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Avaliação de aspectos da fragilidade ambiental para o ecoturismo no entorno da represa do 29‐São Carlos‐SP
(Universidade Federal de São Carlos, 2007-11-20) Silva, Mauricio Sanches Duarte; Gonçalves, Adail Ricardo Leister; https://lattes.cnpq.br/3216914214741188; https://lattes.cnpq.br/5714231393822905
The main objective of this research is to describe a methodology for the analysis of environmental impacts due to ecotourism activities, which can be easily employed by tourism managers and planners. The methodology uses multi-criteria evaluation, based in fuzzy logic, together with a Geographic Information System (SPRING) to treat information related to the variables that characterize an area and can influence its adequacy for ecotourism. The selections of the variables to be incorporated in the model for impacts assessment was based on the bibliography and are the ones most used in environmental impact studies including: topographic characteristics (declivity), pedologic characteristics (type of soil) and vegetation and land use characteristics. Other variables may be included in the analysis if the study area has some specific characteristics that deserve emphasis. In the case study, developed in the 29 Dam Region, in the city of São Carlos, SP, the methodology proved rather adequate for attaining the research objectives, allowing the spatial visualization of the results, expressed by classes of adequacy.
Sistemas elípticos com pesos envolvendo o expoente crítico de Hardy-Sobolev
(Universidade Federal de São Carlos, 2007-11-20) Rodrigues, Rodrigo da Silva; Miyagaki, Olímpio Hiroshi; https://lattes.cnpq.br/2646698407526867; https://lattes.cnpq.br/9606661651573155
In this work, we will study the existence and nonexistence of positive weak solutions for two classes of elliptic systems with weights. The first class will involve nonlinearities of the type positone and semipositone. We will prove a strong maximum principle, and we will obtain some properties of the first eigenfunction of the eigenvalue problem associated to our operator, and also we will prove the sub and supersolution method. The second class will involve a nonlinear perturbation. We will use the variational methods to study the subcritical and critical situations, and under certain hypotheses, we will show the existence of a second weak solution.