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41 results for “W. Carvalho”
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Review ArticleOpen accessIn the author namesMaintenance and Evolution Processes of Embedded Software: A Systematic Literature ReviewAloysio Augusto Rabello de Carvalho, Luiz Eduardo Galvão MartinsThe relevance of embedded systems has increased considerably due to industrial automation and the adoption of IoT and medical devices. This process demands the adaptation of software engineering techniques that involve the maintenance and evolution of software for use in embedded systems. We conducted this Systematic Literature Review (SLR) to investigate the state of the art on the topics of … …Journal of Computer Science, Vol. 21, Issue 7 · 17 Jul 2025 · 3,750 accessesView PDFCite
Research ArticleOpen accessIn the author namesHeavy Metals Content and Ecotoxicity of Sediments from the Congo RiverDidier Makonko Mabidi, Honoré Manyingu Mutwejile, Georgette Ngakiama Beni Ngweme et al.This research aimed to quantify the contamination of Congo River sediments by heavy metals and to evaluate their ecotoxicological effects in the municipalities of Maluku, Gombe, and Kinsuka, Kinshasa Province. Metal concentrations in sediments reached 340 mg kg-1 for Cr, 310 mg kg-1 for Cu, 826 mg kg-1 for Zn, 63 mg kg-1 for as, 1.9 mg kg-1 for Cd, … …American Journal of Environmental Sciences, Vol. 20, Issue 1 · 9 Nov 2024 · 6,052 accessesView PDFCite
Research ArticleOpen accessIn the author namesBacterial Resistance in Primary Bloodstream Infections in the COVID-19 Pandemic: What has Changed at a Reference Hospital in Northeastern Brazil?Jonathan Da Silva Xavier, Jorge Luiz Nobre Rodrigues, Caroline Mary Gurgel Dias Florêncio et al.The increased use of central venous catheters due to the severity of COVID-19 cases and the difficulty in implementing preventive Healthcare-Associated Infection measures contributed to worsening an already challenging scenario of bacterial resistance. Characterizing the impact of these significant health crises on the bacterial resistance profile is necessary to strengthen antimicrobial control protocols in an effort to decrease morbidity. Our … …American Journal of Infectious Diseases, Vol. 20, Issue 2 · 4 Sep 2024 · 5,036 accessesView PDFCite
Review ArticleOpen accessIn the author namesCOVID 19-How is the Exposure of the Pediatric Population? A Systematic Review ProtocolVitória Monteiro Monte Oliveira, Paulo Francisco de Almeida-Neto, Francisca Dalila Paiva Damasceno de Lima et al.Solid information on exposure and how to treat COVID-19 in pediatric patients is not yet conclusive in the literature, because of this it is necessary to make a critical analysis of the available data in order to provide common points on the theme in question. This systematic review protocol is registered in PROSPERO (ID: CRD42020181835) and aims through searches in … …American Journal of Infectious Diseases, Vol. 17, Issue 2 · 12 Apr 2021 · 6,869 accessesView PDFCite
Research ArticleOpen accessIn the author namesFiber Laser Beam Welding Between Niobium and TitaniumRafael Humberto de Mota Siqueira, Isabela Atilio, Caroline Cristine de Andrade Ferreira et al.Niobium and titanium are difficult to weld because of many factors, such as their tendency to oxidize and burn and the relatively high melting temperatures. Here, fiber laser beam welding has been proposed to weld Nb and Ti sheets in overlap geometry. In the current research, one millimeter thick CP-Ti was placed at the top and a 3 mm pure … …Journal of Aircraft and Spacecraft Technology, Vol. 4, Issue 1 · 9 Mar 2020 · 7,721 accessesView PDFCite
Research ArticleOpen accessIn the author namesHardening Effects of In-Situ Aging for a Laser Welded Maraging SteelMilton Sergio Fernandes de Lima, Rafael Humberto de Mota Siqueira, Sheila Medeiros de Carvalho, Antonio Jorge AbdallaMaraging steels are ultra-high strength alloys which have been successfully laser welded to obtain structural components. For most of the applications these steels are in an aged state to attain tensile strength up to 1.5 GPa, although welding induces local softening due to dissolution of precipitates. This paper aims to investigate the effect of in-situ aging of the maraging steel … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 12 Nov 2019 · 7,214 accessesView PDFCite
Review ArticleOpen accessIn the author namesExplaining the Generalized Cross-Validation on Linear ModelsLucas Monteiro Chaves, Laerte Dias de Carvalho, Carlos José dos Reis, Devanil Jaques de SouzaCross-Validation is a model validation method widely used by the scientific community. The Generalized Cross-Validation (GCV) is an invariant version of the usual Cross-Validation method. This generalization was obtained using the non usual theory of circulant complex matrices. In this work we intend to give a clear and complete exposition concerning the linear algebra assumptions required by the theory. The … …Journal of Mathematics and Statistics, Vol. 15, Issue 1 · 25 Oct 2019 · 10,455 accessesView PDFCite
Research ArticleOpen accessIn the author namesAn ADD-Oriented Software Architecture for Structuring Information to Open Government DataAndreiwid Sheffer Correa, P. L.P. Correa, F. S.C. Silva, T. CarvalhoThe huge number of heterogeneous and not standardized websites where public records are disclosed is an evidence of how unprepa¬red governments are about Open Government Data movement. This scenario is seen all over the world, especially in organizations which open data prin¬ciples are new e.g. local governments. Thus, not effective law enforcement and the lack of openness result in a … …Journal of Computer Science, Vol. 14, Issue 5 · 10 Mar 2018 · 7,638 accessesView PDFCite
Research ArticleOpen accessIn the author namesInfluence in the Drink Preparation Mode Associated Coffee the Antioxidant Capacity of Different BrandsÁzula Narayama Malacco Ferreira, Mariana Mirelle Pereira Natividade, Roberto Gonçalves Junqueira et al.Coffee is one of the most consumed beverages worldwide and commonly present on Brazilian tables. It is known for its health benefits, mainly ascribed to its antioxidant compounds. Because of a lack of standardized analytical methods to evaluate these compounds in coffee, the variety of products sold, as well as the influence of the form of preparation of the beverage … …American Journal of Applied Sciences, Vol. 15, Issue 1 · 25 Jan 2018 · 8,165 accessesView PDFCite
Research ArticleOpen accessIn the author namesPrenatal Ethanol Exposure Affects the Proliferation and Differentiation of the Osteoblasts from Newborn RatsIsabel Chaves Silva Carvalho, Dennia Perez de Andrade, Noala Vicensoto Moreira Milhan et al.Alcohol exerts teratogenic effects and its consumption during pregnancy may cause various alterations in the fetus, including deficit of bone development. The objective of this study was to evaluate the initial responses, on osteoblasts isolated from newborn rat calvaria, after prenatal ethanol exposure. Nine pregnant rats were divided into three groups according to the diet fed during pregnancy: Rats fed … …OnLine Journal of Biological Sciences, Vol. 15, Issue 3 · 14 Jul 2015 · 6,706 accessesView PDFCite