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Creating a Docker Environment for Jupyter Notebook-Based Machine Learning Projects
Get PDFThis project proposes the configuration of a locally optimized development environment for Artifi-
cial Intelligence projects, leveraging containers and Jupyter notebooks. While services like Google
Colab offer quick and convenient access to pre-configured cloud resources for machine learning,
subscription costs and resource limitations may be restrictive for some projects. To overcome
these challenges, the creation of a locally executable environment similar to Colab is suggested,
but deployable on-premise on a local server. This approach allows for full hardware customization,
including GPU selection, and eliminates subscription cost constraints. In the following chapters,
the necessary steps to configure this local environment will be outlined, starting from hardware
selection and proceeding with the installation of required dependencies and environment setup.
By following these guidelines, users will be able to establish a local machine learning develop-
ment environment that provides greater control and flexibility, while retaining the convenience
and familiarity associated with Google Colab
Development and testing of the MicroMED sensor: From BreadBoard model to flight model
Get PDFSuspended dust plays a critical role in regulating the Martian climate by influencing the atmospheric thermal gradient, altering the
amount of infrared and visible energy absorbed and scattered by the atmosphere, and acting as condensation nuclei for CO2 iceclouds
particles. There are many well demonstrated, dust-related effects on martian climate which depend on dustsize, concentration,
chemical and bulk composition. Currently, an accurate estimation of these parameters is lacking as they are derived from indirect measurement
of the optical depth acquired from the surface and orbital data. These indirect measurements require a priori assumptions on
the grain distribution curve and are hence subject to possible biases. To overcome these limitations, an optical particles counter called
MicroMED has been developed under the National Institute of Astrophysics (INAF) leadership. MicroMED can measure the sizes of
individual dust grains in a specific volume of air thus providing the grain size distribution and concentration. MicroMED has been
selected to join the Dust Complex payload on board the ExoMars 2022. The Flight Model of the instrument has been developed and
optimized starting from two prototype BreadBoard versions. Here we present the sub-systems that constitute MicroMED and their testing
and characterization process, performed using the Breadboard models. We discuss the optimizations and improvements introduced
on the basis of the prototype results and the overall performances of the final design
Il Museo Astronomico di Brera e il suo pubblico. Report 2022/23
Get PDFIl Museo Astronomico di Brera - MusAB, Museo dell’Istituto Nazionale di Astrofisica, nasce nel 2015 come collezione museale riconosciuta dalla Regione Lombardia. Il MusAB è una straordinaria raccolta di strumenti utilizzati dal personale dell’Osservatorio Astronomico di Brera nel corso di 250 anni di storia.
Si tratta di una realtà molto particolare che intreccia la storia alla scienza, una realtà poco conosciuta sul suolo cittadino nonostante i fitti legami dell’Osservatorio Astronomico con il territorio, sviluppati a partire dal 1760 circa.
Il MusAB è destinato a rimanere un museo frequentato da una ristretta parte della popolazione? Noi crediamo di no.
Dal 2020 la galleria espositiva è stata rinnovata, così come le modalità di visita disponibili per il pubblico. Le attività divulgative del museo qui presentate sono state gestite dal personale dell’INAF-Osservatorio Astronomico di Brera e sono state costruite per ampliare il pubblico del MusAB - reale e potenziale - cercando di intercettarne l’interesse e le istanze. L'obiettivo è restituire alla cittadinanza l’enorme bagaglio culturale che l’INAF-Osservatorio Astronomico di Brera porta con sé.
Per farlo nel migliore dei modi è necessario conoscere il pubblico e domandarsi se le strategie fino ad ora utilizzate stiano funzionando.
In questo articolo viene analizzata la risposta del pubblico alla nuova esposizione e alle esperienze di visita messe in campo da marzo 2022 a giugno 2023.
