Datacenter vending machine serving up various types of network and data cable. Simple but brilliant idea.
“First Evidence for Extraterrestrial Sources of High-Energy Neutrinos” —Reports Antarctica Observatory
Although cosmic rays were discovered 100 years ago, their origin remains one of the most enduring mysteries in physics. Until now. A massive telescope at the IceCube Neutrino Observatory in the Antarctic ice reports the detection of 28 extremely high-energy neutrinos that might have their origin in cosmic sources. Two of these reached energies greater than 1 petaelectronvolt (PeV), an energy level thousands of times higher than the highest energy neutrino yet produced in a manmade accelerator.
“We’re looking for the first time at high energy neutrinos that are not coming from the atmosphere,” says Francis Halzen, principal investigator of IceCube and the Hilldale and Gregory Breit Distinguished Professor of Physics at University of Wisconsin–Madison. “This is what we were looking for,” he adds.
Because they rarely interact with matter and are unimpeded by gravity, neutrinos can carry information about the workings of the highest-energy and most distant phenomena in the universe. Though billions of neutrinos pass through the Earth every second, the vast majority originate either in the sun or in the Earth’s atmosphere. Far rarer are high-energy neutrinos that may hail from the most powerful cosmic events — such as gamma ray bursts, black holes, or star formation — where they would be created in association with high-energy cosmic rays that can reach energies up to thousands of PeVs.
Postdoctoral fellow Nathan Whitehorn described 28 high-energy neutrino events captured by the detector between May 2010 and May 2012. These events, including two that exceeded the unprecedented energy level of 1 PeV, were one of the main goals for building a detector such as IceCube.
“Their properties are strongly inconsistent with what you would expect of atmospheric sources and are almost exactly what you would expect from an astrophysical source,” Whitehorn says. It is premature to speculate where these neutrinos originated, he adds, but the IceCube collaboration is continuing to refine and expand the analysis.
IceCube is comprised of more than 5,000 digital optical modules suspended in a cubic kilometer of ice at the South Pole. The National Science Foundation-supported observatory detects neutrinos through the tiny flashes of blue light produced when a neutrino interacts with a water molecule in the ice.
The first hints of high-energy neutrinos came with the unexpected discovery in April 2012 of two detector events above 1 PeV. An analysis of those events was reported last month in a paper submitted to the journal Physical Review Letters. An intensified search, led by Whitehorn and fellow WIPAC scientists Claudio Kopper and Naoko Kurahashi Neilson, turned up 26 additional events exceeding 30 teraelectronvolts (TeV; one-thousandth of a PeV), which will be described in a forthcoming publication.
The Daily Galaxy via http://www.news.wisc.edu/21790
Bundled, Buried & Behind Closed Doors
Lower Manhattan’s 60 Hudson Street is one of the world’s most concentrated hubs of Internet connectivity. This short documentary peeks inside, offering a glimpse of the massive material infrastructure that makes the Internet possible.
Written and edited by Ben Mendelsohn
Shot and animated by Alex Chohlas-Wood
Featuring interviews with Stephen Graham, Saskia Sassen, Dave Timmes of Telx, Rich Miller of datacenterknowledge.com, Stephen Klenert of Atlantic Metro Communications, and Josh Wallace of the City of Palo Alto Utilities.
“Is more data always better? Hardly. In fact, if you’re looking for correlations—is thing X connected to thing Y, in a way that will give me information I can act on?—gathering more data could actually hurt you.”
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The Honeysuckle Creek Tracking Station near Canberra, Australia, were used to support the NASA Appallow and Skylab missions. In 1981, the 26 meter antenna was relocated to Canberra Deep Space Communications Complex. The original Honeysuckle Creek Tracking Station has since been leveled.
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Ponemon Institute© Research Report
Sponsored by Emerson Network Power
Independently conducted by Ponemon Institute, LLC
Publication Date: February 1, 2011
We have updated the Network Design Cookbook to include the following:
- IPv6 stateless autoconfiguration update (section 8.25 IPv6 - Step 2: Dynamic)
- LAN and DC — L2/L3 Topology updates (section 9.3.2 LAN and Data Center - Step 2: L2/L3 Topology)
- Stackwise in Access Layer (section 6.1 LAN (Campus) Solution- Step 6: Best Practices)
- IP Accounting added to Network Management Services (section 8.2.8 Network Management - Step 1)
- Added Event Detection and IP Event Dampening (section 8.1 General Services - Step 1)
- Update to Data Center Facilities and Rack Requirements (section 9.11 Standards - 9.11.4 Data Center Facilities)
- Added new section under “Other Design Resources” related to the Cisco Nexus (section 11.3.5 Cisco Nexus)
- Data Center Migration Tasks using Cisco Nexus Hardware
- Data Center Facilities
- Hardware Checklist
- Cisco Nexus 7000 Deployment Points
- Added new section under “Other Design Resources” related to the Network Security (section 11.3.6 Network Security)
- Grammer and word corrections
Un centro de datos, en el Polo Sur
Vía Ars Technica
Whoop! IceCube Data Center!
The ALMA correlator, one of the most powerful supercomputers in the world, fully installed and tested at its remote, high altitude site in the Andes of northern Chile. This wide-angle view shows some of the racks of the correlator in the ALMA Array Operations Site Technical Building. This photograph shows one of four quadrants of the correlator. The full system has four identical quadrants, with over 134 million processors, performing up to 17 quadrillion operations per second. (ESO)
Source: The Atlantic
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