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Relevance. If we reduce the treatment exclusively to the eradication of Helicobacter pylori (Hp), the question of monitoring the results of anti-Hp therapy is controversial, given the widely known data on the detection of Hp, including virulent strains of Hp, in most healthy individuals.The aim of the study: to track the dynamics of stomach colonization with various Hp strains in patients with gastric ulcer and duodenal ulcer (PUD) immediately after the use of standard three-component anti-Hp therapy (AHT) and 1.5–2 months after AHT.Methods. Genotyping of Hp strains was carried out by the VNTR method together with the determination of the cagA gene.Results. Assessment of the results of AHT in the form of «eradication of Hp — re-detection of Hp» (i. e., without taking the determination of Hp strains into account) showed less reliability in the differences than the «eradication — preservation of the strain or change of the strain» score in patients with PUD; in addition, the differences between the initial bacteriological picture and that observed immediately after AHT were on the verge of reliability, while the differences between the initial bacteriological picture and that observed after 1.5–2 months had a high degree of reliability. The number of eradications increased (eradication achieved immediately after AHT was not preserved, except for one) and the number of cagA-containing strains decreased (due to new eradication detected at late follow-up periods and due to a change in strains) in long-term follow-up in patients with PUD.Conclusion. Since all patients with PUD achieved clinical remission, which lasted for the next 1.5–2 months, the success of AHT should not be unambiguously associated with the eradication of Hp; the restoration of the organism's colonization resistance to Hp after a course of therapy is more likely.

Using LED technologies to create a comfortable light environment for human life and work can help reduce electricity consumption while maintaining, and usually improving, the energy and spectral parameters of lighting systems. At the same time, LED lighting systems for residential and industrial buildings are usually powered by electricity generated mainly by thermal power plants. Such plants mostly use fossil fuels and their combustion leads to environmental pollution. The article proposes the concept of a lighting system, which allows improving the ecology by reducing the energy consumption of lighting systems through the use of renewable energy sources. The proposed operation algorithm of the system for power supply control of LED light sources allows selecting the most appropriate energy sources in real time, thus making it possible to increase the luminous efficiency of the lamp by at least 20% when using industrial element base. This design can help to move away from traditional energy storage systems (batteries), which significantly increases the service life of such systems, their reliability and environmental safety. Placing photovoltaic converters in close proximity to the consumer (on the roofs and facades of buildings) ensures a decrease in ohmic losses and creates favorable conditions for using solar energy to light residential and industrial premises with LED lamps, which can significantly increase the economic and energy efficiency of such systems.

The authors propose fundamentally new design-technological solutions for compact volumetric mirrorized LED modules with increased power. Test samples of volumetric light-effective LED light effective modules with a power of 10—15 W and light output of 105—160 lm/W for domestic retrofit lamps based on high-efficiency SMD, mini COB, and COB LEDs of third generation were manufactured and tested. Positive technical and practical results were obtained by increasing by over 4—6 times the size of holders — heat sinks (compared to LED modules of flat holders) for heat dissipation from the LEDs by conduction and heat radiation, as well as by increasing light efficiency of LED lamps due to the additional light re-reflection by mirrorized reflectors-radiators in the bulb which is diffuser of the lamp light.

The structure of a device for the cutting and deformation of cylindrical shaft surfaces in jets of specially selected technological fluids is described and investigated.

We present a setup and procedure of studying p-n j unction-package thermal resistance in high-power light-emitting diodes (LED s) from their thermal relaxation. A set of LEDs mounted on a metal-core printed circuit board (MCPCB) were studied. The contributions to the total thermal resistance from a heavy heat sink, MCPCB, heat slug and LED chip are separated.

Existing systems for melting glazed frost on overhead electric transmission lines are analyzed. To prevent the formation of glazed frost, without disconnecting the line, it is proposed to insert an appropriate voltage-boosting transformer into the line. The effectiveness of such a system of preventing the formation of glazed frost in a specific network is demonstrated.

