Abstract: This work was designed to investigate the simultaneous effect of both water-to-cement (W/C) and polymer-to-cement(P/C) ratios on flexural strength of type V Portland cement pastes containing polyvinyl alcohol. The obtained resultsconfirmed the strong effect of W/C-ratio on the effectiveness of the added polymer so that there exist optimum valuesfor both W/C and P/C-ratios. Pastes prep...

This volume, one of many in this series, is a compendium of technical information about techniques of laboratory analysis and preparation of complex carbohydrates. More than just a laboratory guide, it contains in addition to detailed methods critical information necessary to evaluate and understand those methods. Each section is written by a well-recognized authority in the field. As an exampl...

We study topological properties of attracting sets for automorphisms of Ck. Our main result is that a generic volume preserving automorphism has a hyperbolic fixed point with a dense stable manifold. We prove the same result for volume preserving maps tangent to the identity. On the other hand, we show that an attracting set can only contain a neighborhood of the fixed point if it is an attract...

Partial volume averaging (PVA) is present in nearly all practical imaging situations, medical imaging in particular. One method that has been used to account for the effects of PVA is the fuzzy c-means algorithm (FCM). We propose a new method for estimating the partial volume coefficient of each class at each voxel in a given image using a Bayesian statistical model. A prior probability on the ...

We introduce a new type of bounding-volume hierarchy, the c-oriented rotated-box tree, or c-rb-tree for short. A c-rb-tree uses boxes as bounding volumes, whose orientations come from a fixed set of predefined box orientations. We theoretically and experimentally compare our new c-rb-tree to two existing bounding-volumes hierarchies, namely c-dop-trees and box-trees.

The purpose of this study is to identify the effect of Ordinary Kriging (OK) and Inverse Distance Weighted (IDW) estimation methods for the delineation of mineralized zones based on subsurface data using concentration–volume (C–V) multifractal modeling in the Dardevey iron ore deposit, NE Iran. Variograms and anisotropic ellipsoid were generated for the Fe distribution by the above estimation m...

We prove that a divergence-free and C1-robustly transitive vector field has no singularities. Moreover, if the vector field is C4 then the linear Poincaré flow associated to it admits a dominated splitting over M . MSC 2000: primary 37D30, 37D25; secondary 37A99. keywords: Volume-preserving flows; Robust transitivity; Dominated splitting; Ergodicity.

This volume is the seventh in a series entitled "Biological Macromolecules" and the third of a subseries on subunits in biological systems. There are four articles in this volume: one by Nemethy on protein folding and allostery, a lengthy review of antibody structure and function by Cathou and Dorrington, a chapter by Sund, Markam, and Koberstein on glutamate dehydrogenase and a concluding arti...