Bevezetés a "Természetfilozófiai előadások a tudat és az élet alapproblémáiról" című műhöz

1908-ban jelentek meg német nyelven Palágyi Menyhért természetfilozófiai előadásai a tudat és az élet alapproblémáiról. (Melchior Palágyi: Naturwissenschaftliche Vorlesungen über die Grundprobleme des Bewusststeins und des Lebens, Charlottenburg: Verlag Otto Günthner, a belső borítón: 1907, a külső borítón: 1908.) A jelen szöveg a mű Palágyi által írt bevezetésének magyar nyelvű fordítása, melyben a filozófus tömören összefoglalja az előadásokban részletesebben kifejtésre kerülő elméletét az élet és a tudat, az érzékelés és az észlelés, a képzelet és a megismerés viszonyáról

A 3D parallel shrinking algorithm

Shrinking is a frequently used preprocessing step in image processing. This paper presents an efficient 3D parallel shrinking algorithm for transforming a binary object into its topological kernel. The applied strategy is called directional: each iteration step is composed of six subiterations each of which can be executed in parallel. The algorithm makes easy implementation possible, since deletable points are given by 3 x 3 x 3 matching templates. The topological correctness of the algorithm is proved for (26,6) binary pictures

Green Function Simulation of Hamiltonian Lattice Models with Stochastic Reconfiguration

We apply a recently proposed Green Function Monte Carlo to the study of Hamiltonian lattice gauge theories. This class of algorithms computes quantum vacuum expectation values by averaging over a set of suitable weighted random walkers. By means of a procedure called Stochastic Reconfiguration the long standing problem of keeping fixed the walker population without a priori knowledge on the ground state is completely solved. In the $U(1)_2$ model, which we choose as our theoretical laboratory, we evaluate the mean plaquette and the vacuum energy per plaquette. We find good agreement with previous works using model dependent guiding functions for the random walkers.Comment: 14 pages, 5 PostScript Figures, RevTeX, two references adde

Genetic variability of astaxanthin-producing yeasts: random amplified polymorphic DNA (RAPD) analysis of Phaffia rhodozyma and Xanthopyllomyces dendrorhous

Astaxanthin (3,3'-dihydroxy-b,b-carotene-4,4'-dione)-accumulating yeasts are of great biotechnological interest. Random amplified polymorphic DNA (RAPD) analysis involving 5 primers and 13 astaxanthin-producing yeast strains was performed. Cluster analysis based on RAPD markers differentiated isolates of Xanthopyllomyces dendrorhous (self-sporulating) and Phaffia rhodozyma (asexual) at an intraspecific level. Strains considered to be derived from the same isolate, but which had had different strain histories, revealed significant differences in their RAPD patterns. The applicability of RAPD analysis for the species-level differentiation of these yeasts is discussed