Particle-void fabric and effective stress reduction in cyclic liquefaction of granular soils

Author(s):  
Jiangtao Wei
2021 ◽  
Vol 11 (1) ◽  
pp. 1-22
Author(s):  
K. Zhao ◽  
Q. Wang ◽  
Q. Chen ◽  
H. Zhuang ◽  
G. Chen

2019 ◽  
Vol 38 (3) ◽  
pp. 135-143 ◽  
Author(s):  
Rachel Joseph ◽  
Amelia Wellings ◽  
Grace Votta

Stress in parents who have an infant in the NICU is well documented in literature. Prematurity and related comorbid conditions, high-tech NICU environments, presence of multidisciplinary health care professionals, altered parenting roles, and concerns of health outcomes in the infant are common stress factors. Further, inadequate management of stress can result in poor parent–infant bonding, poor infant outcome, and postpartum depression in parents. Effective stress management strategies may help parents adapt to their parental role thereby improving infant outcomes. Research has shown mindfulness-based strategies help reduce stress in the general population. Can this strategy be applied in the context of parents of infants in the NICU? Literature is scant on the impact of mindfulness-based strategies on parents of infants in the NICU and on the infant's health outcomes. This article explores the application of mindfulness-based strategies to reduce stress in parents of infants in the NICU.


2019 ◽  
Vol 87 ◽  
pp. 41-55 ◽  
Author(s):  
Mohammad Taghi Hamzaban ◽  
Pål Drevland Jakobsen ◽  
Hadi Shakeri ◽  
Reza Najafi

2020 ◽  
Vol 11 ◽  
Author(s):  
Edward Callus ◽  
Barbara Bassola ◽  
Valentina Fiolo ◽  
Enrico G. Bertoldo ◽  
Silvana Pagliuca ◽  
...  

ObjectiveA rapid review was conducted to identify the most effective stress reduction techniques for health care providers dealing with patients infected with severe coronavirus (SARS, MERS, and COVID-19).MethodsPubMed, PsychInfo, Embase, and CINAHL databases were searched to identify relevant studies. Searches were restricted by date (2000 until present). All empirical quantitative and qualitative studies in which relaxation techniques of various types implemented on health care providers caring for patients during severe coronavirus pandemics and articles that consider the implementation of mental health care services considered to be pertinent, such as commentaries, were included.ResultsFourteen studies met the selection criteria, most of which were recommendations. Only one study described a digital intervention, and user satisfaction was measured. In the recommendations, both organizational and individual self-care interventions were suggested.ConclusionsFurther research is necessary to establish tailor-made effective stress reduction interventions for this population, during these challenging and particular times.


Author(s):  
Jérôme Duriez ◽  
Richard Wan ◽  
Mehdi Pouragha ◽  
Félix Darve

2018 ◽  
Vol 127 (1D) ◽  
pp. 37
Author(s):  
Tran Thanh Nhan ◽  
Hoang Thi Sinh Huong ◽  
Tran Ngoc Tin ◽  
Ho Trung Thanh ◽  
Le Thi Cat Tuong

In this paper, fine-grained samples at nominally 50% relative density of Nam O sand were tested by several series of uni-directional and multi-directional cyclic shears. The changes of cyclic shear-induced effective stress reduction were observed for a wide range of shear strain amplitudes and various cyclic shear directions and number of cycles. The effects of such cyclic shearing conditions on the liquefaction resistance of the soil were then clarified. It is indicated from experimental results that the effective stress in Nam O sand reduces quickly by the application of the cyclic shear and that the soil is liquefied even when the cyclic shear strain is at small amplitude (<em>g</em> = 0.1%). The effects of cyclic shear direction on the effective stress reduction and also on the liquefaction resistance of the soil are evident at small shear strain amplitude, these effects however decrease with <em>g</em> and become negligible when <em>g</em> ³ 1.0% at which the soil is liquefied after a very few number of cycles. The occurrence of liquefaction in Nam O sand can be observed precisely for various cyclic shear directions by using relations between the shear strain amplitude and the number of cycles. Liquefaction criterion of Nam O sand was finally obtained and discussed for both cases of uni-directional and multi-directional cyclic shears.


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