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| http://dx.doi.org/10.1073/pnas.2420619121 | DOI Listing |
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Enhancing the efficiency of a wavelength-dispersive spectrometer based on a slitless design using a single-bounce monocapillary.
J Synchrotron Radiat
January 2025
Physikalisch-Technische Bundesanstalt, Abbestraße 2-12, Berlin, Germany.
This paper introduces a novel slit-less wavelength-dispersive spectrometer design that incorporates a single-bounce monocapillary with the goal of positioning the sample directly on the Rowland circle, thereby eliminating the need for a traditional entrance slit. This configuration enhances photon throughput while preserving energy resolution, demonstrated in comparative measurements on boron nitride and different lithium nickel manganese cobalt oxide cathodes. A common alternative to an entrance slit for limiting the source size on the Rowland circle is a customized design of the beamline involving a focusing optics unit consisting of two Kirkpatrick-Baez mirrors close to the end station.
View Article and Find Full Text PDFBouncing photons, underwater robots, and the ocean's green film.
Proc Natl Acad Sci U S A
November 2024
Department of Oceanography, University of Hawai'i at Mānoa, Honolulu, HI 96822.
Efficacy of a Novel Respiratory Motion Reduction Block in Reducing Motion Artifact on Myocardial Perfusion Single-Photon Emission Computed Tomography.
Cureus
May 2024
Department of Quantum Medical Technology, Kanazawa University, Kanazawa, JPN.
Purpose: Motion artifacts caused by heart motion during myocardial perfusion single-photon emission computed tomography (SPECT) can compromise image quality and diagnostic accuracy. This study aimed to evaluate the efficacy of the novel respiratory motion reduction block (RRB) device in reducing motion artifacts by compressing the hypochondrium and improving SPECT image quality.
Methods: In total, 91 patients who underwent myocardial perfusion SPECT with Tc-sestamibi were retrospectively analyzed.
Surveying the Directional Transport of Water Droplets upon Impact on Metallic Topographic Gradients.
ACS Appl Mater Interfaces
April 2024
Department of Physics, University of Otago, Dunedin, Otago 9016, New Zealand.
Drop impact phenomena on raw, polished, and topography-altered gradient surfaces are investigated and presented. The main aim of this study is to demonstrate that in using a one-step industrial patterning process, it is possible to obtain metal topographical wetting gradients that can produce various desired outcomes after droplet impact. The findings could be applied to improving wind or steam turbine blades.
View Article and Find Full Text PDFNon-line-of-sight (NLOS) imaging systems involve the measurement of an optical signal at a diffuse surface. A forward model encodes the physics of these measurements mathematically and can be inverted to generate a reconstruction of the hidden scene. Some existing NLOS imaging techniques rely on illuminating the diffuse surface and measuring the photon time of flight (ToF) of multi-bounce light paths.
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