Results 11 to 20 of about 662,498 (269)

Finite-element method for the analysis of surface stress concentration factor and relative stress gradient for machined surfaces [PDF]

open access: yesMechanical Sciences, 2023
Surface topography is an important parameter for evaluating the quality of surface machining, and the stress concentrations produced at notches can have a profound effect on the fatigue life of notched components. The stress concentration factor (SCF, Kt)
G. Xu   +11 more
doaj   +1 more source

On the Tribocorrosion Behavior of Fe-Mn-Al-C Alloys in Ringer’s Solution

open access: yesMetals, 2022
The long-term performance of steels is affected by the simultaneous actions of wear and corrosion, known as tribocorrosion. The tribocorrosion behavior of fully austenitic steels: Fe-Mn-xAl-C (x = 0, 3.5 and 8.3 wt.%) in Ringer’s solution was ...
Gisselle M. Barona-Osorio   +3 more
doaj   +1 more source

Resting state connectivity correlates with drug and placebo response in fibromyalgia patients

open access: yesNeuroImage: Clinical, 2014
Fibromyalgia is a chronic pain syndrome characterized by widespread pain, fatigue, and memory and mood disturbances. Despite advances in our understanding of the underlying pathophysiology, treatment is often challenging.
T. Schmidt-Wilcke   +7 more
doaj   +1 more source

Relationships between brain metabolite levels, functional connectivity, and negative mood in urologic chronic pelvic pain syndrome patients compared to controls: A MAPP research network study

open access: yesNeuroImage: Clinical, 2018
Until recently, the predominant pathology of chronic pelvic pain conditions was thought to reside in the peripheral tissues. However, mounting evidence from neuroimaging studies suggests an important role of the central nervous system in the pathogenesis
Daniel E. Harper   +7 more
doaj   +1 more source

Research Development on Bonded-bolted Hybrid Joint in Composite Structure

open access: yesHangkong gongcheng jinzhan, 2021
The composite bonded-bolted hybrid joint (BBHJ) is widely focused and developed in aerospace and aviation fields for its full consideration of advantages of bolt and bonded joint.
ZOU Peng   +3 more
doaj   +1 more source

Daytime Exposure to Blue-Enriched Light Counters the Effects of Sleep Restriction on Cortisol, Testosterone, Alpha-Amylase and Executive Processes

open access: yesFrontiers in Neuroscience, 2020
Sleep debt is becoming a better acknowledged cause of physiological stress and neurobehavioral deficits with major public-health concerns. We investigated whether exposure to blue light during daytime could be an efficient countermeasure to limit sleep ...
Brice Faraut   +19 more
doaj   +1 more source

Early Relationships of a Low‐Energy Diet With Symptoms of Fibromyalgia

open access: yesACR Open Rheumatology, 2022
Objective Previous studies have demonstrated that weight loss has been shown to improve pain in weight‐bearing joints, and more recent studies suggest that weight loss may be accompanied by improvements in pain in non–weight‐bearing regions.
Aaron Stubbs   +9 more
doaj   +1 more source

Stress biomarkers, mood states and sleep during a major competition: success and failure athlete’s profile of high-level swimmers.

open access: yesFrontiers in Physiology, 2016
The aim of this study was to evaluate stress markers, mood states and sleep indicators in high-level swimmers during a major 7-days competition according to the outcomes. Nine swimmers (6 men and 3 women (age: 22 ± 2 years and 22 ± 4 years, respectively)
MOUNIR eCHENNAOUI   +10 more
doaj   +1 more source

Characterization of a New Lignocellulosic Fiber from Brazil: Imperata brasiliensis (Brazilian Satintail) as an Alternative Source for Nanocellulose Extraction

open access: yesJournal of Natural Fibers, 2017
The chemical, physical and thermal properties of a new lignocellulosic fiber from Brazil (Imperata brasiliensis) were examined by SEM, chemical composition, XRD, FTIR, and TGA.
Kelly Cristina Coelho de Carvalho Benini   +4 more
doaj   +1 more source

Application research on 5G technology in fatigue test of full-scale aircraft

open access: yesHangkong gongcheng jinzhan, 2023
With the development of aircraft demand, and emerging of new material and new process, the test and validation technology of aircraft structure strength will also face new challenges.
LIU Bing, ZHANG Jianfeng, MU Bin
doaj   +1 more source

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