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Papers by Sandy El Helou

This position paper discusses the evaluation of personal learning environment (PLE) enablers alon... more This position paper discusses the evaluation of personal learning environment (PLE) enablers along four main axes including the delivery of personalized and contextualized recommendation services and the flexible representation of interaction and learning contexts.

Abstract: This paper discusses the 3A recommender system that targets CSCL (computersupported col... more Abstract: This paper discusses the 3A recommender system that targets CSCL (computersupported collaborative learning) and CSCW (computer-supported collaborative work) environments. The proposed system models user interactions in a heterogeneous graph. Then, it applies a personalized, contextual, and multi-relational ranking algorithm to simultaneously rank actors, activity spaces, and assets. The results of an empirical evaluation carried out on an Epinions dataset indicate that the proposed recommendation approach exploiting the trust and authorship networks performs better than user-based collaborative filtering in terms of recall.

In this contribution, we specify and categorize CoPs’ needs (this includes the analysis of CoPs p... more In this contribution, we specify and categorize CoPs’ needs (this includes the analysis of CoPs practices, resources and environments) in order to identify specific functions that meet these needs. This enables the efficient identification of possible interactions between PALETTE services’ categories that will be used as the basis to refine functional specifications of PALETTE services and enhance the development guidelines.

This paper presents a federated search and social recommendation widget. It describes the widget’... more This paper presents a federated search and social recommendation widget. It describes the widget’s interface and the underlying social recommendation engine. A preliminary evaluation of the widget’s usability and usefulness involving 15 subjects is also discussed. The evaluation helped identify usability problems that will be addressed prior to the widget’s usage in a real learning context.

Despite the extreme diversity of Web applications, one can find similarities among them. This pap... more Despite the extreme diversity of Web applications, one can find similarities among them. This paper proposes an answer to the question of knowing whether it is possible to conceptually represent different Web applications in a common manner such that they can generically be integrated in other Web applications. The 3A model developed at EPFL in the framework of the European PALETTE project is used to generalize the visual and functional properties of Web applications. A Web 2.0 personal learning environment based on the 3A model called eLogbook is used as a mashup container to integrate existing Web applications. The mapping procedure is described and illustrated with the example of an instant messaging application, showing that mashup is possible with 3A model.

After years of quest by the computer-supported collaborative work community for true user satisfa... more After years of quest by the computer-supported collaborative work community for true user satisfaction, social software and communities of practice turn out to be the enabling frameworks for natural and effective collaborative learning and knowledge management.

Digital Education Review, 2011

Resum Personal learning environment (PLE) solutions aim at empowering learners to design (ICT and... more Resum 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 ...

Proceedings of the 22nd International Conference on World Wide Web - WWW '13 Companion, 2013

Web Based Learning Solutions For Communities of Practice Developing Virtual Environments For Social and Pedagogical Advancement, 2010

In the framework of the PALETTE European research project, the Swiss federal Institute of Technol... more In the framework of the PALETTE European research project, the Swiss federal Institute of Technology in Lausanne (EPFL) is designing and experimenting with eLogbook, a Web-based collaborative environment designed for communities of practice. It enables users to manage joint ...

This position paper discusses the evaluation of personal learning environment (PLE) enablers alon... more This position paper discusses the evaluation of personal learning environment (PLE) enablers along four main axes including the delivery of personalized and contextualized recommendation services and the flexible representation of interaction and learning contexts.

Abstract: This paper discusses the 3A recommender system that targets CSCL (computersupported col... more Abstract: This paper discusses the 3A recommender system that targets CSCL (computersupported collaborative learning) and CSCW (computer-supported collaborative work) environments. The proposed system models user interactions in a heterogeneous graph. Then, it applies a personalized, contextual, and multi-relational ranking algorithm to simultaneously rank actors, activity spaces, and assets. The results of an empirical evaluation carried out on an Epinions dataset indicate that the proposed recommendation approach exploiting the trust and authorship networks performs better than user-based collaborative filtering in terms of recall.

In this contribution, we specify and categorize CoPs’ needs (this includes the analysis of CoPs p... more In this contribution, we specify and categorize CoPs’ needs (this includes the analysis of CoPs practices, resources and environments) in order to identify specific functions that meet these needs. This enables the efficient identification of possible interactions between PALETTE services’ categories that will be used as the basis to refine functional specifications of PALETTE services and enhance the development guidelines.

This paper presents a federated search and social recommendation widget. It describes the widget’... more This paper presents a federated search and social recommendation widget. It describes the widget’s interface and the underlying social recommendation engine. A preliminary evaluation of the widget’s usability and usefulness involving 15 subjects is also discussed. The evaluation helped identify usability problems that will be addressed prior to the widget’s usage in a real learning context.

Despite the extreme diversity of Web applications, one can find similarities among them. This pap... more Despite the extreme diversity of Web applications, one can find similarities among them. This paper proposes an answer to the question of knowing whether it is possible to conceptually represent different Web applications in a common manner such that they can generically be integrated in other Web applications. The 3A model developed at EPFL in the framework of the European PALETTE project is used to generalize the visual and functional properties of Web applications. A Web 2.0 personal learning environment based on the 3A model called eLogbook is used as a mashup container to integrate existing Web applications. The mapping procedure is described and illustrated with the example of an instant messaging application, showing that mashup is possible with 3A model.

After years of quest by the computer-supported collaborative work community for true user satisfa... more After years of quest by the computer-supported collaborative work community for true user satisfaction, social software and communities of practice turn out to be the enabling frameworks for natural and effective collaborative learning and knowledge management.

Digital Education Review, 2011

Resum Personal learning environment (PLE) solutions aim at empowering learners to design (ICT and... more Resum 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 ...

Proceedings of the 22nd International Conference on World Wide Web - WWW '13 Companion, 2013

Web Based Learning Solutions For Communities of Practice Developing Virtual Environments For Social and Pedagogical Advancement, 2010

In the framework of the PALETTE European research project, the Swiss federal Institute of Technol... more In the framework of the PALETTE European research project, the Swiss federal Institute of Technology in Lausanne (EPFL) is designing and experimenting with eLogbook, a Web-based collaborative environment designed for communities of practice. It enables users to manage joint ...

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