Search Results for author: Dietmar Jannach

Found 45 papers, 17 papers with code

Investigating Reproducibility in Deep Learning-Based Software Fault Prediction

no code implementations8 Feb 2024 Adil Mukhtar, Dietmar Jannach, Franz Wotawa

In these cases, it therefore remains challenging to exactly reproduce the results in the current research literature.

Improving Sequential Recommendations with LLMs

1 code implementation2 Feb 2024 Artun Boz, Wouter Zorgdrager, Zoe Kotti, Jesse Harte, Panos Louridas, Dietmar Jannach, Marios Fragkoulis

We conduct extensive experiments on three datasets and explore a large variety of configurations, including different language models and baseline recommendation models, to obtain a comprehensive picture of the performance of each approach.

Sequential Recommendation

Performance Comparison of Session-based Recommendation Algorithms based on GNNs

no code implementations27 Dec 2023 Faisal Shehzad, Dietmar Jannach

In session-based recommendation settings, a recommender system has to base its suggestions on the user interactions that are ob served in an ongoing session.

Session-Based Recommendations

Team-related Features in Code Review Prediction Models

no code implementations11 Dec 2023 Eduardo Witter, Ingrid Nunes, Dietmar Jannach

In this paper, we propose the use of team-related features to improve the performance of predictions that are helpful to build code reviewer recommenders, with our target predictions being the identification of reviewers that would participate in a review and the provided amount of feedback.

feature selection

Leveraging Large Language Models for Sequential Recommendation

1 code implementation17 Sep 2023 Jesse Harte, Wouter Zorgdrager, Panos Louridas, Asterios Katsifodimos, Dietmar Jannach, Marios Fragkoulis

Sequential recommendation problems have received increasing attention in research during the past few years, leading to the inception of a large variety of algorithmic approaches.

Sequential Recommendation

Economic Recommender Systems -- A Systematic Review

no code implementations23 Aug 2023 Alvise De Biasio, Nicolò Navarin, Dietmar Jannach

In this work, we survey the existing literature on what we call Economic Recommender Systems based on a systematic review approach that helped us identify 133 relevant papers.

Recommendation Systems

On the Opportunities and Challenges of Offline Reinforcement Learning for Recommender Systems

no code implementations22 Aug 2023 Xiaocong Chen, Siyu Wang, Julian McAuley, Dietmar Jannach, Lina Yao

Offline reinforcement learning empowers agents to glean insights from offline datasets and deploy learned policies in online settings.

Recommendation Systems reinforcement-learning

A Survey on Point-of-Interest Recommendations Leveraging Heterogeneous Data

no code implementations14 Aug 2023 Zehui Wang, Wolfram Höpken, Dietmar Jannach

In this domain, recommender systems are for example tasked with providing personalized recommendations for transportation, accommodation, points-of-interest (POIs), etc.

Recommendation Systems

A Survey on Popularity Bias in Recommender Systems

no code implementations2 Aug 2023 Anastasiia Klimashevskaia, Dietmar Jannach, Mehdi Elahi, Christoph Trattner

We furthermore critically discuss today's literature, where we observe that the research is almost entirely based on computational experiments and on certain assumptions regarding the practical effects of including long-tail items in the recommendations.

Recommendation Systems

Semi-supervised Adversarial Learning for Complementary Item Recommendation

no code implementations10 Mar 2023 Koby Bibas, Oren Sar Shalom, Dietmar Jannach

In this work, we propose a novel approach that can leverage both item side-information and labeled complementary item pairs to generate effective complementary recommendations for cold items, i. e., for items for which no co-purchase statistics yet exist.

Recommender Systems: A Primer

no code implementations6 Feb 2023 Pablo Castells, Dietmar Jannach

Personalized recommendations have become a common feature of modern online services, including most major e-commerce sites, media platforms and social networks.

Retrieval Session-Based Recommendations

Collaborative Image Understanding

no code implementations21 Oct 2022 Koby Bibas, Oren Sar Shalom, Dietmar Jannach

A series of experiments on datasets from e-commerce and social media demonstrates that considering collaborative signals helps to significantly improve the performance of the main task of image classification by up to 9. 1%.

Image Classification

Multi-Objective Recommender Systems: Survey and Challenges

no code implementations19 Oct 2022 Dietmar Jannach

Traditionally, recommender systems research predominantly focuses on developing machine learning algorithms that aim to predict which content is relevant for individual users.

