buletinul institutului politehnic din iaşi bulletin of the polytechnic ...

SIMULATING AND MODELING TURBULENCE AND CHAOS
IN FUSION PLASMAS USING LOGISTIC MAP
BY
VIOREL STANCU, LIVIU BĂDELIłĂ
Abstract. The aim of this paper is to underline the importance of the logistic map
in modeling of turbulence and chaos in fusion plasmas and to present numerical results
concerning the simulation of the transition to turbulence and chaos in plasmas using the
logistic map.
Key words: turbulence, chaos, fusion, plasmas, computer simulation, logistic map.
ON THE EFFECTS OF LOW PRESSURE ARGON PLASMA
TREATMENT ON PVA FILMS
BY
OANA NICULESCU, CRISTINA-DELIA NECHIFOR
Abstract. This study shows the way in which diffusion Argon plasma acts on poly
(vinyl alcohol) films. The set-up consists in a glass chamber in which plasma was obtained
by ionization of Ar atoms as a result of collision with electrons accelerated under a bias
voltage. The films were analyzed using ATR-FTIR, by means of Bruker Vertex 70 type
spectrometer (U.S.), with a diamond crystal having a 6 mm 2 surface. Morphology of these
films was studied with AFM technique at a resolution of 5 µm. Both the morphology and the
physico-chemical properties of the film surface change with treatment time.
Key words: plasma, poly (vinyl alcohol), roughness.
ELECTROMAGNETIC PROPERTIES OF CHIRAL
METAMATERIALS
BY
VALERIU DAVID, MARIANA LATU
Abstract. The paper reports a theoretical study of electromagnetic waves in a chiral
metamaterial. We have obtained the differential equations of the electric and magnetic
component of wave, taking into account the conductivity of the medium and the volume
charge density. Using this equation it is possible to determine the nature of waves (forward,
backward or forward and backward) in the chiral slab.
Key words: electromagnetic waves, chiral, metamaterial, differential equation,
forward wave, backward wave.