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From:
"Mobasher, Bamshad" <[log in to unmask]>
Reply To:
Mobasher, Bamshad
Date:
Tue, 20 Nov 2018 18:52:19 +0000
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===========================
CALL FOR PAPERS: UMUAI
===========================

Special Issue on
SESSION-BASED and SEQUENTIAL RECOMMENDER SYSTEMS

Abstracts due: December 15, 2018 (Extended Deadline)
Papers due: March 10, 2019
===========================

USER MODELING AND USER-ADAPTED INTERACTION:
The Journal of Personalization Research
http://www.umuai.org
===========================

BACKGROUND AND SCOPE
======================
In many application domains of recommender systems, it is highly important to consider the sequential order of past actions of a user in the recommendation process. For example, in e-commerce settings, it is often necessary to take the last few actions of a customer into account to understand their short-term shopping intents. Similarly, in music or video streaming applications, next-item or similar-item recommendations should match the user's ongoing listening or viewing session to provide a satisfying user experience. Besides such often purely session-based recommendation scenarios, there are, however, also domains where the user's longer-term interests have to be considered as well. The sequential recommendation of a Point-of-Interest (POI) to visit next during a trip, for example, should not only be based on the users' current location or very last check-in at a POI, but also on their general traveling interests.

The described types of sequence-aware recommenders are usually based on sequential models, which are learned from time-ordered logs of user actions (e.g., item viewing or listening events, purchases, or user check-ins in social networks). However, these sequential logs not only allow to create models to adapt the recommendations to the user's current context; they also contain additional behavioural patterns that can be leveraged in the recommendation process. They, for example, allow to detect short-term popularity trends in the community and to learn repeated item purchase or consumption patterns. Such patterns have already been used in the literature to further improve the recommendations or to extend the scope of recommenders to reminders.
In recent years, we have observed an increased interest in session-based and sequential recommendation problems, which are highly relevant in practice but were underexplored in the academic literature for a long time.

The goal of the special issue is to consolidate the current state of the art in the area and to report on recent advances in the areas of session-based and sequential recommendations.

TOPICS
======
Session-based next-item recommendation with and without long-term user models
Combination of short- and long-term profiles
Sequential recommendation problems, e.g., next-basket or next-POI recommendation
Detection of information exploration patterns and other navigation patterns
Repeated item recommendation and reminders
Detection and consideration of community trends
Recommendation of sequences
Stream-based recommendation, e.g., for news feeds
Session-based similar item recommendation
Sequential recommendations for groups
Serendipity and diversity in sequential recommendations
User interaction with sequential and session-based recommenders
Trust, emotions, and personality and their impact on sequential recommendations
Application papers in areas such as:
- next-track music recommendation and playlist continuation
- streaming video recommendation
- web browsing prediction
- next-item recommendation in e-commerce
User studies, field studies, in-depth experimental offline evaluations
Methodological aspects (evaluation protocols, metrics, and data sets)

PAPER SUBMISSION & REVIEW PROCESS
==================================
Submissions will be pre-screened for topical fit based on extended abstracts. Extended abstracts (up to three pages in journal format) should be sent to [log in to unmask] Detailed instructions for paper submissions and updates will be posted at https://tinyurl.com/umuai-si-sessions

December 15, 2018 -- Abstract submission (Extended Deadline)
March 10, 2019 -- Full paper submission
June 14, 2019 -- Author notification
August 18, 2019 -- Revised versions due
October 21, 2019 -- Final notification
November 24, 2019 -- Camera-ready version due
Spring 2020 -- Publication of special issue

GUEST EDITORS / CONTACT
========================
Dietmar Jannach, AAU Klagenfurt, Austria, [log in to unmask] (main contact)
Bamshad Mobasher, DePaul University, USA, [log in to unmask]
Shlomo Berkovsky, Atlassian, Australia, [log in to unmask]



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