Background: Chronic obstructive pulmonary disease (COPD) is associated with cardiovascular disease.We investigated whether sleeping at altitude increases nocturnal heart rate (HR) and other markers of cardiovascular risk or arrhythmias in lowlanders with COPD and whether this can be prevented by nocturnal oxygen therapy (NOT).Methods: Twenty-four C
Geometry Design for DOA Estimation in Seismic 2D-Arrays: Simulation Study
Sensor array geometry has a direct impact on the direction-of-arrival (DOA) estimation of a seismic signal.In this paper, we design a planar array that aims to optimize the DOA estimation of a narrowband signal in the sense of the minimum mean-squared-periodic-error (MSPE) obtained by the maximum a-posteriori (MAP) estimator of the DOA.We investiga
Giant Dermatofibroma: A Rare Presentation as a Large Scaly Plaque
A 12n/1200 wella rare form of dermatofibroma (DF) is described in the literature as giant dermatofibroma.Due to the rarity and distinct presentation that can be confused with more sinister skin tumours, these can cause diagnostic uncertainty and require clinicopathologic correlation.Familiarity with this rare presentation of an otherwise common ent