the outcomes of development of urbanization as pollution of air, water and urban environment are great threats to the health and safety of urban residents. nowadays, urban areas as centers of population and economic activities show high concentrations of pollutants; so that, inconvenient locations of irksome and pollutant jobs in metropolitans such as isfahan city have led to serious threats to...

STUDY OBJECTIVES This work assesses the prevalence and development of disturbing dreams among adolescents and the association of these dreams with anxiety. DESIGN Sex differences in prevalence were analyzed with chi-square analyses. Changes over time were assessed with Wilcoxon tests and cross-tabulation tables. Associations with anxiety and DSM-III-R symptoms were assessed with ANOVA designs...

A finite measurement time is at the origin of transient (sometimes called leakage) errors in nonparametric frequency response function (FRF) estimation. If FRF varies significantly over resolution experiment (= reciprocal time), then these transients (leakage) cause important bias and variance estimate. To decrease errors, several local modeling techniques have been proposed literature. This ar...

Because the output signal of time grid sensor is so weak and easily affected by disturbing noise, it difficult to extract induction containing position information, when used detect rotor permanent magnet synchronous motor (PMSM). In this paper, an adaptive monostable stochastic resonance method proposed realize detection sensor. The tunnel magnetoresistance effect (TMR) adopted change magnetic...

INTRODUCTION Fetus and neonate spend most of their time sleeping inside and outside the womb. Sleep is considered a crucial action of neonatal period similar to breathing and nutrition. It plays a key role in brain development. Today, it is shown that sleep plays a predominant role in body temperature regulation, energy saving and neuronal detoxification. Sleep is the most important behavioral ...

The minimum description length principle in wavelet denoising can be extended from the standard linear-quadratic setting in several ways. We describe briefly three extensions: soft thresholding, histogram modeling and a multicomponent approach. The MDL hard thresholding approach based on the normalized maximum likelihood universal modeling can be extended to include soft thresholding shrinkage,...

Here we numerically study the emergence of stochastic resonance as a mild phenomenon and how this transforms into an amazing enhancement of the signal-to-noise ratio at several levels of a disturbing ambient noise. The setting is a cooperative, interacting complex system modelled as an Ising-Hopfield network in which the intensity of mutual interactions or "synapses" varies with time in such a ...

Personal audio systems (PAS) use is a major risk factor for noise-induced hearing loss (NIHL). PAS include content device and earbuds or headphones listening to personal without disturbing others. are inherently unsafe because their design exposes users high sound pressure levels. at about 4-times greater of developing NIHL than non-users, with reported in as young 9. The greatest > 1 hour dail...

This article presents a method for estimating linear time-varying approximation of general class nonlinear (NLTV) systems. It starts from noisy measurements the response NLTV system to special periodic excitation signals. These are subject measurement noise, process and trend. The proposed is two-step procedure. First, disturbing noise variance quantified. Next, using this knowledge, dynamics e...