Results 21 to 30 of about 3,246 (263)

Numerical Investigation of Global Ice Loads of Maneuvering Captive Motion in Ice Floe Fields

Journal of Marine Science and Engineering, 2023
During escort and convoy operations, icebreakers are often required to maneuver to open up channels or adjust routes due to the prevalence of ice floe conditions in Arctic routes. This study aimed to investigate the global ice load characteristics of the
Shenyu Xuan, Chengsheng Zhan, Zuyuan Liu, Baiwei Feng, Haichao Chang, Xiao Wei   +5 more
doaj   +1 more source

Numerical investigation of the effect of ocean depth variations on the dynamics of a ship mounted two-DoF manipulator system

Journal of Mechatronics, Electrical Power, and Vehicular Technology, 2022
The dynamics of a ship need to be considered in the development of a manipulator system that will be applied to the ocean-based operation. This paper aims to investigate the effect of ocean depth variations on the ship motion as disturbances to a ship ...
Mohamad Luthfi Ramadiansyah, Edwar Yazid, Cheng Yee Ng   +2 more
doaj   +1 more source

Numerical and Experimental Studies on Ship Motions Induced by Passing Ship [PDF]

Volume 7A: Ocean Engineering, 2018
To investigate the ability of numerical models to simulate the behavior of moored ships subjected by ship-wake waves, use is made of scale model tests where a ship model sails with constant speed along a straight path at a constant distance from an otherwise motionless ship.
Pedro, Francisco G., Santos, João Alfredo, Pinheiro, Liliana, Fortes, Conceição J., Hinostroza, Miguel   +4 more
openaire   +2 more sources

Numerical studies on non-linearity of added resistance and ship motions of KVLCC2 in short and long waves

International Journal of Naval Architecture and Ocean Engineering, 2019
In this study, numerical simulations for the prediction of added resistance for KVLCC2 with varying wave steepness are performed using a Computational Fluid Dynamics (CFD) method and a 3-D linear potential method, and then the non-linearities of added ...
Olgun Hizir, Mingyu Kim, Osman Turan, Alexander Day, Atilla Incecik, Yongwon Lee   +5 more
doaj   +1 more source

A Two‐Stage Questionnaire and Actigraphy Screening for iRBD in a Multicenter Retrospective Cohort

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Isolated rapid‐eye‐movement sleep behavior disorder is a prodromal marker of synucleinopathies. However, most cases remain undiagnosed due to the insufficient predictive value of questionnaires and limited access to confirmatory video‐polysomnography. We assessed a two‐stage screening strategy combining a brief questionnaire on rapid‐
Caleb A. Massimi, Giorgio Ricciardiello Mejia, Andre Metzger, Kang Hyun Ryu, Salonee Marwaha, Eva Grzegorczyk, Li Zhou, Eliana Jacobs, Boris Gilyadov, Claudia Kunney, Liqhwa Ncube, Ankit Parekh, Emmanuel Mignot, Fanny M. Elahi, Joseph Winer, Kathleen Poston, Andreas Brink‐Kjaer, Emmanuel H. During   +17 more
wiley   +1 more source

Research of Wind–Wave–Ship Coupled Effects on Ship Airwake and Helicopter Aerodynamic Characteristics

Journal of Marine Science and Engineering
The oceanic wind and waves, as well as the resultant ship motions, significantly impact the ship airwake and the operation of shipborne helicopters. A numerical method coupling wind, wave, ship and helicopter is developed using multiphase flow, in which ...
Kun Zong, Luyao Qi, Yongjie Shi, Wei Han, Shan Ma   +4 more
doaj   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

A comparison study of water impact and water exit models

International Journal of Naval Architecture and Ocean Engineering, 2014
: In problems of global hydroelastic ship response in severe seas including the whipping problem, we need to know the hydrodynamic forces acting on the ship hull during almost arbitrary ship motions.
Alexander Korobkin, Tatyana Khabakhpasheva, Sime Malenica, Yonghwan Kim   +3 more
doaj   +3 more sources

Dynamic Mechanical Loading Modulates Extracellular Vesicle Production and Cargo in Meniscus Fibrochondrocytes

Advanced Materials Interfaces, EarlyView.
Dynamic mechanical loading of outer meniscus fibrochondrocytes increases extracellular vesicle (EV) yield and alters EV composition. When applied to progenitor cells, these mechanically primed EVs modulate the expression of matrix‐related genes.
Catherine Cheung, Zizhao Li, Sung‐Han Jo, Se‐Hwan Lee, Il Keun Kwon, Jina Ko, Su Chin Heo   +6 more
wiley   +1 more source

CFD Investigation on Effect of Ship–Helicopter Coupling Motions on Aerodynamic Flow Field and Rotor Loads

Journal of Marine Science and Engineering
As critical assets for surveillance, reconnaissance, and transport, shipborne helicopters play an indispensable role in modern maritime operations. Ensuring the safety and stability of shipboard landings is therefore of paramount importance, particularly
Zhouyang Liu, Yang Liu, Yingnan Ma, Zhanyang Chen, Weidong Zhao   +4 more
doaj   +1 more source