Observer design for Takagi-Sugeno systems with unmeasurable premise variables using a non-quadratic Lyapunov function.

This work presents a contribution to reduce the conservatism in nonlinear observer for TakagiSugeno fuzzy systems with unmeasurable premise variables based on the mean value theorem. The conservatism was reduced through the use of non-quadratic Lyapunov function (NQLF) rather than the quadratic form used in previous works. The stability conditions are given in the form of Bilinear Matrix Inequalities (BMI) whereby an effective solution to solve this type of problem is presented using linear solvers which are characterized by their computational efficiency.

Psychological Impact of COVID-19 on University Students in Bahrain.

Background COVID-19 is an ongoing event that has affected millions worldwide financially, socially, and psychologically; university students have also felt the devastating impact. Therefore, assessing how students have been affected psychologically is important, which is explored in this study. Methods This cross-sectional study took place in two institutions in Bahrain between October and December 2021.

Particle Swarm Optimization and Two-Way Fixed-Effects Analysis of Variance for Efficient Brain Tumor Segmentation.

Segmentation of brain tumor images, to refine the detection and understanding of abnormal masses in the brain, is an important research topic in medical imaging. This paper proposes a new segmentation method, consisting of three main steps, to detect brain lesions using magnetic resonance imaging (MRI). In the first step, the parts of the image delineating the skull bone are removed, to exclude insignificant data.

Air carrier's liability for the safety of passengers during COVID-19 pandemic.

The paper aims to determine the situations when the air carrier is liable for the transmission of COVID-19 in the course of air transport. It must be emphasized here that the carrier's liability results from bodily injury or death that are caused by an accident on board an aircraft or during the operations of embarking or disembarking. Accordingly, in this paper, we addressed if the transmission of COVID-19 an 'accident' within the Conventions' meaning and the period of air carrier's liability for passengers' contraction of COVID-19, taking into consideration the exoneration of air carrier's liability in COVID-19 cases.