.  M. Ragavendran, N. Chandrasekhar, R. Ravikumar, R. Saxena, M. Vasudevan, A. K. Bhaduri. Optimization of hybrid laser - TIG welding of 316LN steel using response surface methodology (RSM). Optics and Lasers in Engineering 2017 (94), 27 - 36.  P. Élesztős, R. Jančo, V. Voštiar. Optimization of welding process using a genetic algorithm. Journal of Mechanical Engineering - Strojnícky časopis 2018 (68), No 2, 17 - 24.  D. Santha Rao, N. Ramanaiah. Process parameters optimization for producing AA6061/TiB2 composites by friction
Subhas Chandra Moi, Pradip Kumar Pal, Asish Bandyopadhyay and Ramesh Rudrapati
Mallipudi Srinivasa Rao and Nallu Ramanaiah
, G. Panoutsos, S. Cater. A real time quality monitoring framework for steel friction stir welding using computational intelligence. Journal of Manufacturing Processes 2015 (20), Part 1, 137 - 148.  R. Myers. Response Surface Methodology, Edwards Brothers, Ann Arbor, MI, 1976.  S. Ikeshita, A. Strodahs, Z. Saghi, K. Yamada, P. Burdet, S. Hata, K. - I. Ikeda, P.A. Midgley, K. Kaneko. Hardness and microstructural variation of Al-Mg-Mn-Sc-Zr alloy. Micron 2016 (82), 1 - 8.  D. Yu-lu, Q. Jian, X. Dan, C. Xue
Zbyněk Paška, František Fojtík and Petr Ferfecki
The aim of this work is to find out the components of stress tensor in plane specimens. For this purpose the photoelasticity methodology is used. In order to make this technique more comfortable for use, there was developed an algorithm in MATLAB program. The results are compared with numerical solution. The main advantages of the developed algorithm are the speed and the capabilities to extend to analyze the plastic deformation and strain conditions in the material during forming processes.
Ivan Virgala, Tomáš Lipták and Ľubica Miková
In the paper the locomotion of snake robot is introduced considering locomotion in straight and curved pipe. For the straight pipe locomotion was designed traveling wave locomotion pattern with sine-like wave which expands from rear of the robot to its front. For the locomotion in curved pipe was designed approach which is based on inverse kinematic model including besides primary task also secondary tasks, namely kinematic singularities avoidance task, obstacle avoidance task and joint limit avoidance task. For final inverse kinematic model was used approach of weight matrices by which can be stated the priorities of particular tasks. Both case studies were tested by experimental snake robot in order to verify introduced methodology for locomotion in the straight and curved pipe.
Prasad Raturi Himanshu, Prasad Lalta, Pokhriyal Mayank and Tirth Vineet
process. J Braz Soc Mech Sci Eng 2014 (36), 335 - 346.  K. Hemalatha, V.S.K. Venkatachalapathy, N. Alagumurthy. Surface Integrity analysis in Wire-Cut Electric Discharge Machining of Al 6063/Al 2 O 3 Metal Matrix Composite through Response Surface Methodology. Applied Mechanics and Materials 2014 (592-594), 534 - 539.  D. Satishkumar, M. Kanthababu, V. Vajjiravelu, R. Anburaj, N.T. Sundarrajan, H. Arul. Investigation of wire electrical discharge machining characteristics of Al6063/SiCp composites. Int J Adv Manuf Technol 2011 (56), 975
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.
: Transport, 1989. (in Russian)  A. P. Prokofjev, “Funkcionalnaja effektivnost ekipaza”, in Letnaja dejatelnost ekipazej vozdusnih sudov , Leningrad, OLAGA, 1986, pp. 3–11.  A. Urbahs, M. Urbaha, and A. Cerkovnjuk, “Methodology of logistic organization and planning of Local Transport systems of intermodal transportation”, Proceedings of International Conference Transport Means, Kaunas University of Technology, Lithuania. 2005, pp. 239–241.  International Civil Aviation Organization, Accident Prevention Manual . ICAO DOC 9422-AN/923. Montreal
Silva Andersone and Vladimirs Šestakovs
A technique is proposed to enhance the professionally important qualities of air traffic controllers at the stage of training on the basis of training group formation. The methodology is based on cluster analysis. The proposed criteria are based on the measure of the similarity of student qualities.
Ruta Bogdane, Andris Vaivads and Dejan Dencic
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.
Aleksandrs Urbahs, Kristīne Carjova, Aleksejs Nasibullins and Dmitry Nedelko
The paper contains results of experimental research carried out helicopter bench. In order to create an attenuation chart for AE signal amplitude in helicopter fuselage, a number of experiments were performed on the frame and stringers, inside the fuselage. Later helicopter test bench was used to develop defect localization methodology of helicopter structure fatigue damage technical diagnostics. Analysing helicopter structural defects for different helicopters types it is concluded that the joint elements of helicopter tail boom are still exposed to fatigue crack formation. AE method shows highly effective results predicting fracture of helicopter joint elements.