From quantum to classical dynamics: The relativistic O(N)O(N) model in the framework of the real-time functional renormalization group

We investigate the transition from unitary to dissipative dynamics in the relativistic $O(N)$ vector model with the $\lambda (\varphi^{2})^{2}$ interaction using the nonperturbative functional renormalization group in the real-time formalism. In thermal equilibrium, the theory is characterized by two scales, the interaction range for coherent scattering of particles and the mean free path determined by the rate of incoherent collisions with excitations in the thermal medium. Their competition determines the renormalization group flow and the effective dynamics of the model. Here we quantify the dynamic properties of the model in terms of the scale-dependent dynamic critical exponent $z$ in the limit of large temperatures and in $2 \leq d \leq 4$ spatial dimensions. We contrast our results to the behavior expected at vanishing temperature and address the question of the appropriate dynamic universality class for the given microscopic theory.Comment: 32 pages, 12 captioned figures; revised and extended version accepted for publication in PR

Vegetation-based landscape regions of Hungary.

he first version of the map of the Hungarian vegetation-based landscape regions were prepared at the scale of 1 : 200,000 (1 km or higher resolution). The primary goal of the map was to provide an exact background for the presentation and evaluation of the data of theMÉTA database. Secondly, we intended to give an up-to-date and detailed vegetation-based division of Hungary with a comprehensive nomenclature of the regions. Regions were primarily defined on the basis of their present zonal vegetation, or their dominant extrazonal or edaphic vegetation. Where this was not possible, abiotic factors that influence the potential vegetation, the flora were taken into consideration, thus, political and economical factors were ignored. All region borders were defined by local expert botanists, mainly based on their field knowledge. The map differs in many features from the currently used, country- wide, flora- or geography-based divisions in many features. We consider our map to be temporary (i.e. a work map), and we plan to refine and improve it after 5 years of testing

Bemerkungen Zum Gepidischen Corpus

Notes on the Gepid Corpus . The idea of the publication of the Gepid cemeteries in Hungary was conceived about 25 years ago and the drawing of the finds recovered during the recent excavations started in 1985 (Szolnok-Szanda, Kishomok, Ártánd, Biharkeresztes, etc.). Finally, two volumes were edited but the Ártánd and the Biharkeresztes cemeteries (Kisfarkasdomb and Nagyfarkasdomb), which stood in the full glare of international publicity, were omitted. On Kisfarkasdomb, the author unearthed 25 graves in 1966 and a further one in 1971 so he finds it fair to compensate for the debt of 40 years. The burial customs observed in the cemetery (S-N and exceptionally 3 W-E orientations of the graves, artificial cranial deformations and weapons placed in the graves of women) and certain types of the finds, the brooches (mostly simple ones, with inverted foot), the buckles (among them two gilded silver Kerbschnittschnalle ), the 11 vessels found in the cemetery (mostly copies of provincial Roman vessels), the beads (characteristic discoid amber beads), a few spears, spindle whorls, a nomadic metal mirror, and a two-sided bone comb suggest that the cemetery was opened at the end of the 4 th century before the Hun period and it was used all through the Hun period. From a historical aspect, it is only the Gepid ethnicity that could use the cemetery within the given chronological frames, so the cemetery plays a key role in the determination of the early phase of the Gepid legacy

Eine Gräbergruppe mit nordsüdlicher grablegung im gepidischen Gräberfeld von Biharkeresztes-Ártánd-Nagyfarkasdomb

N-S oriented grave group in the Gepid cemetery of Biharkeresztes-Ártánd-Nagyfarkasdomb. There was a grave group in the Hun period Gepid cemetery of Biharkeresztes-Ártánd-Nagyfarkasdomb that could be characterised by N-S orientation, drink offerings usually placed in a jug at the head and the special costumes. Both men and women wore buckled boots on the feet and two or three belts around the waists: one belonged to the trousers, one to the kaftan and one to the weapon. These burial customs were characteristic of the Alans of the Hun period