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Recommendations systems (RS)

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lightbulbAbout this topic
Recommendation systems (RS) are algorithms and techniques designed to predict user preferences and suggest items or content based on individual user behavior, historical data, and item characteristics. They are widely used in various domains, including e-commerce, streaming services, and social media, to enhance user experience and engagement.
lightbulbAbout this topic
Recommendation systems (RS) are algorithms and techniques designed to predict user preferences and suggest items or content based on individual user behavior, historical data, and item characteristics. They are widely used in various domains, including e-commerce, streaming services, and social media, to enhance user experience and engagement.

Key research themes

1. How do different recommendation techniques address personalization and information overload in recommender systems?

This theme explores the core recommendation approaches—collaborative filtering, content-based filtering, demographic filtering, and hybrid methods—that underpin personalized recommendation systems. It examines how these techniques leverage user preferences, item features, and social or demographic data to mitigate information overload and better tailor recommendations to individual users. The importance of integrating multiple information sources to enhance recommendation accuracy and user satisfaction is highlighted.

Key finding: This foundational work formalizes collaborative filtering (CF) by modeling user-item interactions as a sparse ratings matrix and demonstrates how CF aggregates opinions within large communities to provide personalized... Read more
Key finding: This study analyzes multiple information sources—content features, user collaborative ratings, and demographic data—and shows that combining these information streams in a unified framework via hybrid filtering techniques... Read more
Key finding: This survey critiques individual recommendation approaches and argues for hybrid methods combining collaborative, content, demographic, utility, and knowledge-based filtering. It identifies limitations such as cold start and... Read more
Key finding: Providing a categorical overview, the paper classifies recommender systems into content-based, collaborative, demographic, and hybrid types, articulating their methodological differences, advantages, and limitations. It... Read more

2. What are the current best practices and challenges in evaluating recommender systems’ effectiveness and user experience?

This research theme addresses the methodologies, metrics, and experimental designs used to evaluate recommender systems. It encompasses the evaluation of predictive accuracy, robustness, scalability, diversity, and user-centric factors such as satisfaction and discovery. The challenges of offline, user study, and online A/B testing evaluation modes are contrasted, highlighting issues related to reproducibility, fairness, and multi-metric trade-offs in system assessment.

Key finding: The paper provides a comprehensive framework that categorizes recommender evaluation into offline, user studies, and online experiments, each suited to different property assessments. It highlights that accuracy alone is... Read more
Key finding: This work introduces iRec, a modular framework for reproducible evaluation of interactive recommendation agents using Multi-Armed Bandit formulations. It incorporates hyperparameter tuning, diverse datasets, multiple... Read more
Key finding: Through a systematic review, the paper identifies limitations of existing RS evaluation such as scalability and cold-start handling. It surveys evaluation approaches used in diverse RS applications and stresses the need for... Read more

3. How does machine learning, including deep learning and matrix factorization, enhance recommendation accuracy and address cold start and scalability issues in recommender systems?

This theme focuses on the application of machine learning models—ranging from traditional algorithms like nearest neighbors and matrix factorization to advanced deep learning architectures—in building recommendation systems. Emphasis is placed on their role in improving prediction accuracy, handling sparse data and cold start problems, and their adaptability to real-time and large-scale environments. The integration of domain-specific enhancements and hybrid architectures further illustrates ongoing methodological advancements.

Key finding: The study experimentally demonstrates that matrix factorization, specifically Singular Value Decomposition (SVD), significantly outperforms K-Nearest Neighbor (KNN) methods in academic book recommendation scenarios, achieving... Read more
Key finding: This paper surveys machine learning algorithms applied to recommender systems, detailing the merits and limitations of content-based and proximity-based filtering approaches. It further illustrates how machine learning... Read more
Key finding: Highlighting advances in deep learning, this paper presents deep neural networks as superior to traditional machine learning in capturing complex, unstructured data signals relevant to recommendation tasks. It asserts deep... Read more
Key finding: Using a combination of collaborative filtering and machine learning algorithms such as K-NN, this study improves movie recommendation accuracy by addressing data sparsity and enhancing user preference modeling. The paper... Read more

