@article {465, title = {Unpacking the nature of problem solving processes in a dynamic geometry environment: Different technological effects}, journal = {Journal f{\"u}r Mathematik-Didaktik}, year = {Submitted}, author = {Ana Kuzle} } @conference {449, title = {Unpacking Children{\textquoteright}s Angle "Grundvorstellungen{\textquotedblright}: The Case of Distance {\textquotedblleft}Grundvorstellung{\textquotedblright} of 1{\textdegree} Angle}, booktitle = {PME 38}, year = {2014}, month = {2014}, address = {Vancouver, Canada}, author = {Ana Kuzle and Christian Dohrmann}, editor = {Peter Liljedahl and Natalie Sinclare} } @article {KorDoh-UIDDGS-2010, title = {User Interface Design for {D}ynamic {G}eometry Software}, journal = {Proceedings of CADGME 2009}, volume = {3}, number = {2}, year = {2010}, pages = {59-66}, abstract = {

In this article we describe long-standing user interface issues with Dynamic Geometry Software and common approaches to address them. We describe first prototypes of multi-touch- capable DGS. We also give some hints on the educational benefits of proper user interface design.

}, keywords = {refereed}, url = {http://dppd.ubbcluj.ro/adn/article_3_2_6.pdf}, author = {Kortenkamp, Ulrich and Dohrmann, Christian} } @conference {KorRol-UTTLP-2009, title = {Using Technology in the Teaching and Learning of Box Plots}, booktitle = {Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France)}, year = {2009}, abstract = {

Box plots (or box-and-whisker-plots) can be used as a powerful tool for visualising sets of data values. Nevertheless, the information conveyed in the representation of a box plot is restricted to certain aspects. In this paper, we discuss both the potential and limitations of box plots. We also present a design for an empirical study in which the use of a variety of tasks explicitly addresses this duality. The activities used in the study are based on an interactive box plot applet that surpasses the currently available tools and offers new ways of experiencing box plots.

}, keywords = {refereed}, url = {http://www.inrp.fr/publications/edition-electronique/cerme6/wg7-03-kortenkamp-rolka.pdf}, author = {Kortenkamp, Ulrich and Rolka, Katrin}, editor = {Durand-Guerrier, Viviane and Soury-Lavergne, Sophie and Arzarello, Ferdinando} } @conference {KorDohKreDor-UIPTR-2009, title = {Using the {I}ntergeo Platform for Teaching and Research}, booktitle = {Proceedings of the 9th International Conference on Technology in Mathematics Teaching}, year = {2009}, publisher = {ICTMT-9}, organization = {ICTMT-9}, address = {Metz}, abstract = {

We describe the key achievements of Intergeo, a project co-funded within the eContentplus programme of the European Union, and their impact on teacher education, based on the technical and educational concepts of the Intergeo Platform.

}, keywords = {refereed}, author = {Kortenkamp, Ulrich and Dohrmann, Christian and Kreis, Yves and Dording, Carole}, editor = {Bardini, C. and Fortin, C. and Oldknow, Adrian and Vagost, D.} } @conference {KorDohKreDor-UIPTR-2009, title = {Using the {I}ntergeo Platform for Teaching and Research}, booktitle = {Proceedings of the 9th International Conference on Technology in Mathematics Teaching}, year = {2009}, publisher = {ICTMT-9}, organization = {ICTMT-9}, address = {Metz}, abstract = {We describe the key achievements of Intergeo, a project co-funded within the eContentplus programme of the European Union, and their impact on teacher education, based on the technical and educational concepts of the Intergeo Platform.}, keywords = {Intergeo, refereed}, author = {Kortenkamp, Ulrich and Dohrmann, Christian and Kreis, Yves and Dording, Carole}, editor = {Bardini, C. and Fortin, C. and Oldknow, Adrian and Vagost, D.} } @conference {KorRic-UATPIUGS-2004, title = {Using Automatic Theorem Proving to Improve the Usability of Geometry Software}, booktitle = {Proceedings of MathUI 2004}, year = {2004}, abstract = {

Dynamic or interactive Geometry software (DGS) is the mathematical version of vector based drawing software: the objects (points, lines, circles, conics, polygons, etc.) are both graphical and mathematical entities. This allows adding relations between the objects that govern their behavior. Thus, DGS is used as an input tool for constructions, as opposed to simple drawings. The additional information that is present in a construction can be used to greatly enhance the usability of DGS. We show how automatic theorem proving can be used to remove redundant elements in a construction that obstruct a smooth work flow clarify the semantics of user actions, and improve the graphical rendering of elements. Finally we discuss the various possibilities of transforming the mathematical tool DGS into an educational tool. Here, automatic theorem proving is used to analyze user actions and to react properly.

}, keywords = {refereed}, url = {http://kortenkamps.net/papers/2004/ATP-UI-article.pdf}, author = {Kortenkamp, Ulrich and Richter-Gebert, J{\"u}rgen}, editor = {Libbrecht, Paul} }