In Chapter One, Ming Ming Chiu deliberates on the way statistical discourse analysis can be used to overcome certain modelling problems by presenting a study on social metacognitive actions. Next, Chapter Two by Oscar João Abdounur explores the correlation between ratio and theoretical music, especially from the 14th through the 16th centuries in Europe. In Chapter Three, Thomas Z Fahidy provides a review of several textbook literature cases which maintain the significance of choosing testing methods. Following this, Chapter Four by A V Kalinin, M I Sumin, and A A Tyukhtina evaluate issues of final observation for the system of Maxwell equations in the quasi-stationary magnetic approximation. Additionally, they present possible algorithm applications. In Chapter Five, R Campoamor-Stursberg applies a systematic method to five-dimensional Lie algebras in order to address the problem of nonlinear systems. Chapter Six by Mohamed Sallak, Ayyoub Imakhlaf, and Yunhui Hu suggest the importance of imprecise theories versus the classical probability theory. Lastly, Chapter Seven by Yilun Shang presents a review on current knowledge of groupies in varied random graph models.