Results 81 to 90 of about 25,035 (360)
On Nonlinear Dynamics of the Pendulum with Periodically Varying Length [PDF]
, 2009 Dynamic behavior of a weightless rod with a point mass sliding along the rod axis according to periodic law is studied. This is the pendulum with periodically varying length which is also treated as a simple model of child's swing. Asymptotic expressions for boundaries of instability domains near resonance frequencies are derived.
arxiv +1 more source
Natural vibrations of curved nano-beams and nano-arches [PDF]
arXiv, 2021 The natural vibrations of curved nano-beams and nano-arches are studied. The nano-arches under consideration have piece-wise constant thickness; these are weakened with stable cracks located at-entrant corners of the steps. A method of determination of natural frequencies is developed making use of the method of weightless rotating spring.
arxiv
FEBS Letters, EarlyView.In lymphoid organs, antigen recognition and B cell receptor signaling rely on integrins and the cytoskeleton. Integrins act as mechanoreceptors, couple B cell receptor activation to cytoskeletal remodeling, and support immune synapse formation as well as antigen extraction.
Abhishek Pethe, Tanja Nicole Hartmann
wiley +1 more source
Frontiers in Physiology, 2018 Estimating the effect of microgravity/hypogravity on pulmonary ventilation function remains topical. Recently developed acoustic techniques based on the evaluation of the forced expiratory noise time (FETa) were hypothesized to be a promising tool for ...
Veronika V. Malaeva +6 more
doaj +1 more source
Molecular Oncology, EarlyView.The number of circulating tumor cells obtained from prostate cancer patients was increased approximately 5‐fold compared to regular CellSearch when processing 2 mL diagnostic leukapheresis material aliquots and increased by 44‐fold when processing 20 mL DLA aliquots using the flow enrichment target capture Halbach‐array.
Michiel Stevens +8 more
wiley +1 more source
Homoclinic, Subharmonic and Superharmonic Bifurcations for a Pendulum with Periodically Varying Length [PDF]
, 2012 Dynamic behavior of a weightless rod with a point mass sliding along the rod axis according to periodic law is studied. This is the simplest model of child's swing. Melnikov's analysis is carried out to find bifurcations of homoclinic, subharmonic oscillatory, and subharmonic rotational orbits.
arxiv +1 more source
Stratification and segregation under laminar convection [PDF]
arXiv, 2022 The paper is devoted to the study of the formation of stratification in an incompressible fluid due to convective laminar flows in horizontal layers heated from the side. Medium and intensive modes of stationary laminar thermal, concentrational and thermo-concentrational (in particular thermohaline) convection are considered, in which nonlinear flow ...
arxiv
Frontiers in Physiology, 2019 Motor imagery (MI) is arguably one of the most remarkable capacities of the human mind. There is now strong experimental evidence that MI contributes to substantial improvements in motor learning and performance.
Aymeric Guillot +2 more
doaj +1 more source
To crash or not to crash: how do hoverflies cope with free-fall situations and weightlessness?
Journal of Experimental Biology, 2016 Insects’ aptitude to perform hovering, automatic landing and tracking tasks involves accurately controlling their head and body roll and pitch movements, but how this attitude control depends on an internal estimation of gravity orientation is still an ...
Roman Goulard, J. Vercher, S. Viollet
semanticscholar +1 more source
Weightlessness simulation system and process [PDF]
, 1987 A weightlessness simulator has a chamber and a suit in the chamber. O-rings and valves hermetically seal the chamber. A vacuum pump connected to the chamber establishes a pressure in the chamber less than atmospheric pressure.
Vykukal, Hubert C.
core +1 more source