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The paper considers a purpose and features of ontologies use in describing of subject area, both from a theoretical and an applied point of view. Criteria for identifying ontologies types are indicated. Based on cognition schematism principles, a knowledge representation ontologies system has been developed, that combines language, forms of knowledge representation and process schemes. It is shown that it is exactly such a system of ontologies makes it possible for the practical use of ontologies in computing environments.

At present, it is highly relevant to improve the safety of transport and pedestrians by crossing their paths at different levels. At the same time, to cross wide highways, it is rational to design pedestrian bridges without intermediate supports, namely suspension and cable-stayed bridges. In addition, numerous studies have confirmed the feasibility of using fiber-reinforced plastic (FRP) as a material for load-bearing structures. However, in order to massively introduce FRP suspension bridge designs into production, it is necessary to improve the method of designing suspension bridges, which has been used mainly on steel and reinforced concrete bridges for decades. Therefore, the paper describes theoretical and experimental studies of strength, flexural stiffness (calculations are made taking into account geometric nonlinearity), as well as the aerodynamic stability of structures of single-span suspension bridges with main beams made of polymer composite materials. As a result of the research, the feasibility of designing FRP bridge structures within the framework of the adaptation concept was confirmed. The obtained conclusions will serve to improve the method of calculating suspension bridges with main beams made of polymer composites.

The article discusses the main trends in the print media market over the past 10 years. The authors deal with the most topical problems of print media related to the necessity of restructuring traditional forms of editorial work in the context of the information revolution, the search for new ways of attracting target audience, and the increasing competition between the press and new electronic media. The study shows that these challenges have required prompt transformation in the work, which a number of traditional media have failed to do. As a result, they had to either reduce the covering or stop printing the copies. This trend is typical of both foreign and Russian print media. In the process of transformation and optimization of content production costs, print media have faced a number of companion problems caused by the increasing intensification of journalist work in convergent editorial offices, competition between professional journalists and freelance employees, and getting an optimal balance between profitability of the publications and quality of the media content.

The article deals with the scantily explored area of Russian journalism – the publishing of Newspapers of law enforcement agencies, issued to inform the soldiers who were carrying out tasks under special conditions – in the aftermath of the Chernobyl accident in 1986, during the restoration of constitutional order in Chechen Republic in 1994–1996 and in counter-terrorism operations in the North Caucasus in the 2000s. The article considers the prerequisites for the establishment of these media peculiarities of functioning of editorial teams in a complex, little predicted environment, key topical complexes of the investigated publications in the specified historical period. The research is based on the historical method and the comparative method and content analysis were also applied. The study data were obtained, indicating that the personnel of the power structures involved in elimination of consequences of techno genic accidents in the suppression of internal armed conflict, is in dire need of systematic objective information about current events in the region and the country as a whole. Important role in informing military personnel in these circumstances plays specially issued printed media, production of which is performed by professional military reporters directly on the scene. In addition, the production of such papers contributes to the strengthening of the morale of soldiers and officers who perform their duties with life risk. The results given in the article are based on the works of Russian scientists, legal documents regulating activity of the internal troops and members of the media while performing their duties in special circumstances, on examination of departmental papers in the specified historical period and also their own practical experience of the author as a correspondent of the departmental newspaper of the internal troops, published in the special conditions.

The article defines the role and place of departmental mass media in the system of information support of internal troops the main power component of the Ministry of Internal Affairs of the Russian Federation in 1992–2016 in ensuring law and order and internal security of the state. Special attention is paid to the activity of periodical press of internal troops to inform soldiers who took part in counter-terrorist operations in the North Caucasian region of Russia. The peculiarities of the activities of the departmental mass media of the Interior Troops of the Russian Ministry of Internal Affairs are studied by defining the main stages of their development, the most important thematic areas, revealing, in addition to information and educational functions of these publications, the specifics of military journalists’ work to collect material in hot spots. As a result of the study, data were obtained indicating that the departmental print media played an important role in the system of information support for the internal troops and contributed to the strengthening of the moral and psychological condition of military personnel and, as a result, to the successful performance of tasks of the internal troops to combat gangs in the North Caucasus. The results given in the article are based on the pieces of work of domestic researchers, regulatory legal acts of Russian legislation, as well as publications of departmental mass media, the author’s own practical experience as a correspondent of departmental mass media of the internal troops.

Psychosis is associated with distorted perceptions and deficient bottom-up learning such as classical fear conditioning. This has been interpreted as reflecting imprecise priors in low-level predictive coding systems. Paradoxically, overly strong beliefs, such as overvalued beliefs and delusions, are also present in psychosis-associated states. In line with this, research has suggested that patients with psychosis and associated phenotypes rely more on high-order priors to interpret perceptual input. In this behavioural and fMRI study we studied two types of

Study contains analysis of spatial arrangement reinforcement structure forming process of semi-finished composite billets. Modified technology of tufting opportunities for industrial use introduced. It may allow to appear wide application a new class of spatial arrangement reinforcement composites – thick-walled materials with adjustable anisotropy and physic-mechanical properties same to convenience laminated composites. Application of presented thick-walled laminates spatial arrangement reinforcement technology will allow production preforms with increased density. Experimentally usage of modified tufting technology approved in carbon–carbon composite transverse preform reinforcement application. Tufting step 5x5mm, preform thickness 50 mm, 0.793 kg/m3 preform density reached. Modified technology have shown much less fiber damage compare to convenience KSL-tufting.

