Results 81 to 90 of about 13,304,558 (343)

Relationship between lower limb muscle strength and single-leg sit-to-stand performance in young adults

open access: yesJournal of Associated Medical Sciences, 2014
Objective: The purpose of this study was to determine the appropriate protocol of the single-leg sit-to-stand (STS) test in terms of number of repetitions for assessment of the lower limb muscle strength in young adults by exploring relationship between ...
Weerasak Tapanya, Samatchai Chamnongkich
doaj  

A novel distance‐based system reactive power index for system‐level reactive power reserve assessment

open access: yesIET Smart Grid, 2023
Voltage stability of the power system is of major concern with ever‐increasing stress in the transmission network. The availability of ample reactive power reserve is essential to ensure voltage stability of the power system. Voltage stability and status
Syed Muhammad Hur Rizvi
doaj   +1 more source

Power in global agriculture: economics, politics, and natural resources [PDF]

open access: yes, 2012
Recent events, such as the 2008 food price crisis, have focussed global attention on the agriculture and food sectors. In particular, many countries have become increasingly concerned with the issue of ensuring the security of their food supply and one ...
Islam, MM, Renwick, A, Thomson, S
core   +1 more source

Hematopoietic (stem) cells—The elixir of life?

open access: yesFEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo   +4 more
wiley   +1 more source

Changes in national power in the Global South: examining the World Power Index (1992-2022)

open access: yesRevista CIDOB d'Afers Internacionals
This paper examines the evolution of national power in the Global South between 1992 and 2022, using the World Power Index (WPI) as a quantitative and longitudinal measuring tool.
Daniel Morales Ruvalcaba
doaj   +1 more source

Peptide‐based ligand antagonists block a Vibrio cholerae adhesin

open access: yesFEBS Letters, EarlyView.
The structure of a peptide‐binding domain of the Vibrio cholerae adhesin FrhA was solved by X‐ray crystallography, revealing how the inhibitory peptide AGYTD binds tightly at its Ca2+‐coordinated pocket. Structure‐guided design incorporating D‐amino acids enhanced binding affinity, providing a foundation for developing anti‐adhesion therapeutics ...
Mingyu Wang   +9 more
wiley   +1 more source

Research of comprehensive quantitative evaluation of power quality of coal mine

open access: yesGong-kuang zidonghua, 2015
The current harmonic distortion reflecting the maximum load current was defined, and a distortion power factor considering non-sinusoidal current waveform was built according to special requirements of coal mine electrical load.
WANG Qingliang, YAO Miao
doaj   +1 more source

Nonspherical similarity solutions for dark halo formation [PDF]

open access: yes, 2010
We carry out fully 3-dimensional simulations of evolution from self-similar, spherically symmetric linear perturbations of a Cold Dark Matter dominated Einstein-de Sitter universe.
Antonov   +35 more
core   +1 more source

On subgroups of prime power index [PDF]

open access: yesPacific Journal of Mathematics, 1970
Let G he the direct sum of n ≥ 2 copies of the cyclic group, Z , of integers. Let p be a fixed prime and α ≥ 1 a fixed integer. Consider the subgroups, λ , of G of index p[superscript]α in G . Let S be a subset of G. We say S is a stellar set if ax ε S implies (1.1) x,2x,...,ax ε S for any x ε G and any integer a ≥ 1 .
openaire   +2 more sources

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