BACKGROUND As a low-cost and easily operated treatment, the use of professionally applied topical fluoride was approved for preventing dental caries and remineralising early enamel caries or white spot lesions. It is also used to arrest dentine caries. The aim of this study is to investigate the clinical efficacy of professional fluoride therapy in remineralising and arresting caries in childre...

Recent successful recovery techniques for rockets require that maintain a vertical configuration with zero and lateral velocities; otherwise, landings may fail. To relax this requirement, new active-arresting system (inspired by the arresting gears used on aircraft carriers) is proposed herein to achieve robust landing, even if rocket deviates from target position or has notable residual veloci...

The Thames is an iconic river of cultural and historical importance. A cyclical process deterioration during the last two centuries, followed by technology-driven restorations, including major sanitation projects with a third currently underway, has produced detrimental effects on ecosystem. This paper overviews ecology, pollution other anthropogenic pressures, which lead to biodiversity loss p...