VO2max (maximal oxygen consumption), a validated measure of aerobic fitness, has been associated with better cerebral artery compliance and measures of brain morphology, such as higher cortical thickness (CT) in frontal, temporal and cingular cortices, and larger grey matter volume (GMV) of the middle temporal gyrus, hippocampus, orbitofrontal cortex and cingulate cortex. Single sessions of physical exercise can promptly enhance cognitive performance and brain activity during executive tasks. However, the immediate effects of exercise on macro-scale properties of the brain’s grey matter remain unclear. We investigated the impact of one session of moderate-intensity physical exercise, compared with rest, on grey matter volume, cortical thickness, working memory performance, and task-related brain activity in older adults. Cross-sectional associations between brain measures and VO2max were also tested. Exercise did not induce statistically significant changes in brain activity, grey matter volume, or cortical thickness. Cardiovascular fitness, measured by VO2max, was associated with lower grey matter blood flow in the left hippocampus and thicker cortex in the left superior temporal gyrus. Cortical thickness was reduced at post-test independent of exercise/rest. Our findings support that (1) fitter individuals may need lower grey matter blood flow to meet metabolic oxygen demand, and (2) have thicker cortex.

The paper considers approaches to ontologies using in task of requirements tracing. It is stated that for successful requirements management it is necessary to reveal the image of rational activity object, not its individual properties. In this approach requirement is defined as an aspect projection of some object ontology onto considered subject area in the system purpose context. A model of the activity object ontology, as a system of functionally and logically interrelated concepts, quantities and methods, is developed. Proposed model combines an ontology of quantities and measures and an ontology of means, “technologies” of assessment. Such model makes it possible to describe processes occurring in the system in more detail, and in combination with other ontologies (ontology of an activity life cycle stages, properties ontology, certain project ontology constructed by project documentation), it allows to obtain tools for more efficient requirements revealing, understanding of causal relationship in their changing and management.

Urban forests have great ecological value as facilities for maintaining a favourable environment for the life of citizens. The development of industrial production and increased traffic flows lead to air pollution in cities, which contributes to a decrease in the productivity of tree stands, an increase in their decline and a decrease in their growth. The aim of this paper is to analyze the growth and productivity of larch stands under different anthropogenic influences and to develop recommendations for increasing their stability and durability. The materials for the study were data from the repeated measurements of permanent inventory plots at the Experimental Forest District of the Russian State Agrarian University – Moscow ‘Timiryazev’ Agricultural Academy and forest areas of the Moscow Region. The growth of stands of mean height in the permanent inventory plots does not correspond to the scale of site class determination: first, the forest site index is upgraded, and then it is declined. The results of the analysis of growth and productivity of larch stands have shown that these trees can be recommended for use in urban landscaping as they demonstrate high resistance to adverse effects. Mixed pine-larch stands are the most promising for urban landscaping. Key words: Larch stands, urbanized environment, growth, productivity.

The method of the synthesis of multi-channel decentralized variable structure system for the control of quadrotor spatial motion is developed in this paper. The control law based on the formation of the sliding mode in the separate subsystems of each coordinates control is formed. Each subsystem includes two loops for Cartesian coordinates and relevant Euler angles control. The conditions of the existence of stable sliding mode are obtained. These conditions take into account essential dynamic reciprocal effect between all control channels. The application of proposed control law provides high control quality and maximal fast-action at any variations of the quadrotor parameters within given ranges. This control law does not require the identification of changing object parameters. Efficiency of synthesized control system is confirmed by numerical simulation results. The control system can be realized in the real time by simple technical means.

The article presents the concept and test results of the hybrid electromagnetic suspension for levitation of highspeed vacuum transport. The given approach allows minimizing the energy consumption needed for vehicle levitation system. The model tests for the proposed system have been performed and proved the prospective application of the hybrid electromagnetic suspension for levitation system.

Городские леса имеют большую экологическую ценность как объекты по поддержанию благоприятного состояния окружающей среды для жизни горожан. Развитие промышленных производств, увеличение потоков автотранспорта приводят к загрязнению воздуха городов. С возрастанием негативных воздействий происходит снижение продуктивности древостоев, усиливается отпад, уменьшается прирост. Материалы долгосрочных наблюдений на постоянных пробных площадях Лесной опытной дачи РГАУ-МСХА имени К.А. Тимирязева показывают, что бонитетная шкала не отражает всего многообразия возможных траекторий роста сосновых и лиственничных древостоев: сначала происходит повышение класса бонитета, а в дальнейшем его снижение. Высокую устойчивость в условиях урбанизированной среды проявляют лиственничные древостои, что даёт им преимущество перед сосновыми при использовании в городском озеленении. Перспективными в условиях городов являются смешанные сосново-лиственничные культуры со вторым ярусом из широколиственных пород, которые улучшают выполнение насаждениями средообразующих, защитных, санитарно-гигиенических, рекреационных функций. Сосна компенсирует низкую продуктивность лиственницы в молодости, а к моменту полного разрушения соснового элемента леса лиственница формирует максимально продуктивные древостои. Кроме того, лиственничный элемент леса имеет преимущество в продуцировании кислорода, а сосновым элементом леса выделяется наибольшее количество летучих соединений.

