0000000000554093
AUTHOR
Toni Pikkarainen
English
We propose a method that automatically describes teacher talk. The method allows us to describe and compare classroom lessons, as well as visualizing changes in teacher discourse throughout the course of a lesson. The proposed method uses a machine learning model to infer topics from school textbooks. Certain topics are related to different contents (e.g. kinematics, solar system, electricity), while others are related to different teaching functions (e.g. explanations, questions, numerical exercises). To describe teacher talk, the machine learning method measures the appearance of the inferred topics throughout each lesson. We apply the proposed method to a collection of transcripts from p…
Conceptual network of teachers' talk : Automatic analysis and quantitative measures
Educational field can take advantage of the improvements of Automatic Speech Recognition (ASR), since we can apply ASR algorithms in non-ideal conditions such as real classrooms. In the context of QuIP project, we used ASR systems to translate audio from teachers’ talk into text to study conceptual networks based on what the teacher says during his/her lecture, particularly the key concepts mentioned and their temporal co-occurrence. In the present study, quantitative metrics are provided, such as centrality measures and PageRank, which can be used to analyse the conceptual networks in a broaden way. With a case-study design, two teachers’ talk are described quantitatively and qualitatively…
Initialization of the JYFLTRAP system
The IGISOL facility has been moved into a new location at the acceleration laboratory of the University of Jyväskylä. The superconducting magnet that is part of the JYFLTRAP system has been re-energized. In this thesis a commissioning of the Penning trap apparatus JYFLTRAP is described. This involves a precise alignment of the structure of the trap along field lines of strong solenoid field. The alignment was completed successfully with a special alignment device. In addition, some improvements were done for the Penning traps and transfer line from RFQ cooler, and a buncher to the injection of Penning traps was built during this project. Jyväskylän yliopiston IGISOL-ryhmän laboratorio on mu…