Enhancement of dielectric constant of polyimide by doping with modified silicon dioxide@titanium carbide nanoparticles.

Electrode materials used in supercapacitors must have a high dielectric constant and a low dielectric loss along with good mechanical properties. In this study, the dielectric constant of polyimide (PI) was improved by preparing a PI/SiO@TiC composite. A homogeneous dispersion of SiO@TiC nanoparticles was obtained by the hydrolyzation of tetraethyl orthosilicate, which resulted in the formation of a thin layer of SiO on TiC particles.

Three-dimensional analysis of cervical spine segmental motion in rotation.

Introduction: The movements of the cervical spine during head rotation are too complicated to measure using conventional radiography or computed tomography (CT) techniques. In this study, we measure three-dimensional segmental motion of cervical spine rotation in vivo using a non-invasive measurement technique.

Material And Methods: Sixteen healthy volunteers underwent three-dimensional CT of the cervical spine during head rotation.

Biomechanical evaluation of a novel total cervical prosthesis in a single-level cervical subtotal corpectomy model: an in vitro human cadaveric study.

Background: Anterior cervical subtotal corpectomy and fusion provides extensive decompression in the treatment of cervical myelopathy. However, early adjacent segment degeneration may arise due to the abnormal kinematics. To the best of our knowledge, this is the first report on a newly-designed total cervical prosthesis (TCP) to preserve the normal kinematics of cervical spine.