Search Results

You are looking at 1 - 10 of 1,059 items for :

  • methodology x
  • Introductions and Overviews x
Clear All
Open access

Artūras Petraška, Kristina Čižiūnienė, Olegas Prentkovskis and Aldona Jarašūnienė

. Transportation Research Procedia , 14, 467–473. doi:10.1016/j.trpro.2016.05.099 39. Wang, K.C.P., Li, Q., Hall, K.D., Nguyen, V., Xiao, D.X. (2011) Development of truck loading groups for the mechanistic-empirical pavement design guide. Journal of Transportation Engineering , 137(12). doi:10.1061/(ASCE)TE.1943-5436.0000277 40. Xu, C., Hoel, L.A. (2001) A Methodology for Oversized Vehicle Trip Scheduling . Research Report No. UVACTS-14-13-23. Center for Transportation Studies, University of Virginia, USA, 85 p.

Open access

Michał Rogalewicz and Robert Sika

Practitioners , Wiley, 2014. [37] KDnuggets, CRISP-DM, still the top methodology for analytics, data mining, or data science projects , 2014, Retrieved 25.10.2016, http://www.kdnuggets.com/2014/10/crisp-dm-top-methodology-analytics-data-mining-data-science-projects.html . [38] Piatetsky-Shapiro G., Frawley W., Knowledge Discovery in Databases , MIT Press Cambridge, 1991. [39] Frawley W., Piatetsky-Shapiro G., Matheus C.J., Knowledge Discovery in Databases: An Overview , Art. Int. Mag., 13, 3, 57–70, 1992. [40] Piatetsky-Shapiro G., Matheus C

Open access

D. Tanikić, V. Marinković, M. Manić, G. Devedžić and S. Ranđelović

of orthodontic wires in Artificial Saliva Solutions by Using response surface methodology”, Materials Research 16 (1), 50-64 (2013). [20] F.P. Cota, T.H. Panzera, M.A. Schiavon, A.L. Christoforo, P.H.R. Borges, C. Bowen and F. Scarpa, “Full factorial design analysis of carbon nanotube polymer-cement composites”, Materials Research 15 (4), 573-580 (2012). [21] G.C. Onwubolu and S. Kumar, “Response surface methodology- based approach to CNC drilling operations”, J. Mater. Process. Technol. 171 (1), 41-47 (2006). [22] T

Open access

Marek Stanisław Weglowski

.M.: Response Surface Methodology. Process and product optimization using design experiments. New York, Wiley, 2009. [13] Arora A., Nandan R., Reynolds A.P., DebRoy T.: Torque, power requirement and stir zone geometry in friction stir welding through modelling and experiments. Scripta Materialia 60 (2009) 13-16.

Open access

Lenka Girmanová, Marek Šolc, Juraj Kliment, Adriana Divoková and Vojtech Mikloš

. - Harmanto , D. - Rocha-Lona, L. 2010. An empirical application of Six Sigma and DMAIC methodology for business process improvement. In International Conference on Flexible Automation and Intelligent Manufacturing 2010. Oakland, California: FAIM, pp. 92-100. ISBN 9781617827143. GIJO, E. V. - RAO, T. S. 2005. Six Sigma implementation - Hurdles and more hurdles. In Total Quality Management and Business Excellence, vol. 16, no. 6, pp. 721-725. GIJO, E. V. - SCARIA, J. 2013. Process improvement through Six Sigma with Beta correction: a case

Open access

Filip Lisowski and Jan Ryś

Abstract

The paper presents the methodology for designing the teeth conjunction of planetary gears in the planetary roller screw mechanism. A function of the planetary gears is to synchronize an operation of rollers in order to avoid axial displacements. A condition of the correct operation is no axial movement of rollers in relation to the nut. The planetary gears are integral parts of rollers and therefore an operation of the gear transmissions has a direct impact on cooperation of the screw, rollers and the nut. The proper design of gear engagements is essential for reducing slippage on surfaces of the cooperating threaded elements. For this purpose, in a designing method, both the limitations of operation and kinematic conditions of rollers’ operation have to be taken into account.

