The theory of observers for linear, time-invariant systems is generalized to systems where some of the inputs are unmeasurable and statistically unknown. Criteria for the existance of such observers are developed and an example is presented.
Students' application of the concept of interdependence to the issue of preservation of species: Observations on the ability to generalize
โ Scribed by David H. Palmer
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 164 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0022-4308
No coin nor oath required. For personal study only.
โฆ Synopsis
One of the aims of science education is that students should be able to apply scientific principles to contemporary issues. Individual interviews were used to investigate the way in which students (63 12-year-olds and 60 16-year-olds) applied the ecological concept of interdependence of species to the issue of preservation of species. Students were shown a list of items representing a range of living things and were asked to select those which they would want to save from extinction and explain their reasoning. Although most students used the concept of interdependence for some items, they did not apply it in a scientifically consistent way to all types of living things. Three probable reasons for this lack of consistency were anthropocentricism, mixed reasons (students appeared to spontaneously choose another type of reason depending on what image the item immediately provoked), and opposite reasons (students interpreted the idea of interdependence as applying to some types of living things but not to others).
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