In this paper we describe one of the possible application of recurrence plot strategy to the analysis of surface elctromyograms (sEMG). Recurrence quantification analysis (RQA) is an efficient time-series analysis tool pertaining to the class of non-linear dynamics time-domain processing. We analysed sEMG recorded during isometric contractions at constant and linearly varying force. In order to...

A technique (recurrence quantification analysis; RQA) for analyzing center of pressure (COP) signals is presented and applied to data obtained by having participants stand with the head forward or sideways and with eyes open or closed. RQA is suitable for short, nonstationary signals and quantifies dynamical (deterministic) structure and nonstationarity. Results indicated that vision affects th...

This paper presents a new method for automatically generating numerical invariants for imperative programs. Given a program, our procedure computes a binary input/output relation on program states which over-approximates the behaviour of the program. It is compositional in the sense that it operates by decomposing the program into parts, computing an abstract meaning of each part, and then comp...

This article explores the potential of emotional mimicry in identifying leader and follower students collaborative learning settings. Our data include video recorded interactions 24 high school who worked together groups three during a exam. A facial emotions recognition method was used to capture participants’ work. Cross-recurrence quantification analysis applied on detected see level directi...

In this chapter we will survey methods for comparison and description of sampled movement data, with focus on techniques able to capture the characteristics of the temporal evolution of the signals under study. Functional data analysis, the cross wavelet transform and cross recurrence analysis will be introduced and applied to the analysis of speech movement data.

The 3-dimensional coordinates of alpha-carbon atoms of proteins are used to distinguish the protein structural classes based on recurrence quantification analysis (RQA). We consider two independent variables from RQA of coordinates of alpha-carbon atoms, %determ1 and %determ2, which were defined by Webber et al. (2001). The variable %determ2 is used to define two new variables, %determ21 and %d...

Collective rituals are present in all known societies, but their function is a matter of long-standing debates. Field observations suggest that they may enhance social cohesion and that their effects are not limited to those actively performing but affect the audience as well. Here we show physiological effects of synchronized arousal in a Spanish fire-walking ritual, between active participant...