Photomatrix computer interface : on line registration of optical configurations for visual pattern recognition

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Towards the architecture of an instructional multimedia database

The applicability of multimedia databases in education may be extended if they can serve multiple target groups, leading to affordable costs per unit for the user. In this contribution, an approach is described to build generic multimedia databases to serve that purpose. This approach is elaborated within the ODB Project ('Instructional Design of an Optical DataBase'); the term optical refers to the use of optical storage media to hold the audiovisual components. The project aims at developing a database in which a hypermedia encyclopedia is combined with instructional multimedia applications for different target groups at different educational levels. The architecture of the Optical Database will allow for switching between application types while working (for instance from tutorial instruction via the encyclopedia to a simulation and back). For instruction, the content of the database is thereby organized around so-called standard instruction routes: one route per target group. In the project, the teacher is regarded as the manager of instruction.\ud \ud From that perspective, the database is primarily organized as a teaching facility. Central to the research is the condition that the architecture of the Optical Database has to enable teachers to select and tailor instruction routes to their needs in a way that is perceived as logical and easy to use

Olivine Weathering in Soil, and Its Effects on Growth and Nutrient Uptake in Ryegrass (lolium perenne L.): A Pot Experiment

Mineral carbonation of basic silicate minerals regulates atmospheric CO2 on geological time scales by locking up carbon. Mining and spreading onto the earth's surface of fast-weathering silicates, such as olivine, has been proposed to speed up this natur

Increasing retrievability and reusability oflearning material by developing a measure of relevance based onacademic teachers' conceptions

Web-based or web-supported teaching and learning are fast developing applications of information and communication technologies. One of the latest developments is the use of (multimedia) databases of learning material. One of the key problems concerns the retrieval of relevant units of learning material (ULM's). Examples of ULM's are written chapters, video segments, computer simulations, audio fragments, computer-based training packages, and so on [HiddinkHiddink1998]. This contribution reports about a research and development project that tries to enhance retrievability of ULM's by developing a measure of relevance based on a set of metadata labels that is related to the preferences of academic teachers for certain characteristics of learning material. The measure of relevance will take the form of a distance measure in a metric space that models the collection of ULMs present in the database. The project consists of two parts: (a) development of a distance measure that is based on the importance teachers assign to characteristics of learning material, and (b) testing the usability of the distance measure with a set of ULM's in an experimental database. The presentation focuses on the first step: the development of a distance measure