An experiment is conducted on the diffusion of arsenic or phosphorus from an RF plasma into a porous-silicon film intended to serve as a source for the next diffusion step, the film being made by plasma etching or electrolytic anodization. The ultimate goal is to reduce the wafer temperature. It is shown that much lower temperatures are indeed possible with the diffusion technique considered. It is established that doping concentration is more uniform over the wafer surface if pores are arranged regularly, as with porous silicon produced by plasma etching. It is also established that plasma-assisted diffusion is mainly affected by the dispersion of pores in size, total pressure, the partial pressure of the doping agent (AsH3 or PH3), RF power, and wafer temperature. Porous-silicon films doped with As or P by plasma-assisted diffusion could be employed in power devices.

Comparison of electrooptic characteristics of LCD's with orienting structures made by vacuum and non-vacuum methods is demonstrated

The problem of one-dimensional propagation of low-frequency electromagnetic waves in homogeneous ionospheric plasma at an angle to the external magnetic field is examined. An oscillating pulse function is obtained for such waves. The shape of the envelope is determined by the Pedersen conductivity. The oscillation period increases with distance and the angle between the propagation direction and the external magnetic field. The period is determined by the Hall and Pedersen conductivities and varies from tenths of a second to seconds.

Thermal and degradation stability of SiOx aligning films deposited by reactive cathode sputtering (RCS) in glow discharge plasma has been investigated. It is shown that heat treatment and other external factors initiate transformations on the surface of aligning film and formed new conditions on the interface. It is lead to change of easy axis orientation direction of LC molecules and appearance of various defects in the LC aligned structures. The technological ways for increasing of aligning layers durability under influence of external factors has been proposed.© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Technology of SiO:In,Sn aligning films deposited by reactive cathode sputtering (RCS) method is presented. The influence of In, Sn alloy surface concentration in Si cathode target on aligning film properties are investigated by theAFM and optical profilometry methods. The properties of aligning microrelief obtained by RCS method for different In,Sn concentration and by poliimid rubbing method are compared. It was shown that such aligning microrelief can createdefectless and perfect on the microscopic level nematic LC oriented structures.Keywords: reactive cathode sputtering, aligning films, nematic liquid crystal, microrelief, AFM 1. INTRODUCTION In present LCD production a lot of techniques for creation of the planar or tilted homogeneous alignment of liquid crystal molecules (such as vacuum thermal deposition or electron beam evaporation of oxides, rubbing of the polymerfilms, photoalignment, plasma treatment and others [1 — 6]) are using. But these technologies have a lot of imperfections.For example, rubbing of polymer coatings generate of dust particles and high static voltage, mechanical and electricaldamaged ofthe active matrix elements (thin film diodes or TFT), required to use high temperatures (up to 2800C) andlong-term (several hours) processes for imidization. Several years ago, in the Institute of Semiconductor Physics of NASUkraine the essentially new vacuum method for creation ofaligning layers was proposed [7,8]. This method is based onthe reactive cathode sputtering ofsilicon target in glow discharge plasma in argon and oxygen atmosphere [9].In this work investigation results of the new original technology for creation of aligned LC structures based on reactivecathode sputtering (RCS) were presented.

Orienting properties of thin inorganic oxide films created by the method of reactive cathode sputtering in glow discharge plasma are demonstrated. The quality of homogeneous and twist alignment of nematic LC was evaluated by polarization microscopy methods. For comparison of orienting properties of silicon oxide films, the parameter of twist orientation quality was used, and its dependence on technological parameters of sputtering (such as cathode voltage, discharge current density, deposition angle, content of gas atmosphere) was shown. The morphologies of SiOx orienting layers deposited on substrates with different coatings are demonstrated.© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Multi-color surface stabilized reflective cholesteric displays with three primary colors: blue, red and green are investigated. The basic methods for compensation of deviation in electro-optical characteristics for the different concentrations of optically active additive are discussed. Possibility of application of such displays in high information content big LCD boards with passive matrix addressing is demonstrated.

We report the peculiarity of selective reflection from a planar cholesteric liquid crystal layer under the action of a small electric field. Application of a small electric field leads to a reversible transition from monodomain to multidomain textures that have a different angular distribution of reflected light. The mechanism of such transition is discussed.