Articles with "aperture" as a keyword



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Measurements of fetal dose with Mevion S250i proton therapy system with HYPERSCAN

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Published in 2023 at "Journal of Applied Clinical Medical Physics"

DOI: 10.1002/acm2.13957

Abstract: Abstract Purpose To characterize potential dose to the fetus for all modes of delivery (dynamic adaptive aperture, static adaptive aperture, and no adaptive aperture) for the Mevion S250i Proton Therapy System with HYPERSCAN and compare… read more here.

Keywords: system; aperture; proton therapy; mevion s250i ... See more keywords
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A filtering waveguide aperture antenna based on all‐resonator structures

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Published in 2023 at "Microwave and Optical Technology Letters"

DOI: 10.1002/mop.33706

Abstract: In recent years, there has been a large amount of attention focused on the design of filtering antennas to reduce the front‐end size of modern wireless communication systems. Although numerous design approaches are presented in… read more here.

Keywords: filtering waveguide; aperture; filtering antenna; antenna ... See more keywords
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A fast inverse direct aperture optimization algorithm for intensity‐modulated radiation therapy

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Published in 2019 at "Medical Physics"

DOI: 10.1002/mp.13368

Abstract: PURPOSE The goal of this work was to develop and evaluate a fast inverse direct aperture optimization (FIDAO) algorithm for IMRT treatment planning and plan adaptation. METHODS A previously proposed fluence map optimization algorithm called… read more here.

Keywords: aperture; direct aperture; optimization; optimization algorithm ... See more keywords
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Small Aperture Telescopes for the Simons Observatory

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Published in 2020 at "Journal of Low Temperature Physics"

DOI: 10.1007/s10909-020-02430-5

Abstract: The Simons Observatory (SO) is an upcoming cosmic microwave background (CMB) experiment located on Cerro Toco, Chile, that will map the microwave sky in temperature and polarization in six frequency bands spanning 27 to 285 GHz.… read more here.

Keywords: aperture; aperture telescopes; frequency; simons observatory ... See more keywords
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Error performance enhancement of satellite to earth FSO downlink employing hybrid subcarrier intensity modulation scheme with aperture averaging technique

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Published in 2019 at "Optical and Quantum Electronics"

DOI: 10.1007/s11082-019-1817-9

Abstract: In this work, we have evaluated the bit error rate (BER) of free space optical downlink using hybrid-subcarrier-intensity-modulation (hybrid-SIM) scheme. Also, we have employed the aperture averaging technique for the improvement of its error performance.… read more here.

Keywords: aperture; hybrid subcarrier; modulation; error performance ... See more keywords
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Effects of Magnetic and Electric Field Uniformity on Coded Aperture Imaging Quality in a Cycloidal Mass Analyzer

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Published in 2017 at "Journal of The American Society for Mass Spectrometry"

DOI: 10.1007/s13361-017-1827-4

Abstract: AbstractCycloidal mass analyzers are unique sector mass analyzers as they exhibit perfect double focusing, making them ideal for incorporating spatial aperture coding, which can increase the throughput of a mass analyzer without affecting the resolving… read more here.

Keywords: field; aperture; mass; cycloidal mass ... See more keywords
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Action strategies for walking through multiple, misaligned apertures.

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Published in 2018 at "Acta psychologica"

DOI: 10.1016/j.actpsy.2017.11.006

Abstract: When avoiding obstacles, path selection is thought to be determined by the attraction of the end-goal. However for aperture crossing, it is unclear whether the attraction point originates in the center of the aperture or… read more here.

Keywords: goal; aperture; multiple misaligned; end goal ... See more keywords
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Experimental investigation on boiling heat transfer enhanced by gradient aperture porous copper

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Published in 2021 at "Applied Thermal Engineering"

DOI: 10.1016/j.applthermaleng.2021.116877

Abstract: Abstract To ensure the working stability of electronics, highly-efficient heat dissipation technology such as pool boiling is attracting more and more attention. The three-dimensional porous surface used in pool boiling enhancement will be subject to… read more here.

Keywords: aperture; heat; gradient aperture; porous copper ... See more keywords
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Revealing the mechanisms of human face perception using dynamic apertures

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Published in 2017 at "Cognition"

DOI: 10.1016/j.cognition.2017.08.001

Abstract: Faces are notoriously hard to perceive when turned upside-down. It is often claimed that perceptual decrements reflect a qualitative switch from parallel whole-face processing, to a serial analysis of individual features. To test this view,… read more here.

Keywords: inverted faces; aperture; revealing mechanisms; holistic accounts ... See more keywords
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Coarsening of foam in two model fractures with different roughness

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Published in 2021 at "Colloids and Surfaces A: Physicochemical and Engineering Aspects"

DOI: 10.1016/j.colsurfa.2021.127666

Abstract: Abstract Foam coarsening by diffusion (Ostwald ripening) has been well studied in bulk foams. However, it is less well understood in porous media. In particular, the mechanisms that may slow or stop coarsening have not… read more here.

Keywords: two model; foam; aperture; model ... See more keywords
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Evolution of contact area and aperture during the shearing process of natural rock fractures

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Published in 2021 at "Engineering Geology"

DOI: 10.1016/j.enggeo.2021.106236

Abstract: Abstract The role of surface geometry and its evolution during shearing process on the hydromechanical behaviour of rock discontinuities has long remained an open question for geologist. During the shearing process, only a fraction of… read more here.

Keywords: shearing process; evolution contact; contact area; aperture ... See more keywords