Results 31 to 40 of about 7,006 (279)

Nonlocal state-space strain gradient wave propagation of magneto thermo piezoelectric functionally graded nanobeam

Curved and Layered Structures, 2023
In this work, the state -space nonlocal strain gradient theory is used for the vibration analysis of magneto thermo piezoelectric functionally graded material (FGM) nanobeam.
Selvamani Rajendran, Loganathan Rubine, Dimitri Rossana, Tornabene Francesco   +3 more
doaj   +1 more source

New Hamiltonian formalism and quasi-local conservation equations of general relativity [PDF]

, 2004
I describe the Einstein's gravitation of 3+1 dimensional spacetimes using the (2,2) formalism without assuming isometries. In this formalism, quasi-local energy, linear momentum, and angular momentum are identified from the four Einstein's equations of ...
A. Ashtekar, A. Ashtekar, A. J. Chorin, B. Carter, B. D. Bramson, C. R. Prior, E. T. Newman, E. T. Newman, H. Bondi, J. H. Yoon, J. H. Yoon, Jong Hyuk Yoon, K. Kuchař, L. Hughston, L. C. Evans, L. D. Landau, P. T. Chruściel, R. Abraham, R. Geroch, R. Penrose, R. Wald   +20 more
core   +1 more source

Nonlocal State-Space Strain Gradient Approach to the Vibration of Piezoelectric Functionally Graded Nanobeam

Engineering Transactions, 2022
In this work, the state-space nonlocal strain gradient theory is used for the vibration analysis of piezoelectric functionally graded material (FGM) nanobeam.
Rajendran SELVAMANI, Rubine LOGANATHAN, Farzad EBRAHIMI   +2 more
doaj   +1 more source

Lagrangian Mechanics and Variational Integrators on Two-Spheres [PDF]

, 2007
Euler-Lagrange equations and variational integrators are developed for Lagrangian mechanical systems evolving on a product of two-spheres. The geometric structure of a product of two-spheres is carefully considered in order to obtain global equations of ...
Lee, Taeyoung, Leok, Melvin, McClamroch, N. Harris   +2 more
core   +2 more sources

Vibration Suppression Control of a Flexible Gantry Crane System with Varying Rope Length

Journal of Control Science and Engineering, 2019
The paper presents a control approach to a flexible gantry crane system. From Hamilton’s extended principle the equations of motion that characterized coupled transverse-transverse motions with varying rope length of the gantry is obtained. The equations
Tung Lam Nguyen, Trong Hieu Do, Hong Quang Nguyen   +2 more
doaj   +1 more source

Hamilton-Jacobi equations [PDF]

, 2015
Voce in ...
Cristiani, E.
  +6 more sources

Strings in Kerr-Newmann Black Holes [PDF]

, 1999
We study the evolution of strings in the equatorial plane of a Kerr-Newmann black hole. Writting the equations of motion and the constraints resulting from Hamilton's principle, three classes of exact solutions are presented, for a closed string ...
A. Kuiroukidis, A. L. Larsen, A. L. Larsen, C. W. Misner, D. B. Papadopoulos, D. B. Papadopoulos, H. Goldstein, H. J. de Vega, H. J. de Vega, H. J. de Vega, M. Green, P. I. Porfyriadis, S. Chandrasekhar, V. Frolov, V. Frolov   +14 more
core   +2 more sources

Invariante adiabático gerado por lenta variação de coordenada generalizada

Revista Brasileira de Ensino de Física
Apresentamos estudo de sistema mecânico em que uma coordenada generalizada está sujeita a lenta variação, realizado através de tratamento hamiltoniano no qual se permite a ação de força generalizada ao longo daquela coordenada, gerando o invariante ...
G.F. Leal Ferreira
doaj   +1 more source

GAD65 Antibody ELISA With Extended Reportable Range: Validation and Guidance for Neurological Practice

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To (1) validate GAD65‐ELISA detection and quantification for type 1 diabetes mellitus and autoimmune neurological diagnoses, (2) correlate ELISA results (reference range < 5 IU/mL) with established radioimmunoprecipitation assay (RIA; ≤ 0.02 nmol/L), and (3) define ELISA clinical utility and pitfalls.
Andrew McKeon, Dana Olofson, Diana Anissian, Divyanshu Dubey, Eoin P. Flanagan, Max C. Herman, Sarosh R. Irani, Daniel H. Lachance, Maria A. Willrich, Sean Pittock, John R. Mills, Anastasia Zekeridou   +11 more
wiley   +1 more source

The Effect of Residual Stress on the Electromechanical Behavior of Electrostatic Microactuators

Active and Passive Electronic Components, 2008
This work simulates the nonlinear electromechanical behavior of different electrostatic microactuators. It applies the differential quadrature method, Hamilton's principle, and Wilson-θ integration method to derive the equations of motion of ...
Ming-Hung Hsu
doaj   +1 more source