Formation of a Three-Phase Spiral Structure Due to Competitive Growth of a Peritectic Phase with a Metastable Eutectic
Sign Up to like & getrecommendations! Published in 2020 at "JOM"
DOI: 10.1007/s11837-020-04237-x
Abstract: Metastable spiral MgZn2/Zn eutectics grow in binary Zn-3 wt.% Mg alloys at small liquid undercooling. In this article, we report growth of a new class of three-phase spiral structures in metastable solidification of Ni-doped Zn-3Mg alloys.… read more here.
Keywords: phase; spiral structure; three phase; phase spiral ... See more keywords
Transient spiral structure and the disc velocity substructure in Gaia DR2
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2532
Abstract: The second data release from ESA's Gaia mission has revealed many ridge-like structures in the velocity distribution of the Milky Way. We show that these can arise naturally from winding transient spiral structure that is… read more here.
Keywords: winding spiral; spiral structure; velocity; transient spiral ... See more keywords
Spiral structure in barred galaxies. Observational constraints to spiral arm formation mechanisms
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2983
Abstract: A method, which we have developed for determining corotation radii, has allowed us to map in detail the radial resonant structures of barred spiral galaxies. Here, we have combined this information with new determinations of… read more here.
Keywords: pitch; pitch angle; bar strength; spiral structure ... See more keywords
Analysis of spiral structure in the accretion disc of the nova-like cataclysmic variable EC21178–5417
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz2839
Abstract: We present an extensive Doppler tomography study of the eclipsing nova-like EC21178–5417, which exhibits the classic accretion disc signature in the form of double-peak emission lines in its spectrum. Doppler tomograms confirm the presence of… read more here.
Keywords: accretion disc; spiral structure; nova like; ec21178 5417 ... See more keywords
On the Formation of Spiral Arms in Dwarf Galaxies
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DOI: 10.1134/s106377292112009x
Abstract: Spiral structure (both flocculent and Grand Design types) is very rarely observed in dwarf galaxies because the formation of spiral arms requires special conditions. In this work we analyze the sample of about 40 dS-galaxies… read more here.
Keywords: dwarf; spiral arms; spiral structure; dwarf galaxies ... See more keywords
Orthogonal spiral structures for energy harvesting applications: Theoretical and experimental analysis
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Intelligent Material Systems and Structures"
DOI: 10.1177/1045389x18754346
Abstract: The capture of energy from vibration of mechanical systems has been extensively studied with the goal of providing power for various microelectromechanical systems. The traditional cantilever beam approach was used as a starting design for… read more here.
Keywords: energy; spiral structure; orthogonal spiral; energy harvesting ... See more keywords
Threefold Spiral Structure Constructed by 1D Chains of [[M(NCS)2(bpa)2]·biphenyl]n (M = Fe, Co; bpa = 1,2-bis(4-pyridyl)ethane)
Sign Up to like & getrecommendations! Published in 2019 at "Crystals"
DOI: 10.3390/cryst9020097
Abstract: Assembled complexes [[M(NCS)2(bpa)2]·biphenyl]n (M = Fe, Co; bpa = 1,2-bis(4-pyridyl)ethane) have been synthesized because [Fe(NCBH3)2(bpa)2·biphenyl]n has a novel threefold spiral structure and shows stepwise spin-crossover phenomenon. We attempted to obtain spiral structures for [[Fe(NCS)2(bpa)2]·biphenyl]n and… read more here.
Keywords: ncs bpa; spiral structure; bpa; biphenyl ... See more keywords
A Funnel Type PVDF Underwater Energy Harvester with Spiral Structure Mounted on the Harvester Support
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DOI: 10.3390/mi13040579
Abstract: For the purpose of stably supplying electric power to the underwater wireless sensor, the energy harvesting technology in which a voltage is obtained by generating displacement in a piezoelectric material using flow-induced vibration is one… read more here.
Keywords: funnel type; flow velocity; energy; power ... See more keywords
Spiral Chiral Metamaterial Structure Shape for Optical Activity Improvements
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DOI: 10.3390/mi14061156
Abstract: We report on a spiral structure suitable for obtaining a large optical response. We constructed a structural mechanics model of the shape of the planar spiral structure when deformed and verified the effectiveness of the… read more here.
Keywords: metamaterial structure; structure; chiral metamaterial; spiral chiral ... See more keywords