Results 131 to 140 of about 36,758 (316)

Review of Thermally Activated Twisted Coiled Polymer Actuators: A Materials Science Perspective

Advanced Functional Materials, EarlyView.
Thermally activated twisted and coiled polymer actuators (TCPAs) combine lightweight design, large deformation, and scalable fabrication for soft robotic and wearable applications. This review connects polymer structure, processing history, helix geometry, and thermomechanical characterization to actuator performance, highlighting current challenges in
Nadja Schenk, Lukas Benecke, Chokri Cherif, Johannes Mersch   +3 more
wiley   +1 more source

Electroacoustic-Propulsion [PDF]

, 2018
Present and future spaceflight missions depend on the ability to produce high exhaust velocities while reducing the dependence on chemical fuel and its mass onboard a spaceflight vehicle. Oscillation of gaseous molecules during pre-ejection stages via an
Cory Andrew Hofstad (5368814)
core   +1 more source

Shaping Matter with Acoustic Waves: From Particles to Functional Structures

Advanced Functional Materials, EarlyView.
Acoustic‐directed assembly is reviewed as a materials‐oriented strategy for organizing particles, polymers, metals, and biological systems into functional structures. The review distinguishes reversible manipulation from permanent structure formation through medium fixation, particle fixation, and in situ material generation, highlighting routes toward
Avraham Kenigsberg, Shelly Zlotnikov, Maya Fiorentino, Yuval Elias, Ornit Nagler‐Avramovitz, Hagay Shpaisman   +5 more
wiley   +1 more source

Stationary Propulsive Performance of a Green Monopropellant Demonstrator for the PulCheR Project [PDF]

, 2014
In the framework of the PulCheR project, an experimental test campaign on a 20 N monopropellant thruster prototype has been carried out with the aim of assessing the capability of a new Pt/Al2O3 catalytic system of effectively decomposing 98 ...
D'AGOSTINO, LUCA, Lucio, Torre, VALENTINI, DARIO, PASINI, ANGELO, PACE, GIOVANNI   +4 more
core  

Study on the Effect of Flexible Passive Deformation of Tuna Caudal Fin on Swimming Performance

Biomimetics
The high-speed and efficient swimming characteristics of tuna are valuable for designing bio-inspired underwater vehicles. Tuna use their highly deformable caudal fins as propulsors during swimming.
Shi-Yun Zhong, Tian-Yu Gao, Wei-Pei Huang, Peng-Nan Sun, Chao Yu, Wang Zhao, Zhi-Qun Guo   +6 more
doaj   +1 more source

Packed Hydrogel Microfibers as Scaffolds Supporting Dynamic Cellular Behavior and Biomaterial Inks in 3D Printing

Advanced Healthcare Materials, EarlyView.
Packed hydrogel microfiber (PHM) materials consist of flexible and high aspect ratio hydrogel components that, as a bulk material, are simultaneously mechanically robust and dynamic. Cells cultured in or on PHM scaffolds can be influenced by topographical cues or interact with a dynamic environment that permits cell spreading and multicellular ...
M. Gregory Grewal, Remington M. Martinez, Georgia T. Helein, Montserrath G. Ibarra Rivera, Rodolfo Martinez Jr., Jenna L. Sumey, Steven R. Caliari, Christopher B. Highley   +7 more
wiley   +1 more source

Quantitative Regime Comparison and Engine Performance Assessment: Regime-Dependent Baselining and Comparison for In-Service Propulsion Evaluation

Journal of Marine Science and Engineering
The in-service assessment of marine propulsion engines requires more than nominal rating comparison because operating severity is shaped by propeller demand, resistance growth, air-path response, and thermal state.
Nicoleta Acomi, Mykyta Chervinskyi
doaj   +1 more source

Multidimensional Cellular Micro‐Compartments to Model Invasive Lobular Carcinoma Dormancy

Advanced Healthcare Materials, EarlyView.
Invasive lobular carcinoma (ILC) is an understudied subtype of breast cancer that is susceptible to late recurrences. In this study, micro‐compartmentalization techniques spanning multiple dimensions, including 2D, pseudo‐3D, and 3D, are integrated to uncover the mechanisms underlying ILC dormancy, revealing the central role of p27Kip1.
Xilal Y. Rima, Sarmila Majumder, Divya S. Patel, Chunyu Hu, Hong Li, Xin Huang, Kim Truc Nguyen, Jacob Doon‐Ralls, Chiranth K. Nagaraj, Mangesh D. Hade, Setty M. Magaña, Eswar Shankar, Xiaoli Zhang, Daniel G. Stover, Bhuvaneswari Ramaswamy, Eduardo Reátegui   +15 more
wiley   +1 more source

Non-Keplerian orbits using low thrust, high ISP propulsion systems [PDF]

, 2009
The technology of high ISP propulsion systems with long lifetime and low thrust is improving, and opens up numerous possibilities for future missions.
Bosquillon de Frescheville, Francois, Biggs, James, Vasile, Massimiliano, BIGGS, JAMES DOUGLAS, McInnes, Colin, Biggs, J.D., Vasile, M., Macdonald, Malcolm, Mclnnes, Colin, McKay, Robert, McKay, R.J., Macdonald, M., McInnes, C.R., De Frescheville, Francois Bosquillon   +13 more
core  

Review of Auxiliary Detonation Methods for Rotating Detonation Based on Liquid Hydrocarbon Fuel

气体物理
Liquid fuels with high volumetric energy density are the basis for supporting rotating detonation engines for engineering applications. However, the use of low-reactivity liquid fuels will lead to difficulties in initiating and propagating two-phase ...
Chen SHU, Kaiqi YANG, Yiheng TONG, Wei LIN   +3 more
doaj   +1 more source