CERN Accelerating science

Information Technology Articles

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2015-05-27
18:39
Towards a 21st century telephone exchange at CERN / Valentin Vinagrero, Francisco (CERN) ; Hesnaux, Anthony Gerard (Group ESAIP Enseignement Superieur (FR)) ; Sierra, Rodrigo (CERN) ; Chapron, Frederic (CERN)
The advent of mobile telephony and Voice over IP (VoIP) has significantly impacted the traditional telephone exchange industry—to such an extent that private branch exchanges are likely to disappear completely in the near future. For large organisations, such as CERN, it is important to be able to smooth this transition by implementing new multimedia platforms that can protect past investments and the flexibility needed to securely interconnect emerging VoIP solutions and forthcoming developments such as Voice over LTE (VoLTE). [...]
CERN-IT-Note-2015-005.- Geneva : CERN, 2015 - 7 p. - Published in : J. Phys.: Conf. Ser. 664 (2015) 052039 Access to fulltext: PDF; IOP Open Access article: PDF;
In : 21st International Conference on Computing in High Energy and Nuclear Physics, Okinawa, Japan, 13 - 17 Apr 2015, pp.052039

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2015-05-20
11:44
High-Speed Mobile Communications in Hostile Environments / Agosta, Stefano (CERN) ; Sierra, Rodrigo (CERN) ; Chapron, Frederic (CERN)
With the inexorable increase in the use of mobile devices, wireless connectivity is expected by users anywhere, anytime. In general, this requirement is addressed in office buildings or public locations through the use of Wi-Fi technology but Wi-Fi is not well adapted for use in large experiment halls and complex underground environments, especially those where radiation exposure is an issue, such as the LHC tunnel and experimental caverns. [...]
CERN-IT-Note-2015-004.- Geneva : CERN, 2015 - 5 p. - Published in : J. Phys.: Conf. Ser. 664 (2015) 052001 Access to fulltext: PDF; IOP Open Access article: PDF;
In : 21st International Conference on Computing in High Energy and Nuclear Physics, Okinawa, Japan, 13 - 17 Apr 2015, pp.052001

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2015-05-19
11:04
LHCOPN and LHCONE: Status and Future Evolution / Martelli, Edoardo (CERN) ; Stancu, Stefan Nicolae (CERN)
The LHC Optical Private Network (LHCOPN), linking CERN and the Tier 1s, and the LHC Open Network Environment (LHCONE) which links these to the Tier 2 community both successfully supported the data transfer needs of the LHC community during Run 1 and have now evolved to serve the networking requirements of the new computing models for Run 2. We present here the current status and the key changes, notably the delivered and planned bandwidth increases, the ongoing work to better address the needs of the Asia-Pacific region, developments to improve redundancy and progress made for provisioning point-to-point links..
CERN-IT-Note-2015-003.- Geneva : CERN, 2015 - 6 p. - Published in : J. Phys.: Conf. Ser. 664 (2015) 052025 Access to fulltext: PDF; IOP Open Access article: PDF;
In : 21st International Conference on Computing in High Energy and Nuclear Physics, Okinawa, Japan, 13 - 17 Apr 2015, pp.052025

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2013-11-21
08:54
Technologies for Large Data Management in Scientific Computing / Pace, A (CERN)
In recent years, intense usage of computing has been the main strategy of investigations in several scientific research projects. The progress in computing technology has opened unprecedented opportunities for systematic collection of experimental data and the associated analysis that were considered impossible only few years ago. [...]
CERN-IT-2013-005.- Geneva : CERN, 2014 - 64 p. - Published in : Int. J. Mod. Phys. C 25 (2014) 1430001 Fulltext: PDF; World Scientific Open Access article: PDF;

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2013-10-30
11:42
Helix Nebula and CERN: A Symbiotic approach to exploiting commercial clouds / Barreiro Megino, Fernando Harald (CERN) ; Jones, Robert (CERN) ; Kucharczyk, Katarzyna (CERN) ; Medrano Llamas, Ramón (CERN) ; van der Ster, Daniel (CERN)
The recent paradigm shift toward cloud computing in IT, and general interest in "Big Data" in particular, have demonstrated that the computing requirements of HEP are no longer globally unique. Indeed, the CERN IT department and LHC experiments have already made significant R&D; investments in delivering and exploiting cloud computing resources. [...]
CERN-IT-2013-004.- Geneva : CERN, 2014 - 5 p. - Published in : J. Phys.: Conf. Ser. 513 (2014) 032067 Fulltext: PDF;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.032067

