ELENA instrument science and testing: validation with particle beam

Understanding of particle emission processes from the Mercury surface is one of the major objectives of ELENAinstrument in the SERENA experiment on board of the BepiColombo mission. In particular the Ion-Sputteringprocess resulting from charged and energetic particles impacting on the surface can be investigated detectingthe low energetic neutral particles escaping from the planet. The possibility to identify the Ion-Sputtering signaltogether with back-scattered particles and neutrals generated by charge exchange is strictly linked with the newtechnology capability to measure low energetic neutral atoms. This goal can be addressed thanks to a new&oldapproach for the neutral atoms measurement: a well known Time of Flight system enhanced with a new kind ofStart section able to define the start time of the entrance in the ToF path without interacting with the particles anddirectly follow to the Stop detector. The Start section is a shutter composed by two membranes with nanometricslits realized in a large area (1cm2) and oscillating at several frequencies to open and close the entrance of ToFsection. This system is never used before in space mission.The IFSI-INAF Ion beam facility in Rome is devoted to the ELENA testing. The crucial point of the shutteringsystem interaction with particle beam is investigated. The first results demonstrate the good functionality of thiskind of system: capability of the shutter to Open and Close the entrance respect to an ion beam is tested with aMCP stop detector. In this poster we present the IFSI activity in the frame of ELENA science requirement togetherwith the experimental activity devoted to instrument verification

CAESAR: Space Weather archive prototype for ASPIS

The project CAESAR (Comprehensive spAce wEather Studies for the ASPIS prototype Realization) is aimed to tackle all the relevant aspects of Space Weather (SWE) and realize the prototype of the scientific data centre for Space Weather of the Italian Space Agency (ASI) called ASPIS (ASI SPace Weather InfraStructure). This contribution is meant to bring attention upon the first steps in the development of the CAESAR prototype for ASPIS and will focus on the activities of the Node 2000 of CAESAR, the set of Work Packages dedicated to the technical design and implementation of the CAESAR ASPIS archive prototype. The product specifications of the intended resources that will form the archive, functional and system requirements gathered as first steps to seed the design of the prototype infrastructure, and evaluation of existing frameworks, tools and standards, will be presented as well as the status of the project in its initial stage.Comment: 4 pages, 2 figures, ADASS XXXII (2022) Proceeding

Testicolo non palpabile nell’adulto: trattamento laparoscopico

Il criptorchidismo ha un’incidenza variabile fra lo 0,8% e il 2% nella popolazione generale; nel 20% dei casi il testicolo non è palpabile. Questi ultimi casi hanno un aumentato rischio di trasformazione maligna, infertilità e malformazioni epididimali. Il trattamento chirurgico dei testicoli ritenuti non palpabili ha più elevate percentuali di fallimento se paragonato ai casi palpabili. Sono state descritte diverse procedure diagnostiche, di cui la più promettente sembra essere la laparoscopia per la maggiore affidabilità rispetto alle tecniche di imaging nell’individuare la sede del testicolo ritenuto

A rare case of blunt thoracoabdominal trauma with small bowel perforation from airbag

Vehicle collisions represent more than 75% of mechanism of blunt abdominal trauma. In spite of the incomparable improvement of car safety devices, recent studies pointed out that the airbag might cause injuries, specially when it is not associated with seatbelt. In fact, some studies pointed out that crash victims using airbag alone have increased injury severity, hospitalisations, thoracoabdominal procedure, and rehabilitation. Some of the most frequently injured organs reported from airbag deployment are the liver (38%), the spleen (23%) and digestive system (17%). Injury of the hollow viscera are far less common. In particular, blunt abdominal trauma resulting in small bowel perforation is an infrequent lesion. These injuries are difficult to diagnose because specific signs are poor and a delay in treatment increases mortality and morbidity of the patients. We describe a case of thoracoabdominal trauma occurred during a head-on collision after an airbag deployment without seatbelt us

Dalla teledidattica alla realtà virtuale: come cambia la formazione del chirurgo

L’impiego della teledidattica in supporto e non in sostituzione della cosiddetta didattica tradizionale è oggi in corso di valutazione nel mondo accademico internazionale ed italiano. Gli Autori propongono l’impiego della teledidattica anche nella formazione dei Chirurghi e ne illustrano le motivazioni. Il Ministero dell’Università e della Ricerca ha avviato in 11 Facoltà Mediche italiane un Master di secondo livello in Teledidattica applicata alla Medicina sotto il coordinamento della II Facoltà di Medicina e Chirurgia dell’Università degli Studi di Roma “La Sapienza”. Lo scopo del Master è di formare i formatori nell’utilizzo delle metodologie della teledidattica ed in particolare dei sistemi di videoconferenza, grazie ad un offerta formativa proposta in modalità condivisa ed in ambienti multimediali da Esperti nelle Scienze Mediche e Chirurgiche e Ingegneri informatici e delle telecomunicazioni. In particolare la videoconferenza per ciò che attiene l’ambito chirurgico permette il teletutoraggio anche nelle sale operatorie. Il teletutoraggio dei chirurghi in formazione può anche e con successo essere espletato utilizzando percorsi personalizzati elaborati al computer in realtà virtual

