year 2018

Analysis of the ergonomic quality of e-learning through statistical methods

A key factor in e-learning in the future will be a quality orientation that firstly places learners or users of education services. They have to take the lead in terms of quality concepts of e-learning, since their professional competence ...  read more

Modelling of E-beam crosslinking of composite hydrogels

Response Surface Methodology and robust engineering approach were applied for the investigation of preliminary experimental data related to the synthesis of composite biopolymer-based hydrogels via electron beam (e-beam) radiation cross-linking. ...  read more

Dispersed and layered volumetric nanocrystalline materials based on copper and molybdenum condensed from the vapor phase

The paper presents features of structure formation and phase composition on copper and molybdenum based composite materials, condensed from the vapor phase. Three types of condensed composite materials with thicknesses from 0.8 to 5 ...  read more

Electron beam modification of the Grade 2 titanium surface after ionplasma nitriding

The change of structure of Grade 2 titanium subjected to ion-plasma nitriding at 850 ℃ for 5 hours in a gas atmosphere consisting of pure argon at the heating stage, and Ar + N2 in the soaking stage, after electron-beam exposure are investigated.

Applied voltage dependence of plasma characteristic for food sterilization using PBII method

We used the PBII (Plasma Based Ion Implantation) method with self-igniting plasma and negative high-voltage pulsed power supply only to calculate the ion density inside a formed ion sheath based on a modulation circuit, by measuring ...  read more

Optimum conditions for sterilization of Geobacillus stearothermophilus spores using plasma-based ion implantation

In recent years, substantial research into low-temperature sterilization techniques has been conducted. Plasma-based ion implantation (PBII) is a low-temperature, cost-effective technique for sterilizing medical equipment, containers, ...  read more

Experimental study on sterilization of food with self-igniting plasma formed from liquid using plasma-based ion implantation

We attempted to sterilize food using plasma-based ion implantation with self-ignited plasma formed from liquid. Based on sterilization experiments, hydrogen peroxide was selected to generate self-ignited plasma. The most effective pulse ...  read more

Control of plasma parameters by Penning ion effect

We attempted to control the density of oxygen ions by adding argon gas and helium gas with metastable voltage to oxygen gas with ionization voltage, in order to determine the optimum combination and ratio of gases for food sterilization. ...  read more

Contact characteristic for Iridium-coated probe

This study considers the issue of higher probe contact resistance associated with oxidation of Al attached to the probe surface. In an experiment involving Al electrodes, there was virtually no increase in contact resistance after 185,000 ...  read more

Preliminary simulation of Magnetron sputtering using Pegasus software

In an r.f.-d.c. coupled magnetron sputtering system, the magnetron discharge was generated by a 13.56 MHz r.f. source, and a d.c. power was simultaneously applied to a tin target through a low-pass filter in order to control the incident ...  read more