2,933 research outputs found
Modeling and Simulation for Signal and Power Integrity in Mobile Platforms
No full textThis tutorial will cover technological, architectural, modeling and simulation challenges for the Signal and Power Integrity of high-end mobile platforms. On one hand, the latest packaging technologies for mobile applications will be discussed, emphasizing their pros and cons in view of current and expected future system requirements. On the other hand, the architectural challenges will be translated into modeling and simulation challenges, that engineers have to face in their daily work for ensuring system-level signal and power quality. Fast simulation approaches based on reduced-order behavioral models for both interconnects and devices will be discussed in detail. Finally, case studies from real mobile applications will be illustrated
Comunicare la statistica e informare la società
No full textRingrazio Stefano Rolando, l’Istat, ed Enrico Giovannini, che si sono assunti il rischio di farmi aprire un seminario come questo su un argomento complesso ma allo stesso
tempo critico e topico. Parto subito da una considerazione, cioè, dal problema esistente nel rapporto tra statistica e media, e la questione del come comunicare la statistica, a
mio avviso riassumibile in una doppia osservazione. La prima è di tipo professionale, e riguarda gli statistici che sono poco interessati a comunicare i risultati del loro lavoro. La secondo riguarda i media e i professionisti tavola rotonda della comunicazione, che usano in maniera massiccia i dati statistici, ma sono poco interessati al loro fondamento reale, ossia al significato vero di quei dati. Quindi, da una parte, abbiamo i professionisti della statistica che sono abbastanza disinteressati ai media, e dall’altra i professionisti dei media che presentano le statistiche, ma sono privi di interesse nei confronti degli statistici
Anisotropic mesh adaptation for the generalized Ambrosio-Tortorelli functional with application to brittle fracture
No full textQuasi-static crack propagation in brittle materials is modeled via the Ambrosio–Tortorelli approximation. The crack is modeled by a smooth phase-field, defined on the whole computational domain. Since the crack is confined to a thin layer, the employment of anisotropic adapted grids is shown to be a really effective tool in containing computational costs. We extend the anisotropic error analysis, applied to the classical Ambrosio–Tortorelli approximation by Artina et al., to the generalized Ambrosio–Tortorelli functional, where a unified framework for several elasticity laws is dealt with as well as a non-convex fracture energy can be accommodated. After deriving an anisotropic a posteriori error estimator, we devise an algorithm which alternates optimization and mesh adaptation. Both anti-plane and plane-strain configurations are numerically checked
Who is the author of the 1876 Stefano manuscript?
No full textFor over one hundred years the Stefano manuscript was a private document in the possession of the Baccich family and descendants. It told a story of the 1875 Stefano shipwreck as narrated by the shipwreck survivor and the founding family patriarch Miho Baccich. In these circumstances the question of authorship of the manuscript was immaterial and did not arise as an issue. However, with the publication of the manuscript the author‟s name, or names, need to be formally attributed to it. It turns out that this is not such a clear-cut matter.
As we shall see, all informed sources attributed the authorship, and the ownership, of the manuscript to Miho Baccich. But the manuscript itself was written by Canon Stjepan Skurla – a priest from Miho‟s hometown of Dubrovnik. The question then arises: should Skurla also be considered as an author of the manuscript, or, even as the sole author (as some would have it)
A System for Prevention, Care and Rehabilitation of Subject with Cardiovascular Risk: the Signal Processing Algorithm Library
No full textIn the last years the Home Monitoring development is increased both for its capability as a real time tool to manage patients health and to reduce hospitalization costs. The Home Monitoring system is a complex structure that needs the collaboration of different disciplines, from medicine to engineering, and technologies. This project has been developed with the integration of different groups of research as to unify all the necessary knowledge. According to physician exigencies a signal processing library has been implemented to describe in a synthetic and effective way the pathological status of patients with moderate cardiovascular risk. Consequently a software and hardware architecture have been designed to acquire ECG signal, to extract HRV and respiratory information through a multiparametric approach and to store the results. This Home Monitoring system has been projected to work during an appropriate physical training section and its function is both diagnostic and therapeutic as well as for rehabilitation. The aim of this work is to describe the structure of the signal processing library
Fashion Culture: Power In Fashion with Stefano Tonchi and Grazia d'Annunzio
No full textStefano Tonchi, global chief creative officer for L’Officiel Group, and Grazia d’Annunzio, former deputy director of Vogue Italia, discuss the power of military uniforms and their influence on high fashion. Tonchi is co-author of the book "Uniform: Order and Disorder.
Variability of black carbon and ultrafine particle concentration on urban bike routes in a mid-sized city in the Po valley (Northern Italy)
No full textCyclists might experience increased air pollution exposure, due to the proximity to traffic, and higher intake, due to their active travel mode and higher ventilation. Several local factors, like meteorology, road and traffic features, and bike lanes features, affect cyclists’ exposure to traffic-related pollutants. This paper investigates the concentration levels and the effect of the features of the bike lanes on cyclists’ exposure to airborne ultrafine particulate matter (UFP) and black carbon (BC) in the mid-sized city of Piacenza, located in the middle of the Po Valley, Northern Italy. Monitoring campaigns were performed by means of portable instruments along different urban bike routes with bike lanes, characterized by different distances from the traffic source (on-road cycle lane, separated cycle lane, green cycle path), during morning (9:00 am–10:00 am) and evening (17:30 pm–18:30 pm) workday rush hours in both cold and warm seasons. The proximity to traffic significantly affected cyclists’ exposure to UFP and BC: exposure concentrations measured for the separated lane and for the green path were 1–2 times and 2–4 times lower than for the on-road lane. Concurrent measurements showed that exposure concentrations to PM10, PM2.5, and PM1 were not influenced by traffic proximity, without any significant variation between on-road cycle lane, separated lane, or green cycle path. Thus, for the location of this study PM mass-based metrics were not able to capture local scale concentration gradients in the urban area as a consequence of the rather high urban and regional background that hides the contribution of local scale sources, such as road traffic. The impact of route choice on cyclists’ exposure to UFPs and BC during commuting trips back and forth from a residential area to the train station has been also estimated through a probabilistic approach through an iterative Monte Carlo technique, based on the measured data. Compared to the best choice, a worst-route choice can result in an increased cumulative exposure up to about 50% for UFPs, without any relevant difference between cold and warm season, and from 20% in the cold season up to 90% in the warm season for equivalent black carbon concentration (EBC)
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