Results 31 to 40 of about 362 (192)

Stochastic Entanglement of Deterministic Origami Tentacles For Robust Robotic Grasping

Advanced Science, EarlyView.
This study introduces an origami tentacle gripper to robustly grasp objects‐in air, underwater, and even in orbital space‐by exploiting a synergy between local, deterministic deformation programming and global, stochastic entanglements. A single origami tentacle can be designed to coil with a simple tendon pull.
Alec Boron, Bokun Zheng, Ziyang Zhou, Noel Naughton, Suyi Li   +4 more
wiley   +1 more source

Beyond Traditional Phenolics: Disulfide Bonds for Performance Enhancement of Aerospace Ablation‐Resistant Materials from Processing to Recycling

Advanced Science, EarlyView.
The dynamic disulfide bonds facilitated the development of high‐performance aerospace ablation‐resistant materials. At moderate temperature, the dissociation and recombination of disulfide bonds ensured excellent processability, mechanical properties, and recycling ability of phenolic resin; at high temperature, cleavage of disulfide bonds produced ...
Yu Li, Boyuan Hu, Xiaolong Xing, Huan Yang, Ziqi Zhang, Cheng Bian, Ruixue Bai, Ling Yue, Chengshuang Zhang, Xinli Jing   +9 more
wiley   +1 more source

Analysis of advanced cooling strategies for rocket engines conveying ternary hybrid nanofluids with second slip conditions and melting heat transfer

Case Studies in Thermal Engineering
Effective cooling in rocket engines is essential to prevent overheating and ensure efficient performance under extreme operating conditions. This study presents a comprehensive investigation into advanced cooling strategies for rocket engines utilizing ...
Hatem Gasmi, A.M. Obalalu, Umair Khan, Anuar Ishak, Hami Gündoğdu, Nermeen Abdullah, Samia Elattar, Ahmed M. Galal   +7 more
doaj   +1 more source

Performances Study of a Hybrid Rocket Engine

INCAS BULLETIN, 2018
This paper presents a study which analyses the functioning and performances optimization of a hybrid rocket engine based on gaseous oxygen and polybutadiene polymer (HTPB). Calculations were performed with NASA CEA software in order to obtain the parameters resulted following the combustion process.
openaire   +2 more sources

Bio‐Inspired Gradient Coatings Enhance the Leading Edge Erosion Resistance of Wind Blades

Advanced Science, EarlyView.
Rain‐induced erosion of the wind turbine blade leading edge poses a critical challenge to maintenance and operation. Here, we propose a bio‐inspired approach for erosion protection utilising a platelet‐reinforced polyurethane coating with a graded through‐thickness architecture.
Natalia Sofia Guevara‐Sotelo, Julie Teuwen, Kunal Masania   +2 more
wiley   +1 more source

Emerging Memory and Device Technologies for Hardware‐Accelerated Model Training and Inference

Advanced Electronic Materials, EarlyView.
This review investigates the suitability of various emerging memory technologies as compute‐in‐memory hardware for artificial intelligence (AI) applications. Distinct requirements for training‐ and inference‐centric computing are discussed, spanning device physics, materials, and system integration.
Yoonho Cho, Dae‐won Kim, Yujin Kim, Jung‐Heum Na, Yuwon Jeong, Dong‐Yeop Lee, Shinhyun Choi   +6 more
wiley   +1 more source

Innovative Methods to Enhance the Combustion Properties of Solid Fuels for Hybrid Rocket Propulsion

Aerospace, 2019
The low regression rates for hydroxyl-terminated polybutadiene (HTPB)-based solid fuels and poor mechanical properties for the alternative paraffin-based liquefying fuels make today hybrid rocket engines far from the outstanding accomplishments of solid ...
Suhang Chen, Yue Tang, Wei Zhang, Ruiqi Shen, Hongsheng Yu, Yinghua Ye, Luigi T. DeLuca   +6 more
doaj   +1 more source

NUMERICAL MODELING OF COMBUSTION PROCESSES IN HYBRID ROCKET ENGINES

International Journal of Energetic Materials and Chemical Propulsion, 2016
Nowadays, numerical simulations of combustion processes in hybrid rockets are generally considered as a qualitative tool used mainly to describe the flow field inside the rocket engine. A research effort is of major importance in order to change this trend.
Mazzetti, Alessandro, BARBANTE, PAOLO FRANCESCO   +1 more
openaire   +2 more sources

Strengthening urban resilience in China through underground infrastructures management: Addressing global climate challenges with technological solutions

Deep Underground Science and Engineering, EarlyView.
This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh, Tonni Agustiono Kurniawan, Christia Meidiana, Abdelkader Anouzla, Faissal Aziz, Imran Ali, Joan Cecilia C. Casila, M. Imran Khan, Dongdong Zhang, Meihui Jiang, Mohd Hafiz Dzarfan Othman, Md Munir Hayet Khan, Kasun Kumara Dissanayake   +12 more
wiley   +1 more source

Approaches to Low Fuel Regression Rate in Hybrid Rocket Engines

International Journal of Aerospace Engineering, 2012
Hybrid rocket engines are promising propulsion systems which present appealing features such as safety, low cost, and environmental friendliness. On the other hand, certain issues hamper the development hoped for.
Dario Pastrone
doaj   +1 more source