Results 81 to 90 of about 410,560 (293)

Stochastic learning and extremal-field map based autonomous guidance of low-thrust spacecraft. [PDF]

Sci Rep, 2022
Singh SK, Junkins JL.
europepmc   +1 more source

Optimisation of Low-Thrust and Hybrid Earth-Moon Transfers [PDF]

, 2016
This paper presents an optimization procedure to generate fast and low-∆v Earth-Moon transfer trajectories, by exploiting the multi-body dynamics of the Sun-Earth-Moon system.
Ceriotti, Matteo, De Sousa Silva, Priscilla A., Sullo, Nicola, Terra, Maisa O.   +3 more
core  

Ladder‐Type Benzene‐Perylene Dyes with Efficient Laser Properties in the Near‐IR by Detracting/Activating Low/High Frequency Vibronic Modes

Advanced Functional Materials, EarlyView.
The NNR‐n series of oligomeric nanographenes delivers exceptional emission performance. This work shows that this performance is originated by their ladder‐type structure, which effectively deactivates low‐frequency vibronic modes. This deactivation neglects the main pathway for non‐emissive deactivation, even in the near‐infrared region. The potential
Marcos Díaz‐Fernández, Álex Farrando Pérez, Fernando Gordillo Gámez, Pedro G. Boj, José M. Villalvilla, José A. Quintana, Yanpei Wan, Daniel Aranda, José Manuel Marín‐Beloqui, Jishan Wu, Zebing Zeng, María A. Díaz‐García, Juan Casado   +12 more
wiley   +1 more source

Continuous Low-Thrust Maneuver Planning for Space Gravitational Wave Formation Reconfiguration Based on Improved Particle Swarm Optimization Algorithm. [PDF]

Sensors (Basel), 2023
Lu Z, Wang J, Lian X, Zhang J, Zhang Y, Yang J.   +5 more
europepmc   +1 more source

The calculated effect of trailing-edge flaps on the take-off of flying boats [PDF]

The results of take-off calculations are given for an application of simple trailing-edge flaps to two hypothetical flying boats, one having medium wing and power loading and consequently considerable excess of thrust over total resistance during the ...
Bell, J W, Parkinson, J E
core   +1 more source

Combinatorial Synthesis of Next Generation Water‐Soluble Quaternized N‐Halamine Oligomers with Long‐Lasting Antiviral Properties

Advanced Functional Materials, EarlyView.
A combinatorial library of dual‐functional antiviral oligomers incorporating N‐halamine and quaternary ammonium functionalities is developed for long‐lasting antiviral activity. The lead materials exhibit rapid and durable antiviral activity against SARS‐CoV‐2 variants and influenza H1N1, with 4 to 5 log reduction in viral copies at 5 mg mL−1 ...
Eid Nassar‐Marjiya, Konda Reddy Kunduru, Krishanu Ghosal, Luna Rizik, Nofar Atari, Mahran Daifa, Neta Kutner, Bassma Khamaisi, Qi Wu, Simran Jindal, Merna Shaheen‐Mualim, Ranabir Majumder, Mahitosh Mandal, Michal Mandelboim, Shady Farah   +14 more
wiley   +1 more source

A Shape-Based Approach For Low-Thrust Earth-Moon Trajectories Initial Design. [PDF]

J Guid Control Dyn, 2022
Vijayakumar M, Abdelkhalik O.
europepmc   +1 more source

Patterning the Void: Combining L‐Systems with Archimedean Tessellations as a Perspective for Tissue Engineering Scaffolds

Advanced Functional Materials, EarlyView.
This study introduces a novel multi‐scale scaffold design using L‐fractals arranged in Archimedean tessellations for tissue regeneration. Despite similar porosity, tiles display vastly different tensile responses (1–100 MPa) and deformation modes. In vitro experiments with hMSCs show geometry‐dependent growth and activity. Over 55 000 tile combinations
Maria Kalogeropoulou, Kenny A. van Kampen, Pierpaolo Fucile, Carlos Mota, Lorenzo Moroni   +4 more
wiley   +1 more source

Multi-objective exploration of multistaged ducted thrusters [PDF]

AIP Advances
Solid-state electroaerodynamic propulsion systems can generate thrust by ejecting ionized air as a plasma jet. Although this concept promises nearly silent drones, the achievable thrust density has so far remained low.
T. Nozaki, H. I. Krebs, X. Jiang, S. Shimizu, H. Shibata   +4 more
doaj   +1 more source

Low heat transfer oxidizer heat exchanger design and analysis [PDF]

The RL10-IIB engine, a derivative of the RLIO, is capable of multi-mode thrust operation. This engine operates at two low thrust levels: tank head idle (THI), which is approximately 1 to 2 percent of full thrust, and pumped idle (PI), which is 10 percent
Kanic, P. G., Kmiec, T. D., Peckham, R. J.   +2 more
core   +1 more source