Search results for "O'"
showing 10 items of 519 documents
High expression of peroxisome proliferator-activated receptor gamma (PPRgamma) in infiltrating lymphocytes from glands with Hashimoto's thyroiditis.
2005
La influencia de Pierre Bayle en la construcción de la segunda antinomia de la razón pura
2020
This paper aims to establish precisely the scope of Pierre Bayle’s influence on the construction of Kant’s second antinomy of pure reason, since there is a remarkable parallelism between this second cosmological conflict and the argument against extension of the article “Zeno of Elea” of Bayle’s Dictionary. It is argued that Bayle, employing the skeptical method in metaphysical research, has a major influence on the construction of the main arguments of the second antinomy and sets a precedent for its logical solution.
The forgotten mathematical legacy of Peano
2019
International audience; The formulations that Peano gave to many mathematical notions at the end of the 19th century were so perfect and modern that they have become standard today. A formal language of logic that he created, enabled him to perceive mathematics with great precision and depth. He described mathematics axiomatically basing the reasoning exclusively on logical and set-theoretical primitive terms and properties, which was revolutionary at that time. Yet, numerous Peano’s contributions remain either unremembered or underestimated.
From Carneades to Cicero
2015
This chapter is about how Stoic epistemology developed in the two centuries after Chrysippus’ death. I first show that, as a result of Carneades’ critique in the mid-second century, there was a shift of emphasis in the epistemological debate between the Stoa and the Academy. From then on the task was not to explain what causal features a cognitive thought has, but to describe what phenomenological features it has. I show that the later Stoics responded to this challenge in two different ways. Some changed Chrysippus’ theory quite radically. They held that a cognitive thought is characterized by giving rise to a sense of conviction, denied that preconceptions count as cognitive thoughts, and…
Anti-Zeno-based dynamical control of the unfolding of quantum Darwinism
2020
We combine the collisional picture for open system dynamics and the control of the rate of decoherence provided by the quantum (anti-)Zeno effect to illustrate the temporal unfolding of the redundant encoding of information into a multipartite environment that is at the basis of Quantum Darwinism, and to control it. The rate at which such encoding occurs can be enhanced or suppressed by tuning the dynamical conditions of system-environment interaction in a suitable and remarkably simple manner. This would help the design of a new generation of quantum experiments addressing the elusive phenomenology of Quantum Darwinism and thus its characterization.
Zeno-like phenomena in STIRAP processes
2011
The presence of a continuous measurement quantum Zeno effect in a stimulated Raman adiabatic passage is studied, exploring in detail a sort of self-competition of the damping, which drives the system toward a loss of population and, at the same time, realizes the conditions for optimizing the adiabatic passage.
Role of temperature in the occurrence of some Zeno phenomena
2012
Temperature can be responsible for strengthening effective couplings between quantum states, determining a hierarchy of interactions, and making it possible to establish such dynamical regimes known as Zeno dynamics, wherein a strong coupling can hinder the effects of a weak one. The relevant physical mechanisms which connect the structure of a thermal state with the appearance of special dynamical regimes are analyzed in depth.
Hilbert space partitioning for non-Hermitian Hamiltonians: From off-resonance to Zeno subspaces
2020
Abstract Effective non-Hermitian Hamiltonians describing decaying systems are derived and analyzed in connection with the occurrence of possible Hilbert space partitioning, resulting in a confinement of the dynamics. In some cases, this fact can be interpreted properly as Zeno effect or Zeno dynamics, according to the dimension of the subspace one focuses on; in some other cases, the interpretation is more complicated and traceable back to a mix of Zeno phenomena and lack of resonance. Depending on the complex phases of the diagonal terms of the Hamiltonian, the system reacts in different ways, requiring larger moduli for the dynamical confinement to occur when the complex phase is close to…
The time-harmonic Maxwell equations
1996
In this chapter we shall see that the solution of the time-harmonic Maxwell equations with real coefficients can be transformed to time independent partial differential equations with complex coefficients. Then we introduce a finite element approximation proposed in [Křižek, Neittaanmaki, 1989]. A similar technique is analyzed in [Křižek, Neittaanmaki, 1984b], [Monk, 1992a] (for fully time dependent problems see, e.g., [Monk 1992b,c]).
Maxwell’s Equations
2012
The empirical basis of electrodynamics is defined by Faraday’s law of induction, by Gauss’ law, by the law of Biot and Savart and by the Lorentz force and the principle of universal conservation of electric charge. These laws can be tested – confirmed or falsified – in realistic experiments. The integral form of the laws deals with physical objects that are one-dimensional, two-dimensional, or three-dimensional, that is to say, objects such as linear wires, conducting loops, spatial charge distributions, etc. Thus, the integral form depends, to some extent, on the concrete experimental set-up. To unravel the relationships between seemingly different phenomena, one must switch from the integ…