4,442 research outputs found
Teaching Spoken English at Junior High School: A Comparison of TPR and PPP
This article reports on an experimental methods-comparison study, which was undertaken with beginner level junior high school students (aged 12 and 13) in Japan. The study aimed to investigate which type of teaching, Total Physical Response (TPR) or Present Practice Produce (PPP), was more effective in developing productive and receptive knowledge of a set of collocations. Results showed that both types of teaching had a significant impact upon the development of understanding and using the target language. However, there were no significant differences between the effectiveness of TPR and PPP, apart from a short-term benefit for PPP in terms of receptive knowledge. This shows that both types of teaching can have a positive impact upon learners of this age and level and that there is a need for further research to investigate the effectiveness of these communicative methodologies in this context
Axial anomaly and magnetism of nuclear and quark matter
We consider the response of the QCD ground state at finite baryon density to
a strong magnetic field B. We point out the dominant role played by the
coupling of neutral Goldstone bosons, such as pi^0, to the magnetic field via
the axial triangle anomaly. We show that, in vacuum, above a value of B ~
m_pi^2/e, a metastable object appears - the pi^0 domain wall. Because of the
axial anomaly, the wall carries a baryon number surface density proportional to
B. As a result, for B ~ 10^{19} G a stack of parallel pi^0 domain walls is
energetically more favorable than nuclear matter at the same density.
Similarly, at higher densities, somewhat weaker magnetic fields of order B ~
10^{17}-10^{18} G transform the color-superconducting ground state of QCD into
new phases containing stacks of axial isoscalar (eta or eta') domain walls. We
also show that a quark-matter state known as ``Goldstone current state,'' in
which a gradient of a Goldstone field is spontaneously generated, is
ferromagnetic due to the axial anomaly. We estimate the size of the fields
created by such a state in a typical neutron star to be of order
10^{14}-10^{15} G.Comment: 18 pages, v2: added a discussion of the energy cost of neutralizing
the domain wall charg
Using Supervision Mapping to Enrich School Counseling Fieldwork Supervision
Supervision mapping is a creative, visual approach to supervision wherein trainees identify concerns, strengths, goals, and ethical questions. While the supervision map has been identified as a potential tool for school counselors-in-training, no research has focused on its effectiveness. Therefore, this study sought to explore trainees’ experiences using the supervision map with faculty supervisors throughout their fieldwork experiences. The supervision map was used with school counseling trainees in two graduate practicum seminars in the Northeast (n=31). After using the supervision map for the duration of the seminar class, an electronic survey of their experience was administered, to which 23 trainees responded. Response frequencies, percentages, and qualitative feedback were analyzed to ascertain student perception of the supervision map. Results indicated favorable reactions to using this tool to help trainees develop reflective practices. Additionally, results suggest the benefit of using supervision maps may extend to the faculty supervisor, site supervisor, and group supervision process. Potential future uses for the supervision map are highlighted
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