This paper reports security problems with improper implementations of an improved version of FEA-M (fast encryption algorithm for multimedia). It is found that an implementation-dependent differential chosen-plaintext attack or its chosenciphertext counterpart can reveal the secret key of the cryptosystem, if the involved (pseudo-)random process can be tampered (for example, through a public ti...

Classic beam theory is frequently used in biomechanics to model the stress behaviour of vertebrate long bones, particularly when creating intraspecific scaling models. Although methodologically straightforward, classic beam theory requires complex irregular bones to be approximated as slender beams, and the errors associated with simplifying complex organic structures to such an extent are unkn...

Computer aided Finite Element Analysis (FEA) tools have been used since the late 1950’s. The asynchronous plot of simulations and the corresponding results consumes a large amount of engineering cycle time; additionally, applying FEA parameters on a 3D CAD model with 2D mouse/keyboard has always been a complex process. This paper presents the prototype of a software toolkit that performs real-t...

This article presents two applications of the nonlinear finite element analysis (FEA) using ABAQUS/Standard with a user developed material subroutine Nitinol UMAT from Abaqus West. The analyses are found to agree well with the theoretical prediction and/or experimental measurement. In that first example, FEA predicts the stress-strain response of a superelastic Nitinol device at different Af te...

Recently there is a trend towards using it in the early stages of design. A designer may use FEA just to validate the structural integrity of a design or she may use it for structural optimization along with the parametrized design techniques. This paper examines the requirements of a structural analysis agent and proposes an architecture to facilitate FEA in a concurrent design environment. Th...

Computer-based simulations are nowadays widely exploited for the prediction of the mechanical behavior of different biomedical devices. In this aspect, structural finite element analyses (FEA) are currently the preferred computational tool to evaluate the stent response under bending. This work aims at developing a computational framework based on linear and higher order FEA to evaluate the fle...

Columnar cell change in breast epithelium is frequently encountered in biopsies performed for evaluation of radiographically detected microcalcifications. While columnar cell change by itself is typically of no clinical consequence, on occasion cytologic atypia may be present, a finding now termed “flat epithelial atypia (FEA)”. Morphologic, immunophenotypic, and genetic associations between FE...

Abstract Magnetic resonance elastography (MRE) is a technique to identify the viscoelastic moduli of biological tissues by solving the inverse problem from the displacement field of viscoelastic wave propagation in a tissue measured by MRI. Because finite element analysis (FEA) of MRE evaluates not only the viscoelastic model for a tissue but also the efficiency of the inversion algorithm, we d...