objective: the present study aimed at investigating the relationship between attachment styles and self-efficacy in blind and non-blind female high school students in tehran. methods: the statistical population consisted of all female students studying in grades one or two in tehran girl’s high schools, in the academic year 2014. the study design was causal-comparative, conducted on 120 subject...

background: teachers, parents and foundations should become objective-oriented for children with visual impairment so that learning and sensitization of necessary knowledge and skills for the behaviors of these children are assisted. where there is impairment in the relations of children caregivers, their emotional security is disturbed and its effects will appear in their behaviors. therefore,...

The presence of residual carrier frequency offset (CFO) in an orthogonal frequency division multiplexing (OFDM) system leads to a loss of orthogonality between the subcarriers. This introduces inter-subcarrier interference and degrades the system performance significantly. In the literature, Liu and Tureli proposed a blind CFO estimation method based on the observation that in a typical OFDM sy...

Doppler scale estimation is one critical step needed by the resampling operation in acoustic communication receivers. In this paper, we compare different Doppler scale estimation methods using either cyclic-prefixed (CP) or zero-padded (ZP) orthogonal-frequency division-multiplexing (OFDM) waveforms. For a CP-OFDM preamble, a self-correlation method allows for blind Doppler scale estimation bas...

Finite impulse response (FIR) filters are considered the least constrained option for the blind estimation of the hemodynamic response function (HRF). However, they have a tendency to yield unstable solutions in the case of short-events sequences. There are solutions based on regularization, e.g. smooth FIR (sFIR), but at the cost of a regularization penalty and prior knowledge, thus breaking t...