Results 61 to 70 of about 16,009 (301)
Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроениеIn this paper, various configurations of jet nozzles are analyzed, as well as their design. The effects of the inlet chamfer of jet nozzles on their flow rate and range are considered.
Yu. I. Ageenko, A. S. Bubnova
doaj +1 more source
The gravitational wave rocket [PDF]
Class.Quant.Grav. 14 (1997) 2895-2904, 1997 Einstein's equations admit solutions corresponding to photon rockets. In these a massive particle recoils because of the anisotropic emission of photons. In this paper we ask whether rocket motion can be powered only by the emission of gravitational waves. We use the double series approximation method and show that this is possible.
arxiv +1 more source
Marketing Strategies in Nanomaterials for Sensor Applications: Bridging Lab to Market
Global Challenges, Volume 9, Issue 5, May 2025.This work discusses strategies for the successful commercialization of nanomaterial‐based sensors, including regulatory compliance and industry collaboration. It highlights unique value propositions, intellectual property protection, and customer education to enhance market acceptance.
Anoop Singh +9 more
wiley +1 more source
Drone Launched Short Range Rockets [PDF]
Aerospace, 7(76), 2020, 2021 A concept of drone launched short range rockets (DLSRR) is presented. A drone or an aircraft rises DLSRR to a release altitude of up to 20 $km$. At the release altitude, the drone or an aircraft is moving at a velocity of up to 700 $m/s$ and a steep angle of up to 68$^o$ to the horizontal. After DLSRRs are released, their motors start firing.
arxiv
Oxide‐Based Ceramic Matrix Composites for High‐Temperature Environments: A Review
Advanced Engineering Materials, Volume 27, Issue 7, April 2025.This review examines oxide‐based ceramic matrix composites, focusing on their processing, composition, and mechanical properties for high‐temperature applications. Key topics include oxidation resistance, failure mechanisms, and corrosion behavior, with insights into their potential use in aerospace, nuclear power, and other high‐performance industries.
Karthikeyan Ramachandran +2 more
wiley +1 more source
Advanced Science, Volume 12, Issue 13, April 3, 2025.This study reports the proof‐of‐concept demonstration of novel, additively manufactured, droplet‐emitting electrospray emitter arrays for CubeSat thruster applications. The modular thruster design incorporates multiscale features that enable scaling up thrust with low power consumption by employing two different vat photopolymerization technologies, i ...
Hyeonseok Kim +1 more
wiley +1 more source
Two-axis winch installer for heavy ducts in confined space [PDF]
, 1969 Two-axis winching and traversing device is used for installing liquid-propellant rocket-engine fuel and liquid oxygen suction ducts between the valves and the rocket engine on a test stand.
Cox, E. F.
core +1 more source
Revista Mexicana de Fisica, 49, 191 (2003), 2012 Elementary concepts from general physics and thermodynamics have been used to analyze rocket propulsion. Making some reasonable assumptions, an expression for the exit velocity of the gases is found. From that expression one can conclude what are the desired properties for a rocket fuel.
arxiv
Choose Your Own Question: Encouraging Self-Personalization in Learning Path Construction [PDF]
arXiv, 2020 Learning Path Recommendation is the heart of adaptive learning, the educational paradigm of an Interactive Educational System (IES) providing a personalized learning experience based on the student's history of learning activities. In typical existing IESs, the student must fully consume a recommended learning item to be provided a new recommendation ...
arxiv
ChemCatChem, Volume 17, Issue 8, April 15, 2025.Transfer hydrogenation serves as an alternative platform to promote facile organic transformation in a selective and clean manner, due to its atomic economy, high efficiency, and sustainability. Hydrazine hydrate is one of the common reducing agents used in the selective transfer hydrogenation/reduction methodologies.
Michael G. Kallitsakis +2 more
wiley +1 more source