Activity of the Atlantic volcanoes, 1947–1965     

F. Machado 《Bulletin of Volcanology》1967,30(1):29-34

A remarkable sequence of volcanic eruptions were observed in the Atlantic, during the last 20 years: Hckla in 1947, La Palma in 1949, Fogo in 1951, Fayal in 1957, Tristan da Cunha in 1961, Askja in 1961, Surtsey in 1963 (and possibly San Jorge in 1964). The long-period components of the Earth tide seem to influence the eruptive epochs, acting as trigger-forces.  相似文献   

Diurnal evolution of solar radiation at the surface in the city of São Paulo: seasonal variation and modeling     

A. P. de Oliveira  A. J. Machado  J. F. Escobedo  J. Soares 《Theoretical and Applied Climatology》2002,71(3-4):231-249

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Origin and depositional environment of the china clay deposits of south Kerala     

K Soman  Terry Machado 《Journal of Earth System Science》1986,95(2):285-292

Results of petrographic, mineralogic and granulometric studies of the sedimentary china clay deposits of Trivandrum district in south Kerala are discussed in terms of their origin and depositional environment. While mineralogic data indicate a khondalitic source for the kaolins as against the hitherto postulated leptynitic source, petrographic evidences suggest that most of the kaolinite were transported from the weathering crust and deposited. Granulometric data and SEM scanning of sand grains from the clays indicate their deposition in a fluvial/low energy littoral environment under conditions of subaqueous agitation.  相似文献   

Book reviews     

M. E. Machado  A. Duijveman  C. J. Schrijver 《Solar physics》1982,79(2):399-400

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Application of weather radar CAPPI data to verify NWP rainfall accumulation data     

José Marcio Bassan  João Eduardo Machado Perea Martins  Shigetoshi Sugahara  Reinaldo Bomfim da Silveira 《Meteorology and Atmospheric Physics》2015,127(6):725-743

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Probability density functions for non-linear random waves and responses     

Ulla Botelho Machado   《Ocean Engineering》2003,30(8):1027-1050

Non-linear waves have been a research topic for a long time, but have not yet entered common ocean engineering practice. In this article the problem of calculating the probability density function (pdf) for non-linear waves is investigated. The ‘saddle point approximation’ is applied to a second-order wave model to estimate the pdf. The performance of the approximation is compared with the performances of the more commonly used methods for different types of input spectra. In addition, a non-parametric transformation method, with extrapolation of the level crossing intensity, is proposed to estimate the pdf. One simulation and three different data sets are used to investigate the performance of the model.  相似文献   

Photogrammetric and lidar data integration using the centroid of a rectangular roof as a control point     

Edson  Mitishita  Ayman  Habib  Jorge  Centeno  Alvaro  Machado  Jennifer  Lay  Carmen  Wong 《The Photogrammetric Record》2008,23(121):19-35

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Hospital Laundry Wastewater Disinfection with Catalytic Photoozonation     

Lourdes Teresinha Kist  Caroline Albrecht  Ênio Leandro Machado 《洁净——土壤、空气、水》2008,36(9):775-780

Wastewater production in a hospital laundry and the treatment of the most critical wastewater stream, are assessed. Hospital laundry wastewaters are hazardous to the environment due to their high pollutant concentrations and the chemicals added during the clothes washing process. Heterogeneous photocatalysis with UV, O₃ and TiO₂ and their possible combinations were used for disinfection purposes. A ramp‐type reactor was used for TiO₂ (P25 Degussa) fixation and for photochemical diffusion of the ozonized air. After assessing 5‐day biological oxygen demand, chemical oxygen demand, pH, turbidity, and surfactant content, and checking for the presence of thermotolerant coliforms and Escherichia coli, it was concluded that UV/O₃/TiO₂ was the best process/combination, yielding a 100% disinfection rate and a microbiological inactivation of 0.5070 min^–1 for E. coli and of 0.5505 min^–1 for thermotolerant coliforms.  相似文献   

Synthetic scenario generation of monthly streamflows conditioned to the El Niño–Southern Oscillation: application to operation planning of hydrothermal systems     

Treistman  Felipe  Maceira  Maria Elvira Pi&#;eiro  Penna  D&#;bora Dias Jardim  Dam&#;zio  Jorge Machado  Rotunno Filho  Otto Corr&#;a 《Stochastic Environmental Research and Risk Assessment (SERRA)》2020,34(2):331-353

Stochastic Environmental Research and Risk Assessment - The Brazilian Interconnected Power System is hydro dominated and characterized by large reservoirs presenting multi-year regulation...  相似文献   

Newly discovered reefs in the southern Abrolhos Bank,Brazil: Anthropogenic impacts and urgent conservation needs     

E.F. Mazzei  A.A. Bertoncini  H.T. Pinheiro  L.F. Machado  C.C. Vilar  H.C. Guabiroba  T.J.F. Costa  L.S. Bueno  L.N. Santos  R.B. Francini-Filho  M. Hostim-Silva  J.-C. Joyeux 《Marine pollution bulletin》2017,114(1):123-133

The Abrolhos Bank is an area of high ecological, socio-economic importance and harbour the richest and most-extensive coral reefs in the South Atlantic. Here we report the discovery of shallow (12–25 m depth) reef complex with ten large biogenic structures, intermediate between the typical mushroom-shaped pinnacles of the northern Abrolhos Bank (17°–18° S) and the small patch reefs found on the central/southern coast of the Espírito Santo State (19°–20° S). The newly discovered reefs harbour a relatively rich and abundant reef community, with 73 fish and 14 benthic cnidarian species, including endangered and commercially important ones. We discuss on urgent needs of properly mapping and understanding the ecological functioning of this reef system. Information provided here is a baseline for future impact evaluations, particularly considering the recent worst environmental disaster of Brazil from a dam collapse in Doce river that affected the region.  相似文献