Results 51 to 60 of about 5,367,272 (280)

Inverse boundary problems for intermediate springs on a rod with geometrical symmetry

Electronic Journal of Differential Equations, 2017
In this article we try to solve the inverse problem of determining the coefficients of stiffness of the intermediates on the springs on the rod from the two known natural frequencies.
Daulet B. Nurakhmetov, Serik A. Jumabayev, Almir A. Aniyarov   +2 more
doaj  

In-Process Monitoring of Changing Dynamics of a Thin-Walled Component During Milling Operation by Ball Shooter Excitation

Journal of Manufacturing and Materials Processing, 2020
During the milling of thin-walled workpieces, the natural frequencies might change radically due to the material removal. To avoid resonant spindle speeds and chatter vibration, a precise knowledge of the instantaneous modal parameters is necessary. Many
Daniel Bachrathy, Adam K. Kiss, Attila Kossa, Szabolcs Berezvai, David Hajdu, Gabor Stepan   +5 more
doaj   +1 more source

Tension Estimation Method for Cable With Damper Using Natural Frequencies and Two-Point Mode Shapes With Uncertain Modal Order

Frontiers in Built Environment, 2022
In the maintenance of cable structures, such as cable-stayed bridges, cable safety is assessed based on the cable tension. In Japan, the cable tension is generally estimated from the cable’s natural frequencies using the higher-order vibration method. In
Aiko Furukawa, Syuya Suzuki, Ryosuke Kobayashi   +2 more
doaj   +1 more source

Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry

FEBS Letters, EarlyView.
EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri, Ayaka Nagasato‐Ichikawa, Keita Iida, Shuhei Kimura, Akira Imamoto, Mariko Okada   +5 more
wiley   +1 more source

Structure and Properties of Doped with Nitrogen and Vanadium High-Carbon Steels

Механика машин, механизмов и материалов, 2015
Free planar and bending interfacial and boundary vibrations of semi-infinite composed plates and plate-strips are studied. Using the system of equations of the related classical theory of orthotropic plates, dispersion equations and asymptotic formulas ...
Petr A. Vityaz, Victor I. Zhornik, V.A. Kukareko, Sergei Ya. Shypitsyn, Evgeny I. Mosunov, Svetlana A. Kovaliova   +5 more
doaj  

Natural Frequencies of a Tethered Satellite System

Applied Sciences
This study investigated the natural frequencies of a tethered satellite system to enhance stability and operational reliability. Tethered satellite systems provide many advantages for space missions but exhibit inherently complex dynamics due to the ...
Yihun Yoon, Woojae Jang, Jintai Chung
doaj   +1 more source

Axisymmetric Natural Frequencies of Statically Loaded Annular Plates

Shock and Vibration, 2003
We present a numerical procedure to solve the axisymmetric vibration problem of statically loaded annular plates. We use the von Kármán nonlinear plate model to account for large deformations and study the effect of static deflections on the natural ...
Eihab M. Abdel-Rahman, Waleed F. Faris, Ali H. Nayfeh   +2 more
doaj   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Operational Modal Analysis of the Cablestayed Footbridge

Civil and Environmental Engineering, 2017
Modern architecture leads to design subtle bridge structures that are more sensitive to increased dynamic loading than the massive ones. This phenomenon can be especially observed on lightweight steel structures such as suspended footbridges. As a result,
Kortiš Ján, Daniel Ľuboš, Farbák Matúš, Maliar Lukáš, Škarupa Milan   +4 more
doaj   +1 more source

Multiple crack identification in stepped beam by measurements of natural frequencies

Vietnam Journal of Mechanics, 2014
A new approach is proposed for calculating natural frequencies and crack detection in a stepped cantilever beam with arbitrary number of cracks. This is based an explicit expression of the natural frequencies in term of crack parameter derived in the ...
Nguyen Tien Khiem, Duong The Hung, Vu Thi An Ninh   +2 more
doaj   +1 more source