Curved aluminium extrusions are applied in a wide range of industrial applications. Because initially straight, an additional process is required to curve the product. Undesired wrinkling plate part at inner radius frequently observed during curving process. Wrinkling has already been extensively studied for rotary-draw bending This paper aims predicting conditions which hollow section can occu...

We study the response and cross sections for the absorption of GW energy generated in a Jordan-BransDicke theory by a resonant mass detector shaped as a hollow sphere. As a source of the GW we take a binary system in the Newtonian approximation. For masses of the stars of the order of the solar mass, the emitted GW sweeps a range of frequencies which include the first resonant mode of the detec...

Microtubules are hollow cylinders composed of tubulin heterodimers that stack into linear protofilaments that interact laterally to form the microtubule wall. Synchrotron x-ray diffraction of microtubules under increasing osmotic stress shows they transition to rectangular bundles with noncircular buckled cross sections, followed by hexagonally packed bundles. This new technique probes the stre...

We demonstrate an in-line polarization controller based on a hollow optical fiber filled with a nematic liquid crystal by fabricating thin-film electrodes on the cladding of a fiber. The polarization controller consists of three control sections with fixed optic axes, which operate as phase retarders. The phase retardation in each section is controlled by the magnitude of the applied electric f...

Abstract. Endoscopes provide real-time, high resolution video views of the interior of hollow organs and cavities that exist within the human body. Although endoscopic examinations are mostly non-invasive, the procedures still require some sedation or anesthesia to reduce patient discomfort. X-Ray Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) are non-invasive diagnostic imaging ...