Browsing by Author "Števárová, Lucia"

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    AIRLINE HUBBING CONCEPTS
    (Žilinská univerzita v Žiline, 2020) Števárová, Lucia; Badánik, Benedikt
    New forms of cooperation between airlines have been in place since nineties. Airline alliances have been formed among network carriers. Before, cooperation of airlines was based on bilateral agreements on code-sharing of their flights. For instance, in 1989 KLM and Northwest agreed on large-scale code sharing. Nowadays, three major alliances might be recognized - Star Alliance, SkyTeam and oneworld. Together, they count for two thirds of total number of available seat kilometres. Airlines in alliances benefit from extended network and economies of scope and are prone to gain competitive advantage over the market by being able to offer more O&Ds and multiple routings via their hubs. Furthermore, they might save cost by sharing their capacity, facilities (gates, premium lounges) and equipment with partner airlines. Airline networks are defined by served markets, number of destinations, their configuration and airline business models. There are two concepts of network structures recognised nowadays: Hub and spoke and Point-to-point. This paper offers insights to the Hub and spoke concept. First of all, it examines hubbing concepts in general, it describes detailed aspects that influence passenger connectivity and on top of that it offers different hub airports wave patterns and airline hubbing concepts.
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    Optimisation of turboprop aircraft operations as a means to reduce their environmental footprint
    (University of Zilina, 2021) Števárová, Lucia; Badánik, Benedikt
    This paper deals with the subject of optimisation of turboprop aircraft operations to decrease their environmental footprint. This aircraft category is not at the forefront of optimisation efforts of operators as it supplies lower volumes of traffic and is equipped with the most fuel-efficient technology for missions served on regional markets. The theoretical part of this paper details turboprop aircraft contributions to global CO2 emissions and analyses aspects behind their efficient performance. Further, it provides a thorough assessment of the operational practices that can significantly reduce the environmental footprint of turboprop aircraft operations. For better illustration, some are exemplified in simple case studies. The practical part of this work aimed to quantify the effects of operational optimisation on turboprop aircraft. Based on the theoretical analysis, we established five operational adjustments whose effects can be determined using performance calculations. These calculations have been carried out using ATR 72-600 aircraft as a reference for a specified average turboprop flight. It was found that through operational adjustments, the fuel consumption on an average ATR 72-600 flight can be decreased on the order of 10%. The energy intensity of operations defined in CO2 per revenue passenger kilometre could be nearly halved compared to actual values of the ATR 72-600 fleet.