Markus Gärtner

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We establish the optimal diversity-multiplexing (DM) tradeoff of coherent selective-fading multiple-access multiple-input multiple-output (MIMO) channels and provide corresponding code design criteria. As a byproduct, on the conceptual level, we find an interesting relation between the DM tradeoff framework and the notion of dominant error event regions(More)
We present the ICARUS Coreference Explorer, an interactive tool to browse and search coreference-annotated data. It can display coreference annotations as a tree, as an entity grid, or in a standard textbased display mode, and lets the user switch freely between the different modes. The tool can compare two different annotations on the same document,(More)
● Task focused user interfaces (tool specific, search and exploration) ● Extensible plugin architecture ● Integrates with automatic processing tools (e.g. mate-tools [Bohnet, 2010]) ● Remote Tools (Webservices of the German CLARIN-D Initiative) ● Utility Tools for various formats (CoNLL and TCF) ● Export graphs to various formats (*.png , *.svg and *.xml) ●(More)
3D Virtual Worlds have the potential to expand the knowledge of a foreign culture by presenting the information in a visual context. In this paper we describe the design and evaluation of ICURA, a Serious Game that provides an opportunity to learn more about Japanese culture and etiquette. ICURA incorporates different game design and learning principles to(More)
In this paper, we identify the problems of current semantic and hybrid search systems, which seek to bridge structure and unstructured data, and propose solutions. We introduce a novel input mechanism for hybrid semantic search that combines the clean and concise input mechanisms of keyword-based search engines with the expressiveness of the input(More)
3D Electronic Institutions integrate a multi-agent system methodology for arbitrary e-Commerce applications with immersive collaborative 3D environments. This approach facilitates the development of the social and immersive 3D e-Tourism Environment "itchy feet" with the principal goal of developing an instrument to support the complex interaction patterns(More)
We present our approach for annotating a large collection of non-standard multimodal data. Its automatically created silver standard annotations lack the quality of their manual counterparts but will be enriched with confidence estimations which allow an assessment of an annotation’s expected correctness. For this we first aim at providing many different(More)
We present an error mining tool that is designed to help human annotators to find errors and inconsistencies in their annotation. The output of the underlying algorithm is accessible via a graphical user interface, which provides two aggregate views: a list of potential errors in context and a distribution over labels. The user can always directly access(More)
This NECTAR track paper (NECTAR: new scientific and technical advances in research) summarizes recent research and curation activities at the CLARIN center Stuttgart. CLARIN is a European initiative to advance research in humanities and social sciences by providing language-based resources via a shared distributed infrastructure. We provide an overview of(More)