Military Academy

About: Military Academy is a based out in . It is known for research contribution in the topics: Population & Context (language use). The organization has 2478 authors who have published 3003 publications receiving 33188 citations.

Negative factors of management activities of the security and defence sector representatives and directions of their overcoming.

Abstract: OBJECTIVE The aim is to substantiate the expediency of performing physical exercises by representatives of the security and defence sector to reduce the negative impact of management activities factors on their state of health. PATIENTS AND METHODS Materials and methods: The peculiarities of professional activities of 82 officers of the National Police and the Armed Forces of Ukraine, who had military and special ranks of "lieutenant colonel", "colonel" and held senior positions (heads of faculties, departments, divisions, services and other units) were studied. Research methods: theoretical analysis and generalization of literature sources, pedagogical observation, interviews, questionnaires. RESULTS Results: It was found that management activities are characterized by a number of negative factors, which negatively affect the body of management level officers. With systematic interference, they significantly worsen the state of officers' health and negatively affect the effectiveness of their management activities. CONCLUSION Conclusions: Physical education has significant potential in improving the efficiency of professional activities of management level officers, strengthening their health and enhancing working ability. The direction of improving physical training of management level personnel is determined as increasing the amount of general physical training, conducting classes with different orientations taking into account the age group, service load and training within the working time pattern.

Hybrid laser—magnetron technology for carbon composite coating

Abstract: Hybrid laser- magnetron deposition system was developed and tested for study of carbon based thin film coatings. Various geometrical configurations and deposition conditions were tested. Films of TiC, TiCN, and SiC were synthesized. Films were fabricated in argon (TiC), in argon/nitrogen (TiCN), or in argon/hydrogen ambient (SiC films). Film properties were studied by SEM, XRD, GDOES, and XPS. Smooth, homogeneous film over the area of 9 cm2 were prepared. Crystalline TiC films were grown at room substrate temperature.

A New Natural Biomaterial: Sheep Dentine Derived Hydroxyapatite

Abstract: Hydroxyapatite (HA) is a particularly attractive material for bone and tooth implants since it does not only closely resemble human tooth and bone mineral but it has also biologically proven to be compatible with these tissues. The applications of pure HA are restricted to non load bearing implants due to the poor mechanical properties of HA. Biomaterials of synthetic HA are highly reliable but the synthesis of HA is often complicate and expensive. Bioceramics of naturally derived biological apatites are more economic. Aim of the present work is to introduce sheep teeth dentine HA material as an alternative source of bioactive biomaterials for grafting purposes. The work was started with such a way that extracted sheep teeth were cleaned. The teeth were calcinated at 850°C in air. It was seen that enamel matter was easily separated from dentine after calcination. The collected dentine parts were crushed and ball milled. The powder was pressed between hardened steel dies to produce samples suitable for compression and microhardness tests. The obtained powder compacts were sintered at different temperatures, specifically 1000, 1100, 1200, and 1300°C in air. Results of microhardness and compression strength (along with the statistical analysis of these results) as well as those of SEM and XRD analyses are presented. In the literature, there is very little information about the mechanical properties of dentine and enamel matter derived from sheep, bovine and human. The highest compression strength value in the present study was measured around 146 MPa (from human dentine derived HA the highest value was almost 60 MPa after sintering at 1300°C). The best microhardness in the present study was found as nearly 125 HV. The results of this study showed that the HA material produced from sheep tooth dentine can be qualified as a promising source of HA needed to produce bioactive ceramics.

Innovative Devops for Artificial Intelligence

Abstract: Abstract Developing Artificial Intelligence is a labor intensive task. It implies both storage and computational resources. In this paper, we present a state-of-the-art service based infrastructure for deploying, managing and serving computational models alongside their respective data-sets and virtual environments. Our architecture uses key-based values to store specific graphs and datasets into memory for fast deployment and model training, furthermore leveraging the need for manual data reduction in the drafting and retraining stages. To develop the platform, we used clustering and orchestration to set up services and containers that allow deployment within seconds. In this article, we cover high performance computing concepts such as swarming, GPU resource management for model implementation in production environments with emphasis on standardized development to reduce integration tasks and performance optimization.

Postbuckling nonlinear analysis of FGM truncated conical shells reinforced by orthogonal stiffeners resting on elastic foundations

Abstract: This paper presents an analytical investigation on buckling and postbuckling of eccentrically stiffened functionally graded thin truncated conical shells subjected to axial compressive load and resting on elastic foundations. Shells are reinforced by rings and stringers attached to their inside. The shell material properties are graded in the thickness direction according to a volume fraction power-law distribution. The change in spacing between stringers in the meridional direction is taken into account. The theoretical formulations based on the Donnell shell theory with von Karman geometrical nonlinearity and the smeared stiffeners technique are derived. The resulting equations, which are a coupled set of three variable coefficients nonlinear partial differential equations in terms of displacement components, are solved by the Galerkin method. The closed-form expressions for determining the critical buckling load and for analyzing the postbuckling load–deflection curves are obtained. The influences of various parameters such as stiffeners, foundations, material properties and geometric dimensions on the stability of shells are considered in detail.