Stefano Paolozzi - Academia.edu (original) (raw)
Papers by Stefano Paolozzi
Proceedings of the 1st International Workshop on Ontology for e-Technologies OET 2009, 2009
Journal of e-learning and knowledge society, 2009
In this paper the authors present two software solutions, developed in the context of the Busines... more In this paper the authors present two software solutions, developed in the context of the Business Experiment in GRID project (BEinGRID), and discuss on their applicability in the creation and management of distributed collaborative learning environments. In particular, the presented solutions are deemed useful to complete the current tools for the creation and management of these environments by addressing gaping issues like trust management and ensuring quality of service. The software solutions have been validated in the context of a concrete case study related to the creation of a collaborative environment to support the execution and provision of Massive Multiplayer Online Games. As a case study, this paper will provide a description of the way the presented solutions can be applied to create collaborative learning environments, like for example the Virtual Learning Community defned in the context of the European Learning Grid Infrastructure project.
User Modeling still represents a key component for a large number of personalization systems. Mai... more User Modeling still represents a key component for a large number of personalization systems. Maintaining a model for each user, a system can successfully personalize its contents and use available resources accordingly. Ontologies, as a shared conceptualization of a particular domain, can be suitably exploited also in this area. In this paper we explain some concepts about user modeling, particularly focusing on scrutability and its importance in ontologybased user modeling systems.
Journal of E-Learning and Knowledge Society
In this paper the authors present two software solutions, developed in the context of the Busines... more In this paper the authors present two software solutions, developed in the context of the Business Experiment in GRID project (BEinGRID), and discuss on their applicability in the creation and management of distributed collaborative learning environments. In particular, the presented solutions are deemed useful to complete the current tools for the creation and management of these environments by addressing gaping issues like trust management and ensuring quality of service. The software solutions have been validated in the context of a concrete case study related to the creation of a collaborative environment to support the execution and provision of Massive Multiplayer Online Games. As a case Grid based software solutions to manage the lifecycle of collaborative learning environments study, this paper will provide a description of the way the presented solutions can be applied to create collaborative learning environments, like for example the Virtual Learning Community defined in...
The Semantic Web is gaining increasing interest to fulfill the need of sharing and reusing inform... more The Semantic Web is gaining increasing interest to fulfill the need of sharing and reusing information. In this context, RDF has been conceived to provide an easy way to represent any kind of data and metadata, according to a graph-based, lightweight model and a straight XML serialization. Although RDF has the advantage of being general and simple, it cannot be used as a storage model as it is, since it can be easily shown that even simple management operations involve serious performance limitations. Starting from an analysis of the current state of the art for RDF data management, we present in this paper a novel approach for storing, managing and processing RDF data in an effective and efficient way. The approach is based on an organization that is particularly suited for RDF constructs, but it can be easily extended to other models that relies on RDF, like RDFS and/or OWL. We refer to real world scenarios in which large RDF data repositories need to be navigated and processed, even if the schema is not known in advance. We consider complex data management operations, which go beyond simple selections or projections and involve the navigation of huge portions of data sources. A tool has been developed to test the feasibility of the approach over large RDF repositories (datasets of millions of triples). We compare the performance of the proposed framework with prior solutions and present experimental results supporting its effectiveness and efficiency.
We present ARISTOTELE, a platform for managing activities of knowledge-intensive enterprises, via... more We present ARISTOTELE, a platform for managing activities of knowledge-intensive enterprises, via the integration of tools and services for knowledge discovery, competence management, collaborative work and adaptive learning. We first present an overview of the platform with its main characteristics and its high-level tools. Then, we delve deeper into the conceptual models established for the representation of semantic data and knowledge coming from the inside as well as the outside of the adopting organization. Subsequently, we detail and motivate its architectural choices, by describing the services and data layers building it up and how they fit within the whole platform
2009 International Conference on Complex, Intelligent and Software Intensive Systems, 2009
M. Gaeta, P. Ritrovato - IEEE Members Department of Information Engineering and Applied Mathemati... more M. Gaeta, P. Ritrovato - IEEE Members Department of Information Engineering and Applied Mathematics, University of Salerno, Italy {gaeta, ritrovato}@diima.unisa.it ... V. Loia, M. Veniero - IEEE Members Department of Mathematics and Informatics University of Salerno Italy ...