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2013-10-30
10:08
Commissioning the CERN IT Agile Infrastructure with experiment workloads / Medrano Llamas, Ramón (CERN) ; Barreiro Megino, Fernando Harald (CERN) ; Kucharczyk, Katarzyna (CERN) ; Denis, Marek Kamil (CERN) ; Cinquilli, Mattia (CERN)
In order to ease the management of their infrastructure, most of the WLCG sites are adopting cloud based strategies. In the case of CERN, the Tier 0 of the WLCG, is completely restructuring the resource and configuration management of their computing center under the codename Agile Infrastructure. [...]
CERN-IT-2013-003.- Geneva : CERN, 2014 - 6 p. - Published in : J. Phys.: Conf. Ser. 513 (2014) 032066 Fulltext: PDF;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.032066

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2013-10-30
10:04
Testing as a Service with HammerCloud / Medrano Llamas, Ramón (CERN) ; Barrand, Quentin (CERN) ; Elmsheuser, Johannes (Ludwig-Maximilians-Universitӓt München) ; Legger, Federica (Ludwig-Maximilians-Universitӓt München) ; Sciacca, Gianfranco (Universitӓt Bern) ; Sciabà, Andrea (CERN) ; van der Ster, Daniel (CERN)
HammerCloud was designed and born under the needs of the grid community to test the resources and automate operations from a user perspective. The recent developments in the IT space propose a shift to the software defined data centres, in which every layer of the infrastructure can be offered as a service. [...]
CERN-IT-2013-002.- Geneva : CERN, 2014 - 7 p. - Published in : J. Phys.: Conf. Ser. 513 (2014) 062031 Fulltext: DOCX;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.062031

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2013-07-15
17:15
Information and treatment of unknown correlations in the combination of measurements using the BLUE method / Valassi, A (CERN) ; Chierici, R (Lyon, IPN)
We discuss the effect of large positive correlations in the combinations of several measurements of a single physical quantity using the Best Linear Unbiased Estimate (BLUE) method. We suggest a new approach for comparing the relative weights of the different measurements in their contributions to the combined knowledge about the unknown parameter, using the well-established concept of Fisher information. [...]
arXiv:1307.4003; CERN-IT-Note-2013-003.- Geneva : CERN, 2014 - 25 p. - Published in : Eur. Phys. J. C 74 (2014) 2717 Access to full-text: PDF; Springer Open Access article: PDF;

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2013-07-03
09:51
Towards Building a Blog Preservation Platform / Kasioumis, Nikos (CERN) ; Banos, Vangelis (Aristotle U., Thessaloniki) ; Kalb, Hendrik (Tech. U. Berlin)
Social media content and user participation has increased dramatically since the advent of Web 2.0. Blogs have become relevant to every aspect of business and personal life. [...]
CERN-IT-2013-001.- Geneva : CERN, 2014 - 30 p. - Published in : World Wide Web 14 (2014) 799-825 Fulltext: PDF;

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2013-03-14
17:05
BOINC service for volunteer cloud computing / Høimyr, N (CERN) ; Blomer, J (CERN) ; Buncic, P (CERN) ; Giovannozzi, M (CERN) ; Gonzalez, A (CERN) ; Harutyunyan, A (CERN) ; Jones, P L (CERN) ; Karneyeu, A (CERN) ; Marquina, M A (CERN) ; Mcintosh, E (CERN) et al.
Since a couple of years, a team at CERN and partners from the Citizen Cyberscience Centre (CCC) have been working on a project that enables general physics simulation programs to run in a virtual machine on volunteer PCs around the world. The project uses the Berkeley Open Infrastructure for Network Computing (BOINC) framework. [...]
CERN-IT-Note-2013-002.- Geneva : CERN, 2012 - 6 p. - Published in : J. Phys.: Conf. Ser. 396 (2012) 032057
External link: Access to fulltext
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.032057

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