Towards Cleaning-up Open Data Portals: A Metadata Reconciliation Approach

This paper presents an approach for metadata reconciliation, curation and linking for Open Governamental Data Portals (ODPs). ODPs have been lately the standard solution for governments willing to put their public data available for the society. Portal managers use several types of metadata to organize the datasets, one of the most important ones being the tags. However, the tagging process is subject to many problems, such as synonyms, ambiguity or incoherence, among others. As our empiric analysis of ODPs shows, these issues are currently prevalent in most ODPs and effectively hinders the reuse of Open Data. In order to address these problems, we develop and implement an approach for tag reconciliation in Open Data Portals, encompassing local actions related to individual portals, and global actions for adding a semantic metadata layer above individual portals. The local part aims to enhance the quality of tags in a single portal, and the global part is meant to interlink ODPs by establishing relations between tags.Comment: 8 pages,10 Figures - Under Revision for ICSC201

Ecoefficienza dei sistemi insediativi

Il vasto numero di realizzazioni sperimentali di nuovi assetti insediativi o di adeguamento di quelli esistenti, prodotte in particolare da paesi con una sviluppata tradizione di sensibilità alle tematiche ambientali, quali Olanda, Germania e Austria costituisce un patrimonio di conoscenze e un modello di riferimento più che un repertorio di pratiche da seguire pedissequamente. Nel momento cruciale della declinazione di questo patrimonio di esperienze in realtà e contesti geografici e culturali diversi, nella messa a sistema di azioni appropriate, le cosiddette “buone pratiche”, largamente sperimentate in termini di efficienza nei contesti specifici di appartenenza, si pone una questione metodologica di base, che comporta inevitabilmente forti ripercussioni sulla stessa configurazione degli assetti fisici degli interventi insediativi e, ancor prima, sui vincoli e sulle prescrizioni che regolano l’attività progettuale secondo modalità di prefigurazione talvolta precostituite. Tale questione rimanda alla improcrastinabile esigenza di sperimentazione di strumenti integrati a quelli normativi, di nuove procedure pianificatorie, programmatiche, operative e gestionali atte a governare la “questione ambientale” nella sua complessità spazio/temporale secondo modelli aperti, imperniati su una logica qualitativo-prestazionale e non più quantitativo-prescrittiva

BigDataOcean - Exploiting Oceans of Data for Maritime Applications

BigDataOcean - Exploiting Oceans of Data for Maritime Applications @EU Project Networking session of the 14th Extended Semantic Web Conference (ESWC'17

Preface of MEPDaW 2022: Managing the Evolution and Preservation of the Data Web

[no abstract available

Long‐term follow‐up comparison of two different bi‐layer dermal substitutes in tissue regeneration: Clinical outcomes and histological findings

Double layer dermal substitute (DS) consist of a 3-dimensional collagen structures and a superficial silicon layer that are positioned within the defect provide to promote tissue regeneration in skin wounds. DS often have unique physical characteristics due to differences in manufacturing techniques. The aim of this study is the clinical and histological comparison of Nevelia and Integra double layer DSs in patients with post-traumatic injury wounds. Thirty patients with post-traumatic wounds localised on the inferior limbs were randomised in 2 groups Nevelia or Integra, followed by autologous dermal epidermal graft (DEG). Clinical results were evaluated through the healing time; Manchester Scar Scale (MSS) and Visual Analog Scale (VAS) at 1, 2, and 3 weeks and after 1 and 3 years. Histological and immunohistochemical evaluation were performed at 0, 2, and 3 weeks. The difference in healing time between groups (P = .467, log-rank test), pain and self-estimation was not statistically significant after 35, 42, and 49 days and at 1-year follow up. Histological data showed evident healing of wound after 2 weeks compared with preoperative with both DSs. At 3 weeks reepithelialisation and dermal regeneration were evident with both substitutes; however Nevelia showed early regenerative properties in terms of epidermal proliferation and dermal renewal compared with Integra. Nevelia showed also a more evident angiogenesis vs Integra evaluated as α-SMA immunohistochemistry. Differences in the MSS score were statistically significant at 3 years follow up in favour of Nevelia group (P = .001). At long-term follow up, Nevelia showed a better clinical outcome measured as MSS score vs Integra measured as MSS. Histological and immunohistochemistry data showed that Nevelia allows faster neoangiogenesis and tissue regeneration with neoformed tissue architecture closer to the physiology of the skin

Preface of MEPDaW 2020: Managing the evolution and preservation of the data web

The MEPDaW workshop series targets one of the emerging and fundamental problems of the Web, specifically the management and preservation of evolving knowledge graphs. During the past six years, the workshop series has been gathering a community of researchers and practitioners around these challenges. To date, the series has successfully published more than 30 articles allowing more than 50 individual authors to present and share their ideas. This 6th edition, virtually co-located with the International Semantic Web Conference (ISWC 2020), gathered the community around nine research publications and one invited keynote presentation. The event took place online on the 1st of November, 2020

Formal Concept Analysis for Semantic Compression of Knowledge Graph Versions

International audienceRecent years have witnessed the increase of openly available knowledge graphs online. These graphs are often structured according to the W3C semantic web standard RDF. With this availability of information comes the challenge of coping with dataset versions as information may change in time and therefore deprecates the former knowledge graph. Several solutions have been proposed to deal with data versioning, mainly based on computing data deltas and having an incremental approach to keep track of the version history. In this article, we describe a novel method that relies on aggregating graph versions to obtain one single complete graph. Our solution semantically compresses similar and common edges together to obtain a final graph smaller than the sum of the distinct versioned ones. Technically, our method takes advantage of FCA to match graph elements together. We also describe how this compressed graph can be queried without being unzipped, using standard methods