Analysis of Teacher Talk on the Basis of Relevance Theory

Teacher talk is usually viewed as one of the decisive factors of success or failure in classroom teaching. Based on the basic principles of Relevance Theory, the present thesis has focused on the teacher-student interaction in form of question-answer in language classrooms and tried to analyze teacher talk under the framework of Relevance Theory to prove that Relevance Theory is able to provide an explanation for teacher talk. This thesis proposes some pedagogical implications for successful teacher talk and teacher-student interaction in EFL context. Keywords: teacher talk; teacher-student interaction; Relevance Theory Résumé: Le discours de l'enseignant est généralement considéré comme l'un des facteurs décisifs de succès ou d'échec dans l'enseignement en classe. Basée sur des principes élémentaires de théorie de la pertinence, la présente thèse a mis l'accent sur l'interaction enseignant-élève sous forme de question-réponse dans les cours de langue et tenté d'analyser les discours de l'enseignant dans le cadre de la théorie de la pertinence afin de prouver que la théorie de la pertinence est capable de fournir une explication pour le discours de l'enseignant. Cette thèse propose quelques implications pédagogiques pour les discours de l'enseignant et de l'interaction enseignant-élève réussis dans le contexte de EFL.Mots-clés: discours de l'enseignant; interaction enseignant-élève; théorie de la pertinenc

Role of quark-interchange processes in evolution of mesonic matter

We divide the cross section for a meson-meson reaction into three parts. The first part is for the quark-interchange process, the second for quark-antiquark annihilation processes and the third for resonant processes. Master rate equations are established to yield time dependence of fugacities of pions, rhos, kaons and vetor kaons. The equations include cross sections for inelastic scattering of pions, rhos, kaons and vector kaons. Cross sections for quark-interchange-induced reactions, that were obtained in a potential model, are parametrized for convenient use. The number densities of pion and rho (kaon and vector kaon) are altered by quark-interchange processes in equal magnitudes but opposite signs. The master rate equations combined with the hydrodynamic equations for longitudinal and transverse expansion are solved with many sets of initial meson fugacities. Quark-interchange processes are shown to be important in the contribution of the inelastic meson-meson scattering to evolution of mesonic matter.Comment: 28 pages, 1 figure, 8 table