Zobrazeno 1 - 10 of 14 pro vyhledávání: '"L. A. V. CARVALHO"'
1
Akademický článek
Brief Communication: An electrifying atmospheric river – understanding the thunderstorm event in Santa Barbara County during March 2019
Autor: D. Nash, L. M. V. Carvalho
Publikováno v: Natural Hazards and Earth System Sciences, Vol 20, Pp 1931-1940 (2020)
On 5 March 2019 12:00 UTC, an atmospheric river (AR) made landfall in Santa Barbara, CA, and lasted approximately 30 h. While ARs are typical winter storms in the area, the extraordinary number of lightning strikes observed near coastal Santa Bar
Externí odkaz: https://doaj.org/article/dc96fe6c4a8941a7aad63c8babf76f7b
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2
Akademický článek
Measuring higher order optical aberrations of the human eye: techniques and applications
Autor: L. Alberto V. Carvalho, J.C. Castro, L. Antonio V. Carvalho
Publikováno v: Brazilian Journal of Medical and Biological Research, Vol 35, Iss 11, Pp 1395-1406 (2002)
In the present paper we discuss the development of "wave-front", an instrument for determining the lower and higher optical aberrations of the human eye. We also discuss the advantages that such instrumentation and techniques might bring to the ophth
Externí odkaz: https://doaj.org/article/d37bb225d08642fb83504c647c2ca10b
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3
Akademický článek
Anti-persistence in the global temperature anomaly field
Autor: L. M. V. Carvalho, A. A. Tsonis, C. Jones, H. R. Rocha, P. S. Polito
Publikováno v: Nonlinear Processes in Geophysics, Vol 14, Iss 6, Pp 723-733 (2007)
In this study, low-frequency variations in temperature anomaly are investigated by mapping temperature anomaly records onto random walks. We show evidence that global overturns in trends of temperature anomalies occur on decadal time-scales as part o
Externí odkaz: https://doaj.org/article/3070c07fd06d49f3bdc81cf3e708b745
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4
Akademický článek
Complexity and predictability of daily precipitation in a semi-arid region: an application to Ceará, Brazil
Autor: M. E. S. Silva, L. M. V. Carvalho, M. A. F. da Silva Dias, T. de M. B. S. Xavier
Publikováno v: Nonlinear Processes in Geophysics, Vol 13, Iss 6, Pp 651-659 (2006)
Complexity and predictability of daily precipitation in a tropical semi-arid region (Ceará State, Brazil) is assessed by applying entropy concepts. Precipitation regimes in that region depend on several dynamical forcings, the most important being t
Externí odkaz: https://doaj.org/article/b3d5a81f0fd94a99b45f4571a215278e
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5
Measuring higher order optical aberrations of the human eye: techniques and applications
Autor: J.C. Castro, L. Alberto V. Carvalho, L. Antonio V. Carvalho
Publikováno v: Brazilian Journal of Medical and Biological Research, Vol 35, Iss 11, Pp 1395-1406 (2002)
Brazilian Journal of Medical and Biological Research v.35 n.11 2002
Brazilian Journal of Medical and Biological Research
Associação Brasileira de Divulgação Científica (ABDC)
instacron:ABDC
Brazilian Journal of Medical and Biological Research, Volume: 35, Issue: 11, Pages: 1395-1406, Published: NOV 2002
In the present paper we discuss the development of "wave-front", an instrument for determining the lower and higher optical aberrations of the human eye. We also discuss the advantages that such instrumentation and techniques might bring to the ophth
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e741fc5b56cd3b5bf9a464d786ecf5e0
https://doi.org/10.1590/s0100-879x2002001100019
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6
Difference Equations∶ Detecting Oscillations via Higher Order Characteristic Equations
Autor: L. A. V. Carvalho, Luiz Augusto da Costa Ladeira
Publikováno v: Journal of Difference Equations and Applications. 8:277-291
In these notes we introduce an alternative procedure to detect the presence of a wide range of oscillatory solutions-the exponential oscillatory ones-in both continuous-time and discrete linear difference equations. The technique is addressed to the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6630cae0fa7c6d5f0bf741e9526419a0
https://doi.org/10.1080/10236190211953
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8
Modeling distributed concept representation in Hopfield neural networks
Autor: L. A. V. Carvalho
Publikováno v: Mathematical and Computer Modelling. 30:225-242
Learning in neural networks is usually identified with alterations in the networks connections. Learning rules perform these alterations gradually and are based on the deviation between the desired and effective responses to a stimulus. Learning can
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e4b8e27b22a303cef8c8775b4052972
https://doi.org/10.1016/s0895-7177(99)00126-0
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10
On dichotomic maps for a class of differential-difference equations
Autor: L. A. V. Carvalho, K. L. Cooke
Publikováno v: Proceedings of the Royal Society of Edinburgh: Section A Mathematics. 117:317-328
SynopsisStability and asymptotic stability of the null solution of the differential-difference equation (E)x′(t) = f(x(t), x(t − r)), f: RNxRN → RN, f(0, 0) = 0, are studied by means of an extension of the Liapunov–Razumikhin method. Let V: R
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::834ed4a9f2c81f200c10c0000d74a02c
https://doi.org/10.1017/s0308210500024768
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