Search results for " Formal"
showing 10 items of 273 documents
Ostrogradsky's Hamilton formalism and quantum corrections
2010
By means of a simple scalar field theory it is demonstrated that the Lagrange formalism and Ostrogradsky's Hamilton formalism in the presence of higher derivatives, in general, do not lead to the same results. While the two approaches are equivalent at the classical level, differences appear due to the quantum corrections.
ComPWA: A common amplitude analysis framework for PANDA
2014
A large part of the physics program of the PANDA experiment at FAIR deals with the search for new conventional and exotic hadronic states like e.g. hybrids and glueballs. For many analyses PANDA will need an amplitude analysis, e.g. a partial wave analysis (PWA), to identify possible candidates and for the classification of known states. Therefore, a new, agile and efficient amplitude analysis framework ComPWA is under development. It is modularized to provide easy extension with models and formalisms as well as fitting of multiple datasets, even from different experiments. Experience from existing PWA programs was used to fix the requirements of the framework and to prevent it from restric…
Equilibrium and nonequilibrium many-body perturbation theory: a unified framework based on the Martin-Schwinger hierarchy
2013
We present a unified framework for equilibrium and nonequilibrium many-body perturbation theory. The most general nonequilibrium many-body theory valid for general initial states is based on a time-contour originally introduced by Konstantinov and Perel'. The various other well-known formalisms of Keldysh, Matsubara and the zero-temperature formalism are then derived as special cases that arise under different assumptions. We further present a single simple proof of Wick's theorem that is at the same time valid in all these flavors of many-body theory. It arises simply as a solution of the equations of the Martin-Schwinger hierarchy for the noninteracting many-particle Green's function with…
The Artistic Commitment of Kenyon Cox: An American Neoclassical Artist
2016
At the end of the nineteenth century, the United States had undergone deep transformations. The second Industrial Revolution had created huge amounts of new wealth and power. This led to an alteration of the urban social fabric and to a repositioning of the country on the international scene.Since the 1870s, the American Renaissance had been a vehicle for the diffusion of new values and new concepts. As a broad neoclassical movement in the arts, it was committed to a rewriting of the country’s national past.At the time, Kenyon Cox (1856-1919) distinguished himself as one of the major artists of the movement, but also as one of its most influential critics and theorists. Cox developed theori…
Entrepreneurship in Burkina Faso : An Economic Analysis of Occupational Choices in the Labor Market and Student Entrepreneurial Intentions
2020
The dominant view of entrepreneurship, particularly in developed countries, is a risky, dynamic activity undertaken voluntarily by a certain category of individuals - " so-called superstars" - in order to benefit more earning opportunities and greater social influence. However, this dynamic view of entrepreneurship contrasts with what is generally described in developing countries, where self-employment is largely conducted in the informal sector; a segment of the labor market that is considered "precarious" and only allows the individual to escape unemployment. Nevertheless, a number of studies, in Africa and more so in Latin America, show that this segment is desirable and likely to provi…
XTDS and SPVIEW: Graphical tools for the analysis and simulation of high-resolution molecular spectra
2008
International audience; XTDS is a Java front-end to the different programs implementing the tensorial formalism developed in the Dijon group [see for instance: V. Boudon, J.-P. Champion, T. Gabard, M. Loëte, F. Michelot, G. Pierre, M. Rotger, Ch. Wenger, M. Rey, J. Mol. Spectrosc. 228 (2004) 620–634 ]. It allows the simulation and analysis of polyad systems for molecules of various symmetries (Td and Oh spherical tops like CH4 and SF6, C2v and C4v quasi-spherical tops like SO2F2 and SF5Cl, D2h molecules like C2H4). SPVIEW is a multiplatform Java application that allows graphical assignment of high-resolution molecular spectra. It is possible to load, display and manipulate experimental and …
DIGITALE MODERATION IN DER DAF-LEHRENDENBILDUNG
2022
The aim of this paper is to show patterns in the moderation of video conferences. The corpus used comes from the Erasmus+ project LEELU (development of teaching skills for extensive reading lessons). The subject of the investigation was how changes in the agenda are negotiated at the beginning of the meetings. A multimodal method based on conversation analysis was chosen for the analysis.
Neil MacCormick's Second Thoughts on Legal Reasoning and Legal Theory. A Defence of the Original View
2011
This paper offers a diachronic reconstruction of MacCormick's theory of law and legal argumentation: In particular, two related points will be highlighted in which the difference between the perspective upheld in Legal Reasoning and Legal Theory and the later writings is particularly marked. The first point concerns MacCormick's gradual break with legal positivism, and more specifically the thesis that the implicit pretension to justice of law proves legal positivism false in all its different versions. The second point concerns MacCormick's acceptance of the one-right-answer thesis and the consequent thinning of the differences between MacCormick's theory of legal reasoning and that of Ron…
On the Role of Inequalities in Legal Systems: A Tocquevilian View
2008
The present paper proposes to interpret the differences in legal systems between common-law and civil-law nations as arising from the importance given to adjudication in comparison with statute laws. It focuses on the relative costs of legal change by adjudication (case law development) when compared with legislation (statutory law development). The main argument is that the public concern with equality is a major determinant of the relative cost of adjudication in a legal system. We develop a model of the legal process that illustrates Tocqueville's fundamental intuition with regard to the uniformity of legal rules, and as a consequences, the relative importance of adjudication and legisla…
DISCOURSE INTERFERENCE IN TRANSLATION
2001
This article focuses on three major factors that may enhance the degree of hybridity of target texts: first, the ideological background, i.e., the prestige accorded to the source culture in relation to the target culture; second, translator's competence, i.e., the translator's ability to rationalise translation process and choose an adequate translation strategy; third, the skopos of translation, i.e., hybrid features may be deliberately imposed upon the translation to enable the text to serve a given function. Each of these factors is analysed within a framework of a concrete text. The conclusion of this analysis is that due to the functionalist approach, the concept of translation has bec…