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Pixel chamber: A solid-state bubble chamber for imaging of charm and beauty
No full textThe Pixel Chamber project proposes to realize the first “solid-state bubble chamber” detector for measurements of charm and beauty. It is conceived as a stack of hundreds of thin and granular monolithic pixel sensors which provide a 3D image of all of the particles produced in proton-silicon interactions occurring inside the detector volume. In this paper we will discuss the high-precision tracking and vertexing performances, showing that the vertex resolution can be up to one order of magnitude better than state-of-the-art detectors like the LHCb one
Study of a novel VUV-imaging system in liquid argon for neutrino oscillation experiments
No full textDUNE, a dual site long-baseline neutrino experiment, currently being built, will aim to measure some of the still unknown neutrino oscillation parameters. The near site will be composed by three detectors. One of them, the SAND detector, will include a liquid argon volume instrumented with an innovative detection technique. In this paper the first results obtained with a prototype are presented
Simulation and tests of HEPD-02 scintillator prototypes
No full textThe High-Energy Particle Detector (HEPD-02) on board of the China Seismo-Electromagnetic Satellite (CSES-02) is a second-generation particle detector aimed to measure particle precipitation due to short-time perturbations
in the radiation belts caused by solar and terrestrial phenomena. It consists of two trigger planes one above and the other below the tracker module and a range calorimeter surrounded by a veto system. HEPD-02 should be able to measure particle flux and energy spectrum in a wide range of energies. In this paper simulations and tests of HEPD-02 trigger paddle prototypes are discussed
Characterization of plastic scintillator detector prototypes for the HERD experiment
No full textSatellite experiments employ plastic scintillators to discriminate charged from neutral particles in order to correctly identify gamma rays and to identify charged nuclei. We have assembled and tested different prototypes of plastic scintillators equipped with Silicon Photomultipliers (SiPMs) to study different designs for the SiPM-based readout system. Our studies are performed in the framework of the High-Energy Cosmic Radiation Detection (HERD) facility that will be installed onboard the future Chinese space station. The HERD experiment will provide high-quality data on charged cosmic rays up to PeV energies and gamma rays up to TeV energies
Statistical correlation analysis of strong earthquakes and ionospheric electron density anomalies as observed by CSES-01
No full textIn this work, we preliminary analyse ionospheric electron density as observed by the first China Seismo-Electromagnetic Satellite (CSES-01) from April 2018 to July 2019, defining an anomaly along each track objectively. We then apply a worldwide statistical correlation in space and time of these anomalies with
respect to M5.5+ shallow earthquakes (USGS source) occurred in the same period. Although the data are short and cover discontinuously the period of concern, in
general, the preliminary results seem to confirm those obtained with an analogous analysis on the Swarm satellite data recently published in De Santis A. et al., Sci. Rep., 9, (2019) 20287
Time domain NIRS sensitivity to neonatal brain haemodynamics
No full textImpairment of cerebral autoregulation and haemodynamics is an important cause of morbidity and mortality in neonates, making a continuous monitoring of brain health extremely important in Neonatal Intensive Care Unit. Time Domain NIRS (TD-NIRS) is an advantageous technique for non-invasively continuous monitoring of brain hemoglobin concentration at bed side. However, NIRS measurements are influenced by superficial tissues (i.e., scalp, skull and cerebrospinal fluid) and head geometry, which could affect the estimation of brain haemodynamic parameters. In this work we evaluated the accuracy of TD-NIRS in estimating
neonatal cerebral haemodynamics through Monte Carlo simulations. In particular, we simulated photon propagation inside two realistic meshes of preterm (29 weeks post-menstrual age (PMA)), and term (44 weeks PMA) neonates’ head. The obtained results were analyzed with semi-infinite and spherical homogeneous model for photon migration, and showed an underestimation of hemoglobin concentration, and good accuracy for brain saturation, empowering the ability of TD-NIRS technique in estimating brain tissue saturation
Analisi di rete nell’abbandono studentesco tra il primo e il secondo anno: il caso dell’Università degli studi di Palermo
