Comparing Simultaneous Stratospheric Aerosol and Ozone Lidar Measurements with SAGE 2 Data after the Mount Pinatubo Eruption

Stratospheric aerosol and ozone profiles obtained simultaneously from the lidar station at the University of L'Aquila (42.35 deg N, 13.33 deg E, 683 m above sea level) during the first 6 months following the eruption of Mount Pinatubo are compared with corresponding nearby Stratospheric Aerosol and Gas Experiment (SAGE) 2 profiles. The agreement between the two data sets is found to be reasonably good. The temporal change of aerosol profiles obtained by both techniques showed the intrusion and growth of Pinatubo aerosols. In addition, ozone concentration profiles derived from an empirical time-series model based on SAGE 2 ozone data obtained before the Pinatubo eruption are compared with measured profiles. Good agreement is shown in the 1991 profiles, but ozone concentrations measured in January 1992 were reduced relative to time-series model estimates. Possible reasons for the differences between measured and model-based ozone profiles are discussed

Wall and ceiling climbing quadruped robot with superior water repellency manufactured using 3D printing (UNIclimb)

Gecko lizards have superior locomotive capabilities to walk on ceilings and walls of varying angles. Furthermore, their skin has superior water-repellency due to hierarchical hairy structures on it. With these remarkable capabilities, their wide range of locomotion is effective even in rainy and wet environments, leading to enhanced survival capabilities. Current wall climbing robots have limited abilities in locomotion and surface functionalities compared to gecko lizards. In this paper, we present a gecko-inspired quadruped robot that can walk on ceilings and varying angled walls. Furthermore, the surface of the robot is coated with nanoparticles, enabling superior water repellency, similar to the gecko lizard. The quadruped robot is manufactured using a 3D printing technique with minimal materials in a rapid, facile, and environment-friendly manner