All papers in Recommendations systems (RS)

La publicidad en entornos de Digital Signage demanda el enriquecimiento de la aproximación clásica de recomendación orientada a individuos, a través de la entrega de anuncios para un grupo de personas que observa una pantalla pública.... more
The efficiency of multi agent system design mainly depends on the quality of a theoretical architecture of such systems. Therefore, quality issues should be considered at an early stage in the software development. Large systems such as... more
A trust-based recommendation model is regularized with user trust and item ratings called TrustSVD. Trust networks are large-world networks where many users are socially linked, suggesting the assumption of trust in recommendation... more
A promising evolution of the existing web where machine and people are in cooperation is the Semantic Web. That is, a machine’s represented and understandable web. This is against the existing web which is syntactic in nature where... more
This Paper presents a framework for modeling and designing of intelligent and adaptive interfaces for human computer interaction. Since interfaces along with their interaction styles have got a vital role to play in mass and massive... more
La publicidad en entornos de Digital Signage demanda el enriquecimiento de la aproximación clásica de recomendación orientada a individuos, a través de la entrega de anuncios para un grupo de personas que observa una pantalla pública.... more
Traditional Recommender Systems recommend items on the basis of a single criterion whereas rates of hotel food take many different criteria for each item. Although rating system of food recommender Systems have a promising accuracy,... more
Deep learning is an rising space of machine learning analysis. It includes multiple hidden layers of artificial neural networks. The deep learning methodology applies nonlinear transformation and model abstractions of high level in larger... more
An e-library system is a very important element of the internet age libraries. A library without it may face a lot of challenges like the lack of adequate visitation by the users. This paper presents an e-library system that was developed... more
Web recommendation systems usually brings a content list to users based on previous ratings made by them to other similar contents through some social voting mean. This paper aims to present a comparison of the main explicit rating... more
An e-library system is a very important element of the internet age libraries. A library without it may face a lot of challenges like the lack of adequate visitation by the users. This paper presents an e-library system that was developed... more
Cloud services are becoming domain specific and many new cloud services are being offered in the cloud services market almost every other day. The recommendation engines that could recommend the right domain specific cloud services are in... more
A promising evolution of the existing web where machine and people are in cooperation is the Semantic Web. That is, a machine’s represented and understandable web. This is against the existing web which is syntactic in nature where... more
A survey has been presented on the usage of ontology in various domains like Medical, Agriculture, Geosciences, Education, Marine, Communication, Computer, Chemical, Defence, Linguistic etc. A summary of the available ontology developed... more
The efficiency of multi agent system design mainly relies on the quality of a conceptual architecture of such systems. Hence, quality issues should be considered at an early stage in the software development process. Large systems such as... more
The extensive use of the Internet for data collection, information and knowledge has become a popular activity. Expert system, which provide consultation along with reasoning are more beneficial when made available on the World Wide Web.... more
A survey has been presented on the usage of ontology in various domains like Medical, Agriculture, Geosciences, Education, Marine, Communication, Computer, Chemical, Defence, Linguistic etc. A summary of the available ontology developed... more
With the proliferation of electronic commerce and knowledge economy environment both organizations and individuals generate and consume a large amount of online information. With the huge availability of product information on website,... more
Recommender systems are extensively seen as an effective means to combat information overload, as they redound us both narrow down the number of items to choose. They are seen as assistance us make better decisions at a lower transaction... more
In the last twelve years, the number of web user increases, so intensely leading to intense advancement in web services which leads to enlargement the usage data at higher rates. The purpose of a recommender System is to generate... more
The efficiency of multi agent system design mainly depends on the quality of a theoretical architecture of such systems. Therefore, quality issues should be considered at an early stage in the software development. Large systems such as... more
The efficiency of multi agent system design mainly relies on the quality of a conceptual architecture of such systems. Hence, quality issues should be considered at an early stage in the software development process. Large systems such as... more
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