Search results for "Volt"

La conoscenza: rilievi ed analisi

2009

Il contributo illustra criteri e fasi dell’indagine conoscitiva che è stata condotta nel corso dei lavori di restauro dei soffitti dipinti, a cantiere iniziato. Sono dettagliatamente descritte le metodologie e le operazioni di rilevamento e di analisi condotte con puntuali riferimenti agli strumenti impiegati. Il testo è corredato di alcune delle tavole tematiche prodotte per la perizia di variante, ed in particolare di quelle che restituiscono le informazioni quali-quantitative acquisite e l’indicazione esplicita di dove e come si intendesse intervenire, per perseguire esiti corretti dal punto di vista tecnico e metodologico.

A Design Methodology for Low-Power MCML Ring Oscillators

2007

In this paper, a low-power design method for MCML based ring oscillators is presented. The proposed method takes into account the parasitic capacitances of the MOS transistors. To validate it, some ring oscillators with different oscillation frequencies were designed in a 0.18 mum CMOS technology. SPICE simulations demonstrate the effectiveness of the design method.

Raimondo Marquett e Rubba

2008

Digital demodulation for fast set-up of sensorless PMSM electrical drives based on magnetic anisotropy

2009

This paper presents a demodulation algorithm applied to the sensorless control of permanent magnet synchronous motors (PMSM). The sensorless control technique reported in this paper is based on the injection of high frequency voltages to the stator so that the motor currents contain information on the rotor position. This information is then extracted by an appropriate demodulation technique. The presented demodulation algorithm is based on spectral analysis of the signal produced by the sensorless control technique because this is fully characterized and presents not ambiguous correlation between current harmonic content and rotor position. The most important feature of the demodulation al…

Commonalities and distinctions between two neurodevelopmental disorder subtypes associated with SCN2A and SCN8A variants and literature review.

2022

This study was aimed to analyze the commonalities and distinctions of voltage-gated sodium channels, Nav1.2, Nav1.6, in neurodevelopmental disorders. An observational study was performed including two patients with neurodevelopmental disorders. The demographic, electroclinical, genetic, and neuropsychological characteristics were analyzed and compared with each other and then with the subjects carrying the same genetic variants reported in the literature. The clinical features of one of them argued for autism spectrum disorder and developmental delay, the other for intellectual disability, diagnoses confirmed by the neuropsychological assessment. The first patient was a carrier of SCN2A (p.…

Light absorption in silicon quantum dots embedded in silica

2009

The photon absorption in Si quantum dots (QDs) embedded in SiO2 has been systematically investigated by varying several parameters of the QD synthesis. Plasma-enhanced chemical vapor deposition (PECVD) or magnetron cosputtering (MS) have been used to deposit, upon quartz substrates, single layer, or multilayer structures of Si-rich- SiO2 (SRO) with different Si content (43-46 at. %). SRO samples have been annealed for 1 h in the 450-1250 °C range and characterized by optical absorption measurements, photoluminescence analysis, Rutherford backscattering spectrometry and x-ray Photoelectron Spectroscopy. After annealing up to 900 °C SRO films grown by MS show a higher absorption coefficient a…

Organoboron Polymers for Photovoltaic Bulk Heterojunctions

2010

The effect of support schemes on Photovoltaic installed capacity in Europe: a WDEA-STATIS analysis

2014

The European Union (EU) has been committed to promoting Renewable Energy Sources (RES) since 1985, focusing its attention on the financial coordination needed to support the sector, and the possibility of harmonizing support scheme systems. Starting from this assumption, the aim of this study is to provide, by means of STATIS together with windows DEA analysis, a response about which kind of support schemes have worked best in a sample of 11 EU Member States over the last 15 years in terms of Photovoltaic overall installed capacity, the most expensive RES technology.

COSTRUZIONE E TAGLIO DELLA PIETRA IN ANATOLIA DAL XIII AL XV SECOLO: LA MOSCHEA E L'OSPEDALE DI DIVRIĞI

A computer controlled patterning system for scanning probe microscopes

1999

Abstract A pattern generator system for lithography based on scanning force microscopes has been developed. Patterns to be miniaturized onto a chip can be scanned or drawn by any common graphical program. The pattern file is used to control a voltage simultaneously with the microscope probe scanning the surface of the substrate. The voltage can be used in numerous different ways to manipulate the substrate, depending on the lithographic method preferred. We have demonstrated the system by adding this voltage to the z -piezo voltage of the scanner, in order to make the probe plow the pattern into a film spinned on the sample. To maintain linearity in zooming in and rotating the scanning dire…