The purpose of this paper is to study the dynamics of the interaction among a special class of solutions of the one-dimensional Camassa-Holm equation. The equation yields soliton solutions whose identity is preserved through nonlinear interactions. These solutions are characterized by a discontinuity at the peak in the wave shape and are thus called peakon solutions. We apply a particle method ...

A class of generally nonlinear dynamical systems is considered, for which the Lagrangian is represented as a sum of homogeneous functions of the displacements and their derivatives. It is shown that an energy partition as a single relation follows directly from the Euler-Lagrange equation in its general form. The partition is defined solely by the homogeneity orders. If the potential energy is ...

We present a comprehensive approach to address three challenging problems in face recognition: modelling faces across multi-views, extracting the nonlinear discriminating features, and recognising moving faces dynamically in image sequences. A multi-view dynamic face model is designed to extract the shape-and-pose-free facial texture patterns. Kernel discriminant analysis, which employs the ker...

this paper presents a mathematical model for the vibration analysis of a three-component piezoelectric force sensor. the cubic theory of weakly nonlinear electroelasticity is applied to the model for describing the electromechanical coupling effect in the piezoelectric sensing elements which operate in thickness-shear and thickness-stretch vibration modes. hamilton's principle is used to d...

the article provides a critical assessment of the more recent literature that relies on theoretical frameworks such as post modernism and globalization to deal with national identity, ethnicity and cultural mobility. explaining sensitive and complicated issues such as identity requires the extensive use of the native historical, cultural and sociological sources related to the iranian experienc...

this investigation postulatesvygotsky’s (1978) concept of zone of proximal development (zpd) and his related “scaffolding” metaphor as well as norton’s (2006) principles of sociocultural identity as its theoretical foundation.thisresearchintends to scrutinizethe socioculturally-oriented mediationalmechanisms utilized in student-student and student-teacher collaborationsin an iranian efl writing...

identity orientations refer to the relative importance that individuals place on various identity attributes or characteristics such as race, religion, culture and language when constructing their self-definitions (chew, 2007; cheek, 1989). accordingly, the present study aims at identifying the impact of identity aspects on the iranian learners' english language achievements at shiraz universit...

the present study was aimed at examining concerns about the social effects of efl learning, a challenging area of research which has not been discussed sufficiently. it tried to investigate the relationship between efl learning and national identity. in addition, attempt was made to find a relationship between language motivation types and national identity. furthermore, the role of two demogra...

The speech production system is capable of conveying an abundance of information with regards to sentence text, speaker identity, prosodics, as well as emotion and speaker stress. In an effort to better understand the mechanism of human voice communication, researchers have attempted to determine reliable acoustic indicators of stress using such speech production features as fundamental frequen...