Search results for "Classical"
showing 10 items of 2294 documents
Functional analysis of the classical, alternative, and MBL pathways of the complement system: standardization and validation of a simple ELISA.
2004
Primary defence against invading microorganisms depends on a functional innate immune system and the complement system plays a major role in such immunity. Deficiencies in one of the components of the complement system can cause severe and recurrent infections, systemic diseases, such as systemic lupus erythematosus (SLE) and renal disease. Screening for complement deficiencies in the classical or alternative complement pathways has mainly been performed by haemolytic assays. Here, we describe a simple ELISA-based format for the evaluation of three pathways of complement activation. The assays are based on specific coatings for each pathway in combination with specific buffer systems. We ha…
A new result on impulsive differential equations involving non-absolutely convergent integrals
2009
AbstractIn this paper we obtain, as an application of a Darbo-type theorem, global solutions for differential equations with impulse effects, under the assumption that the function on the right-hand side is integrable in the Henstock sense. We thus generalize several previously given results in literature, for ordinary or impulsive equations.
On the integrability of the extended nonlinear Schrödinger equation and the coupled extended nonlinear Schrödinger equations
2000
We consider the extended nonlinear Schr¨ (ENLS) equation which governs the propagation of nonlinear optical fields in a fibre with higher-order effects such as higher-order dispersion and self-steepening. We show that the ENLS equation does not pass the Painlev´ test. Similarly, we claim that the coupled ENLS equations and N -coupled ENLS equations which govern the simultaneous propagation of two and more nonlinear fields in optical fibres are also not integrable from the Painlev´ e analysis point of view.
Thermodynamics-based gradient plasticity theories with an application to interface models
2008
AbstractIn the framework of small deformations, the so-called residual-based gradient plasticity theory is reconsidered and improved. Using the notion of moving geometrically necessary dislocations (GNDs), suitable micromechanics interpretations are heuristically given for the higher order boundary conditions and the long distance particle interactions. Also, a comparison is made between this theory and the analogous virtual work principle (VWP)-based one, whereby their respective conceptual and methodological features are pointed out. The conditions under which the two theories lead to a same constitutive model are investigated, showing that, correspondingly, a certain indeterminacy exhibi…
A constitutive framework based on elastic and internal energy degradation
2001
A general constitutive framework is presented capable of representing different irreversible deformation modes, like plasticity, elastic damage, complex evolution of the hardening properties and the induced coupling effects. The formulation can be framed in the generalized standard material models with internal variables and multiple dissipative activation functions. The formulation is thermodynamically consistent and the state laws, the structure of the dissipation and of the activation functions are all derived complying with the principles of thermodynamics. The generalized flow rules are derived under the hypothesis of generalized associativity. The main aspect of the proposed model is …
Theoretical Approaches to Crisis: An Introduction
2020
This chapter sums up the key arguments made in this section of the Handbook. The nine chapters discuss essential EU integration and International Relations approaches and how they study, understand, and explain crisis’ putative impact on the EU: Liberal Intergovernmentalism, Classical Realism, Neo-realism, Neofunctionalism, Institutionalism, Organizational Theory, Cleavage Theory, Social constructivism, and Deliberative Theory. For this purpose, each chapter sets out the theory’s basic assumptions before addressing the following questions: (1) How does each theoretical perspective expect crisis to influence EU institutions and policies? What are the causal mechanisms to account for continui…
Fuzzy Logic, Knowledge and Natural Language
2012
This is an introductive study on what Fuzzy Logic is, on the difference between Fuzzy Logic and the other many-valued calculi and on the possible relationship between Fuzzy Logic and the complex sciences. Fuzzy Logic is nowadays a very popular logic methodology. Different kinds of applications in cybernetics, in software programming and its growing use in medicine seems to make Fuzzy Logic, according to someone, the “new” logic of science and technology. In his enthusiastic panegyric of Fuzzy Logic, Kosko (1993) argues that after thirty years from the birth of this calculus, it is time to declare the new era of Fuzzy Logic and to forget the old era of classical logic. I think that this poin…
On the semiclassical limit of the defocusing Davey-Stewartson II equation
2018
Inverse scattering is the most powerful tool in theory of integrable systems. Starting in the late sixties resounding great progress was made in (1+1) dimensional problems with many break-through results as on soliton interactions. Naturally the attention in recent years turns towards higher dimensional problems as the Davey-Stewartson equations, an integrable generalisation of the (1+1)-dimensionalcubic nonlinear Schrödinger equation. The defocusing Davey-Stewartson II equation, in its semi-classical limit has been shown in numerical experiments to exhibit behavior that qualitatively resembles that of its one-dimensional reduction, namely the generation of a dispersive shock wave: smooth i…
"Nel più fulgido scenario di colori” Goethe e la scoperta del paradiso a Napoli
2017
Dopo avere visitato Roma, nel febbraio del 1787, J.W. Goethe giungeva a Napoli dove: «l’atmosfera si faceva sempre più pura, ormai ci trovavamo in un’altra terra». Nella seconda metà del Settecento, in Europa il poeta di Francoforte rappresentava certamente il massimo fra i divulgatori del mito del paradiso a Napoli e in Campania, ma anche in Sicilia, e dunque nel Meridione d’Italia, sia per la loro rigogliosa e sempre verde natura sia per l’abbondanza delle loro antichità classiche. A Roma Goethe aveva pregustato i frutti di questo paradiso, ma è solo visitando Napoli e il suo territorio che realizza di essere in un altro mondo, totalmente diverso dai paesi del Nord. Il presente saggio ha …
Le mouvement des idées monétaires dans l'Europe moderne
2014
Ce chapitre vise à fournir une vue de l'évolution des idées monétaires dans l'Europe moderne. Il s'alimente notamment des textes des auteurs du présent livre pour en dégager quelques leçons. Dans un premier temps, il discutera du sens du substantif " mercantilisme " tel qu'il a été construit depuis le milieu du dix-huitième siècle : examiner les fondements historiques de cette notion permettra d'en montrer les impasses. Il présentera, dans un second temps, une catégorisation des auteurs construite à partir de leur rapport au pouvoir.