Results 51 to 60 of about 909,795 (277)

Elliptical instability of compressible flow in ellipsoids [PDF]

, 2013
Elliptical instability is due to a parametric resonance of two inertial modes in a fluid velocity field with elliptical streamlines. This flow is a simple model of the motion in a tidally deformed, rotating body. Elliptical instability typically leads to
Clausen, N., Tilgner, A.
core   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Design of a New XY Flexure Micropositioning Stage With a Large Hollow Platform

Actuators, 2020
This paper presents the design of a new flexure-based xy micropositioning stage with a large hollow platform, which is suitable for practical use with a microscope.
Hanlun Zhang, Zehao Wu, Qingsong Xu
doaj   +1 more source

Two perturbation formulations of the nonlinear dynamics of a cable excited by a boundary motion

, 2020
A nonlinear cable excited by an inclined boundary motion, termed as cable's moving boundary problem, is attacked by two different perturbation approaches, i.e., the boundary modulation formulation and the quasi-static drift formulation.
Tieding Guo, G. Rega, Houjun Kang, Lianhua Wang   +3 more
semanticscholar   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Pinning down the ram-pressure-induced halt of star formation in the Virgo cluster spiral galaxy NGC 4388. A joint inversion of spectroscopic and photometric data

, 2010
In a galaxy cluster, the evolution of spiral galaxies depends on their cluster environment. Ram pressure due to the rapid motion of a spiral galaxy within the hot intracluster medium removes the galaxy's interstellar medium from the outer disk.
A. Boselli, A. Lançon, Alongi, Appenzeller, B. Vollmer, Bakos, Boissier, Bonnarel, Boselli, Bressan, Bruzual, C. Pappalardo, Calzetti, Cardelli, Cayatte, Chamaraux, Chung, Crowl, Dressler, Fagotto, Fagotto, Fouqué, Gil de Paz, Giovanelli, Girardi, Gunn, Hamuy, Kenney, Le Borgne, Martins, Morrissey, Ocvirk, Ocvirk, Oosterloo, P. Ocvirk, Perryman, Pilyugin, Quilis, Roediger, Roediger, S. Boissier, Schulz, Skrutskie, Solanes, Titterington, Tody, Veilleux, Veilleux, Vollmer, Vollmer, Warmels, Yasuda, Yoshida   +52 more
core   +3 more sources

Novel Rotational Motion Actuated Beam-type Multistable Metastructures

Materials & Design, 2022
This work aims to explore and design a family of multistable metastructures, which are actuated by rota- tional motion. The bi-stability design criteria for a single pre-shaped beam unit are studied firstly using an analytical model and finite element ...
D. Pan, Yulong Xu, Wenbing Li, Zhangming Wu   +3 more
semanticscholar   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

THE LOGARITHMIC SPIRAL AND ITS SPHERICAL COUNTERPART

Journal of Industrial Design and Engineering Graphics, 2019
Logarithmic spirals are isogonal trajectories of pencils of lines. From a series of geometric consequences, we pick out a few which are relevant for kinematics: When a logarithmic spiral rolls on a line, its asymptotic point traces a straight line. Hence,
Hellmuth STACHEL, Giorgio FIGLIOLINI, Jorge ANGELES   +2 more
doaj  

Profile generation using the filtering technique for the fast motion and smooth performance in the hardware level of autonomous system

IET Science, Measurement & Technology, 2023
This study addresses the challenge of motion control in autonomousvehicles through the introduction of a novel profile generation design. Specifically,autonomous vehicles often contend with uncertain factors and physicallimitations within their ...
Duc Khai Lam, Nhat Minh Ngo, Ha Quang Thinh Ngo   +2 more
doaj   +1 more source