Iskra (Slovenia)

The situation around the Korean Peninsula combines such factors as nuclear weapons, missile defense systems, and huge groups of conventional armed forces concentrated in Northeast Asia. The U.S. administration argues that missile defense’s mission is to counter the threat from North Korean missiles to American and allied troops in South Korea and Japan. Hence, this line of confrontation between the U.S. and DPRK is at the focus of the article. A significant number of experts believe that regional missile defense (theater missile defense, TMD) will only stabilize the situation. The purpose of this article is to determine a possible impact of strengthened TMD architecture of the U.S., South Korean and Japanese forces for the security situation in the region under consideration. The author analyzes scenarios, which are most often discussed by experts, scientists, military, and politicians. The role of the doctrinal guidelines of the DPRK, South Korea and the United States in aggravating the situation in the event of strengthening of the American and allied regional missile defense system in Northeast Asia in the context of a political-military crisis is shown.

This study is a numerical simulation obtained by using Silvaco Atlas software to investigate the effect of different types of dielectric layers, inserted between the channel and the gate, on the performance and reliability of an a-ITZO TFT. Replacing the SiO2 oxide layer with a high-k dielectric layer gives the concept of the electrical thickness, known by the equivalent oxide thickness (EOT) in which the physical thickness (PT) can be increased to improve the device reliability without increasing the effective thickness of the gate dielectric. A range of different high-k dielectric materials was suggested. For low-k SiO2 (k = 3.9), the electrical parameters extracted are: Ci = 3.45 × 10-8 F cm-2, Ion = 2.23 × 10-6 A, Ioff = 2.17 × 10-13 A, Ion/Ioff = 1.02 × 107, EOT = 100 nm, VT = -0.61 V, μFE = 29.75 cm2 V-1 s-1, SS = 7.91 × 10-2 V per decade and Von = -0.95 V. Replacing SiO2 by a high-k dielectric material, such as SrTiO3 (k = 300), leads to effects similar to the effects of reducing the physical thickness of the gate dielectric but without actually reducing this physical thickness. This allows improving the outputs of the a-ITZO TFT as it leads to an increase in Ci, Ion and Ion/Ioff to the values Ci = 2.66 × 10-6 F cm-2, Ion = 2.86 × 10-4 A, and Ion/Ioff = 8.80 × 109, respectively, and the decrease in EOT, Ioff, VT, μFE, SS and Von to the values EOT = 1.3 nm, Ioff = 3.25 × 10-14 A, VT = -0.428 V, μFE = 26.66 cm2 V-1 s-1, SS = 6.12 × 10-2 V per decade and Von = -0.75 V, respectively, without leakage effects.

The purpose. To determine influence of citrates of microelements gained by the methods of nano- technologies upon reproductive function of an organism of cows and rabbits. Methods. Physiological, zootechnical and statistical methods, and nano-technological substances. Results. Activating effect is fixed of citrate of Se (30 and 60 mkg), which was applied in a feed of cows in the first 2 months of lactation, on function of reproduction with decrease of amount of inseminations for 17,4 — 30,4% and service-period for 36,2 — 46,1%. Complex application of citrate of Se in combination with citrates of J, Co, Cr and Zn resulted in decrease of amount of inseminations for 18,2%, and service-period for 28,3 — 29%. Conclusions. Addition in feed compound of cows of citrate of Se in the first 2 months of lactation decreased amount of inseminations and service-period, preserving such action at combination of Se with citrates of J, Co and Zn. Addition in feed of rabbits of citrate of Cr and its combination with sulphate of Na increased resistance and reproductive function of their organism with increase of amount and masses of born rabbits.

This paper presents the results of research investigating the impact of business model factors on cloud computing adoption. The introduced...

This study deals with predicting the dynamic behaviour of the rotor in a claw‐poled, permanent‐magnet (PM) stepper motor. The finite element method (FEM) model of a prototype stepper is used to calculate the magnetic forces on the rotor, where the PM is modelled with an altered geometry approach. This altered geometry helps achieving a realistic magnetic flux density profile and direct PM material property input. The obtained forces are used in the following analysis as the excitation, to simulate the rotor's rotational and also axial movements with the help of proposed system of equations. To validate the introduced modelling approach, a measurement of the rotational and axial movement was performed on a motor with the same geometry and material properties. The results of the simulated movement are in good agreement with the experimental data for the tested motor.

