2nd International Interdisciplinary Workshop on Time Series Analysis (CNRS/MASTODONS)

12 déc. 2016, 13:00 → 13 déc. 2016, 18:00 Europe/Paris

Room Conseil (1) and Room Turing (2) (University Paris Descartes)

Cécile Cavet (APC), Edward Porter (APC/CNRS), Themis Palpanas (LIPADE - Paris Descartes University), Volker Beckmann (CNRS / IN2P3)

Modern day research has entered an age where, as experiments grow larger and more complex, the amount of recorded data is increasing exponentially. The analysis of the time-series data associated with these experiments is now beginning to push both computational power and resources to their limit. In order to analyse data from current and future experiments, new technology, and the development of more efficient and smarter algorithms, are required.

This workshop, supported by the Mastodons TimeClean proposal, brings together data analysts from the fields of astrophysics, biology, computing science and engineering, and will focus on advances in both academia and industry in both algorithmic development and computing technology in the area of time-series analysis.

On this event we will continue our discussion from the first workshop that was held in June 2016 at the APC laboratory.

Dinner venue Dinner venue

Poster poster_workshop.pdf

Slides Workshop Photos

lundi 12 décembre

13:30 → 13:50 Introduction: Time series analysis across disciplines

The study of time series is common to most scientific disciplines. Throughout the domains, similar questions are asked to the data, such as what are the trends (in time or along any other parameter) detectable in the data, is there recurrent behaviour, can correlations between parameters be established, how significant are they and are they causal? In addition, the evolution of computing power enables researchers to combine large data sets of different origin and from different fields in order to derive new insights. With these commonalities, why is interdisciplinary work in the domain of time series analysis still rather scarce? I will address some of the issues and point out developments that help us building up collaborations to benefit from each others expertise in this research area.

Orateur: Dr Volker Beckmann (CNRS / IN2P3)

Slides TIMECLEAN_workshop_opening_handout.pdf

13:50 → 14:20 Data series management: first results

Orateur: Prof. Themis Palpanas (LIPADE - Paris Descartes University)

Slides InterdisciplinaryDataSeriesManagement-todistr.pdf

14:20 → 14:50 Astronomy - photon: Fast timing variability in X-ray binaries: methods & diagnosis

In this talk I will first introduce the astrophysical systems at the core of my research, X-ray binaries (a.k.a. microquasars), and will in particular focus on their temporal properties. I will then show how we can try to understand the mechanisms at work in these sources through a timing approach, i.e. the study of their X-ray light curve  and associated evolution on long (day) timescale. Rapid (sub-second) variability is studied through Fourier analysis which has shown a vast richness of behavior in these sources, allowing to go deeper into several domains of (astro)-physics.

Orateur: Dr Jérome Rodriguez (CEA)

Slides Rodriguez_time_series_astronomy_X-ray_binaries.pdf

14:50 → 15:20 Astronomy - photon: X-ray variability in accreting supermassive black holes and relations to X-ray binaries

I will discuss how the variable X-ray emission from accreting supermassive black holes (or active galactic nuclei, AGN) can be used to extract information about the central compact object. I will show the evolution of the variability properties with black hole mass and accretion rate, within the sample of AGN and how this is related to variability in X-ray binaries. I will finally introduce some new fourier-time-delay techniques that carry the potential to echo-map the geometry of the emitting region.

Orateur: Dr Gabriele Ponti

Slides Talk_Ponti.pdf

15:20 → 15:50 Coffee break

15:50 → 16:50 Computer Science and Engineering

Orateur: Prof. Mueen Abdullah

Slides Mueen_presentation_TIMECLEAN_workshop.pdf

16:50 → 17:50 Astronomy - gravitationnal waves

Orateur: Dr Vivien Raymond (AEI-Potsdam)

Slides Raymond_2IIWTSA.pdf

19:00 → 22:30 Workshop dinner

mardi 13 décembre

09:30 → 10:00 Visualization and human-computer interaction methods: Challenges in Interactive Visual Exploration of Large Data Series

Orateur: Anna Gogolou

Slides GOGOLOU_Anna_Interactive_Visual_Exploration_of_Large_Data_Series.pdf

10:00 → 10:30 Neuroscience: focus on electrophysiology of epilepsy

There are many techniques used in neuroscience to explore the brain activity, going from electrophysiology to functional magnetic resonance imaging. All the techniques used, despite various spatial and temporal resolutions, have in common to record variations of brain activity in time. I’ll first briefly describe those different techniques and the different associated methods of analysis, and then focus on the electrophysiology of epilepsy. Patients with epilepsy present abnormal brain activity, like epileptic spikes and seizures that can be recorded with electroencephalography (EEG). In order to localize the region of the brain that produces this abnormal activity, EEG from the patients is recorded continuously for 2 to 3 weeks. Usual clinical practice involves a neurologist reviewing visually the signal in order to determine the spatial localization and the temporal dynamics of the epileptic activity. While several studies tried to develop an automatic and reliable detection / characterization of the epileptic events in time and space, no fully non supervised methods are commonly used by the neurologists. An efficient time series analysis could be of great interest to speed up the signal analysis and in turn to increase the number of patients handled.

Orateur: Dr Katia Lehongre (Brain and Spine Institute (ICM))

Slides TimeSeriesWorlshop_2016-12-13_KatiaLehongre.pptx

10:30 → 11:00 Coffee break

11:00 → 12:15 Hands on session for GW data analysis

You can find all the hands-on information in the text document.

Orateurs: Dr Vivien Raymond, Yann Bouffanais

notes Note

12:15 → 13:00 Musical time series and artificial creative intelligence

Orateur: Prof. Philippe Esling (IRCAM, Pierre and Marie Curie University)

Slides Esling_Presentation.pptx

13:00 → 14:00 Lunch break

14:00 → 15:15 Hands-on session on visualization and human-computer interaction methods: Designing interactive visualization techniques for large data series

Orateurs: Anastasia Bezerianos (Paris-Sud Univ/CNRS/Inria), Anna Gogolou (Inria/Univ.Paris-Saclay/Paris-Descartes Univ), Fanis Tsandilas (Inria/Paris-Sud Univ/CNRS/Paris-Saclay Univ)

Slides TimeSerie-visualization-hands-on.pdf

15:15 → 15:45 Coffee Break

15:45 → 16:45 Computer science: Privacy-Preserving Use of Individual Smart Metering Data for Customer Services

Orateur: Dr Georges Hebrail (EDF)

Transparents Hebrail_prez_13_12_2016_time_series-todistr.pdf

16:45 → 17:30 Discussion: Major Gains and Challenges in Interdisciplinary Time Series Analysis