The Quantum Algebraic Structure of the Twisted XXZ Chain

We consider the Quantum Inverse Scattering Method with a new R-matrix depending on two parameters $q$ and $t$. We find that the underlying algebraic structure is the two-parameter deformed algebra $SU_{q,t}(2)$ enlarged by introducing an element belonging to the centre. The corresponding Hamiltonian describes the spin-1/2 XXZ model with twisted periodic boundary conditions.Comment: LateX file, 9 pages, Minor changes (including authors` names in the hep-th heading

A Power-Efficient Methodology for Mapping Applications on Multi-Processor System-on-Chip Architectures

This work introduces an application mapping methodology and case study for multi-processor on-chip architectures. Starting from the description of an application in standard sequential code (e.g. in C), first the application is profiled, parallelized when possible, then its components are moved to hardware implementation when necessary to satisfy performance and power constraints. After mapping, with the use of hardware objects to handle concurrency, the application power consumption can be further optimized by a task-based scheduler for the remaining software part, without the need for operating system support. The key contributions of this work are: a methodology for high-level hardware/software partitioning that allows the designer to use the same code for both hardware and software models for simulation, providing nevertheless preliminary estimations for timing and power consumption; and a task-based scheduling algorithm that does not require operating system support. The methodology has been applied to the co-exploration of an industrial case study: an MPEG4 VGA real-time encoder

Use of balloon catheter dilation vs. traditional endoscopic sinus surgery in management of light and severe chronic rhinosinusitis of the frontal sinus: a multicenter prospective randomized study

OBJECTIVE: Chronic rhinosinusitis (CRS) of the frontal sinus is a complex pathological condition and many surgical techniques were described to treat this area endoscopically, like traditional endoscopic sinus surgery (ESS) and balloon catheter dilation (BCD). PATIENTS AND METHODS: We designed a multicenter prospective randomized study to assess the validity and safety of BCD vs. ESS in symptomatological chronic rhinosinusitis of the frontal sinus enrolling a population of 102 adult patients (64 men and 38 women; overall 148 frontal sinuses studied) with non-polypoid CRS. For a better evaluation of the disease, in our study we decided to analyze both radiological (Lund-McKay CT scoring modified by Zinreich) and symptomatological results (SNOT-20 questionnaire). We divided the population affected in two groups, one with light/mild frontal CRS and the other with moderate/severe frontal CRS, basing on radiological findings at Lund-MacKay modified by Zinreich score. Every group was divided in two subgroups, in one we used BCD and in the other we used traditional ESS. RESULTS: The current literature does not support the suggestion that indications for BCD and ESS are identical, and additional research is needed to determine the role for BCD in specific patient populations. The results showed a not statistically significative difference between BCD and conventional ESS of the frontal sinus in patients with light/mild CRS and in patients with moderate/severe CRS at Lund-Mackay modified by Zinreich score. The same not statistically significative difference was observed comparing the results of SNOT-20 questionnaire in the group of light/mild frontal chronic rhinosinusitis. However, we noticed a statistically significant better outcome of SNOT-20 score in patients with moderate/severe chronic rhinosinusitis that underwent BCD of frontal sinus compared to ESS. CONCLUSIONS: BCD and ESS are two alternative weapons in the baggage of every endoscopic surgeon, even because they present similar outcomes, safeness and effectiveness both in light/mild and moderate/severe chronic rhinosinusitis of the frontal sinus. An interesting result of our study was the statistically significant better outcome of SNOT-20 score in patients that underwent BCD of frontal sinus for a moderate/severe CRS, compared to those that underwent a traditional ESS

