Mestrado em Engenharia Ambiental

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http://repositorio.ufes.br/handle/10/17612

Nível: Mestrado Acadêmico
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Navegando Mestrado em Engenharia Ambiental por Autor "1º membro da banca"

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    Caracterização gravimétrica e comercial dos resíduos sólidos urbanos recolhidos em Postos de Entrega Voluntaria do sistema de Coleta Seletiva da Prefeitura Municipal de Vitória-ES
    (Universidade Federal do Espírito Santo, 2001-12-13) Laignier, Irene Thomé Rabello; Braga, Florindo dos Santos; 1º membro da banca
    This work aimed to characterize the dry and solid urban waste comercialized by Usina de Lixo de Vitória – ES composed of Voluntary Delivery Offices (Postos de Entrega Voluntária - PEV), implemented by the city of Vitória, capital of Espírito Santo. Fieldwork was developed along with the practical techniques of collect, transportation and a process of selection for later recovery used by the existent system, under tecno-scientific criteria. From the analysis of the results it is concluded that the waste from the PEVs of selective collect had in its composition 38% paper, 19% glass, 13%, plastic and 8% ferrousand non-ferrous metals and 22% discards and the utilization index of the recycle materials taken in the PEVs was about 77%. The acts of vandalism against PEVs are not very significative. Laterly was stimated the number of users that utilize the system of selective collect to dispose the recycle materials that they own produce. Finally was established a relationship between the locations of these collectors and their own filling in level. Because it is the first avaliation of this kind of collect, in the state of ES, hopefully that the results taken, come to contribute for a management and planning in case of expansion of the selective collect in Vitória or even in the implementation of this kind of collect in the other cities.
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    Influência do módulo de compressibilidade na propagação da onda acústica em meios estratificados
    (Universidade Federal do Espírito Santo, 2023-09-29) Araujo, Luana Maria Kiefer de; Co-orientador1; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador2; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador3; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador4; ID do co-orientador4; Lattes do co-orientador4; Orientador1; https://orcid.org/; http://lattes.cnpq.br/; Orientador2; https://orcid.org/; http://lattes.cnpq.br/; https://orcid.org/; http://lattes.cnpq.br/; 1º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 2º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 3º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 4º membro da banca; http://lattes.cnpq.br/; 5º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 6º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 7º membro da banca; https://orcid.org/; http://lattes.cnpq.br/
    This dissertation focuses on investigating the influence of compressibility modulus on acoustic propagation in stratified media. Fluid mechanics approaches are employed to derive the equation governing the propagation of acoustic waves in a non-homogeneous medium. A second-order partial differential equation (PDE), considering both space and time, is formulated to describe the propagation of the pressure wave, also known as the P-wave, and incorporates a Mexican hat-shaped source term that models the disturbance generated in the medium. To numerically solve the P-wave PDE, the finite difference method in the time domain is implemented, using a second-order explicit scheme in both time and space. To ensure numerical stability, a stability condition is developed that adjusts the time step according to the spatial discretization of the numerical mesh. Within the numerical solution context, a second-order Absorbing Boundary Condition (ABC) is applied. The numerical model is implemented in FORTRAN and integrated with the OCTAVE and PYTHON environments to facilitate result visualization. Densities and wave velocities for a section along the coast of Espírito Santo are calculated based on temperature and salinity data obtained from the Hybrid Coordinate Ocean Model (HYCOM). Subsequently, the compressibility modulus is computed, and simulations of P-wave propagation in real oceanic scenarios are conducted to gain a deeper understanding of its role in the propagation of acoustic waves in non-homogeneous media. The simulations underscore the critical importance of wave velocity due to its direct influence on wave travel times, especially relevant in applications such as underwater seismology, where the precise location of seismic sources depends on these times. In the research context, the compressibility modulus is acknowledged as significant, though its fluctuation in seawater is considerably smaller compared to variations in sound velocity. This discrepancy assigns a prominent role to sound velocity in the analysis and interpretation of seismic and acoustic data