Over recent decades language teaching and learning has undergone a redefinition of the subject and a rapid change in its methodology. Language programmes can now be delivered in technology‐based environments and communication at an international level can be a daily occurrence. This paper on the one hand analyses how these developments have extended and challenged the traditional roles and responsibilities of language teachers. On the other, it examines to what extent established models of language teacher education acknowledge and address the needs of language teachers today, in particular in relation to the integration of the intercultural dimension into language teaching and learning.
Au cours des récentes décennies l'enseignement–apprentissage des langues s'est vu redéfini et a connu une rapide évolution en matière de méthodologie. On peut aujourd'hui délivrer les cursus de langue par le moyen d'environnements technologiques, et il est devenu banal de communiquer internationalement de cette façon. Dans la présente étude nous cherchons d'une part à cerner les défis que présente cette évolution pour les rôles et responsabilités traditionnels des enseignants de langue. D'autre part nous demandons dans quelle mesure les modèles en vigueur en matière de formation des enseignants reconnaissent les nouveaux besoins de ceux‐ci, notamment en ce qui concerne l'intégration de la dimension interculturelle dans leur pratique.
Im Bereich Sprachenlehren und lernen haben sich in den letzten Jahrzehnten grundlegende Veränderungen ergeben, vor allem im Hinblick auf Methodologie. Sprachkurse können jetzt per Computer zu den Adressaten gebracht werden und Kommunikation über Grenzen hinweg wird potentiell zum alltäglichen Ereignis. Hier soll untersucht werden inwieweit diese Entwicklungen die traditionelle Rolle und den Verantwortungsbereich von Sprachenlehrer/innen erweitert und verändert haben. Darüberhinaus wird überprüft inwieweit die herkömmliche Ausbildung der Sprachenlehrer/innen den heutigen Anforderungen gerecht wird, vor allem im Hinblick auf die interkulturelle Dimension des Lehren und Lernens von Fremd‐ und Zweitsprachen.
En las últimas décadas la enseñanza y el aprendizaje de las lenguas ha pasado por una redefinición de su contenido y un rápido cambio en su metodología. Los programas de estudios se pueden realizar en entornos basados en las nuevas tecnologías y la comunicación a nivel internacional puede darse a diario. Este artículo de una parte analiza de qué manera estos cambios han ampliado y desafiado los papeles y las responsabilidades que los profesores de lenguas han tenido tradicionalmente. De otra parte, examina hasta qué punto los modelos que se han venido utilizando para la formación de profesores de idiomas reconocen y suplen sus necesidades en la actualidad, en particular en lo que se refiere a la integración de la dimensión intercultural en la enseñanza y el aprendizaje de las lenguas. 相似文献
A modular microfluidic airways model system that can simulate the changes in oxygen tension in different compartments of the cystic fibrosis (CF) airways was designed, developed, and tested. The fully reconfigurable system composed of modules with different functionalities: multichannel peristaltic pumps, bubble traps, gas exchange chip, and cell culture chambers. We have successfully applied this system for studying the antibiotic therapy of Pseudomonas aeruginosa, the bacteria mainly responsible for morbidity and mortality in cystic fibrosis, in different oxygen environments. Furthermore, we have mimicked the bacterial reinoculation of the aerobic compartments (lower respiratory tract) from the anaerobic compartments (cystic fibrosis sinuses) following an antibiotic treatment. This effect is hypothesised as the one on the main reasons for recurrent lung infections in cystic fibrosis patients. 相似文献
Reduced hepatic lactate elimination initiates blood lactate accumulation during incremental exercise. In this study, we wished to determine whether renal lactate elimination contributes to the initiation of blood lactate accumulation. The renal arterial-to-venous (a-v) lactate difference was determined in nine men during sodium lactate infusion to enhance the evaluation (0.5 mol x L(-1) at 16 ± 1 mL x min(-1); mean ± s) both at rest and during cycling exercise (heart rate 139 ± 5 beats x min(-1)). The renal release of erythropoietin was used to detect kidney tissue ischaemia. At rest, the a-v O(2) (CaO(2)-CvO(2)) and lactate concentration differences were 0.8 ± 0.2 and 0.02 ± 0.02 mmol x L(-1), respectively. During exercise, arterial lactate and CaO(2)-CvO(2) increased to 7.1 ± 1.1 and 2.6 ± 0.8 mmol x L(-1), respectively (P < 0.05), indicating a -70% reduction of renal blood flow with no significant change in the renal venous erythropoietin concentration (0.8 ± 1.4 U x L(-1)). The a-v lactate concentration difference increased to 0.5 ± 0.8 mmol x L(-1), indicating similar lactate elimination as at rest. In conclusion, a -70% reduction in renal blood flow does not provoke critical renal ischaemia, and renal lactate elimination is maintained. Thus, kidney lactate elimination is unlikely to contribute to the initial blood lactate accumulation during progressive exercise. 相似文献
