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The process of data mining includes many steps, starting with the choice and preparation of data sources and ending with the presentation of the data mining results. In addition, it is generally accepted that the data mining is not a “one... more
The process of data mining includes many steps, starting with the choice and preparation of data sources and ending with the presentation of the data mining results. In addition, it is generally accepted that the data mining is not a “one shot” process, but rather the result is obtained through iterative refinement steps of algorithm choice, parameters settings and intermediate results presentation. An effective architecture for a data mining tool should therefore allow easy integration of three components: acquisition of data sources, data mining algorithms and results presentation. In this paper we present the architecture of a data mining tool which is under development in the framework of the project D21 (Data to Information), supported by the Italian MIUR (Ministry of Instruction, University and Research). The architecture is based on the concept of “metadata repository”: it is a specification of the data exchanged by the various modules which guarantees flexibility and extensi...
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ABSTRACT It is evident that in these last years there is a growing and persistent demand for more and more digital content in many different areas and for diverse purposes, with a particular emphasis in the cultural heritage sector.... more
ABSTRACT It is evident that in these last years there is a growing and persistent demand for more and more digital content in many different areas and for diverse purposes, with a particular emphasis in the cultural heritage sector. Typically, raw digital content is assembled in digital collections, but only the curation and enrichment of the raw material make it usefully available for working with it and exploiting it, and this subsequent embellishment phase is carried out in digital libraries. Digital libraries basically consist of large digital collections plus a set of tools that make content alive, that help the users to find it, make sense out of it, annotate it, comment it, share it in a community, collaborate on it, and so on. Thus, the evaluation of digital libraries and information access systems has to consider not only the quality of the digital collections and the preservation approach, but also the effectiveness and effcacy of the user-oriented tools they provide, in an overall user experience, having the ultimate goal of creating new knowledge.
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Computer Science, Management Information Systems, Information Security, Project Management, Technology Management, and 8 moreComputer Security, Disaster Management, Emergency Management, Handheld Device Use, Collaborative Work, Design and Development, Communications Technology, and Service Orientation
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Computer Science, Knowledge Management, Wireless Communications, Software Architecture, Workflow, and 12 moreEmergency Management, Mobile Computing, Communication Technology, Mobile Ad Hoc Network, Ad Hoc Networks, Handheld Device Use, Collaborative Work, Peer to Peer, Design and Development, Collaborative, Front end, and Collaborative Computing
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In this paper, we present Esteem (Emergent Semantics and cooperaTion in multi-knowledgE EnvironMents), a community-based P2P platform for supporting semantic collaboration among a set of independent peers, without prior reciprocal... more
In this paper, we present Esteem (Emergent Semantics and cooperaTion in multi-knowledgE EnvironMents), a community-based P2P platform for supporting semantic collaboration among a set of independent peers, without prior reciprocal knowledge and no predefined relationships. Goal of Esteem is to go beyond the existing state-of-the-art solutions for P2P knowledge sharing and to provide an integrated platform for both data and
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Information Systems, Computer Science, Information Retrieval, Human Computer Interaction, Data Mining, and 15 moreDatabases, Computer Software, Graphic User Interface Design, Conceptual Model, Graphical User Interfaces, Database Query, Query Expansion, Data Models, Entity Relationship Model, Ease of Use, QbD, Database Languages, Database, Programming language, and Query Formulation
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In this report we review and compare data mining methods and algorithms. After ashort introduction on the general concepts of data mining we focus on four specic topics, metaquerying, data clustering, similarity queries and visualization,... more
In this report we review and compare data mining methods and algorithms. After ashort introduction on the general concepts of data mining we focus on four specic topics, metaquerying, data clustering, similarity queries and visualization, and go deeper, analyzingthe various approaches and proposals known in the literature and, where applicable, in themarket. In particular, in each of the four parts an eort is made tond out a common modelto compare results and applicability.
DMengine architecture 6################## Tiziana Catarci, Stephen Kimani, Giuseppe Santucci## 5 Proposed Interface 9 6 Usability 25 7 Future Work 26################### Paolo Ciaccia, Giovambattista Ianni, Stefano Lodi, Luigi Palopoli,... more
DMengine architecture 6################## Tiziana Catarci, Stephen Kimani, Giuseppe Santucci## 5 Proposed Interface 9 6 Usability 25 7 Future Work 26################### Paolo Ciaccia, Giovambattista Ianni, Stefano Lodi, Luigi Palopoli, Marco Patella, Claudio Sartori### 8 Metarules interchange format 27 9 Clustering 32 10 Approximate Similarity Queries 37 2 It can neither be underestimated nor overestimated that the vast amounts of data still present formidable challenges to the ...
In this paper we describe two automatic inference mechanisms constructed around a personal ontology with the aim of providing human like assistance for form-filling. This is part of the wider vision of DELOS Task 4.8 Task-centered... more
In this paper we describe two automatic inference mechanisms constructed around a personal ontology with the aim of providing human like assistance for form-filling. This is part of the wider vision of DELOS Task 4.8 Task-centered Information Management, which aims to create a more activity or task-focused interaction environment for users, taking their individual library of digital information and turning it into a resource for automated support. The two techniques described in this paper are (i) a spreading activation algorithm ...
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Ontologies offer a flexible and expressive layer of abstraction, very useful for capturing the semantics of information repositories and facilitating their retrieval either by the user or by the system to support user tasks. This work... more
Ontologies offer a flexible and expressive layer of abstraction, very useful for capturing the semantics of information repositories and facilitating their retrieval either by the user or by the system to support user tasks. This work presents an ontology-based user profiler, in the context of a Personal Interaction Management System (PIMS). The profiler, based on an ontology of the users' domain, enables them to create their personal ontology by initially choosing one of the available template ontologies as a starting point, which ...
