Investigating the impact of initial parameters on autonomous robot swarm movement strategies for enhanced exploration efficiency: a comprehensive study.

Swarm robots are frequently preferred for the exploration of harsh environments and search and rescue operations. This study explores the factors that influence the movement strategies of autonomous robot swarms and their impact on swarm distribution in the field, employing simulation-based analysis. The research consists of two parts: initially, robots undergo free-fall as passive entities, followed by a phase where they employ predefined movement strategies from their fall positions. The study aims to investigate how the initial position and related parameters affect movement characteristics and the ultimate swarm distribution. To achieve this objective, four parameters-radius, height, mass, and the Coefficient of Restitution-were identified, each assigned three different values. The study observes the effects of these parameters on robot motion, considering motion strategies such as Random Walk, Levy Walk, Markov Process, and Brownian Motion. Results indicate that increasing parameter values induce changes in the position values of the free-falling swarm in the first part, which is the initial position for the second part, influencing movement strategies in diverse ways. The outcomes are analyzed concerning the radial and angular spread of the robots. Radial spread measures how far swarm elements spread from their initial positions, while angular spread indicates how homogeneously the robots are distributed according to the polar angle. The study comprehensively investigates how the movement strategies of autonomous robot swarms are impacted by parameters and how these effects manifest in the results. The findings are anticipated to enhance the effective utilization of autonomous robot swarms in exploration missions.

The effects of the COVID-19 pandemic on sedentary life in young adults: a cross-sectional study.

In this study, the effects of the COVID-19 pandemic on physical activity and sedentary lifestyle of young adults were evaluated. The cross-sectional study was conducted on individuals aged 18-35 years between December 2021 and March 2022. In the study, sedentary life was evaluated with the International Physical Activity Questionnaire (IPAQ), screening time and the Brief Eating Behaviors Questionnaire. 397 people participated in the study and the mean age was 24.41 ± 4.18. Body Mass Index (BMI), time spent in front of the screen, need for psychosocial support, and Short Diet Behaviors Questionnaire (SDBQ) scores showed a significant increase during the pandemic compared to the pre-pandemic period (respectively; p < 0.001, p < 0.001, p < 0.001, p < 0.001). It has been observed that there is an increase in the time spent in front of the screen, worsening in eating behaviors, decrease in physical activity, and an increase in BMI values of young adults during pandemic.

Comments on "Sigma-1 receptor ligands improves ventricular repolarization-related ion remodeling in rats with major depression disorder".

With respect to Guo's inspiring article (Guo et al. 2021), we would like to suggest several corrections about some of the figures. We felt obliged to write this erratum letter as these incompatibilities may cause confusion for the readers.