European Physical Journal C: Particles and Fields, 2017 The previously introduced class of two-parametric phenomenological inflationary models in general relativity in which the slow-roll assumption is replaced by the more general, constant-roll condition is generalized to the case of f(R) gravity.
Hayato Motohashi, Alexei A. Starobinsky
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Pilot-Scale Polysulfone Ultrafiltration Patterned Membranes: Phase-Inversion Parametric Optimization on a Roll-to-Roll Casting System [PDF]
MembranesThe scalability and processability of high-performance membranes remain significant challenges in membrane technology. This work focuses on optimizing the pilot-scale production of patterned polysulfone (PSf) ultrafiltration membranes using the spray ...
Ayesha Ilyas, Ivo F. J. Vankelecom
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Effect of Central Motor and Neuromuscular Impairments on Front Crawl Body Roll Characteristics of Para Swimmers [PDF]
Sports Medicine - OpenBackground Rotation of the trunk about its long axis or ‘body roll’ is essential for maximising front crawl swimming performance yet research on how physical impairment affects body roll is extremely limited. This study quantifies body roll kinematics in
Yu-Hsien Lee +4 more
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Nonlinear Container Ship Model for the Study of Parametric Roll Resonance [PDF]
Modeling, Identification and Control, 2007 Parametric roll is a critical phenomenon for ships, whose onset may cause roll oscillations up to +-40 degrees, leading to very dangerous situations and possibly capsizing.
Christian Holden +7 more
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Influence of Variable Acceleration on Parametric Roll Motion of a Container Ship [PDF]
Journal of Eta Maritime Science, 2016 Ship operators increase or decrease thrust force of ships to avoid parametric roll motion. These operations cause varying acceleration values. In this study, influence of variable acceleration and deceleration of ships on roll motion is investigated in ...
Emre PEŞMAN
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Study of the Influence of Nonlinear Moments upon Intensity of Parametric Roll
Journal of Marine Science and Engineering, 2022 Hydrodynamical analysis of the conditions for the occurrence of chaotic ship roll, leading in some cases to the capsizing of the vessel, showed that such conditions are most likely to occur in the zone of the main parametric resonance of the roll when ...
Victoria Semenova +3 more
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Examination of the virtues of parametric energy coupling in wave energy conversion
International Marine Energy Journal, 2022 Parametric resonance has been observed, both numerically and experimentally, in various studies of wave energy converters (WECs). Large heave motions induce a periodic variation in the metacentric height of a WEC body and, consequently, cause a harmonic
Bingyong Guo, John V. Ringwood
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Classification of Parametric Rolling for Seagoing Ships and Percentage Distribution for Multiple Sea State Parameters [PDF]
TransNav, 2022 In this paper, parametric rolling is divided into 5 heavy grades, establishing a classification for parametric rolling. This is achieved by a multi-parameter application in the simulations.
Sovanna Chhoeung, Axel Hahn
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Extreme Response Analysis of Parametric Roll of C11 Container Ship
Shanghai Jiaotong Daxue xuebao, 2021 Based on the narrow-band stochastic processes theory and Hermite transform, this paper proposed a method to study the extreme dynamic response of the parametric roll of ships.
ZHOU Xiaoyu, LI Hongxia, HUANG Yi
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Numerical calculation and mechanical mechanism analysis of ship parametric rolling
Zhongguo Jianchuan Yanjiu, 2020 [Objective] The parametric rolling is a special instability phenomenon of ship in the wave. The current research proves that the change of the stability parameter when the wave passes through the hull is the reason for the rolling motion of the hull,but ...
ZHU Jun +5 more
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