Research and Reviews in Science and Mathematics - September 2021 Kitap Açıklaması The topics in the book as follows;• Brown Dwarfs• Investigation Of Chironomidae (diptera) Fauna In Oğulpaşa Stream (edİrne/turkey)• Determining The Role Of Renewable Energy And Economic Growth In The Human Development Process Using Different Link Functions In Fractional Regression Model• Comparing Extreme Learning Machine And Multilayer Perception: Tourism Data As An Example• Vitamin D And Its Importance In Metabolism• Bioactive Components And Biological Activities Of The Cardamom (e. Cardamomum L.) Plant• The Stability Analysis Of Autonomous Incommensurate Fractional-Order System And Its Some Conclusions• Anomalous Photo-Sensitivity Of Al/Ch3nh3pbi3-Xclx/Si/Al Vertical Junction Diodes; Photodiode- And Solar Cell-Like (Tanıtım Bülteninden)