Rafael Fraga

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Erythema elevatum diutinum is a chronic and rare cutaneous leukocytoclastic vasculitis, characterized by red, purple and yellow papules, plaques and nodules, distributed symmetrically on the extensor surfaces of the limbs. It is associated with several autoimmune, neoplastic and infectious processes, mainly hematological malignancies in about 30% of the(More)
This paper presents Unmanned Aircraft Systems (UAS) modeling and simulation for Houston metroplex conducted under the FAA System Safety Management Transformation (SSMT) program. The modeling and simulation utilizes a use case scenario that is consistent with the FAA's concept of operations for integration of UAS into the National Airspace System. The use(More)
This paper presents an approach for safety assessment in unmanned aerial system (UAS) operations that uses stochastic fast-time simulation and selected published ground impact fatality/casualty models to calculate fatality risk. The application of simulation allows a sensitivity analysis measuring how different aspects and phases of a UAS operation impact(More)
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