Application of the bi-characteristic method for reconstructing the effective frequency of electron collisions in the ionosphere

The goal of the paper is to overview contemporary theoretical and experimental research of the microwave electric noise and fluctuations of hot carriers in semiconductors, revealing sensitivity of the noise spectra to non-linearity in the applied electric field strength and, especially, in the carrier density. During the last years, investigation of electronic noise and electron diffusion phenomena in doped semiconductors was in a rapid progress. By combining analytic and Monte Carlo methods as well as the available experimental results on noise, it became possible to obtain the electron diffusion coefficients in the range of electric fields where inter-electron collisions are important and Price’s relation is not necessarily valid. Correspondingly, a special attention to the role of inter-electron collisions and of the non-linearity in the carrier density while shaping electric noise and diffusion phenomena in the non-equilibrium states will be paid. The basic and up-to-date information will be presented on methods and advances in this contemporary field - the field in which methods of non-linear analytic and computational analysis are indispensable while seeking coherent understanding and interpretation of experimental results.

Download Full-text

Fully relativistic B-spline R-matrix calculations for electron collisions with xenon atoms

Journal of Physics Conference Series ◽

10.1088/1742-6596/194/4/042024 ◽

2009 ◽

Vol 194 (4) ◽

pp. 042024

Author(s):

Oleg Zatsarinny ◽

Klaus Bartschat

Keyword(s):

Electron Collisions ◽

R Matrix ◽

B Spline

Download Full-text

Relativistic B-Spline R-Matrix Calculations for Electron Collisions with Ytterbium

Atoms ◽

10.3390/atoms9030047 ◽

2021 ◽

Vol 9 (3) ◽

pp. 47

Author(s):

Kathryn R. Hamilton ◽

Klaus Bartschat ◽

Oleg Zatsarinny

Keyword(s):

Experimental Data ◽

Electron Scattering ◽

Cross Sections ◽

Matrix Method ◽

Model Potential ◽

Electron Collisions ◽

R Matrix ◽

B Spline ◽

Potential Approach

We have applied the full-relativistic Dirac B-Spline R-matrix method to obtain cross sections for electron scattering from ytterbium atoms. The results are compared with those obtained from a semi-relativistic (Breit-Pauli) model-potential approach and the few available experimental data.

Download Full-text

Thorstein Veblen on economic man: toward a new method of describing human nature, society, and history

Evolutionary and Institutional Economics Review ◽

10.1007/s40844-020-00194-x ◽

2021 ◽

Author(s):

Noriko Ishida

Keyword(s):

Human Nature ◽

Traditional Theory ◽

Characteristic Method ◽

Classical Concept ◽

Qualitative Aspect ◽

Thorstein Veblen ◽

Economic Action ◽

Economic Man ◽

Logical Connection ◽

Theory Of Human Nature

AbstractThe fact that Veblen was a keen critic of the neo-classical concept of “economic man” is well known. However, the following issues have not been discussed in enough depth: how he rebuilt the traditional theory of human nature through his new methodology of economics, how much his methodological revision broadened the scope of economics, and what kind of phenomena Veblen’s economic theory elucidates. This article examines these issues and aims to show the logical connection between Veblen’s controversial proposal on the methodology of economics and his analysis of economic phenomena. Specifically, it reconsiders Veblen’s analysis of economic action using a unique concept of instincts, his logic of explaining the relation between society and human nature, his way of drawing history from the relativistic worldview, and his characteristic method of grasping the cause and effect of economic phenomena. Finally, it highlights the importance of modifying the concept of “economic man” by focusing on the qualitative aspect. Particular reference is made to the economic concepts of utility, efficiency, and intangibility.

Download Full-text