3-D pit: Linear pottery culture long pit reconstructed through point-cloud analysis

Newly applied method of 3D-point cloud analysis performed in Kamyane-Zavallia, Ukraine, the easternmost LBK site introduced the opportunity to define the walking surface of Neolithic settlement and distinguish stratigraphic units in details using the geoinformational systems and geospatial database as a tools for the object analysis. This raises a number of questions concerning the previous interpretations of Linear Pottery Culture sites in Ukraine and the required accuracy of their archaeological excavation. Moreover, the analysis of stratigraphic units inside the long pit from Kamyane Zavallia had shown the complex and heterogenic process of its refilling

Особливості метаболічних порушень у хворих на грижі поперекового відділу хребта у поєднанні з артеріальною гіпертензією

The combination of arterial hypertension (AH) with the spine pathology is a natural manifestation of connected structural-functional disorders.Aim is to determine the features of metabolic disorders in the organism of patients with hernias of lumbar spine, associated with arterial hypertension (AH), on the base of clinical-biochemical and immunological markers.Materials and methods. The study was carried out in 2016 on the base of SI “Institute of spine and joints pathology, named after prof. M.I. Sitenko, NAMS of Ukraine”. There were examined 37 patients with lumbar spine hernias: 23 – without concomitant pathologies, 14 – in association with AH of 1–2 degrees of І–ІІ stage. The control group – 30 persons, 13 men and 17 women. General protein, glycoproteins, chondroitin sulfates, C-reactive protein, glucose, urea, creatinine, β-lipoproteins, calcium, ALAT, ASAT, CPK, LDG, IL-1, IL-4 and IL-6 were determined in blood serum.Results of research. The content of interleukins in the group of patients with AH was higher than in the group of patients without it. In the group of patients with AH IL-1 was increased in 10,5 times, IL-6 – in 5,3 times that testifies to heavier immunologic disorders in patients with AH. The content of glycoproteins in patients without AH was increased by 55,8 %, in patients with AH – in 2,1 times comparing with control. The content of chondroitin sulfates in patients with hernias without AH was increased in 2,8 times, in ones with AH – in 4 times. LDG was increased, CPK – decreased in both groups. β-lipoproteins in blood of patients without concomitant AH was increased by 44,6 %, in patients with AH – by 67 %.Conclusions. In patients with lumbar spine hernias, associated with AH were observed heavier inflammatory-destructive disorders in the cartilage tissue. The increased content of β-lipoproteins in blood of patients with lumbar spine hernias, associated with AH comparing with patients without it may indicate age disorders of lipids metabolism. IL-1 and IL-6 уin patients with lumbar spine hernias, associated with AH were higher comparing with patients without itУ статті на основі лабораторних маркерів визначено особливості метаболічних порушень: у хворих на грижі поперекового відділу хребта з АГ спостерігалися більш суттєві зміни хрящової тканини. Підвищення вмісту β-ліпопротеїнів, ІЛ-1 та ІЛ-6 у крові хворих з АГ може вказувати на вікові порушення метаболізму ліпідів та імунного статусу пацієнті

Research of the Aerothermopressor Cooling System of Charge Air of a Marine Internal Combustion Engine Under Variable Climatic Conditions of Operation

Research of the Aerothermopressor Cooling System of Charge Air of a Marine Internal Combustion Engine Under Variable Climatic Conditions of Operation / D. Konovalov, E. Trushliakov, M. Radchenko, H. Kobalava, V. Maksymov // Grabchenko’s Intern. Conf. on Advanced Manufacturing Processes. – Odessa, 2020. – P. 520–529.Abstract. Principle of charge air cooling of the internal combustion engine with an aerothermopressor is proposed. It is implemented on the transport ship regular line. Arising thermogasdynamic compression allows increasing the air pressure. The aerothermopressor application in the charge air cooling systems makes it possible to reduce the power consumed by compressors, Nc by 3–10 %, thereby the engine power is increased by 1–3 % and the specific fuel consumption is decreased by 2–4 %. It is established that in case of increasing the ambient air temperature tamb at the turbocharger input the effect from the aerothermopressor used for cooling of the charge air is increased: the turbocharger power reduction DNC is increased with a corresponding increase in engine power and a decrease in specific fuel consumption. The relative (related to air flow) water mass flow is determined, which has to be injected at completely evaporated in a thermal overpressure: 0.02–0.05 (2–5 %)

Chipped Stone Assemblage of the Layer B of the Kamyana Mohyla 1 Site (South-Eastern Ukraine) and the Issue of Kukrek in the North Meotic Steppe Region

The layer B is one of the lower layers of the long stratigraphic sequence of the Kamyana Mohyla 1 site. The layer B received eight new AMS radiocarbon dates that clarified its chronology: 7950–7300 calibrated years BC. They are in a reasonable correspondence with the dates for lower and upper layers. The lithic assemblage belongs to Kukrek cultural aspect. It is characterized by pencil-like conical cores, Kukrek inserts, Kukrek burins and Dęby burins, nongeometric microliths (oblique points). The assemblage finds close parallels in the sites of Kukrek, Ihren VIII, Melnychna Krucha SU4 and Domchi-Kaia. They can be united into Kukrek sensu stricto cultural unit. The overlying layer C yielded somewhat different complex that finds parallels in the materials of the so-called “Kukrek cultural tradition.” Due to clear stratigraphic position of these units in the Kamyana Mohyla 1 sequence, we are able to differentiate Kukrek sensu stricto and “Kukrek cultural tradition” and suggest their respective chronological positions

A multi-pronged approach targeting SARS-CoV-2 proteins using ultra-large virtual screening.

