Measurements of resonant tunneling through a localized impurity state are used to probe fluctuations in the local density of states of heavily doped GaAs. The measured differential conductance is analyzed in terms of correlation functions with respect to voltage. A qualitative picture based on the scaling theory of Thouless is developed to relate the observed fluctuations to the statistics of s...

This chapter engages with the recent skeptical turn towards the knowledge-based theory of clusters, which is criticized for overemphasizing the role of geographical proximity in facilitating knowledge dynamics among entrepreneurs. In particular, this study aims at the role of so-called organizing visions as facilitating crosscluster knowledge exchange. Building on a proximity framework, this st...

By applying a genetic algorithm and ab initio atomistic thermodynamics, we identify the stable and metastable compositions and structures of MgMOx clusters at realistic temperatures and oxygen pressures. We find that small clusters (M≲5) are in thermodynamic equilibrium when x>M. The nonstoichiometric clusters exhibit peculiar magnetic behavior, suggesting the possibility of tuning magnetic pro...

the present study aims to examine how to create alternative methodology in social sciences by using qualitative approach of grounded theory and implementing focus group workshops and performing semi-structured interviews with expert professors in social science methodology. the method of the present research is qualitative approach of grounded theory; focus group workshops were held and semi-st...

Current methods in qualitative physics (QP) sometimes predict behaviors of physical systems that do not correspond to any real-valued solution . The existence of spurious solutions and their origins have been analyzed for the treatment of differential equations [Kuipers 86], [Schmid 88] as well as of simple equations [Struss 87], [Struss 88a] . For the first case, the reason for the prediction ...

In this paper the qualitative behaviour of a delayed tri-trophic food chain model with Holling type II and modified Leslie-Gower functional responses is studied. Condition for existence and local stability of the interior equilibrium of the model are derived. Hopf bifurcation analysis is discussed by considering gestation time delay as bifurcation parameter. Applying normal form method and cent...

This special session focuses on the dynamic properties of fluids and nonlinear waves arsing in systems such as Euler equations, kinetic equations, nonlinear Schrodinger equations, nonlinear wave equations etc. The main aspects include the global well-posedness of solutions, existence, stability/instability and nearby local qualitative structures of special states etc. The theory and the methods...

The paper presents a 2 frame structure-from-motion algorithm that operates by mapping local changes (image deformations) into estimates of time-to-collision (TTC). For constant velocity motion of the camera in a stationary scene, time-to-collision amounts to coarse depth data useful for navigation and qualitative scene understanding. The theory is supported by a set of experiments demonstrating...

Nonlocal stringy versions of the Nambu-Jona-Lasinio and Gross-Neveu models arise in a certain limit of holographic QCD. We analyze the phase structure at finite density and temperature at strong coupling in terms of probe branes in the gravity dual. Comparison with the phase structure of the local field theory models shows qualitative agreement with some aspects, and disagreement with others. F...

The electronic transport properties of heavy–fermion systems were calculated based on a semiphenomenological approach to the lattice non–crossing approximation in the limit of infinite local correlations augmented by crystal– field effects. Within the scope of this calculation using the linearized Boltzmann theory in the relaxation time approximation the qualitative features of the temperature–...