Navegando por Data de Publicação, começando com "2016-07-27"

Filtrar resultados por ano ou mês

Agora exibindo 1 - 3 de 3

Existência e semicontinuidade de atratores global, pullback e de trajetórias
(Universidade Federal de São Carlos, 2016-07-27) Belluzi, Maykel Boldrin; Schiabel, Karina; https://lattes.cnpq.br/2677541143976758; https://lattes.cnpq.br/4072119689022816
The mainly purpose of this paper is to study the asymptotic behaviour of abstract evolution equations. The first part of this work is dedicated to the attraction theory for univoque autonomous and nonautonomous problems and for multivoque autonomous problems. After that, we analyse the existence of the appropriate type of attractor for a reaction-diffusion equation (autonomous and with uniqueness property), a variation of the previous equation (which makes it no longer possible to ensure the uniqueness property) and a delayed differential equation (non-autonomous). For the two lasting equations, we also investigate the upper-semicontinuity of the families of the corresponding attractors.
Estudo do perfil químico de Cyperus rotundus e avaliação do seu potencial de absorção de metais
(Universidade Federal de São Carlos, 2016-07-27) Souza, Poliana Pereira de; Silva, Maria Fátima das Graças Fernandes da; https://lattes.cnpq.br/0457632122660653; https://lattes.cnpq.br/6076960598053817
The following work describes the comparative study of the variation between chemical profiles of plants of the Cyperus rotundus species – where one was collected at Vale S.A.’s dumping ground in Canaã dos Carajás city, Sossego Mine (an area contaminated by heavy metals), and compared with another of the same species collected at an adjacent area (noncontaminated by heavy metals) – through the development of analytical methods such as HPLC-UV, NMR, LC-UVSPE-NMR, LC-MS/MS, as well as through the use of chemometric tools (PCA). Statistical methodologies and chemometric analyses associated with data generated by NMR allowed, through fingerprint profiles, the discrimination between the contaminated and non-contaminated plants and the characterization of some compounds that contributed significantly to such discrimination. ICP-AES analyses were also made, in order to determine metal concentrations in different plant tissues. When analyzing the variation between chemical profiles of plants of the Cyperus rotundus species through fingerprints and data obtained from HPLC-UV-SPE-NMR and LC-MS/MS, it was possible to detect variations regarding mainly phenylpropanoid acids, fatty acids, carbohydrates and aromatic compounds, among others, which were found sometimes in the contaminated plant, sometimes in the non-contaminated plant, sometimes in both, although at different concentrations. It was also observed that in most samples spectra showed much more intense and well-defined peaks for the contaminated, thus highlighting that these compounds can be involved in the defense mechanism of the plant in a situation of oxidative stress caused by metal contamination. The results of the metal determination analyzes by ICP-AES showed much higher concentrations of the Cu element in the vegetative aerial parts of contaminated plants (921 mg/kg) in relation to the non-contaminated (3.7 mg/kg), due to this metal being the main resulting product of the local mining site. It was found that practically all metal concentrations are considerably larger in the contaminated plants when compared with the non-contaminated, therefore suggesting the hyperaccumulating behavior of the Cyperus rotundus species
Uma plataforma para disponibilização centralizada de dados abertos governamentais como suporte para aplicações no contexto de cidades inteligentes.
(Universidade Federal de São Carlos, 2016-07-27) Veira, Daniel Ianegitz; Álvaro, Alexandre; https://lattes.cnpq.br/9929982894313130; https://lattes.cnpq.br/5010369436467934
The Smart City (SC) concept aims to promote dynamic and flexible systems to the cities, that interact with each others and help to maintain the stability and scalability of it’s resources and services, usually through sensors and collectors, with high implantation and maintenance costs. On the other hand, the Open Goverment Data (OGD) are data relationated to the governamental activity, available on the Internet. The publications are fragmented in dierent and uncorrelated portals, also do not follow a standard pattern format. Thus, this work proposes a platform to collect and distribute OGD in a centralized way, in order to provide consolidated information to the context of SC. Also, two validations of this proposal are presented, the first one promoting the solidification of the platform and the second one being an experimental study applied at the academic environment, were eight graduation students where supervisionated, divided into two groups, during the development of two SC projects, consisting of comparative and graphic visualization OGD portals. The experimental group used the platform proposed here as a OGD source, and the control group used OGD collected directly through the governmental transparency portals. At the end of the study, with the intention to find benefits in the utilization of a centralized platform, statistical tests were applied to the collected metrics, and expressive advantages to the experimental group were found, related to the quantity of source-code lines and the development time, indicating that the platform oered benefits during the cycle of development of the project.