Results 31 to 40 of about 89,519 (298)
Aortic annulus sizing using watershed transform and morphological approach for CT images [PDF]
, 2018 Aortic valve disease occurs due to calcification deposits on the area of leaflets within the human heart. It is progressive over time where it can affect the mechanism of the heart valve.
Mus’ab, Sahrim +2 more
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Myths and Realities Relating to Development of the Arterial Valves
Journal of Cardiovascular Development and Disease, 2014 There is considerable confusion as to how best describe the components of the arterial valves. It is hardly surprising, therefore, that similar uncertainties apply to concepts for their development. In this review, we describe the anatomy of the arterial
Robert H. Anderson +6 more
doaj +1 more source
Growth differences in different biotypes of the hybrid complex of Cobitis elongatoides × Cobitis tanaitica (Actinopterygii: Cypriniformes: Cobitidae) in the Okna River (Danube River basin), Slovakia [PDF]
Acta Ichthyologica et Piscatoria, 2017 Background. Many of Cobitis subpopulations exist as diploid–polyploid hybrid complexes where polyploid gynogenetic females act as “sperm parasites” of diploid individuals.
J. Fedorčák +3 more
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Study of the dynamics for gas accumulation in the annulus of production wells
Записки Горного института, 2021 Accumulation of associated petroleum gas in the annulus is one of the negative factors that impede the intensification of mechanized oil production. An increase in annular gas pressure causes growth of bottomhole pressure, a decrease in back pressure to ...
Kamil R. Urazakov +2 more
doaj +1 more source
Applied Sciences, 2020 Accurate measurement of pressure drop in energy sectors especially oil and gas exploration is a challenging and crucial parameter for optimization of the extraction process.
Abhishek Kumar +4 more
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Transient Dean flow in an annulus: a semi-analytical approach
Journal of Taibah University for Science, 2019 The mathematical model of a fully developed laminar transient flow formation between the gaps of two horizontally stationary concentric tubes forming concentric annulus due to the impact of sudden application of azimuthal pressure gradient is analysed ...
Basant Kumar Jha, Jibrin Danjuma Yahaya
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Fluids, 2022 The ability to predict critical heat flux (CHF) is of considerable interest for high-heat equipment, including nuclear reactors. CHF prediction from a mechanistic model for subcooled flow boiling in rod bundles still remains unsolved.
Wei Liu
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Note on the Annulus Conjecture [PDF]
Proceedings of the American Mathematical Society, 1967 We give here a partial solution of the annulus conjecture which includes all known partial solutions except those assuming a condition equivalent to the annulus conjecture. Lipschitz (or C'I2) manifolds and maps are defined in [4]. By a Lipschitz submanifold of a Euclidean space we mean a Cr submanifold in the sense of [3] with r = 2.
openaire +2 more sources
Energies, 2022 Subcooled flow boiling was experimentally investigated in a horizontal annulus with a temperature-controlled boiling surface and transparent outer pipe facilitating visualization.
Boštjan Zajec +2 more
doaj +1 more source
INVESTIGATION OF CRITICAL HEAT FLUX ON ABRADED INCONEL 625 TUBE
Acta Polytechnica CTU Proceedings, 2020 Aim of this work was to study flow boiling in an annular channel at low pressure and low flow on a tube with modified surface roughness. The tube with the outer diameter of 9.14 mm and the heated length of 380 mm was made of Inconel 625 and was manually ...
Ladislav Suk +3 more
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