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Wyszukujesz frazę "Oliveira, M.S.B." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Calculation of grounding grids parameter at arbitrary geometry
    Autorzy:
    Silva, C. L. B.
    Pires, T. G.
    Calixto, W. P.
    Oliveira, D. N.
    Souza, L. A. P.
    Filho, A. M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/136173.pdf
    Data publikacji:
    2017
    Wydawca:
    EEEIC International Barbara Leonowicz Szabłowska
    Tematy:
    grounding grids parameters
    Heppe
    soil stratified in two layers
    Opis:
    This paper deals with the computation of ground resistance, surface voltage, touch voltage and step voltage, to mesh with horizontal wires arranged in different angles. The computer program implemented used in the mathematical modeling is based on the method proposed by Heppe, which allows obtaining the grounding parameters for homogeneous soil and soil stratified in two layers. The results obtained with the proposed method will be compared with other methods in literature. Also will be presented the results of a grounding grid using wires at various angles.
    Źródło:
    Transactions on Environment and Electrical Engineering; 2017, 2, 2; 11-17
    2450-5730
    Pojawia się w:
    Transactions on Environment and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parasites community of Astronotus crassipinnis (Cichlidae), a fish from the Brazilian Amazon
    Autorzy:
    Santos, G.G.
    Oliveira, M.S.B.
    Neves, L.R.
    Tavares-Dias, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/972319.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    aggregation
    parasites
    Amazon
    Astronotus crassipinnis
    Cichlidae
    Opis:
    We provide the first study on the diversity and community of parasites in Astronotus crassipinnis from the lower Amazon River, in Brazil. Of 35 hosts examined, 100% were infected with one or more species of parasites, such as Gussevia asota, Gussevia astronoti, Gussevia rogersi, Posthodiplostomum sp., Contracaecum sp., Gorytocephalus sp. and Dolops longicauda. Gussevia asota, G. astronoti and G. rogersi were dominant, and, in total, 9788 parasites were collected. The richness of parasite species (4.9±0.7), Brillouin diversity (0.46±0.28) and evenness (0.29±0.17) were low. Parasites had aggregated dispersion, parasitism did not affect the host condition factor, and host size did not influence abundance, species richness and parasite diversity. The parasitic fauna was characterized by the presence of few species of parasites with high prevalence and low abundance, specifically the endoparasites, besides dominance of ectoparasites. The presence of endoparasites indicates that the diet of A. crassipinnis consists mostly of mollusks and microcrustaceans. This fish species is an intermediate host for Posthodiplostomum sp., Contracaecum sp. and Gorytocephalus sp., parasites found in larval stage. Finally, the behavior and availability of infective stages, which are intermediate hosts for endoparasites, were factors structuring the communities of endoparasites.
    Źródło:
    Annals of Parasitology; 2018, 64, 2; 121-128
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charge-Ordering and Magnetoelastic Coupling Effects on the Magnetocaloric Properties of Manganites
    Autorzy:
    Reis, M. S.
    Gomes, A. M.
    Araújo, J. P.
    Tavares, P. B.
    Amaral, J. S.
    Oliveira, I. S.
    Amaral, V. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037124.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Sg
    75.30.Kz
    75.80.+q
    Opis:
    A study of the magnetocaloric properties of La$\text{}_{1-x-y}$Y$\text{}_{y}$Ca$\text{}_{x}$MnO$\text{}_{3}$, La$\text{}_{1-x}$Cd$\text{}_{x}$MnO$\text{}_{3}$, and Pr$\text{}_{1-x}$Ca$\text{}_{x}$MnO$\text{}_{3}$ manganites with ferromagnetic and charge-ordered states is presented. The ferromagnetic lanthanum manganites show a negative entropy change peakΔ S under the application of a magnetic field at the Curie temperature. However, the magnetoelastic coupling effects lead to a first-order paramagnetic-ferromagn etic transition and an increasedΔ S compared to simple ferromagnets. This effect is analyzed in the framework of the Landau theory of phase transitions which shows a comparable influence of the magnetoelastic couplings and the ordinary magnetic ordering effect. The Pr$\text{}_{1-x}$Ca$\text{}_{x}$MnO $\text{}_{3}$ system shows a rich electric and magnetic phase diagram, with a ferromagnetic insulator phase for 0.15
    Źródło:
    Acta Physica Polonica A; 2004, 105, 1-2; 163-171
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of dosimetric peaks of MgB4O7:Dy (40% Tefl on) versus LiF:Mg,Ti TL detectors
    Autorzy:
    Paluch-Ferszt, M.
    Kozłowska, B.
    Oliveira de Souza, S.
    Freire de Souza, L.
    Nascimento Souza, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/148068.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    thermoluminescent detectors
    MgB4O7:Dy
    LiF:Mg,Ti
    Opis:
    Magnesium tetraborate doped with dysprosium (MgB4O7:Dy) is known as a good thermoluminophor for personal dosimetry of gamma ray and X-ray radiation because of its high sensitivity and close tissue equivalence. This material can be produced by different routes. The sintered pastilles of magnesium tetraborate mixed with Tefl on (40%) used in this work were manufactured at the Federal University of Sergipe, Department of Physics by the solid-state synthesis. Magnesium tetraborate was already used for high-dose dosimetry, exhibiting linearity for a wide range of doses. In this work, the authors examined its main characteristics prior to potential use of detectors in everyday dosimetry, comparing this material to a widely used LiF:Mg,Ti phosphor. The following tests infl uencing dosimetric peaks of MgB4O7:Dy were presented: (1) the shape of the glow curves, (2) annealing conditions and post-irradiation annealing and its infl uence for background of the detectors, (3) the choice of the heating rates at the read-out and (4) the threshold dose, that is, the lowest possible dose to be measured. Simil ar tests were performed with LiF:Mg,Ti detectors, produced and widely used in Poland. The results were compared and discussed.
    Źródło:
    Nukleonika; 2016, 61, 1; 49-52
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monogenoidea parasites of Cichla monoculus and Cichla pinima (Osteichthyes: Cichlidae), sympatric fish in lower Tapajós River, Northern Brazil
    Autorzy:
    Oliveira, M.S.B.
    Adriano, E.A.
    Tavares-Dias, M.
    Correa, L.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/6677.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Annals of Parasitology; 2019, 65, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geoelectric method applied in correlation between physical characteristics and electrical properties of the soil
    Autorzy:
    Filho, A. M. S.
    Silva, C. L. B.
    Oliveira, M. A. A.
    Pires, T. G.
    Alves, A. J.
    Calixto, W. P.
    Narciso, M. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/136150.pdf
    Data publikacji:
    2017
    Wydawca:
    EEEIC International Barbara Leonowicz Szabłowska
    Tematy:
    geoelectrical prospecting
    apparent
    electrical resistivity
    soil compaction
    moisture content
    Opis:
    This paper presents the study of the relationship between electrical properties and physical characteristics of the soil. Measures of apparent electrical resistivity of the soil were made for different types of soil, varying moisture content gradually while maintaining a constant compaction, and then varying the compaction and relating it to a constant humidity. Development of a correlation surface is proposed in order to identify granulometry of the soil from moisture and compaction measurements. For the study of spatial variability, two areas were chosen to allow the change of moisture content and compaction in order to verify the measurement capacity of apparent electrical resistivity of the soil as methodology to identify change in soil dynamics. Results obtained show correlations among apparent electrical resistivity of the soil, moisture, soil compaction and clay content.
    Źródło:
    Transactions on Environment and Electrical Engineering; 2017, 2, 2; 37-44
    2450-5730
    Pojawia się w:
    Transactions on Environment and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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