%0 Generic %D 2015 %T Workshop: TeachEngineering Digital Library: Hundreds of Free, Searchable, NGSS-aligned Hands-on Engineering Lessons for K-12 %A Reitsma,Reindert %A Zarske,Malinda %A Yowell,Janet %A Samson,Carleigh %K BIS %B ASEE Annual Conference 2015 %C Seattle, WA %8 2015 %G eng %2 c %4 102487447552 %$ 102487447552 %0 Conference Paper %B Proceedings of the Joint Conference on Digital Libraries (JCDL'11),Ottawa, Canada. %D 2011 %T World vs. Method: Educational Standard Formulation Impacts Document Retrieval %A Marshall,Byron %A Reitsma,Reindert %K Accounting %K BIS %X Although initiatives are underway in the educational community to consolidate disparate collections of educational standards, little has been done to explore the impact of educational standard formulation on information retrieval. Recent research contrasts two categories of educational standards: ‘World’ (topical domain-related concepts) and ‘Method’ (investigative and epistemological principles). This paper explores the information retrieval implications of the World vs. Method distinction. We find that experts are more likely to agree about which educational resources align with a Method standard but that a typical automatic standard assignment tool is more likely to assign a World standard to an educational resource. Further, a text-based information retrieval system is more likely to be accurate in retrieving documents relevant to a World standard as compared to a Method standard. These findings have implications both for educational standard formulation (combining World and Method components in a standard may improve retrieval) and for digital library builders who want to help teachers identify useful, standards-aligned learning objects. %B Proceedings of the Joint Conference on Digital Libraries (JCDL'11),Ottawa, Canada. %8 2011 %G eng %2 b %4 33636190209 %$ 33636190209 %0 Book Section %D 2010 %T Web Services %A Reitsma,Reindert %K BIS %X Overview of Web services technology and its use. %C Hoboken, NJ %V 3 %P 578-592 %8 2010 %G eng %2 d %4 7908530177 %$ 7908530177 %0 Journal Article %J Geoinformatica %D 2007 %T Weight-proportional Space Partitioning Using Adaptive Voronoi Diagrams %A Reitsma,Reindert %A Trubin,S, %A Mortensen,E. %K BIS %X Traditional application of Voronoi diagrams for space partitioning results in Voronoi regions, each with a specific area determined by the generators’ relative locations and weights. Particularly in the area of information space (re)construction, however, there is a need for inverse solutions; i.e., finding weights that result in regions with predefined area ratios. In this paper, we formulate an adaptive Voronoi solution and propose a raster-based optimization method for finding the associated weight set. The solution consists of a combination of simple, fixed-point iteration with an optional spatial resolution refinement along the regions’ boundaries using quadtree decomposition. We present the corresponding algorithm and its complexity analysis. The method is successfully tested on a series of ideal”typical cases and the interactions between the adaptive technique and boundary resolution refinement are explored and assessed. %B Geoinformatica %V 11 %P 383-405 %8 2007 %G eng %N 3 %2 a %4 649330688 %$ 649330688 %0 Journal Article %J SWIM %D 1990 %T WODAN: een Venster op Beleidsinformatie (WODAN: a Window on Decision-making Information) %A Reitsma,Reindert %A Hendriks,P. %K BIS %B SWIM %V 5 %P 15-24 %8 1990 %G eng %2 a %4 51551875072 %$ 51551875072