2020
Autores
Zafrir, H; Barbosa, S; Levintal, E; Weisbrod, N; Ben Horin, Y; Zalevsky, Z;
Publicação
FRONTIERS IN EARTH SCIENCE
Abstract
Long-term monitoring of Rn-222 and CO2 at a depth of several dozen meter at the SdeEliezer site, located within one of the Dead Sea Fault Zone segments in northern Israel, has led to the discovery of the clear phenomenon that both gases are affected by underground tectonic activity along the Dead Sea Fault Zone. It may relate to pre-seismic processes associated with the accumulation and relaxation of lithospheric stress and strain producing earthquakes. This approach assumes that meteorological influences on physico-chemical parameters are limited at depth since its strength diminishes with the increase of the overlay layer thickness. Hence, the monitoring of natural gases in deep boreholes above the water table enables to reduce the climatic-induced periodic contributions, and thus to identify the specific portion of the radon signals that could be related to regional tectonic pre-seismic activity. The plausible pre-seismic local movement of the two gases at depth is identified by the appearance of discrete, random, non-cyclical signals, wider in time duration than 20 h and clearly wider than the sum of the width of the periodic diurnal and semidiurnal signals driven by ambient meteorological parameters. These non-cyclical signals may precede, by one day or more, a forthcoming seismic event. Hence, it is plausible to conclude that monitoring of any other natural gas that is present at depth may show a similar broadening signal and may serve as a precursor too. The necessary technical conditions enabling to distinguish between anomalous signals of gases that may be induced locally by pre-seismic processes at depth, and the relatively low periodic signals that are still established at depth related to external climatic conditions, are presented in detail.
2020
Autores
Chen, X; Barbosa, S; Mäkelä, A; Paatero, J; Monteiro, C; Guimarães, D; Junninen, H; Petäjä, T; Kulmala, M;
Publicação
Abstract
2020
Autores
Rousseau, D; Barbosa, S; Bagniewski, W; Boers, N; Cook, E; Fohlmeister, J; Goswami, B; Marwan, N; Rasmussen, SO; Sime, L; Svensson, A;
Publicação
Abstract
2020
Autores
Barbosa, S; Camilo, M; Almeida, C; Almeida, J; Amaral, G; Aplin, K; Dias, N; Ferreira, A; Harrison, G; Heilmann, A; Lima, L; Martins, A; Silva, I; Viegas, D; Silva, E;
Publicação
Abstract
2020
Autores
Jorge, F; Paulino, M; Teixeira, MS; Losada, N; Gonçalves, R; Martins, J;
Publicação
RISTI - Revista Iberica de Sistemas e Tecnologias de Informacao
Abstract
Tourism products online shopping is increasing with e-commerce development that stimulated the creation of several platforms in the recent years. The purpose of this study was to evaluate the influence of some determinants of tourism products online shopping, as the risk associated with this behavior, and travel agencies versus digital marketing tools perceived usefulness. This research used a survey method applied to 343 Spanish consumers from Salamanca region with personal interviews. To analyze the data, it was used structural equation modelling. Because tourism products online shopping risk influence negatively consumers’ attitude toward it, this need to be worked by tourism practitioners and, for segments averse to that risk, travel agencies distribution channel have higher perceived usefulness and can be a better option. On other hand, this research evidenced the importance of digital marketing tools as website, mobile devices and online booking because their perceived usefulness affect the attitude and behavior toward online shopping of tourism products.
2020
Autores
Moreira, E; Correia, FF; Bispo, J;
Publicação
Programming'20: 4th International Conference on the Art, Science, and Engineering of Programming, Porto, Portugal, March 23-26, 2020
Abstract
Mobile device users have been growing in the last years but the limited battery life of these devices is considered one of the major issues amongst users and programmers. Therefore, there is a need to guide developers in developing mobile applications in the most energy efficient way. One of the ways to improve this is to provide live feedback about the energy efficiency of a program while it's being programmed. We have analyzed and compared a total of 16 different tools and presented a list of 15 code smells and respective refactorings. From the analyzed tools, Leafactor is the closest to a valid solution to our problem because it's the only energy-aware tool with the highest liveness level. However, in order to be executed the programmer needs to trigger it on the IDE by selecting the file, instead of automatically being executed without the programmer being noticed and refactor his inefficient code. © 2020 Owner/Author.
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