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RISS 인기검색어
- 검색키워드
- 저자 : Henrique Fernandes de Lima (검색결과 4 건)
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RIGIDITY THEOREMS IN THE HYPERBOLIC SPACE
De Lima, Henrique Fernandes Korean Mathematical Society 2013 대한수학회보 Vol.50 No.1
As a suitable application of the well known generalized maximum principle of Omori-Yau, we obtain rigidity results concerning to a complete hypersurface immersed with bounded mean curvature in the $(n+1)$-dimensional hyperbolic space $\mathbb{H}^{n+1}$. In our approach, we explore the existence of a natural duality between $\mathbb{H}^{n+1}$ and the half $\mathcal{H}^{n+1}$ of the de Sitter space $\mathbb{S}_1^{n+1}$, which models the so-called steady state space.
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de Oliveira Moura, Emmanuella,do Nascimento Rangel, Adriano Henrique,de Melo, Maria Celeste Nunes,Borba, Luiz Henrique Fernandes,de Lima, Dorgival Morais Junior,Novaes, Luciano Patto,Urbano, Stela Ant Asian Australasian Association of Animal Productio 2017 Animal Bioscience Vol.30 No.9
Objective: This study aimed to evaluate the microbiological and cellular milk profile for the diagnosis of subclinical mastitis in female buffaloes and to assess risk factors for predisposition of the disease. Methods: Analyses were carried out by standard plate count (SPC), identification of species and antibiotic resistance, somatic cell count (SCC), electrical electrical conductivity of milk (ECM), and lactoferrin content in milk. Teat cups were swabbed to evaluate risk factors, observing hyperkeratosis, milking vacuum pressure and cleanliness of the site. Hence, 30 female buffaloes were randomly selected (15 from a group in early lactation and 15 in late lactation). Results: The most common bacteria in the microbiological examination were Staphylococcus spp., Streptococcus spp. and Corynebacterium sp. In the antibiotic sensitivity test, 10 (58.82%) of the 17 antibiotics tested were sensitive to all isolates, and resistant bacteria were Streptococcus uberis, Streptococcus dysgalactiae, Streptococcus haemolyticus, and Escherichia coli. It was observed that positive samples in the microbiological examination showed total bacterial count between $9.10{\times}10^3$ to $6.94{\times}10^6$ colony forming units/mL, SCC between 42,000 to 4,320,000 cells/mL and ECM ranging from 1.85 to 7.40 mS/cm. It was also found that the teat cups had high microbial counts indicating poor hygiene, and even faults in the cleanliness of the animals' waiting room were observed. It is concluded that values of SCC above 537,000 cells/mL and ECM above 3.0 mS/mL are indications of mammary gland infection for this herd; however, the association of these values with a microbiological analysis is necessary to more accurately evaluate the health status of mammary glands with subclinical mastitis. Conclusion: Through phenotypic characterization of bacteria involved in the samples, the genera Staphylococcus spp., Streptococcus spp., and Corynebacterimum bovis were the most prevalent in this study. Faults in environment and equipment hygienization are factors that are directly associated with mastitis.
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Rigidity theorems in the hyperbolic space
Henrique Fernandes de Lima 대한수학회 2013 대한수학회보 Vol.50 No.1
As a suitable application of the well known generalized max- imum principle of Omori-Yau, we obtain rigidity results concerning to a complete hypersurface immersed with bounded mean curvature in the (n+ 1)-dimensional hyperbolic space Hn+1. In our approach, we explore the existence of a natural duality between Hn+1 and the half Hn+1 of the de Sitter space Sn+1 1 , which models the so-called steady state space.
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A note on maximal hypersurfaces in a generalized Robertson-Walker spacetime
Henrique Fernandes de Lima 대한수학회 2022 대한수학회논문집 Vol.37 No.3
In this note, we apply a maximum principle related to vo\-lu\-me growth of a complete noncompact Riemannian manifold, which was recently obtained by Al\'{\i}as, Caminha and do Nascimento in~\cite{Alias-Caminha-Nascimento}, to es\-ta\-blish new uniqueness and nonexistence results concerning maximal spacelike hypersurfaces immersed in a generalized Robertson-Walker (GRW) spacetime obeying the timelike convergence condition. A study of entire solutions for the maximal hypersurface equation in GRW spacetimes is also made and, in particular, a new Calabi-Bernstein type result is presented.
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