L’ESPERIENZA DELLA SICILIA QUALE REGIONE CAPOFILA NELLA INTRODUZIONE DELLA VACCINAZIONE UNIVERSALE CONTRO I ROTAVIRUS

La gastroenterite da rotavirus (GARV) rappresenta uno dei principali bisogni assistenziali durante l’età pediatrica. Purtroppo, in Italia, in assenza di notifica obbligatoria e di specifici sistemi di sorveglianza, le uniche valutazioni epidemiologiche disponibili sulle GARV sono rese possibili dall’analisi delle ospedalizzazioni. Il presente lavoro ha avuto l’obiettivo di valutare le ospedalizzazioni per GARV e per intussuscezione, avvenute in Sicilia in soggetti di età compresa tra 0 e 60 mesi, negli anni 2003-2012 (periodo prevaccinale) e 2013 (anno di introduzione della vaccinazione antirotavirus). Nel periodo in esame si sono osservate 9.886 ospedalizzazioni per GARV con una media annua di 899 casi. La maggior parte dei ricoveri (62,3%) è stata registrata nella fascia di età compresa tra 0 e 2 anni con una progressiva riduzione negli anni di vita successivi. Durante il 2013 si è osservata una copertura vaccinale regionale attestatasi tra il 30 ed il 40% per la prima dose ed il 25-35% per la seconda dose. Nello stesso anno si è assistito ad una riduzione dei casi di GARV di circa il 38,9% nei soggetti di età 0-5 anni (931 casi/anno nel 2003-2012 vs. 569 nel 2013) e superiore al 50% nella fascia di età 0-11 mesi (277 casi/anno nel 2003-2012 vs. 137 nel 2013). Diversamente, nel 2013 il numero di ospedalizzazioni per intussuscezione in soggetti di età compresa tra 0 ed 11 mesi si è mantenuta in linea con quanto osservato in epoca prevaccinale (15 casi nel 2013 vs. 15,4 casi/anno osservati in media tra 2003 e 2012). I dati presentati evidenziano l’importante peso assistenziale che le GARV hanno annualmente in Sicilia e supportano l’efficacia della vaccinazione nella riduzione significativa dei casi di ospedalizzazione per GARV in assenza di incrementi di rischio di intussuscezione

Invited: High-level design methods for hardware security: Is it the right choice?

Due to the globalization of the electronics supply chain, hardware engineers are increasingly interested in modifying their chip designs to protect their intellectual property (IP) or the privacy of the final users. However, the integration of state-of-the-art solutions for hardware and hardware-assisted security is not fully automated, requiring the amendment of stable tools and industrial toolchains. This significantly limits the application in industrial designs, potentially affecting the security of the resulting chips. We discuss how existing solutions can be adapted to implement security features at higher levels of abstractions (during high-level synthesis or directly at the register-transfer level) and complement current industrial design and verification flows. Our modular framework allows designers to compose these solutions and create additional protection layers

Ant Colony Heuristic for Mapping and Scheduling Tasks and Communications on Heterogeneous Embedded Systems

To exploit the power of modern heterogeneous multiprocessor embedded platforms on partitioned applications, the designer usually needs to efficiently map and schedule all the tasks and the communications of the application, respecting the constraints imposed by the target architecture. Since the problem is heavily constrained, common methods used to explore such design space usually fail, obtaining low-quality solutions. In this paper, we propose an ant colony optimization (ACO) heuristic that, given a model of the target architecture and the application, efficiently executes both scheduling and mapping to optimize the application performance. We compare our approach with several other heuristics, including simulated annealing, tabu search, and genetic algorithms, on the performance to reach the optimum value and on the potential to explore the design space. We show that our approach obtains better results than other heuristics by at least 16% on average, despite an overhead in execution time. Finally, we validate the approach by scheduling and mapping a JPEG encoder on a realistic target architecture

The Role of Family Characteristics in Predicting Self-Regulation and Early Literacy in Kindergarten

The family context is an important aspect of a child’s environment that can provide helpful resources for fostering positive development or can be a source of risk. One risk factor that is present in an overwhelming number of families is low income status (Child Trends Databank, 2019). Children growing up in families with low-income are at a greater risk for lower self-regulation skills and worse academic performance (Duncan, Brooks-Gunn, & Klebanov, 1994; McClelland & Wanless, 2012; Sektnan, McClelland, Acock, & Morrison, 2010; Wanless, McClelland, Tominey, & Acock, 2011). The present study examined how aspects of the family, specifically how child sleep duration, breastfeeding exposure, maternal education and employment status, parent marital status, and housing mobility, were related to the development of self-regulation and early literacy skills specifically for children living in low-income families at the fall of their kindergarten year. In order to examine these associations, a multiple regression framework was used as well as a quantile regression to examine if family characteristics related differently to self-regulation and early literacy at five different quantile positions (10th, 25th, 50th, 75th, 90th) in the distribution of these skills. Results revealed that children in the sample were demographically similar in their family characteristics; 96% of children received 8-12 hours of sleep each night, 84% were breastfed, 62% lived with married/partnered parents, 77% of mothers completed 10-14 years of education, 55% of mothers were employed part-time or full-time, and 61% of children experienced 1-3 moves in the previous 5 years. Regression analyses revealed that breastfeeding exposure significantly and positively predicted self-regulation (B = 15.76, SE = 8.06, p = .05) and early literacy skills (B = 23.94, SE = 8.24, p = .004). Quantile regression analyses revealed that breastfeeding exposure predicted early literacy skills for children scoring within the 75th percentile (B = 15, SE = 5.59, p = .008) of early literacy skills. Results contribute to existing literature on how the family context impacts important developmental domains in a child’s life and provides information on potential places of intervention for children who are living amongst pertinent risk factors