By René Brun (auth.), René Brun, Federico Carminati, Giuliana Galli Carminati (eds.)
Born after global conflict II, large-scale experimental high-energy physics (HEP) has came upon itself constrained ever when you consider that by means of on hand accelerator, detector and computing applied sciences. as a result, HEP has made major contributions to the advance of those fields, usually riding their strategies. the discovery of the realm broad net at CERN is simply the best-known instance out of many. This ebook is the 1st finished account to track the background of this pioneering spirit within the box of computing applied sciences. It covers every thing as much as and together with the present-day dealing with of the large calls for imposed upon grid and allotted computing via full-scale LHC operations—operations that have for years concerned many hundreds of thousands of taking part contributors around the globe and for that reason give you the unique and usual testbed for grid computing ideas. This ebook takes the reader on a guided journey encompassing all proper issues, together with programming languages, software program engineering, huge databases, the internet, and grid- and cloud computing. the $64000 factor of highbrow estate rules for dispensed software program engineering and computing is usually addressed. Aptly, the publication closes with a visionary bankruptcy of what could lie forward. Approachable and requiring purely uncomplicated knowing of physics and machine sciences, this e-book is meant for either schooling and research.
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Extra resources for From the Web to the Grid and Beyond: Computing Paradigms Driven by High-Energy Physics
I already mentioned the exercise by Jean Luc Dekeyser to implement the geometry package in ADA. In 1989, we implemented an interface with the hadronic package of the FLUKA [3, 20] system. But the major work was in making the system more robust, implementing better physics algorithms for energy loss, multiple scattering, and tracking in non homogeneous magnetic fields. The development stopped in 1993. However GEANT 3 has been used for the design of all LHC experiments and 26 R. Brun is still used today by many experiments, in particular with the Virtual Monte-Carlo (VMC) system developed in 1997 by the LHC ALICE  collaboration.
7. 10 R. Brun With the x86 processors, the number of desktop machines exploded very quickly. Starting in 2000, laptops changed the modus vivendi in HEP and other fields. Conference rooms were populated by attendees each with laptops on their knees communicating with the outside world via a wireless network, such that they could participate in many conferences simultaneously or continue to do their normal work. Presentations that were using transparencies moved quickly to Microsoft PowerPoint with a substantial quality improvement.
The message from Ian could not have been more clear: “If in 3 months, the ZEBRA system was not functioning, we were both fired from CERN”. As it is well known that in the software area, one can always claim that something is ready on time, we were proud to show a running ZEBRA system less than 2 months later. 22 R. Brun In addition, GEANT 3 had been fully converted from ZBOOK to ZEBRA. This seemed like a convincing argument to OPAL, L3 and DELPHI  collaborations who decided to base their framework on ZEBRA immediately.
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