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[en] The CMS experiment at the Large Hadron Collider is relying on the HTCondor-based glideinWMS batch system to handle most of its distributed computing needs. In order to minimize the risk of disruptions due to software and hardware problems, and also to simplify the maintenance procedures, CMS has set up its glideinWMS instance to use most of the attainable High Availability (HA) features. The setup involves running services distributed over multiple nodes, which in turn are located in several physical locations, including Geneva (Switzerland), Chicago (Illinois, USA) and San Diego (California, USA). This paper describes the setup used by CMS, the HA limits of this setup, as well as a description of the actual operational experience spanning many months.
[en] Aim of the paper is the demonstration of a paradigm shift in shape, color and spectral measurements in industry, biology and medicine as well as in measurement science, education and training. Laboratory applications will be supplemented and replaced by innovative in-field and point-of-care applications. Innovative functional modules are smartphones and/or smartpads supplemented by additional hardware apps and software apps. Specific examples are given for numerous practical applications concerning optodigital methods. The methodological classification distinguishes between different levels for combinations of hardware apps (hwapps) and software apps (swapps) with smartphones and/or smartpads. These methods are fundamental enablers for the transformation from conventional stationary working places in industry, biology, medicine plus science, education and training towards innovative mobile working places with in-field and point-of-care characteristics as well as mobile open online courses MOOCs. The innovative approach opens so far untapped enormous markets for measurement science and engineering. These working conditions will be very common due to their convenience, reliability and affordability. The fundamental enablers are smartphones and/or smartpads. A highly visible advantage of smartphones and/or smartpads is the huge number of their distribution, their worldwide connectivity via Internet and cloud services and the experienced capabilities of their users for practical operations. Young people are becoming the pioneers
[en] A very challenging test beam programme is being undertaken by the CALICE collaboration as part of a major R and D directed towards the design of an ILC calorimeter. This design has to be optimized for both performance and cost, where particle flow (PFA) calorimetry and software compensation are the main aim of the studies. This paper will concentrate on describing the experimental set-ups for the 2006, 2007 and 2008 test beams that have been carried out by the CALICE collaboration at CERN and FNAL.
[en] We benchmarked an ARM cortex-A9 based server system with a four-core CPU running at 1.1 GHz. The system used Ubuntu 12.04 as operating system and the HEPSPEC 2006 (HS06) benchmarking suite was compiled natively with gcc-4.4 on the system. The benchmark was run for various settings of the relevant gcc compiler options. We did not find significant influence from the compiler options on the benchmark result. The final HS06 benchmark result is 10.4.
[en] A small experiment must devote its limited computing expertise to writing physics code directly applicable to the experiment. A software 'framework' is essential for providing an infrastructure that makes writing the physics-relevant code easy. In this paper, we describe a highly modular and easy to use framework for writing Geant4 based simulations called 'artg4'. This framework is a layer on top of the art framework.
[en] At CHEP2007 we reported on the perfmon2 subsystem as a tool for interfacing to the PMUs (Performance Monitoring Units) which are found in the hardware of all modern processors (from AMD, Intel, SUN, IBM, MIPS, etc.). The intent was always to get the subsystem into the Linux kernel by default. This paper reports on how progress was made (after long discussions) and will also show the latest additions to the subsystems.
[en] Considering the limited availability of laboratories for physics teaching and the difficulties this causes in the learning of school students in Santa Marta Colombia, we have developed software in order to generate greater student interaction with the phenomena physical and improve their understanding. Thereby, this system has been proposed in an architecture Model/View- View- Model (MVVM), sharing the benefits of MVC. Basically, this pattern consists of 3 parts: The Model, that is responsible for business logic related. The View, which is the part with which we are most familiar and the user sees. Its role is to display data to the user and allowing manipulation of the data of the application. The ViewModel, which is the middle part of the Model and the View (analogous to the Controller in the MVC pattern), as well as being responsible for implementing the behavior of the view to respond to user actions and expose data model in a way that is easy to use links to data in the view. .NET Framework 4.0 and editing package Silverlight 4 and 5 are the main requirements needed for the deployment of physical simulations that are hosted in the web application and a web browser (Internet Explorer, Mozilla Firefox or Chrome). The implementation of this innovative application in educational institutions has shown that students improved their contextualization of physical phenomena
[en] CMS software consists of over two million lines of code actively developed by hundreds of developers from all around the world. Optimal build, release and distribution of such a large-scale system for production and analysis activities for hundreds of sites and multiple platforms are quite a challenge. Its dependency on more than hundred external tools make its build and distribution more complex. We describe how parallel build of software and minimal distribution size dramatically reduced the time gap between software build and installation on remote sites, and how producing few big binary products, instead of thousands of small ones, helped finding out the integration and runtime issues.
[en] Let R 2 denotes the ring F 2 + μF 2 + υ2 + μυ F 2 + wF 2 + μwF 2 + υwF 2 + μυwF2. In this study, we construct quantum codes from cyclic codes over the ring R2, for arbitrary length n, with the restrictions μ2 = 0, υ2 = 0, w 2 = 0, μυ = υμ, μw = wμ, υw = wυ and μ (υw) = (μυ) w. Also, we give a necessary and sufficient condition for cyclic codes over R2 that contains its dual. As a final point, we obtain the parameters of quantum error-correcting codes from cyclic codes over R 2 and we give an example of quantum error-correcting codes form cyclic codes over R 2. (paper)