Results 11 to 20 of about 2,262,838 (324)

Experimental Study on the Workability and Stability of Steel Slag Self-Compacting Concrete

open access: yesApplied Sciences, 2020
There is important application value and economic value in exploring the potential use of steel slag to prepare self-compacting concrete (SCC) and make full use of solid waste resources.
Suiwei Pan   +5 more
doaj   +1 more source

Research on Parametric Vibration of a Steel Truss Corridor under Pedestrians Excitation Considering the Time-Delay Effect

open access: yesBuildings, 2022
With the development of the Steel Truss Corridor (STC) toward long-span and gentle development, human-induced vibration often causes large lateral vibration problems and time-delay effects of the STC, which will have a non-negligible impact on the ...
Zhou Chen   +6 more
doaj   +1 more source

Improving Dynamic Security in Islanded Power Systems: Quantification of Minimum Synchronous Inertia Considering Fault-Induced Frequency Deviations

open access: yesElectricity, 2023
In isolated power systems with very high instantaneous shares of renewables, additional inertia should be used as a complementary resource to battery energy storage systems (BESSs) for improving frequency stability, which can be provided by synchronous ...
José Gouveia   +2 more
doaj   +1 more source

Specialized interfaces of Smc5/6 control hinge stability and DNA association

open access: yesNature Communications, 2017
Structural Maintenance of Chromosomes (SMC) complexes maintain genome integrity by regulating the segregation of chromosomes. Here, Altet al. describe the structure of the heterodimeric Smc5/6-hinge from fission yeast and define functional features ...
Aaron Alt   +10 more
doaj   +1 more source

Base of Support, Step Length and Stride Width Estimation during Walking Using an Inertial and Infrared Wearable System

open access: yesSensors, 2023
The analysis of the stability of human gait may be effectively performed when estimates of the base of support are available. The base of support area is defined by the relative position of the feet when they are in contact with the ground and it is ...
Rachele Rossanigo   +6 more
doaj   +1 more source

Stability in dynamical astronomy [PDF]

open access: yesProceedings of the National Academy of Sciences, 1978
Hill's concept of stability is generalized and its relation to bifurcation theory is shown. A quantitative measure of stability is introduced that allows the comparison of the stability of different astronomical systems. Theoretical stability limits for triple stellar systems, for planetary systems, and for satellite systems are established.
openaire   +2 more sources

Experimental Research on the Dynamic Stability of Internal Turning Tools for Long Overhangs

open access: yesJournal of Manufacturing and Materials Processing, 2023
The roughness origin of machined surfaces is caused by the following physical causes: the copying of the shape and the roughness of the cutting part of the tool into the workpiece, the existence of vibration of the tool, and the existence of the build-up
Wallyson Thomas Alves da Silva   +2 more
doaj   +1 more source

Evaluation of Static and Dynamic Stability and Its Relationship With Fear of Falling in Patients With Mild to Moderate Knee Osteoarthritis [PDF]

open access: yesJournal of Rehabilitation, 2023
Objective Knee osteoarthritis is one of the most common musculoskeletal disorders affecting balance. It is also a risk factor for falling in older people. People with a history of falling, whether being injured or not, acquire a fear of potential falling,
Mahsa Kavyani Boroujeni   +3 more
doaj  

A Novel PLL Structure for Dynamic Stability Improvement of DFIG-based Wind Energy Generation Systems During Asymmetric LVRT

open access: yesJournal of Modern Power Systems and Clean Energy, 2023
The dynamic coupling effect, which is introduced by the dual-sequence phase-locked loops (PLLs) used in doublyfed induction generator (DFIG) based wind energy generation systems (WEGSs) during asymmetric low voltage ride-through (LVRT) in weak grid ...
Lei Guan, Jun Yao
doaj   +1 more source

Nonlinear Dynamic Measures of Walking in Healthy Older Adults: A Systematic Scoping Review

open access: yesSensors, 2022
Background: Maintaining a healthy gait into old age is key to preserving the quality of life and reducing the risk of falling. Nonlinear dynamic analyses (NDAs) are a promising method of identifying characteristics of people who are at risk of falling ...
Arezoo Amirpourabasi   +3 more
doaj   +1 more source

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