Results 31 to 40 of about 195,236 (290)

Numerical study on aerodynamic effects in passive pitching dynamics of insect flapping wings

open access: yesNihon Kikai Gakkai ronbunshu, 2014
This study is concerned with aerodynamic effects in passive pitching dynamics of insect flapping wings, which would be based on the Fluid-Structure Interaction (FSI). Thus, we evaluated them using three-dimensional numerical analyses for the FSI based on
Daisuke ISHIHARA   +2 more
doaj   +1 more source

Application of a New Dispatch Methodology to Identify the Influence of Inertia Supplying Wind Turbines on Day-Ahead Market Sales Volumes

open access: yesEnergies, 2021
Power system inertia is an essential part of grid frequency control. The number of synchronously connected machines, which inherently provide inertia, is decreasing due to the transition to renewable energies.
Henning Thiesen, Clemens Jauch
doaj   +1 more source

The Impact of Frequency Support by Wind Turbines on the Small-Signal Stability of Power Systems

open access: yesEnergies, 2022
Rising wind energy integration, accompanied by a decreasing level of system inertia, requires additional sources of ancillary services. Wind turbines based on doubly fed induction generators (DFIGs) can provide inertial and primary frequency support when
Antonio Pepiciello   +2 more
doaj   +1 more source

Development and Investigation of a Synthetic Inertia Algorithm

open access: yesApplied Sciences, 2022
In this article, we present a synthetic inertia (SI) algorithm that allows for the simulation of the inertia response of a traditional generator to an electrical power system.
Paulius Cicėnas, Virginijus Radziukynas
doaj   +1 more source

Exercise Capacity, Physical Activity, Fatigue, and Neurocognitive Function in Adult Survivors of Childhood Acute Lymphoblastic Leukemia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Adult survivors of childhood acute lymphoblastic leukemia (ALL) are at risk of reduced exercise capacity, decreased physical activity levels, persistent fatigue, and neurocognitive deficits. The aim was to investigate exercise capacity and physical activity levels of adult survivors of childhood ALL and their associations with ...
Laura Jess   +5 more
wiley   +1 more source

Dynamic Modeling and Stability Analysis of a Control Moment Gyroscope Considering the Influence of a Flexible Vibration Isolator

open access: yesIEEE Access
Microvibrations of spacecraft are mainly generated by control moment gyroscopes (CMGs), which seriously reduces the effectiveness of spacecraft attitude control. Considerable work about vibration isolators has been conducted for isolating microvibrations
Lei Chen   +5 more
doaj   +1 more source

Overview of Inertia Enhancement Methods in DC System

open access: yesEnergies, 2022
The modern power system is experiencing transformation from the rotational-generation-equipment-dominated system to a power-electronics-converter-dominated system, with the increasing penetration of renewable energy resources such as wind and ...
Feng Wang   +3 more
doaj   +1 more source

How to counter organisational inertia to enable knowledge management practices adoption in public sector organisations [PDF]

open access: yes, 2021
Purpose: Knowledge management (KM) is associated with higher performance and innovative culture; KM can help public sector to be fiscally lean and meet diverse stakeholders’ needs.
Al Badi Al Dhaheri, M.S.M.   +7 more
core   +1 more source

Microbiome−host proteostasis crosstalk—An emerging perspective on mechanisms and interventions toward healthy longevity

open access: yesFEBS Letters, EarlyView.
Proteostasis and the gut microbiota play a key role in shaping host physiology. Microbiota‐derived metabolites, vitamins, and RNA modulate host proteostasis. Findings from model systems, including C. elegans, indicate microbes can either stabilize or disrupt host proteostasis.
Abhishek Anil Dubey, Maria Ermolaeva
wiley   +1 more source

Enhancing Power System Frequency with a Novel Load Shedding Method Including Monitoring of Synchronous Condensers’ Power Injections

open access: yesEnergies, 2021
Under-frequency load shedding (UFLS) is a classic and a commonly accepted measure used to mitigate the frequency disturbances in case of loss-of-generation incidents in AC power grids.
Antans Sauhats   +4 more
doaj   +1 more source

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