2013 27th International Conference on Advanced Information Networking and Applications Workshops, 2013
We present the architecture of the ARISTOTELE platform, a semantic-based collaborative system for... more We present the architecture of the ARISTOTELE platform, a semantic-based collaborative system for managing enterprises and organizations, specifically designed to include a variety of features. These range from top-level functionalities like managing enterprise processes and building innovation, to finer-grained tasks like customized support for the daily activities of workers, including the creation and execution of personalized learning activities via an adaptive/non-adaptive strategy and the acquisition and usage of collaborative knowledge by the members of the organization. Here, we motivate ARISTOTELE's compliance with a known Enterprise Architecture framework and describe the design methodology behind the platform and its building blocks, beginning with its data layer and then proceeding to detailing its core services and the higher-level tools built on top of them.
Lecture Notes in Computer Science, 2012
ABSTRACT The adoption of high-level models for temporal, data-intensive Web sites is proposed tog... more ABSTRACT The adoption of high-level models for temporal, data-intensive Web sites is proposed together with a methodology for the design and development through a content management system (CMS). The process starts with a traditional ER scheme; the various steps lead to a temporal ER scheme, to a navigation scheme (called N-ER) and finally to a logical scheme (called T-ADM). The logical model allows the definition of page-schemes with temporal aspects (which could be related to the page as a whole or to individual components of it). Each model considers the temporal features that are relevant at the respective level. A content management tool associated with the methodology has been developed: from a typical content management interface it automatically generates both the relational database (with the temporal features needed) supporting the site and the actual Web pages, which can be dynamic (JSP) or static (plain HTML or XML), or a combination thereof. The tool also includes other typical features of content management all integrated with temporal features.
Information Systems: People, Organizations, Institutions, and Technologies, 2009
ABSTRACT The Semantic Web is an extension of the traditional Web aimed at facilitating informatio... more ABSTRACT The Semantic Web is an extension of the traditional Web aimed at facilitating information and knowledge sharing. In this context, RDF has been conceived as a means for a simple representation of any kind of data and metadata, according to a graph-based, lightweight model and a straight XML serialization. Although RDF has the advantage of being general and easy to use, it cannot be adopted as a storage model, since it can be easily shown that even simple data management operations yield serious performance problems. In this paper, we present a novel approach for storing, managing and processing RDF data in an effective and efficient way. The approach is based on a logical organization that is particularly suited for RDF constructs, but it can he easily extended to other RDF-based languages, such as OWL.
2008 19th International Conference on Database and Expert Systems Applications, 2008
Semantic annotation remains a significant part of the Semantic Web activities and a number of for... more Semantic annotation remains a significant part of the Semantic Web activities and a number of formalisms have been employed to annotate. Due to the impossibility of hav-ing a unique standard it may be important to have some techniques that allow the interoperability ...
Lecture Notes in Computer Science, 2013
We present the semantic-based architecture of the ARISTO-TELE platform, which is founded on the d... more We present the semantic-based architecture of the ARISTO-TELE platform, which is founded on the definition and development of models, methodologies, technologies and tools to support the emergence of competences and creativity within workers by self-organizing acquisition, processing and sharing of new information inside knowledge-intensive organizations. ARISTOTELE's architecture relies on semantic data by means of a number of conceptual models, which define the context of interest for an enterprise via a set of concepts and relationships among them. Instances of these models are used to annotate content data, thus creating a semantic network of information that actualizes the Linked Data paradigm within the information space of an organization. In this paper we describe the building elements of the ARISTOTELE platform, the conceptual models which lie behind them and the core Linked Data Layer component responsible of managing information for the whole system.
Lecture Notes in Computer Science, 2008
The growing importance of RDF as a tool for describing information on the Web has risen a number ... more The growing importance of RDF as a tool for describing information on the Web has risen a number of interesting works regarding the management of RDF documents. The effective management of RDF data has been an increasingly pressing active area of the current ...
Lecture Notes in Business Information Processing, 2008
Abstract. Sketch-based interfaces enable users to effortless and pow-erfully communication way to... more Abstract. Sketch-based interfaces enable users to effortless and pow-erfully communication way to represent concepts and/or commands, in different application domains, on different devices. Developing of a sketch-based interface for recognizing each specific domain is a ...
