Tools for searching resonant moving groups in Galactic disc simulationsS. T. Garcia Roca, M. Romero-Gómez, T. Antoja et al.|Data Archiving and Networked Services (DANS)|2011 One of the most plausible explanations for the origin of the moving groups is the orbital and resonant regions related to the large scale structure (bar and spiral arms) of the Milky Way (Antoja 2010). This study has been up to now restricted to the solar radius. Here we propose to investigate the origin and evolution of these structures through the analysis of the velocity distribution in the full Galactic plane, discussing the link between the kinematic substructures, overdensities (bar and spiral) and resonant regions. To facilitate the analysis of the density function (DF) on the phase space of the simulated Galactic discs, we are implementing statistical tools like EM-WEKA and FoF clustering algorithms, and moments of the distribution function (vertex deviation and third order moments).
Low-cost Oceanographic Buoy for Evaluating the Mechanical Resistance of a Water Cherenkov Detector to be deployed on a high-altitude Natural Lake in Peru.The SWGO Collaboration is evaluating the possibility of deploying Water Cherenkov Detectors (WCD) in a high-altitude natural lake. For that, the first challenge is to build a bladder strong enough that could be used as a WCD inside a natural lake. A prototype bladder has been designed for SWGO and two bladders, made of different films, have been deployed for testing at Sibinacocha lake, in Peru, at 5000 masl. In order to monitor the wave intensity in the lake, a low-cost oceanographic buoy was developed using an acceleration sensor MPU6050 and a liquid sensor DS18B20. The development platform used was the Arduino Mega 2560 with some out-of-the shelf modules to achieve a functional and autonomous prototype. A code was developed in Python to process the data and convert the acceleration values into position, allowing estimation of height variations, as a function of time, less than 1 cm. To reduce the environmental impact of the floating structure, the use of metallic materials was minimized and mostly wood, cotton, and PVC pipes were used. This buoy has been installed next to SWGO prototype bladders at the Sibinacocha lake in Peru. In this contribution we will present the details of a low-cost oceanographic buoy built to monitor lake wave intensity.