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  <title>DSpace Communidade:</title>
  <link rel="alternate" href="https://ri.ufs.br/jspui/handle/riufs/1076" />
  <subtitle />
  <id>https://ri.ufs.br/jspui/handle/riufs/1076</id>
  <updated>2026-04-25T23:00:41Z</updated>
  <dc:date>2026-04-25T23:00:41Z</dc:date>
  <entry>
    <title>Chuvas intensas para o estado de Sergipe com base em dados desagregados de chuva diária</title>
    <link rel="alternate" href="https://ri.ufs.br/jspui/handle/riufs/23663" />
    <author>
      <name>Aragão, Ricardo de</name>
    </author>
    <author>
      <name>Santana, Geizon R. de</name>
    </author>
    <author>
      <name>Costa, Clarissa Eiras Fialho Flores da</name>
    </author>
    <author>
      <name>Cruz, Marcus Aurélio Soares</name>
    </author>
    <author>
      <name>Figueiredo, Eduardo Eneas de</name>
    </author>
    <author>
      <name>Srinivasan, Vajapeyam Srirangachar</name>
    </author>
    <id>https://ri.ufs.br/jspui/handle/riufs/23663</id>
    <updated>2026-01-20T15:07:03Z</updated>
    <published>2013-03-01T00:00:00Z</published>
    <summary type="text">Título: Chuvas intensas para o estado de Sergipe com base em dados desagregados de chuva diária
Autor(es): Aragão, Ricardo de; Santana, Geizon R. de; Costa, Clarissa Eiras Fialho Flores da; Cruz, Marcus Aurélio Soares; Figueiredo, Eduardo Eneas de; Srinivasan, Vajapeyam Srirangachar
Abstract: Floods have frequently been observed worldwide, particularly in urban and rural areas of Brazil as a consequence of antropic impacts and climate change. To cope with the problem hydraulic structures are designed based on the observed maximum flood, or statistically predicted through the rainfall-duration relationship established with recorded data, which are generally scarce. Due to the lack of such data, disaggregation of daily rainfall is generally utilized. In the State of Sergipe-Brazil, the rainfall-duration relationships were established utilizing disaggregated daily rainfalls, observed in 48 stations, and the probability distributions of Weibull and Gumbel. The best results were obtained with the Weibull distribution. The spatial distributions of the parameters of the rainfall-duration relationships demonstrated the high rainfall variability in the region.</summary>
    <dc:date>2013-03-01T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Análise de sensibilidade dos parâmetros do modelo SWAT e simulação dos processos hidrossedimentológicos em uma bacia no agreste nordestino</title>
    <link rel="alternate" href="https://ri.ufs.br/jspui/handle/riufs/23649" />
    <author>
      <name>Aragão, Ricardo de</name>
    </author>
    <author>
      <name>Cruz, Marcus Aurélio Soares</name>
    </author>
    <author>
      <name>Amorim, Julio Roberto Araujo de</name>
    </author>
    <author>
      <name>Mendonça, Luciana Coêlho</name>
    </author>
    <author>
      <name>Figueiredo, Eduardo Eneas de</name>
    </author>
    <author>
      <name>Srinivasan, Vajapeyam Srirangachar</name>
    </author>
    <id>https://ri.ufs.br/jspui/handle/riufs/23649</id>
    <updated>2026-01-20T14:21:55Z</updated>
    <published>2013-08-01T00:00:00Z</published>
    <summary type="text">Título: Análise de sensibilidade dos parâmetros do modelo SWAT e simulação dos processos hidrossedimentológicos em uma bacia no agreste nordestino
Autor(es): Aragão, Ricardo de; Cruz, Marcus Aurélio Soares; Amorim, Julio Roberto Araujo de; Mendonça, Luciana Coêlho; Figueiredo, Eduardo Eneas de; Srinivasan, Vajapeyam Srirangachar
Abstract: Erosion has been recognized as the main cause of soil degradation and is accelerated by&#xD;
human intervention in watersheds, causing losses to the agricultural sector and damaging the&#xD;
environment. To estimate the impacts caused by land use or climate changes on&#xD;
hydrosedimentological processes, physically-based distributed models have been shown to be&#xD;
quite effective. In this study, the SWAT model was calibrated and validated for two&#xD;
