GEODETIC SEAFLOOR POSITIONING USING AN UNMANNED SURFACE VEHICLE—CONTRIBUTION OF DIRECTION-OF-ARRIVAL OBSERVATIONS

Geodetic Seafloor Positioning Using an Unmanned Surface Vehicle—Contribution of Direction-of-Arrival Observations

Precise underwater geodetic positioning remains a challenge.Measurements combining surface positioning (GNSS) with underwater acoustic positioning are generally performed from research vessels.Here we tested an alternative approach using a small Unmanned Surface Vehicle (USV) with a compact GNSS/Acoustic experimental set-up, easier to deploy, and m

read more

Efficacy and safety of inhaled heparin in asthmatic and chronic obstructive pulmonary disease patients: a systematic review and a meta-analysis

Abstract Asthma and chronic obstructive pulmonary disease (COPD) are prevalent chronic respiratory disorders that cause significant morbidity and mortality.Some studies evaluated the use of inhaled unfractionated heparin (UFH) in the treatment of asthma and COPD.We aimed to synthesize the available evidence for the efficacy and safety of inhaled he

read more