Results 1 to 10 of about 193,159 (246)

Electric Propulsion Methods for Small Satellites: A Review

open access: yesAerospace, 2021
Over 2500 active satellites are in orbit as of October 2020, with an increase of ~1000 smallsats in the past two years. Since 2012, over 1700 smallsats have been launched into orbit. It is projected that by 2025, there will be 1000 smallsats launched per
Dillon O’Reilly   +2 more
doaj   +2 more sources

Self-Propulsion of Chemically Active Droplets [PDF]

open access: yesAnnual Review of Fluid Mechanics, 2022
Microscopic active droplets are able to swim autonomously in viscous flows. This puzzling feature stems from solute exchanges with the surrounding fluid via surface reactions or their spontaneous solubilization and from the interfacial flows resulting ...
S. Michelin
semanticscholar   +1 more source

Identifying Effective Drivers in the Future of Sports Businesses in Khorasan Razavi Province [PDF]

open access: yesJournal of New Studies in Sport Management, 2022
The purpose of this study was to identify effective drivers in the future of sports businesses in Khorasan Razavi province. The participants included experts in management, marketing and sports businesses. The interviews were conducted by snowball method
Mohammad Ali Sahebkaran   +2 more
doaj   +1 more source

Battery Energy Storage Systems in Ships’ Hybrid/Electric Propulsion Systems

open access: yesEnergies, 2023
The shipping industry is going through a period of technology transition that aims to increase the use of carbon-neutral fuels. There is a significant trend of vessels being ordered with alternative fuel propulsion.
M. Kolodziejski, I. Michalska-Pożoga
semanticscholar   +1 more source

Analysis of Effective Drivers in Pattern Framework of Spatial-Policy Making [PDF]

open access: yesجغرافیا و آمایش شهری منطقه‌ای, 2021
Architectural rupture and instability is a pattern of land management with disabilities and theoretical and operational shortcomings that the foundation of this kind of integrated and coordinating approach is always shaken with intensity and weakness ...
Hedayat Darvishi   +3 more
doaj   +1 more source

A Machine-Learning-Based Method for Ship Propulsion Power Prediction in Ice

open access: yesJournal of Marine Science and Engineering, 2023
In recent years, safety issues respecting polar ship navigation in the presence of ice have become a research hotspot. The accurate prediction of propulsion power plays an important role in ensuring safe ship navigation and evaluating ship navigation ...
Li Zhou   +4 more
semanticscholar   +1 more source

Underwater Undulating Propulsion Biomimetic Robots: A Review

open access: yesBiomimetics, 2023
The traditional propeller-based propulsion of underwater robots is inefficient and poorly adapted to practice. By contrast, underwater biomimetic robots show better stability and maneuverability in harsh marine environments.
Gongbo Li   +5 more
semanticscholar   +1 more source

High shear rate propulsion of acoustic microrobots in complex biological fluids

open access: yesScience Advances, 2022
Untethered microrobots offer a great promise for localized targeted therapy in hard-to-access spaces in our body. Despite recent advancements, most microrobot propulsion capabilities have been limited to homogenous Newtonian fluids.
Amirreza Aghakhani   +5 more
semanticscholar   +1 more source

Estimate of Strouhal and Reynolds numbers for swimming penguins

open access: yesJournal of Avian Biology, 2022
Propulsion performance of swimming and flying animals is often evaluated by using dimensionless numbers, such as the Strouhal and Reynolds numbers. They have been shown to allow a better understanding of locomotion efficiency, using relatively simple ...
M. H. Masud, M. La Mantia, P. Dabnichki
doaj   +1 more source

Overview on Digital Twin for Autonomous Electrical Vehicles Propulsion Drive System

open access: yesSustainability, 2022
The significant progress in the electric automotive industry brought a higher need for new technological innovations. Digital Twin (DT) is one of the hottest trends of the fourth industrial revolution. It allows representing physical assets under various
M. Ibrahim   +3 more
semanticscholar   +1 more source

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