In Vivo Mapping of the Choriocapillaris in High myopia: a Widefield Swept Source Optical Coherence Tomography Angiography

To report variation of choriocapillaris (CC) flow in widefield in high in myopic subjects compared with an age-matched normal control group using ultra widefield optical coherence tomography angiography (UW-OCTA). This is a Prospective, cross-sectional study. Thirty high myopia subjects and fifty healthy subjects were enrolled. Healthy and high myopia subjects were imaged with the SS-OCTA system (PLEX Elite 9000, Carl Zeiss Meditec Inc., Dublin, CA, USA). For each eye, five 12 × 12-mm OCTA volume scans were acquired. The en face CC images were then exported to imageJ and a semi-automated algorithm was used for subsequent quantitative analysis. The main outcome was a quantitative analysis of the CC. This analysis was performed in three different regions: (i) peripapillary, (ii) macular, and (iii) periphery. In addition, CC variables were further investigated in distinct fields within these three different regions. Thirty myopic eyes (32 subjects; myopic group) and fifty eyes (50 subjects; control group) without elevated myopia were included in the analysis. Mean ± SD age was 26.9 ± 2.9 years [median: 27 years; range: 20.0–40.0 years]. Mean ± SD axial length was 26.6 ± 0.6 mm [median: 26.2 mm; range: 26.1 to 28.0 mm]. Mean ± SD axial length was 26.6 ± 0.6 mm [median: 26.2 mm; range: 26.1 to 28.0 mm] in the myopic group and 23.9 ± 1.1 mm [median: 23.9 mm; range: 21.8 to 25.9 mm] in the control group. The total signal void area was significantly greater in myopic eyes compared with control group. The peripapillary region exhibited the greatest total signal void area (p < 0.0001 vs macular region, p < 0.0001 vs peripheral region). Within the macular region, the foveal area exhibited a greater total signal void area in comparison with both the parafoveal area (p < 0.0001) and the perifoveal area (p < 0.0001). In conclusion we report quantitative mapping of the choriocapillaris in myopic eyes compared with an age-matched normal control group. The CC perfusion appears to have a wide topographical variation

Estimativa de áreas favoráveis à ocorrência da Diaphorina citri (vetor do greening asiático) no Estado de São Paulo.

This work presents a methodological proposal to estimate favorable areas of occurrence of the psilid D. citri in São Paulo State, applying geoprocessing tools, climatic data and a model of developmental rate of insects. Favorability maps were obtained adopting the temperature levels and its effects in D. citri development. The spatial distribution maps of the monthly reproductive rate were obtained applying a literature model (modified Logan model). The North and Northwest regions of the State were classified as ?favorable? or ?very favorable? to the development of D. citri during all blooming period of citrus (August to March). The Central and South regions were classified only as ?favorable? from September. The monthly reproductive rate of D. citri followed the same pattern. The methodology was adequate to estimate the favorable areas to the occurrence of D. citri, indicating a potential to be used in risk analysis studies of quarentenary insects and pests of recent introduction as the greening. New variables can be added to the model as new knowledge of biology of this insect becomes available for the São Paulo State citric grown area

Estimativa de áreas favoráveis à ocorrência da Diaphorina citri (vetor do greening asiático) no Estado de São Paulo.

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Concepção e desenvolvimento de um sistema de previsão da safra de milho para o Brasil.

Devido as grandes diferenças tecnológicas empregadas na produção nacional de milho, de norte a sul do país, caracterizando regiões distintas, com diferentes níveis de Índice de Desenvolvimento Humano Municipal (IDH), área e população rural, tamanho da propriedade, entre outras, diferentes formas de relevo e clima, o que dificulta realizar previsão de safra pelo simples uso da modelagem agrometeorológica, o artigo tem por objetivo apresentar parte metodolológica de concepção e desenvolvimento de um sistema de previsão de safra de milho para o Brasil, estabelecendo relações entre índices socioeconômicos e a produtividade

Correct quantum chemistry in a minimal basis from effective Hamiltonians

We describe how to create ab-initio effective Hamiltonians that qualitatively describe correct chemistry even when used with a minimal basis. The Hamiltonians are obtained by folding correlation down from a large parent basis into a small, or minimal, target basis, using the machinery of canonical transformations. We demonstrate the quality of these effective Hamiltonians to correctly capture a wide range of excited states in water, nitrogen, and ethylene, and to describe ground and excited state bond-breaking in nitrogen and the chromium dimer, all in small or minimal basis sets