The aim of the article is to point out the sealing efficiency of the two-language seal of the water pump bearing when radially deflecting the shaft within radial clearance. In order to obtain a radial displacement of the shaft at a location under a two-language seal, dynamic bearing simulation was performed using the MSC Adams program. The largest radial deviation of the shaft was applied in final seal analysis where the contact pressure changes on the individual tongues of the seal were recorded.
Friction Stir Welding (FSW) of an Al-13%Si alloy matrix reinforced with 0, 3 and 6 wt% Al2O3 nanoparticles (nAl2O3) is performed and the optical microstructures, tensile strength, hardness and sliding wear properties of friction stir welded joints are investigated and compared to those of base materials. Four different zones of distinct appearances were observed during FSW, which exhibited altered microstructures in the nugget zone (NZ), thermo mechanically affected zone (TMAZ), heat affected zone (HAZ), and base material zone (BMZ). The ultimate tensile strength of the base materials and their welded joints were found to be increasing with increased wt% of nano-alumina reinforcements. High joint efficiency of 89-97% was achieved in FSW. Hardness and wear resistance of friction stir welded joints were found to be better than those of the base materials.
 Original technical documentation of Prokopa & sons comp.
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18-20, 2010, Tatranské Matliare, High Tatras, Slovak Republic. 9 th International Scientific Conference: Energy-Ecology-Economy (EEE) 2010 , Proceedings on CD, ISBN 978-80-89402-23-6, Paper address: CD/files/Eee/5/4, 22 pages.
 CEVIZ M. A., ÖNER I. V., KAYA F., KARACALI T.: Analysis of the thermal efficiency and cyclic variations in a SI engine under lean combustion conditions, Journal of Thermal Science and Technology , 2011, pp. 121-127, ISSN: 1300-3615
 CHRÍBIK A., POLÓNI M., LACH J., JANČOŠEK Ľ., KUNC P., ZBRANEK J.: Synthesis gas from
Mohamed Benrahmoune, Hafaifa Ahmed, Guemana Mouloud and Chen XiaoQi
 A. Zadeh Shirazi, M. Hatami, M. Yaghoobi, S. J. S. M. Chabok. An intelligent approach to predict vibration rate in a real gas turbine. Intelligent Industrial Systems 2016 (2), No. 3, 253 - 267.
 A. Hafaifa, M. Guemana, A. Daoudi. Vibration supervision in gas turbine based on parity space approach to increasing efficiency. Journal of Vibration and Control 2015 (21), 1622 - 1632.
 S. Madhavan, J. Rajeev, C. Sujatha, A. S. Sekhar. Vibration based damage detection of rotor blades in a gas
Debajyoti R. Chowdhury, Nathuram Chakraborty and Swapan C. Sarkar
required cold in the inside slots of the condenser. The refrigerant gas must have its normal condensation point below that of the gas being liquefied.
The present article highlights the development of a cryogenic condenser in detail and its efficiency testing methodology in-situ by placing it in the Cryogenerator for liquefying nitrogen.
Material and Methods
Materials should be prudently selected for any cryogenic application as there can be extreme changes in the properties of the material being used when exposed to low temperature
Ruta Bogdane, Aleksandrs Bitiņš, Vladimirs Šestakovs and Yasaratne Bandara Dissanayake
In this article, the authors offer a methodology for determining the quality of airline performance by taking into account the level of flight safety on the basis of factor analysis and the results of methodology approbation in the conditions of a functioning airline. The assessment of the level of airline performance quality taking into account the level of flight safety within a certain time span is rather sensitive, informative and reliable. They allow us to detect those changes in industrial and economic conditions and factors that are related to a certain degree of potential deterioration of flight safety. This creates conditions for revealing the tendencies towards the deterioration of flight safety at the stage of their origin, when they have not yet caused deep, irreversible changes in the flight safety of an airline.
Most flight delays in aviation enterprises are related to air traffic management and technical centers. This can happen for various reasons: untimely removal of defects, lack of spare parts, deficiencies in maintenance scheduling, etc. Another reason may be inefficient management in the system of preparing the aircraft for departure. The article suggests a possible option of such an assessment as well as the results obtained from the use of this methodology applied to a specific airline.
The aim of this article is the development of the system and methodology of complex control and evaluation of vehicle operators performance during multifunctional simulation. In order to achieve the above-stated aim it is necessary to solve the following principal tasks: to elaborate a theoretical model of differentiated evaluation of vehicle operator training degree according to different kinds of their functional performance; to develop the method of the differential evaluation of crew performance on full-scale aviation simulators with due consideration of the probabilistic approach on the basis of statistical processing of the data of recorded flight information. The offered theoretical model of the differential evaluation of operator performance and the methodology of standards determination developed on its basis represent a new approach to the creation of automated systems for the objective evaluation of the trainees’ qualification degree. The elaborated system of differential evaluation standards ensures a high degree of objectiveness when evaluating the degree of the vehicle operator qualification and makes it possible to carry out a comparative analysis of the operators’ qualification.