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In this study, nanofibric cobaltites were synthesized using the electrospinning technique. The research focuses on how Ni and Fe cation substitutions affect the magnetic and dielectric properties of ACo2O4. X-ray diffraction analysis confirmed that all synthesized samples possess a cubic spinel structure. FESEM revealed that the cobaltite samples have a nanofibric morphology composed of interconnected nanoparticles. The dielectric properties of these spinel cobaltites were examined in low magnetic fields ranging from 0 to 10 mT. Using the Maxwell–Wagner model, the study demonstrates that the transport properties of spinel cobaltites can be modulated by an external magnetic field. Dielectric plots of various magnetic spinel cobaltites showed reduced resistance in the presence of a magnetic field, underscoring the significant impact of magnetic fields on the transport properties of these materials. The research also highlights the crucial role of interconnected grains and grain boundary effects on the transport mechanisms. This study provides valuable insights into the tunable transport properties of spinel cobaltites, potentially leading to advancements in their application in magnetic and dielectric devices. [ABSTRACT FROM AUTHOR]

Context: The healthcare sciences college students have a lifestyle with low physical activity and disordered eating habits, which exposes them to a higher risk of obesity. Health science college students were the target group of particular interest in this study as they are future physicians. If they are overweight or obese, they will carry the wrong impression to the general population. Aim: To assess the prevalence of overweight and obesity among healthcare science college students at private university in Saudi Arabia. Also, it assesses the relationship between the sociodemographic characteristics and risk of overweight and obesity in this population. Methods: A cross-sectional study was conducted among healthcare science college students. A validated, structured, closed-ended questionnaire was self-administered through the Monkey survey. All data were analyzed using SPSS. Results: 401 students participated, in which 33.4% were male and 66.6% were female students; and the mean age was 22 years. The study showed that 23.7% of participants were overweight, and 11% were obese. The prevalence of obesity was higher among males. Family history of obesity and fatigue were risk factors for obesity. Conclusion: The healthcare Science College students showed a high prevalence of obesity and overweight. This is strengthening the need to encourage a healthy lifestyle, healthy food habits, and physical activities to avoid obesity-related complications. [ABSTRACT FROM AUTHOR]