In this paper, the authors present a modified convergent analytic algorithm for the solution of nonlinear boundary value problems by means of a variable parameter method and briefly, the method is called optimal variable parameter method. This method, based on the embedding of a parameter and an auxiliary operator, provides a computational advantage for the convergence of the approximate soluti...

GRB 211211A was accompanied by a kilonova, implying merger origin for the event. A precursor flare, modulated quasi-periodic oscillations at $\approx 22\, \mbox{Hz}$, also seen 1\, \mbox{s}$ prior to main emission. It is suggested here that resulted from resonant shattering of one star's crust coalescence. Seismic aftershocks and low-frequency torsional modes may emanate rupture site in this ca...

    In this research in order to frequency analysis of maximum daily rainfall in various climates of Iran the data of 40 synoptic rain gauges collected in 40 years period i.e., 1973 to 2012 were used. These stations are located in various climates of Iran according to De Martonne climatic classification. At first, input of data to HYFA package was performed. The mentioned package includes seven...

History demonstrates the great value of frequency domain data for understanding the physics of complex processes. The Cumulative Spectral Power (CSP) opens a new window into the study of earthquake evolution [2]. For this purpose, the CSP has a significant advantage over the Power Spectral Density (PSD) from which it is derived by integration. The FFT spectrum used to generate the PSD is inhere...