Recommendation Systems

INFACT: An Online Human Evaluation Framework for Conversational Recommendation

1 code implementation7 Sep 2022 Ahtsham Manzoor, Dietmar Jannach

Conversational recommender systems (CRS) are interactive agents that support their users in recommendation-related goals through multi-turn conversations.

Recommendation Systems

Evaluating Conversational Recommender Systems: A Landscape of Research

no code implementations25 Aug 2022 Dietmar Jannach

Conversational recommender systems aim to interactively support online users in their information search and decision-making processes in an intuitive way.

Decision Making Recommendation Systems

INSPIRED2: An Improved Dataset for Sociable Conversational Recommendation

1 code implementation8 Aug 2022 Ahtsham Manzoor, Dietmar Jannach

A recent example of such a dataset is INSPIRED, which consists of recommendation dialogs for sociable conversational recommendation, where items and entities were annotated using automatic keyword or pattern matching techniques.

Recommendation Systems Retrieval

Fairness in Recommender Systems: Research Landscape and Future Directions

1 code implementation23 May 2022 Yashar Deldjoo, Dietmar Jannach, Alejandro Bellogin, Alessandro Difonzo, Dario Zanzonelli

In this survey, we first review the fundamental concepts and notions of fairness that were put forward in the area in the recent past.

Fairness Recommendation Systems

Conversational Recommendation: A Grand AI Challenge

no code implementations17 Mar 2022 Dietmar Jannach, Li Chen

Animated avatars, which look and talk like humans, are iconic visions of the future of AI-powered systems.

Recommendation Systems

Balancing Consumer and Business Value of Recommender Systems: A Simulation-based Analysis

1 code implementation10 Mar 2022 Nada Ghanem, Stephan Leitner, Dietmar Jannach

Our simulations show that a hybrid strategy that puts more weight on consumer utility but without ignoring profitability considerations leads to the highest cumulative profit in the long run.

Recommendation Systems

Conversational Recommendation: Theoretical Model and Complexity Analysis

no code implementations10 Nov 2021 Tommaso Di Noia, Francesco Donini, Dietmar Jannach, Fedelucio Narducci, Claudio Pomo

With this work, we complement empirical research with a theoretical, domain-independent model of conversational recommendation.

Recommendation Systems

Towards Retrieval-based Conversational Recommendation

1 code implementation6 Sep 2021 Ahtsham Manzoor, Dietmar Jannach

One main challenge is that these generated responses both have to be appropriate for the given dialog context and must be grammatically and semantically correct.

Recommendation Systems Retrieval +1

Understanding Longitudinal Dynamics of Recommender Systems with Agent-Based Modeling and Simulation

no code implementations25 Aug 2021 Gediminas Adomavicius, Dietmar Jannach, Stephan Leitner, Jingjing Zhang

Today's research in recommender systems is largely based on experimental designs that are static in a sense that they do not consider potential longitudinal effects of providing recommendations to users.

Recommendation Systems

Digital Nudging with Recommender Systems: Survey and Future Directions

no code implementations6 Nov 2020 Mathias Jesse, Dietmar Jannach

These systems thereby influence which information is easily accessible to us and thus affect our decision-making processes though the automated selection and ranking of the presented content.

Decision Making Recommendation Systems

A Black-Box Attack Model for Visually-Aware Recommender Systems

no code implementations5 Nov 2020 Rami Cohen, Oren Sar Shalom, Dietmar Jannach, Amihood Amir

Due to the advances in deep learning, visually-aware recommender systems (RS) have recently attracted increased research interest.

Recommendation Systems

Exploring Longitudinal Effects of Session-based Recommendations

1 code implementation17 Aug 2020 Andres Ferraro, Dietmar Jannach, Xavier Serra

Specifically, we analyze to what extent algorithms of different types may lead to concentration effects over time.

Re-Ranking Session-Based Recommendations

Critically Examining the Claimed Value of Convolutions over User-Item Embedding Maps for Recommender Systems

1 code implementation23 Jul 2020 Maurizio Ferrari Dacrema, Federico Parroni, Paolo Cremonesi, Dietmar Jannach

In recent years, algorithm research in the area of recommender systems has shifted from matrix factorization techniques and their latent factor models to neural approaches.

Recommendation Systems

Hybrid Session-based News Recommendation using Recurrent Neural Networks

no code implementations22 Jun 2020 Gabriel de Souza P. Moreira, Dietmar Jannach, Adilson Marques da Cunha

We describe a hybrid meta-architecture -- the CHAMELEON -- for session-based news recommendation that is able to leverage a variety of information types using Recurrent Neural Networks.

