Results 101 to 110 of about 3,936,282 (345)

Magnetic Interaction and X-Ray Absorption of the Magnetic Compact Stars [PDF]

Journal of Astronomy and Space Sciences, 1993
Using a simple analytic model based on the MHD stability arguments we obtain the size of the magnetosphere for the magnetic compact stars. We assume the ordered, fieldaligned flow in the magnetosphere and estimate the wellknown Alfven radius.
Yonggi Kim
doaj  

A comparative study on generalized model of anisotropic compact star satisfying the Karmarkar condition

European Physical Journal C: Particles and Fields, 2017
A new solution satisfying the Karmarkar condition is presented here. We were first to have discovered a hypergeometric function metric potential representing embedding class I spacetime.
Piyali Bhar, Ksh. Newton Singh, Nayan Sarkar, Farook Rahaman   +3 more
doaj   +1 more source

On the estimation of the real stability radius 1

IFAC Proceedings Volumes, 1999
Abstract Computationally efficient estimates for the real stability radius of a system matrix are developed for continuous and discrete time systems. The Frobenius norm is used instead of the operator norm and the estimates involve only the stability reserve of the system matrix and the eigenvalues of the Gram matrix of real and imaginary parts of ...
Stanislav V. Emelyanov, S. K. Korovin, Nikolai A. Bobylev, Alexander V. Bulatov, Phil Diamond   +4 more
openaire   +2 more sources

Analytic expression for Taylor-Couette stability boundary

, 1996
We analyze the mechanism that determines the boundary of stability in Taylor-Couette flow. By simple physical argument we derive an analytic expression to approximate the stability line for all radius ratios and all speed ratios, for co- and ...
Alexander Esser, Couette M. M., Mallock A., Siegfried Grossmann, Tagg R.   +4 more
core   +1 more source

Static and Dynamic Behavior of Novel Y‐Shaped Sandwich Beams Subjected to Compressive Loadings: Integration of Supervised Learning and Experimentation

Advanced Engineering Materials, EarlyView.
In this study, the mechanical response of Y‐shaped core sandwich beams under compressive loading is investigated, using deep feed‐forward neural networks (DFNNs) for predictive modeling. The DFNN model accurately captures stress–strain behavior, influenced by design parameters and loading rates.
Ali Khalvandi, Saeed Kamarian, Mahdi Bodaghi, Saeed Saber‐Samandari, Jung‐il Song   +4 more
wiley   +1 more source

Multi-Objective Optimization of Bogie Stability for Minimum Radius Curve of Battery Track Engineering Vehicle

Applied Sciences
A battery track engineering vehicle faces challenges such as derailment and other safety concerns when navigating an R20m minimum radius curve, primarily owing to its low vertical and horizontal stabilities.
Yang Shen, Jiayi Zhao, Chongyu Wang, Minggang Zhou   +3 more
doaj   +1 more source

Gravitational instability of simply rotating AdS black holes in higher dimensions

, 2009
We study the stability of AdS black hole holes rotating in a single two plane for tensor-type gravitational perturbations in $D > 6$ space-time dimensions. First, by an analytic method, we show that there exists no unstable mode when the magnitude $a$ of
A. A. Starobinsky, A. A. Starobinsky, Alexander Zhidenko, Hideo Kodama, J. Natario, J. M. Maldacena, K. Heun, R. A. Konoplya, R. Emparan   +8 more
core   +1 more source

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

Advanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian, Frédéric Demoly, Mohammad Lakhi, Bernard Rolfe, Mahdi Bodaghi   +4 more
wiley   +1 more source

Analytical approximations to the core radius and energy of magnetic vortex in thin ferromagnetic disks

, 2013
The energy of magnetic vortex core and its equilibrium radius in thin circular cylinder were first presented by N.A. Usov and S.E. Peschany in 1994. Yet, the magnetostatic function, entering the energy expression, is hard to evaluate and approximate.
Aharoni, Antos, Belavin, Bose, Doring, Gross, Guslienko, Kohn, Konstantin L. Metlov, Kosterlitz, Metlov, Metlov, Pribiag, Shinjo, Skyrme, Usov, Usov, Van Waeyenberge, Woo   +18 more
core   +1 more source

Consolidate Overview of Ribonucleic Acid Molecular Dynamics: From Molecular Movements to Material Innovations

Advanced Engineering Materials, EarlyView.
Molecular dynamics simulations are advancing the study of ribonucleic acid (RNA) and RNA‐conjugated molecules. These developments include improvements in force fields, long‐timescale dynamics, and coarse‐grained models, addressing limitations and refining methods.
Kanchan Yadav, Iksoo Jang, Jong Bum Lee
wiley   +1 more source