Efficienza dei terminali di trasporto intermodale strada-rotaia italiani

Come evidenziato da ampia letteratura relativa alle infrastrutture di trasporto, tra i fattori che ne caratterizzano l’efficienza vi sono elementi di forte variabilità legati alla posizione geografica ed alla inclusione in reti di scambio internazionale di merci. L’articolo intende verificare se tali fattori sono osservabili per i terminali intermodali strada-ferrovia italiani. Utilizzando modelli con dati panel di frontiera stocastica è stata stimata l’efficienza tecnica dei terminali selezionati e verificato se essa è significativamente influenzata da elementi, oltre che dimensionali, di contesto operativo e di mercato. Attenzione particolare è stata posta alla verifica dell’evoluzione dell’efficienza nel tempo e se l’efficienza tecnica ha risentito di effetti di progresso tecnologico nel periodo 2007-2011. Con riferimento a tale periodo temporale, di forte variabilità della domanda di trasporto intermodale strada-ferro in Italia, sono stati applicati diversi modelli econometrici per valutare l’efficienza tecnica dei terminali intermodali e studiarne il relativo trend evolutivo nel tempo. I risultati dello studio mostrano un progresso tecnologico che ha negativamente contribuito alla produttività dei terminali nel periodo e che tutti i modelli applicati allo scopo hanno riscontrato un declino nell’efficienza tecnica

Technical efficiency with several stochastic frontier analysis models using panel data

The paper discusses technical efficiency analysis of italian rail terminals for a panel data from 2007 to 2011 considering variables related to production factors with a dynamic vision over time. To use of panel date makes the researchers think about whether inefficiency represented by the one-sided part of the error term varies true time or is constant true time. This paper use techniques, time varying and time invariant relating to estimation of stochastic production function and of technical effiency in order to analyze the production performance of rail road modal interchange terminal in Italy

Technical efficiency with several stochastic frontier analysis models using panel data

The paper discusses technical efficiency analysis of italian rail terminals for a panel data from 2007 to 2011 considering variables related to production factors with a dynamic vision over time. To use of panel date makes the researchers think about whether inefficiency represented by the one-sided part of the error term varies true time or is constant true time. This paper use techniques, time varying and time invariant relating to estimation of stochastic production function and of technical effiency in order to analyze the production performance of rail road modal interchange terminal in Italy

The study of relationship between financial performance and points achieved by Italian football championship clubs via GEE and diagnostic measures

Football is undoubtedly the most powerful and most popular sport in Italy, linking communities and stirring emotions. The main goal of any Football Championship club is to achieve sport results. The study of the relationship between sport and economic results attracts the interest of many scholars belonging to different disciplines. Very informative is considered the connection, over short or long periods of time, between the points in the championship and the resource allocation strategies. The aim of this paper is to give a interpretation of this last link using the Generalized Estimating Equation (GEE) for longitudinal data. Some diagnostic measures and graphical plots for checking the adequacy of GEE method will be presented and used

Out of kernel tuning and optimizations for portable large-scale docking experiments on GPUs

Virtual screening is an early stage in the drug discovery process that selects the most promising candidates. In the urgent computing scenario, finding a solution in the shortest time frame is critical. Any improvement in the performance of a virtual screening application translates into an increase in the number of candidates evaluated, thereby raising the probability of finding a drug. In this paper, we show how we can improve application throughput using Out-of-kernel optimizations. They use input features, kernel requirements, and architectural features to rearrange the kernel inputs, executing them out of order, to improve the computation efficiency. These optimizations’ implementations are designed on an extreme-scale virtual screening application, named LiGen, that can hinge on CUDA and SYCL kernels to carry out the computation on modern supercomputer nodes. Even if they are tailored to a single application, they might also be of interest for applications that share a similar design pattern. The experimental results show how these optimizations can increase kernel performance by 2 X, respectively, up to 2.2X in CUDA and up to 1.9X, in SYCL. Moreover, the reported speedup can be achieved with the best-proposed parameterization, as shown by the data we collected and reported in this manuscript

Near-Infrared Schottky Silicon Photodetectors Based on Two Dimensional Materials

Since its discovery in 2004, graphene has attracted the interest of the scientific community due to its excellent properties of high carrier mobility, flexibility, strong light-matter interaction and broadband absorption. Despite of its weak light optical absorption and zero band gap, graphene has demonstrated impressive results as active material for optoelectronic devices. This success pushed towards the investigation of new two-dimensional (2D) materials to be employed in a next generation of optoelectronic devices with particular reference to the photodetectors. Indeed, most of 2D materials can be transferred on many substrates, including silicon, opening the path to the development of Schottky junctions to be used for the infrared detection. Although Schottky near-infrared silicon photodetectors based on metals are not a new concept in literature the employment of two-dimensional materials instead of metals is relatively new and it is leading to silicon-based photodetectors with unprecedented performance in the infrared regime. This chapter aims, first to elucidate the physical effect and the working principles of these devices, then to describe the main structures reported in literature, finally to discuss the most significant results obtained in recent years

Erratum to nodal management and upstaging of disease. Initial results from the Italian VATS Lobectomy Registry

[This corrects the article DOI: 10.21037/jtd.2017.06.12.]

Pattern of care and effectiveness of treatment for glioblastoma patients in the real world: Results from a prospective population-based registry. Could survival differ in a high-volume center?

BACKGROUND: As yet, no population-based prospective studies have been conducted to investigate the incidence and clinical outcome of glioblastoma (GBM) or the diffusion and impact of the current standard therapeutic approach in newly diagnosed patients younger than aged 70 years. METHODS: Data on all new cases of primary brain tumors observed from January 1, 2009, to December 31, 2010, in adults residing within the Emilia-Romagna region were recorded in a prospective registry in the Project of Emilia Romagna on Neuro-Oncology (PERNO). Based on the data from this registry, a prospective evaluation was made of the treatment efficacy and outcome in GBM patients. RESULTS: Two hundred sixty-seven GBM patients (median age, 64 y; range, 29-84 y) were enrolled. The median overall survival (OS) was 10.7 months (95% CI, 9.2-12.4). The 139 patients 64aged 70 years who were given standard temozolomide treatment concomitant with and adjuvant to radiotherapy had a median OS of 16.4 months (95% CI, 14.0-18.5). With multivariate analysis, OS correlated significantly with KPS (HR = 0.458; 95% CI, 0.248-0.847; P = .0127), MGMT methylation status (HR = 0.612; 95% CI, 0.388-0.966; P = .0350), and treatment received in a high versus low-volume center (HR = 0.56; 95% CI, 0.328-0.986; P = .0446). CONCLUSIONS: The median OS following standard temozolomide treatment concurrent with and adjuvant to radiotherapy given to (72.8% of) patients aged 6470 years is consistent with findings reported from randomized phase III trials. The volume and expertise of the treatment center should be further investigated as a prognostic factor