Centro de Ciências Exatas e de Tecnologia - CCET: Envíos recientes
Mostrando ítems 1321-1340 de 7301
-
Métodos de detecção de fraude em cartões de crédito: um estudo comparativo
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 14/04/2022)The arrival of the pandemic radically changed the consumption habits of goods and services, starting to occur almost exclusively in the virtual world, which in turn, in the context of fraud, has a greater number of loopholes ... -
Estudo das propriedades de buracos negros de Schwarzschild e de Kerr
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 13/04/2022)In this study, firstly General Relativity, defined by Albert Einstein in 1915, is introduced. In the first chapter, the concepts of geodesics and the Christoffel symbols are demonstrated, followed by a brief presentation ... -
Um estudo sobre os impactos de algumas medidas sanitárias na incidência e mortalidade por COVID-19
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 07/04/2022)Since March 2020, Brazil, like the whole world, has been facing a major pandemic caused by COVID-19 (SARS-CoV-2). COVID-19 is a highly transmissible respiratory infection and for this reason governments around the world ... -
Um estudo sobre a provisão de consórcio com séries temporais e machine learning
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 07/04/2022)The consortium sector of a particular company works by dividing its customers into groups that start and finish at the same time the payment of installments of a combined amount to obtain their own vehicle. The acquisition ... -
Estudo e comparação das técnicas de validação cruzada desenvolvidas para séries temporais
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 18/04/2022)Testing the generalization capacity of an algorithm obtained is crucial for any prediction methodology, for which cross-validation methods were developed. However, when dealing with data that have dependency among observations, ... -
Análise direta de fertilizantes minerais empregando fluorescência de raios-X
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 27/04/2022)The present work aimed to theoretically evaluate the use of x-ray fluorescence in the direct analysis of mineral fertilizers, ensuring effectiveness and quality for the research and development sector, in the laboratory ... -
Avaliação da atividade biológica do material orgânico derivado da base de Schiff N,N-bis'(salicilideno)-1,2-fenilenodiamina complexado com cobre (ll) e cobalto (ll)
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Biotecnologia - PPGBiotec, Câmpus São Carlos, 08/11/2021)Treatment for bacterial infections is through antimicrobials and resistance is a major worldwide problem that leads to approximately 35,000 deaths per year. Another public health problem is related to occurrences caused ... -
Cooperação, reconhecimento e sentido do trabalho no processo de garantia da qualidade orgânica na agricultura familiar
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Engenharia de Produção - PPGEP, Câmpus São Carlos, 24/03/2022)Ecological agriculture comprises a sector that has grown sharply in recent decades. With the expansion of this market, there is a demand to guarantee the organic quality of the products, whose processes impact the organization ... -
Desenvolvimento e otimização de método cromatográfico para separação de três ativos e suas respectivas impurezas com aplicação de planejamento fatorial
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação de Mestrado Profissional em Química - PPGQ, Câmpus São Carlos, 28/03/2022)An essential part of the development of a new drug is the development of methods to analyze the products during the stage of development and throughout their useful life to ensure quality and safety for patients. The ... -
Classes características de variedades topológicas e generalizadas
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Matemática - PPGM, Câmpus São Carlos, 24/03/2022)In this work, we will initially present generalized bundles, a concept developed by Fadell with the objective of generalizing vector bundles, Stiefel-Whitney classes andWu’s formula from the context of smooth manifolds ... -
Redes neurais aplicadas a grafos: uma abordagem semi-supervisionada
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 18/04/2022)In this work, we propose an in-depth analysis of Graph Convolutional Networks, a semi-supervised machine learning method for node classification in graph-structured data. Based on the seminal work proposed by Thomas Kipf ... -
Avaliação do tratamento dos resíduos sólidos em uma unidade escolar como instrumento para um plano de gestão
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 24/03/2022)Since the humanity stop being errant and started to fix residency, the residue accumulation has been an issue. So much so, that after the industrialization this matter reached an alarming point, and nowadays it takes ... -
CORAL: machine learning e matrizes de rotação aplicados a resolução de sistemas multivariados
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 14/04/2022)CORAL (Curve ResOlution for dAta anaLysis) is a Python-based library of chemometric tools for multivariate spectral decomposition of large datasets, especially those where the techniques involved obey Beer's law or a form ... -
Polynomial Weingarten surfaces of tubular type
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Matemática - PPGM, Câmpus São Carlos, 04/04/2022)This work seeks to contribute to the classification of Weingarten surfaces. More precisely, it fully classifies three families of surfaces (named tubular, cyclic and canal surfaces) in a tridimensional space form (Euclidean, ... -
Árvores hibridas: particionamento recursivo baseado em modelos paramétricos
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 12/04/2022)The present study seeks to explore hybrid trees, so called called recursive partitioning based on parametric models. Such method is based on traditional decision trees (regression and classification tree) and parametric ... -
A Matemática da música: uma abordagem para o ensino de frações através da teoria musical
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Ensino de Ciências Exatas - PPGECE, Câmpus São Carlos, 19/04/2022)This study presents a proposal based on the application of innovative methodologies through didactic sequences for the teaching of Mathematics to Elementary School II students. It aims to introduce concepts about fractions ... -
Materiais ferroelétricos fotovoltaicos
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 20/04/2022)In this work, the characteristics of semiconductor and ferroelectric materials are analyzed. in order to explore the functioning of photovoltaic cells made with one or other material and compare them. The main objective ... -
Estudo teórico e experimental da interação de elétrons com moléculas de interesse astroquímico
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 08/09/2021)We performed a theoretical and experimental investigation on electron (e⁻) scattering by molecules of astrochemical interest. Theoretically, we obtained elastic differential (DCSs), integral (ICSs) and momentum-transfer ... -
Modelagem de arquitetura baseada em microsserviços com foco em segurança
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 14/04/2022)Data are key players in the Fourth Industrial Revolution as they enable the digital world to become increasingly connected and intelligent. Among the various types of data, personal and sensitive data demand greater caution ... -
Sistema PET/MR híbrido: aplicação para imageamento in vivo em ambiente de máxima biocontenção
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 18/04/2022)The imaging of living organisms, in its different techniques and applications, corresponds to the least invasive and most pragmatic way to analyze the development of infectious processes, in addition to its many other ...