Search results for "Balance"

Nonlinear nonviscous hydrodynamical models for charge transport in the framework of extended thermodynamic methods

2002

This paper develops a procedure, based on methods of extended thermodynamics, to design nonlinear hydrodynamical models for charge transport in metals or in semiconductors, neglecting viscous phenomena. Models obtained in this way allow the study of the motion of electric charges in the presence of arbitrary external electric fields and may be useful when one wishes to study phenomena in a neighborhood of a stationary nonequilibrium process: indeed, the drift velocity of the charge gas with respect to the crystal lattice is not regarded as a small parameter.

Universality in Fragmentation

1999

Fragmentation of a two-dimensional brittle solid by impact and ``explosion,'' and a fluid by ``explosion'' are all shown to become critical. The critical points appear at a nonzero impact velocity, and at infinite explosion duration, respectively. Within the critical regimes, the fragment-size distributions satisfy a scaling form qualitatively similar to that of the cluster-size distribution of percolation, but they belong to another universality class. Energy balance arguments give a correlation length exponent that is exactly one-half of its percolation value. A single crack dominates fragmentation in the slow-fracture limit, as expected.

Analysis of whispering gallery modes resonators: wave propagation and energy balance models

2021

Electromagnetic whispering gallery modes (WGM) are surface waves guided by the curvature of an interface. Microspheres, microdisks and microcylinders –as for example standard optical fibers– are high quality microresonators for the WGM. In fact, they can be regarded as compact and small ring resonators. Here, we present a comparison between wave propagation and energy balance models, stablishing the equivalence and discussing the basic characteristics of these two complementary approaches.

Analysis of oscillations in discontinuous Lurie systems via LPRS method

2019

We discuss advantages and limitations of the harmonic balance method and the locus of a perturbed relay system (LPRS) method in the problem of finding periodic oscillations. In this paper we present the results of using harmonic balance method and LPRS method while investigating a 3rd order dynamic system in Lurie form. In this system a symmetric periodic oscillation is found, while other two asymmetric periodic motions are not found using both methods.

Application of thermodynamics to driven systems

2007

Application of thermodynamics to driven systems is discussed. As particular examples, simple traffic flow models are considered. On a microscopic level, traffic flow is described by Bando's optimal velocity model in terms of accelerating and decelerating forces. It allows to introduce kinetic, potential, as well as total energy, which is the internal energy of the car system in view of thermodynamics. The latter is not conserved, although it has certain value in any of two possible stationary states corresponding either to fixed point or to limit cycle in the space of headways and velocities. On a mesoscopic level of description, the size n of car cluster is considered as a stochastic varia…

Transport coefficients of self-propelled particles: Reverse perturbations and transverse current correlations

2019

The reverse perturbation method [Phys. Rev. E 59, 4894 (1999)] for shearing simple liquids and measuring their viscosity is extended to the Vicsek model (VM) of active particles [Phys. Rev. Lett. 75, 1226 (1995)] and its metric-free version. The sheared systems exhibit a phenomenon that is similar to the skin effect of an alternating electric current: Momentum that is fed into the boundaries of a layer decays mostly exponentially toward the center of the layer. It is shown how two transport coefficients, i.e., the shear viscosity $\ensuremath{\nu}$ and the momentum amplification coefficient $\ensuremath{\lambda}$, can be obtained by fitting this decay with an analytical solution of the hydr…

M5_Microfluidics_for_CNT

2018

The features of the sorting junction. Pressure balancer helps to equilibrate the pressure difference created by the presence of a droplet. The transition from shallow to deep channel mediates the transition from free to confined regime. The droplets are separated in the sorting junction according to the flow rate ratio.

2018

Background: The relation between training load, especially internal load, and the recovery-stress state is of central importance for avoiding negative adaptations in high-performance sports like swimming. The aim of this study was to analyze the individual time-delayed linear effect relationship between training load and recovery-stress state with single case time series methods and to monitor the acute recovery-stress state of high-performance swimmers in an economical and multidimensional manner over a macro cycle. The Acute Recovery and Stress Scale (ARSS) was used for daily monitoring of the recovery-stress state. The methods session-RPE (sRPE) and acute:chronic workload-ratio (ACWR) we…

Available Defences for Defendants in the Provisional Measures in Europe: Between Theory and Practice

2014

The EU Enforcement Directive provides a set of provisional measures to be applied by a request of a right-holder of a particular object of intellectual property. Simultaneously, the EU Enforcement Directive envisages a set of defences for an alleged infringer in order to safeguard the balance of parties. This article discusses available defences for an alleged infringer in provisional measures as provided by the EU Member States when norms of the EU Enforcement Directive are transposed in conjuncture with the available court practice. Specifically, the present article focuses not only on the threshold of evidence to be presented by a plaintiff for application of provisional measures but als…

Available Defences in Provisional measures: Between the Enforcement Directive and National law

2015

AbstractThe EU Enforcement Directive provides a set of provisional measures to be applied upon request from a right-holder of a particular object of intellectual property. Simultaneously, the EU Enforcement Directive envisages a set of defences for an alleged infringer (defendant) in order to safeguard the balance of the parties. This article discusses available defences for an alleged infringer in the provisional measures as provided by the EU Member States when the norms of the EU Enforcement Directive are transposed. Specifically, the present article not only focuses on the threshold of evidence to be presented by a plaintiff for the application of provisional measures, but also in regar…