1,394 research outputs found
FIRST INDICATION OF SOLAR NEUTRINOS FROM THE CNO CYCLE REACTIONS WITH THE BOREXINO EXPERIMENT
Get PDFSolar neutrinos play a unique and irreplaceable role for the comprehension of the mechanisms powering our star. The study of solar neutrino fluxes allows us to definitely prove that the Sun is powered by thermonuclear reactions occurring in its core. Several questions concerning solar neutrinos are still unsolved. In particular, neutrinos emitted in the CNO cycle of reactions are the only undetected piece of the solar fusion puzzle. This cycle is believed to be the main engine of very massive stars, while it is expected to contribute only ~1% to the solar luminosity. Observing neutrinos from the CNO reactions would have a striking importance in astrophysics, providing the first direct confirmation of the existence of this important energy source in the core of the stars. The Borexino detector is an ultrapure liquid scintillator-based detector located at the Laboratori Nazionali del Gran Sasso. Throughout a more than ten-year long data taking, Borexino has achieved outstanding results about solar neutrino physics, measuring all the neutrino fluxes emitted from the pp-chain nuclear reactions.
This thesis is devoted to the CNO solar neutrino search with Borexino: analyzing the latest three years of data-taking (Phase-III) I provide the first direct experimental indication of a signal of CNO neutrinos. I describe the details of the analysis, the CNO neutrino results and their implications in terms of solar physics
Gestione e trattamento degli odori in Regione Lombardia: indagine su 35 impianti di depurazione delle acque reflue
No full textLe emissioni odorigene generate dagli impianti di depurazione delle acque reflue rappresentano un problema di grande attualità, che i gestori si trovano a dover affrontare senza il supporto di una normativa nazionale che disciplini in materia. A colmare, in parte, questo vuoto, sono venute in soccorso le linee guida di Regione Lombardia e, proprio a 35 impianti ricadenti in quattro aree geografiche del territorio lombardo e appartenenti a diverse classi di potenzialità, si è rivolta l’attenzione degli autori. Attraverso un questionario, infatti, sono state raccolte informazioni sui più diffusi accorgimenti gestionali ed impiantistici messi in atto per ovviare a tale problematica. Per ciascuna sezione, sono state riportate le misure intraprese ed i risultati conseguiti: ne è emerso come le unità maggiormente impattanti siano i pre-trattamenti e la disidratazione e come la tecnologia più diffusamente implementata sia lo scrubber pluristadio, generalmente scelto per un rapporto economicità/prestazioni ritenuto vantaggioso. Al fine, inoltre, di correlare le segnalazioni dei gestori (in merito alla stagionalità ed al momento di occorrenza, durante il giorno, degli episodi di odore) ai parametri associati alla meteo-diffusività dell’atmosfera, è stata effettuata una simulazione modellistica, mediante CALPUFF, utilizzando i dati della stazione meteorologica di Arconate: è risultato che, mentre l’alternanza giorno-notte rappresenta un elemento di fondamentale importanza nella dinamica delle concentrazioni di sostanze odorigene, la stagionalità, invece, non sembra incidere in maniera rilevante sulla stessa. Scopo del presente lavoro è quello di fornire al legislatore uno strumento a sostegno dell’emanazione di specifiche linee guida (basato sullo stato dell’arte esistente in buona parte del territorio lombardo), che possano supportare i gestori nel difficile processo decisionale che deve portare ad una corretta e sostenibile gestione del “problema odori”
OP2C: Towards the Certification of Open Source Product Portals
No full textOpen Source Software (OSS) communities do not often invest in marketing strategies to promote their products in a competitive way. Even the home pages of the web portals of well-known OSS products show technicalities and details that are not relevant for a fast and effective evaluation of the product’s qualities. So, final users and even developers, who are interested in evaluating and potentially adopting an OSS product, are often negatively impressed by the quality perception they have from the web portal of the product and turn to proprietary software solutions or fail to adopt OSS that may be useful in their activities.
