Results 61 to 70 of about 80,023 (370)
Formation of a Propeller Structure by a Moonlet in a Dense Planetary Ring [PDF]
, 2011 The Cassini spacecraft discovered a propeller-shaped structure in Saturn's A ring. This propeller structure is thought to be formed by gravitational scattering of ring particles by an unseen embedded moonlet. Self-gravity wakes are prevalent in dense rings due to gravitational instability. Strong gravitational wakes affect the propeller structure. Here,
arxiv +1 more source
A review of variable-pitch propellers and their control strategies in aerospace systems [PDF]
arXiv, 2023 The relentless pursuit of aircraft flight efficiency has thrust variable-pitch propeller technology into the forefront of aviation innovation. This technology, rooted in the ancient power unit of propellers, has found renewed significance, particularly in the realms of unmanned aerial vehicles and urban air mobility.
arxiv
Solid propellant rocket motor and method of making same [PDF]
, 1977 A method is described for making a solid propellant rocket motor having a specific concavity formed within the fuel charge. A mandrel with an aperature wider than that of the casing is inserted within the motor casing and a solidifiable propellant cast ...
Lewis, D. J., Thibodaux, J. G., Jr.
core +1 more source
Bridging Nature and Technology: A Perspective on Role of Machine Learning in Bioinspired Ceramics
Advanced Engineering Materials, EarlyView.Machine learning (ML) is revolutionizing the development of bioinspired ceramics. This article investigates how ML can be used to design new ceramic materials with exceptional performance, inspired by the structures found in nature. The research highlights how ML can predict material properties, optimize designs, and create advanced models to unlock a ...
Hamidreza Yazdani Sarvestani +2 more
wiley +1 more source
Cryogenic propellant management in space: open challenges and perspectives
npj MicrogravityThis paper presents open challenges and perspectives of propellant management for crewed deep space exploration. The most promising propellants are liquid hydrogen and liquid methane, together with liquid oxygen as an oxidizer. These fluids remain liquid
Alessia Simonini +9 more
doaj +1 more source
Volumetric calibration of a propellant utilization system [PDF]
, 1970 Method of calibrating capacitance-type propellant mass sensors provides meaningful mass units accurate to within one percent of the total load. Neither special propellant loading nor test firing is required.
Lenning, J. J., Simko, T.
core +1 more source
Advanced Engineering Materials, EarlyView.Molecular dynamics simulations are advancing the study of ribonucleic acid (RNA) and RNA‐conjugated molecules. These developments include improvements in force fields, long‐timescale dynamics, and coarse‐grained models, addressing limitations and refining methods.
Kanchan Yadav, Iksoo Jang, Jong Bum Lee
wiley +1 more source
Perancangan Propeler Self-Propelled Barge
Jurnal Teknik ITS, 2013 Makalah ini menyampaikan suatu penelitian tentang perancangan propeler yang optimal beserta pemilihan daya mesin yang efisien pada self-propelled barge dengan memperhitungkan besarnya nilai tahanan dari barge tersebut. Dengan penambahan sistem propulsi, diharapkan barge dapat beroperasi dengan lebih efisien dibandingkan saat barge beroperasi ...
Billy Teguh kurniawan, Eko Budi Djatmiko
openaire +3 more sources
Advanced Engineering Materials, EarlyView.Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat +6 more
wiley +1 more source
Determining the major propellants of I.R. Iran’s defensive diplomacy in regional and international levels [PDF]
آیندهپژوهی دفاعی, 2016 Defensive Diplomacy is a part of government policy which plays role as an important tool in achieving the major objectives of the armed forces and its purpose can be considered to develop favorable national and international political conditions for ...
Hossein Minaee +3 more
doaj