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Publications

Publications by CRACS

2021

A Survey on Subgraph Counting: Concepts, Algorithms and Applications to Network Motifs and Graphlets

Authors
Ribeiro, P; Paredes, P; Silva, MEP; Aparicio, D; Silva, F;

Publication
CoRR

Abstract

2021

Time series analysis via network science: Concepts and algorithms

Authors
Silva, VF; Silva, ME; Ribeiro, P; Silva, F;

Publication
WIREs Data Mining and Knowledge Discovery

Abstract

2021

On the correctness and efficiency of a novel lock-free hash trie map design

Authors
Areias, M; Rocha, R;

Publication
J. Parallel Distributed Comput.

Abstract
Hash tries are a trie-based data structure with nearly ideal characteristics for the implementation of hash maps. In this paper, we present a novel, simple and scalable hash trie map design that fully supports the concurrent search, insert and remove operations on hash maps. To the best of our knowledge, our proposal is the first that puts together the following characteristics: (i) be lock-free; (ii) use fixed size data structures; and (iii) maintain the access to all internal data structures as persistent memory references. Our design is modular enough to allow different types of configurations aimed for different performances in memory usage and execution time and can be easily implemented in any type of language, library or within other complex data structures. We discuss in detail the key algorithms required to easily reproduce our implementation by others and we present a proof of correctness showing that our proposal is linearizable and lock-free for the search, insert and remove operations. Experimental results show that our proposal is quite competitive when compared against other state-of-the-art proposals implemented in Java. © 2021 Elsevier Inc.

2021

Evaluating cybersecurity attitudes and behaviors in Portuguese healthcare institutions

Authors
Nunes, P; Antunes, M; Silva, C;

Publication
Procedia Computer Science

Abstract

2021

Information Security and Cybersecurity Management: A Case Study with SMEs in Portugal

Authors
Antunes, M; Maximiano, M; Gomes, R; Pinto, D;

Publication
Journal of Cybersecurity and Privacy

Abstract
Information security plays a key role in enterprises management, as it deals with the confidentiality, privacy, integrity, and availability of one of their most valuable resources: data and information. Small and Medium-sized enterprises (SME) are seen as a blind spot in information security and cybersecurity management, which is mainly due to their size, regional and familiar scope, and financial resources. This paper presents an information security and cybersecurity management project, in which a methodology based on the well-known ISO-27001:2013 standard was designed and implemented in fifty SMEs that were located in the center region of Portugal. The project was conducted by a business association located at the center of Portugal and mainly participated by SMEs. The Polytechnic of Leiria and an IT auditing/consulting team were the other two entities that participated on the project. The characterisation of the participating enterprises, the ISO-27001:2013 based methodology developed and implemented in SMEs, as well as the results obtained in this case study, are depicted and analysed in the paper. The attained results show a clear benefit to the audited and intervened SMEs, being mainly attested by the increasing of their information security management robustness and collaborators’ cyberawareness.

2021

Simple Matrix Factorization Collaborative Filtering for Drug Repositioning on Cell Lines

Authors
Carrera, I; Tejera, E; Dutra, I;

Publication
Proceedings of the 14th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2021, Volume 5: HEALTHINF, Online Streaming, February 11-13, 2021.

Abstract

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