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<p>The App (<a class="moz-txt-link-freetext"
href="http://www.litislab.fr/equipe/app/">http://www.litislab.fr/equipe/app/</a>)
and MIND (<a class="moz-txt-link-freetext"
href="http://www.litislab.fr/equipe/mind/">http://www.litislab.fr/equipe/mind/</a>)
teams of the LITIS lab at INSA Rouen Normandy offer a postdoctoral
position for 12 months as part of the SAPhIRS project.<br>
</p>
<p>Keywords: machine learning, deep learning, recurrent neural
networks<br>
<br>
Description of the project and postdoctoral missions:<br>
<br>
Social networks are regularly used to express opinions on public
and political events or to disseminate opinions on sensitive
topics (hate speech, hooliganism, racism and nationalism, etc.).
The objective of the SAPhIRS project is to study opinion
propagation within social networks: to identify the key mechanisms
for disseminating information and opinion and to identify leaders
of influence. Particularly in Security field, we will focus on
Twitter detection and analysis of hamessages calling for hatred or
violence, monitoring their spread and detection of influential
actors. <br>
</p>
<p>As part of this project, we propose a 12-month postdoctoral
position in machine learning for opinion mining, sentiment
analysis and the detection of changes of opinion in Tweets. For
this purpose, we plan to use state-of-the-art methods in NLP based
on deep-learning neural networks, and especially recurrent neural
networks with internal memory such as LSTMs or GRUs.<br>
<br>
In other words, the main tasks would be:<br>
</p>
<ul>
<li>To annotate tweets automatically according to an opinion:
supervised classification problem;</li>
<li>To automatically identify messages containing the expression
of radical ideas, in English, in French and in Arabic chat
alphabet (transliteration of Arabic in Latin alphabet, also
called arabizi or arabish): problem of supervised learning on
unbalanced classes and possibly weakly supervised learning;</li>
<li>To detect changes of opinion in user Tweets sequences:
detection of anomalies and breaks in a time series.<br>
</li>
</ul>
<p>The main difficulties come from the encoding of input data (short
texts from Twitter, in French and Arabizi) for which language
models remain to be defined, and in the design and learning of
adapted recurrent models dedicated to these three tasks.<br>
<br>
Profiles:<br>
Candidates must have a doctorate in Machine Learning with, if
possible, experience in NLP and/or Deep Learning. Knowledge of
recurrent networks and Arabizi would also be a plus.</p>
Contractual conditions:<br>
The contract will be 12 months starting as soon as possible, with a
gross salary of approximately 3500 €. The recruited person will work
in the LITIS lab at INSA Rouen Normandy in Saint-Etienne-du-Rouvray.<br>
<br>
Application: CV, motivation letter, recommendation letters.<br>
<br>
Contact: <a class="moz-txt-link-abbreviated"
href="mailto:alexandre.pauchet@insa-rouen.fr">alexandre.pauchet@insa-rouen.fr</a>
<pre class="moz-signature" cols="72">--
Alexandre Pauchet
Associate Professor HDR
INSA Rouen Normandie - ASI Department - LITIS Lab
Phone: +33(0)2 32 95 98 58
Web: <a class="moz-txt-link-freetext" href="http://asi.insa-rouen.fr/enseignants/~apauchet/">http://asi.insa-rouen.fr/enseignants/~apauchet/</a></pre>
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