Results 21 to 30 of about 68,552 (195)

Impact of other scalar fields on oscillons after hilltop inflation [PDF]

open access: yes, 2016
Oscillons are spatially localized and relatively stable field fluctuations which can form after inflation under suitable conditions. In order to reheat the universe, the fields which dominate the energy density after inflation have to couple to other ...
Antusch, Stefan, Orani, Stefano
core   +2 more sources

The Forward Kinematics of Rolling Contact of Spacelike Surfaces in Lorentzian 3-Space

open access: yesCumhuriyet Science Journal, 2018
In thispaper, we investigate the forward kinematics of spin-rolling motion withoutsliding of one spacelike surface on another spacelike surface along thespacelike contact trajectory curves of the surfaces in Lorentzian 3-space.
Mehmet Aydınalp   +2 more
doaj   +1 more source

Quasi Optimal Gait of a Biped Robot with a Rolling Knee Kinematic [PDF]

open access: yes, 2011
In this paper, we address the problem of optimization of trajectories for a new class of biped robot. The knees of this biped are similar as the anthropomorphic one and have a rolling contact between the femur and the tibia.
ABBA, Gabriel   +2 more
core   +5 more sources

Study on numerical simulation and mitigation of parametric rolling in a container ship under head waves

open access: yesBrodogradnja
To investigate the parametric rolling motion of container ships navigating in head seas, this study utilizes the unsteady RANS approach combined with dynamic overlapping grid technology to simulate parametric roll in a container ship under the coupled ...
Liu Liang   +7 more
doaj   +1 more source

Predicting Friction of Tapered Roller Bearings with Detailed Multi-Body Simulation Models

open access: yesLubricants, 2023
In the presented work, a parametric multibody simulation model is presented that is capable of predicting the friction torque and kinematics of tapered roller bearings.
Patrick Wingertszahn   +4 more
doaj   +1 more source

Cycloidal Paths in Physics

open access: yes, 2018
A popular classroom demonstration is to draw a cycloid on a blackboard with a piece of chalk inserted through a hole at a point P with radius r = R from the center of a wood disk of radius R that is rolling without slipping along the chalk tray of the ...
Johnston, David C.
core   +1 more source

Analysis of the coupling effect of water on deck and parametric rolling motion in regular waves

open access: yesZhongguo Jianchuan Yanjiu
ObjectivesParametric rolling and green water on deck are two critical nonlinear phenomena closely related to ship motion stability, particularly under severe sea conditions.
Jiarun ZHANG   +4 more
doaj   +1 more source

Operation of ULCS - real life

open access: yesInternational Journal of Naval Architecture and Ocean Engineering, 2014
: In this paper the real life operation of ULCS (Ultra Large Container Ships) is presented from the point of view of shipmasters. The paper provides interpretation of results of questionnaire filled by masters of large container ships during Tools for ...
Jasna Prpić-Oršić   +2 more
doaj   +1 more source

Experimental study on the asymmetric impact loads and hydroelastic responses of a very large container ship

open access: yesInternational Journal of Naval Architecture and Ocean Engineering, 2020
This paper presents an experimental investigation of asymmetric impact effects on hydroelastic responses. A 1:64 scaled segmented ship model with U-shape open cross-section backbone was newly designed to meet elastic similarity conditions of vertical ...
Yuan Lin   +3 more
doaj   +1 more source

Beauty is Attractive: Moduli Trapping at Enhanced Symmetry Points [PDF]

open access: yes, 2004
We study quantum effects on moduli dynamics arising from the production of particles which are light at special points in moduli space. The resulting forces trap the moduli at these points, which often exhibit enhanced symmetry. Moduli trapping occurs in
A. Linde   +44 more
core   +1 more source

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