Handbook of Research on Mobile Multimedia, Second Edition
World Wide Web, 2011
The Semantic Web is gaining increasing interest to fulfill the need of sharing, retrieving, and r... more The Semantic Web is gaining increasing interest to fulfill the need of sharing, retrieving, and reusing information. In this context, the Resource Description Framework (RDF) has been conceived to provide an easy way to represent any kind of data and metadata, according to a lightweight model and syntaxes for serialization (RDF/XML, N3, etc.). Despite RDF has the advantage of being general and simple, it cannot be used as a storage model as it is, since it can be easily shown that even simple management operations involve serious performance limitations. In this paper we present a framework which provides a flexible and persistent layer relying on a novel storage model that guarantees good scalability and performance of query evaluation. The approach is based on the notion of construct, that represents a concept of the domain of interest. This makes the approach easily extensible and independent from the specific knowledge representation language. Based on this representation, reasoning capabilities are supported by a rule-based engine. Finally we present experimental results over real world scenarios to demonstrate the feasibility of the approach.
Semantic Web Information Management, 2009
Chapter 5 A Metamodel Approach to Semantic Web Data Management Roberto De Virgilio, Pierluigi Del... more Chapter 5 A Metamodel Approach to Semantic Web Data Management Roberto De Virgilio, Pierluigi Del Nostro, Giorgio Gianforme, and Stefano Paolozzi Abstract The Semantic Web is gaining increasing interest to fulfill the need of sharing, retrieving and reusing information. In this ...
Human-to-human conversation remains such a significant part of our working activities because of ... more Human-to-human conversation remains such a significant part of our working activities because of its naturalness. Multimodal interaction systems combine visual information with voice, gestures, and other modalities to provide flexible and powerful dialogue approaches. The use of integrated multiple input modes enables users to benefit from the natural approach used in human communication. In this paper, after introducing some definitions and concepts related to multimodal environment, we describe the different approaches used in the multimodal interaction fields showing both theoretical research and multimodal systems implementation. In particular, we will address those approaches that use the new semantic technologies as well as the ones related to the Semantic Web fields.
Proceedings of the 1st International Workshop on Ontology for e-Technologies OET 2009, 2009
Journal of e-learning and knowledge society, 2009
In this paper the authors present two software solutions, developed in the context of the Busines... more In this paper the authors present two software solutions, developed in the context of the Business Experiment in GRID project (BEinGRID), and discuss on their applicability in the creation and management of distributed collaborative learning environments. In particular, the presented solutions are deemed useful to complete the current tools for the creation and management of these environments by addressing gaping issues like trust management and ensuring quality of service. The software solutions have been validated in the context of a concrete case study related to the creation of a collaborative environment to support the execution and provision of Massive Multiplayer Online Games. As a case study, this paper will provide a description of the way the presented solutions can be applied to create collaborative learning environments, like for example the Virtual Learning Community defned in the context of the European Learning Grid Infrastructure project.
User Modeling still represents a key component for a large number of personalization systems. Mai... more User Modeling still represents a key component for a large number of personalization systems. Maintaining a model for each user, a system can successfully personalize its contents and use available resources accordingly. Ontologies, as a shared conceptualization of a particular domain, can be suitably exploited also in this area. In this paper we explain some concepts about user modeling, particularly focusing on scrutability and its importance in ontologybased user modeling systems.
Journal of E-Learning and Knowledge Society
In this paper the authors present two software solutions, developed in the context of the Busines... more In this paper the authors present two software solutions, developed in the context of the Business Experiment in GRID project (BEinGRID), and discuss on their applicability in the creation and management of distributed collaborative learning environments. In particular, the presented solutions are deemed useful to complete the current tools for the creation and management of these environments by addressing gaping issues like trust management and ensuring quality of service. The software solutions have been validated in the context of a concrete case study related to the creation of a collaborative environment to support the execution and provision of Massive Multiplayer Online Games. As a case Grid based software solutions to manage the lifecycle of collaborative learning environments study, this paper will provide a description of the way the presented solutions can be applied to create collaborative learning environments, like for example the Virtual Learning Community defined in...
