Search results for "Costa"

Hidden oscillations in SPICE simulation of two-phase Costas loop with non-linear VCO

2016

Simulation is widely used for analysis of Costas loop based circuits. However it may be a non-trivial task, because incorrect choice of integration parameters may lead to qualitatively wrong conclusions. In this work the importance of choosing appropriate parameters and simulation model is discussed. It is shown that hidden oscillations may not be found by simulation in SPICE, however it can be predicted by analytical methods. peerReviewed

Nonlinear dynamical model of Costas loop and an approach to the analysis of its stability in the large

2015

The analysis of the stability and numerical simulation of Costas loop circuits for highfrequency signals is a challenging task. The problem lies in the fact that it is necessary to simultaneously observe very fast time scale of the input signals and slow time scale of phase difference between the input signals. To overcome this difficult situation it is possible, following the approach presented in the classical works of Gardner and Viterbi, to construct a mathematical model of Costas loop, in which only slow time change of signal's phases and frequencies is considered. Such a construction, in turn, requires the computation of phase detector characteristic, depending on the waveforms of the…

Nonlinear dynamical model of Costas loop and an approach to the analysis of its stability in the large

2015

The analysis of the stability and numerical simulation of Costas loop circuits for high-frequency signals is a challenging task. The problem lies in the fact that it is necessary to simultaneously observe very fast time scale of the input signals and slow time scale of phase difference between the input signals. To overcome this difficult situation it is possible, following the approach presented in the classical works of Gardner and Viterbi, to construct a mathematical model of Costas loop, in which only slow time change of signal?s phases and frequencies is considered. Such a construction, in turn, requires the computation of phase detector characteristic, depending on the waveforms of th…

Wellness Centres on Costa Crociere Cruises: Body, Space, and Representation from an Anthropological and Linguistic perspective

2016

Many tourist services are connected to the care of the body. The tourist industry proposes different vacation opportunities where the body is the main focus of the experience. This kind of tourism implies specific services that show a particular universe of representation and particular languages. In this context, cruise tourism is an interesting case to analyze because a part of its services gives a central role to the body which, on-board, organizes and is organized within dedicated spaces and times. Cruise ships provide spaces for the wellness of the passengers such as swimming pools, gyms, spas or beauty centres. The analysis proposed in this work is based, on one hand, on a recent anth…

Luoghi di culto pagano in Italia e nelle altre province dai Tetrarchi a Teodosio: la documentazione epigrafica

2016

III Foro de Cultura y Naturaleza. Dossier de prensa

2000

Es un dossier de prensa con varios artículos de distintos diarios sobre el "III Foro de Cultura y Naturaleza", coordinado por José Vidal-Beneyto y celebrado en Santander del 14 al 16 de septiembre del 2000. Se incluye una entrevista a Vidal-Beneyto realizada por Javier Sakona y publicada en "La Realidad", en su edición del 25 de septiembre al 1 de octubre del 2000.

Marine Discharges of Offshore Produced Water: the North-East Atlantic Management Strategy

2002

Este capítulo contiene un estudio de Derecho internacional del medio ambiente sobre las normas y estrategias para prevenir y eliminar la contaminación resultante de hidrocarburos y otras substancias causadas por las descargas de agua de producción costa afuera en el mar. Debemos tener en cuenta que no existe ni un solo tratado internacional de ámbito mundial relativo a la contaminación por descargas de hidrocarburos contenidas en las aguas de producción generadas en las instalaciones costa afuera. De hecho, sólo hay una región marina donde existen normas jurídicas y estrategias para hacer frente a este problema de contaminación. La región marina es el Atlántico nordeste y la norma en cuesti…

I governatori nelle regiones italiche tra Diocleziano e i Costantinidi

New molecular data attest to the absence of cospeciation patterns between Placobdella costata (Fr. Müller, 1846) (Hirudinea) and freshwater turtles (…

2021

The only Palearctic representative of the leech genus Placobdella Blanchard, 1893 is P. costata, an ectoparasite of freshwater turtles. To date, no conclusive evidence about the possible presence of coevolutionary patterns between this leech and its turtle hosts is available due to the paucity of DNA sequence data available for P. costata; moreover, comparative host data is also mostly lacking, making any inferences more difficult. The discovery of new populations of the species in northern Italy and Sicily allowed us to generate novel mitochondrial DNA sequences and to compare the topology of the resulting phylogenetic trees with the phylogeny of the turtle hosts occurring in the study are…

The Eucharist or the Lord's Supper in the light of the Catholic-Pentecostal dialogue (1972-2015)

2019

The ongoing Catholic-Pentecostal dialogue highlighted a certain disproportion in the approach of each of the parties to the Eucharist or the Lord's Supper. For Pentecost Christians participation in the Lord's Supper is of secondary importance. Common conversations been shown that in Catholic spirituality the Eucharist occupies a significant and central place. It is the presence of the sacrifice that took place once and for all on the cross of Christ. Pentecostals are not unanimous, however, in the meaning of the Lord's Supper. For this community usually the Lord's Supper means only commemoration of Last Supper. They do not believe, however, that during it the bread and wine will transform t…