Results 1 to 10 of about 41,736 (260)

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

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

Conceptual Design of Fuel Cell Based Hybrid Unmanned Air Vehicle

open access: yesEuropean Mechanical Science, 2021
Unmanned air vehicles (UAVs) are used successfully in many different fields mainly various military and civilian applications. Recently electric powered UAVs have become more preferable due to their better accessibility, cost, transportation and silence.
Kadir Aydın, Sinan Keiyinci
doaj   +1 more source

Overview on Efficient Naval Power Architecture

open access: yesProceedings, 2020
Possible configurations for propulsion and electric power generation on vessels are an important field for the researcher in the naval area. The most important is electric power generation. Nowadays, diesel engines are the main prime movers, although all
Mariana Dumitrescu
doaj   +1 more source

Analyzing Intra-Cycle Velocity Profile and Trunk Inclination during Wheelchair Racing Propulsion

open access: yesSensors, 2022
The analysis of intra-cycle velocity profile of manual wheelchair (MWC) users has been used to highlight the significant role of trunk inertia in propulsion biomechanics. Maximal wheelchair linear velocity has previously been observed to be reached after
Yoann Poulet   +5 more
doaj   +1 more source

Mini/Micro/Nano Scale Liquid Metal Motors

open access: yesMicromachines, 2021
Swimming motors navigating in complex fluidic environments have received tremendous attention over the last decade. In particular, liquid metal (LM) as a new emerging material has shown considerable potential in furthering the development of swimming ...
Li Liu, Dawei Wang, Wei Rao
doaj   +1 more source

Project of universal test stand for underwater vehicles’ thrusters

open access: yesScientific Journal of Gdynia Maritime University, 2020
This article presents the design and implementation of the next stage of research conducted as part of the design and construction of an underwater inspection robot.
Filip Dudek   +6 more
doaj   +1 more source

Present and future of aircraft carriers as a floating diplomatic and military means of deterrence [PDF]

open access: yesINCAS Bulletin, 2011
The aircraft carrier is the most capable offshore military warship the mankind has ever build and is considered as a symbol of the absolute navy and national strenght. Construction of an aircraft carrier is having a great impact on country`s industry and
Miroslav KELEMEN   +3 more
doaj   +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

Comparison of Active Drag Using the MRT-Method and the MAD-System in Front Crawl Swimming

open access: yesProceedings, 2018
The purpose of this study was to compare the active drag values estimated by the MRT-method and the MAD-system. Six male competitive swimmers participated in this study and performed front crawl with arms only condition.
Kenzo Narita   +3 more
doaj   +1 more source

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