Van Fasenmodel Naar Oefeningstypologie

1984 ◽  
Vol 18 ◽  
pp. 18-33
Author(s):  
Erik Kwakernaak

A phase model is a cycle of phases, which can be recognised in most FL lessons and course books. Each phase is in fact a collection of learning activities, which we consider to be distinctly different from other collections of learning activities. Phase models have a descriptive function: they describe stereotypical patterns in FL course books and lessons. They also have a prescriptive function, in so far as they are presented as exemplary patterns or schemes that will lead to better learning results. Prescriptive models are attractive to students, teachers and course book writers, because they give guidance in planning instructional units and lessons, but they are also risky, because they must largely be based on assumptions about de FL acquisition process, the conclusions of research on this subject being far from definitive. Further discussion of prescriptive phase models is necessary. Existing phase models lack precision of definition and plausibility of the underlying FL acquisition theory. The phase model of Strauss (in Kwakernaaks description) is criticized, especially the part of it that concerns the receptive skills. It is questionable whether phase models are appropriate for use in pre- and in-service teacher training, since students tend to adhere too closely to models, particularly where the "prescribed" order of the phases is concerned. Exercise typologies render the same service as phase models, inasmuch as they distinguish categories of learning activities without being too prescriptive. Two German exercise typologies are briefly discussed and a few suggestions for their improvement are made. 1) English (revised and expanded) edition of one of them: Christopher N. Chandlin: The Communicative Teaching of English. Principles and Exercise Typology, Longman, Burned Mill, Harlow, Essex 1981.

2019 ◽  
Vol 622 ◽  
pp. A185 ◽  
Author(s):  
Yao Wang ◽  
Qiang Chang ◽  
Hongchi Wang

Context. Abundant carbon-chain species have been observed towards lukewarm corinos L1527, B228, and L483. These carbon-chain species are believed to be synthesized in the gas phase after CH4 desorbs from the dust grain surface at the temperature around 30 K. Aims. We investigate carbon-chain species formation in lukewarm corinos using a more rigorous numerical method and advanced surface chemical models. We also pay attention to the significance of the finite size effect. Methods. We used the macroscopic Monte Carlo method in our simulations. In addition to the two-phase model, the basic multi-phase model and the new multi-phase models were used for modelling surface chemistry on dust grains. All volatile species can sublime at their sublimation temperatures in the two-phase model while most volatile species are frozen in the ice mantle before water ice sublimes in the basic and the new multi-phase models. The new multi-phase models allow more volatile species to sublime at their sublimation temperatures than the basic multi-phase model does. Results. The significance of the finite size effect is dependent on the duration of the cold phase. The discrepancies between the rate equation approach and the Monte Carlo method decrease as the duration of the cold phase increases. When T ~ 30 K, the abundances of gaseous CH4 and CO in the two-phase model are the highest while the basic multi-phase model predicts the lowest CO and CH4 abundances among all models. The abundances of carbon-chain species in the basic and the new multi-phase models are lower than that in the two-phase model when T ~ 30 K because CH4 is crucial for the synthesis of carbon-chain species. However, because the abundance of electrons increases as the abundance of H3O+ decreases, some carbon-chain species abundances predicted by the basic multi-phase model may not be lower than that in the new multi-phase models. The two-phase model performs best in predicting carbon-chain species abundances to fit observations while the basic multi-phase model works the worst. The abundances of carbon-chain species predicted by the new multi-phase models agree reasonably well with observations. Conclusions. The amount of CH4 can diffuse inside the ice mantle, thus sublime upon warm-up plays a crucial role in the synthesis of carbon-chain species in the gas phase. The carbon-chain species observed in lukewarm corinos may be able to gauge surface chemical models.


2018 ◽  
Vol 105 (1) ◽  
pp. 60-73
Author(s):  
Melissa Jane Hannah Mantle

Student teachers in England are expected to learn from experience in order to become reflective practitioners and to achieve Qualified Teacher Status. This study is a qualitative project studying whether and how different reflective learning activities introduced into a postgraduate teacher training programme promote reflection and increase the capacity to learn. It takes an interpretative approach, generating qualitative data on the reflection of students and the most effective learning methods. The study took place over a one-year period in one teacher training institution. The data arose from Post Graduate Certificate of Education student teacher responses to different reflective learning activities and subsequent interviews followed by an evaluation of the effectiveness of the overall learning strategy. Of the four activities used to promote reflective learning (discussion groups, action learning sets, journals and interviews), the action learning sets had the most impact on the student teachers’ ability to reflect. The implication for initial teacher training programmes is that providers need to recognise the importance of oral reflection within a communal setting.


