4,330 research outputs found
Generalized Adaptors with Memory for Nonlinear Wave Digital Structures
The problem of modeling a nonlinear resistor in the
Wave Digital domain can be seen as that of apply
ing to its nonlinear characteristic the ane transforma
tion that maps Khirchho variables into wave variables
When dealing with nonlinear elements with memory
such as nonlinear capacitors and inductors the above
approach cannot be applied as ane transformations
are memoryless.
In this paper a new approach is proposed for modeling
nonlinear elements with memory in the wave domain
The method we propose denes a more general class
of wave variables and adaptors with memory that un
der some conditions can incorporate the memory of
a nonlinear circuit and allow us to treat some nonlinear
elements with memory as if they were instantaneous
Generalized Adaptors with Memory for Nonlinear Wave Digital Structures
The problem of modeling a nonlinear resistor in the
Wave Digital domain can be seen as that of apply
ing to its nonlinear characteristic the ane transforma
tion that maps Khirchho variables into wave variables
When dealing with nonlinear elements with memory
such as nonlinear capacitors and inductors the above
approach cannot be applied as ane transformations
are memoryless.
In this paper a new approach is proposed for modeling
nonlinear elements with memory in the wave domain
The method we propose denes a more general class
of wave variables and adaptors with memory that un
der some conditions can incorporate the memory of
a nonlinear circuit and allow us to treat some nonlinear
elements with memory as if they were instantaneous
Introduzione alle tecniche di sintesi della musica con elaboratore
ItPer produrre la musica con l'elaboratore si impiegano delle opportune tecniche di sintesi.In questo lavoro prima vengono esaminate le tecniche di generazione del suono,eventualmente con parametri lentamente variabili nel tempo;poi quelli che trasformano il suono in modo lineare o non lineare.Per ciascun tipo sono presentati i metodi piĂą diffusi e ne vengono discussi vantaggi e svantaggi,cercando di porre in evidenza le possibilitĂ applicative
Manejo da adubação verde para produção de mandioca em solo arenoso.
bitstream/CNPS-2010/14898/1/circtec32-2005-adubacao-verde.pd
High-resolution tracking in a GEM-Emulsion detector
SHiP (Search for Hidden Particles) is a beam dump experiment proposed at the
CERN SPS aiming at the observation of long lived particles very weakly coupled
with ordinary matter mostly produced in the decay of charmed hadrons. The beam
dump facility of SHiP is also a copious factory of neutrinos of all three kinds
and therefore a dedicated neutrino detector is foreseen in the SHiP apparatus.
The neutrino detector exploits the Emulsion Cloud Chamber technique with a
modular structure, alternating walls of target units and planes of electronic
detectors providing the time stamp to the event. GEM detectors are one of the
possible choices for this task. This paper reports the results of the first
exposure to a muon beam at CERN of a new hybrid chamber, obtained by coupling a
GEM chamber and an emulsion detector. Thanks to the micrometric accuracy of the
emulsion detector, the position resolution of the GEM chamber as a function of
the particle inclination was evaluated in two configurations, with and without
the magnetic fiel
A high stability semiconductor laser system for a Sr-based optical lattice clock
We describe a frequency stabilized diode laser at 698 nm used for high
resolution spectroscopy of the 1S0-3P0 strontium clock transition. For the
laser stabilization we use state-of-the-art symmetrically suspended optical
cavities optimized for very low thermal noise at room temperature. Two-stage
frequency stabilization to high finesse optical cavities results in measured
laser frequency noise about a factor of three above the cavity thermal noise
between 2 Hz and 11 Hz. With this system, we demonstrate high resolution remote
spectroscopy on the 88Sr clock transition by transferring the laser output over
a phase-noise-compensated 200 m-long fiber link between two separated
laboratories. Our dedicated fiber link ensures a transfer of the optical
carrier with frequency stability of 7 \cdot 10^{-18} after 100 s integration
time, which could enable the observation of the strontium clock transition with
an atomic Q of 10^{14}. Furthermore, with an eye towards the development of
transportable optical clocks, we investigate how the complete laser system
(laser+optics+cavity) can be influenced by environmental disturbances in terms
of both short- and long-term frequency stability.Comment: 9 pages, 9 figures, submitted to Appl. Phys.
Monitoraggio ambientale e biologico dell’esposizione ad idrocarburi mono-aromatici ed a metil tert-butil etere in un gruppo di lavoratori addetti all’erogazione di carburanti
Lo studio è stato condotto per valutare
gli indicatori biologici di esposizione a vapori di benzina
in lavoratori addetti all’erogazione di carburante tramite
un approccio combinato di monitoraggio ambientale
e biologico. L’esposizione personale a benzene, toluene,
etilbenzene e xilene (BTEX) e l’escrezione urinaria di BTEX,
metil tert-butil etere (MTBE-U), degli acidi trans,transmuconico
(t,t-MA) ed S-fenilmercapturico (S-PMA) e della
cotinina sono stati valutati con tecniche cromatografiche
accoppiate alla spettrometria di massa. I livelli di MTBE-U
erano influenzati dalla sola esposizione professionale a vapori
di benzina, mentre quelli di B-U ed S-PMA dipendevano
da abitudine tabagica ed esposizione professionale
The micro-RWELL layouts for high particle rate
The -RWELL is a single-amplification stage resistive Micro-Pattern
Gaseous Detector (MPGD). The detector amplification element is realized with a
single copper-clad polyimide foil micro-patterned with a blind hole (well)
matrix and embedded in the readout PCB through a thin Diamond-Like-Carbon (DLC)
sputtered resistive film. The introduction of the resistive layer, suppressing
the transition from streamer to spark, allows to achieve large gains
(10) with a single amplification stage, while partially reducing the
capability to stand high particle fluxes. The simplest resistive layout,
designed for low-rate applications, is based on a single-resistive layer with
edge grounding. At high particle fluxes this layout suffers of a non-uniform
response. In order to get rid of such a limitation different current evacuation
geometries have been designed. In this work we report the study of the
performance of several high rate resistive layouts tested at the CERN H8-SpS
and PSI M1 beam test facilities. These layouts fulfill the requirements
for the detectors at the HL-LHC and for the experiments at the next generation
colliders FCC-ee/hh and CepC
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