Open access

R. Wrona, P. Zyzak, E. Ziółkowski and M. Brzeziński

Methodology of Testing Shot Blasting Machines in Industrial Conditions

Shot blasting machines are widely used for automated surface treatment and finishing of castings. In shot blasting processes the stream of shots is generated and shaped by blasting turbines, making up a kinetic and dynamic system comprising a separating rotor, an adapting sleeve and a propelling rotor provided with blades. The shot blasting performance- i.e. the quality of shot treated surfaces depends on the actual design and operational parameters of the unit whilst the values of relevant parameters are associated with the geometry of turbine components and the level of its integration with the separator system. The circulation of the blasting medium becomes the integrating factor of the process line, starting from the hopper, through the propeller turbine, casting treatment, separation of contaminated abrasive mixture, to its recycling and reuse.

Inferior quality of the abrasive agent (shot) and insufficient purity of the abrasive mixture are responsible for low effectiveness of shot blasting. However, most practitioners fail to fully recognize the importance of proper diagnostics of the shot blasting process in industrial conditions. The wearing of major machine components and of the blasting agent and quality of shot treated surfaces are often misinterpreted, hence the need to take into account all factors involved in the process within the frame of a comprehensive methodology.

This paper is an attempt to formulate and apply the available testing methods to the engineering practice in industrial conditions.

Open access

T. Kliment, M. Tuchyňa and M. Kliment

Methodology for conformance testing of spatial data infrastructure components including an example of its implementation in Slovakia

Before any spatial data infrastructure (SDI) is implemented as fully operational, many relevant testing procedures should take place. Such procedures should evaluate the compliancy level of particular SDI components against the relevant standards and implementing rules. Hence, they should ensure a high interoperability level. Many testing activities have already been performed within the implementation of the European SDI (INSPIRE - Infrastructure for Spatial Information in the European Community). Nevertheless, a common and versatile testing methodology, which is possible to use at any level of SDI realization is still lacking. This paper proposes a conformance testing methodology for selected SDI components applicable via network services for the discovery, view and downloading of data. An example of such an implementation has taken place within an environmental SDI developed by the Slovak Environmental Agency. A testing report template summarizing the results of the tests is proposed to be considered as a common template on a national level to be used within the implementation of a National Infrastructure for Spatial Information in the Slovak Republic.

Open access

Kazimierz Lebecki

References EN-15233 (2009). Methodology for functional safety assessment of protective systems for potentially explosive atmospheres. IEC-EN 61508 (2008). Functional Safety of Electrical /Electronic/ Programmable Electronic Safety Related Systems. SALVI, Olivier, DEBRAY, Bruno (2006). A global view on ARAMIS, a risk assessment methodology for industries in the framework of the SEVESO II directive. Journal of Hazardous Materials . 2006, Vol. 130, No. 3, pp. 187-199. ISSN 0304-3894.

Open access

Viliam Macura, Zuzana Š Štefunková, Martina Majorošová, Peter Halaj and Andrej Škrinár

Abstract

In this study, the quality of the aquatic habitats of mountain and piedmont streams was evaluated using the ‘Instream Flow Incremental Methodology (IFIM)’ decision-making tool. The quality of habitats was interpreted from the behaviour of bioindicators in the form of habitat suitability curves (HSCs). From 1995 until the present, 59 different reaches of 43 mountain streams in Slovakia and 3 validation reaches were evaluated, and the results analysed. The aim of this study was to generalize the parameters of the HSCs for the brown trout. The generalized curves will be useful for water management planning. It is difficult and time-consuming to take hydrometrical and ichthyological measurements at different water levels. Therefore, we developed a methodology for modifying suitability curves based on an ichthyological survey during a low flow and a flow at which fish lose the ability to resist the flow velocity. The study provides the information how such curves can be modified for a wider flow range. In summary, this study shows that generalized HSCs provide representative data that can be used to support both the design of river restoration and the assessment of the impacts of the water use or of climate change on stream habitat quality.