The problem of integrating rotations and angular velocity from a known timeand space-dependent curvature is met in the dynamic analysis of non-linear spatial beams, if the numerical formulation is based on curvature, as in [1]. To avoid singularities and make the formulation more convenient, rotational quaternions q̂ are used for the parametrization of rotations. The relation between the curvatu...

A Steiner triple system of order v (briefly STS(v)) is 1-rotational under G if it admits G as an automorphism group acting sharply transitively on all but one point. The spectrum of values of v for which there exists a 1-rotational STS(v) under a cyclic, an abelian, or a dicyclic group, has been established in Phelps and Rosa (Discrete Math 33:57–66, 1981), Buratti (J Combin Des 9:215–226, 2001...

Rotablation (rotational atherectomy) is an acknowledged method of percutaneous treatment of highly calcified coronary artery lesions that cannot be treated with traditional angioplasty. The complexity of the technique and usage of very specific equipment can contribute to the development of uncommon complications. We present a case of percutaneous retrieval of a damaged rotational atherectomy b...

[This corrects the article DOI: 10.1371/journal.pone.0154234.].

In this study, an innovative methodology is proposed to characterize the short-term aging of asphalt binders using matrix analysis method. The rotational viscosity and complex shear modulus were chosen as target rheological properties for aging. A set square matrices was developed based on test temperatures synthetic additive wax content. Transformational obtained that trend process a function ...

The hypothesis that the cyanomethyl anion CH2CN is responsible for the relatively narrow diffuse interstellar band (DIB) at 8037.8± 0.15 Å is examined with reference to new observational data. The 00 absorption band arising from the B1 − X̃ 1A′ transition from the electronic ground state to the first dipole-bound state of the anion is calculated for a rotational temperature of 2.7 K using litera...

STUDY DESIGN Prospective clinical trial. OBJECTIVES To test the hypothesis that quantified trunk rotational strength training will equalize any strength asymmetry, increase strength overall, and stabilize adolescent idiopathic scoliosis. SUMMARY OF BACKGROUND DATA Bracing, the only generally accepted form of adolescent idiopathic scoliosis nonoperative therapy, has many shortcomings. Parasp...