We investigate the average frequency of positive slope ν + α , crossing the height α = h −h in the surface growing processes. The exact level crossing analysis of the random deposition model and the Kardar-Parisi-Zhang equation in the strong coupling limit before creation of singularities are given. PACS: 52.75.Rx, 68.35.Ct.

A new model for plasma behaviour in Filippov type plasma focus (PF) systems has been described and used. This model is based on the so-called slug model and Sing Lee's model for Mather type PF devices. Using the model, the discharge current and its derivative as a function of time, and the pinch time and the maximum discharge current as a function of pressure, have been predicted. At the end, the predicted data are compared with the experimental data obtained through a Filippov type PF facility with a nominal maximum energy of 90 kJ.

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In the present study, the properties of natural clinoptilolite were successfully modified by a glow discharge plasma technique. A thorough characterization was performed to clarify the morphology, chemical composition, and porosity of untreated and plasma-treated clinoptilolites. The scanning electron microscopy images of untreated and plasma-treated clinoptilolites demonstrated that the morphology of clinoptilolite was changed from microparticle to nanorod after plasma treatment. The Brunauer−Emmett−Teller results showed that the plasma treatment has enhanced the specific surface area of clinoptilolite up to 2-fold (treated clinoptilolite 45.16 m 2 /g compared to the untreated one 23.92 m 2 /g). The catalytic performance of untreated and plasma-treated Fe-impregnated clinoptilolites was compared in the heterogeneous Fenton process for the decolorization of a textile dye solution. Results indicated that the decolorization efficiency was significantly increased from 36.93%, in the presence of untreated catalyst, to 97.66% with the use of the plasma-treated catalyst after 35 min of reaction.