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Showing 1 to 12 of 449 entries
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Mixed thermal convection: fundamental issues and analysis of the planar case.

Anais da Academia Brasileira de Ciencias

Padet J, Cotta RM, Mladin EC, Padet C.
PMID: 26312419
An Acad Bras Cienc. 2015 Sep;87(3):1865-85. doi: 10.1590/0001-3765201520140254. Epub 2015 Aug 25.

This paper aims to renew interest on mixed thermal convection research and to emphasize three issues that arise from the present analysis: (i) a clear definition of the reference temperature in the Boussinesq approximation; (ii) a practical delimitation of...

A study of the dry forest communities in the Dominican Republic.

Anais da Academia Brasileira de Ciencias

García-Fuentes A, Torres-Cordero JA, Ruiz-Valenzuela L, Lendínez-Barriga ML, Quesada-Rincón J, Valle-Tendero F, Veloz A, León YM, Salazar-Mendías C.
PMID: 25806987
An Acad Bras Cienc. 2015 Mar;87(1):249-74. doi: 10.1590/0001-3765201520130510.

This paper is a floristic and phytosociological study of the dry forest communities of the Dominican Republic. A total of 69 relevés in dry forest biotopes were carried out. The samples were subsequently subjected to Detrended Correspondence Analysis for...

Trade-off between reservoir yield and evaporation losses as a function of lake morphology in semi-arid Brazil.

Anais da Academia Brasileira de Ciencias

Campos JN, Lima IE, Studart TM, Nascimento LS.
PMID: 27254450
An Acad Bras Cienc. 2016 May 31;88(2):1113-25. doi: 10.1590/0001-3765201620150124.

This study investigates the relationships between yield and evaporation as a function of lake morphology in semi-arid Brazil. First, a new methodology was proposed to classify the morphology of 40 reservoirs in the Ceará State, with storage capacities ranging...

On non-Kupka points of codimension one foliations on ℙ3.

Anais da Academia Brasileira de Ciencias

Calvo-Andrade O, Côrrea M, Fernández-Pérez A.
PMID: 27991951
An Acad Bras Cienc. 2016 Oct-Dec;88(4):2067-2080. doi: 10.1590/0001-3765201620160013.

We study the singular set of a codimension one holomorphic foliation on ℙ 3 . We find a local normal form for these foliations near a codimension two component of the singular set that is not of Kupka type....

Enhancement of Hevea brasiliensis properties through chemical application.

Anais da Academia Brasileira de Ciencias

Kadir R, Jantan MD.
PMID: 27991952
An Acad Bras Cienc. 2016 Oct-Dec;88(4):2081-2092. doi: 10.1590/0001-3765201620150650.

The effects of four different types of bleaching agents (hydrogen peroxide, sodium hypochlorite, sodium chlorite and oxalic acid) mixed together with 2% boron-based preservative (Celbor SP) were studied on green sawn rubberwood. Two concentration levels (1% and 2%) of...

Paralavas in the Cretaceous Paraná volcanic province, Brazil - A genetic interpretation of the volcanic rocks containing phenocrysts and glass.

Anais da Academia Brasileira de Ciencias

Baggio SB, Hartmann LA, Bello RM.
PMID: 27991957
An Acad Bras Cienc. 2016 Oct-Dec;88(4):2167-2193. doi: 10.1590/0001-3765201620150088.

The occurrences of glassy rocks containing long and curved phenocrysts in the Paraná volcanic province, South America, are here interpreted as paralavas. The large number of thin (0.1-0.5 m) dikes and sills of glassy volcanic rocks with hopper, hollow...

Periodic solutions of Lienard differential equations via averaging theory of order two.

Anais da Academia Brasileira de Ciencias

Llibre J, Novaes DD, Teixeira MA.
PMID: 26648545
An Acad Bras Cienc. 2015 Oct-Dec;87(4):1905-13. doi: 10.1590/0001-3765201520140129. Epub 2015 Dec 04.

For ε ≠ 0 sufficiently small we provide sufficient conditions for the existence of periodic solutions for the Lienard differential equations of the form x'' + f ⁢(x)⁢ x' + n2⁢x + g (x) = ε2p1 ⁢(t) + ε3...

Performance assessment of the database downscaled ocean waves (DOW) on Santa Catarina coast, South Brazil.

Anais da Academia Brasileira de Ciencias

Silva PG, Klein AH, González M, Gutierrez O, Espejo A.
PMID: 25993356
An Acad Bras Cienc. 2015 Apr-Jun;87(2):623-34. doi: 10.1590/0001-3765201520140329. Epub 2015 May 08.

This work presents a validation of wave parameters from the new sixty years Downscaled Ocean Waves (DOW) reanalysis database. This study compares quantiles of the Gumbel distribution of Hs (significant wave height) and Tp (peak period) from simulated data...

Recharge contribution to the Guarani Aquifer System estimated from the water balance method in a representative watershed.

Anais da Academia Brasileira de Ciencias

Wendland E, Gomes LH, Troeger U.
PMID: 25993364
An Acad Bras Cienc. 2015 Apr-Jun;87(2):595-609. doi: 10.1590/0001-3765201520140062. Epub 2015 May 15.

The contribution of recharge to regional groundwater flow systems is essential information required to establish sustainable water resources management. The objective of this work was to determine the groundwater outflow in the Ribeirão da Onça Basin using a water...

Assigning dates and identifying areas affected by fires in Portugal based on MODIS data.

Anais da Academia Brasileira de Ciencias

Panisset J, Dacamara CC, Libonati R, Peres LF, Calado TJ, Barros A.
PMID: 28954172
An Acad Bras Cienc. 2017 Jul-Sep;89(3):1487-1501. doi: 10.1590/0001-3765201720160707.

An automated procedure is here presented that allows identifying and dating burned areas in Portugal using values of daily reflectance from near-infrared and middle-infrared bands, as obtained from the MODIS instrument. The algorithm detects persistent changes in monthly composites...

Commemorative Volume of the Centenary of the Brazilian Academy of Sciences.

Anais da Academia Brasileira de Ciencias

Kellner AWA.
PMID: 28562822
An Acad Bras Cienc. 2017 May;89(1):371-372. doi: 10.1590/0001-37652017891s.

No abstract available.

Late quaternary dynamics in the Madeira River basin, southern Amazonia (Brazil), as revealed by paleomorphological analysis.

Anais da Academia Brasileira de Ciencias

Hayakawa EH, Rossetti DF.
PMID: 25806978
An Acad Bras Cienc. 2015 Mar;87(1):29-49. doi: 10.1590/0001-3765201520130506.

Ancient drainage systems are being increasingly documented in the Amazon basin and their characterization is crucial for reconstructing fluvial evolution in this area. Fluvial morphologies, including elongate belts, are well preserved along the Madeira River. Digital Elevation Model from...

Showing 1 to 12 of 449 entries