Reference number: NL4XAI- ESR7
PhD research topic: Argumentation-based multi-agent recommender system
Objectives: This PhD thesis will explore an interactive distributed model in which recommenders become active software agents that accompany the recommendations with arguments. This approach is radically different with previous recommender system approaches (content-based or not) where the experiences of users are represented as passive data in a database. These recommender agents will be able then to engage in argumentative dialogues with other recommenders to agree (or not) on a recommendation to the user. A mediator may pair recommenders according to different criteria (e.g., similarity of profiles with the user, dissimilarity of their experiences) and then aggregate the outcomes of the different dialogues into a meaningful recommendation to the user that will be duly justified by arguments.
Initially, publicly available data sets will be used for validation of the approach, in particular, the Sushi data set73, which offers a well-designed source of preference data that can be used to form arguments for supporting recommendations.
The approach will address two main issues still remaining in the recommender systems – the sensitivity of the precision of preference estimation with respect to the measurement error in the profile data; and the effect of central tendency effect (the tendency to select neutral positions on rating scales).
One use case will be identified where the results of the research work will be applied and evaluated.
Host institution: Agencia Estatal del Consejo Superior de Investigaciones Científicas- CSIC (Spain)
PhD Enrolment: Universitat Autònoma de Barcelona-UAB (Spain)
The UAB is the first Spanish university in the QS Ranking of World Universities, and it holds leading global positions in the most prestigious and influential university rankings.The Universitat Autònoma de Barcelona debuted recently in the Global University Employability Ranking and occupies position 136 worldwide and is first among all public universities in Spain. More information at https://www.uab.cat/web/universitat-autonoma-de-barcelona-1345467954774.html
Secondments: The ESR will enjoy two secondments of 2 months each at the premises of two project’s members as detailed in the following table.
Main Supervisor: Prof. Dr. Carles Sierra, Artificial Intelligence Research Institute (IIIACSIC) – Agencia Estatal del Consejo Superior de Investigaciones Científicas (CSIC), sierra en iiia.csic.es
PhD Co-Supervisor: Dr Katarzyna Budzynska, Warsaw University of Technology (WUT)
Mobility: At the time of recruitment, the researcher must not have resided or carried out his/her main activity (work, studies, etc.) in Spain for more than 12 months in the 3 years prior to recruitment date. Time spent as part of a procedure for obtaining refugee status under the Geneva Convention is not taken into account.
Career: When starting their contract (expected in November2022), selected researchers should be within the first four years of his/her research careers and not have been awarded a doctoral degree prior to the application.
The candidate must be working exclusively for the action
Degree: Degree in Computer Science (or similar), Master degree in Artificial Intelligence, Computer Science or equivalent providing access to a PhD program.
Experience in Artificial Intelligence
Programming skills: Python
Language: Excellent command of English, together with good academic writing and presentation skills.
Background in Natural Language Processing and Mathematical Modelling
Ability to work independently and as part of a team.
Strong motivation to pursue a PhD degree.
Strong interest in interdisciplinary scientific work
Estimated starting date: 1st November 2022
Contract: Full-time contract
from the starting date till 30 September 2023, including 2 secondments at other consortium members’ premises (see Secondment section)
Possibility of extending the contract until the end of the PhD, subject to availability of funding and to the fulfilment of objectives and quality of the results obtained by the PhD fellow.
Salary: Gross salary of 37.434 €/Year, if the researcher has no family or 40.434 €/Year if the researcher is married or has dependent children for the purposes of the MSCA.
Salary includes medical care coverage and work accident insurance through the Spanish Health Care System, providing access to the Spanish public health care system for candidates, as well as pension and unemployment benefits.
More information: https://nl4xai.eu/open_position/esr72022-argumentation-based-multi-agent-recommender-system/" class="wiki wikinew text-danger tips">NL4XAI website