L’analisi si basa su 166 questionari compilati dal pubblico del MusAB a seguito delle visite
The 2024 Great American Eclipse: first report on the observational campaign
Get PDFThis is a short report on the observational campaign that has been performed during the total solar eclipse of April 8th, 2024 in U.S. After a short description of the eclipse properties, this report briefly describes the observation site, the instrumentation, and then lists and shows some of the exposures that have been acquired during the totality
Pubblicare su Monthly Notices of the Royal Astronomical Society
Get PDFMonthly Notices of the Royal Astronomical Society (MNRAS) è una delle riviste più prestigiose, a livello internazionale, nel campo della ricerca astronomica e astrofisica. A partire da gennaio 2024 tutte le riviste pubblicate dalla Società sono diventate ad accesso aperto (OA). Quest’azione ha creato grande preoccupazione all’interno della comunità scientifica dell’Ente, dovuta anche all’introduzione dell’ Article Processing Charge per la pubblicazione degli articoli. Parallelamente è in fase di negoziazione, da parte di CARE-CRUI, il nuovo contratto con l’editore Oxford University Press. In questa fase si è ritenuto quindi necessario capire quale impatto potrebbe avere il cambiamento imposto dalla RAS, dando anche spunti utili alla parte negoziale (in questo caso alla CRUI) per la trattativa in corso. INAF, avendo un alto numero di pubblicazioni, di corresponding author e di accessi in lettura, costituisce un punto di forza importante nella negoziazione
Unveiling the internal structure and formation history of the three planets transiting HIP 29442 (TOI-469) with CHEOPS
Get PDFMultiplanetary systems spanning the radius valley are ideal testing grounds for exploring the different proposed explanations for the observed bimodality in the radius distribution of close-in exoplanets. One such system is HIP 29442 (TOI-469), an evolved K0V star hosting two super-Earths and one sub-Neptune. We observed HIP 29442 with CHEOPS for a total of 9.6 days, which we modelled jointly with two sectors of TESS data to derive planetary radii of 3.410 ± 0.046, 1.551 ± 0.045, and 1.538 ± 0.049 R? for planets b, c, and d, which orbit HIP 29442 with periods of 13.6, 3.5, and 6.4 days, respectively. For planet d this value deviates by more than 3s from the median value reported in the discovery paper, leading us to conclude that caution is required when using TESS photometry to determine the radii of small planets with low per-transit signal-to-noise ratios and large gaps between observations. Given the high precision of these new radii, combining them with published RVs from ESPRESSO and HIRES provides us with ideal conditions to investigate the internal structure and formation pathways of the planets in the system. We introduced the publicly available code plaNETic, a fast and robust neural network-based Bayesian internal structure modelling framework. We then applied hydrodynamic models to explore the upper atmospheric properties of these inferred structures. Finally, we identified planetary system analogues in a synthetic population generated with the Bern model for planet formation and evolution. Based on this analysis, we find that the planets likely formed on opposing sides of the water iceline from a protoplanetary disk with an intermediate solid mass. We finally report that the observed parameters of the HIP 29442 system are compatible with a scenario where the second peak in the bimodal radius distribution corresponds to sub-Neptunes with a pure H/He envelope and with a scenario with water-rich sub-Neptunes
Report della Notte dei Ricercatori e delle Ricercatrici 2024 in IAPS
Get PDFIn occasione della Notte Europea dei Ricercatori e delle Ricercatrici del 2024, l'Istituto di Astrofisica e Planetologia Spaziali ha riaperto al pubblico. Questo report descrive le attività svolte, presentando gli obiettivi raggiunti durante l'evento e analizzando le criticità riscontrate
Bio-Engineering Yeast Cells Biolenses by Reshaping Intracellular Vacuoles
No full textAn intriguing field of research has recently emerged in which biological cells can be demonstrated to behave as photonics devices, such as optical microlenses. This research highlights yeast cells as promising candidates for engineering biolenses with customizable focal properties. Typically serving as positive biolenses due to their quasi-spherical shape and positive refractive index (RI) contrast, yeast cells can achieve a negative lensing effect by manipulating their intracellular content, without altering their overall morphology. In fact, it shows that exposure to hypotonic conditions induces the formation of a large, roundish vacuole with lower RI values with respect to the surrounding cytoplasm, thus altering the cell's optical properties. This behavior is investigated by using 3D RI tomograms obtained through a holo-tomographic phase imaging flow cytometry system, demonstrating that the anisotropic nature of yeast cells results in focal properties dependent on their specific orientations in respect to the incident light. Furthermore, Zemax OpticStudio is utilized to perform comprehensive assessments for optical design analysis of the obtained cell biolenses. The methods described here and the related results represent a pioneering investigation of biological cells’ metamorphoses via intracellular content manipulation for biolens applications
Calibration of the JIG v1.2 for the SKA-TPM-ADU v1.6
Get PDFThe document describes how the JIG for SKA TPM ADU (Square Kilometer Array, Tile Processing Module, Analog to Digital Unit) board was calibrated and shows the results