Zobrazeno 1 - 10 of 25 pro vyhledávání: '"J. M. de Freitas"'
1
Monitoramento da estrutura e caracterização ecológica em floresta tropical manejada na Amazônia Brasileira
Autor: L. S. da Costa, Alba Valéria Rezende, Quétila Souza Barros, L. J. M. de Freitas, L. S. Murta Júnior, E. K. B. de Oliveira
Publikováno v: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice)
Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
Neste estudo foram discutidos aspectos da composição florística, diversidade de espécies e estrutura diamétrica de uma floresta manejada, no município de Paragominas, Pará. Os dados foram obtidos em dois transectos de 100 x 900 m equivalendo a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2da084ad249467a61b2558b0d95758d3
https://doi.org/10.5039/agraria.v14i4a6867
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2
Looking beyond forest cover: an analysis of landscape-scale predictors of forest degradation in the Brazilian Amazon
Autor: Johan Oszwald, Damien Arvor, L. J. M. de Freitas, J. Baudry, Hélène Dessard, Lilian Blanc, R. Le Roux, Louis Reymondin, Julie Betbeder, S. Le Clech, Valéry Gond, Clément Bourgoin, Peter Läderach, H. Boussard
Publikováno v: Environmental Research Letters
Environmental Research Letters, IOP Publishing, 2021, 16 (11), pp.114045. ⟨10.1088/1748-9326/ac31eb⟩
Environmental Research Letters, 16(11)
Environmental Research Letters 16 (2021) 11
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice)
Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
While forest degradation rates and extent exceed deforestation in the Brazilian Amazon, less attention is given to the factors controlling its spatial distribution. No quantified correlation exists between changes of forest structure due to anthropog
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31b8ec50e5c64f167d6e98f6e04ea444
https://halshs.archives-ouvertes.fr/halshs-03506996/file/Bourgoin_2021_Environ._Res._Lett.pdf
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3
Flow-Injection Amperometric Method for Determination of Diclofenac in Pharmaceutical Formulations Using a Boron-Doped Diamond Electrode
Autor: Rodrigo A.A. Munoz, J. M. de Freitas, Denise Tofanello Gimenes, Eduardo M. Richter
Publikováno v: Electroanalysis. 23:2521-2525
This paper describes the determination of diclofenac (DCF) in pharmaceutical formulations using flow injection method with multiple pulse amperometric detection. Unmodified boron-doped diamond (BDD) is used as working electrode and 0.10 mol L−1 sul
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2d1b5822d8f590e1c60368ef2117308f
https://doi.org/10.1002/elan.201100126
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5
Probability density functions for intensity induced phase noise in CW phase demodulation systems
Autor: J M De Freitas
Publikováno v: Measurement Science and Technology. 18:3592-3602
This paper discusses two probability density functions related to continuous wave (CW) phase demodulation systems such as those used in optical sensing. In the first case, we show that if the input intensity noise in the quadrature streams of the dem
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::97c1d198a8239d1d45e675510f4b32e3
https://doi.org/10.1088/0957-0233/18/11/044
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6
Measurement of sensor axis misalignment in fibre-optic accelerometers
Autor: J P F Wooler, J M De Freitas, P J Nash
Publikováno v: Measurement Science and Technology. 17:1819-1825
A method is described for the measurement of sensor axis misalignment relative to its mounting can for a fibre-optic accelerometer. The accelerometers investigated were based on the common cylindrical compliant mandrel design and mounted acceleromete
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::620446b1b0ab047d0d4eede205a6ca75
https://doi.org/10.1088/0957-0233/17/7/021
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7
Noise attenuation properties of non-recursive FIR filters
Autor: J M De Freitas
Publikováno v: Measurement Science and Technology. 14:1701-1713
The noise filtering properties of digital filters are studied using the classic analogue Butterworth model. We derive simple expressions for the noise power output associated with low-pass, band-pass, high-pass, band-reject and types III and IV Mth-o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::89fa16265c65978b6f5624683e4fd45c
https://doi.org/10.1088/0957-0233/14/9/323
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8
Calibration of an optical fluorescence method for film thickness measurement
Autor: Guy John Gregory, James S. Barton, J. M. De Freitas, Anita C. Jones, J. Muhl, Michael Millington
Publikováno v: Measurement Science and Technology. 12:N23-N27
We describe the calibration of a technique allowing quantitative measurements of industrial coatings with thicknesses as small as 10-20 nm. Wax films doped with fluorescent rhodamine dye have been deposited by an electrospray method onto an optically
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8ff15478026a4deb3940cf2dca505b83
https://doi.org/10.1088/0957-0233/12/5/401
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10
Polarization Effects in Heterodyne Interferometry
Autor: Michael A. Player, J M De Freitas
Publikováno v: Journal of Modern Optics. 42:1875-1899
A detailed analysis of the polarization effects which lead to nonlinearity in the non-ideal optical heterodyne interferometer is presented. Extensive use is made of the coherency matrix representation by setting up a ‘cross-coherency matrix’ repr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5aec4114b2d7d55dffcb00100598bd1f
https://doi.org/10.1080/09500349514551641
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