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A influência do material didático na motivação de aprendizes da língua inglesa em contexto de ensino público
(Universidade Federal de São Carlos, 2007-09-12) Campos-Gonella, Cristiane Oliveira; Augusto-Navarro, Eliane Hercules; https://lattes.cnpq.br/5716027350340906
The aim of this work is to verify the motivation of students to study English in the beginning of their first year right after primary school (5Th grade in Brazil), as well as to analyze the influence of teaching materials adopted in the students motivational disposition. We have confirmed, through our analyses, the hypothesis that students are motivated in the beginning of the foreign language teaching and learning process and, based on authors such as Augusto-Navarro (2007), Barbirato (2005), Stipek (2002), Dörnyei (2001), Peacock (1997), Pintrich e Schunk (1996), Almeida Filho (1994), Viana (1990), Krashen e Terrell (1983), and others, we discuss some characteristics, which if guaranteed in the teaching material, may help the teacher to maintain students motivation. This study may contribute for a better comprehension of the frequent demotivation process observed among English language students in Brazilian public schools. It also presents the characteristics of highly motivating, as well as demotivating, EFL teaching activities.
Caracterização ótica de poços quânticos de GaMnAs
(Universidade Federal de São Carlos, 2007-09-12) Holgado, Danny Pilar Araucano; Gobato, Yara Galvão; https://lattes.cnpq.br/7558531056409406; https://lattes.cnpq.br/2035102451161467
In this work, we have studied GaAs/AlAs/Ga1-xMnxAs quantum wells (QWs) with low Mn concentration ( 0 < x < 0,2%). The samples were grown by Molecular Beam Epitaxy (MBE) in high temperature (450 C). The growth conditions were chosen to reduce the incorporation of As and interstitial Mn resulting in samples of good optical quality. We have studied samples growth in (311B) and (001) GaAs substrates with different manganese concentrations, x = 0.0%, 0.07%; 0.1%;. We have performed measurements of polarized resolved photoluminescence for magnetic field up to 15T in Faraday configuration. We determined the degree of circular polarization and the excitonic spin-splitting for the QW emission as function of magnetic field.