A irrigação de pomares cítricos em Sergipe.

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Autotetraploid urochloa ruziziensis breeding.

IFTBC 201

Eficiência de fungos micorrízicos arbusculares (FMAs) em colonizar e beneficiar o crescimento de mudas micropropagadas de cará-da-costa.

Este trabalho foi conduzido na Embrapa Agrobiologia com o objetivo de avaliar a eficiência de espécies de FMAs quanto à capacidade de colonizar e promover o crescimento de mudas micropropagadas de cará-da-costa (Dioscorea cayenensis Lam). Estudaram-se quatro tratamentos: inoculação com três espécies de FMAs (Glomus clarum, Glomus etunicatum e Gigaspora margarita), e uma testemunha não inoculada (Ni). As plântulas inoculadas apresentaram maior colonização micorrízica que as Ni. G. etunicatum apresentou maior esporulação que as outras espécies e maior colonização que G. margarita. As partes aéreas apresentaram amarelecimento e secagem provavelmente pelo amadurecimento dos microtubérculos e término do ciclo da cultura. A maior secagem ocorreu em G. margarita sugerindo aceleração do amadurecimento. G. clarum e G. etunicatum foram mais eficientes em colonizar o cará-da-costa. Não houve efeito dos tratamentos no crescimento das plantas.Suplemento. Edição do 43 Congresso Brasileiro de Olericultura, Recife, jul. 2003

Photogrammetry for digital reconstruction of railway ballast particles – a cost-efficient method

Ballast aggregate is a natural material widely used in railway lines. Its mechanical properties and particle geometry are meticulously defined using well-established standards and characterisation procedures. Though extensively validated, these procedures have some limitations: they are operator dependent; only provide major particle dimensions; do not inform on surface colour; nor allow for advanced particle wear analysis or particle-based simulations. This work presents a cost-efficient photogrammetry method for 3D reconstruction of ballast particles, as an alternative to the significantly expensive laser scanning. It produces digital models of equivalent or higher quality, allowing for advanced and automated particle geometry analyses. Particle meshes produced here are shared among researchers.info:eu-repo/semantics/acceptedVersio

Find_Me: IoT indoor guidance system

This work presents an approach to combine location information from beacons and local building information to give real time location and guidance to a user inside a building. This information can help users orientation inside unknown buildings and the data stored from different users can provide useful information about users movements inside public building. Beacons are installed on the building and emit signals that give a geographic position with an associated imprecision, related with Bluetooth’s range. This uncertainty is handle by building layout and users’ movement in a developed system that maps users position, gives guidance and store user movements. This system is based on a App (Find Me!) for Android OS (Operating System) which captures the Bluetooth Low Energy (BLE) signal coming from the beacon(s) and shows, through a map, the location of the user ‘s smart phone and guide him to the desired destinationinfo:eu-repo/semantics/acceptedVersio

Robotic construction analysis: Simulation with virtual reality

Advances in robotic construction are evident and increasing every year, bringing present and potential improvements. However, the economic and social impacts are hard to assess and quantify without physical in situ testing, which is expensive and time-consuming. This paper presents a methodology for the simulation of robotic construction technologies, namely drones, using a virtual reality environment. Our hypothesis is that a virtual reality simulation of a robotic construction (H1) has the potential of increasing the precision of predicting the construction duration and cost and (H2) allows for the detection of construction problems. The study begins with a review of the literature on drones, robotic arms, and hybrid automatic construction solutions, as well as virtual reality construction simulations, summarising the robotic technologies currently being used, mainly in academic research, to assemble construction elements. It then proposes a construction simulation methodology applied to three architectonic elements to analyse different approaches and different scenarios for robotic construction simulation methodology. A construction simulation is tested, and the data is analysed and compared with traditional construction methods, focussing on construction time and costs.info:eu-repo/semantics/publishedVersio