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Airports are known to cause noise-related environmental concerns, mostly because significant environmental impact correlated with operation of airports arises from aircraft generated noise. In order to address this concern, many airports have applied a variety of actions that alleviate negative effects of noise i.e. noise abatement measures (NAMs). Although there are similarities between airports applying some of the NAMs, numbers and types of applied measures are quite different among them. This paper focuses on finding statistical evidence to support the hypothesis that there is a significant correlation between applied NAMs and specific characteristics related to airports. To determine the reasons why airports apply NAMs, a logistic regression method was used on the data set for 246 European airports. As predictor variables, five specific characteristics related to airports (number of runways, number of aircraft movements, distance from the city, population of the city it serves, per capita gross domestic product (GDP) of the country an airport is located in), and ten NAMs based on their mutual dependencies were used. The results demonstrate a significant correlation between the applied NAMs and particular airport-related characteristics, but also between NAMs themselves. These findings can be used to determine the likelihood of applying a particular NAM to any airport, based on the characteristics that show a significant correlation with the corresponding NAM.

The development of Information and Communication Technologies (ICT) is an important issue that affects countries' socioeconomic prosperity, and the majority of studies indicate that the productivity effect of ICT is quite significant. Thus, measuring the countries information development can gain numerous benefits since comparisons and rankings create a major challenge for countries' further advancement and development. The aim of this paper is multiple. It firstly elaborates the term of the information society and examines countries' ICT development. Secondly, it debates on the importance of measurement and ranking, emphasizing the methods of measuring the information society. It reviews the ICT Development Index (IDI) as one of these methods, pointing to its drawbacks. The disadvantages of the IDI are mostly related to its bias and uncertainty. This paper accentuates the importance of the stability and objectiveness of a measurement method, and for this reason it presents the Composite I-distance Indicator (CIDI) methodology for measuring countries' ICT development that overcomes these drawbacks. In the case study, we analysed a dataset of 157 countries. The results presented in this study clearly indicate that the CIDI ranking methodology is unbiased and more stable than the official IDI ranking methodology, and can be used as an appropriate framework for information society evaluation measurement. This paper makes a review of the ICT Development Index-IDI, pointing to its drawbacks.The disadvantages of the IDI are mostly related to its bias and uncertainty.Paper presents the Composite I-distance Indicator-CIDI for measuring ICT development.CIDI is unbiased and more stable than the official IDI ranking methodology.CIDI can be used as an appropriate framework for information society evaluation.