Prevalence and repercussions of stress and mental health issues on primary and middle school students: a bibliometric analysis.

Objective: This study analyzes the presence and reverberations of stress, anxiety, and other mental health issues on primary and middle school students using bibliometric analysis. The aim of this study is to map the research landscape by statistically analyzing existing literature and identifying key themes, trends, and research hotspots in the domain of stress in students. This study also presents analysis related to top contributing countries, journals, authors, citations, and collaboration networks.

An improved 2-level MPPT scheme for photovoltaic systems using a novel high-frequency learning based adjustable gain-MRAC controller.

Under rapidly changing environmental conditions, the model reference adaptive control (MRAC) based MPPT schemes need high adaptation gain to achieve fast convergence and guaranteed transient performance. The high adaptation gain causes high-frequency oscillations in the control signals resulting in numerical instability and inefficient operation. This paper proposes a novel high-frequency learning-based adjustable gain MRAC (HFLAG-MRAC) for a 2-level MPPT control architecture in photovoltaic (PV) systems to ensure maximum power delivery to the load under rapidly changing environmental conditions.