In this paper, we define an evaluation model and we derive a checklist that OSS developers and web masters can use to design their web portals with all the contents that are expected to be of interest for OSS final users. We exemplify the use of the model by applying it to the Apache Tomcat web portal and we apply the model to 22 well-known OSS portals
OP2A - Assessing the Quality of the Portal of Open Source Software Products
No full textOpen Source Software (OSS) communities do not often invest in marketing strategies to promote their products in a competitive way. Even the home pages of the web portals of well-known OSS products show technicalities and details that are not relevant for a fast and effective evaluation of the product’s qualities. So, final users and even developers who are interested in evaluating and potentially adopting an OSS product are often negatively impressed by the quality perception they have from the web portal of the product and turn to proprietary software solutions or fail to adopt OSS that may be useful in their activities.
In this paper, we define an evaluation model and we derive a checklist that OSS developers and web masters can use to design their web portals with all the contents that are expected to be of interest for OSS final users. We exemplify the use of the model by applying it to the Apache Tomcat web portal
What microglia depletion approaches tell us about the role of microglia on synaptic function and behavior
Get PDFMicroglia are dynamic cells, constantly surveying their surroundings and interacting with neurons and synapses. Indeed, a wealth of knowledge has revealed a critical role of microglia in modulating synaptic transmission and plasticity in the developing brain. In the past decade, novel pharmacological and genetic strategies have allowed the acute removal of microglia, opening the possibility to explore and understand the role of microglia also in the adult brain. In this review, we summarized and discussed the contribution of microglia depletion strategies to the current understanding of the role of microglia on synaptic function, learning and memory, and behavior both in physiological and pathological conditions. We first described the available microglia depletion methods highlighting their main strengths and weaknesses. We then reviewed the impact of microglia depletion on structural and functional synaptic plasticity. Next, we focused our analysis on the effects of microglia depletion on behavior, including general locomotor activity, sensory perception, motor function, sociability, learning and memory both in healthy animals and animal models of disease. Finally, we integrated the findings from the reviewed studies and discussed the emerging roles of microglia on the maintenance of synaptic function, learning, memory strength and forgetfulness, and the implications of microglia depletion in models of brain disease
Correction to: When terminology hinders research: the colloquialisms of transitions of control in automated driving (Cognition, Technology & Work, (2022), 10.1007/s10111-022-00705-3)
Get PDFIn the original article, author affiliation published with error. The correct affiliations are: Davide Maggi—Institute for Transport Studies, Leeds, UK. Richard Romano—Institute for Transport Studies, Leeds, UK. Oliver Carsten—Institute for Transport Studies, Leeds, UK. Joost C. F. De Winter—Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Delft, The Netherlands. The original article has been corrected.Human-Robot Interactio
Time-lapse Whole-field fluorescence imaging of microglia processes motility in acute mouse hippocampal slices and analysis
Get PDFMicroglia are the resident immune cells of the central nervous system (CNS). In the last year, the improvements in the transgenic mouse technologies and imaging techniques have shed light on microglia functions under physiological conditions. Microglia continuously scan the brain parenchyma with their highly motile processes, maintaining tissue homeostasis and participating in neuronal circuits refinement. Here, we describe a protocol that enables us to perform time-lapse imaging of microglial cells in acute hippocampal slices, making image acquisition possible on an electrophysiology rig equipped with a standard imaging system. Using this ex vivo approach, we investigated microglial processes scanning abilities under physiological condition in hippocampus
Admiel Kosman, Siamo giunti a Dio
Get PDFInternational audienceSix poems from Israeli poet Admiel Kosman translated from the Hebrew into Italian. Selection of poems, presentation of the author, translation and notes by Davide Mano
Admiel Kosman, Siamo giunti a Dio
No full textInternational audienceSix poems from Israeli poet Admiel Kosman translated from the Hebrew into Italian. Selection of poems, presentation of the author, translation and notes by Davide Mano
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