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Quality of performance of the operation of sugarcane mechanized planting in day and night shifts
(2013-08-20)
The sugarcane mechanized planting is becoming increasingly widespread in Brazil due to a higher operability and better working conditions offered to workers compared to other types of planting. Studies related to this topic ...
Chain recurrence and average shadowing in dynamics
(2021-01-01)
We investigate several notions related to pseudotrajectories, including chain recurrence and shadowing properties, for a special class of diffeomorphisms on euclidean spheres, known as spherical linear transformations, and ...
Combined (13)C NMR and DFT/GIAO studies of the polyketides Aurasperone A and Fonsecinone A
(Wiley-Blackwell, 2008-11-05)
Structural characterization by NMR spectroscopy and DFT calculations was performed for two dimeric naptho-gamma-pyrones, the polyketides Aurasperone A and Fonsecinone A. Experimental data ((13)C NMR chemical shifts and ...
Catastrophic regime shift in water reservoirs and São Paulo water supply crisis
(Public Library Science, 2015)
The relation between rainfall and water accumulated in reservoirs comprises nonlinear feedbacks. Here we show that they may generate alternative equilibrium regimes, one of high water-volume, the other of low water-volume. ...
Dos Técnicas Robustas para la Segmentación de Imágenes BiomédicasTwo Robust Techniques for Segmentation of Biomedical Images
(Computación y Sistemas, 2009)
Advances in phase-stepping real-time holography using photorefractive sillenite crystals
(2006-01-01)
This work presents a review of recent developments in phase-stepping real-time holographic interferometry with photorefractive sillenite crystals. Quantitative results are shown in micro-rotation, micro-displacement, and ...
Advances in phase-stepping real-time holography using photorefractive sillenite crystals
(Natl Inst Optoelectronics, 2006-08-01)
This work presents a review of recent developments in phase-stepping real-time holographic interferometry with photorefractive sillenite crystals. Quantitative results are shown in micro-rotation, micro-displacement, and ...
A Novel Method to Predict Genomic Islands Based on Mean Shift Clustering Algorithm
(CIENCIAS, 2016)
Genomic Islands (GIs) are regions of bacterial genomes that are acquired from other organisms by the phenomenon of horizontal transfer. These regions are often responsible for many important acquired adaptations of the ...
Pressure Dependence of N-15 Chemical Shifts in Model Peptides Ac-Gly-Gly-X-Ala-NH2
(MDPI AGBASEL, 2012)
High pressure NMR spectroscopy has developed into an important tool for studying conformational equilibria of proteins in solution. We have studied the amide proton and nitrogen chemical shifts of the 20 canonical amino ...