Realization of energy-saving control modes on cranes of great load-carrying capacity

Saving energy is highly important for all types of lifting machinery. Research shows that it is possible to reduce energy consumption in mechanism drives at all stages of movement. Energy-saving control has already been implemented on cranes at the Dnister Hydroaccumulating Power Plant. The article describes the conditions and results of the implementatio

Realization of energy-saving control modes on cranes of great load-carrying capacity

Saving energy is highly important for all types of lifting machinery. Research shows that it is possible to reduce energy consumption in mechanism drives at all stages of movement. Energy-saving control has already been implemented on cranes at the Dnister Hydroaccumulating Power Plant. The article describes the conditions and results of the implementatio

Foreign Direct Investment between the EU and EAEU

This study is part of the “Challenges and Opportunities of Economic Integration within a Wider European and Eurasian Space” project, an ambitious undertaking seeking to scope the complex issues and potentials for economic cooperation between the European Union (EU) and the Eurasian Economic Union (EAEU), as well as with third-party countries of the vast Eurasian landmass. It is based on the intense research going on in over 25 countries, including Member-States of both the EU and the EAEU, the United States, China, Japan, Turkey and Ukraine, and on the results of seven international project workshops held at IIASA from June 2013 to April 2016, which discussed and synthesized these analyses. The project workshops were attended by renowned academics and high-level policymakers, including representatives from the European Commission and the Eurasian Economic Commission. This report presents the synthesis of three years of multi-disciplinary work

Nanometer To Millimeter Scale Peptide-porphyrin Materials

AQ-Pal14 is a 30-residue polypeptide that was designed to form an alpha-helical coiled coil that contains a metal-binding 4-pyridylalanine residue on its solvent-exposed surface. However, characterization of this peptide shows that it exists as a three-stranded coiled coil, not a two-stranded one as predicted from its design. Reaction with cobalt(III) protoporphyrin IX (Co-PPIX) produces a six-coordinate Co-PPIX(AQ-Pal 14)(2) species that creates two coiled-coil oligomerization domains Coordinated to opposite laces of the porphyrin ring. It is found that this species undergoes a buffer-dependent Self-assembly process: nanometer-scale globular materials were formed when these components were reacted in unbuffered H(2)O, while millimeter-scale, rod-like materials were prepared when the reaction was performed in phosphate buffer (20 mM, pH 7). It is suggested that assembly of the globular material is dictated by the conformational properties of the coiled-coil forming AQ-Pal14 peptide, whereas that a the rod-like material involves interactions between Co-PPIX and phosphate ion

Research of the Leukocytes Segmentation Method in the Blood Cells Recognition Systems

The paper proposed a method of segmentation of leukocytes from the blood and bone marrow samples. A study of the accuracy characteristics of the method is carried out. The techniques of watersheds and the distances transformation were used as the basis of our segmentation method to achieve optimal segmentation of leukocyte. Proposed method was successfully embedded in the system of automatic recognition of white blood cells for classification of blood cells. Keywords: white blood cells segmentation, cells recognition, watershed method, distance transformation method, acute leukemia

Effect of Saturation on the Viscoelastic Properties of Dentin

This paper focuses on the analysis and quantitative characterization of the effect of saturation on the viscoelastic properties of human root dentin. Uniaxial compression tests under creep conditions have been performed on root molar dentin with tubules fully saturated with a viscous physiological fluid, as well as samples with non-saturated tubules (dry dentin samples). Blair-Rabotnov (BR) fraction-exponential model is used to characterize the overall viscoelastic properties of dentin and correlate them to the level of saturation. Experimental data are compared with theoretical predictions that interrelate the viscoelastic properties of saturated and dry specimens. The results show that saturation increases the viscous creep strains of dentin, which indicates a reduced capacity for stress relief. The uniaxial compression test under creep conditions, in combination with the BR kernel model, allows us to analyze the creep-relaxation behavior of dentin. © 2020 Elsevier Ltd.TC, SS, and IS gratefully acknowledge financial support from National Institute of Health (USA), grant 2R25GM061222-18 . DZ, PP, and MYG gratefully acknowledge financial support from Russian Foundation for Basic Research (Russia), research project No. 18-38-20097

Mechanical Behavior of Polycrystalline Rhenium under 3-Points Bending at a Low Homological Temperature

Mechanical behaviour of polycrystalline rhenium under 3-points bending at such low homological temperature as room is discussed. Two metallurgical technologies (electron beam melting and powder metallurgy) were used for the samples preparation. Fine-grained samples (PM metal) exhibit some plasticity prior the failure, while coarse-grained ones (EBM metal) behave like a brittle solid. The intergranular fracture is the fracture mode of rhenium in both cases. Basal slip and prismatic slip of dislocations are not active in rhenium at low homological temperature, but the grain boundary sliding occurs under these conditions. Therefore, polycrystalline rhenium cannot be machined at room temperature despite the growth of grain boundary cracks are braked in the samples due to grain boundary sliding. © Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 18-19-00217This work is supported by the Russian Science Foundation (#18-19-00217)

The influence of bone substitute material on mechanical properties of trabecular bone in augmentation of intra-articular impression fractures. Experimental study

The purpose was to evaluate the effect of bone substitute materials on mechanical properties of trabecular bone adjacent to the joint. Material and methods A total of 21 female chinchilla rabbits weighing 3-3.5 kg was used for the experimental study. A bilateral impression fracture was simulated in the medial tibial condyle and surgically augmented with one of the bone substitution materials: beta-tricalcium phosphate, xenoplastic material and carbon nanostructures. The animals were sacrificed at 6, 12 and 24 weeks postsurgery. Uniaxial compression test was performed to determine mechanical properties of the tibial fragments. Bone microstructure was evaluated with scanning electron microscopy. Statistical data analysis was performed with nonparametric tests. Results Beta-tricalcium phosphate augmentation of the bone interface led to slow resorption accompanied by formation of adequate high-grade bone tissue with mechanical properties gradually increasing with greater observation time that indicated to the bone substitute integrated well with the host bone of the impression bone defect. Xenoplastic augmentation resulted in rapid resorption accompanied by formation of immature bone with mechanical properties declining at 6 to 12 weeks of observation. Carbon nanostructure augmentation of the bone interface caused perifocal bone resorption and absence of osteointegration with mechanical properties declining at 12 to 25 weeks of observation. © Gilev M.V., Zaytsev D.V., Izmodenova M.Y., Kiseleva D.V., Volokitina E.A., 2018