Stratified zig-zags on vortex pairs using vertically shifted perturbations

accepte

Avaliação dos impactos econômicos, sociais e ambientais de tecnologias geradas pela Embrapa Trigo - ano base 2007.

bitstream/CNPT-2010/40714/1/p-do96.pd

Heavy quasiparticles in the ferromagnetic superconductor ZrZn2

We report a study of the de Haas-van Alphen effect in the normal state of the ferromagnetic superconductor ZrZn2. Our results are generally consistent with an LMTO band structure calculation which predicts four exchange-split Fermi surface sheets. Quasiparticle effective masses are enhanced by a factor of about 4.9 implying a strong coupling to magnetic excitations or phonons. Our measurements provide insight in to the mechanism for superconductivity and unusual thermodynamic properties of ZrZn2.Comment: 5 pages, 2 figures (one color

Stratified zig-zags on vortex pairs using vertically shifted perturbations

accepte

Emissão de N2O por sistemas de manejo de solo em Passo Fundo, RS.

Orientador: Anderson Santi

Carbono acumulado por sistemas de manejo do solo em experimento de longa duração, em Passo Fundo, RS.

Orientador: Fabiano Daniel De Bona

synchronous angiosarcoma melanoma and morphea of the breast skin 14 years after radiotherapy for mammary carcinoma

n/

Impactos da simulação de ocorrência de chuva ácida artificial nos sistemas agrícolas do sul do Brasil - 2012 a 2014: Quem é mais sensível, as plantas ou o solo?

Orientador: Aldemir Pasinato

Temporal dynamics of spectral reflectance and vegetation indices during canola crop cycle in southern Brazil

The objective of this study was to characterize the variability of spectral reflectance and temporal profiles of vegetation indices associated with nitrogen fertilization, crop cycle periods, and weather conditions of the growing season in canola canopies in southern Brazil. An experiment was carried out during the 2013 and 2014 canola growing seasons at EMBRAPA Trigo, Passo Fundo, state of Rio Grande do Sul, Brazil. The experiment was conducted in a randomized block design with four replications. Five doses of nitrogen top dressing were used as treatments: 10, 20, 40, 80, and 160kg ha-1. Measurements were obtained with the spectroradiometer positioned above the canopy, to construct spectral reflectance curves for canola and establish temporal profiles for several vegetation indices (SR, NDVI, EVI, SAVI, and GNDVI). In addition, data on shoot dry matter were obtained and phenological stages were determined. The spectral reflectance curves of canola were reported to change with canopy growth and development. Temporal profiles of vegetation indices showed two maximum peaks, one before flowering and other after flowering. The indices SR, NDVI, EVI, SAVI, and GNDVI were able to characterize changes in the canola canopy over time, as a function of phenological phases, weather conditions, and nitrogen fertilization, throughout the development cycle. Plant growth and development, variations in crop management, and environmental conditions affect the spectral response of canol