Search results for: A. Košak

Items from 1 to 7 out of 7 results

chapter

A fractal, selforganizing map with partially chaotic neurons

A. Kosak, K. Goser

Lecture Notes in Computer Science > From Natural to Artificial Neural Computation > 338-344

A new type of a chaotic neuron is proposed which allows a new, simplified architecture of selforganizing maps. The chaotic neurons are examined with respect to their application in selforganizing maps. A new concept of self-organizing maps with fractal architecture is proposed and its suitability for a VLSI-implementation is examined. It is shown that the efficiency of conventional selforganizing...

article

Nanofiltration membranes modified with alkoxysilanes: Surface characterization using zeta-potential

M. Bauman, A. Košak, A. Lobnik, I. Petrinić, more

Colloids and Surfaces A: Physicochemical and Engineering Aspects > 2013 > 422 > Complete > 110-117

The characterization of nanofiltration (NF) membranes is necessary for predicting their performance under different operating conditions, and for optimizing the membrane-separation process. A thin-film composite (TFC) polymer membrane for nanofiltration, modified with tri- and tetra-alkoxysilanes, was produced using a sol–gel procedure. The surface charges of the modified membranes were determined...

article

In situ synthesis of magnetic MnZn-ferrite nanoparticles using reverse microemulsions

A. Košak, D. Makovec, M. Drofenik, A. Žnidaršič

Journal of Magnetism and Magnetic Materials > 2004 > 272-276 > Part 2 > 1542-1544

Superparamagnetic MnZn-ferrite nanoparticles with a narrow size distribution were prepared at various pH values using precipitation in a reverse microemulsion consisting of hexanol, as an oil phase; surfactant CTAB; and an aqueous solution of metal sulfates. Tetramethyl ammonium hydroxide was used as the precipitating agent and hydrogen peroxide as the oxidizing reagent. The synthesized materials...

article

Preparation of MnZn-ferrite with microemulsion technique

A. Košak, D. Makovec, A. Žnidaršič, M. Drofenik

Journal of the European Ceramic Society > 2004 > 24 > 6 > 959-962

Nanocrystalline MnZn-ferrite particles with different morphology were prepared from single water-in-oil microemulsion consisting of n-hexanol as an oil phase, surfactant CTAB and an aqueous solution of mixed metal sulfates. A sodium hydroxide solution was used as the precipitating agent and a hydrogen peroxide as the oxidizing reagent. The synthesized materials were characterized using an X-ray diffraction...

article

Dispersant-assisted hydrothermal synthesis of MnZn ferrites from raw oxides

M. Drofenik, A. Zcaron;nidaršič, M. Kristl, A. Košak, more

Journal of Materials Science > 2003 > 38 > 14 > 3063-3067

MnZn-ferrite powders were prepared using hydrothermal syntheses of a homogenous mixture of the raw oxides, i.e., Fe₂O₃, ZnO and Mn₃O₄, at 280°C in air. The hydrothermal synthesis was performed in the presence of various amounts of an anionic dispersant. The final results of the hydrothermal reaction between the raw oxides were fine powders with a heterogeneous phase composition mostly composed of...

article

Hydrogen/deuterium-mixtures as a laboratory for the study of the muonic cascade and muon-catalyzed fusion

B. Lauss, P. Ackerbauer, W.H. Breunlich, M. Cargnelli, more

Hyperfine Interactions > 1999 > 118 > 1-4 > 79-88

We have performed an experiment to investigate various processes induced by muons in hydrogen-deuterium mixtures. Preliminary results are given for cascade X-ray yields, q_1s, relative yields of conversion muons and fusion γ-rays, molecular formation and hyperfine transition rates.

article

Muon transfer from ground state deuterium to helium nuclei and its temperature dependence

B. Gartner, P. Ackerbauer, M. Augsburger, W.H. Breunlich, more

Hyperfine Interactions > 1999 > 119 > 1-4 > 103-108

The energy and time distributions of the decay X-rays of excited, metastable, molecular (dµHe)*-resonances were measured. The comparison of the observed energy spectra with calculated ones suggests that decay from the rotational state J = 1 dominates at the investigated conditions. The muon transfer rates from ground state deuterium to the helium isotopes ³He and ⁴He at low temperatures were determined...

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Search results for: A. Košak

A fractal, selforganizing map with partially chaotic neurons

Nanofiltration membranes modified with alkoxysilanes: Surface characterization using zeta-potential

In situ synthesis of magnetic MnZn-ferrite nanoparticles using reverse microemulsions

Preparation of MnZn-ferrite with microemulsion technique

Dispersant-assisted hydrothermal synthesis of MnZn ferrites from raw oxides

Hydrogen/deuterium-mixtures as a laboratory for the study of the muonic cascade and muon-catalyzed fusion

Muon transfer from ground state deuterium to helium nuclei and its temperature dependence

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