Filters








1,026 Hits in 6.0 sec

DIRAC RESTful API

A Casajus Ramo, R Graciani Diaz, A Tsaregorodtsev
2012 Journal of Physics, Conference Series  
Users interact with DIRAC via command line, using the web portal or accessing resources via the DIRAC python API. The current DIRAC API requires users to use a python version valid for DIRAC.  ...  -DIRAC: Secure web user interface A Casajus Ramo and M Sapunov -Consolidation and development roadmap of the EMI middleware B Kónya, C Aiftimiei, M Cecchi et al.  ...  Those communities would like to connect their own projects with DIRAC. DIRAC is almost entirely coded in Python [17] and provides an API for third party applications to interact with it.  ... 
doi:10.1088/1742-6596/396/5/052019 fatcat:zv6rpezfvndjpl6r7gtksk4nvy

DIRAC: a community grid solution

A Tsaregorodtsev, M Bargiotti, N Brook, A C Ramo, G Castellani, P Charpentier, C Cioffi, J Closier, R G Diaz, G Kuznetsov, Y Y Li, R Nandakumar (+5 others)
2008 Journal of Physics, Conference Series  
Acknowledgements The authors would like to acknowledge the European Marie Curie Fellowships program which allowed several young and dynamic developers to contribute to the DIRAC project.  ...  The DIRAC main programming language is Python and programming interfaces (APIs) are provided in this language.  ...  For the users of the DIRAC system the functionality is available through a command line interface. Some DIRAC subsystems have specialized shells to work with.  ... 
doi:10.1088/1742-6596/119/6/062048 fatcat:uurtmn4onvfsrghbsd3swr2ng4

Magneto-optical Kerr effect in spin split two-dimensional massive Dirac materials [article]

G. Catarina and N. M. R. Peres and J. Fernández-Rossier
2019 arXiv   pre-print
Here, we show that the presence of spin-orbit interactions, combined with an exchange spin splitting induced either by diluted magnetic impurities or by proximity to a ferromagnetic insulator, gives origin  ...  Two-dimensional (2D) massive Dirac electrons possess a finite Berry curvature, with Chern number ± 1/2, that entails both a quantized dc Hall response and a subgap full-quarter Kerr rotation.  ...  However, the introduction of an exchange spin splitting -which breaks timereversal symmetry-, combined with the strong spin-orbit interactions 10, 11 , offsets this cancellation, leading to an anomalous  ... 
arXiv:1910.13371v1 fatcat:hn65pxaymra2fbbj353wptvn4i

Adaptive Aggregation Based Domain Decomposition Multigrid for the Lattice Wilson Dirac Operator [article]

Andreas Frommer, Karsten Kahl, Stefan Krieg, Björn Leder, Matthias Rottmann
2014 arXiv   pre-print
In lattice QCD computations a substantial amount of work is spent in solving discretized versions of the Dirac equation.  ...  We show in extensive numerical test conducted with a parallel production code implementation that considerable speed-up over conventional Krylov subspace methods, domain decomposition methods and other  ...  We also thank the Budapest-Marseille-Wuppertal collaboration for providing configurations and compute time on Juropa.  ... 
arXiv:1303.1377v3 fatcat:opfleyqqqjb6deey7elrgmpjb4

Magneto-optical Kerr effect in spin split two-dimensional massive Dirac materials

Gonçalo Catarina, Nuno M R Peres, Joaquín Fernández-Rossier
2020 2D Materials  
Here, we show that the presence of spin-orbit interactions, combined with an exchange spin splitting induced either by diluted magnetic impurities or by proximity to a ferromagnetic insulator, gives origin  ...  in pairs with opposite sign Berry curvatures, leading to a vanishing Chern number.  ...  However, the introduction of an exchange spin splitting-which breaks time-reversal symmetry-, combined with the strong spin-orbit interactions [10, 11] , offsets this cancellation, leading to an anomalous  ... 
doi:10.1088/2053-1583/ab6781 fatcat:3lcc35v6mbetxed3qfnj26apsa

Surmounting the Cartesian Cut: Klein Bottle Logophysics, The Dirac Algebra and the Genetic Code

Diego Lucio Rapoport
2011 NeuroQuantology  
We discuss this KB codification of the 64 codons with its isomorphic representation in terms of the Dirac Algebra (DA) of Quantum Mechanics, in the Nilpotent Universal Computational Rewrite System (NUCRS  ...  We complete the genetic codification of embryological differentiation introduced in an accompanying article.  ...  Sultan Tarlacı, Editor for JNQ, for his kind interest on my work and the invitation together with the Guest Editor, Dr. Tidjani Négadi, to contribute to this special issue.  ... 
doi:10.14704/nq.2011.9.4.493 fatcat:glynnxnydvhyfbgrmnp3tki5em

Adaptive Aggregation-Based Domain Decomposition Multigrid for the Lattice Wilson--Dirac Operator

A. Frommer, K. Kahl, S. Krieg, B. Leder, M. Rottmann
2014 SIAM Journal on Scientific Computing  
In lattice QCD computations a substantial amount of work is spent in solving discretized versions of the Dirac equation.  ...  We show in extensive numerical tests conducted with a parallel production code implementation that considerable speed-up over conventional Krylov subspace methods, domain decomposition methods and other  ...  We also thank the Budapest-Marseille-Wuppertal collaboration for providing configurations and compute time on Juropa.  ... 
doi:10.1137/130919507 fatcat:u7pkxuuq3rgfbjruaofr4hbczy

Page 7 of Cellular and Molecular Life Sciences Vol. 27, Issue 7 [page]

1971 Cellular and Molecular Life Sciences  
Introduction This paper is concerned with the medical applications of an interactive file-oriented language that allows the user to interface with a text-editor and with his own FORTRAN code.  ...  Lupwic, DIRAC: An Overview of an Inter- active Retrieval Language, Educ. Newsletter (September 1970).  ... 