The purpose of the current study was to investigate how combinations of different epoch durations and cut-points affect the estimations of sedentary time and physical activity in adolescents. Accelerometer data from 101 adolescents were derived and 30 combinations were used to estimate sedentary time, light, moderate, vigorous, and combined moderate-to-vigorous physical activity. Data were analyzed with repeated measurement analyses of variance. Large differences of sedentary time and times of different physical activity intensities were observed between 1 s and longer epoch durations using virtually all cut-points. Generally, sedentary time, moderate physical activity, vigorous physical activity, and combined moderate-to-vigorous physical activity progressively decreased, whereas light physical activity increased with longer epoch durations. The extreme differences between cut-points were large and increased with longer epoch durations for sedentary time and for all physical activity intensities except for vigorous physical activity per epoch duration. Caution is required when cross-comparing studies using different epoch durations and cut-points. To accurately register adolescents’ spontaneous intermittent physical activity behavior, short epoch durations are recommended. 相似文献
The effects of exercise on the core musculature have not been investigated in prepubescents. The main purpose of the present study was to determine the volume and degree of asymmetry of rectus abdominis, obliques and transversus abdominis, quadratus lumborum, iliopsoas, gluteus and paravertebralis muscles in prepubescent tennis players and in untrained boys. The muscle volume was determined using magnetic resonance imaging (MRI) in 7 male prepubescent tennis players and 10 untrained controls (mean age 11.0 ± 0.8 years, Tanner 1–2). After accounting for height and body weight as covariates, the tennis players had 14–34% greater volume than the controls in all the muscles analysed (P < 0.05) except in paravertebralis, dominant quadratus lumborum and non-dominant gluteus, which had similar volumes in both groups (P = NS). Compared to controls, the tennis players displayed a greater degree of asymmetry in quadratus lumborum and rectus abdominis (3% vs. 15%, P < 0.01 and 8% vs. 17%, P = 0.06, respectively). The level of asymmetry of obliques and transversus abdominis, iliopsoas, gluteus and paravertebralis muscles was similar in both groups (P = NS). In conclusion, tennis playing at prepubertal ages induces a selective hypertrophy of the core musculature and exaggerates the degree of asymmetry of quadratus lumborum and rectus abdominis compared to untrained boys. 相似文献
Theories of organisation actually become ideologies, legitimisations for certain forms of organisation. They deploy arguments in terms of rationality and efficiency to provide control. The limits that they impose upon the conception of organisations actually close down the possibility of considering alternative forms of organisation. This is nowhere more clearly evident than in the current application of management theories to schools. Such theories marginalise empirical studies of school practice and dismiss the folk‐knowledge’ of teachers as irrelevant. They are as significant for what they exclude as for what they include (Ball, 1987, p. 5). 相似文献
ABSTRACT: Two of the challenges in teaching Food Analysis are bringing relevance to the various chemical and physical analyses discussed and exposing students to the realities of quality assurance in the food industry. In a project to help meet those objectives, each student, with the assistance of a "resource person" from the food industry, completes the project as if he or she is responsible for the quality assurance analyses of a specific food product in a food company. The student identifies the chemical, physical, sensory, and microbial analyses for raw ingredients, in-process products, and the finished product. The project requires the student to participate in related class discussion, prepare a final written report, and make a brief class presentation. Analysis of survey data showed the project was more than moderately relevant or useful to former students working in the food industry, and related directly to the initial or current positions of most former students. 相似文献
