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Conductor Temperature Estimation and Prediction at Thermal Transient State in Dynamic Line Rating Application
(Institute of Electrical and Electronics Engineers, 2018-10)
The traditional methodology for defining the ampacity of overhead lines is based on conservative criteria regarding the operating conditions of the line, leading to the so-called static line rating. Although this procedure ...
Extended tachyon field, Chaplygin gas, and solvable k-essence cosmologies
(American Physical Society, 2004-12)
We investigate a flat Friedmann-Robertson-Walker spacetime filled with k essence and find the set of functions F that generate three different families of extended tachyon fields and Chaplygin gases. They lead to accelerated ...
Transformer Thermal Capacity Estimation and Prediction Using Dynamic Rating Monitoring
(Institute of Electrical and Electronics Engineers, 2019-08)
Dynamic rating monitoring is a solution to face challenges in both the operation and the planning of power systems. With thermal monitoring, dynamic overloads of transformers are allowed; however, the thermal model used ...
Non-adiabatic Excited-State Molecular Dynamics: Theory and Applications for Modeling Photophysics in Extended Molecular Materials
(American Chemical Society, 2020-02)
Optically active molecular materials, such as organic conjugated polymers and biological systems, are characterized by strong coupling between electronic and vibrational degrees of freedom. Typically, simulations must go ...
Dynamic Coefficients of Finite Length Journal Bearing. Evaluation Using a Regular Perturbation Method
(Pergamon-Elsevier Science Ltd, 2019-02)
A set of simple expressions is deduced for static and dynamic parameters associated to hydrodynamic journal bearings (JB). The behavior of this system is governed by two dimensionless numbers, the aspect ratio, L/D, and ...
Insensitivity of spin dynamics to the orbital angular momentum transferred from twisted light to extended semiconductors
(American Physical Society, 2015-09)
We study the spin dynamics of carriers due to the Rashba interaction in semiconductor quantum disks and wells after excitation with light with orbital angular momentum. We find that although twisted light transfers orbital ...