Abstract
<p>Objetivo: analisar a estrutura fatorial da Escala de Percepção das Atividades de Enfermagem que Contribuem para a Qualidade dos Cuidados. Método: estudo metodológico com participação de 3.451 enfermeiros de 36 hospitais portugueses. Além da realização da análise fatorial confirmatória, para avaliação da confiabilidade do modelo fatorial obtido, utilizou-se o alfa de Cronbach e a confiabilidade compósita. Resultados: os pesos fatoriais da solução encontrada foram majoritariamente elevados; os valores dos índices de ajustamento do modelo foram razoáveis; o alfa de Cronbach foi elevado para a totalidade da escala e para cinco dimensões, sendo aceitável em apenas uma dimensão. A confiabilidade compósita também foi elevada em cinco dimensões, excepto em uma, considerada como aceitável. Todas as atividades apresentaram uma confiabilidade individual elevada. Conclusão: em comparação com a escala original, o modelo fatorial identificado contempla seis dimensões e não sete, produzindo uma escala confiável e válida, passível de aplicação no contexto hospitalar.</p><p>Descritores: Estudos de Validação. Análise Fatorial. Psicometria. Garantia da Qualidade dos Cuidados de Saúde.<br />Cuidados de Enfermagem.</p>

Abstract
Objective: to analyze the factorial structure of the Perception Scale of Nursing Activities that Contribute to the Quality of Care. Method: a methodological study with 3,451 nurses from 36 Portuguese hospitals. In addition to carrying out confirmatory factorial analysis, Cronbach’s alpha and composite reliability were used to assess the reliability of the obtained factorial model. Results: the factorial weights of the solution found were mostly high; the values of the model’s adjustment indexes were reasonable; Cronbach’s alpha was elevated for the entire scale and five dimensions, being acceptable in only one dimension. The composite reliability was also high in five dimensions, except for one, considered acceptable. All activities showed high individual reliability. Conclusion: Compared to the original scale, the identified factorial model contemplates six dimensions and not seven, producing a reliable and valid scale, which can be applied in the hospital context.

Abstract
Nuisance or unsolicited calls and instant messages come at any time in a variety of different ways. These calls would not only exasperate recipients with the unwanted ringing, impacting their productivity, but also lead to a direct financial loss to users and service providers. Telecommunication Service Providers (TSPs) often employ standalone detection systems to classify call originators as spammers or non-spammers using their behavioral patterns. These approaches perform well when spammers target a large number of recipients of one service provider. However, professional spammers try to evade the standalone systems by intelligently reducing the number of spam calls sent to one service provider, and instead distribute calls to the recipients of many service providers. Naturally, collaboration among service providers could provide an effective defense, but it brings the challenge of privacy protection and system resources required for the collaboration process. In this paper, we propose a novel decentralized collaborative system named privy for the effective blocking of spammers who target multiple TSPs. More specifically, we develop a system that aggregates the feedback scores reported by the collaborating TSPs without employing any trusted third party system, while preserving the privacy of users and collaborators. We evaluate the system performance of privy using both the synthetic and real call detail records. We find that privy can correctly block spammers in a quicker time, as compared to standalone systems. Further, we also analyze the security and privacy properties of the privy system under different adversarial models.

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The wine industry has a high business volume and adds value to the economy. This chapter intends to predict the wine firm performance of three of the most relevant Portuguese regions, by resorting to data available on the Portuguese Farm Accountancy Data Network (PTFADN, Resultados médios por exploração. Available on http://www.gpp.pt/index.php/rica/rede-de-informacao-de-contabilidades-agricolas-rica. Accessed 13 Mar 2018, 2001–2015). The existing social, economic and environmental parameters allowed us to perform function fitting with MATLAB, in order to attain information about the variable’s behaviour. Through the Agent-Based Model (ABM) simulations, it is possible to realize that, in general, the Alentejo region is substantially well prepared to deal with negative scenarios when compared with North and Central regions. Alternative scenarios can be performed in order to develop overall governmental policy recommendations, so as to ensure the sustainability of the three regions. © 2020, The Author(s).