Icônes et Icônes des grandes villes

János Pilinsky admirait Dostoïevski pour la sincérité de son rapport avec la vérité, sans style. Cette vérité qui sans doute se trouve à l’arrière-garde de l’avant-garde, toujours en décalage. L’icône, oeuvre religieuse enracinée dans un environnement culturel, fut une inspiration majeure de l’art du XXe siècle, non seulement pictural, mais aussi littéraire, en ce qu’elle invite à mettre en évidence le fond des choses ainsi que le cheminement de l’homme vers l’accomplissement. Un cheminement à travers un labyrinthe, disait Simone Weil

A Debreceni Nyári Egyetem újraindításának körülményei 1947-ben

THE RESTART OF THE DEBRECEN SUMMER SCHOOL IN 1947. he essay recalls the process of restarting the Debrecen Summer School after WWII, which operated continously even during the war, and the history of the irst courses organized on the basis of the previous structure. he author describes in detail the heroic struggle of numerous professors in Debrecen, primarily János Hankiss, aiming at reviving the Summer School and putting together the necessary funds for it. he essay elaborates on the obstructive factors and barriers rising immediately after the war and contributing to the complete disintegration of the school

Mixed-reality Automotive Testing with SENSORIS

Highly automated and autonomous vehicles become more and more widespread changing the classical way of testing and validation. Traditionally, the automotive industry has pursued testing rather in real-world or in pure virtual simulation environments. As a new possibility, mixed-reality testing has also appeared enabling an efficient combination of real and simulated elements of testing. Furthermore, vehicles from different OEMs will have a common interface to communicate with a test system. The paper presents a mixed-reality test framework for visualizing perception sensor feeds real-time in the Unity 3D game engine. Thereby, the digital twin of the tested vehicle and its environment are realized in the simulation. The communication between the sensors of the tested vehicle and the central computer running the test is realized via the standard SENSORIS interface. The paper outlines the hardware and software requirements towards such a system in detail. To show the viability of the system a vehicle in the loop test has been carried out

Quantum homogenization and state randomization in semi-quantal spin systems

We investigate dynamics of semi-quantal spin systems in which quantum bits are attached to classically and possibly stochastically moving classical particles. The interaction between the quantum bits takes place when the respective classical particles get close to each other in space. We find that with Heisenberg XX couplings quantum homogenization takes place after a time long enough, regardless of the details of the underlying classical dynamics. This is accompanied by the development of a stationary bipartite entanglement. If the information on the details of the motion of a stochastic classical system is disregarded, the stationary state of the whole quantum subsystem is found to be a complete mixture in the studied cases, though the transients depend on the properties of the classical motion.Comment: 10 pages, 10 figures (included

Anisotropic invasion and its consequences in two-strategy evolutionary games on a square lattice

We have studied invasion processes in two-strategy evolutionary games on a square lattice for imitation rule when the players interact with their nearest neighbors. Monte Carlo simulations are performed for systems where the pair interactions are composed of a unit strength coordination game when varying the strengths of the self-dependent and cross-dependent components at a fixed noise level. The visualization of strategy distributions has clearly indicated that circular homogeneous domains evolve into squares with an orientation dependent on the composition. This phenomenon is related to the anisotropy of invasion velocities along the interfaces separating the two homogeneous regions. The quantified invasion velocities indicate the existence of a parameter region in which the invasions are opposite for the horizontal (or vertical) and the tilted interfaces. In this parameter region faceted islands of both strategies shrink and the system evolves from a random initial state into the homogeneous state that first percolated

Különböző szisztémikus herbicidek fehér fagyöngy (Viscum album) elleni hatékonyságának, illetve a fagyöngy hiperparazita kórokozójára gyakorolt antifungisztatikus hatásának vizsgálata

There are more than 3000 ha in Hungary infected by European mistletoe (Viscum album L.), which have currently raised. The only way to control this hemiparasite is to cut down the infected branches, while other effective control methods are unknown. Our research focused on the efficiency of herbicide control methods against V. album. We tested three herbicide agents and combinations in three concentrations during our study (glyphosate isopropylamine salt, 2,4-dichlorophenoxyacetic acid, methsulphuron-methil). After the pesticide treatments the phototoxic effects were studied on mistletoe shrubs and on the host trees (Acer campestre L.) too. The most efficient agent was 2,4-dichlorophenoxyacetic acid, which caused the whole necrosis of mistletoe shrubs even in the lowest concentration, but low chlorosis, rarification of foliage and drying of twigs were detected on the host trees. Phaeobotriosphaeria visci, which seems suitable for biological control, appeared 3–6 months after the application of 2,4-D on the necrotic mistletoe shrubs. Therefore the effect of 2,4-D and glyphosate on the mycelial growth were examined under in vitro laboratory conditions. Even the lowest herbicide concentration caused significantly lower mycelial growth; besides higher concentrations no mycelial growth was detected. An incidental combined herbicide and spore suspension treatment is not possible, due to the antifungal effects of these pesticides.Peer reviewe