objectives: the aim of this research is to compare cognitive flexibility and adjustment between two groups of students with developmental coordination disorder (dcd) and typically developing students. methods: for this purpose, 50 students with dcd and 50 typically developing students were chosen among 12 primary schools. the developmental coordination disorder questionnaire (dcd-q), adjustment...

In This Issue In This Issue BMP in a hairy situation morphogen must be both off and on for hairs to grow, according to Kobielak et al. on page 609. Their studies of bald mice reveal that bone morphogenetic protein (BMP) controls the switch from dividing to differentiating hair cells by working at the right time and place. Hair cells arise from a pool of epithelial precursors that first prolifer...

In This Issue In This Issue BMP in a hairy situation morphogen must be both off and on for hairs to grow, according to Kobielak et al. on page 609. Their studies of bald mice reveal that bone morphogenetic protein (BMP) controls the switch from dividing to differentiating hair cells by working at the right time and place. Hair cells arise from a pool of epithelial precursors that first prolifer...

The focus of this paper is improving individual Private Finance Initiative (PFI) projects to deliver better value for the benefit of the partners in PFI. Signing long term contracts of 20 to 30 years with the private sector typically enlarges demand risks in PFI. Subsequently, this report seeks a way to deliver more valuable PFI projects by the effective management of demand risks. Incorporatio...

for $a,bin m_{nm},$ we say that $a$ is left matrix majorized (resp. left matrix submajorized) by $b$ and write $aprec_{ell}b$ (resp. $aprec_{ell s}b$), if $a=rb$ for some $ntimes n$ row stochastic (resp. row substochastic) matrix $r.$ moreover, we define the relation $sim_{ell s} $ on $m_{nm}$ as follows: $asim_{ell s} b$ if $aprec_{ell s} bprec_{ell s} a.$ this paper characterizes all linear p...

for vectors x, y ∈ rn, it is said that x is left matrix majorizedby y if for some row stochastic matrix r; x = ry. the relationx ∼` y, is defined as follows: x ∼` y if and only if x is leftmatrix majorized by y and y is left matrix majorized by x. alinear operator t : rp → rn is said to be a linear preserver ofa given relation ≺ if x ≺ y on rp implies that t x ≺ ty onrn. the linear preservers o...

in this article, we characterize the involutiveness of the linear combination of the forma1a1 +a2a2 when a1, a2 are nonzero complex numbers, a1 is a quadratic or tripotent matrix,and a2 is arbitrary, under certain properties imposed on a1 and a2.

in this paper, at rst for a given set of real or complex numbers  with nonnegative summation, we introduce some special conditions that with them there is no nonnegative tridiagonal matrix in which  is its spectrum. in continue we present some conditions for existence such nonnegative tridiagonal matrices.

Existing elastic network models are typically parametrized at a given cutoff distance and often fail to properly predict the thermal fluctuation of many macromolecules that involve multiple characteristic length scales. We introduce a multiscale flexibility-rigidity index (mFRI) method to resolve this problem. The proposed mFRI utilizes two or three correlation kernels parametrized at different...

Matrix multiplication is a computationally-intensive and fundamental matrix operation in many algorithms used in scientific computations. It serves as the basic building block for many signal, image processing, graphics and robotic applications. To improve the performance of these applications, a high performance matrix multiplier is required. Traditionally, matrix multiplication operation is e...