Search results for "Fatigue."

Dark consequences of social media-induced fear of missing out (FoMO): Social media stalking, comparisons, and fatigue

2021

Research on the dark side of social media usage has explored the fear of missing out (FoMO), social media fatigue (fatigue), social media stalking (stalking), and online social comparison (social comparison) independently. Accordingly, the complex interrelationships among these phenomena have remained understudied, creating a chasm that hinders a clearer understanding of their drivers and the potential counterstrategies to mitigate the collateral damage they may cause. We attempt to bridge this gap by drawing upon the theory of social comparison and the theory of compensatory internet use to formulate a framework that hypothesizes the mechanism of interaction among these negative fallouts. …

Effets aigus et chroniques de l’électrostimulation appliquée au niveau du nerf moteur : importance du retour afférent

2019

The aim of this thesis was to investigate the effects of electrical stimulation protocols favouring an indirect motor units’ (MU) recruitment via sensory axons activation and giving rise to extra force development, on the neuromuscular system. These protocols use wide pulse duration, low stimulation intensity, low and high stimulation frequencies and are applied over the motor nerve. The aim of the first study was to examine the effects of these protocols on the extent and origin of neuromuscular fatigue during an acute application. Results showed that for a similar impact on maximal force generating capacity, low stimulation frequencies limit force decreases during the stimulation trains a…

Respiratory Muscle Strengths and Their Association with Lean Mass and Handgrip Strengths in Older Institutionalized Individuals

2020

The study of reduced respiratory muscle strengths in relation to the loss of muscular function associated with ageing is of great interest in the study of sarcopenia in older institutionalized individuals. The present study assesses the association between respiratory muscle parameters and skeletal mass content and strength, and analyzes associations with blood cell counts and biochemical parameters related to protein, lipid, glucose and ion profiles. A multicenter cross-sectional study was performed among patients institutionalized in nursing homes. The respiratory muscle function was evaluated by peak expiratory flow, maximal respiratory pressures and spirometry parameters, and skeletal m…

Experimental Tests of Fatigue Induced Delamination in Gfrp and Cfrp Laminates

2007

This work deals with the experimental analysis of the delamination phenomena in various composite materials under different loading conditions. Quasi-static and fatigue tests are performed on specimens made of glass-fibre reinforced plastic (GFRP) and carbon-fibre reinforced plastic (CFRP). In particular, under both quasi-static and fatigue loading, single fracture modes I and II (using standard DCB and ENF test configurations) and mixed modes I+II (using the MMB test configuration) with several mode mixtures, have been analysed. Further experiments of delamination growth with mode mixture that varies with the crack length, will be performed.

Fatigue Design of Roller Bearing for Large FPSO Turrets

2012

The present report presents the fatigue design and a fatigue life prediction method for large roller bearings applied in the turret turn table for large Floating Production Storage and Offloading (FPSO) units. The contact point between wheel and rail in these bearings is subjected to a multi-axial stress situation and both surface wear and fatigue cracking may occur. Stress analyses with contact elements are carried out and a methodology based on the Dang Van fatigue criterion is adopted. The criterion is based on an equivalent stress defined as a combination of the fluctuation of the shear stress from its mean value and the associated hydrostatic stress at a critical plane at any time. The…

Differential Effects of Two Contemplative Practice-based Programs for Health Care Professionals

2019

The aim of the study was testing the differential effectiveness of two interventions to improve Majorcan primary care professionals' quality of life: Mindful-Based Stress Reduction Training (MBSRT) and Compassion Cultivation Training (CCT). 50 professionals participated in the study; 81% were women. We evaluated mindfulness, empathy, self-compassion, and professional quality of life. Results showed statistically significant effects of the programs on the improvement of mindfulness, self-compassion, and professional quality of life, and differential effects on two dimensions of mindfulness, acting with awareness and non-reacting to inner experience, and on the dimension of burnout of the pro…

Measuring Muscle Fatigue in Relation to the Workload of Health Care Workers

2015

Abstract Number of work related musculoskeletal disorders due to ergonomics risks among workers in Europe, including Latvia, is growing. Employees in health care professions admit physical load and discomfort in various body parts after the shift. According to Eurostat statistical data 60% of total work related diseases are attributed to musculoskeletal disorders in Latvia. The aim of this study was to determine the muscle fatigue caused by physical load for surgeons, anaesthetists and geneticists in one of the largest Hospitals in Latvia. The research involved 9 surgeons, 9 anaesthetists and 7 geneticists with chronic pain (for four months or more) in the neck, shoulders, arms, hands and l…

The relationship between BAFF serum levels, anti-NMDAR autoantibodies and fatigue in patients with systemic lupus erythematosus and multiple sclerosi…

2020

Factors mediating social media-induced fear of missing out (FoMO) and social media fatigue: A comparative study among Instagram and Snapchat users

2022

The proliferation of social media platforms has provided researchers with ample opportunities to explore the implications of these platforms' positive and negative use. Focusing on the latter, the literature has highlighted the severe implications of the fear of missing out (FoMO) and its associations with negative aspects of social media use, such as the problematic use of social media, phubbing, and reduced well-being. Our study investigates the association between FoMO and social media fatigue, which is mediated by information and communication overload, online subjective well-being (OSWB), and compulsive social media use (compulsive use). The proposed model is grounded strongly in self-…

Multiscale modeling of polycrystalline materials: A boundary element approach to material degradation and fracture

2015

Abstract In this work, a two-scale approach to degradation and failure in polycrystalline materials is proposed. The formulation involves the engineering component level (macro-scale) and the material grain level (micro-scale). The macro-continuum is modeled using a three-dimensional boundary element formulation in which the presence of damage is formulated through an initial stress approach to account for the local softening in the neighborhood of points experiencing degradation at the micro-scale. The microscopic degradation is explicitly modeled by associating Representative Volume Elements (RVEs) to relevant points of the macro continuum, for representing the polycrystalline microstruct…