Search results for "Sign"

An algorithm based on the PPC (Polynomial Parametric Curve) for designing horizontal highway alignments

2015

Criteria for geometric design of highway alignments have been studied in various researches so far, providing new methods, as alternative to traditional approaches. They can be useful for obtaining better solutions, characterized by high performances in terms of motion safety and comfort. In particular, continuous curvature alignments, based on polynomial functions, are highly consistent solutions with users' driving behaviour and vehicle trajectories. Moreover, alignment geometry optimization allows engineers to minimize dynamic effects on drivers with considerable advantages in terms of comfort and safety. This paper carries on the research of a previous study, in which a polynomial param…

Acoustic, neural, and perceptual correlates of polyphonic timbre

2012

Multi-modality of polysomnography signals’ fusion for automatic sleep scoring

2019

Objective: The study aims to develop an automatic sleep scoring method by fusing different polysomnography (PSG) signals and further to investigate PSG signals’ contribution to the scoring result. Methods: Eight combinations of four modalities of PSG signals, namely electroencephalogram (EEG), electrooculogram (EOG), electromyogram (EMG), and electrocardiogram (ECG) were considered to find the optimal fusion of PSG signals. A total of 232 features, covering statistical characters, frequency characters, time-frequency characters, fractal characters, entropy characters and nonlinear characters, were derived from these PSG signals. To select the optimal features for each signal fusion, four wi…

Le pont des Grilles de la Basse-Seille (fin XIVe siècle), ancienne porte d’eau de l’enceinte urbaine de Metz

2017

The bridge des Grilles de la Basse-Seille is one of the last vestiges of the medieval fortification in Metz. It is one of rare examples of fortified bridge in France. Built in the end of the 14th century, it is backfilled in 1911 and only its upper section is visible. An archaeological and historic study was made in 2011 to understand the configuration and the functioning of the bridge in the Middle Ages.

Note sulla definizione della possessio nel Festo Farnesiano (Napoli, BNN, IV. A. 3)

2019

The eleventh-century manuscript known as the Codex Farnesianus (now Naples, BNN, IV. A. 3) sole medieval witness of Sextus Pompeius Festus' work De verborum significatione, transmits Aelius Gallus' definition of the legal concept of possession (Fest. pp. 260-262 L.). The interpretation of this definition entirely depends on the reconstruction of the text. Two passages are problematical because of two blank spaces (fol. 11r int., lin. 3 and lin. 4), in connection with which the scribe characterizes the model of the manuscript as 'blind' (caecus). Lindsay's edition of Festus' work does not constitute a codicologically valid starting point of for a reliable reconstruction of the definition. Fu…

Model of line to shield power line communication system on a Medium Voltage network

2010

In this paper a complete model of a power line communication (PLC) system on a Medium Voltage (MV) network is presented in the case of a line-ground configuration. A simple and friendly Simulink (R) software is used to develop the model. A distributed parameter MV cable model in line-ground configuration is considered together with the power transformers, the signal coupling networks and the receiving and transmitting line coupling interface of a ST7540 FSK powerline transceiver. The performances of the complete PLC communication system are evaluated for different line lengths by means of the attenuation computed as ratio between the received and transmitted voltage signals.

Simulation of a Power Line Communication System in Medium and Low Voltage Distribution Networks

2011

The aim of the paper is to study the influence of the power transformer on signal transmission in the case of a power line communication (PLC) system in a overhead Medium Voltage (MV) power network. A model of the PLC system was carried out by means of the Simulink® software. A distributed parameter MV overhead line, two power transformers, the signal coupling networks and the receiving and transmitting line coupling interface of a ST7540 FSK powerline transceiver were included in the model. The performances of the complete PLC communication system are evaluated for different line lengths by means of the attenuation computed as ratio between the received and transmitted voltage signals.

Innovative Solutions for the Integration of Renewable Energies on Tunisian and Sicilian Electrical Grids

2022

The rapid spread of distributed generation from renewable energy sources, combined with their unpredictable behavior, requires the continuous monitoring and control by the Distribution System Operator, in order to guarantee the stability and efficiency of the distribution network. Thus, in this paper a new measurement and communication architecture is proposed, which foresees the use of innovative devices and different technology-oriented solutions, even redundant ones, which allows the transition from passive to active electricity distribution network, with minimal structural changes. The architecture has been developed in the framework of the SInERT project (Italy-Tunisia cross-border coo…

A Line Impedance Calculator Based on a G3 PLC Modem Platform

2022

Power line communication (PLC) is one of the most today used technologies for both automatic meter reading and many other smart grid applications. In this framework, a characterization of the electrical network in the PLC frequency range is needed in terms of impedance measurement and received signal level. This can allow choosing the most suitable and less noisy frequency ranges for PLC transmission. Usually, these characterization measurements are performed with dedicated instrumentation and in the absence of mains voltage. This article wants to propose an alternative solution, which allows these kinds of measurements to be performed using electronic boards currently used as on-field appl…

Prioritizing covariates in the planning of future studies in the meta-analytic framework

2016

Science can be seen as a sequential process where each new study augments evidence to the existing knowledge. To have the best prospects to make an impact in this process, a new study should be designed optimally taking into account the previous studies and other prior information. We propose a formal approach for the covariate prioritization, i.e., the decision about the covariates to be measured in a new study. The decision criteria can be based on conditional power, change of the p-value, change in lower confidence limit, Kullback-Leibler divergence, Bayes factors, Bayesian false discovery rate or difference between prior and posterior expectation. The criteria can be also used for decis…