Zobrazeno 1 - 10
of 118
pro vyhledávání: '"Skiadopoulos, Spiros"'
Publikováno v:
2019 IEEE World Congress on Services (SERVICES)
The clear, social, and dark web have lately been identified as rich sources of valuable cyber-security information that -given the appropriate tools and methods-may be identified, crawled and subsequently leveraged to actionable cyber-threat intellig
Externí odkaz:
http://arxiv.org/abs/2109.06932
Autor:
Chatzigeorgakidis, Georgios, Skoutas, Dimitrios, Patroumpas, Kostas, Palpanas, Themis, Athanasiou, Spiros, Skiadopoulos, Spiros
Geolocated time series, i.e., time series associated with certain locations, abound in many modern applications. In this paper, we consider hybrid queries for retrieving geolocated time series based on filters that combine spatial distance and time s
Externí odkaz:
http://arxiv.org/abs/2104.09509
Autor:
Chatzigeorgakidis, Georgios, Skoutas, Dimitrios, Patroumpas, Kostas, Palpanas, Themis, Athanasiou, Spiros, Skiadopoulos, Spiros
Time series exploration and mining has many applications across several industrial and scientific domains. In this paper, we consider the problem of detecting locally similar pairs and groups, called bundles, over co-evolving time series. These are p
Externí odkaz:
http://arxiv.org/abs/2104.09417
Autor:
Chatzigeorgakidis, Georgios, Skoutas, Dimitrios, Patroumpas, Kostas, Palpanas, Themis, Athanasiou, Spiros, Skiadopoulos, Spiros
We address the problem of subsequence search in time series using Chebyshev distance, to which we refer as twin subsequence search. We first show how existing time series indices can be extended to perform twin subsequence search. Then, we introduce
Externí odkaz:
http://arxiv.org/abs/2104.06874
Akademický článek
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Autor:
Zervakis, Lefteris, Tryfonopoulos, Christos, Papadakis-Pesaresi, Antonios, Koubarakis, Manolis, Skiadopoulos, Spiros
We envision a publish/subscribe ontology system that is able to index millions of user subscriptions and filter them against ontology data that arrive in a streaming fashion. In this work, we propose a SPARQL extension appropriate for a publish/subsc
Externí odkaz:
http://arxiv.org/abs/1307.2015
Autor:
Chatzigeorgakidis, Georgios, Patroumpas, Kostas, Skoutas, Dimitrios, Athanasiou, Spiros, Skiadopoulos, Spiros
Publikováno v:
In Big Data Research March 2019 15:12-28
Publikováno v:
Proceedings of the VLDB Endowment (PVLDB), Vol. 5, No. 10, pp. 944-955 (2012)
In this work, we focus on protection against identity disclosure in the publication of sparse multidimensional data. Existing multidimensional anonymization techniquesa) protect the privacy of users either by altering the set of quasi-identifiers of
Externí odkaz:
http://arxiv.org/abs/1207.0135
Publikováno v:
Proceedings of the VLDB Endowment (PVLDB), Vol. 5, No. 1, pp. 49-60 (2011)
The suffix tree is a data structure for indexing strings. It is used in a variety of applications such as bioinformatics, time series analysis, clustering, text editing and data compression. However, when the string and the resulting suffix tree are
Externí odkaz:
http://arxiv.org/abs/1109.6884
Publikováno v:
In Data & Knowledge Engineering September 2018 117:98-113