Results 21 to 30 of about 267,041 (297)

Influence of the boundary conditions on the natural frequencies of a Francis turbine [PDF]

open access: yes, 2016
Natural frequencies estimation of Francis turbines is of paramount importance in the stage of design in order to avoid vibration and resonance problems especially during transient events.
Bossio, Matias   +5 more
core   +1 more source

PGR and Its Application Method Affect Number and Length of Runners Produced in ‘Maehyang’ and ‘Sulhyang’ Strawberries

open access: yesAgronomy, 2019
Vegetative propagation using runner plants is an important method to expand the cultivation area for the strawberry (Fragaria × ananassa Duch.).
Chen Liu   +4 more
doaj   +1 more source

Using Artificial Neural Network to Solve Multi-objective Optimization of Francis Turbine Runner

open access: yesGuan'gai paishui xuebao, 2023
【Background】 Technical renovation of turbine equipment in hydropower plant has attracted increased attention due to its low investment, quick return and high economic benefit.
WANG Rongtao, LAI Xide, CHEN Xiaoming
doaj   +1 more source

Limitations of Modern Diagnostic and Prognostic Systems for a Hydraulic Unit’s Health

open access: yesEng, 2021
Modern diagnostic systems for the hydraulic unit’s health play an important role in ensuring the reliability and safety of the hydroelectric power plant (HPP). However, they cannot provide timely detection of such dangerous operational defects as fatigue
Evgeniia Georgievskaia
doaj   +1 more source

Varied response to mirror gait retraining of gluteus medius control, hip kinematics, pain, and function in 2 female runners with patellofemoral pain. [PDF]

open access: yes, 2013
STUDY DESIGN: Case report. BACKGROUND: The underlying mechanism of the changes in running mechanics after gait retraining is presently unknown. This case report assesses changes in muscle coordination and kinematics during treadmill running and step ...
Binkley JM   +5 more
core   +1 more source

Socketed Axes of the Irish Late Bronze Age: Understanding the Internal Rib Phenomenon

open access: yesEXARC Journal, 2020
This study explores the possibility that the internal rib commonly recognised inside bronze socketed axes may suggest an entirely different step in the casting process than previously thought. The internal rib, more commonly referred to as a ‘hafting rib’
Terry Runner
doaj  

Investigation of a High Head Francis Turbine at Runaway Operating Conditions

open access: yesEnergies, 2016
Hydraulic turbines exhibit total load rejection during operation because of high fluctuations in the grid parameters. The generator reaches no-load instantly. Consequently, the turbine runner accelerates to high speed, runaway speed, in seconds.
Chirag Trivedi   +2 more
doaj   +1 more source

Identification of runner fatigue stages based on inertial sensors and deep learning

open access: yesFrontiers in Bioengineering and Biotechnology, 2023
Introduction: Running is one of the most popular sports in the world, but it also increases the risk of injury. The purpose of this study was to establish a modeling approach for IMU-based subdivided action pattern evaluation and to investigate the ...
Pengfei Chang   +5 more
doaj   +1 more source

The impact of the COVID-19 pandemic on the mood and family relationships of runners

open access: yesFrontiers in Psychology
IntroductionThe aim of this study was to analyze the impact of the COVID-19 lockdown on the mood of amateur runners and on their relationships with their partners and families.MethodsAdult runners 18 years or older (N = 260) completed an online survey ...
Anna Vilaregut   +4 more
doaj   +1 more source

The reliability and operation safety of hydraulic units beyond design lifetime

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2018
The issues of reliability and operation safety of power equipment, including hydraulic units of hydropower plants, are becoming more and more relevant with the increasing the service life.
E. V. Georgievskaia
doaj   +1 more source

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