A Simple Modelling Tool for Fast Combined Simulation of Interconnections, Inter-Symbol Interference and Equalization in High-Speed Serial Interfaces for Chip-to-Chip Communications

We describe an effcient system-level simulator that, starting from the architecture of a well-specified transmissive medium (a channel modelled as single-ended or coupled differential microstrips plus cables) and including the system-level characteristics of transmitter and receiver (voltage swing, impedance, etc.), computes the eye diagram and the bit-error rate that is obtained in high-speed serial interfaces. Various equalization techniques are included, such as feed-forward equalization at the transmitter, continuous-time linear equalization and decision-feedback equalization at the receiver. The impact of clock and data jitter on the overall system performance can easily be taken into account and fully-adaptive equalization can be simulated without increasing the computational burden or the model\u2019s complexity

Graphene-based Wireless Agile Interconnects for Massive Heterogeneous Multi-chip Processors

The main design principles in computer architecture have recently shifted from a monolithic scaling-driven approach to the development of heterogeneous architectures that tightly co-integrate multiple specialized processor and memory chiplets. In such data-hungry multi-chip architectures, current Networks-in-Package (NiPs) may not be enough to cater to their heterogeneous and fast-changing communication demands. This position paper makes the case for wireless in-package nanonetworking as the enabler of efficient and versatile wired-wireless interconnect fabrics for massive heterogeneous processors. To that end, the use of graphene-based antennas and transceivers with unique frequency-beam reconfigurability in the terahertz band is proposed. The feasibility of such a nanonetworking vision and the main research challenges towards its realization are analyzed from the technological, communications, and computer architecture perspectives.Comment: 8 pages, 4 figures, 1 table - Accepted at IEEE Wireless Communications Magazin

Observation of the Gamma-Ray Binary HESS J0632+057 with the H.E.S.S., MAGIC, and VERITAS Telescopes

The results of gamma-ray observations of the binary system HESS J0632 + 057 collected during 450 hr over 15 yr, between 2004 and 2019, are presented. Data taken with the atmospheric Cherenkov telescopes H.E.S.S., MAGIC, and VERITAS at energies above 350 GeV were used together with observations at X-ray energies obtained with Swift-XRT, Chandra, XMM-Newton, NuSTAR, and Suzaku. Some of these observations were accompanied by measurements of the Hα emission line. A significant detection of the modulation of the very high-energy gamma-ray fluxes with a period of 316.7 4.4 days is reported, consistent with the period of 317.3 0.7 days obtained with a refined analysis of X-ray data. The analysis of data from four orbital cycles with dense observational coverage reveals short-timescale variability, with flux-decay timescales of less than 20 days at very high energies. Flux variations observed over a timescale of several years indicate orbit-to-orbit variability. The analysis confirms the previously reported correlation of X-ray and gamma-ray emission from the system at very high significance, but cannot find any correlation of optical Hα parameters with fluxes at X-ray or gamma-ray energies in simultaneous observations. The key finding is that the emission of HESS J0632 + 057 in the X-ray and gamma-ray energy bands is highly variable on different timescales. The ratio of gamma-ray to X-ray flux shows the equality or even dominance of the gamma-ray energy range. This wealth of new data is interpreted taking into account the insufficient knowledge of the ephemeris of the system, and discussed in the context of results reported on other gamma-ray binary systems

MAGIC and H.E.S.S. detect VHE gamma rays from the blazar OT081 for the first time: a deep multiwavelength study

https://pos.sissa.it/395/815/pdfPublished versio

Gig Economy in Europe

This report wishes to explore the dimension, quality and characteristics of Gig Economy in a comparative way. Platform capitalism represents the most appropriate form to interpret the ongoing capitalistic transformations. But the modalities to analyze this phenomenon and the normative efforts appear as still very much contaminated by the prevalent narratives among public opinion. This comparative analysis looks at the main studies carried out at a European and national level on the quality and diffusion of platform economies, in an attempt to go beyond mainstream narratives, and therefore offer a new angle for policy actions. This study is divided transversally by topic (definitions and terminology, occupational comparison, working conditions) and five chapters are dedicated to different platform typologies:Cloudwork as a growing modality for “offline” companies to outsource work and divide work globally;Food delivery, and a gallery on the main existing platforms, followed by an analysis and evaluation of future trends and evolutions in the sector;Domestic work and a European comparison proposing a report on the main platform and a study on growth trends;Digital tourism, to understand the impact on the sector and potential future scenarios.Lastly, the report closes with an analysis on the interaction between Gig Economy and industrial relations, trying to investigate the theoretical underpinnings and the experimentations adopted in the Eu28. Facing a lack of coherent legislation on the platform system, collective bargaining has moved towards the proposal of benchmark standards and the safeguard of working conditions of digital workers. Even though these are still not widespread, there are contractual experimentations dedicated to platform workers going on in various countries (Italy, Spain, Sweden, Denmark, Switzerland) which try to surpass the hurdle represented by the juridical employment status (autonomous or subordinate) which has often created problems for lawmakers

Tendenze delle relazioni industriali nel settore suinicolo: il caso italiano in un quadro europeo

Il saggio analizza alcune tendenze in atto nelle relazioni industriali del settore suinicolo europeo. Nonostante sia ancora relativamente poco esplorato dalla letteratura giuslavoristica e di relazioni industriali, il settore della carne suina rappresenta un osservatorio privilegiato per comprendere le profonde trasformazioni che stanno investendo in questi anni l\u2019economia, il mercato del lavoro e i sistemi di relazioni industriali. Il saggio si sofferma su alcuni fattori che hanno favorito l\u2019apertura internazionale del mercato della carne e incrementato la pressione competitiva sulle industrie nazionali e su alcune criticit\ue0 che hanno interessato i sistemi di relazioni industriali in Europa (in particolare, negli esempi del caso belga e del caso danese), per poi concentrare l\u2019attenzione sul caso italiano, illustrando le caratteristiche strutturali della filiera e le maggiori criticit\ue0 che stanno emergendo nelle relazioni industriali

Meat-up ffire. Dentro le relazioni industriali: il caso della filiera della carne in Europa

Gli autori presentano brevemente il progetto Meat Up Ffire mettendo in evidenza gli aspetti salienti della ricerca, vale a dire le caratteristiche strutturali, l’occupazione, i rapporti di lavoro e le relazioni industriali nella filiera di produzione della carne europe

Meat-up ffire. Dentro le relazioni industriali: il caso della filiera della carne in Europa

none5nononeStefania Battistelli, Piera Campanella, Davide Dazzi, Giulio Centamore, Daniela FreddiBattistelli, Stefania; Campanella, Piera; Dazzi, Davide; Centamore, Giulio; Freddi, Daniel