Johannes Kepler University of Linz

About: Johannes Kepler University of Linz is a education organization based out in Linz, Oberösterreich, Austria. It is known for research contribution in the topics: Computer science & Thin film. The organization has 6605 authors who have published 19243 publications receiving 385667 citations.

Editorial: BeAware!-Situation awareness, the ontology-driven way

Abstract: Information overload is a severe problem for human operators of large-scale control systems as, for example, encountered in the domain of road traffic management. Operators of such systems are at risk to lack situation awareness, because existing systems focus on the mere presentation of the available information on graphical user interfaces-thus endangering the timely and correct identification, resolution, and prevention of critical situations. In recent years, ontology-based approaches to situation awareness featuring a semantically richer knowledge model have emerged. However, current approaches are either highly domain-specific or have, in case they are domain-independent, shortcomings regarding their reusability. In this paper, we present our experience gained from the development of BeAware!, a framework for ontology-driven information systems aiming at increasing an operator's situation awareness. In contrast to existing domain-independent approaches, BeAware!'s ontology introduces the concept of spatio-temporal primitive relations between observed real-world objects thereby improving the reusability of the framework. To show its applicability, a prototype of BeAware! has been implemented in the domain of road traffic management. An overview of this prototype and lessons learned for the development of ontology-driven information systems complete our contribution.

StratomeX: Visual Analysis of Large-Scale Heterogeneous Genomics Data for Cancer Subtype Characterization

Abstract: Identification and characterization of cancer subtypes are important areas of research that are based on the integrated analysis of multiple heterogeneous genomics datasets. Since there are no tools supporting this process, much of this work is done using ad-hoc scripts and static plots, which is inefficient and limits visual exploration of the data. To address this, we have developed StratomeX, an integrative visualization tool that allows investigators to explore the relationships of candidate subtypes across multiple genomic data types such as gene expression, DNA methylation, or copy number data. StratomeX represents datasets as columns and subtypes as bricks in these columns. Ribbons between the columns connect bricks to show subtype relationships across datasets. Drill-down features enable detailed exploration. StratomeX provides insights into the functional and clinical implications of candidate subtypes by employing small multiples, which allow investigators to assess the effect of subtypes on molecular pathways or outcomes such as patient survival. As the configuration of viewing parameters in such a multi-dataset, multi-view scenario is complex, we propose a meta visualization and configuration interface for dataset dependencies and data-view relationships. StratomeX is developed in close collaboration with domain experts. We describe case studies that illustrate how investigators used the tool to explore subtypes in large datasets and demonstrate how they efficiently replicated findings from the literature and gained new insights into the data. © 2012 Wiley Periodicals, Inc.

Structure of the second valence band in PbTe

Abstract: The orientation of the main axis of the constant-energy ellipsoids and the mass-anisotropy ratio $\frac{{m}_{l}}{{m}_{t}}$ of the secondary valence-band extrema of PbTe has been determined experimentally. These extrema are generally believed to be located at the $\ensuremath{\Sigma}$ point of the Brillouin zone. Investigation of the anisotropy behavior of the coefficient of the conductivity of warm holes and magnetoresistance measurements showed that the main axes of these ellipsoids are parallel to 100g and do not coincide with the symmetry direction of the $\ensuremath{\Sigma}$ point. The value of the mass-anisotropy ratio for the secondary valence band in PbTe is approximately 10. It has been derived from magnetoresistance experiments.

The Size and Development of the Shadow Economies in the Asia-Pacific

Abstract: * Professor Dr. Friedrich Schneider, Department of Economics, Johannes Kepler University of Linz, Altenbergerstrasse 69, A-4040 Linz-Auhof, Austria. Phone: 0043-70-2468-8210, Fax: 0043-70-2468-8209. Email: friedrich.schneider@jku.at, http://www.economics.uni-linz.ac.at/Members/Schneider/default.htm . Dr. Christopher Bajada, School of Finance and Economics, University of Technology, Sydney, P.O Box 123 Broadway, Syndey NSW Australia 2007. Phone: +61-2-9514-7786, Fax: +61-2-9514-7711. E-mail: chris.bajada@uts.edu.au