http://yetl.yabesh.ir/yetl1/handle/yetl/4255484 Thu, 27 Aug 2026 16:55:01 GMT 2026-08-27T16:55:01Z https://localhost:443/yetl1/bitstream/id/436471/ http://yetl.yabesh.ir/yetl1/handle/yetl/4255484 http://yetl.yabesh.ir/yetl1/handle/yetl/4316617 Environmental Barrier Coatings for Gas Turbine Ceramic Matrix Composites Presby, Michael J.; Harder, Bryan J.; Lee, Kang N. Wed, 01 Jan 2025 00:00:00 GMT http://yetl.yabesh.ir/yetl1/handle/yetl/4316617 2025-01-01T00:00:00Z http://yetl.yabesh.ir/yetl1/handle/yetl/4316506 Variable Cycle Engine Concepts and Technologies: Bridging Efficiency and Performance Zenkner, S.; Carvalho, F.; Brakmann, R.; Goinis, G. Abstract. Variable Cycle Engines (VCEs), also known as Adaptive Cycle Engines, represent a major advancement in propulsion technology, offering the ability to optimise performance across diverse flight conditions. Unlike conventional turbofans, VCEs employ variable geometry components—such as compressors, turbines, and mixing systems—to dynamically adjust engine parameters, enabling improved fuel efficiency at subsonic speeds and high thrust at supersonic flight. This adaptability also supports enhanced thermal management, reduced installation drag, and operational flexibility critical for next-generation military and supersonic aircraft. The article traces the historical development of VCE concepts from early experimental designs to contemporary three-stream architectures, highlighting ongoing international research efforts such as the U.S. Adaptive Engine Transition Programme (AETP) and Europe’s Next Generation Fighter Engine (NGFE). While challenges remain in reducing system weight and complexity, continued innovation positions VCEs as a transformative technology set to play a pivotal role in the future of aviation. Wed, 01 Jan 2025 00:00:00 GMT http://yetl.yabesh.ir/yetl1/handle/yetl/4316506 2025-01-01T00:00:00Z http://yetl.yabesh.ir/yetl1/handle/yetl/4315162 Fission within Fusion Abrams, Michael Abstract. Despite decades of effort and billions in investment, there is not yet a fusion technology that has achieved sustained commercial net energy output. The conventional approach to fusion involves doughnut-shaped magnetic containers called tokamaks, but some well-funded startups are pursuing radically different methods, fueled by the broader belief that one of these competing paths will eventually succeed. Thu, 01 Jan 2026 00:00:00 GMT http://yetl.yabesh.ir/yetl1/handle/yetl/4315162 2026-01-01T00:00:00Z http://yetl.yabesh.ir/yetl1/handle/yetl/4315161 From Ships to Shores Gibson, Tom Abstract. Ship-to-shore gantry cranes are a cornerstone of global port operations, responsible for moving goods on and off massive container ships. But the fundamental A-frame design has remained the same for more than 70 years. But technological advances in electronics, automation, and sustainability are reshaping how these machines operate. Thu, 01 Jan 2026 00:00:00 GMT http://yetl.yabesh.ir/yetl1/handle/yetl/4315161 2026-01-01T00:00:00Z