The aim of the paper is to evaluate the development of international migration in relationship to the recent economic situation in member countries of the European Union using quantitative methods including cluster analysis.The number of immigration in Europe has declined since the start of the global recession.The main reason was the decrease of d
Aiming at the problem of tracking skip-glide targets using radar, this paper proposes an Unscented Kalman Filter (UKF) tracking algorithm based on the improved Jerk model.Aiming at the estimation error introduced by the artificial preset acceleration variance and Jerk frequency of the conventional Jerk algorithm, this method calculates the accelera
Differences between the oak lepidopteran communities were studied in Slovakia in 1993 and 1994.Sampling was undertaken between April and October on 3 oak species.Biological traits of larvae were examined in order to explain differences in seasonal guilds among oaks.Cluster analysis shows similarities between communities in the flush feeder guild wh