Search results for "identity"
showing 10 items of 1751 documents
A gauge-technique Ansatz for the three gluon vertex of the background field method
2011
The vertex connecting one background gluon with two quantum ones constitutes a central ingredient in the gauge-invariant Schwinger-Dyson equation that determines the non-perturbative dynamics of the gluon propagator. This vertex satisfies a Ward identity with respect to the background gluon, and a Slavnov-Taylor identity with respect to the two quantum gluons. We present a complete Ansatz for this vertex, which satisfies both aforementioned identities. This entire construction depends crucially on a set of constraints relating the various form-factors of the ghost Green's functions appearing in the Slavnov-Taylor identity satisfied by the vertex. The validity of these constraints is demonst…
Do young readers have fast access to abstract lexical representations? Evidence from masked priming
2014
Although there is consensus that adult readers have fast access to abstract letter/word representations, the developmental trajectory of such access has not been mapped out yet. To examine whether developmental readers have rapid access to abstract representations during the early stages of word processing, we conducted a masked priming lexical decision experiment with two groups of young readers (third and fifth graders) and a group of young adults. We selected two types of words: (a) words composed of cross-case letters that are visually dissimilar (DIS words; e.g., arte/ARTE [Spanish for art]) and (b) words composed of cross-case letters that are visually similar (SIM words; e.g., vivo/V…
Learning at work : Researching personal development and competence building in work integration companies
2017
The context of our research is Work Integration Enterprises. These hire people who are emerging from processes of social exclusion for a period of between 6 months and three years. In these companies, people work while learning a trade and learning to work, in order to facilitate their entry into the ordinary labour market.Of the different academic approaches to processes of learning at work and training, we have chosen Michael Eraut's notion of learning trajectories to apply to our research. We have chosen it for its potential: it provides a longitudinal approach to learning, it takes into account technical, social and personal dimensions of learning, and it also develops a particular focu…
The link between vocational identity, study choice motivation and satisfaction with studies
2010
Abstract The study explores the link between student's vocational identity, motivation for their study choice, satisfaction with different aspects of studies and thoughts of leaving their studies. The following instruments were administered: 1) Questionnaire on satisfaction with different aspects of study process and student's future 2) My Vocational Situation (MVS, Holland, Daiger, Power, 1980); 3) Questionnaire of motivation for study choice. The study was conducted with 120 students at the Vidzeme's University of Applied Sciences in Latvia. The results show the correlation between the high level of student's vocational identity, intrinsic motivation for study choice and higher satisfacti…
Silent say, saying effective and discourse mask
2021
In communication, every speaker must choose meticulously the aptness in the word, the gesture, the smile, the look or even the silence. The being-speaker hides and beyond protects himself behind his discursive mask which provides him with a linguistic security. While many disciplines - social psychology, psychoanalysis and philosophy – have seized the notion of the mask in their frame of reference, this concept still remains absent today in the language sciences. However, the game of masks substitution is fundamental in language activity. This game is so usual that we do not even notice it anymore, except in situations where we are explicitly asked to make an effort to adapt to the rule of …
Design and Validation of the Brief Self Online Scale (SO-8) in Early Adolescence: An Exploratory Study
2020
For the Z-Generation, the Internet has become a very important experimentation laboratory for the discovery and validation of their identity. Despite the importance of the process of building the self in the adolescent, there are hardly any validated instruments that measure the self online. The aim of this research was to design and validate the Brief Self Online Scale (SO-8). A total of 843 students (384 boys, 45.6%), with an age range of 10 to 14 years participated. Confirmatory factor analysis (CFA) confirmed the hypothesized model of two correlated factors (Online Self-Perception and Online Idealized Projection), previously obtained through exploratory factor analysis (EFA). The relia…
The dynamical equation of the effective gluon mass
2011
In this article we derive the integral equation that controls the momentum dependence of the effective gluon mass in the Landau gauge. This is accomplished by means of a well-defined separation of the corresponding "one-loop dressed" Schwinger-Dyson equation into two distinct contributions, one associated with the mass and one with the standard kinetic part of the gluon. The entire construction relies on the existence of a longitudinally coupled vertex of nonperturbative origin, which enforces gauge invariance in the presence of a dynamical mass. The specific structure of the resulting mass equation, supplemented by the additional requirement of a positive-definite gluon mass, imposes a rat…
Chiral symmetry andπ-πscattering in the covariant spectator theory
2014
The π-π scattering amplitude calculated with a model for the quark-antiquark interaction in the framework of the Covariant Spectator Theory (CST) is shown to satisfy the Adler zero constraint imposed by chiral symmetry. The CST formalism is established in Minkowski space and our calculations are performed in momentum space. We prove that the axial-vector Ward-Takahashi identity is satisfied by our model. Then we show that, similarly to what happens within the Bethe-Salpeter formalism, application of the axial-vector Ward Takahashi identity to the CST π-π scattering amplitude allows us to sum the intermediate quark-quark interactions to all orders. Thus, the Adler self-consistency zero for π…