the stolt (f-k) migration algorithm is a direct (i.e. non-recursive) fourier-domain technique based on a change of variables (or equivalently, a mapping) that converts the input spectrum to the output spectrum. the algorithm is simple and efficient but limited to constant velocity. a v(z)(f-k) migration method, capable of very high accuracy for vertical variations of velocity, can be formulated...

this paper presents a method for identification of linear system physical parameters (structural mass, damping and stiffness matrices) using the inverse solution of equation of motion in the frequency domain, by focus on the reducing the illconditioning effect. the method utilizes the measured responses from the forced vibration test of structure in order to identify the system properties and d...

Fibroblasts organize the modular cell-adhesive glycoprotein fibronectin into a highly structured pericellular matrix by poorly understood mechanisms. Previous studies implicated an amino-terminal domain in matrix assembly and suggested that fibronectin's cell-adhesive domain and the corresponding fibroblast receptor were not involved in this process. To further elucidate the fibronectin region(...

In the present paper, applicability of the modified fixed grid finite element method in solution of three dimensional elasticity problems of functionally graded materials is investigated. In the non-boundary-fitted meshes, the elements are not conforming to the domain boundaries and the boundary nodes which are used in the traditional finite element method for the application of boundary condit...

The structure of the nucleon is one of the fundamental problems that lattice QCD can address. In the last few years, substantial efforts have been made by several groups [1,2,3,4] in calculating the non-perturbative matrix elements relevant to nucleon structure. Up to now only Wilson fermions, improved and unimproved, have been used in both the quenched approximation and in full QCD. In this re...

background: protein-protein interactions do not provide any direct information re­garding the domains within the proteins that mediate the interactions. the majority of proteins are multi domain proteins and the interaction between them is often defined by the pairs of their domains. most of the former studies focus only on interacting do­main pairs. however they do not consider the interaction...

The frequency domain technique is both iterative and adaptive, involving convolution of the measured Inverse Multiple Input Multiple Output (MIMO) Frequency Response Function (FRF) matrix with the matrix of reference time histories. In contrast to the time domain technique, the frequency domain technique can adapt during a test by performing real time updates of the FRF matrix between drive and...