Sz. Berczi

Symmetry and technology in ornamental art of old Hungarians and Avar-Onogurians from the archaeological finds of the carpathian basin, seventh to tenth century A.D.

Earlier investigations [1] have revealed that mirror double frieze types were used in the ornamental art of the Old Hungarians, on archaeological finds from the tenth century A.D. On archaeological finds from the Avar-Onogurian times (seventh to ninth century A.D.) a rich variation set of double frieze patterns has been discovered by the author. Over mirror reflection, half turn and simple translation also occur as doubling operations of ornamental friezes on belt buckles, the main finds of the Avar-Onogurian archaeology. After the elaboration of the mathematical background of all kinds of double friezes built from a simple element, the possible technological roots of these ornamental inventions have been discussed and their relations to the plane symmetry patterns summarized. The suggestion, that double friezes were cut out of plane symmetry patterns made mainly by weaving makes the technological origin of these ornamental structures probable. The structural classification of ornamental adornations has been used in a comparison of different cultural communities. Both the frequency of occurrence of different frieze, double frieze and plane symmetry structures and the inventive developments of basic (natural) patterns are characteristic to cultural communities. Examples of the survival of structures and the distribution of m-g structure from the supposed Pontusian Greeko-Scythian source region have been shown.

Astrobiological characteristics and possibility of life in the polar dark dune spots of Mars

The circumpolar region of Mars was surveyed for possible habitats in the area of seasonal ice cap. Dark Dune Spots were found to be good candidates as they are covered by water ice there without carbon-dioxide ice, and show flow-like features in springtime. Based on theoretical calculations interfacial water or bulk brine may be present there that decomposes the aggressive oxidants. Temperature values in springtime around noon could be favorable for metabolism of known extremophyles on Earth, and water uptake may be possible at nighttime. During the warm daytime period the water loss could be lowered by densely packed grain structure of the soil, hygroscopic salts, and polysaccharide-like materials, as it was observed in the samples of cryptobiotic crust from hot and cold deserts on Earth. This work outlines the basic elements of these possible circumpolar microhabitats.

Scanning Electron Microscope‐Cathodoluminescence Properties of Fayalite and Forsterite from Kaba CV3 Chondrite: Application to Mineralogy of IDPs

We studied Kaba carbonaceous meteorite samples using Scanning Electron Microscope‐Cathodoluminescence (SEM‐CL) images and spectroscopy to document fayalite and forsterite minerals that could be used in the Interplanetary Dust Particle (IDPs) studies.

Parallel Port functionality enhancement for HUNVEYOR-4 robotic space probe

Oftentimes robot enthusiasts use the 8-bit parallel port to control their devices. But what if the eight bits are simply not enough? The parallel port multiplier, developed for HUNVEYOR-4, is able to maintain up to 32 output bits. We also worked out a method and a device, reading back four analogue and seven additional digital values into the educational space probe, using only eight output bits and two status bits.