A critical assessment of theoretical models proposed in the literature for the spin structure in amorphous Fe100–xZrx alloys (a three-dimensional ferromagnet with quenched random-exchange disorder which exhibits a re-entrant behaviour at low temperatures), based on a detailed comparison between theoretical predictions and available experimental results, is presented. The infinite ferromagnetic ...

A fundamental goal of systems neuroscience is to understand how the collective dynamics of neurons encode sensory information and guide behavior. To answer this important question one needs to uncover the network of underlying neuronal interactions. Whereas advances in technology during the last several decades made it possible to record neural activity simultaneously from a large number of net...

Different theoretical models which attempt to describe hadronic production of heavy quarkonia are reviewed. Firstly, we consider the Color Singlet Model and point out the large discrepancies between the theoretical predictions and the results from the Tevatron detectors. Then some other models are introduced, quickly discussed and confronted with experimental results. Finally, we suggest possib...

Three arguments are raised in this article with regard to the indices used to measure the digital divide. First, I criticize policymakers who rely on simplistic measures of the digital divide, at the expense of a thoughtful analysis of (1) the purpose of the tool, (2) the level of observation, and (3) the method of approaching the data. Second, I argue that networks and associated technologies ...

A discrete Morse function for a simplicial complex describes how to construct a homotopy equivalent CW-complex with hopefully fewer cells. We associate a boolean function with the simplicial complex and construct a discrete Morse function using its Fourier transform. Methods from theoretical computer science by O’Donnell, Saks, Schramm, and Servedio, together with experimental data on complexes...

This article addresses the question of new media studies’ meta-theoretical premises. It is argued that the field’s exceptional openness towards theory and method is a valuable asset, which needs to be cultivated by means of a more explicit meta-theoretical debate. Drawing on critical theory, three meta-theoretical criteria concerning power, reason and closure are suggested and applied in a revi...

In the present commentary, the theoretical construct of Multidimensional Health Locus of Control (MHLC) is described and evaluated in terms of its contributions to health psychology. This concept is compared to other control beliefs, in particular to perceived self-efficacy. It is argued that MHLC has supplied health psychology with essential insights and has offered a great deal of intellectua...

Simple theoretical models can be constructed to study the behavior of sensor-fused systems using idealized sensor suites. Models are available for feature-level and decision-level fusion, both of which are now being used with demining sensors. These models are attractive as design tools and for estimating the expected performance of new sensor suites, since their performance can be evaluated wi...

The creative potential of teams plays a crucial role in generating the competitive advantage of organizations. We introduce an architecture supporting creative group processes in the context of business processes. Based on the theoretical concept of Pockets of Creativity (Seidel et al. 2010), the architecture aims to balance freedom for creative group work and constraints set by the processes i...

In 2008, new classes of high-temperature superconductors containing iron have been discovered. These iron pnictides offer a new area of exploration and understanding of superconductivity. Quantum oscillations is a bulk probe that allows us to map out the full Fermi surface of a superconducting system in its normal metallic state. These oscillations are determined by the Landau quantization in h...