This article discusses the types and classification of unmanned aerial vehicles (UAVs). It analyzes them based on their usage purpose, technical characteristics, and control systems, categorizing them accordingly. The article highlights the development of unmanned technologies and their significance in various fields.

This article is devoted to quantum chemical research, the influence of the number of methylene groups on the reactivity of propylenediamine. An analysis of the data on the electronic structure and energy characteristics makes it possible to determine the role of methylene groups in the reactivity of the reagents and the productivity of the synthesis.

In this scientific article, a comparative analysis of the concepts of ethnicity and nation is carried out. First, the historical, cultural and political aspects of the concepts of ethnicity and nation are deeply studied in the article. the differences and similarities between these are analyzed, the social importance, role in society, and specific characteristics of each are highlighted.

This article provides information on stress and stress management. Information is provided on the general characteristics of intrinsic and extrinsic types of motivation. The article discusses the management of physiological and emotional reactions to any type of stress, and the individual's stress tolerance.

Bul tezisde erkinlik hám erksizlik túsinikleriniń insan minez-qulqına tásiri analiz etiledi. Erktiń buzılıwı processleri hám olardıń shaxs psixologiyasi hám de social qatnaslarǵa kórsetetuǵın tásiri tolıq kórip shıǵıladı. Sonıń menen birge, erksizliktiń hár qıylı kórinisleri hám sebeplerin anıqlaw arqalı onıń aqıbetleri yoritiladi. Usı maqala, tiykarlanıp, jámiyette saw ortalıqtı qáliplestiriw hám erkinlik qádiriyatların targ'ib qılıwda járdem beriwi múmkin.