Get PDFObiettivo di questa tesi è l’analisi del fenomeno dell’abbandono universitario nel passaggio tra il primo e il secondo anno attraverso l’applicazione dell’analisi di rete e la definizione di azioni incentrate nel percorso del secondo semestre atte a diminuirne l’intensità
Archeologia virtuale del passato contemporaneo. Dal rilievo alla ricostruzione digitale del campo PG 65 di Altamura (BA)
Get PDFIn the last decades, archaeologists have learnt to overcome the chronological limits, arriving to conceive the application of archaeological methods to contemporary objects and sites. But what happens when we try to apply the rules and methods of virtual archaeology to a context of the contemporary past? While the same tools can be used, some very important differences warn us to be careful: sometimes the contemporary archaeological heritage cannot be reconstructed in the usual way, despite the huge amount of data and sources available. The example of the virtual reconstruction of POW no. 65 in Central Apulia gives some elements to envisage possible applications of computer graphics techniques to very recent cultural heritage assets, moving a step forward towards a new paradigm of digital presentation of archaeological heritage
Principi e metodi dell’archeologia ricostruttiva. Dall’approccio filologico alla ricostruzione tipologica
Get PDFIn a virtual archaeology project, a full transparency in methods, techniques and documentation is necessary in order to define quality standards that are crucial for a discipline that promises to inform, amaze and fascinate with increasing effectiveness and accuracy. However, documentation is often insufficient to guarantee a level of reliability. Comparisons, deductions and methods that allow experts to retrace the reconstructive process in all its parts are always needed. Based on the results of a case study carried out on the Monte Sannace site, several methods are described in order to evaluate the level of reliability of the 3D reconstruction. This process is related to qualitative factors not always easy to weigh up, but highly important in compliance with Principle no. 7 of the Seville Charter: transparency of information and specification of the methods applied. From a theoretical point of view, analogies and differences in modern restoration methods are analysed, and the results are described in relation to the communicative and emotional objectives of the project. The reconstruction of the Monte Sannace site represents a significant step towards the full appreciation of a little-known area with important archaeological and naturalistic features
Dal digitale al materiale: design e tecnologie digitali per la creazione di kit esperienziali per il Museo Archeologico Nazionale di Napoli
Get PDFThe aim of this paper is to explore the interaction between design and archaeology in building Museum engagement experiences. In particular, a case study from the Museo Archeologico Nazionale di Napoli (MANN) will be presented. This study was carried out as part of OBVIA - Out Of Boundaries Viral Art Dissemination, a joint public engagement project sponsored by the Museum and partners such as the Università degli Studi di Napoli ‘Federico II’ and the Università degli Studi della Campania ‘Luigi Vanvitelli’. The target of the project was to stimulate innovative communication and promotion actions. Specific research activities carried out by the Dipartimento di Architettura e Disegno Industriale dell’Università degli Studi della Campania ‘Luigi Vanvitelli’, were dedicated to the development of Experience Design strategies for museum engagement and audience development. This study resulted in the creation of kits to be used during hands-on laboratories for children. The kit ‘Museum Details’ focused on the observation and reproduction of details of archaeological artifacts exhibited in the Museum. These kits included a map, instruments for detailed observation, moulding clay and casts to create 3D reproductions of original archaeological details. The necessity of a high detailed reproduction of small features of archaeological findings was an opportunity to experiment with the acquisition of accurate 3D models. In particular, the work carried out by Mnemosyne3D focused on five findings from the Magna Graecia collection. The main challenge was to detect sub-millimetric details on a reflecting surface. Photogrammetry was chosen as method for 3D scanning, a structure from motion acquisition technique. The post processing, through 3D sculpting and CAD 3D software, aimed to enhance the features of the models in order to make them suitable for casting and plastic reproductions