| 1. |
- Simayijiang, Zhayida, et al.
(författare)
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An Automatic System for Acoustic Microphone Geometry Calibration based on Minimal Solvers
- 2016
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- In this paper, robust detection, tracking and geometry estimation methods are developed and combined into a system for estimating time-difference estimates, microphone localization and sound source movement. No assumptions on the 3D locations of the microphones and sound sources are made. The system is capable of tracking continuously moving sound sources in an reverberant environment. The multi-path components are explicitly tracked and used in the geometry estimation parts. The system is based on matching between pairs of channels using GCC-PHAT. Instead of taking a single maximum at each time instant from each such pair, we select the four strongest local maxima. This produce a set of hypothesis to work with in the subsequent steps, where consistency constraints between the channels and time-continuity constraints are exploited. In the paper it demonstrated how such detections can be used to estimate microphone positions, sound source movement and room geometry. The methods are tested and verified using real data from several reverberant environments. The evaluation demonstrated accuracy in the order of few millimeters.
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| 2. |
- Åström, I. Maria, 1965-, et al.
(författare)
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Integrated and subject-specific Science education : Teachers’ and students’ views
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- This study concerns the views of teachers’ and students’ regarding Science education. The teachers and students are all from four schools in the same small town in Sweden. The teachers’ views of Science lessons focused on how to plan lessons and organise content. The students’ views focused on three questions concerning the integration of science. The study is based on several data collections: interviews with and observations of teachers, a school survey and student questionnaires. The teacher interviews were analysed with regard to integrated and subject-specific Science education and the students’ questionnaires were analysed with statistical methods. The four schools in this study may be categorised as two integrated schools, one subject-specific and one mixed school. The students’ views of subjectspecific and integrated Science did not completely coincide with the teachers’ views. Teachers and students agreed on that they did integrated education in only one out of the four schools.
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| 3. |
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| 4. |
- Åström, Maria, 1965-, et al.
(författare)
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Integrated and subject-specific science education : teachers’ and students’ views
-
Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- This study concerns the views of teachers’ and students’ regarding Science education. The teachers and students are all from four schools in the same small town in Sweden. The teachers’ views of Science lessons focused on how to plan lessons and organise content. The students’ views focused on three questions concerning the integration of science. The study is based on several data collections: interviews with and observations of teachers, a school survey and student questionnaires. The teacher interviews were analysed with regard to integrated and subject-specific Science education and the students’ questionnaires were analysed with statistical methods. The four schools in this study may be categorised as two integrated schools, one subject-specific and one mixed school. The students’ views of subjectspecific and integrated Science did not completely coincide with the teachers’ views. Teachers and students agreed on that they did integrated education in only one out of the four schools.
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