Rigorous Error Bounds in Linear Programming Christian Keil Hamburg University of Te hnology, Institute for Reliable Computing .keil tu-harburg.de Abstra t. Linear Programming has numerous appli ations. Re ently it has been shown that many real world problems exhibit numeri al di ulties due to illonditioning. This paper des ribes Lurupa, a software pa kage for omputing rigorous bounds for the op...

is the need to share and utilize it among the members of the scientific community. The concept of science, either basic or applied, implicates its utility for the development of the society. This is the reason why no discovery should stay private and the public access needs to be established. It is a kind of exchange which benefits the authors and the scientific community. The investigators gai...

in general, and of learning in particular, both at the level of construct (i.e., Schunk & Zimmerman, 2008) and of assessment (i.e., Lozano & De la Fuente, in press; Núñez, Solano, GonzálezPienda, & Rosário, 2006a) and its promotion in formal (i.e., Cardelle-Elawar & Sanz de Acedo, in press; Rosário, Núñez, González-Pienda, Valle, Trigo, & Guimarães, in press) and informal contexts (Rosário, Mou...

In this article we give unprovability proofs of several combinatorial statements using the method of indiscernibles. Our first two statements are strong versions of KM (the Kanamori-McAloon principle) and KM(2), (the Kanamori-McAloon principle for pairs) that both allow unexpectedly simple proofs. We proceed to discuss results by A.Weiermann and G.Lee on IΣkprovability/unprovability of the prin...

This theory of mutation would account for differences in the rate of evolution of different organisms, differences in the rate of evolution at different periods in phylogenetic development, the genetic stability of certain genera and species over long periods of time, and the rare occurrence of mutations in most of the existing species of plants and animals. Evolution would depend, to a conside...

actively and consciously control their own learning processes in terms of cognition, motivation and behaviour (Zimmerman, 1998; 2000). It matters not only for autonomous learners, but also for learning in social contexts. In the case of a classroom, the selfregulation process does not concern only students, but also teachers (De la Fuente & Justicia, 2007; De la Fuente et al., 2007), because th...

The opening up of the mm-wave band has created opportunities for high-data-rate communication, radar and medical imaging. The cost and size advantages of CMOS have motivated research on 60GHz CMOS front-end design [1]. However, very few CMOS mmwave power amplifiers (PAs) have been reported so far. Furthermore, most of the mm-wave PAs reported use bulky transmission lines [2, 3], increasing sili...

serves to help students’ motivation in the teaching and learning processes. The concept of critical thinking arises from the practice of reflective thinking (Leung & Kember, 2003; Phan, 2007, 2008a), where this construct has been shown to relate positively to students’ academic success (Lee & Loughran, 2000). Critical thinking helps individuals to think and analyse critically about their own le...

all students the opportunity for success. The complexities of being an effective teacher today are related to questions such as: what motivates teachers to choose and persevere in this profession? how do they meet the conflicting challenges of “high-stakes testing” and simultaneously be accountable to an increasingly diverse population in their classrooms? Thus, the primary aim of this study is...