An Experimental Study of Instructor Immediacy in the Wimba Virtual Classroom

Purpose: This training programme aimed to improve the public speaking and presentation skills of the rural students. This experimental study sought to enhance the speaking skills and learning outcome of the students by bringing training modules, students and technology together. This paper highlights the challenges and findings of training rural students on “Public Speaking and Presentation Skills” and suggests some better ways for effective language teaching on online platform. Methodology/Approach/Design: The study is of an experimental design. The sample for the experimental study was chosen based on the requirements and interests of the learners. Entry level proficiency test and exit test were conducted for the participants of the training programme. The performances of the target students were video recorded and analysed. Comparison was made to assess the level of improvement found in the target group. Results: When students were taught the twenty strategies for public speaking, each learner came forward to present their speech but few students faced network issue which made their presentation not to sound good. During the exit test it is seen that there is a slight increase in the performance of the learners. In order to assure quality in E- learning platform there is a need for flexibility on the side of both learner and teacher. Practical Implications: The study presents practical implications for teachers. The results of the study might be of use for handling speaking lessons for students of rural areas. Originality/Value: From the trainers’ perspective, remote learning or virtual learning has become the current educational ultimatum. Teachers should be flexible to adapt virtual classroom than clinging on to the outdated methods used in a physical or traditional classroom.

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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