Results 11 to 20 of about 3,494,207 (343)

Relations of speed and specific motor abilities of special unit members [PDF]

open access: yesSport - Nauka i Praksa, 2021
The operational abilities of the members of the army are defined by the factors of morphology, function, levels of motor skills, health, etc. In special brigades, a high level of motor skills is required for the successful realization of assigned tasks ...
Golubović Mihajlo   +3 more
doaj   +1 more source

Comparative design and performance of surface water irrigation pumps for smallholder farmers in South and Southeast Asia

open access: yesJournal of Mechanical Engineering and Sciences, 2022
An experimental study on the performance of various Thai irrigation pump impellers and a newly design conical hollow-shaped impeller was investigated. They were tested experimentally. The design pump based on a similar theory was developed.
W. Sanghirun, W. Asvapoositkul
doaj   +1 more source

The Importance of the Speed Execution in the Technical Procedures Specific to the Style Ashihara Karate

open access: yesBulletin of the Transilvania University of Braşov: Series IX Sciences of Human Kinetics, 2023
This article brings to the attention of specialists in the field, considerations regarding the determining character of the execution speed in the technical procedures that are specific to the training of Ashihara Karate practitioners. The purpose of the
D. Mocioaca, M. Dragomir
doaj   +1 more source

Influence of rotational speed on performance of low specific speed hydraulic turbine in turbine mode

open access: yesAdvances in Mechanical Engineering, 2022
To study the influence of rotational speed on the performance of hydraulic turbine in turbine mode (T-type turbine), the performance of turbine at different rotational speed was predicted through theoretical analysis, based on the Navier-Stokes equation ...
Yanpin Li   +6 more
doaj   +1 more source

Reading Specific Small Saccades Predict Individual Phonemic Awareness and Reading Speed

open access: yesFrontiers in Neuroscience, 2021
Small fixational eye-movements are a fundamental aspect of vision and thought to reflect fine shifts in covert attention during active viewing. While the perceptual benefits of these small eye movements have been demonstrated during a wide range of ...
Samy Rima   +2 more
doaj   +1 more source

RESEARCH OF SPEED-STRENGTH QUALITIES OF SPECIFIC MUSCLE GROUPS IN ROWERS [PDF]

open access: yesJournal of Applied Sports Sciences, 2018
The power of the stroke in rowing is one of the main factors which determines good sport results. In this relation, increasing of power is а key task during rowers’ muscular and strength training. The main purpose of the current research was to determine
Daniela Oronova   +3 more
doaj   +3 more sources

Examining the Differential Role of General and Specific Processing Speed in Predicting Mathematical Achievement in Junior High School

open access: yesJournal of Intelligence, 2021
Processing speed is divided into general (including perceptual speed and decision speed) and specific processing speed (including reading fluency and arithmetic fluency).
Dazhi Cheng   +4 more
doaj   +1 more source

EFFECT OF THE FLOW FIELD DEFORMATION IN THE WIND TUNNEL ON THE AERODYNAMIC COEFFICIENTS

open access: yesActa Polytechnica, 2015
The flow field quality has a principal signification at wind tunnel measurement. The creation of the flow field of air by fan leads to the rotation of entire flow field which is, moreover, deformed at the bends of the wind tunnel with close circulation ...
Dušan Maturkanič
doaj   +1 more source

CFD and Energy Loss Model Analysis of High-Speed Centrifugal Pump with Low Specific Speed

open access: yesApplied Sciences, 2022
High-speed centrifugal pumps with low specific speed have the characteristics of a small flowrate, a high head, and being compact and light weight, making them promising candidates for applications in the thermal management of aerospace and electronic ...
Rong Xue   +5 more
doaj   +1 more source

Forces on Centrifugal Pump Impellers [PDF]

open access: yes, 1985
Forces are exerted on a centrifugal pump impeller, due to the asymmetry of the flow caused by the volute of diffuser, and to the motion of the center of the impeller whenever the shaft whirls. Recent work in the measurement of these forces as a function
Acosta, Allan   +3 more
core   +1 more source

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