The feasibility of protecting thermally stressed surfaces of gas-transfer units with heat-resistance polyimide paint materials with mineral fillers is explored. Properties of polyimide paint materials containing different fillers are compared. It is demonstrated that of the compositions examined, a paint material based on a PI-LK-2 paint with the addition of 5‐10 wt.% of kaolin, and one based on a PI-LK-1 paint with the addition of 5 wt.% of a chopped basaltic fiber afford the best thermal stability. In transporting natural gas, it is necessary to ensure and maintain basic components of the gas-transfer equipment in good working order. One of the indicators characterizing the operational reliability of gas-transfer units (GTU) is their corrosion resistance. In GTU, the exhaust run and exhaust flue are most subject to corrosion, since these assemblies operate under the most difficult conditions (effect of gaseous flow at temperatures ranging from 380‐450°C, solar radiation, and moisture content. The heat-resistant paint materials (PM) traditionally employed ‐ KO-814, KO-85, and KO-811 applied in five layers ‐ do not provide corrosion protection for these assemblies under atmospheric conditions when they are stored in open areas for two years prior to their assembly. Fabrication of flues formed from corrosion-resistant steel appreciably raises the cost. Moreover, a temper color is formed on the flue, degrading its commercial appearance. The development of new heat-resistant materials satisfying all operating conditions is therefore a critical problem. In compiling PM formulations, the film carrier is the determining component. The properties of the coating can be substantially altered by chemical modification or introduction of another film carrier (as a rule, more expensive), but this is economically inexpedient and labor-intensive, since replacement of the film carrier usually also results in the need to replace other components. A simple and more effective means of regulating PM properties is the introduction of small amounts of different fillers to the formulation. In certain cases, use of fillers is a unique possibility of achieving the properties required. Owing to the high physico-mechanical properties and thermal stability in the 200‐250°C interval, aromatic linear polyimides as a film carrier, and kaolin, milled mica, basalt, and hollow glass microspheres as fillers of mineral origin, are of greatest practical interest. Kaolin is a chemically inert material consisting wholly or partly of alumosilicate kaolinite. Milled and classified grades of kaolin may contain small amounts of related plate silicates (micas, illite, chlorite, smectite) and quartz. The majority of kaolins used in the paint industry are washed to remove these mineral impurities. Kaolin possesses a plane structure, but in contrast to talc and mica, its role in the coating is determined to a larger degree by the contribution to the optical than to the physical properties of the coatings. Kaolins are used to improve thixotropic properties, flowability, leveling properties,

Almost in all modern electronic devices the input power stage is made as switch mode power supply. The switch mode power supplies are mainly consisted from semiconductors and operate at higher frequencies, somewhere from 20 kHz up to some MHz. Cause of its switch mode; they produce a lot of disturbances such as conductive and radiated disturbances. In the article the basic explanation of radiated disturbances origin is presented. It is based on comparison of resonant transmitter and power supply. The emission decreasing is based on definition of transmitter antenna and its blocking. Some practical examples of radiated emission decreasing with different blocking impedance are also presented. As a conclusion of theory and practical founding the capacitor is determined as the basic blocking element. Some other elements could also be added to partly change the radiated diagram.

DFT methodology for active analog filters based on analog scan structures has been proposed previously. The authors describe an extension of the methodology to automatic fault isolation by means of model-based diagnosis performed by the AI tool CLP. The implemented diagnostic algorithm uses results of measurements of magnitude and phase characteristics for a given frequency in the normal mode and in the test modes. The diagnosis is performed incrementally, in each step reducing the set of potential candidates for the detected fault. Presented case study illustrates the approach. >

Measurements of energy storage and heat deposition in flash-lamp pumped Nd:Yb:Er: glass, and Cr:Nd:Yb:Er: glass lasers are reported. Energy storage is determined indirectly by measuring output vs. input energy characteristics of erbium lasers operating in a free oscillation mode. A thermal camera is used to measure temperature increase following isolated flash-lamp pulses. Contributions of different sensitizers are distinguished by spectrally filtering flash-lamp pump radiation. It is determined that in Nd:Yb:Er: glass ytterbium sensitized pumping contributes 85% to the total erbium inverted population energy storage. Long flash-lamp pulse durations are therefore required for efficient Nd:Yb:Er: glass laser operation. Direct erbium, and neodimium sensitized pumping is determined to be relatively inefficient, although the corresponding visible part of the pump spectrum contributes in Nd:Yb:Er: glass as much as 65% of the total deposited heat. Chromium co-doping is observed to significantly increase energy conversion efficiency of pumping in the visible, allowing shorter flashlamp pulse durations in Cr:Nd:Yb:Er: glass lasers. In addition, analysis shows the ratio of the total heat generated per unit stored energy to be in Cr:Nd:Yb:Er: glass lower than in Nd:Yb:Er: glass.