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Fifteenth National Congress on Rural Educaiton in Canada - Presentation 1
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Scripting languages like Python, R, andMATLAB have seen significant use across a variety of scientific domains. To assist scientists in the analysis of script executions, a number of mechanisms, e.g., noWorkflow, have been recently proposed to capture the provenance of script executions. The provenance information recorded can be used, e.g., to trace the lineage of a particular result by identifying the data inputs and the processing steps that were used to produce it. By and large, the provenance information captured for scripts is fine-grained in the sense that it captures data dependencies at the level of script statement, and do so for every variable within the script. While useful, the amount of recorded provenance information can be overwhelming for users and cumbersome to use. This suggests the need for abstraction mechanisms that focus attention on specific parts of provenance relevant for analyses. Toward this goal, we advocate that fine-grained provenance information recorded as the result of script execution can be abstracted using user-specified, workflow-like views. Specifically, we show how the provenance traces recorded by noWorkflow can be mapped to the workflow specifications generated by YesWorkflow from scripts based on user annotations. We examine the issues in constructing a successful mapping, provide an initial implementation of our solution, and present competency queries illustrating how a workflow view generated from the script can be used to explore the provenance recorded during script execution.
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Khalid Belhajjame
I gave this talk in the EDBT 2014 conference, which tool place in Athens, Greece. I show how data examples can be used to characterize the behavior of scientific modules. I present a new methods that automatically generate the data examples, and show that such data examples are useful for the human user to understand the task of the modules, and that they can be used to assist curators in repairing broken workflows (i.e., workflows for which one or more modules are no longer supplied by their providers)
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These slides introduces the second edition of ProvBench which I am leading to collect a corpus of provenance data for benchmarking for the provenance (and scientific) community
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Khalid Belhajjame
A use case presented in the workshop on understanding provenance and linked open data which tool place in Edinburgh in March 2011.
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A talk given at the EDBT/ICDT 2010 conference. For more details, visit the project website at http://img.cs.manchester.ac.uk/dataspaces/dataspaces.html
Edbt 2010, Belhajjame
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Khalid Belhajjame
This is a talk that was presented by Khalid Belhajjame at the eScience conference that took place in 2012 in Chicago.
Why Workflows Break
Why Workflows Break
Khalid Belhajjame
I gave this talk in TAPP 2014 during the provenance week in Cologne, on inferring fine graine dependencies between data (ports) in scientific workflows. -- khalid
Tapp 2014 (belhajjame)
Tapp 2014 (belhajjame)
Khalid Belhajjame
A use case designed in the context of the Dataone provenance woring group illustrating how the provenance traces generated by differet workflow engines can be quered via the D-PROV model.
D-prov use-case
D-prov use-case
Khalid Belhajjame
A short Prov Tutorial that I gave at the MADICS ReproVirtuFlow WG face to face meeting in Orsay.
A Sightseeing Tour of Prov and Some of its Extensions
A Sightseeing Tour of Prov and Some of its Extensions
Khalid Belhajjame
This is a keynote that I have given in polyweb workshop on the state of the art of data science reproducibility. I review tools that have been developed over the last few years in the first part. In the second part, I focus on proposals that I have been involved in to facilitate workflow reproducibility and preservation.
Reproducibility 1
Reproducibility 1
Khalid Belhajjame
Scientific Workflows have become the workhorse of BigData analytics for scientists. As well as being repeatable and optimizable pipelines that bring together datasets and analysis tools, workflows make-up an important part of the provenance of data generated from their execution. By faithfully capturing all stages in the analysis, workflows play a critical part in building up the audit-trail (a.k.a. provenance) meta- data for derived datasets and contributes to the veracity of results. Provenance is essential for reporting results, reporting the method followed, and adapting to changes in the datasets or tools. These functions, however, are hampered by the complexity of workflows and consequently the complexity of data-trails generated from their instrumented execution. In this paper we propose the generation of workflow description summaries in order to tackle workflow complexity. We elaborate reduction primitives for summarizing workflows, and show how prim- itives, as building blocks, can be used in conjunction with semantic workflow annotations to encode different summariza- tion strategies. We report on the effectiveness of the method through experimental evaluation using real-world workflows from the Taverna system.
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Khalid Belhajjame
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Anr cair meeting feb 2016
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Destacado
(18)
L'impatto politico delle curve di Kurzweil
L'impatto politico delle curve di Kurzweil
Linking the prospective and retrospective provenance of scripts
Linking the prospective and retrospective provenance of scripts
Edbt2014 talk
Edbt2014 talk
Ninja incontra il Collegio di Milano
Ninja incontra il Collegio di Milano
Opportunità per l'editoria
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Introduction to ProvBench @ Provenance Week 2014
Introduction to ProvBench @ Provenance Week 2014
Case studyworkshoponprovenance
Case studyworkshoponprovenance
Peer Production
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Edbt 2010, Belhajjame
Edbt 2010, Belhajjame
Why Workflows Break
Why Workflows Break
Tapp 2014 (belhajjame)
Tapp 2014 (belhajjame)
D-prov use-case
D-prov use-case
A Sightseeing Tour of Prov and Some of its Extensions
A Sightseeing Tour of Prov and Some of its Extensions
Reproducibility 1
Reproducibility 1
Small Is Beautiful: Summarizing Scientific Workflows Using Semantic Annotat...
Small Is Beautiful: Summarizing Scientific Workflows Using Semantic Annotat...
Ikc 2015
Ikc 2015
Black Man’s Grave Book Presentation to CCBC 4/13/10
Black Man’s Grave Book Presentation to CCBC 4/13/10
Anr cair meeting feb 2016
Anr cair meeting feb 2016
Presentation1
1.
e-Journalism 2010
2.
Fifteenth National Congress
on Rural Education in Canada
3.
“There is room
for difference in the world. That, perhaps, is the deepest and most important lesson.”
4.
5.
6.
“It’s not not
to be afraid, it’s not to be overcome by fear”
7.
8.
9.
10.
11.
Be sure to
Check out our blog!
12.
Welcome to National
Congress on Rural Education in Canada Sun West e-Journalism Team
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