We report on the detection with RXTE of variable high frequency features in the power spectra of the black hole candidate 4U 1630–47 during its 1998 outburst. We find high frequency features during the rise and the early decay of the outburst in the range of ∼ 100–300 Hz. The features are usually found to be broad, and have rms amplitudes of ∼ 2–8%; their frequencies are correlated with count r...

In this paper, a dynamical system, which consists of two linear mechanical oscillators, coupled with a nonlinear damping device is considered. First, the dynamic equations are derived, then, an analytical method such as harmonic balance method, is applied to obtain the response to a harmonic base excitation. The response of the system depends on the excitation characteristics. A parametric stud...

Several outcome tools have been developed to measure physical functioning in pediatric orthopedic patients. One such tool, the Activities Scale for Kids (ASK), allows assessment of physical functioning in the community in 5to 15-year-olds. Previous validation of the ASK showed a significant difference in scores according to global ratings of disability. In this study, the ASK was administered t...

OBJECTIVE To investigate whether motor evoked potential (MEP) amplitude ratio measurements are sufficiently objective to assess functional activities of the extremities. We also delineated the distribution between the presence or absence of MEPs and the Medical Research Council (MRC) scale for muscle strength of the extremities. METHODS We enrolled 183 patients with first-ever unilateral hemi...