THE STRUCTURE OF PATIENTS REFERRED TO THE DIFFERENTIAL DIAGNOSTIC DEPARTMENT OF TB DISPENSARY

Goal of the study: to investigate the structure of patients referred with the suspicion of tuberculosis to the differential diagnostics department of TB dispensary.Materials and methods. The analysis included investigation of medical documents of 990 patients admitted to the hospital in 2012-2014 with the suspicion of tuberculosis to the diagnostic department of TB dispensary.Results. No active tuberculosis had been confirmed in 506 (51.1%) patients out of 990. Out of those patients 29.4% of cases had pneumonia or other inflammatory disease, in 18.9% – post-tuberculous changes, 12.7% – lung cancer, 6.5% – respiratory tuberculosis. The time of diagnosis for each nosology without invasive methods of sample obtaining was analyzed

The influence of the microstructure morphology of two phase Ti-6Al-4V alloy on the mechanical properties of diffusion bonded joints

The influence of ultra fine grained (UFG) and coarse grained (CG) microstructure of the titanium alloy Ti-6Al-4V on the strength of a diffusion bonded (DB) joint was studied using a laboratory DB fixture and a new shear test rig. The DB process was carried out at 725°C and 825°C during 2 and 4 hours in a vacuum furnace. Coarsening of grain structure resulting from different DB cycles was quantified. The chain pores were observed at 725°C for both microstructure conditions bonded during 2 hours. The increase of bonding time up to 4 hours leads to subsequent elimination of the pores. The UFG samples bonded at 725°C showed a higher level of the shear strength than CG samples for both bonding times. The CG material demonstrated the highest shear strength after 4 hours of DB bonding at 825°C. The increase of the creep deformation of UFG samples when compared to the CG condition was observed as a result of DB at of 725° C during 4 hours

Decomposition process in a FeAuPd alloy nanostructured by severe plastic deformation

The decomposition process mechanisms have been investigated in a Fe50Au25Pd25 (at.%) alloy processed by severe plastic deformation. Phases were characterized by X-ray diffraction and microstructures were observed using transmission electron microscopy. In the coarse grain alloy homogenized and aged at $450 ^{circ}\mathrm{C}$, the bcc \alpha-Fe and fcc AuPd phases nucleate in the fcc supersaturated solid solution and grow by a discontinuous precipitation process resulting in a typical lamellar structure. The grain size of the homogenized FeAuPd alloy was reduced in a range of 50 to 100nm by high pressure torsion. Aging at $450 ^{circ}\mathrm{C}$ this nanostructure leads to the decomposition of the solid solution into an equi-axed microstructure. The grain growth is very limited during aging and the grain size remains under 100nm. The combination of two phases with different crystallographic structures (bcc \alpha-Fe and fcc AuPd) and of the nanoscaled grain size gives rise to a significant hardening of the allo

Determination of regression materials mircohardness, processed by low-temperature plasma dependence on process conditions

© Published under licence by IOP Publishing Ltd.The influence of conditions of plasma surface treatment on hardening of carbon steel technological process was analyzed. Hardening was carried out in plasma electrothermal line with an electrolytic cathode. When processing, steel crystal grains are crushed and the structure is changed from ferrite-pearlite to bainite-troostite and martensite, depending on the processing conditions. In this case the surface microhardness increase in 2 - 3 times. The dependence of the carbon steel surface microhardness on the discharge current (2 - 10 A), the distance between the heat source and the surface, the plasma gas flow rate and treatment duration was found. On the basis of multifactor experiment planning methods and the method of least squares, the formula that describes this relationship was found. This allowed to conduct a targeted search of optimal conditions of processes of hardening steel and improve the efficiency and quality of research

Thermodynamics of activation of a viscous current and structural dynamic analysis high-viscosity oil at ultrasonic influence

Complex calculations are carried out in a wide interval of temperatures at various ultrasonic duration of power characteristics in the viscous-current process of the difficult structural units (VCDS) at high-viscosity oil (HVO). Power characteristics are calculated of the viscous current activation. Researches are carried out of the high-viscosity oil samples by a pulse nuclear magnetic resonance. The work calculation results in the viscous current process are presented on the basis of the carried-out pilot studies of HVO power characteristics

Automated design systems for manufacturing processes

© 2015, Allerton Press, Inc. A method of formalizing complex manufacturing processes on the basis of multilevel decomposition is proposed. In this approach, standard elements are identified at each level. Principles for formulating individual matrices and flexibly adjustable algorithmic matrices are outlined

Archaeological survey of wooden remains from 16th-19th century Sviyazhsk

This article is devoted to the results of an archaeological survey carried out in 2008 on the site of the former faubourg (suburb) of Sviyazhsk town. The survey obtained and analysed useful information about the nature and contents of the cultural layer being revealed by the eroding banks of the Kuibyshev reservoir. The survey represented the first archaeological research carried out in the Sviyazhsk faubourg, and yielded much information on its layout. The remains of approximately 40 wooden constructions (buildings, fences, pavements, etc.) from the second half of the 16th-beginning of the 20th century were uncovered during the excavation. The residential character of the excavated buildings was determined by the presence of furnace remains found on the excavation site. The unified orientation of the household buildings from various layers of the excavation site, dating from the mid-16th up to the 20th century, indicates the street plan of the faubourg, which was more or less maintained throughout its existence. More than half the studied constructions were damaged by fire which accordingly gave rise to the development of the Sviyazhsk faubourg. The finds - 5,374 items in total - included 2,863 ceramic fragments (of which 334 were of traditional Bulgar style); 2,391 leather items (shoes, mittens, quivers, etc.); textiles (wool, homespun linen, felt, willow fibre) and iron goods (knives, scissors, nails, etc.). The numerous finds that emerged from the excavation site reflect the life, craft, farming and trading activities of the population of this medieval town and concurred with other known sources illustrating the life of Sviyazhsk residents as the town waxed and waned in its political importance as a trading post and economic centre of the region

Phase and structural conditions of low-temperature plasma interaction products with steel

© Published under licence by IOP Publishing Ltd. Structural-phase research of low-temperature plasma interaction products with carbonaceous steel is conducted in the discharge between solid electrode and water. Such a discharge at a certain electric parameters leads to a powder formation of spherical particles with a diameter 10-6 - 10-3 m. A scale on surfaces of a steel electrode and the powder synthesized from it are subjected to a comparative analysis. Qualitative and quantitative phase characteristics of these products are different and depend on conditions of their formation. Their basic phase components are various ferric oxides: magnetite Fe3O4, wustite FeO, hematite α-Fe2O3. Magnetite is contained in the powder synthesized at normal atmospheric conditions in the greatest quantity. Atmospheric pressure reduction and discharge implementation in a nitrogenous aerosphere considerably reduce quantity of magnetite in a formed powder. Diffusion speed in oxide layers and reaction temperature also influence electrode iron oxidation process. The formation mechanism of ferritic powder from steel under the influence of discharge plasma with a liquid electrode is offered on the basis of the gained results

Plasma spray coating with ferromagnetic powder by thermo-electric plasma equipment

© Published under licence by IOP Publishing Ltd. Plasma spray coating is the most preferred and readily available method of carrying out repair and restoration works in comparison to other methods at present. Though the method of plasma spraying has been known for a long time, there are still a number of unsolved issues related to the choice of optimal deposition regimes. The thermo-electric plasma system for plasma spray coating with a liquid electrode is discussed in this article. The process and optimal parameters of plasma spray coating regimes are described