Abstract The widespread Uralic family offers several advantages for tracing prehistory: a firm absolute chronological anchor point in an ancient contact episode with well-dated Indo-Iranian; other points of intersection or diagnostic non-intersection early Indo-European (the Late Proto-Indo-European-speaking Yamnaya culture the western steppe, Afanasievo upper Yenisei, and Fatyanovo middle Volg...

Groundwater pollution poses a severe threat and issue to the environment humanity overall. That is why mitigative strategies are urgently needed. Today, studies mapping groundwater risk assessment being developed. In this study, five new hybrid/ensemble machine learning (ML) models developed, named DRASTIC-Random Forest (RF), DRASTIC-Support Vector Machine (SVM), DRASTIC-Multilayer Perceptron (...

drastic model has been used to map groundwater vulnerability to pollution in many areas. since this method is used in different places without any changes, it cannot consider the effects of pollution type and characteristics. therefore, the method needs to be calibrated and corrected for a specific aquifer and pollution. in the present research, the rates of drastic parameters have been correct...

introduction one of the most vulnerable water resources against contamination is ground water table. these resources are exposed to contamination in various forms. identifying and controlling contamination in these resources are more difficult and costly than surface waters. also because of the persistence of contamination in these resources, the best way to prevent their contamination is to id...