Results 41 to 50 of about 32,293 (191)

Toward a history of the space shuttle. An annotated bibliography [PDF]

This selective, annotated bibliography discusses those works judged to be most essential for researchers writing scholarly studies on the Space Shuttle's history.
Gillette, Aaron K., Launius, Roger D.
core   +1 more source

Developing Primary Propulsion for the Ares I Crew Launch Vehicle and Ares V Cargo Launch Vehicle [PDF]

, 2007
In accordance with the U.S. Vision for Space Exploration, NASA has been tasked to send human beings to the moon, Mars, and beyond. The first stage of NASA's new Ares I crew launch vehicle (Figure 1), which will loft the Orion crew exploration vehicle ...
Burt, Rick, Ezell, Timothy G., Priskos, Alex S., Williams, Thomas L.   +3 more
core   +1 more source

Decarbonizing China's Freight Sector: Spatial Impacts of Carbon Taxation on Trade Patterns and Production Allocation in a CGE Framework

Earth's Future, Volume 13, Issue 8, August 2025.
Abstract Reducing emissions in the freight sector is a key focus in China's pursuit of sustainability. Previous studies have not adequately addressed the complex interplay between freight activity, commodity movements, and geographical distances in evaluating mitigation policies.
Xian Wang, Junfeng Liu, Huihuang Wu, Xiurong Hu, Yuqing Wang, Ying Liu, Jianmin Ma, Shu Tao   +7 more
wiley   +1 more source

Experimental Study of the Effect of the Initial Droplet Diameter on the Evaporation Characteristics of Unsymmetrical Dimethylhydrazine Droplets in a Subcritical Environment

Aerospace
The evaporation characteristics of unsymmetrical dimethylhydrazine droplets with different initial diameters in a subcritical environment were experimentally investigated with the temperature–pressure separation technique.
Gangqiang Wu, Wansheng Nie, Congling Yang, Siyin Zhou, Hui Wang   +4 more
doaj   +1 more source

From Earth to Orbit: An assessment of transportation options [PDF]

The report assesses the requirements, benefits, technological feasibility, and roles of Earth-to-Orbit transportation systems and options that could be developed in support of future national space programs.
Blond, Edmund, Brill, Yvonne C., Budiansky, Bernard, Cooper, Robert S., Demisch, Wolfgang H., Gavin, Joseph G., Jr., Hawk, Clark W., Kerrebrock, Jack L., Lichtenberg, Byron K., Mager, Artur   +9 more
core   +1 more source

Design and Construction of an Experiment for the Investigation of the Effects of Gust on Flapping Wing Micro Air Vehicle Power Consumption [PDF]

, 2013
In recent years, the promising nature of flapping wing flight has led researchers to investigate the wing morphology and unsteady wing aerodynamics found in insects to aid in the design of modern micro air vehicles (MAVs).
Hiller, Brett
core   +1 more source

Spring and Power in Hovering Ornithopters

Advanced Intelligent Systems, Volume 7, Issue 7, July 2025.
Only small ornithopters can hover, longest at the hummingbird size. This article reviews the drive and power of these hovering machines, focusing on elastic energy and thrust boosters. Unlike two‐winged designs, X‐winged and multiple‐V‐winged ornithopters benefit from lower disk loading and slower, smaller wingbeats, and the clap‐and‐fling effect ...
Gih‐Keong Lau, Yao‐Wei Chin, Shih‐Chun Lin, Yu‐Hsiang Lai, Boo Cheong Khoo   +4 more
wiley   +1 more source

Transformer Encoder Enhanced by an Adaptive Graph Convolutional Neural Network for Prediction of Aero-Engines’ Remaining Useful Life

Aerospace
Accurate prediction of remaining useful life (RUL) plays a significant role in ensuring the safe flight of aircraft. With the recent rapid development of deep learning, there has been a growing trend towards more precise RUL prediction.
Meng Ma, Zhizhen Wang, Zhirong Zhong
doaj   +1 more source

Reusability Studies for Ares I and Ares V Propulsion [PDF]

, 2008
With a mission to continue to support the goals of the International Space Station (ISS) and explore beyond Earth orbit, the United States National Aeronautics and Space Administration (NASA) is in the process of launching an entirely new space ...
Barrett, Greg, Priskos, Alex S., Schorr, Andrew A., Williams, Thomas J.   +3 more
core   +2 more sources

An Omnidirectional, High Power Density Magneto–Mechano–Electric Energy Harvester Using PNN–PZT Piezoceramic Operating in Decoupling Bending Mode

Advanced Energy and Sustainability Research, Volume 6, Issue 6, June 2025.
Decoupling bending modes in magneto–mechano–electric energy harvesters, featuring two bending modes responding to different excitations with identical resonant frequencies, enables effective harvesting stray magnetic field energy in diverse environments.
Wei Peng, Bin Wang, Jianglei Chang, Zhen Liu, Genshui Wang, Zhi Cheng, Liang Ma, Shuxiang Dong   +7 more
wiley   +1 more source