Agricultura irrigada: a importância da adubação.

A fertilidade do solo nos perímetros irrigados do Nordeste: Perímetro irrigado de Bebedouro - Petrolina-PE; Perímetro irrigado de Mandacaru - Juazeiro-BA; Perímetro irrigado Senador Nilo Coelho - Petrolina-PE; Perímetros irrigados do Submédio São Francisco; Perímetro Irrigado Itans/Sabugi - Caicó-RN; Perímetro Irrigado do Brumado - Livramento do Brumado-BA; Perímetro Irrigado de Morada Nova - Morada Nova-CE; Distribuição do sistema radicular das culturas em sistemas irrigados e a disponibilidade de nutrientes; A fertirrigação e o fator de retardamento; Mecanismos de resposta das plantas à salinidade; Disponibilidade de nutrientes em solos afetados por sais

Easy resolution of severe obstructive kidney injury

Chronic constipation is a common diagnosis with a high prevalence in the elderly. Constipation affects the quality of life of sick individuals, bringing several clinical complications.info:eu-repo/semantics/publishedVersio

Supercurrent induced domain wall motion

We study the dynamics of a magnetic domain wall, inserted in, or juxtaposed to, a conventional superconductor, via the passage of a spin polarized current through a FSF junction. Solving the Landau-Lifshitz-Gilbert equation of motion for the magnetic moments we calculate the velocity of the domain wall and compare it with the case of a FNF junction. We find that in several regimes the domain wall velocity is larger when it is driven by a supercurrent.Comment: 10 pages, 8 figure

Mineralização de nitrogênio e de potássio de estercos em função da profundidade e do tempo de incorporação.

Este trabalho teve como objetivo determinar o teor e a quantidade mineralizada de nitrogênio e potássio em dois estercos (bovino e caprino), quando incorporados a diferentes profundidades, ao longo do tempo, sob irrigação por microaspersão

Periodic Neural Activity Induced by Network Complexity

We study a model for neural activity on the small-world topology of Watts and Strogatz and on the scale-free topology of Barab\'asi and Albert. We find that the topology of the network connections may spontaneously induce periodic neural activity, contrasting with chaotic neural activities exhibited by regular topologies. Periodic activity exists only for relatively small networks and occurs with higher probability when the rewiring probability is larger. The average length of the periods increases with the square root of the network size.Comment: 4 pages, 5 figure

Murcha-de-Phytomonas do coqueiro: uma ameaça à cultura no Amazonas.

Ocorrência. Sintomas. Disseminação. Controle. Controle dos insetos vetores.bitstream/item/122321/1/Folder-murcha-de-phytomonas.pd

Random Sequential Adsorption: From Continuum to Lattice and Pre-Patterned Substrates

The random sequential adsorption (RSA) model has served as a paradigm for diverse phenomena in physical chemistry, as well as in other areas such as biology, ecology, and sociology. In the present work, we survey aspects of the RSA model with emphasis on the approach to and properties of jammed states obtained for large times in continuum deposition versus that on lattice substrates, and on pre-patterned surfaces. The latter model has been of recent interest in the context of efforts to use pre-patterning as a tool to improve selfassembly in micro- and nanoscale surface structure engineering

Robust exponential decay of correlations for singular-flows

We construct open sets of Ck (k bigger or equal to 2) vector fields with singularities that have robust exponential decay of correlations with respect to the unique physical measure. In particular we prove that the geometric Lorenz attractor has exponential decay of correlations with respect to the unique physical measure.Comment: Final version accepted for publication with added corrections (not in official published version) after O. Butterley pointed out to the authors that the last estimate in the argument in Subsection 4.2.3 of the previous version is not enough to guarantee the uniform non-integrability condition claimed. We have modified the argument and present it here in the same Subsection. 3 figures, 34 page