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5th International Conference on Particle Physics and Astrophysics, ICPPA 2020

作者： Alekseev, A. Kiryanov, A. Klimentov, A. Korchuganova, T. Mitsyn, V. Oleynik, D. Smirnov, A. Smirnov, S. Zarochentsev, A. Compiler Technology Department Ivannikov Institute for System Programming of the Ras Moscow109004 Russia Cloud Technologies and Big Data Analytics Laboratory Plekhanov Russian University of Economics Moscow117997 Russia Atlas Group Universidad Andres Bello Santiago7550196 Chile Department of Computing Resources and Technologies Nrc "kurchatov Institute"-PNPI Gatchina188300 Russia Physics Department Brookhaven National Laboratory UptonNY11973 United States Laboratory of Information Technologies Joint Institute for Nuclear Research Dubna141980 Russia Institute of Nuclear Physics and Engineering National Research Nuclear University MEPhI Moscow115409 Russia Laboratory of Ultra-High Energy Physics Saint Petersburg State University Saint Petersburg198504 Russia

The next phase of LHC Operations-High Luminosity LHC (HL-LHC), which is aimed at ten-fold increase in the luminosity of proton-proton collisions at the energy of 14 TeV, is expected to start operation in 2027-2028 and will deliver an unprecedented scientific data volume of multi-exabyte scale. This amount of data has to be stored and the corresponding storage system should ensure fast and reliable data delivery for processing by scientific groups distributed all over the world. The present LHC computing and data processing model will not be able to provide the required infrastructure growth even taking into account the expected hardware technology evolution. To address this challenge the new state-of-The-Art computing infrastructure technologies are now being developed and are presented here. The possibilities of application of the HL-LHC distributed data handling technique for other particle and astro-particle physics experiments dealing with large-scale data volumes like DUNE, LSST, Belle-II, JUNO, SKAO etc. are also discussed. © Published under licence by IOP Publishing Ltd.

关键词： Luminance

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Scientific Data Lake for High Luminosity LHC project and other data-intensive particle and astro-particle physics experiments

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Journal of Physics: Conference Series 2020年第1期1690卷

作者： A Alekseev A Kiryanov A Klimentov T Korchuganova V Mitsyn D Oleynik A Smirnov S Smirnov A Zarochentsev Compiler Technology Department Ivannikov Institute for System Programming of the RAS Moscow 109004 Russia Cloud technologies and Big Data analytics laboratory Plekhanov Russian University of Economics Moscow 117997 Russia ATLAS group Universidad Andres Bello Santiago 7550196 Chile Department of computing resources and technologies NRC 'Kurchatov Institute' - PNPI 188300 Gatchina Russia Physics Department Brookhaven National Laboratory Upton NY 11973 USA Laboratory of Information Technologies Joint Institute for Nuclear Research Dubna 141980 Russia Institute of Nuclear Physics and Engineering National Research Nuclear University MEPhI Moscow 115409 Russia Laboratory of Ultra-High Energy Physics Saint Petersburg State University Saint Petersburg 198504 Russia

The next phase of LHC Operations – High Luminosity LHC (HL-LHC), which is aimed at ten-fold increase in the luminosity of proton-proton collisions at the energy of 14 TeV, is expected to start operation in 2027-2028 and will deliver an unprecedented scientific data volume of multi-exabyte scale. This amount of data has to be stored and the corresponding storage system should ensure fast and reliable data delivery for processing by scientific groups distributed all over the world. The present LHC computing and data processing model will not be able to provide the required infrastructure growth even taking into account the expected hardware technology evolution. To address this challenge the new state-of-the-art computing infrastructure technologies are now being developed and are presented here. The possibilities of application of the HL-LHC distributed data handling technique for other particle and astro-particle physics experiments dealing with large-scale data volumes like DUNE, LSST, Belle-II, JUNO, SKAO etc. are also discussed.

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Dynamics of control

Dynamics of control

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1st IEEE/IFIP International Symposium on Theoretical Aspects of Softwave Engineering

作者： Sanders, J. W. Turilli, Matteo United Nations University International Institute for Software Technology P O Box 3058 Macao Programming Research Group Oxford University Computing Laboratory Wolf Son Building Oxford OX1 3QD Parks Rd

ISBN: (纸本)9780769528564

This paper proposes a notion, the 'ambit' of an action, that allows the degree of distribution of an action in a multiagent system to be quantified without regard to its functionality. It demonstrates the use of that notion in the design, analysis and implementation of dynamically-reconfigurable multi-agent systems. It distinguishes between the extensional (or system) view and intensional (or agent-based) view of such a system and shows how, using the notion of ambit, the step-wise derivation paradigm of Formal Methods can be used to derive the latter from the former In closing it addresses the manner in which these ideas inform studies in the ethics of systems of artificial agents.

关键词： Control system analysis

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Dynamics of Control

Dynamics of Control

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Theoretical Aspects of Software Engineering (TASE)

作者： J W Sanders Matteo Turilli International Institute for Software Technology United Nations University Macau Macao China Programming Research Group Oxford University Computing Laboratory Oxford UK

This paper proposes a , the "ambit' of an action, that allows the degree of distribution of an action in a multiagent system to be quantified without regard to its functionality. It demonstrates the use of that notion in the design, analysis and implementation of dynamically-reconfigurable multi-agent systems. It distinguishes between the extensional (or system) view and intensional (or agent-based) view of such a system and shows how, using the notion of ambit, the step-wise derivation paradigm of formal methods can be used to derive the latter from the former. In closing it addresses the manner in which these ideas inform studies in the ethics of systems of artificial agents.