The Semantic Web is gaining increasing interest to fulfill the need of sharing and reusing inform... more The Semantic Web is gaining increasing interest to fulfill the need of sharing and reusing information. In this context, RDF has been conceived to provide an easy way to represent any kind of data and metadata, according to a graph-based, lightweight model and a straight XML serialization. Although RDF has the advantage of being general and simple, it cannot be used as a storage model as it is, since it can be easily shown that even simple management operations involve serious performance limitations. Starting from an analysis of the current state of the art for RDF data management, we present in this paper a novel approach for storing, managing and processing RDF data in an effective and efficient way. The approach is based on an organization that is particularly suited for RDF constructs, but it can be easily extended to other models that relies on RDF, like RDFS and/or OWL. We refer to real world scenarios in which large RDF data repositories need to be navigated and processed, even if the schema is not known in advance. We consider complex data management operations, which go beyond simple selections or projections and involve the navigation of huge portions of data sources. A tool has been developed to test the feasibility of the approach over large RDF repositories (datasets of millions of triples). We compare the performance of the proposed framework with prior solutions and present experimental results supporting its effectiveness and efficiency.
We present ARISTOTELE, a platform for managing activities of knowledge-intensive enterprises, via... more We present ARISTOTELE, a platform for managing activities of knowledge-intensive enterprises, via the integration of tools and services for knowledge discovery, competence management, collaborative work and adaptive learning. We first present an overview of the platform with its main characteristics and its high-level tools. Then, we delve deeper into the conceptual models established for the representation of semantic data and knowledge coming from the inside as well as the outside of the adopting organization. Subsequently, we detail and motivate its architectural choices, by describing the services and data layers building it up and how they fit within the whole platform
2009 International Conference on Complex, Intelligent and Software Intensive Systems, 2009
M. Gaeta, P. Ritrovato - IEEE Members Department of Information Engineering and Applied Mathemati... more M. Gaeta, P. Ritrovato - IEEE Members Department of Information Engineering and Applied Mathematics, University of Salerno, Italy {gaeta, ritrovato}@diima.unisa.it ... V. Loia, M. Veniero - IEEE Members Department of Mathematics and Informatics University of Salerno Italy ...
2013 27th International Conference on Advanced Information Networking and Applications Workshops, 2013
We present the architecture of the ARISTOTELE platform, a semantic-based collaborative system for... more We present the architecture of the ARISTOTELE platform, a semantic-based collaborative system for managing enterprises and organizations, specifically designed to include a variety of features. These range from top-level functionalities like managing enterprise processes and building innovation, to finer-grained tasks like customized support for the daily activities of workers, including the creation and execution of personalized learning activities via an adaptive/non-adaptive strategy and the acquisition and usage of collaborative knowledge by the members of the organization. Here, we motivate ARISTOTELE's compliance with a known Enterprise Architecture framework and describe the design methodology behind the platform and its building blocks, beginning with its data layer and then proceeding to detailing its core services and the higher-level tools built on top of them.
Lecture Notes in Computer Science, 2012
ABSTRACT The adoption of high-level models for temporal, data-intensive Web sites is proposed tog... more ABSTRACT The adoption of high-level models for temporal, data-intensive Web sites is proposed together with a methodology for the design and development through a content management system (CMS). The process starts with a traditional ER scheme; the various steps lead to a temporal ER scheme, to a navigation scheme (called N-ER) and finally to a logical scheme (called T-ADM). The logical model allows the definition of page-schemes with temporal aspects (which could be related to the page as a whole or to individual components of it). Each model considers the temporal features that are relevant at the respective level. A content management tool associated with the methodology has been developed: from a typical content management interface it automatically generates both the relational database (with the temporal features needed) supporting the site and the actual Web pages, which can be dynamic (JSP) or static (plain HTML or XML), or a combination thereof. The tool also includes other typical features of content management all integrated with temporal features.
Information Systems: People, Organizations, Institutions, and Technologies, 2009
ABSTRACT The Semantic Web is an extension of the traditional Web aimed at facilitating informatio... more ABSTRACT The Semantic Web is an extension of the traditional Web aimed at facilitating information and knowledge sharing. In this context, RDF has been conceived as a means for a simple representation of any kind of data and metadata, according to a graph-based, lightweight model and a straight XML serialization. Although RDF has the advantage of being general and easy to use, it cannot be adopted as a storage model, since it can be easily shown that even simple data management operations yield serious performance problems. In this paper, we present a novel approach for storing, managing and processing RDF data in an effective and efficient way. The approach is based on a logical organization that is particularly suited for RDF constructs, but it can he easily extended to other RDF-based languages, such as OWL.