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In the present global society, information has to be exchangeable in open and dynamic environments, where interacting peers do not necessarily share a common understanding of the world at hand, and do not have a complete picture of the... more
In the present global society, information has to be exchangeable in open and dynamic environments, where interacting peers do not necessarily share a common understanding of the world at hand, and do not have a complete picture of the context where the interaction occurs. In this deliverable, we present the Esteem approach and the related peer architecture for emergent semantics in dynamic and multi-knowledge environments. In Esteem, semantic communities are built around declared interests in the form of manifesto ...
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In this paper a comparison is presented between the expressive power of generic graphical mechanisms and the various classes of queries (first-order, fixpoint, programming). A precise evaluation of the expressive power of the languages... more
In this paper a comparison is presented between the expressive power of generic graphical mechanisms and the various classes of queries (first-order, fixpoint, programming). A precise evaluation of the expressive power of the languages based on such mechanisms (ie purely graphical query languages) is shown. Moreover, an informal analysis is provided relatively to the more general class of the visual query languages, supporting also iconic interaction.
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In most recent Visual Query Systems #VQSs#, there is the attempt to address the di#erent needs of various classes of users by developing adaptiveinterfaces having a fundamental componentintheuser model module. Within this context, we... more
In most recent Visual Query Systems #VQSs#, there is the attempt to address the di#erent needs of various classes of users by developing adaptiveinterfaces having a fundamental componentintheuser model module. Within this context, we argue that the temporal issues are a key factor in modeling th user's interaction, and also in carrying out related usability analysis on VQSs. Hence, we propose a uniform framework for modeling and manipulating several kinds of time-based information related with VQSs, which exploits a graph-based formalism, equipped with visual temporal operators. In this paper, we concentrate on the time-based information which are derived from usability experiments. In particular, we show that the history of the user's interaction can be accessed and dynamically maintained by using such visual temporal operators. This approach is an e#ort towards clearly establishing a link between user interaction and modeling and data modeling and querying, allowing a st...
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Abstract This is the third International Workshop on Advanced Visual Interfaces and, as we had expected, the area has extended touching on many human issues as visual perception, cognition and mental system modelling. We are overwhelmed... more
Abstract This is the third International Workshop on Advanced Visual Interfaces and, as we had expected, the area has extended touching on many human issues as visual perception, cognition and mental system modelling. We are overwhelmed by images (from newspapers to movies to television) and yet have little time for correctly using all this huge information in our everyday tasks; even less in our job accomplishments.
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Mobile computing presents formidable challenges not only to the design of applications but also to each and every phase of the systems lifecycle. In particular, we observe that the HCI community is still struggling with the challenges... more
Mobile computing presents formidable challenges not only to the design of applications but also to each and every phase of the systems lifecycle. In particular, we observe that the HCI community is still struggling with the challenges that mobile computing poses to evaluation. Expert-based evaluation techniques are well known and they do enable a relatively quick and easy evaluation. Heuristic evaluation, in particular, has been widely applied and investigated, most likely due to its efficiency in detecting most of usability flaws at front of a rather limited investment of time and human resources in the evaluation. However, the capacity of expert-based techniques to capture contextual factors in mobile computing is a major concern. Previous research (Po et al, 2004) shows that it is possible to adapt heuristic evaluation to better meet the unique requirements of mobile computing. In this report, we describe a heuristic-based evaluation methodology that has been enriched toward capturing contextual requirements and thereby still draw from the inexpensive and flexible nature of expert-based evaluation.
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Most existing human-computer interfaces are now based on the WIMP (Windows, Icons, Menus, Pointers) paradigm and on the desktop metaphor. Each application is targeted towards editing one specific type of “document”. Current
Developing the semantic web is a key research challenge. The conference on Ontologies, DataBases, and Applications of Semantics for Large Scale Information Systems (ODBASE'04) provides a forum on ontologies and data semantics... more
Developing the semantic web is a key research challenge. The conference on Ontologies, DataBases, and Applications of Semantics for Large Scale Information Systems (ODBASE'04) provides a forum on ontologies and data semantics that is inclusive of the many computing disciplines involved in such a challenge, such as ontology management, information mining, knowledge representation, information integration, semantic web-services, and text processing. ODBASE 2004 also includes research and interesting ...
Abstract An easy-to-use visual authoring tool is proposed to help inexperienced users setting up an exhibition satisfying user-defined and structure-deriving constraints. Trials made with potential users yielded some considerations which... more
Abstract An easy-to-use visual authoring tool is proposed to help inexperienced users setting up an exhibition satisfying user-defined and structure-deriving constraints. Trials made with potential users yielded some considerations which have been taken as a basis for the tool interface design. A precise definition of the terms museum and visit is also given, and the placement algorithm is sketched
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Abstract We deal with the problem of automatic visualization of a large set of medical data and propose a framework that addresses the involved issues. Our approach does not depend on the particular data under analysis and its aim is to... more
Abstract We deal with the problem of automatic visualization of a large set of medical data and propose a framework that addresses the involved issues. Our approach does not depend on the particular data under analysis and its aim is to produce a highly effective visual representation. Such objective is made possible by the consistency of a set of logic rules contained in a knowledge base. These rules express facts and relationships about the visual domain, the data domain, the mapping between both domains, and the perceptual ...