Understanding Extended Projected Profile (EPP) Trajectory Error Using a Medium-Fidelity Aircraft Simulation

A critical component of Trajectory-Based Operations is the ability for a consistent and accurate 4-dimensional trajectory to be shared and synchronized between airborne and ground systems as well as amongst various ground automation systems. The Aeronautical Telecommunication NetworkBaseline 2 standard defines the Extended Projected Profile (EPP) trajectory that can be sent via Automatic Dependent Surveillance-Contract from an aircraft to ground automation. The EPP trajectory message contains a representation of the reference trajectory from an aircrafts Flight Management System (FMS). In this work, a set of scenarios were run in a medium-fidelity aircraft and FMS simulation to perform an initial characterization of EPP trajectory errors under a given set of conditions. The parameters investigated were the route length, route type, wind magnitude error, wind direction error, and with and without a required time-of-arrival constraint

Connectivity-Enforcing Hough Transform for the Robust Extraction of Line Segments

Global voting schemes based on the Hough transform (HT) have been widely used to robustly detect lines in images. However, since the votes do not take line connectivity into account, these methods do not deal well with cluttered images. In opposition, the so-called local methods enforce connectivity but lack robustness to deal with challenging situations that occur in many realistic scenarios, e.g., when line segments cross or when long segments are corrupted. In this paper, we address the critical limitations of the HT as a line segment extractor by incorporating connectivity in the voting process. This is done by only accounting for the contributions of edge points lying in increasingly larger neighborhoods and whose position and directional content agree with potential line segments. As a result, our method, which we call STRAIGHT (Segment exTRAction by connectivity-enforcInG HT), extracts the longest connected segments in each location of the image, thus also integrating into the HT voting process the usually separate step of individual segment extraction. The usage of the Hough space mapping and a corresponding hierarchical implementation make our approach computationally feasible. We present experiments that illustrate, with synthetic and real images, how STRAIGHT succeeds in extracting complete segments in several situations where current methods fail.Comment: Submitted for publicatio

Satisfação conjugal e satisfação com a vida em mulheres casadas e recasadas: um estudo comparativo

Dissertação de mest., Psicologia Clínica e da Saúde, Faculdade de Ciências Humanas e Sociais, Univ. do Algarve, 2010Apesar do aumento significativo de reacasalamentos e recasamentos, existem escassos estudos empíricos sobre as dimensões que concernem o casal, diluindo-o prontamente nos estudos sobre reconstituições familiares. Este trabalho pretende explorar a satisfação conjugal e a satisfação com a vida de 168 mulheres, onde 108 são casadas pela primeira vez e 60 casadas pela segunda vez. As mulheres em primeiro casamento revelaram-se mais positivas com a vida enquanto as mulheres em segundo casamento mostraram menor expressão emocional. No entanto, estas mulheres revelaram-se mais íntimas e mais próximas dos seus parceiros e simultaneamente mais autónomas e preocupadas com as suas funções familiares. Os dois grupos de mulheres não se diferenciaram no que diz respeito à satisfação conjugal e à satisfação com a vida. Os resultados apontam também para a importância que os filhos - biológicos ou enteados, de primeiro casamento ou de segundo – têm, nos estados emocionais positivos destas mulheres. Propõem-se estudos mais profundos e complementares de cariz longitudinal sobre estas e outras variáveis articuladoras no âmbito da mesma temática

Transtorno Do Déficit De Atenção E Hiperatividade Em Pacientes Em Reabilitação De Drogadição

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Attention Deficit-hyperactivity Disorder In Patients In Rehabilitation Drug Addiction

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Transtorno do déficit de atenção e hiperatividade em pacientes em reabilitação de drogadição

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Patterns in nature, emergent urbanism and the implicate order

This research is about the scientific understanding of the concept of "life" in urban space and its main purpose is to explain the underlying order that is present in organic cities. It was found that this order is emergent (bottom-up),a product of a self-organization, a fractal geometry that characterizes the geometries of Nature which is substantially different from the visual order (top-down) we are used to look at our cities.The biological metaphor in city planning has been used since the sixteenth century. However, this analogy has been made mainly because of its shape and appearance rather than by the investigation of their geometric properties and laws of formation. Checking the parallel between the geometries of Nature and the geometries of the organic city, through the recognition of a set of patterns and emergent properties I conclude with this work that these forms and structures emerge for the same reason: the constraints of physical space and the laws of nature are the same everywhere. Thesefundamental lawswhich governall live-systems phenomena showthat in spite of apparently amorphous growth of urban sprawl, resilient patterns emerge. Once we know the principles we can use them to improve our plans and designs. We shouldtrust to the self-organizingprinciples of cities rather than impose ideas of what theyshould look like.info:eu-repo/semantics/acceptedVersio