1,072 research outputs found
A Federated Recommender System for Online Learning Environments
From e-commerce to social networking sites, recommender systems are gaining more and more interest. They provide connections, news, resources, or products of interest. This paper presents a federated recommender system, which exploits data from different online learning platforms and delivers personalized recommendation. The underlying educational objective is to enable academic institutions to provide a Web 2.0 dashboard bringing together open resources from the Cloud and proprietary content from in-house learning management systems. The paper describes the main aspects of the federated recommender system, including its adopted architecture, the common data model used to harvest the different learning platforms, the recommendation algorithm, as well as the recommendation display widget
May I Suggest? Comparing Three PLE Recommender Strategies
Personal learning environment (PLE) solutions aim at empowering learners to design (ICT and web-based) environments for their learning activities, mashingup content and people and apps for different learning contexts. Widely used in other application areas, recommender systems can be very useful for supporting learners in their PLE-based activities, to help discover relevant content, peers sharing similar learning interests or experts on a specific topic. In this paper we examine the utilization of recommender technology for PLEs. However, being confronted by a variety of educational contexts we present three strategies for providing PLE recommendations to learners. Consequently, we compare these recommender strategies by discussing their strengths and weaknesses in general
May I Suggest? Comparing Three PLE Recommender Strategies
Personal learning environment (PLE) solutions aim at empowering learners to design (ICT and web-based) environments for their learning activities, mashingup content and people and apps for different learning contexts. Widely used in other application areas, recommender systems can be very useful for supporting learners in their PLE-based activities, to help discover relevant content, peers sharing similar learning interests or experts on a specific topic. In this paper we examine the utilization of recommender technology for PLEs. However, being confronted by a variety of educational contexts we present three strategies for providing PLE recommendations to learners. Consequently, we compare these recommender strategies by discussing their strengths and weaknesses in general
User Modeling and User Profiling: A Comprehensive Survey
The integration of artificial intelligence (AI) into daily life, particularly
through information retrieval and recommender systems, has necessitated
advanced user modeling and profiling techniques to deliver personalized
experiences. These techniques aim to construct accurate user representations
based on the rich amounts of data generated through interactions with these
systems. This paper presents a comprehensive survey of the current state,
evolution, and future directions of user modeling and profiling research. We
provide a historical overview, tracing the development from early stereotype
models to the latest deep learning techniques, and propose a novel taxonomy
that encompasses all active topics in this research area, including recent
trends. Our survey highlights the paradigm shifts towards more sophisticated
user profiling methods, emphasizing implicit data collection, multi-behavior
modeling, and the integration of graph data structures. We also address the
critical need for privacy-preserving techniques and the push towards
explainability and fairness in user modeling approaches. By examining the
definitions of core terminology, we aim to clarify ambiguities and foster a
clearer understanding of the field by proposing two novel encyclopedic
definitions of the main terms. Furthermore, we explore the application of user
modeling in various domains, such as fake news detection, cybersecurity, and
personalized education. This survey serves as a comprehensive resource for
researchers and practitioners, offering insights into the evolution of user
modeling and profiling and guiding the development of more personalized,
ethical, and effective AI systems.Comment: 71 page
Learning object recommendation for teachers creating lesson plans
E-learning is one of the most popular and beneficial uses of the Internet today. However, it presents a problem known as the "information overload". Current systems of e-learning stored too many contents: on various topics, for different ages, etc..; therefore users often are not sure how to find what they are needing between all the contents available. And this problem is even greater when considering that most current e-learning systems have simple search engines as tools to find resources. In this paper a new algorithm that incorporates recommendations of learning objects from a repository on an e-learning system is presented. At the end, a case study is performed to evaluate the proposal. Techniques of artificial intelligence are used to filter and customize information and recommended items.XII Workshop de Tecnología Informática Aplicada en EducaciónRed de Universidades con Carreras de Informática (RedUNCI
On-Device Recommender Systems: A Comprehensive Survey
Recommender systems have been widely deployed in various real-world
applications to help users identify content of interest from massive amounts of
information. Traditional recommender systems work by collecting user-item
interaction data in a cloud-based data center and training a centralized model
to perform the recommendation service. However, such cloud-based recommender
systems (CloudRSs) inevitably suffer from excessive resource consumption,
response latency, as well as privacy and security risks concerning both data
and models. Recently, driven by the advances in storage, communication, and
computation capabilities of edge devices, there has been a shift of focus from
CloudRSs to on-device recommender systems (DeviceRSs), which leverage the
capabilities of edge devices to minimize centralized data storage requirements,
reduce the response latency caused by communication overheads, and enhance user
privacy and security by localizing data processing and model training. Despite
the rapid rise of DeviceRSs, there is a clear absence of timely literature
reviews that systematically introduce, categorize and contrast these methods.
To bridge this gap, we aim to provide a comprehensive survey of DeviceRSs,
covering three main aspects: (1) the deployment and inference of DeviceRSs (2)
the training and update of DeviceRSs (3) the security and privacy of DeviceRSs.
Furthermore, we provide a fine-grained and systematic taxonomy of the methods
involved in each aspect, followed by a discussion regarding challenges and
future research directions. This is the first comprehensive survey on DeviceRSs
that covers a spectrum of tasks to fit various needs. We believe this survey
will help readers effectively grasp the current research status in this field,
equip them with relevant technical foundations, and stimulate new research
ideas for developing DeviceRSs
Learning object recommendation for teachers creating lesson plans
E-learning is one of the most popular and beneficial uses of the Internet today. However, it presents a problem known as the "information overload". Current systems of e-learning stored too many contents: on various topics, for different ages, etc..; therefore users often are not sure how to find what they are needing between all the contents available. And this problem is even greater when considering that most current e-learning systems have simple search engines as tools to find resources. In this paper a new algorithm that incorporates recommendations of learning objects from a repository on an e-learning system is presented. At the end, a case study is performed to evaluate the proposal. Techniques of artificial intelligence are used to filter and customize information and recommended items.XII Workshop de Tecnología Informática Aplicada en EducaciónRed de Universidades con Carreras de Informática (RedUNCI
Trustworthy Recommender Systems
Recommender systems (RSs) aim to help users to effectively retrieve items of
their interests from a large catalogue. For a quite long period of time,
researchers and practitioners have been focusing on developing accurate RSs.
Recent years have witnessed an increasing number of threats to RSs, coming from
attacks, system and user generated noise, system bias. As a result, it has
become clear that a strict focus on RS accuracy is limited and the research
must consider other important factors, e.g., trustworthiness. For end users, a
trustworthy RS (TRS) should not only be accurate, but also transparent,
unbiased and fair as well as robust to noise or attacks. These observations
actually led to a paradigm shift of the research on RSs: from accuracy-oriented
RSs to TRSs. However, researchers lack a systematic overview and discussion of
the literature in this novel and fast developing field of TRSs. To this end, in
this paper, we provide an overview of TRSs, including a discussion of the
motivation and basic concepts of TRSs, a presentation of the challenges in
building TRSs, and a perspective on the future directions in this area. We also
provide a novel conceptual framework to support the construction of TRSs
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