Comparative estimation of the developed information technologies for modern computer vision systems

Оцінено актуальність розробки з існуючими підходами до збільшення роздільної здатності при отриманні зображення. Показано переваги запропонованого принципу при використанні у специфічних галузях. Показано результати аналізу проведеного на базі експериментів, який підтверджує, що запропонований метод має перевагу (ціна–якість) над приладами із зарядним зв’язком (матрицями ПЗЗ) при використанні повного діапазону його можливостей, тобто при надвисоких роздільних здатностях у спеціальних предметних областях. Наприклад, при мікробіологічних дослідженнях потрібна роздільна здатність може бути досягнута тільки при реалізації високих вимог до ПЗЗ елементів і відповідно до дорогих систем охолодження. У роботі показано технологію отримання образів.The relevance of existing development approaches to increase the resolution of imaging is evaluated in the paper. The choice of method of entry into digital images at high resolution for further processing is particularly relevant in terms of price-quality-subject area. The advantages of the proposed principles for use in specific areas are shown. Results of analysis conducted on the basis of experiments confirming that the proposed method has the advantage (price-quality) over charge-coupled devices (CCD matrix) using the full range of its capabilities, ie, at very high resolution in special subject areas is shown. For example, in microbiological studies required resolution can only be achieved in the implementation of high demands to the CCD elements and therefore to expensive cooling systems. The technology with dynamic resolution (scale quality-speed) for input images is demonstrated. Technology is based on the electron vacuum tube. Studies and tests of the actual input images (cell) sites testified that the application of the method of program- controlled raster, new schemes and technical solutions, modern components and techniques of modern digital signals processing allow to build on the basis of their effective input images in computer vision systems. The relevance of the proposed technology on existing alternative approaches is shown in this paper. The analysis is conducted according to the criterion of price and quality. Area of the most efficient use of the technology is proposed. Efficiency of technology is increased with the increasing requirements, such as sensitivity and resolution. The research laid the basis for the creation of non integrated systems of video-data entry, which will maximize the sensitivity up to limit opportunities

The effect of an external magnetic field on the maximum current of SNINS junctions near the critical temperature

The behaviour of superconducting junctions of SNINS-type (where S is superconductor, N is normal metal, I is insulator) with anharmonic current-phase relations in the external magnetic field near the critical temperature was investigated. The dependence of the maximum current on the value of the magnetic flux in a wide range of electron transmission coefficient values was considered. Also, it was investigated how the presence of a normal layer of an arbitrary thickness in the scale of coherence length and in the presence of impurities in superconducting regions affect the sensitivity of the maximum current to the magnetic field magnitude.Comment: 7 pages, 4 figure

Morphological and functional changes in the rabbit iris and ciliary body in experimental hypopinealism

Background: Previous morphological studies have found degenerative retinal abnormalities in experimental hypopinealism. It is important to determine the morphology and function of the iris and ciliary body in prolonged pineal gland dysfunction with melatonin deficiency. Purpose: To determine the morphology and function of the iris and ciliary body in rabbits maintained under conditions of prolonged around-the-clock illumination leading to hypopinealism and melatonin deficiency. Material and Methods: Fifty five adult rabbits (110 eyes) were used in this experimental study. Animals were divided into two groups, an experimental group of 32 animals maintained under conditions of around-the-clock illumination to induce functional hypopinealism, and a control group of 23 animals maintained under natural day/night cycle conditions. Both groups were subdivided into 5 subgroups based on the duration of the experiment: 1-2 months, 3-5 months, 8-12 months, 18-19 months, and) 26-28 months. Blood melatonin levels were assessed by an enzyme-linked immunosorbent assay. A comprehensive morphological study of rabbit iris and ciliary body specimens was conducted. Results. Blood melatonin level at night time in the experimental group was almost six-fold lower than blood melatonin level in the control group. In animals maintained under conditions of around-the-clock illumination, marked circulatory abnormalities with markedly dilated and hyperemic vessels were observed in the iris and ciliary body at time points until 12 months. In addition, at 12 to 28 months, iris and ciliary body vascular circulatory abnormalities appeared to be changed by sclerotic abnormalities. In animals exposed to around-the-clock illumination, vascular sclerotic changes appeared substantially earlier, and were much more marked, than in control animals. The mean vascular wall thickness (VWT) in iris and ciliary body specimens for the experimental group was 1.5-fold higher than that for the control group (177.5 ± 7.3×10-6 m vs 101.9 ± 4.4×10-6; р < 0.05) at 18 to 19 months, and twice higher than that for the control group (217.4 ± 8.7×10-6 m vs 107.2 ± 5.2 ×10-6 m) at 26 to 28 months. The like newly formed rough bundles of collagen fibers found in an analogue of the Schlemm canal may exert a very negative effect on hydrodynamics of the eye

Adjacent channel co-existence study between 5G NR and Wi-Fi in the 6 GHz band for indoor scenario

Base stations (BS) radiation is the main source of electromagnetic background generated by mobile (cellular) communications. The known technique for estimating an average intensity of background generated by BS radiation takes into account the directivity of BS antennas in a simplified form, assuming that the width of the main lobe of the radiation pattern is equal to the width of BS servicing sector and not taking into account the radiation directivity in vertical plane. Noted simplifications determine too pessimistic nature of these estimations. The paper contains results of the refined analysis of this problem using a two-level models of antenna radiation patterns, which give the actual values of the width of antennas main lobe in horizontal and vertical planes, the relative levels of side lobes and the ratio of radiation power of the main and side lobes. The analysis was performed both for stationary sector antennas of cellular communication systems and for adaptive phased antenna arrays of 4G/5G systems capable of providing service using narrow beams. Obtained results reduce by 5-15 dB the degree of pessimism provided by known techniques in the estimation of the average levels of electromagnetic background created by BS radiations near the Earth's surface

Oxidative DNA damage in lung tissue from patients with COPD is clustered in functionally significant sequences

Lung tissue from COPD patients displays oxidative DNA damage. The present study determined whether oxidative DNA damage was randomly distributed or whether it was localized in specific sequences in either the nuclear or mitochondrial genomes. The DNA damage-specific histone, gamma-H2AX, was detected immunohistochemically in alveolar wall cells in lung tissue from COPD patients but not control subjects. A PCR-based method was used to search for oxidized purine base products in selected 200 bp sequences in promoters and coding regions of the VEGF, TGF-β1, HO-1, Egr1, and β-actin genes while quantitative Southern blot analysis was used to detect oxidative damage to the mitochondrial genome in lung tissue from control subjects and COPD patients. Among the nuclear genes examined, oxidative damage was detected in only 1 sequence in lung tissue from COPD patients: the hypoxic response element (HRE) of the VEGF promoter. The content of VEGF mRNA also was reduced in COPD lung tissue. Mitochondrial DNA content was unaltered in COPD lung tissue, but there was a substantial increase in mitochondrial DNA strand breaks and/or abasic sites. These findings show that oxidative DNA damage in COPD lungs is prominent in the HRE of the VEGF promoter and in the mitochondrial genome and raise the intriguing possibility that genome and sequence-specific oxidative DNA damage could contribute to transcriptional dysregulation and cell fate decisions in COPD