The missing link: a nonlinear post-Friedmann framework for small and large scales

We present a nonlinear post-Friedmann framework for structure formation, generalizing to cosmology the weak-field (post-Minkowskian) approximation, unifying the treatment of small and large scales. We consider a universe filled with a pressureless fluid and a cosmological constant \u39b , the theory of gravity is Einstein\u2019s general relativity and the background is the standard flat \u39b CDM cosmological model. We expand the metric and the energy-momentum tensor in powers of 1 / c , keeping the matter density and peculiar velocity as exact fundamental variables. We assume the Poisson gauge, including scalar and tensor modes up to 1 / c 4 order and vector modes up to 1 / c 5 terms. Through a redefinition of the scalar potentials as a resummation of the metric contributions at different orders, we obtain a complete set of nonlinear equations, providing a unified framework to study structure formation from small to superhorizon scales, from the nonlinear Newtonian to the linear relativistic regime. We explicitly show the validity of our scheme in the two limits: at leading order we recover the fully nonlinear equations of Newtonian cosmology; when linearized, our equations become those for scalar and vector modes of first-order relativistic perturbation theory in the Poisson gauge. Tensor modes are nondynamical at the 1 / c 4 order we consider (gravitational waves only appear at higher order): they are purely nonlinear and describe a distortion of the spatial slices determined at this order by a constraint, quadratic in the scalar and vector variables. The main results of our analysis are as follows: (a) at leading order a purely Newtonian nonlinear energy current sources a frame-dragging gravitomagnetic vector potential, and (b) in the leading-order Newtonian regime and in the linear relativistic regime, the two scalar metric potentials are the same, while the nonlinearity of general relativity makes them different. Possible applications of our formalism include the calculations of the vector potential [1,2] and the difference between the two scalar potentials from Newtonian N-body simulations, and the extension of Newtonian approximations used in structure formation studies, to include relativistic effects

Article multitemporal SAR data and 2D hydrodynamic model flood scenario dynamics assessment

The increasing number of floods and the severity of their consequences, which is caused by phenomena, such as climate change and uncontrolled urbanization, create a growing need to develop operational procedures and tools for accurate and timely flood mapping and management. Synthetic Aperture Radar (SAR), with its day, night, and cloud-penetrating capacity, has proven to be a very useful source of information during calibration of hydrodynamic models considered indispensable tools for near real-time flood forecasting and monitoring. The paper begins with the analysis of radar signatures of temporal series of SAR data, by exploiting the short revisit time of the images that are provided by the Cosmo-SkyMed constellation of four satellites, in combination with a Digital Elevation Model for the extraction of flood extent and spatially distributed water depth in a flat area with complex topography during a flood event. These SAR-based hazard maps were then used to perform a bi-dimensional hydraulic model calibration on the November 2010 flood event at the mouth of the Bradano River in Basilicata, Italy. Once the best fit between flood predictions of hydrodynamic models was identified and the efficacy of SAR data in correcting hydrodynamic inconsistencies with regard to reliable assessment of flood extent and water-depth maps was shown by validation with the December 2013 Bradano River event. Based on calibration and validation results, the paper aims to show how the combination of the time series of Synthetic Aperture Radar (SAR) and Digital Elevation Model (DEM) derived water-depth maps with the data from the hydrodynamic model can provide valuable information for flood dynamics monitoring in a flat area with complex topography. Future research should focus on the integration and implementation of the semi-automatic proposed method in an operational system for near real-time flood management

Il lembo di rotazione romboide nel trattamento chirurgico radicale delle fistole sacrococcigee: note di tecnica

Gli Autori descrivono la tecnica plastico/ricostruttiva mediante lembo romboide di rotazione cutaneo/sottocutaneo prefasciale dopo asportazione radicale di fistole sacrococcigee. Tale tecnica, che può essere effettuata in regime di day hospital o di overnight, preferibilmente in anestesia spinale, è di semplice esecuzione e deve comunque essere riservata a lesioni ampie o recidive