关键词： Multiagent systems Dynamic programming Ethics Personal digital assistants Control systems Functional programming Distributed computing Laboratories Buildings Information technology

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Computations and relational bundles

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9th International Conference on Relational Methods in Computer Science and 4th International Workshop on Applications of Kleene Algebra, RelMiCS/AKA 2006

作者： Sanders, J.W. Computing Laboratory Programming Research Group Oxford University Parks Road Oxford OX1 3QD United Kingdom

ISBN: (纸本)3540378731

We explore the view of a computation as a relational section of a (trivial) fibre bundle: initial states lie in the base of the bundle and final states lie in the fibres located at their initial states. This leads us to represent a computation in 'fibre-form' as the angelic choice of its behaviours from each initial state. That view is shown to have the advantage also of permitting final states to be of different types, as might be used for example in a semantics of probabilistic computations, and of providing a natural setting for refinement of computations. However we apply that view in a different direction. On computations more general than code the two standard models, the relational and the predicate-transformer models, obey different laws. One way to understand that difference is to study the laws of more refined models, like the semantics of probabilistic computations. Another is to characterise each model by its laws. In spite of their differences, the relational model is embedded in the transformer model by a Galois connection which can be used to transfer much of the structure on transformers to the relational model. We investigate the extent to which the conjugate on predicate transformers translates to relations and use the result to motivate a characterisation of relational computations, achieved by using fibre-forms. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Computation theory

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How to prevent type flaw attacks on security protocols

How to prevent type flaw attacks on security protocols

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作者： Heather, James Lowe, Gavin Schneider, Steve Department of Computing Sch. of Electron. Comp./Mathematics University of Surrey Guildford Surrey GU2 7XH United Kingdom Programming Research Group Computing Laboratory Oxford University Parks Road Oxford OX1 3QD United Kingdom Royal Holloway University of London Egham Hill Egham Surrey TW20 0EX United Kingdom

A type flaw attack on a security protocol is an attack where a field that was originally intended to have one type is subsequently interpreted as having another type. A number of type flaw attacks have appeared in the academic literature. In this paper we prove that type flaw attacks can be prevented using a simple technique of tagging each field with some information indicating its intended type.

关键词： Network protocols

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How to prevent type flaw attacks on security protocols

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Journal of Computer Security 2003年第2期11卷 217-244页

作者： Heather, James Lowe, Gavin Schneider, Steve Department of Computing School of Electronics Computing and Mathematics University of Surrey Guildford Surrey GU2 7XH UK. E-mail: Programming Research Group Oxford University Computing Laboratory Wolfson Building Parks Road Oxford OX1 3QD UK. E-mail: Royal Holloway University of London Egham Hill Egham Surrey TW20 0EX UK. E-mail:

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Managing external workload with BSP time warp

Managing external workload with BSP time warp

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Proceedings of the 2002 Winter Simulation Conference

作者： Low, Malcolm Yoke Hean Programming Research Group Computing Laboratory University of Oxford Parks Road Oxford OX1 3QD United Kingdom

An extension to the existing bulk synchronous parallel time warp (BSP-TW) dynamic load-balancing algorithms was presented. The algorithm allowed the management to work without interruption from external workload. Experiments results on a manufacturing simulation model showed that significance performance improvement could be achieved with external workload management.

关键词： Parallel processing systems

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Quantitative program logic and expected time bounds in probabilistic distributed algorithms

Quantitative program logic and expected time bounds in proba...

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Real Time and Probabilistic Systems (ARTS '99)

作者： McIver, A.K. Programming Research Group Oxford University Computing Laboratory Wolfson Building Parks Road Oxford OX1 3QD United Kingdom

In this paper we show how quantitative program logic (Morgan et al., ACM Trans. programming Languages Systems 18 (1996) 325) provides a formal framework in which to promote standard techniques of program analysis to a context where probability and nondeterminism interact, a situation common to probabilistic distributed algorithms. We show that overall expected time can be formulated directly in the logic and that it can be derived from local properties of components. We illustrate the methods with an analysis of expected running time of the probabilistic dining philosophers (Lehmann and Ravin, Proc 8th Annu. ACM. Symp. on principles of programming Languages, ACM, New York, 1981, p. 133). © 2002 Published by Elsevier Science B.V.

关键词： Probabilistic logics

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Managing external workload with BSP Time Warp

Managing external workload with BSP Time Warp

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Simulation Winter Conference

作者： M.Y.H. Low Programming Research Group Computing Laboratory University of Oxford Oxford UK

This paper describes an extension to the existing BSP Time Warp (Bulk Synchronous Parallel Time Warp) dynamic load-balancing algorithm to allow the management of interruption from external workload. Experiments carried out on a manufacturing simulation model using different partition strategies with and without interruption from external workload show that significant performance improvement can be achieved with external workload management.

关键词： Computational modeling Protocols Virtual manufacturing Heuristic algorithms Concurrent computing Time warp simulation Costs Laboratories Partitioning algorithms Interference

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