Predicting Autonomous Shuttle Acceptance in Older Drivers Based on Technology Readiness/Use/Barriers, Life Space, Driving Habits, and Cognition.

Shared autonomous vehicle services (i. e., automated shuttles, AS) are being deployed globally and may improve older adults (>65 years old) mobility, independence, and participation in the community.

BL-11C Micro-MX: a high-flux microfocus macromolecular-crystallography beamline for micrometre-sized protein crystals at Pohang Light Source II.

BL-11C, a new protein crystallography beamline, is an in-vacuum undulator-based microfocus beamline used for macromolecular crystallography at the Pohang Accelerator Laboratory and it was made available to users in June 2017. The beamline is energy tunable in the range 5.0-20 keV to support conventional single- and multi-wavelength anomalous-dispersion experiments against a wide range of heavy metals.

Structural and Electrical Properties of Solution Casted-BaTiO₃-Polyvinylidene Composite Layers.

Ceramic doped-polymer structures constitute a new area of functional materials, which are very promising because they combine hardness of ceramics with plasticity, low density, and high breaking strength of polymers. Piezoelectric composites are remarkable candidates for use in technical applications such as sensors and actuators, owing to their ability to integrate electrical and mechanical signals. Here, uniform ceramic-polymer composites (0-3 type) of tetragonal BaTiO₃ powder as a ceramic filler and polyvinylidene fluoride as a polymer matrix were prepared using solution casting.

Calcium Nitrate Tetra-Hydrate-Doped Polyvinylidene Fluoride Thin Films as Potential Devices for Pressure Sensors.

Calcium nitrate tetra-hydrate [Ca(NO₃)₂·4H₂O]-doped polyvinylidene fluoride (PVDF) thin films were successfully prepared by mixing 0.2-g-calcium nitrate into a PVDF solution under ultrasonification. The mixed solution was electrostatically spray coated onto aluminum foil substrates and then heat treated at 120 °C for 60 min in air.

Preparation and Optical Properties of Trivalent Erbium-Doped CaY₂O₄ Powders Under 980 nm Excitation.

Nanocrystalline CaY₂O₄:Er up-conversion phosphor was prepared by the sol-gel process. A homogeneous precursor sol was heated on a hot plate and then coagulated gel was prefired at 300 °C for 4 hr in Ar, followed by final annealing at 1,200 °C for 4 h in Ar. The crystallinity of the powders after annealing was confirmed using an X-ray diffraction analysis.

Preparation of -Phase Poly(vinylidene fluoride) Films on Aluminum Substrate with the Addition of Hydrated Metal Salts.

Poly(vinylidene fluoride) (PVDF) is one of the most studied polymers that exhibits piezoelectric and ferroelectric properties. PVDF crystallizes into four different forms, namely , , , and phases. Generally, the nonpolar phase, as a replacement for the polar phase with the most superior ferroelectric and piezoelectric properties, is formed from the precursor melt and solution.

Up-Conversion Photoluminescence of Sol-Gel Derived CaY₂O₄ Powders Under 980 nm Excitation.

Up-conversion is an anti-stokes process that can convert near-infrared light into visible light. Besides the requirement of high optical conversion efficiency, the thermochemical stability of the host materials is critical for in practical applications, and a stable oxide host material is optimal. CaY₂O₄ follows the same ordered structure of CaFe₂O₄, which is composed of an (R₂O₄) (R = rare earth metal) framework of double octahedral moieties with rare earth ions residing within the framework.

Epitaxially-Grown Europium-Doped Barium Titanate Films on Various Substrates for Red Emission.

Intense red photoluminescence under ultraviolet excitation was observed in epitaxially-grown europium-doped perovskite BaTiO3 thin films deposited on the SrTiO3 (100), MgO (100) and sapphire (0001) substrates using metal carboxylate complexes. Precursor films prepared by spin coating were pyrolyzed at 250 °C for 120 min in argon, followed by final annealing at 850 °C for 60 min in argon. Crystallinity and epitaxy of the films were analyzed by X-ray diffraction θ-2θ scan and pole-figure analysis.

Wide-angle catadioptric lens with a rectilinear projection scheme.

A catadioptric wide-angle lens having a rectilinear projection scheme has been developed with a view to possible applications in the security-surveillance area. The lens has been designed for a miniature camera with a video graphics array-grade 1/3 in. color CCD sensor.