Assur graphs are a tool originally developed by mechanical engineers to decompose mechanisms for simpler analysis and synthesis. Recent work has connected these graphs to strongly directed graphs, and decompositions of the pinned rigidity matrix. Many mechanisms have initial configurations which are symmetric, and other recent work has exploited the orbit matrix as a symmetry adapted form of th...

Leaf retention time increases with decreasing irradiance, providing an effective way of amortizing the costs of foliage construction over time. To elucidate the physiological mechanisms underlying this dependence, I studied needle life span, morphology, and concentrations of carbon, nitrogen and nonstructural carbohydrates along a gradient of relative irradiance in understory trees of Picea abi...

We review the construction of continuous wavelet transforms adapted to a given symmetry. Then we discuss in detail successively spatial wavelets, wavelets on the sphere and space-time wavelets. 1. HOW TO DEFINE AN ADAPTED WAVELET TRANSFORM? As it is well-known [1], wavelet analysis comes in two versions: the continuous one, used mostly for signal or image analysis, and the discrete one, origina...

Conventional automated peritoneal dialysis (APD) is prescribed as a repetition of the same dwell time and the same fill volume delivered by the cycler during the dialysis session. Nevertheless, it is well recognized that a cycle with a short dwell time and a small fill volume favors ultrafiltration (UF), while a cycle with a long dwell time and a large fill volume favors uremic toxin removal. T...

Active Appearance Models (AAMs) are able to align efficiently known faces under duress, when face pose and illumination are controlled. We propose Adapted Active Appearance Models to align unknown faces in unknown poses and illuminations. Our proposal is based on the one hand on a specific transformation of the active model texture in an oriented map, which changes the AAM normalization process...

ntroduction: In Mexico, there are two recorded living species of Cassiduloida: Cassidulus caribaearum and Rhyncholampas pacifica. Most the taxonomic studies on cassiduloids have used external morphology, pedicellariae morphometric characters; however, intraspecific variation quantitative qualitative characters has been poorly evaluated. Objective: To compare basic morphology R. pacifica C. cari...

BACKGROUND Campylobacter jejuni is a leading cause of bacterial enteritis worldwide. This microaerophilic bacterium can survive in aerobic environments, suggesting it has protective mechanisms against oxidative stress. The clinical C. jejuni Bf strain is characterized by an increased resistance to oxygen. This study aimed to characterize the behavior of the clinical C. jejuni Bf strain under an...