News Recommendation

A systematic review and taxonomy of explanations in decision support and recommender systems

no code implementations15 Jun 2020 Ingrid Nunes, Dietmar Jannach

With the recent advances in the field of artificial intelligence, an increasing number of decision-making tasks are delegated to software systems.

Decision Making Recommendation Systems

A Survey on Conversational Recommender Systems

no code implementations1 Apr 2020 Dietmar Jannach, Ahtsham Manzoor, Wanling Cai, Li Chen

Recommender systems are software applications that help users to find items of interest in situations of information overload.

Chatbot Recommendation Systems

A Troubling Analysis of Reproducibility and Progress in Recommender Systems Research

1 code implementation18 Nov 2019 Maurizio Ferrari Dacrema, Simone Boglio, Paolo Cremonesi, Dietmar Jannach

In our analysis, we discuss common issues in today's research practice, which, despite the many papers that are published on the topic, have apparently led the field to a certain level of stagnation.

Collaborative Filtering Recommendation Systems

Empirical Analysis of Session-Based Recommendation Algorithms

1 code implementation28 Oct 2019 Malte Ludewig, Noemi Mauro, Sara Latifi, Dietmar Jannach

However, previous research indicates that today's complex neural recommendation methods are not always better than comparably simple algorithms in terms of prediction accuracy.

Session-Based Recommendations

Measuring the Business Value of Recommender Systems

no code implementations22 Aug 2019 Dietmar Jannach, Michael Jugovac

Recommender Systems are nowadays successfully used by all major web sites (from e-commerce to social media) to filter content and make suggestions in a personalized way.

Recommendation Systems

On the Importance of News Content Representation in Hybrid Neural Session-based Recommender Systems

2 code implementations12 Jul 2019 Gabriel de Souza P. Moreira, Dietmar Jannach, Adilson Marques da Cunha

A particular problem in that context is that online readers are often anonymous, which means that this personalization can only be based on the last few recorded interactions with the user, a setting named session-based recommendation.

Session-Based Recommendations

Beyond Personalization: Research Directions in Multistakeholder Recommendation

no code implementations1 May 2019 Himan Abdollahpouri, Gediminas Adomavicius, Robin Burke, Ido Guy, Dietmar Jannach, Toshihiro Kamishima, Jan Krasnodebski, Luiz Pizzato

Recommender systems are personalized information access applications; they are ubiquitous in today's online environment, and effective at finding items that meet user needs and tastes.

Fairness Recommendation Systems

Contextual Hybrid Session-based News Recommendation with Recurrent Neural Networks

2 code implementations15 Apr 2019 Gabriel de Souza Pereira Moreira, Dietmar Jannach, Adilson Marques da Cunha

The recommendation of news is often considered to be challenging, since the relevance of an article for a user can depend on a variety of factors, including the user's short-term reading interests, the reader's context, or the recency or popularity of an article.

News Recommendation Session-Based Recommendations

Are Query-Based Ontology Debuggers Really Helping Knowledge Engineers?

no code implementations2 Apr 2019 Patrick Rodler, Dietmar Jannach, Konstantin Schekotihin, Philipp Fleiss

Tool support for the localization and repair of faults within knowledge bases of such systems can therefore be essential for their practical success.

Evaluation of Session-based Recommendation Algorithms

3 code implementations26 Mar 2018 Malte Ludewig, Dietmar Jannach

In many real-world applications, however, such long-term profiles often do not exist and recommendations therefore have to be made solely based on the observed behavior of a user during an ongoing session.

Session-Based Recommendations

Sequence-Aware Recommender Systems

3 code implementations23 Feb 2018 Massimo Quadrana, Paolo Cremonesi, Dietmar Jannach

In this work we review existing works that consider information from such sequentially-ordered user- item interaction logs in the recommendation process.

Benchmarking Matrix Completion +1

When Recurrent Neural Networks meet the Neighborhood for Session-Based Recommendation

no code implementations1 Aug 2017 Dietmar Jannach, Malte Ludewig

Deep learning methods have led to substantial progress in various application fields of AI, and in recent years a number of proposals were made to improve recommender systems with artificial neural networks.

Session-Based Recommendations

Price and Profit Awareness in Recommender Systems

no code implementations25 Jul 2017 Dietmar Jannach, Gediminas Adomavicius

Academic research in the field of recommender systems mainly focuses on the problem of maximizing the users' utility by trying to identify the most relevant items for each user.

Recommendation Systems

Cannot find the paper you are looking for? You can Submit a new open access paper.