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ancient octant (eigth part of the circumference of a circle) and is used to measure the angular difference between the horizon and the sun. To take a sight , the sun's image is reflected by a moveable mirror [...] of the sextant. Additional optical filters (grey or coloured) are used to avoid damage to the eye by the intense light of the sun and also to reduce disturbances of the reflected image caused by e.g. [...] Jesper (2013): Geomat.dk : Historical Instruments of Navigation – used as Educational Tools in Mathematics , in: P. Heering, Klassen, S. & Metz, D. (eds.): Enabling Scientific Understanding through

, its opposite goes into the next cup. Here a second element is used (with the same plate beginning as in the first cup) to make a connection to the third cup and so forth. Hence in every cup of the [...] except for the first and the last cup. The Crown of Cups can be used to experience the effect of electricity physiologically. Just place a finger of one hand into the first cup and a finger from the

precursor to the tangent galvanometer is the tangent bussole, which used a ring of plain copper instead of the induction coils. The tangent galvanometer in our HistoLab is labelled "Philip Harris Ltd.

on the other an elder pith ball. The weight of the copper rod is used to tighten the metallic wire without disrupting it. In the glass plate towards its rim there is a hole through which another rod with

detectors in terms of precise measurements they are only put to use in civil and educational environments. further reading Korff, Sebastian (2014): Wie das Knacken in den Geigerzähler kam.

Lucida facilitates to make a drawing of a microscopic object (using a suitable objective lens!) or of a macroscopic object. further reading Fiorentini, Erna (2006): Camera Obscura vs. Camera Lucida

prototype of modern magnifying glasses. It was and still is put to use to magnify minute writings. further reading Belting, Hans (2008): Florenz und Bagdad. Eine westöstliche Geschichte des Blicks .

of online communication Information theory Theories of media use Media and convergence theory Network effects and standards Media change Content management Price strategies Teaching and learning

scientifically edit the latter. They should be able to collect data by using qualitative methods and to analyze the latter with regard to the research question. Module contents: As part of the module, the

of external consultants who specify the problem and work on it using various methods. The solution proposals developed are presented to the partner from practice. Examination achievements: Presentation