In this work, we call the attention to ambiguity found in literature when labeling vibrations and molecular orbitals as B1 B2 for molecules belonging C2v point group as, example, water molecule. A survey of several books some articles shows that comes from a long time ago persists today, being source misunderstanding waste students teachers. It means that, case groups Cnv, Dn, Dnh (n = 2, 4, 6)...

The medial axis of an image pattern is the loci of all inscribed disks that touch two or more boundary points without crossing any of the boundaries. The medial axis transform (MAT) is a powerful representation for objects with inherent symmetry or near-symmetry. The medial axis of 2-D image patterns provides a conceptual design base, with transition to a detailed design occurring when the radi...

Background: Low Back Pain (LBP) is one of the most prevalent problems associated with sport activities. The present study aimed to investigate the relationship between pain and plantar pressure variables. In addition, we compared these variables in male and female athletes with LBP. Methods: In this study, 47 participants with the age range of 18 to 25 years w...

Objective: Flexed posture students who had hyperkyphosis (HKP) and forward head posture (FHP) due to changes in the spine alignment leads to displacement of the center of pressure and increased postural sways which ultimately disrupts the distribution of foot pressure. Therefore, the aim of this study was to compare the effect of eight weeks of National Academy of Sports Medicine (NASM) and Sha...

Even though echinoderms are members of the Bilateria, the location of their anterior/posterior axis has remained enigmatic. Here we propose a novel solution to the problem employing three lines of evidence: the expression of a posterior class Hox gene in the coeloms of the nascent adult body plan within the larva; the anatomy of certain early fossil echinoderms; and finally the relation between...

It is numerically demonstrated by means of a magnetohydrodynamic code that precession can trigger dynamo action in a cylindrical container. Fixing the angle between the spin and the precession axis to be 1/2π, two limit configurations of the spinning axis are explored: either the symmetry axis of the cylinder is parallel to the spin axis (this configuration is henceforth referred to as the axia...