The unparalleled global effort to combat the continuing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic over the last year has resulted in promising prophylactic measures. However, a need still exists for cheap, effective therapeutics, and targeting multiple points in the viral life cycle could help tackle the current, as well as future, coronaviruses. Here, we leverage our recently developed, ultra-large-scale in silico screening platform, VirtualFlow, to search for inhibitors that target SARS-CoV-2. In this unprecedented structure-based virtual campaign, we screened roughly 1 billion molecules against each of 40 different target sites on 17 different potential viral and host targets. In addition to targeting the active sites of viral enzymes, we also targeted critical auxiliary sites such as functionally important protein-protein interactions

Current issues of security management during martial law

The authors of the book have come to the conclusion that toensuring the country’s security in the conditions of military aggression, it is necessary to use the mechanisms of protection of territories and population, support of economic entities, international legal levers of influence on the aggressor country. Basic research focuses on assessment the resource potential of enterprises during martial law, the analysis of migration flows in the middle of the country and abroad, the volume of food exports, marketing and logistics system. The research results have been implemented in the different decision-making models during martial law, information and economic security management, formation of personnel potential and assets of enterprises, food, energy and environmental security management, use of budgetary levers and financial instruments. The results of the study can be used in the developing of directions, programs and strategies for the post-war recovery of Ukraine’s economy and the attraction of foreign investments in the regions, decision-making at the level of ministries and agencies that regulate security management processes. The results can also be used by students and young scientists in the educational process and conducting scientific research on the problems of ensuring the country’s security

Cooling Cyclic Air of Marine Engine with Water-Fuel Emulsion Combustion by Exhaust Heat Recovery Chiller

The fuel efficiency of marine diesel engine as any combustion engine falls with raising the temperature of air at the suction of its turbocharger. Therefore, cooling the engine turbocharger intake air by recovering exhaust gas heat to refrigeration capacity is a very perspective trend in enhancing the fuel efficiency of marine diesel engines. The application of water-fuel emulsion (WFE) combustion enables the reduction of a low-temperature corrosion, and, as a result, provides deeper exhaust gas heat utilization in the exhaust gas boiler (EGB) to the much lower temperature of 90–110 °C during WFE instead of 150–170 °C when combusting conventional fuel oil. This leads to the increment of the heat extracted from exhaust gas that is converted to refrigeration capacity by exhaust heat recovery chiller for cooling engine turbocharger sucked air accordingly. We experimentally investigated the corrosion processes on the condensation surfaces of EGB during WFE combustion to approve their intensity suppression and the possibility of deeper exhaust gas heat utilization. The fuel efficiency of cooling intake air at the suction of engine turbocharger with WFE combustion by exhaust heat recovery chiller was estimated along the voyage line Mariupol–Amsterdam–Mariupol. The values of available refrigeration capacity of exhaust heat recovery chiller, engine turbocharger sacked air temperature drop, and corresponding reduction in specific fuel consumption of the main low-speed diesel engine at varying actual climatic conditions on the voyage line were evaluated

Efficiency Analysis of the Aerothermopressor Application for Intercooling between Compressor Stages by using CFD Model

Kobalava, H. Efficiency analysis of the aerothermopressor application for intercooling between compressor stages by using CFD model / H. Kobalava, M. Radchenko, D. Konovalov // Journal of New Technologies in Environmental Science. – 2021. – No. 4, vol. 5. – P. 129–134.A study of the aerothermopressor operation for air intercooling between the stages of a multistage compressor as part of a modern gas turbine (LMS100 brand from General Electric) was carried out in the article. A calculation method has been developed using numerical modeling for the evaporation of fine water droplets in the air flow. The main characteristics of the two-phase flow at the aerothermopressor outlet have been determined. It has been found that jet apparatus provides efficient atomization of the liquid, and hence, more efficient isothermal compression process in a high-pressure compressor. The aerothermopressor applying allowed to reduce the temperature of the compressed air between the compressor stages to 50-70°C. Such a decrease in temperature under the thermo-gas-dynamic compression conditions allowed to increase the pressure at the aerothermopressor outlet up to 12-28 kPa (4-9%)

Determination of hydraulic resistance of the aerothermopressor for gas turbine cyclic air cooling

One of the promising trends to increase the fuel and energy efficiency of gas turbines is contact cooling of cyclic air by using a twophase jet apparatus – an aerothermopressor. The rational parameters of work processes of the aerothermopressor were studied. The experimental setup was designed to simulate the aerothermopressor operation in the cooling air cycle of the gas turbine and to determine pressure losses in the aerothermopressor flow part. Based on the obtained experimental data, an empirical equation was proposed to determine the hydraulic resistance coefficient of the aerothermopressor flow part, depending on the initial pressure and the amount of water injected. The deviation of the calculated hydraulic resistance coefficient from the experimental ones is ± 25 %. The obtained results can be used in the practice of designing the aerothermopressor for gas turbine cyclic air cooling

Absorption of pollutants from exhaust gases by low-temperature heating surfaces

One of the most effective methods aimed to improving the environmental safety is fuel oil combustion in the form of specially prepared water-fuel emulsions. The combustion of water-fuel emulsion in internal combustion engines makes it possible to reduce a rate of low-temperature corrosion at wall temperatures below the dew point temperature of sulfuric acid vapor, to install a condensing lowtemperature heating surface in the exhaust gas boiler that leads to increase the efficiency of boiler. Therefore, it is of great importance to assess the effect of the presence of condensate (water, acid) and pollution on these surfaces on the processes of NOx, SO2 absorption from exhaust gases. Investigations of SO2, NOx and particulate matter emission were carried out on the experimental installation for fuel oil and water-fuel emulsion combustion with different water content. Using condensing heating surface enables to reduce the concentration of NOx and SO2 by 65 %. Experimental studies have shown that condensing heating surface ensures the capture of up to 30 % of particulate matter from the exhaust gas flow