Krishnan L, Hoying JB, Nguyen H, Song H, Weiss JA. Interaction of angiogenic microvessels with the extracellular matrix. Am J Physiol Heart Circ Physiol 293: H3650–H3658, 2007. First published October 12, 2007; doi:10.1152/ajpheart.00772.2007.—The extracellular matrix (ECM) plays a critical role in angiogenesis by providing biochemical and positional cues, as well as by mechanically influencing...

Associative memories are conventionally used to represent data with very simple structure: sets of pairs of vectors. This paper describes a method for representing more complex com-positional structure in distributed representations. The method uses circular convolution to associate items, which are represented by vectors. Arbitrary variable bindings, short sequences of various lengths, simple ...

Advances in animal tracking technologies have reduced but not eliminated positional error. While aware of such inherent error, scientists often proceed with analyses that assume exact locations. The results of such analyses then represent one realization in a distribution of possible outcomes. Evaluating results within the context of that distribution can strengthen or weaken our confidence in ...

The present paper aims to test recent (Truly self-starting two sub-step method and three-parameter single-step implicit method) classical (Generalized-α, HHT-α, WBZ-α methods) time integration methods using the geometrically nonlinear Positional Finite Element Method (PFEM). numerical formulation is based on total Lagrangian approach uses Hessian matrix obtain response. mixed hardening inelasti...

Humans are accustomed to counting in a positional number system – decimal radix. Nearly all computer systems operate on another positional number system – binary radix. From the standpoint of representation, such positional systems are compact: given a radix b, one can represent b distinct numbers with n digits. Each choice of the digits di ∈ {0, . . . , b−1}, i = 0, . . . , n−1, results in a d...

Positional behavior is the measurable and observable link between the biology and behavior of an animal in its environment. In this dissertation, I examine ontogenetic patterns of positional behavior in infant, juvenile, and adult white-faced capuchins (Cebus capucinus) and mantled howling monkeys (Alouatta palliata) inhabiting the same tropical forest in Costa Rica. During growth and developme...

A large number of scientific applications require computations that involve operations on sparse matrices. Due to irregularities induced by the diverse sparsity patterns, many operations on sparse matrices execute inefficiently on traditional scalar and vector architectures. In order to tackle this issue a scheme has been proposed [1] that alleviates the sparse matrix storage and computation ov...

A nice feature for a type of models for relations is the possibility to assign to each relation a unique, natural model. Such a model could be regarded as a canonical model for that relation. In this paper we will show that all relations without strict symmetry that can be modeled by positional models, have canonical positional models, but that for some other relations we have reasons to doubt ...