Search results for "GAIN"
showing 10 items of 625 documents
Measuring Perceived Severity of Intimate Partner Violence against Women (IPVAW) among the General Population and IPVAW Offenders
2022
ABSTRACT Public perceptions of the severity of intimate partner violence against women (IPVAW) incidents are an important factor that has been linked to key issues regarding this type of violence, such as acceptability or tolerance, personal sense of responsibility, attitudes toward intervention, and the public's, professionals', and victims' responses to IPVAW. The aim of the present study was to provide further validity evidence for the perceived severity of IPVAW scale (PS-IPVAW), by assessing its measurement invariance between gender and age groups, and between men from the general population and male IPVAW offenders. Item response theory was also used to assess the discrimination of th…
Maternal body mass index, change in weight status from childhood to late adulthood and physical activity in older age
2021
This study aimed to examine the longitudinal associations of maternal body mass index (BMI), weight status in childhood and late adulthood and device-measured total physical activity (TPA) in older age. The study involves 552 participants from Helsinki Birth Cohort Study who were born in Helsinki, Finland, in 1934-1944. TPA was measured with a multisensory body monitor at a mean age of 70 years and expressed in metabolic equivalent of task hours/day (METh/d). Childhood overweight (BMI > 85th percentile) was based on school health records at 6-7 years of age, and late adulthood overweight (BMI >= 25 kg/m(2)) was based on clinical measurements at the mean age of 61 years. Childhood overweight…
Some Outcomes of Pressure, Ingratiation, and Rational Persuasion Used With Peers in the Workplace1
2003
In a cross-sectional organizational field study, the effects of ingratiation, pressure, and rational persuasion on performance appraisal, compliance gaining, and reactance were investigated. Actors were asked to describe their lateral-influence strategies, and peers were asked to assess actors’ impact. Actors and assessors from 140 German lateral-influence dyads who were public officeholders and employees participated in the study. The data support the hypothesis that the more an actor uses rational persuasion and the longer the assessor has known the actor, the more positively the assessor will evaluate the actor's task performance. In addition, the results support the hypothesis that the …
Effects of nonlinearity and substrate’s deformability on modulation instability in NKG equation
2017
International audience; This article investigates combined effects of nonlinearities and substrate's deformability on modulational instability. For that, we consider a lattice model based on the nonlinear Klein-Gordon equation with an on-site potential of deformable shape. Such a consideration enables to broaden the description of energy-localization mechanisms in various physical systems. We consider the strong-coupling limit and employ semi-discrete approximation to show that nonlinear wave modulations can be described by an extended nonlinear Schrodinger equation containing a fourth-order dispersion component. The stability of modulation of carrier waves is scrutinized and the following …
Multi-longitudinal mode emission in a bidirectional laser model
2011
Multi-longitudinal mode emission is a fundamental issue in laser physics. Interestingly enough, the mechanisms responsible for the transition from single- to multi-longitudinal mode emission have not been completely clarified yet. For example, it is well known that in unidirectional ring lasers the Rabi splitting of the lasing transition can lead to multimode emission even in a homogeneously broadened medium, the so called Risken-Nummedal—Graham-Haken instability (RNGHI) [1]. In spite of being known since the late sixties, only in the recent years a couple of experiments have demonstrated “dressed” versions of the RNGHI [2], i.e., up to day there are not clear demonstrations of this basic m…
Stabilisation of dispersion-managed soliton transmissions by nonlinear gain
1999
Nonlinear gain is shown to be effective in suppressing the radiative background that may not be separated from the signal when the average dispersion is close to zero in dispersion-managed soliton transmissions. By correctly combining nonlinear gain and filtering, the instability introduced by guiding filters can be avoided.
Theoretical gain spectrum of coherently pumped mid-infrared Fabry-Pérot lasers
1992
Abstract We study the gain spectrum of a coherently pumped mid-infrared laser which operates in a linear-cavity (Fabry-Perot), using a three-level density matrix theory. Arbitrary pump and emission field strengths as well as pressure and Doppler broadening are considered. A new strong directional gain asymmetry is found, which is related to the presence of two counterpropagating components in the standing-wave generated field. Gain lineshapes in a wide range of operating conditions are obtained and analysed.
Influence of light polarization on the dynamics of optically pumped lasers.
1990
The dynamic behavior of a coherently pumped ring laser with a homogeneously broadened four-level medium is analyzed theoretically, considering linearly polarized pump and generated laser beams. The laser is shown to be much more stable when these polarizations are parallel than when they are orthogonal. In the latter case the instability pump threshold can be as low as four times the first laser threshold, and the laser dynamics shows Lorenz-type features.
Comprehensive Theoretical and Experimental Study of Short- and Long-Term Stability in a Passively Mode-Locked Solitonic Fiber Laser
2015
We demonstrate the short- and long-term stable operation of an all-polarization-maintained Fabry–Perot cavity passively mode-locked fiber laser. The laser operates in an all-anomalous-dispersion solitonic regime. Laser stability is studied by a variety of measurements, which confirm the high stability of the laser in the temporal and spectral–both optical and electrical-domains. Pulse durations of 540 fs, period-relative time jitters of $\sim$ 0.015‰, and long-term uninterrumped operation with 0.4% variation (standard deviation) in the average output power are obtained. The highly stable operation of the laser oscillator was maintained after amplifying the laser output with a conventional E…
THE QUANTITATIVE RECORDING OF SEISMIC EVENTS WITH EXTREMELY LARGE AMPLITUDE VARIATIONS BY DISCONTINUOUS GAIN CONTROL*
1963
A transistorized combination of multivibrators is described, by which the gain is set according to a time programme. This equipment allows quantitative recording of seismic events with extremely large amplitude variations. Some possible applications of this recording system to seismic research are discussed. ZUSAMMENFASSUNG Es wird eine transistorisierte Zeitschalterkombination beschrieben, die zur Einstellung vorgewahlter Verstarkungsstufen nach Zeitprogramm dient. Mit dieser Anordnung lassen sich seismische Vorgange mit beliebigen Amplituden-Anderungen quantitativ erfassen. Es werden einige Beispiele der seismischen Forschung diskutiert, bei denen diese Regis-triertechnik erfolgreich eing…