In this paper we demonstrate the parallelism of the spectral division via the matrix sign function for the generalized nonsymmetric eigenproblem. We employ the so-called generalized Newton iterative scheme in order to compute the sign function of a matrix pair. A recent study has allowed considerable reduction (by 75%) in the computational cost of this iteration, making this approach competitiv...

An understanding of the biological roles of lectins will be advanced by ligands that can inhibit or even recruit lectin function. To this end, glycomimetics, noncarbohydrate ligands that function analogously to endogenous carbohydrates, are being sought. The advantage of having such ligands is illustrated by the many roles of the protein DC-SIGN. DC-SIGN is a C-type lectin displayed on dendriti...

In this paper we discuss the numerical solution of projected generalized Lyapunov equations using the matrix sign function method. Such equations arise in stability analysis and control problems for descriptor systems including model reduction based on balanced truncation. It is known that the matrix sign function method applied to a matrix pencil λE−A converges if and only if λE−A is of index ...

The ubiquitous presence of cell-surface sialic acid (SIA) has complicated efforts to identify specific transmembrane glycoproteins that function as bone fide entry receptors for influenza A virus (IAV) infection. The C-type lectin receptors (CLRs) DC-SIGN (CD209) and L-SIGN (CD209L) enhance IAV infection however it is not known if they act as attachment factors, passing virions to other unknown...

Despite showing an overtly simple structure, the semantic process in classic literary-narrative discourse conforms to complicated semiotic systems. As a result, semio-semantics is deemed as one of the most scientific, reliable tools since it helps intradiscursive semio-textual propositions be phenomenologically, and even epistemologically, analyzed. Consequently, the narrative discourse in “The...

We give a complexity dichotomy for the problem of computing the partition function of a weighted Boolean constraint satisfaction problem. Such a problem is parameterized by a set Γ of rational functions, each of which assigns a weight to each variable assignment. Our dichotomy extends previous work in which the weight functions were restricted to being non-negative. We represent a weight functi...

The two criteria most commonly used in blind equalization are Sato's cost function and Godard's cost function. In this paper we analyze a sign-error cost function for real signals which gives an error term that can be viewed as the sign of either the Sato or the Godard error. We show that the conventional de nition of equalizer convergence is not suitable for analyzing this cost function. A mor...

background: one of the economic evaluation techniques involves calculation of willingness to pay (wtp) for a service to find out the value of that service from the clients’ perspective. this study estimated wtp for both breast cancer and osteoporosis screening and comparatively examined the contributing factors. in fact, the comparisons served to provide an exact analysis of individual attitude...

We investigate the Oja sign covariance matrix (Oja SCM) for estimating partial correlations in multivariate data. The Oja SCM estimates directly a multiple of the precision matrix and is based on the concept of Oja signs, which generalise the univariate sign function and obey some form of affine equivariance property. We compare it to the classical MLE as well as to estimates based on two alter...