2008 19th International Conference on Database and Expert Systems Applications, 2008
Semantic annotation remains a significant part of the Semantic Web activities and a number of for... more Semantic annotation remains a significant part of the Semantic Web activities and a number of formalisms have been employed to annotate. Due to the impossibility of hav-ing a unique standard it may be important to have some techniques that allow the interoperability ...
Lecture Notes in Computer Science, 2013
We present the semantic-based architecture of the ARISTO-TELE platform, which is founded on the d... more We present the semantic-based architecture of the ARISTO-TELE platform, which is founded on the definition and development of models, methodologies, technologies and tools to support the emergence of competences and creativity within workers by self-organizing acquisition, processing and sharing of new information inside knowledge-intensive organizations. ARISTOTELE's architecture relies on semantic data by means of a number of conceptual models, which define the context of interest for an enterprise via a set of concepts and relationships among them. Instances of these models are used to annotate content data, thus creating a semantic network of information that actualizes the Linked Data paradigm within the information space of an organization. In this paper we describe the building elements of the ARISTOTELE platform, the conceptual models which lie behind them and the core Linked Data Layer component responsible of managing information for the whole system.
Lecture Notes in Computer Science, 2008
The growing importance of RDF as a tool for describing information on the Web has risen a number ... more The growing importance of RDF as a tool for describing information on the Web has risen a number of interesting works regarding the management of RDF documents. The effective management of RDF data has been an increasingly pressing active area of the current ...
Lecture Notes in Business Information Processing, 2008
Abstract. Sketch-based interfaces enable users to effortless and pow-erfully communication way to... more Abstract. Sketch-based interfaces enable users to effortless and pow-erfully communication way to represent concepts and/or commands, in different application domains, on different devices. Developing of a sketch-based interface for recognizing each specific domain is a ...
Handbook of Research on Mobile Multimedia, Second Edition
World Wide Web, 2011
The Semantic Web is gaining increasing interest to fulfill the need of sharing, retrieving, and r... more The Semantic Web is gaining increasing interest to fulfill the need of sharing, retrieving, and reusing information. In this context, the Resource Description Framework (RDF) has been conceived to provide an easy way to represent any kind of data and metadata, according to a lightweight model and syntaxes for serialization (RDF/XML, N3, etc.). Despite RDF has the advantage of being general and simple, it cannot be used as a storage model as it is, since it can be easily shown that even simple management operations involve serious performance limitations. In this paper we present a framework which provides a flexible and persistent layer relying on a novel storage model that guarantees good scalability and performance of query evaluation. The approach is based on the notion of construct, that represents a concept of the domain of interest. This makes the approach easily extensible and independent from the specific knowledge representation language. Based on this representation, reasoning capabilities are supported by a rule-based engine. Finally we present experimental results over real world scenarios to demonstrate the feasibility of the approach.
Semantic Web Information Management, 2009
Chapter 5 A Metamodel Approach to Semantic Web Data Management Roberto De Virgilio, Pierluigi Del... more Chapter 5 A Metamodel Approach to Semantic Web Data Management Roberto De Virgilio, Pierluigi Del Nostro, Giorgio Gianforme, and Stefano Paolozzi Abstract The Semantic Web is gaining increasing interest to fulfill the need of sharing, retrieving and reusing information. In this ...
Human-to-human conversation remains such a significant part of our working activities because of ... more Human-to-human conversation remains such a significant part of our working activities because of its naturalness. Multimodal interaction systems combine visual information with voice, gestures, and other modalities to provide flexible and powerful dialogue approaches. The use of integrated multiple input modes enables users to benefit from the natural approach used in human communication. In this paper, after introducing some definitions and concepts related to multimodal environment, we describe the different approaches used in the multimodal interaction fields showing both theoretical research and multimodal systems implementation. In particular, we will address those approaches that use the new semantic technologies as well as the ones related to the Semantic Web fields.