We experimentally demonstrate multigigabit capacity bidirectional hybrid fiber-wireless systems with RF carrier frequencies at the W-band (75–110 GHz) that enables the seamless convergence between wireless and fiber-optic data transmission systems in access networks. In this study, we evaluate the transmission performances in two scenarios: a fiber-wireless access link that directly provide high-speed connections to wireless end users, and a fiber-wireless-fiber signal relay where a high capacity wireless link can be used to bridge two access fiber spans over physical obstacles. In both scenarios, we compare the transmission performances in terms of achievable wireless distances with and without using a high-frequency electrical power amplifier at the wireless transmitter. A downlink 16-Gbit/s QPSK signal and an uplink 1.25-Gbit/s ASK signal transmission over the two implementations are experimentally evaluated in terms of bit-error-rate (BER) performance. Results show that the use of the power amplifier can extend the wireless distance from ∼1 m to over 15 m in an indoor environment with BER performance within the 7% FEC threshold.

We report on the performance of channel and source coding applied for an experimentally realized hybrid fiber-wireless W-band link. Error control coding performance is presented for a wireless propagation distance of 3 m and 20 km fiber transmission. We report on peak signal-to-noise ratio performance of several encoded high-definition video sequences constrained by the channel bitrate and the packet size. We argue that light video compression and low complexity channel coding for the W-band fiber-wireless link enable low-delay multiple channel 1080p wireless HD video transmission.

Simultaneous 60-GHz radio over fiber upconversion and fiber transmission of lightwaves produced by an external cavity laser, a distributed feedback laser, and a C-band vertical cavity surface emitting laser are demonstrated. The 1.25-Gb/s data are transmitted concurrently on each of the lightwaves attaining a bit error rate performance

The next generation of information technology demands both high capacity and mobility for applications such as high speed wireless access capable of supporting broadband services. The transport of ...

Demonstration and comparison study for V-and W-band real-time high-definition video delivery in diverse fiber-wireless infrastructure

New methods of the synthesis of multi-dimensional robust and adaptive control systems for the centralized control of the spatial motion of autonomous underwater vehicles (AUV) is developed in this paper, such as variable structure system (VSS) and self-adjustment system with reference model. The conditions of the sliding mode existence and the self-adjustment process stability with the presence of essential dynamic reciprocal effect between all control channels are obtained and strictly proved. The application of synthesized discontinuous control provides the high control quality at any variations of the object parameters within the given ranges.

In this paper, we review our experimental and simulation work on 28- and 56-Gbaud PAM4-based 100Gbps and 400Gbps short-haul links, including 10, 40, and 80km transmission distances. We also discuss the system performances, limitations, and areas of improvement for these links and their future applications.

Author suggests a toolkit of implementation of product policy in conjunction with the company's cost management tools. A definition of "extraordinary" limited resources, and method of it identifying have proposed. The mechanism of structural changes in the company's product portfolio has a priority.

Author of the article proposes a modeling development concept designed for an organization, with a set of descriptive and prescriptive development models. Formulation of assessment and strategy planning procedure in applying both economic proportions and economic indicators like: sales, company resources, expenditures. The emphasis places on association of stability development and the internal proportionality of the organization.

The variable structure system with control signal saturation for the position control of second order dynamic object is considered in this paper. The features of system phase trajectories and transition processes at different values of control law coefficients are analyzed. The new conditions of a sliding mode existence in the given areas of a phase plane are formulated. The control systems parameters ensuring the greatest possible fast-action and high dynamic precision are determined. The received conclusions are confirmed by results of control system numerical simulation.

By using an N×M multicast switch, where N is expandable from 4 to ≥16, and M is 16, we experimentally demonstrate that in a metro optical network with OSNR ≥17dB, the sensitivity of an intradyne coherent receiver can reach < −34dBm for 28Gbaud DP-QPSK signals, thereby enabling a CDC ROADM with no drop-side EDFAs.

We propose an approach for dynamic channel allocation and multicast data delivery inside the 60 GHz unlicensed band. Channels, conveying 1.25 Gbps signals, can be allocated on demand by tuning the frequency sweep of an external cavity laser (ECL) either in the optical remote node (RN) or in the central office (CO). At the RN, we perform the replication of the original channel suitable for closely spaced multicast applications such as high definition (HD) video delivery where RN serves as a photonic radio frequency (RF) generator for both channel allocation and multicast. Experimental demonstration is presented with bit error rate (BER) performance below 10-9 for original and replicated channels after transmission through 22.8 km of standard single mode fiber (SSMF).

We propose a simple wireless access point for hybrid access networks and experimentally demonstrate bidirectional operation in W-Band. Photonic up-conversion and electrical downconversion are used in the downlink, while in the uplink both up- and down-conversion are conducted by electrical means.