Dynamic optical filtration

A dynamic optical filtration system and method effectively blocks bright light sources without impairing view of the remainder of the scene. A sensor measures light intensity and position so that selected cells of a shading matrix may interrupt the view of the bright light source by a receptor. A beamsplitter may be used so that the sensor may be located away from the receptor. The shading matrix may also be replaced by a digital micromirror device, which selectively sends image data to the receptor

PV systems control using fuzzy logic controller employing dynamic safety margin under normal and partial shading conditions

Because of the unpredictable activity of solar energy sources, photovoltaic (PV) maximum power point tracking (MPPT) is essential to guarantee the continuous operation of electrical energy generation at optimal power levels. Several works have extensively examined the generation of the maximum power from the PV systems under normal and shading conditions. The fuzzy logic control (FLC) method is one of the effective MPPT techniques, but it needs to be adapted to work in partial shading conditions. The current paper presents the FLC-based on dynamic safety margin (DSM) as an MPPT technique for a PV system to overcome the limitations of FLC in shading conditions. The DSM is a performance index that measures the system state deviation from the normal situation. As a performance index, DSM is used to adapt the FLC controller output to rapidly reach the global maxima of the PV system. The ability of the proposed algorithm and its performance are evaluated using simulation and practical implementation results for single phase grid-connected PV system under normal and partial shading operating conditions.Peer ReviewedPostprint (published version

Respon Morfo-Fisiologi Genotipe Kedelai terhadap Naungan Jagung dan Ubikayu

Study on soybeans morpho-physiological responses in artificial or natural shade are beneficial to determine the effects of shade on morpho-physiology and yield of soybean. This research was aimed to study the morpho-physiological responses of soybean varieties under shading of maize and cassava compared to arficial shading. The research was conducted in Kendalpayak Research Station, ILETRI, from February to May 2016 used split plot design with three replications. The main plot was three shade sources: N1:black paranet 50%, N2: maize shade, and N3: cassava shade, while the sub plot was five soybean varieties: Dena 1, Dena 2, Argopuro, Panderman, and Grobogan. Soybean varieties showed morpho-physiology differences depending on the shade source. Soybean grown under shading of cassava had plant height, leaf area ratio, and leaf area lower than under shading of paranet and maize. Cassava shade also caused soybean had higher growth rate, net assimilation rate, and yield than those under paranet and maize shade. Shade-tolerant varieties (Dena 1 and Dena 2) had high yield on all kind of shade. Less tolerant varieties (Panderman and Grobogan) had higher yield under cassava shade and lower yield under paranet and maize shade. Maize crop had similar shade effects with 50% paranet shade

Design of a multimodal rendering system

This paper addresses the rendering of aligned regular multimodal datasets. It presents a general framework of multimodal data fusion that includes several data merging methods. We also analyze the requirements of a rendering system able to provide these different fusion methods. On the basis of these requirements, we propose a novel design for a multimodal rendering system. The design has been implemented and proved showing to be efficient and flexible.Postprint (published version