Results 21 to 30 of about 2,323,356 (342)
Speed reductions, inequalities, and transport [PDF]
Injury Prevention, 2001 Editor,—We read the editorials in the BMJ and Injury Prevention about speed limits with interest1, 2 and would like to share some of the Scottish experience on speed reduction. Councils throughout Scotland are conducting trials of advisory 20 mph limits as part of a Scottish Executive initiative. In Lothian these are generally in residential areas and
D Gorman, M Douglas, P Noble
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Aerodynamic Drag Reduction on Speed Skating Helmet by Surface Structures
Applied Sciences, 2022 The aerodynamic drag for speed skating helmets with surface structures was investigated in this work by using numerical and experimental methods. Computational fluid dynamic (CFD) research was performed to analyze the detail of the flow field around the ...
Yanqing Wang +5 more
doaj +1 more source
Speeding Multicast by Acknowledgment Reduction Technique (SMART) [PDF]
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011 We present a novel feedback protocol for wireless broadcast networks that utilize linear network coding. We consider transmission of packets from one source to many receivers over a single-hop broadcast erasure channel. Our method utilizes a predictive model to request feedback only when the probability that all receivers have completed decoding is ...
Rezaee, Arman +2 more
openaire +4 more sources
Variable-speed tail rotors for helicopters with variable-speed main rotors [PDF]
, 2017 Variable tail rotor speed is investigated as a method for reducing tail rotor power, and improving helicopter performance. A helicopter model able to predict the main rotor and tail rotor powers is presented, and the flight test data of the UH-60A ...
Barakos, G.N., Han, D.
core +1 more source
Let’s Make Ball Balancing Great Again: Why You Should Use Temporary Speed Reduction
Machines, 2020 Automatic ball balancing is a technique adopted in rotordynamics to reduce unknown rotor unbalance automatically. This technique sounds appealing as it can ease a panoply of balancing issues considerably.
Gabriël Van De Velde +3 more
doaj +1 more source
Combined methods for torque variation reduction of high-speed FSPM
Energy Reports, 2023 Flux switching permanent magnet machine (FSPM) with six slots and four poles (6/4) shows great potential for high-speed operation. However, the 6/4 FSPM suffers from high cogging torque at no load and loaded torque variation.
Jiayue Zhou, Xi Xiao
doaj +1 more source
Network effects of intelligent speed adaptation systems [PDF]
, 2004 Intelligent Speed Adaptation (ISA) systems use in-vehicle electronic devices to enable the speed of vehicles to be regulated externally. They are increasingly appreciated as a flexible method for speed management and control, particularly in urban areas.
Liu, R., Tate, J.E.
core +1 more source
Speed Bumps Impact on Motor Transport Noise
The Baltic Journal of Road and Bridge Engineering, 2015 Most accidents are caused by excessive speed or aggressive driver behavior. One of the most popular speed regulation implement is speed bumps. However, there are some problems with speed bumps as well – it has been noticed that speed bumps increase motor
Tomas Januševičius, Rasa Akelaitytė
doaj +1 more source
Varying speed of light cosmology from a stringy short distance cutoff [PDF]
, 2001 It is shown that varying speed of light cosmology follows from a string-inspired minimal length uncertainty relation. Due to the reduction of the available phase space volume per quantum mode at short wavelengths, the equation of state of ...
Niemeyer, J. C.
core +2 more sources
Design and implementation of speed fluctuation reduction for a ball screw feed system at low-speed operation [PDF]
Mechanical Sciences, 2020 In the high-precision servo feed system, when the permanent magnet synchronous motor (PMSM) is operated at low speed in the classical drive feed system (CDFS), the speed fluctuation caused by the motor torque harmonics seriously affects the speed ...
Z. Wang +9 more
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