The activity concentrations of ²³⁸U, ²³²Th and ⁴⁰K in sediments from the Kamukuywa River in Bungoma County were determined using a NaI(Tl) detector at South Eastern University Kenya, Physics Department in order to obtain the radium equivalent, absorbed dose rate, annual effective dose rate, hazard indices, radioelement concentrations (RC) and radiogenic heat production (RHP). The average activity concentrations for ²³⁸U, ²³²Th and ⁴⁰...

Nuclear Physics 

Orthodontic treatment of Class II division 1 malocclusion represents a clinical challenge due to its esthetic and functional implications, as well as the potential risk of relapse. This case report describes the orthodontic management of a 12-year-old patient presenting with a Class II division 1 malocclusion characterized by maxillary incisor protrusion and increased overjet. The treatment plan was based on Class II mechanics combined with the extraction of the maxillary first premolars, aiming...

Dentistry 

This narrative review examines the interrelationships among personality traits, motivation for physical activity, and physical activity (PA) levels among university students. Despite the well-documented physical and psychological benefits of PA, participation rates among university students remain suboptimal. Drawing on the Big Five personality framework and Self-Determination Theory (SDT), the study reviews how stable personality dispositions shape motivational processes and, in turn, influence...

Sociology 

Non locality is a quantum phenomenon without classical counterpart. In this article, the well-known total null spin state of two entangled particles jointly generated, the singlet state, is analysed. It is concluded that special relativity is not violated for space time physical processes because the non local correlation is some kind of bidirectional relationship outside space time.

Quantum Physics 

This systematic review examines the empirical literature on teaching climate change as a socio-scientific issue (SSI) in secondary science education between 2021 and 2026. Following PRISMA guidelines, 43 peer-reviewed articles were analyzed to identify key instructional strategies, student learning outcomes, and implementation challenges. Findings reveal four primary instructional approaches: argumentation and debate, project-based learning, technology-enhanced modeling, and place-based/action-o...

Educational Technology 

Wind is a critical meteorological parameter that influences numerous environmental, oceanic, and human activities. This study presents a comprehensive spatio-temporal characterization of wind regimes in the Algerian Basin based on 84 years (1940-2024) of ERA5 reanalysis data. Statistical and geospatial analyses were conducted to explore monthly, seasonal, and annual variability in wind speed and direction. The study also applied anomaly detection, Mann-Kendall trend testing, and Empirical Orthog...

Environmental Sciences 

Shunting operation is the core link of railway station transportation organization, whose efficiency directly determines the turnover speed of trains, the utilization rate of station facilities and the overall operational efficiency of the railway network. With the rapid growth of rail freight and passenger transport volume, the traditional shunting operation mode, which relies on manual experience and backward equipment, has been difficult to adapt to the demand of modern railway intelligent de...

Transportation Engineering 

Against the backdrop of frequent global supply chain disruptions, intensifying geopolitical games, and the global call for carbon neutrality, the China-Europe Railway Express (CER Express) has evolved from a “channel construction” stage to a critical period of quality improvement and efficiency optimization. As the core logistics carrier of the Belt and Road Initiative (BRI), it has become a key link in stabilizing Eurasian trade and enhancing supply chain resilience. Based on the analysis frame...

Transportation Engineering 

Background: Managing teeth with open apices, particularly after trauma, failed root canal treatment and the presence of apical periodontitis, poses significant clinical challenges. Apexification using Mineral Trioxide Aggregate (MTA) has emerged as a predictable technique. Case summary: A 23-year-old patient presented with persistent fistula between the central and the lateral incisor, previously treated and associated with a resorbed open apex and apical radiolucency. Non-surgical retreatment w...

Dentistry 

In this work, we prove that the quintic energy critical wave inside a cylindrical convex domain$\Omega \subset {ℝ}^3$with smooth boundary$\partial \Omega \ne \varnothing$is well-posed in energy space. The dispersive estimates found in [1] and the St...

Partial Differential Equation