UAVs are increasingly being used in various domains, from personal and commercial applications to military operations. Ensuring the security and trustworthiness of UAV communications is crucial, and blockchain technology has been explored as a solution. However, privacy remains a challenge, especially in public blockchains.
View Article and Find Full Text PDFOne of the uses of Helmholtz resonators is as sound absorbers for room acoustic applications, especially for the low frequency range. Their efficiency is centered around their resonance frequency which mainly depends on elements of their geometry such as the resonator volume and neck dimensions. Incorporating additional necks on the body of a Helmholtz resonator (depending on whether they are open or closed) has been found to alter the resulting resonance frequency.
View Article and Find Full Text PDFThe purpose of this article is to assess the justness or unjustness of the securitization of Covid-19 in the Greek case. To do so, the Just Securitization Theory, is used as articulated by Rita Floyd to examine the following research question: Was there a just initiation and just conduct in the case of the securitization of Covid-19 in Greece? To answer this question, the methodology employed is a mix of methods proposed by Rita Floyd, such as the recourse to natural sciences to establish the actuality of the threat in combination with discourse analysis in political and scientific actors' speech acts and qualitative analysis of legal policy documents. In total, 85 statements and legal documents were examined for the period 26/02/2020 to 15/06/2020 which is considered to be the first "phase" of the pandemic.
View Article and Find Full Text PDFGlobal warming affects the aquatic ecosystems, accelerating pathogenic microorganisms' and toxic microalgae's growth and spread in marine habitats, and in bivalve molluscs. New parasite invasions are directly linked to oceanic warming. Consumption of pathogen-infected molluscs impacts human health at different rates, depending, inter alia, on the bacteria taxa.
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