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Dreiseitl S.,Upper Austria University of Applied Sciences
AMIA ... Annual Symposium proceedings / AMIA Symposium. AMIA Symposium | Year: 2012

The accurate assessment of the calibration of classification models is severely limited by the fact that there is no easily available gold standard against which to compare a model's outputs. The usual procedures group expected and observed probabilities, and then perform a χ(2) goodness-of-fit test. We propose an entirely new approach to calibration testing that can be derived directly from the first principles of statistical hypothesis testing. The null hypothesis is that the model outputs are correct, i.e., that they are good estimates of the true unknown class membership probabilities. Our test calculates a p-value by checking how (im)probable the observed class labels are under the null hypothesis. We demonstrate by experiments that our proposed test performs comparable to, and sometimes even better than, the Hosmer-Lemeshow goodness-of-fit test, the de facto standard in calibration assessment. Source


Strohmeier D.,Upper Austria University of Applied Sciences
New directions for youth development | Year: 2012

This chapter reviews recent research on bullying from an educator's perspective. It is well known that bullying, a serious issue in schools, can be prevented when educators intervene. But research has shown that it is difficult for educators to detect bullying situations in their school and intervene competently and effectively. This chapter examines how educators can detect bullying, how they can best tackle serious cases of bullying, and how they can best prevent bullying in the long run. Copyright © 2012 Wiley Periodicals, Inc., A Wiley Company. Source


Lanzerstorfer C.,Upper Austria University of Applied Sciences
Fuel Processing Technology | Year: 2016

Data about the flowability of fly ashes are important for the design of hoppers of fly ash collection equipment and fly ash storage silos. Fly ashes from sixteen grate-fired combustion plants (first-stage and second-stage de-dusting fly ash) were examined for flow relevant properties. The flowability category of the coarser first-stage fly ashes was cohesive to easy-flowing, while for the second-stage fly ashes the flowability category was very cohesive to cohesive. A good correlation was found between the flowability of the fly ashes and the mass median diameter of their particle size distribution. The correlation of the flowability with the bulk density or with the angle of repose was less significant. No correlation was found with the other parameters investigated. Moreover, the effective angle of internal friction, the wall friction angle and bulk density can be expressed as a function of the mass median diameter. Thus, the particle size is the most important parameter for the flowability of the fly ashes. © 2016 Elsevier B.V. All rights reserved. Source


Strohmeier D.,Upper Austria University of Applied Sciences
New directions for youth development | Year: 2012

The ViSC Social Competence Program has been implemented in Austrian schools within the scope of a national strategy plan, Together Against Violence. The program is a primary preventive program designed for grades 5 to 8. The prevention of aggression and bullying is defined as a school development task, and the initial implementation of the program lasts one school year. The program consists of universal and specific actions that are implemented through in-school teacher training and a class project for students. The program was evaluated with a randomized intervention control group design. Data were collected from teachers and students. Results suggest that the program reduces aggression in schools. Copyright © 2012 Wiley Periodicals, Inc., A Wiley Company. Source


Lawlor V.,Upper Austria University of Applied Sciences
Journal of Power Sources | Year: 2013

Micro-Tubular Solid Oxide Fuel Cells (MT-SOFCs) are small tubular shaped, ceramic based, electrochemical electrical power generation devices that operate at high temperatures and can potentially be fuelled with hydrocarbon based fuels. In comparison to Part I of this review paper series, which considered stacks of MT-SOFCs, part II aims to gather and arrange information regarding MT-SOFCs, in order provide a state of the art account for those entering the field or those interested in the technology. This review paper deals with MT-SOFC; reported architectures, geometry and cost considerations, details regarding individual cell components, reported methods of producing MT-SOFCs, reports and details regarding MT-SOFCs and reforming, reported novel modes of operation, reports regarding the mechanical properties of MT-SOFCs, comment and reports regarding SOFC/MT-SOFC reliability and durability, and finally, comment and conclusions. © 2013 Elsevier B.V. All rights reserved. Source

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