Special Issue: Machine Modelling and Simulations

	Preface by Marcin Kubiak, Editor of the Special Issue	page 3
1	Fruit classification by assessing slice hardness based on RGB imaging. Case study: apple slices Bashar S. Falih, Łukasz Gierz, Mustafa A.J. Al-Sammarraie	pages 7-18
2	Modeling of co-combustion of butanol with diesel fuel in a dual-fuel compression ignition engine Arkadiusz Jamrozik, Wojciech Tutak	pages 19-30
3	Progressive design of the take-up bar within the jet weaving machine for the production of 3D fabrics Tomáš Koňařík, Karel Ráž	pages 31-42
4	Method for determining the center of gravity height in wheelchairs Michał Kończak, Mateusz Kukla	pages 43-53
5	A note on the mathematical model of machine vibration Rudolf Olach, Radoslav Chupáč, Božena Dorociaková	pages 54-62
6	Parameter estimation of Weibull probability distribution by seven methods – a wind regime of the city of Nitra, Slovakia Ivana Pobočíková, Zuzana Sedliačková, Mária Michalková, Daniela Jurášová	pages 63-73
7	Dynamic analysis of the wheel suspension arm Milan Sapieta, Alžbeta Sapietová, Martin Svoboda	pages 74-85
8	Kinematic synthesis of the Gough-Stewart platform in ADAMS and MATLAB Alžbeta Sapietová, Vladimír Dekýš, Dušan Mikolaj, Milan Sapieta	pages 86-96
9	Application of mathematical models for the analysis of thermal phenomena in the welding process using Abaqus software Zbigniew Saternus, Marcin Kubiak, Tomasz Domański	pages 97-108
10	Advancing the dynamic properties of a column with variable flexural stiffness in terms of structural mounting damping, external and internal damping Janusz Szmidla, Anna Jurczyńska	pages 109-117
11	The load on the supporting structure of the gantry crane when moving along the crane track Ján Vavro, Ján Vavro jr., Ľuboš Marček, Jana Kuricová	pages 118-129
12	Finite element analysis of the single shear piercing punch performance for belt perforation Dominik Wojtkowiak, Krzysztof Talaśka	pages 130-138