This study aimed to evaluate the nutrition and yield of common bean according to the application of different doses of organomineral formulations (OMF), using filter cake as a basic organic compound in the presence and absence of nitrogen. The experiments was implemented and conducted in June "autumn/winter season" and November "rainy season" of the 2018 e 2018/2019 harvest, respectively. A randomized block design was used in a 6 x 2 factorial scheme, with four replications. The treatments were composed of six organomineral formulation doses: (0, 30, 60, 90, 120, and 150 kg ha− 1), with and without the addition of a nitrogen dose of 40 kg ha− 1, using urea as the mineral source. It was concluded that the organomineral fertilizer based on filter cake showed greater absorption of macronutrients N and K, an increase in the 100-grain weight, number of grains per pod, number of pods per plant, and grain yield in comparison with the absence of fertilization or mineral fertilizers, highlighting the doses of 90 and 150 kg ha− 1. The use of OMFs is a viable alternative with great potential for soil fertilization in agricultural production, besides the environmental sustainability generated by their inclusion in the production cycle of common bean.

Neste artigo, analisa-se um tipo de multiplexador add-drop em fibra óptica através da teoria de modos acoplados. A teoria de modos acoplados descreve tanto o acoplamento entre as ondas incidentes e refletidas quanto o acoplamento entre dois guias ópticos que formam o acoplador direcional usado no multiplexador add-drop. Este multiplexador permite a extração e inserção simultânea de um canal de comunicações em um sistema de W.D.M. O multiplexador a ser analisado possui duas grades de Bragg inscritas nos diferentes canais.

Neste artigo, novas grades de Bragg são propostas, combinando a presente tecnologia de grades de Bragg com seqüências pseudo-aleatórias (PN). O principal objetivo da utilização dessas seqüências é projetar grades de Bragg em que se possa controlar seu espectro passa-faixa. O espectro de refletividade dessas grades assemelha-se bastante a das funções pseudoaleatórias, como será demonstrado em alguns exemplos.

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