Results 21 to 30 of about 67,668 (275)

Modeling and simulation of curved fibers in dry spinning scenarios

open access: yesResults in Applied Mathematics, 2019
Dry spinning is characterized by the simultaneous production of multiple thin polymeric fibers in airflows and the evaporation of the solvent contained in these fibers.
Manuel Wieland   +3 more
doaj   +1 more source

Increased efficiency of direct nanoimprinting on planar and curved bulk titanium through surface modification [PDF]

open access: yes, 2013
In this work the direct transfer of nanopatterns into titanium is demonstrated. The nanofeatures are imprinted at room temperature using diamond stamps in a single step.
Ali Z. Khokhar   +35 more
core   +1 more source

ASYMPTOTIC TRANSITION FROM COSSERAT ROD TO STRING MODELS FOR CURVED VISCOUS INERTIAL JETS [PDF]

open access: yesMathematical Models and Methods in Applied Sciences, 2011
This work deals with the modeling and simulation of slender viscous jets exposed to gravity and rotation, as they occur in rotational spinning processes. In terms of slender-body theory, we show the asymptotic reduction of a viscous Cosserat rod to a string system for vanishing slenderness parameter. We propose two string models, i.e.
Arne, W., Marheineke, N., Wegener, R.
openaire   +3 more sources

A model of a general elastic curved rod

open access: yesMathematical Methods in the Applied Sciences, 2002
AbstractWe indicate a new approach to the deformation of three‐dimensional curved rods with variable cross‐section. The model consists of a system of nine ordinary differential equations for which we prove existence and uniqueness via the coercivity of the association bilinear form.
Ignat, Anca   +2 more
openaire   +3 more sources

Mechanics and dynamics of translocating MreB filaments on curved membranes

open access: yeseLife, 2019
MreB is an actin homolog that is essential for coordinating the cell wall synthesis required for the rod shape of many bacteria. Previously we have shown that filaments of MreB bind to the curved membranes of bacteria and translocate in directions ...
Felix Wong, Ethan C Garner, Ariel Amir
doaj   +1 more source

Distinct cytoskeletal proteins define zones of enhanced cell wall synthesis in Helicobacter pylori

open access: yeseLife, 2020
Helical cell shape is necessary for efficient stomach colonization by Helicobacter pylori, but the molecular mechanisms for generating helical shape remain unclear. The helical centerline pitch and radius of wild-type H.
Jennifer A Taylor   +13 more
doaj   +1 more source

A New Top-Mounted Shear-Hinge Structure Based on Modal Theory and Rubber-Pad Damping Theory

open access: yesApplied Sciences, 2023
Steel-spring floating-slab tracks (SSFSTs) are widely used as efficient vibration-damping beds, and in China, they are mainly used in subways and municipal railroads.
He En, Yuelei He, Hongyao Lu, Anbin Wang
doaj   +1 more source

Abnormal photoreceptor outer segment development and early retinal degeneration in kif3a mutant zebrafish [PDF]

open access: yes, 2016
Photoreceptors are highly specialized sensory neurons that possess a modified primary cilium called the outer segment. Photoreceptor outer segment formation and maintenance require highly active protein transport via a process known as intraflagellar ...
Akhtar   +44 more
core   +2 more sources

4D rods: 3D structures via programmable 1D composite rods

open access: yesMaterials & Design, 2018
Slender 1D structures are ubiquitous in nature and engineering and serve as building blocks for 3D structures at scales ranging from molecular to architectural. 3D printing enables fabrication of such structures with geometrical complexity that cannot be
Zhen Ding   +3 more
doaj   +1 more source

Eccentric Wear Mechanism and Centralizer Layout Design in 3D Curved Wellbores

open access: yesApplied Sciences
In deep oil and gas wells, sucker rod strings (SRS) frequently experience breakage and eccentric wear problems. To address this engineering challenge, this study establishes a new coupled three-dimensional (3D) mechanical-mathematical model for sucker ...
Ziming Feng   +3 more
doaj   +1 more source

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