spike in outages due to Hurricane Sandy, with almost twice as much of the Internet down in the U.S. as usual.
Previous research by this team has shown that on any given day, about 0.3 percent of the Internet is down for one reason or another. Just before Hurricane Sandy hit the East Coast, that number was around 0.2 percent in the U.S. (pretty good, by global standards) – but once the storm made landfall, it jumped to 0.43 percent and took about four days to return to normal, according to a new report by scientists at the Information Sciences Institute (ISI) at the USC Viterbi School of Engineering.
"On a national scale, the amount of outage is small, showing how robust the Internet is. However, this significant increase in outages shows the large impact Sandy had on our national infrastructure," said John Heidemann, who led the team that tracked an analyzed the data. Heidemann is a research professor of computer science and project leader in the Computer Networks Division of ISI.
Heidemann worked with graduate student Lin Quan and research staff member Yuri Pradkin, both also from ISI, sending tiny packets of data known as "pings" to networks and waiting for "echoes," or responses. Though some networks—those with a firewall—will not respond to pings, this method has been shown to provide a statistically reasonable picture of when parts of the Internet are active or down.
The team was also able to pinpoint where the outages were occurring, and noted a spike in outages in New Jersey and New York after Sandy made landfall.
Their research was published as a technical report on the ISI webpage on December 17, and the raw data will be made available to other scientists who would like to analyze it.
The data is not yet specific enough to say exactly how many individuals were affected by the outage, but does provide solid information about the scale and location of outages, which could inform Internet service providers on how best to allocate resources to respond to natural disasters.
"Our work measures the virtual world to peer into the physical," said Heidemann. "We are working to improve the coverage of our techniques to provide a nearly real-time view of outages across the entire Internet. We hope that our approach can help first responders quickly understand the scope of evolving natural disasters."
This research was funded by the U.S. Department of Homeland Security Science and Technology Directorate.
Robert Perkins | EurekAlert!
Multi-year study finds 'hotspots' of ammonia over world's major agricultural areas
17.03.2017 | University of Maryland
Diabetes Drug May Improve Bone Fat-induced Defects of Fracture Healing
17.03.2017 | Deutsches Institut für Ernährungsforschung Potsdam-Rehbrücke
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
29.03.2017 | Materials Sciences
29.03.2017 | Physics and Astronomy
29.03.2017 | Earth Sciences