2021 ◽  
Vol 5 (5) ◽  
pp. 1339
Author(s):  
Ulu Emanuel

This study aimed to determine whether the supervision activities by supervisors in Subject Teacher Organization (or MGMP) could improve teachers' abilities to implement the active, creative, effective, and fun learning (or PAKEM). To obtain the data needed, this study involved 34 teachers of SMA Negeri 1 Tasifeto Barat and was carried out in three months, starting from 18 August 2019 to 13 October 2019. The results of this study indicated that the teachers’ ability to prepare PAKEM model increased after coaching was carried out by supervisors in the MGMP. The increase was proved by an increase in the average percentage of lesson plan (RPP) preparation, that was 61.19% in cycle I and 67.77% in cycle II as well as the teachers’ ability to compile learning scenarios and components in designing classroom management by determining the types of learning activities that provided opportunities to involve students with detailed and challenging steps for improvement. Therefore, it was suggested that supervisors and school principals took the advantage of the school MGMP forum as a target for teacher training to improve their quality of learning activities and teachers could actively participate in MGMP activities, as one of the forums for improving their quality.


Author(s):  
David Ouellette ◽  
C. Ozgur Colpan ◽  
Edgar Matida ◽  
Cynthia A. Cruickshank

A one-dimensional two-phase model has been developed for a direct methanol fuel cell (DMFC) and flowing electrolyte - direct methanol fuel cell (FE-DMFC). The model has been compared to experimental data found in literature and corresponds well. Using this model, the performance of the DMFC and FE-DMFC are evaluated and compared to one another as well as to their respective single phase models. It has been found that there is a substantial difference between a two-phase and single phase model. Furthermore, the FE-DMFC outperformed the DMFC when it came to methanol inlet concentrations and varying operating temperatures due to the FE-DMFC’s ability to reduce the methanol crossover.


Author(s):  
E. V. Borshcheva ◽  

We describe the implementation of a three-phase astrochemical model (gas + ice surface + bulk) based on the two-phase Presta code (gas + dust surface) and provide results for calculating the molecular cloud composition. The two- and three-phase models produce significantly different chemical compositions. In particular, CO ice abundance in the three-phase model shows good agreement with the observational data, unlike the two-phase model.


2010 ◽  
Vol 19 (04) ◽  
pp. 749-762 ◽  
Author(s):  
MICHELE BONNIN ◽  
FERNANDO CORINTO ◽  
MARCO GILLI

Phase models represent the ideal framework to investigate the synchronization of a nonlinear oscillator with an external forcing. While many researches focused the attention to their analysis, little work has been done about the reduction of a physical system to the corresponding phase model. In this paper we show how, resorting to averaging techniques, it is possible to obtain the phase model corresponding to a given set of state equations. As examples, we derive the phase equations and investigate the synchronization properties of two popular nonlinear oscillators.


2020 ◽  
Vol 20 (3) ◽  
pp. 271
Author(s):  
Nadia Al Wadry

Faculty development is necessary to improve and update teaching and learning methodologies. As such, a variety of learning activities have been designed to improve teaching competencies of individual teachers. The College of Medicine & Health Sciences at Sultan Qaboos University, Muscat, Oman, recognised the need for teacher training in order to bring faculty up-to-date in teaching and assessment methodologies. A programme of regular and one-time interventions consisting of short courses, workshops and a series of lectures was offered. Feedback from the participants and facilitators led to programme expansion and enhancement. This special contribution discusses the impact of the programme on faculty and the college.Keywords: Teacher Training; Medical Education; Oman.


1984 ◽  
Vol 18 ◽  
pp. 98-114
Author(s):  
E.G. Jacobs-Hessing ◽  
J.H.W. de Hondt

One of the objectives of teacher-training is that the student should be able to assess the results of educational research in terms of its relevance to classroom practice. In addition, he or she should be able to participate in research and material- or curriculum-development. In this paper we want to emphasize these two objectives, using as an example our research project An Explorative Investigation of Learner Characteristics Relevant to Material Development (for French). Our presentation includes A. Research questions: - Is it possible to get more insight into learner-characteristics which may be relevant to modern language teaching? - Does this insight result in criteria for developing communicative teaching materials (for French) which cater more for individual differences (cognitive as well as affective) between learners? Research methods: Some pupils of a first year mixed-ability group, selected by the Group Embedded Figures Test for Field- (in)dependency, carried out a set of language tasks. They were invited to "think aloud" while performing these tasks. The protocols obtained were analysed and a tentative identification, in terms of learner characteristics, was made of the typical behaviour of f.d. and f.i. pupils. Conclusions: Field(in)dependency seems to be a relevant learner characteristic for foreign language learning in schools. Some recommendations are made, particularly in the domain of orientation-activities. B. A discussion of the students' participation in this project. C. A description of the way in which this (and other) research project(s) have been integrated into our teacher-training courses.


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