one of the common problems in reflection seismic records in the land is the existence of surface waves with high amplitude and low frequency which cause the most important parts of reflective signals to be masked. therefore, it is necessary to attenuate them by processing and acquisition methods. as it is impossible to attenuate the surface waves completely, and sometimes it is likely to damage...

In this paper we present a novel broadband approach for the extraction of dispersion curves of multiple time frequency overlapped dispersive modes such as in borehole acoustic data. The new approach works jointly in the Fourier and space time domains and, in contrast to existing space time approaches that mainly work for time frequency separated signals, efficiently handles multiple signals wit...

Background: Mentally retarded influences social skills and adaptive behavior in children. That leads to social and communication impairment and adjusting social problem. Therefore, this research investigates the influence of puppet play therapy on adaptive behavior and social skills in male children with mentally retarded. Methods: This study is a quasi-experimental study with pre and post-tes...

One of the most critical decisions in the design of a localslant-stack transform (LSST) is the selection of its aperture, or more precisely, the selection of the appropriate number of traces and their weighting coefficients for each slant stack. The challenge is to achieve a good compromise between the slowness and the spatial resolution. Conventionally, the window size is chosen in a more intu...

In this paper, we analyze the performance of consensus protocols based on the rotating coordinator paradigm. We consider a simulated production environment, on which processing and communication resources available for the different processes running the protocols are not necessarily the same. Firstly, we show that, in some scenarios, the performance of the consensus protocol is enhanced when t...

primary assumption in most problems of elasticity theory in petroleum geophysics is that the elastic media is isotropic. laboratory experiments confirmed that most rocks are anisotropic. if in one medium, properties vary with directions, it is named as anisotropic. knowledge about anisotropy reduces risk and cost of hydrocarbon production. in the present study, anisotropy of a carbonate reservo...

The continuous data from the YL array and four AU stations during lifetime of cyclone TOMAS in March 2010 were downloaded IRIS. By performing frequency-wave number (F-K) analysis on data, it was found that orientation maximum energy secondary microseisms (0.1~0.5 Hz) consistent with movement when central wind speed reached typhoon level. high could generate as well swell. However, large global ...