2,418 research outputs found
Comment on the paper by Y.Komura and Y.Okabe [arXiv:1011.3321]
We point out that the claim of strong universality in the paper J.Phys. A 44,
015002, arXiv:1011.3321 is incorrect, as it contradicts known rigorous results.Comment: submitted to J.Phys.
The SPHERE infrared survey for exoplanets (SHINE) I:Sample definition and target characterization
Frame Combination Techniques for Ultra High-Contrast Imaging
We summarize here an experimental frame combination pipeline we developed for
ultra high-contrast imaging with systems like the upcoming VLT SPHERE
instrument. The pipeline combines strategies from the Drizzle technique, the
Spitzer IRACproc package, and homegrown codes, to combine image sets that may
include a rotating field of view and arbitrary shifts between frames. The
pipeline is meant to be robust at dealing with data that may contain non-ideal
effects like sub-pixel pointing errors, missing data points, non-symmetrical
noise sources, arbitrary geometric distortions, and rapidly changing point
spread functions. We summarize in this document individual steps and
strategies, as well as results from preliminary tests and simulations.Comment: 9 pages, 4 figures, SPIE conference pape
Ultra-light disposable radio probes for atmospheric monitoring
Representation of clouds remains a latent ambiguity for weather forecasting and climate models since their characteristics depends on multidisciplinary processes in a wide range of natural scales, from the collision of micron-sized droplets and particles to the thousand-of-meters scale of airflow dynamics.
Within the Horizon 2020 Innovative Training Network Cloud-MicroPhysics-Turbulence-Telemetry (ITN-COMPLETE), the development of ultra-small light disposable radio probes for fluctuation-inside-cloudsmonitoring is promoted and financed. Being light-weighted (less than 20 grams), the probes will have a fluid-dynamic behavior to allow them to “float” inside warm clouds after been released by an aircraft or an Unmanned Aerial Vehicle (UAV).
Each disposable probe is equipped with compact size microprocessors (presently the first prototype uses Arduino© Nano), controllers and a set of sensors for the measurement of atmospheric parameters such as velocity, acceleration, pressure, temperature and humidity variations.
All probes are part of the Internet-of-Things (IoT) world. In fact, while floating, they collect, store and then send the coded information to a base station located at the ground through a dedicated radio transmission link. It is to be noted that long-range communication link (10 km) should be assured with low power consumption technology: a network based on the Long Range Wide Area Network (LoRaWAN© protocol) to connect and exchange data within the end-modules and the base station is the potential adopted solution.
As far as possible biocompatible elements within the mini ultra-light radio probes will be used to avoid any environmental pollution
Architecture of Computing Systems - ARCS 2011
Architecture of Computing Systems - ARCS 2011,
24th International Conference, Como, Italy, February 24-25, 2011. Proceeding
Abundância de oligoquetas terrestres em áreas de floresta Ombrófila Mista e plantação de Araucaria angustifolia, utilizando dois métodos de coleta.
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