Developing LHCb Grid software: experiences and advances

I. Stokes-Rees, A. Tsaregorodtsev, V. Garonne, R. Graciani, M. Sanchez, M. Frank, J. Closier
2006 Concurrency and Computation  
This paper discusses the group's experience with developing Grid Services, interfacing to the LCG, running LHCb experiment software on the grid, and the integration of a number of new technologies into  ...  The LHCb grid software has been used for two Physics Data Challenges, the most recent of which will have produced 90 TB of data and required over 400 processor-years of computing power.  ...  Help from the LCG Experiment Support Group, particularly Roberto Santinelli and Flavia Donno, was invaluable for integrating DIRAC with LCG.  ... 
doi:10.1002/cpe.1048 fatcat:2rcfalzmsjf4vlkybiu36kk6bm

Accessing Grid and Cloud Services Through a Scientific Web Portal

Marco Bencivenni, Diego Michelotto, Roberto Alfieri, Riccardo Brunetti, Andrea Ceccanti, Daniele Cesini, Alessandro Costantini, Enrico Fattibene, Luciano Gaido, Giuseppe Misurelli, Elisabetta Ronchieri, Davide Salomoni (+3 others)
2014 Journal of Grid Computing  
Distributed Computing Infrastructures have dedicated mechanisms to provide user communities with computational environments.  ...  Grid computing facilities.  ...  The portal implements this scenario by interfacing the Job portlet with a multi-VOs configured DIRAC server.  ... 
doi:10.1007/s10723-014-9310-y fatcat:zuelcv45szdmfaitqgwkx5oaja

BESIII and SuperB: distributed job management with Ganga

I Antoniev, Z Deng, J Ebke, U Egede, A Fella, A Galvani, Y Han, M Kenyon, L Lin, E Luppi, M Manzali, J Moscicki (+6 others)
2012 Journal of Physics, Conference Series  
Such a tool should provide a user-friendly interface for physics production groups and ordinary analysis users to access heterogeneous computing resources, without requiring knowledge of the underlying  ...  Ganga, with its common framework and customizable plug-in structure is such a tool.  ...  It interacts with the Ganga plug-in for monitoring purposes only.  ... 
doi:10.1088/1742-6596/396/3/032120 fatcat:2bhzghqdvnbh3eywos4iutbche

Easing Scientific Computing and Federated Management in the Cloud with OCCI

Zdeněk Šustr, Diego Scardaci, Jiří Sitera, Boris Parák, Víctor Méndez Muñoz
2016 Proceedings of the 6th International Conference on Cloud Computing and Services Science  
client or single-user graphical interface, to libraries ready for integration with large workload management frameworks and job submission portals relied on by large science communities across Europe.  ...  It provides them with a single protocol to abstract the differences between cloud service implementations used on sites run by different providers.  ...  Traditionally short on technical support and development staff, or lacking it completely, an interoperability standard such as OCCI helps them by providing a single interface to interact with multiple  ... 
doi:10.5220/0005934403470354 dblp:conf/closer/SustrSSPM16 fatcat:bkwfta3e2bdobhkuvfoeqhjifa

Grid-BGC: A Grid-Enabled Terrestrial Carbon Cycle Modeling System [chapter]

Jason Cope, Craig Hartsough, Peter Thornton, Henry Tufo, Nathan Wilhelmi, Matthew Woitaszek
2005 Lecture Notes in Computer Science  
The primary objective of the project is to utilize Globus Grid technology to integrate inexpensive commodity cluster computational resources at CU with the mass storage system at NCAR while hiding the  ...  Overall, this project demonstrates an end-to-end system which leverages Grid technologies to harness distributed resources across organizational boundaries to achieve a cost-effective solution to a computeintensive  ...  Acknowledgements University of Colorado computer time was provided by equipment purchased under DOE SciDAC Grant #DE-FG02-04ER63870, NSF ARI Grant #CDA-9601817, NSF sponsorship of the National Center for  ... 
doi:10.1007/11549468_140 fatcat:vx4ehs3gcfc6hf3ifas4ptl2wi

A Framework for Execution of Computational Chemistry Codes in Grid Environments [chapter]

André Severo Pereira Gomes, Andre Merzky, Lucas Visscher
2006 Lecture Notes in Computer Science  
This framework can be divided into three independent parts, one dealing with the mapping of a calculation to a set of codes and the construction of execution environments, one dealing with the management  ...  Grid computing is a promising technology for computational chemistry, due to the large volume of calculations involved in appplications such as molecular modeling, thermochemistry and other types of systematic  ...  This framework is composed of three interacting but formally independent parts, integrated via a command-line interface: the first handling application-specific task of creating an execution script for  ... 
doi:10.1007/11758532_15 fatcat:5yygm3evinhe5k7fxoilhd6dpu

Organic materials database: An open-access online database for data mining

Stanislav S. Borysov, R. Matthias Geilhufe, Alexander V. Balatsky, Oksana Ostroverkhova
2017 PLoS ONE  
The OMDB web interface allows users to retrieve materials with specified target properties using non-trivial queries about their electronic structure.  ...  We illustrate the use of the OMDB and how it can become an organic part of search and prediction of novel functional materials via data mining techniques.  ...  Villum Foundation through the Villum Center for Dirac Materials, Dr.  ... 
doi:10.1371/journal.pone.0171501 pmid:28182744 pmcid:PMC5300202 fatcat:hxzbjlutu5buthu5yguvqp5vum
« Previous Showing results 1 — 15 out of 1,026 results