In order to increase the robustness of a railway system, the detailed analysis for a combination of tracks, signalling systems, timetables and operation of trains is indispensable. We introduce an approach to foresee and analyse punctuality for railway lines where trains are densely operated. Our approach consists of three phases, namely, the analysis of the current situation of train operation...

Re-denomination was not only a zero dropping and new coin minting operation but also a significant milestone in Turkey. Before the currency reform, multiple zeros had posed several difficulties in expressing monetary values, transactions, bookkeeping and statistical records, data processing software, payment systems, price labels etc. So, removing six zeros from national currency became a ...

In the requirements elicitation phase, operation flows of software are often defined by scenarios. It is necessary to define appropriate operation flows as scenarios in terms of easily comprehended operation flows, efficiency, etc. Then scenarios are implemented as software Graphical User Interfaces (GUIs). If the operation flows are defined inappropriately, the implemented GUIs may require mod...

Abstract This paper proposes a matrix operation method for modeling the three-phase transformer by phase-coordinates. Based on decoupling theory, 12 × dimension primitive admittance is obtained at first employing coupling configuration of windings. Under condition asymmetric magnetic circuits, according to boundary conditions connections, transformers in different connections enable be from mat...

Multiphase machines have been recognized in the last few years like an attractive alterna‐ tive to conventional three-phase ones. This is due to their usefulness in a niche of applica‐ tions where the reduction in the total power per phase and, mainly, the high overall system reliability and the ability of using the multiphase machine in faulty conditions are required. Electric vehicle and rail...

This paper presents an efficient meta-heuristic algorithm for optimization of double-layer scallop domes subjected to earthquake loading. The optimization is performed by a combination of harmony search (HS) and firefly algorithm (FA). This new algorithm is called harmony search firefly algorithm (HSFA). The optimization task is achieved by taking into account geometrical and material nonlinear...