subwatersheds of the Japaratuba Mirim river watershed, one located upstream of the Fazenda&#xD;
Pão de Açúcar - PA (137.3 km2&#xD;
), and another located upstream of Fazenda Cajueiro - CJ&#xD;
(277.8 km2&#xD;
) in the state of Sergipe, to simulate runoff and soil erosion. To test the sensitivity of&#xD;
the calibrated parameters, the runoff was also simulated by a cross application of the 12 most&#xD;
sensitive parameters in the two watersheds, from 1985 to 2000. The results showed that the&#xD;
model was able to simulate the runoff and forecast, in a consistent way, the sediment yield.&#xD;
However, while the cross application of the parameters from the bigger (CJ) to the smaller&#xD;
watershed (PA) resulted in satisfactory Nash-Sutcliffe efficiency (NSE) and percent bias&#xD;
(PBIAS), the opposite was not true.</summary>
    <dc:date>2013-08-01T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Attached biomass growth and substrate utilization rate in a moving bed biofilm reactor</title>
    <link rel="alternate" href="https://ri.ufs.br/jspui/handle/riufs/20885" />
    <author>
      <name>Marques, José Jailton</name>
    </author>
    <author>
      <name>Souza, Roberto Rodrigues de</name>
    </author>
    <author>
      <name>Souza, Carina Siqueira de</name>
    </author>
    <author>
      <name>Rocha, Inaura Carolina Carneiro da</name>
    </author>
    <id>https://ri.ufs.br/jspui/handle/riufs/20885</id>
    <updated>2025-01-28T11:09:30Z</updated>
    <published>2008-12-01T00:00:00Z</published>
    <summary type="text">Título: Attached biomass growth and substrate utilization rate in a moving bed biofilm reactor
Autor(es): Marques, José Jailton; Souza, Roberto Rodrigues de; Souza, Carina Siqueira de; Rocha, Inaura Carolina Carneiro da</summary>
    <dc:date>2008-12-01T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Otimização de um reator continuo para a produção de biodiesel</title>
    <link rel="alternate" href="https://ri.ufs.br/jspui/handle/riufs/1085" />
    <author>
      <name>Ramos, André Luís Dantas</name>
    </author>
    <author>
      <name>Silva, G. F.</name>
    </author>
    <author>
      <name>Sant’Anna, Mikele Cândida Souza de</name>
    </author>
    <author>
      <name>Miyazaki, Marcelo Noboro Ralim</name>
    </author>
    <author>
      <name>Silva, Gabrielly Pereira</name>
    </author>
    <id>https://ri.ufs.br/jspui/handle/riufs/1085</id>
    <updated>2025-02-04T19:34:58Z</updated>
    <published>2011-01-01T00:00:00Z</published>
    <summary type="text">Título: Otimização de um reator continuo para a produção de biodiesel
Autor(es): Ramos, André Luís Dantas; Silva, G. F.; Sant’Anna, Mikele Cândida Souza de; Miyazaki, Marcelo Noboro Ralim; Silva, Gabrielly Pereira
Abstract: O biodiesel é definido como uma mistura de monoesteres metílicos ou etílicos obtidos a partir de óleos vegetais ou gorduras animais. A produção deste combustível pode ser realizada através da transesterificação por catálise homogênea. A produção em escala industrial é realizada em reatores CSTR (continuous stirred-tank reactor) ou em reatores PFR (plug flow reactor). O reator PFR apresenta vantagens em relação ao reator CSTR, devido ao fato desse primeiro apresentar um tamanho muito menor que o segundo para uma mesma conversão dos reagentes. A fluidodinâmica em reatores interfere diretamente na conversão da reação, esta análise torna-se complexa, devido ao tipo de material (geralmente estruturas metálicas) dos reatores que não permitem visualizar as zonas mortas e linhas de corrente. Neste trabalho, foi realizado a modelagem e simulação para otimização de um reator tubular para produção de biodiesel utilizando o software ANSYS CFX. Foram simuladas 27 geometrias de reatores. Os resultados obtidos foram satisfatórios e duas geometrias apresentaram maior destaque nos valores do gradiente de velocidade.</summary>
    <dc:date>2011-01-01T00:00:00Z</dc:date>
  </entry>
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