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Saw-tooth vertical saccades in progressive supranuclear palsy.
J Neurol
July 2023
Department of Neurology, Dizziness Center, Clinical Neuroscience Center, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, Republic of Korea.
Effects of Boride Orientation and Si Content on High-Temperature Oxidation Resistance of Directionally Solidified Fe-B Alloys.
Materials (Basel)
November 2022
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Article Synopsis
- * The microstructure of these alloys features well-oriented FeB columnar grains and α-Fe, with Si enhancing grain refinement and affecting oxidation characteristics.
- * The presence of Si leads to improved oxidation resistance, especially in alloys with a specific orientation, by forming a dense SiO thin layer that acts as a barrier against oxygen diffusion, enhancing overall anti-oxidation performance.
Saw-tooth refractive lenses are extremely well-suited to focus high energy X-rays (>50 keV). These lenses have properties of being continuously tunable (in energy or focal length), effectively parabolic, in-line, and attenuation-free on-axis. Vertical focusing of 60 keV synchrotron X-rays to 690 nm at a focal length f = 1.
View Article and Find Full Text PDFFocusing with saw-tooth refractive lenses at a high-energy X-ray beamline.
J Synchrotron Radiat
May 2020
Materials and Manufacturing Directorate, AFRL, Wright-Patterson AFB, OH, USA.
The Advanced Photon Source 1-ID beamline, operating in the 40-140 keV X-ray energy range, has successfully employed continuously tunable saw-tooth refractive lenses to routinely deliver beams focused in both one and two dimensions to experiments for over 15 years. The practical experience of implementing such lenses, made of silicon and aluminium, is presented, including their properties, control, alignment, and diagnostic methods, achieving ∼1 µm focusing (vertically). Ongoing development and prospects towards submicrometre focusing at these high energies are also mentioned.
View Article and Find Full Text PDFRestitution and Stability of Human Ventricular Action Potential at High and Variable Pacing Rate.
Biophys J
December 2019
University of Parma, Department of Chemistry, Life Sciences and Environmental Sustainability, Parma, Italy. Electronic address:
Despite the key role of beat-to-beat action potential (AP) variability in the onset of ventricular arrhythmias at high pacing rate, the knowledge of the involved dynamics and of effective prognostic parameters is largely incomplete. Electrical restitution (ER), the way AP duration (APD) senses changes in preceding cycle length (CL), has been used to monitor transition to arrhythmias. The use of standard ER (sER), though, is controversial, not always suitable for in vivo and only rarely for clinical applications.
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